Nuvation Energy G5 High-Voltage BMS Product Manual

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Nuvation Energy G5 High-Voltage BMS

NUVG5 Product Manual

Document ID: NE-PM-011 | Revision: 1.7, 2024-07-26

BMS Software Version: Faraday Update 1

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Page 1 Nuvation Energy G5 High-Voltage BMS NUVG5 Product Manual Document ID: NE-PM-011 | Revision: 1.7, 2024-07-26 BMS Software Version: Faraday Update 1 © 2024 Nuvation Energy...
Page 2: Table Of Contents
Table of Contents 1. Introduction ............ ...
Page 3 3.6. Calibrate Nuvation Energy BMS ......... . .
Page 4 4.7. Control Settings ........... . . ...
Page 5 5.3.1.8. Nuvation Energy BMS Status........
Page 6 5.3.2.7. Open Wire .......... ...
Page 7 8.1.3. Thermal Faults .......... ...
Page 8 Battery and DC Bus High Current Connectors ........ ...
Page 9 The content in this document must be followed in order to ensure safe operation of Nuvation Energy BMS. The G5 High-Voltage BMS is to be installed in a location with restricted access.  Only skilled persons may install or service a system containing hazardous voltages that may be present when the system is energized.
Page 10: Introduction
Battery Management System supports up to 1500 V DC battery stacks and modules that use cells in the 1.6 V - 4.3 V range. The G5 High-Voltage BMS offers cutting edge features such as continuous cell balancing and the ability to manage 24 battery cells with each series connected G5 Cell Interface module.
Page 11: Product Overview
Voltage BMS. Figure 1. G5 High-Voltage BMS. Both Nuvation Energy G5 Stack Switchgear and G5 Cell Interface are designed to enable UL 1973 certification of the battery stack. The UL 1973 Recognized Nuvation Energy BMS in each stack ensures safe battery operation and significantly reduces the effort of certifying the Energy Storage System to meet UL 1973 and UL 9540.
Page 12 The Nuvation Energy G5 Cell Interface modules in each stack connect directly to battery cells to measure cell voltages and temperatures and provide cell balancing.
Page 13: Functional Overview
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 2.1. Functional Overview The Nuvation Energy G5 High-Voltage BMS provides many functions to allow flexible and configurable management and control of a stack. The following sections provide a brief summary of the product functions.
Page 14 The use of continuous balancing significantly increases operational time of the battery system managed by the Nuvation Energy BMS by decreasing the maintenance time to balance cells within the stack. Pre-Charge Circuit The G5 Stack Switchgear has a pre-charge circuit to ensure safe connection of its battery stack to the DC bus.
Page 15: G5 Stack Switchgear
▪ G5 Stack Switchgear, 1500 V, 350 A Within a battery stack, the G5 Stack Switchgear connects to the daisy-chained Nuvation Energy G5 Cell Interface modules. The G5 Cell Interface modules convert cell voltage and temperature measurements to digital values to be relayed to the G5 Stack Switchgear, and enable or disable cell balancing as required.
Page 16 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual ▪ Under Voltage Lockout (UVLO) Enable Config Switch ▪ AC Fan Circuit Breaker The internal high-current path of G5 Stack Switchgear is shown in the block diagram below: Figure 5. G5 High-Voltage BMS internal high-current path.
Page 17: G5 Cell Interface
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 2.3. G5 Cell Interface The Nuvation Energy G5 Cell Interface is the direct link between the individual battery stack cells and the rest of the Battery Management System. It facilitates battery monitoring and balancing functionalities.
Page 18: G5 Bms Software
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 2.4. G5 BMS Software The Nuvation Energy G5 BMS Software is composed of two parts: the Operator Interface and the G5 BMS Firmware. 2.4.1. Operator Interface Figure 7. Operator Interface Dashboard The Operator Interface is a browser-based graphical view of the system state, data, and configuration.
Page 19 ▪ Shutdown Input - An input signal to the G5 Stack Switchgear that when asserted will trigger a software managed disconnection of a stack followed by the G5 High-Voltage BMS powering off. ▪ Disconnect Input - An input signal to the G5 Stack Switchgear that when asserted will trigger either a software or hardware managed disconnection of a stack.
Page 20: Installation Instructions
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 3. Installation Instructions 3.1. Quick Start Guide  Prior to installation, please review the full set of safety warnings in Important Safety Information. Overview of the Installation & Setup Process ...
Page 21: G5 Cell Interface
▪ 1x Cat5e Ethernet cable These cables are available for purchase as a kit. The instructions below are for applications using cable harnesses purchased from Nuvation Energy. To build custom cables, refer to G5 Cell Interface Connectors for connector pin-out and specifications.
Page 22: Mechanical Installation
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 3.2.2. Mechanical Installation 3.2.2.1. Dimensions and Weight The overall dimensions of the G5 Cell Interface are 118.5mm x 116.2mm x 25.4mm and weighs approximately 116g. The G5 Cell Interface is available in a bulkhead-mountable enclosure as shown below.
Page 23: Mounting Instructions
The G5 Cell Interface is rated to operate in the temperature range of -20 °C to 60 °C. It is designed for indoor use. The G5 Cell Interface should be mounted against a flat surface with vent above the Nuvation Energy logo pointing up to the sky.
Page 24: Electrical Connections
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 3.2.3. Electrical Connections The G5 Cell Interface connects to the battery stack-referenced signals through high-  voltage rated connectors. Safety precautions are required to handle and connect cables into this module.
Page 25: Connect The Voltage And Temperature Sensors Cable
The temperature sensor wires include 10 kΩ NTC thermistors for temperature measurement of the cells and surrounding area. These sensors are used by Nuvation Energy BMS to detect over and under temperature conditions and adjust battery current limits to compensate for cell temperature.
Page 26: Connection Procedure
The G5 Stack Switchgear is configured for a specific battery topology based on the details provided to Nuvation Energy during order fulfillment. Failure to use the same number of G5 Cell Interface modules or using a different battery topology will result ...
Page 27 ▪ Wiring errors can cause damage to the G5 Cell Interface and the battery cells. Nuvation Energy recommends using the G5 Cell Connection Tester to verify  connections and detect wiring errors that could damage a G5 Cell Interface. Please contact support@nuvationenergy.com...
Page 28 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 13. Example wiring 24 cells in a G5 Cell Interface - 24 channel Figure 14. Example wiring 20 cells in a G5 Cell Interface - 24 channel Document ID: NE-PM-011 Rev 1.7, 2024-07-26...
Page 29: Connect The Link Bus Cable
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 15. Example wiring 13 cells in a G5 Cell Interface - 24 channel 3.2.3.3. Connect the Link Bus Cable Table 2. Link In and Link Out - Ports and Cable Figure 16.
Page 30 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual standard Ethernet cables. ▪ The Link Bus cable is used to connect G5 Cell Interface modules in a daisy chain (called the Link Bus chain) by connecting the 'Link Out' of one G5 Cell Interface to the 'Link In' of the next G5 Cell Interface in ascending series voltage order.
Page 31: G5 Stack Switchgear
▪ 1x GPIO Control Cable These cables are available for purchase as a kit. The instructions below are for applications using cable harnesses purchased from Nuvation Energy. To build custom cables, refer to G5 Stack Switchgear Connectors for connector pin-out and specifications.
Page 32: Mechanical Installation
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 3.3.2. Mechanical Installation 3.3.2.1. Dimensions and Weight The G5 Stack Switchgear is 4U (rack-units) tall. The unit weighs 23.5 kg [51.8 lbs]. Figure 18. Mechanical Drawing of G5 Stack Switchgear ...
Page 33: Installation Location And Position
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 3.3.2.2. Installation Location and Position The G5 Stack Switchgear is primarily designed to fit in a standard 19" rack with a 23"-deep cabinet. However, other mounting possibilities are supported, as the following subsections discuss. By default, the G5 Stack Switchgear ships with brackets for shelf mounting.
Page 34: Shelf-Mount
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Shelf-Mount Figure 20. Product with brackets installed Figure 19. Shelf Mount (NUVP-SSG-SB-B) A G5 Stack Switchgear may be mounted on a horizontal surface, with the aid of shelf-mount brackets, as shown above.
Page 35 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 21. Dimensions, shelf-mount Front-securing Rack-Mount, 19" Document ID: NE-PM-011 Rev 1.7, 2024-07-26 Faraday Update 1...
Page 36 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 22. Rack Mount (NUVP-SSG-RB-19-B) Figure 23. Product with brackets installed These brackets are designed to secure the front of the unit with respect to the front of the rack. The mounting brackets allow for adjusting how far the unit protrudes or recedes from the front of the rack.
Page 37 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 24. Dimensions, rack-mount, 19", front-securing Document ID: NE-PM-011 Rev 1.7, 2024-07-26 Faraday Update 1...
Page 38: Electrical Connections
These cables are available for purchase as a kit from https://nstore.nuvationenergy.com. Figure 25. Example G5 Stack Switchgear cable kit contents The instructions below are for applications using cable harnesses purchased from Nuvation Energy. To Document ID: NE-PM-011 Rev 1.7, 2024-07-26...
Page 39 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual build custom cables, refer to G5 Stack Switchgear Connectors for connector pin-out and specifications. Connection sequence ▪ Step 1: Ensure system is de-energized ▪ Step 2: Ground the G5 Stack Switchgear ▪...
Page 40: Ensure System Is De-Energized
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 3.3.3.2. Ensure system is de-energized  Ensure that the Service Disconnect switch is in the Lock Out position. Service Disconnect The manual Service Disconnect switch is accessible on the front of the G5 Stack Switchgear. Use the lock-out/tag-out function to ensure that the battery stack does not connect to the DC bus or Power Conversion System (PCS) during installation.
Page 41: Connect Power In And Fan Control
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual the automatic over-current device in the circuit, as shown in Table 3, “Minimum grounding wire size”. Table 3. Minimum grounding wire size Grounding Wire (AWG) G5 Stack Switchgear Current Rating (A)
Page 42 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 30. AC cable (NUVW-B15H03-010) Figure 29. Power and Fan port Compatible with either AC or DC cable. Figure 31. DC cable (NUVW-B16H03-010) If you are building your own cables, please refer to the pin-out for this connector in ...
Page 43: Ac Fan Breaker And Dc Fan Overload Protection
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual The figure below provides the internal wiring implementation of the fan control parts shown above. Figure 32. Battery cooling fan control wiring diagram  Power to the G5 Stack Switchgear and the fans is expected to be de-energized before installation;...
Page 44: Connect Control To General Purpose Input/Output (Gpio) Cable
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 33. AC Fan Breaker DC Fan Overload Protection is provided by an internal smart integrated circuit which sends feedback to the system if it trips due to an overload. The integrated circuit can auto-reset when the cause of the overload trip has been resolved.
Page 45: Connect Ethernet Cable To External Computer
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual ▪ Ground Fault Detector input ▪ Manual clear G5 Stack Switchgear faults input Connect the Control GPIO cable to the connector on the front of the G5 Stack Switchgear. Table 5. Control GPIO - Port and Cable options Figure 35.
Page 46: Connect Link Out Cable To G5 Cell Interface
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 37. Ethernet cable (NUVW-D01X00-020) Figure 36. Ethernet Connector The Ethernet connector is a standard RJ45 Ethernet jack. It may be used to connect the G5 Stack Switchgear to an external system, such as: ▪...
Page 47: Set The Config Switches
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 39. Ethernet cable (NUVW-D01X00-020) Figure 38. Link Out Connector The Link Out connector provides communication to the G5 Cell Interface modules. Typically, the Link Bus is connected to the G5 Cell Interface module which measures the most negative cell, with each subsequent G5 Cell Interface module measuring increasingly positive cells.
Page 48 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 40. Config Switches Set the switch positions for the desired functionality that they manage. The G5 Battery Management System will continue to discharge battery cells below  the low voltage fault threshold unless UVLO has been enabled. For unattended applications, it is strongly encouraged to enable UVLO.
Page 49: Connect Battery Stack And Dc Bus
G5 Stack Switchgear continues execution ignoring the Factory Restore switch. The network configuration is reset when a factory restore is performed. Changes in config switch settings must occur when the Nuvation Energy G5 Stack Switchgear is powered off.
Page 50 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual The connectors use M10 screws (included) and are intended for M10 lugs (not included, e.g. Panduit Corp LCMA50-10-L). Flexible snap-on terminal covers are included. The maximum acceptable terminal lug tongue width is 1.1 inches and the maximum wire outer diameter (including insulation) is 0.817 inches.
Page 51 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual A simple voltage check (i.e. across the positive and negative terminals) is not always sufficient, especially with grounded battery stacks. It is recommended to also check for voltage between each conductor and ground.
Page 52: First Power-Up
Section 5.3.5, “Understanding the Service Lockout and Self Check” for further details operational details of Service Lockout. The G5 High-Voltage BMS can now be managed from a computer using the Operator Interface. Refer to the subsequent Section 3.5, “Operator Interface Installation”...
Page 53: Operator Interface Installation
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 3.5. Operator Interface Installation 3.5.1. Download and Install The Operator Interface is used to access the G5 High-Voltage BMS. It must be installed on a local PC to access the BMS over a network connection. Download Visit https://www.nuvationenergy.com/technical-resources...
Page 54 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual different from this list. Setup the Static IP address on the PC Instructions below are for a PC running Windows OS: 1. Go to Control Panel > Network and Sharing Center 2.
Page 55: Launch Operator Interface
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual ◦ For example, if the G5 Stack Switchgear IP address is 192.168.1.21, the gateway address would be 192.168.1.1 Figure 44. Network Adapter Settings on Windows 5. Ensure your computer is on the same network as your G5 Stack Switchgear.
Page 56 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual address. See Section 3.5.2, “Setup PC Network Adapter”. Document ID: NE-PM-011 Rev 1.7, 2024-07-26 Faraday Update 1...
Page 57: Calibrate Nuvation Energy Bms
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 3.6. Calibrate Nuvation Energy BMS Nuvation Energy has pre-calibrated each G5 Stack Switchgear with its own gain and limit. Each unit will have its own set of calibrations which must be maintained when applying an upgrade or configuration update.
Page 58: Configuration Settings
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 4. Configuration Settings G5 High-Voltage BMS is a highly customizable product. This section details the various configuration options available. Configuration settings can be imported via a .config file or modified by using the 'Register Browser' in the Operator Interface.
Page 59: Configuration File Import Troubleshooting
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Import new Configuration File G5 High-Voltage BMS must be in Service Lockout before the file can be imported. To Import a Configuration: 1. Unlock the Operator Interface by clicking the 'Lock' icon.
Page 60: Background And Terminology
BMS registers to Modbus registers. 4.2.1.1. Index versus Location Internally to Nuvation Energy BMS firmware, all register indexing is zero-based. That is, if multiple instances of the same register are present, the first instance is always indexed at zero. This Document ID: NE-PM-011 Rev 1.7, 2024-07-26...
Page 61: Register Expressions
G5 Cell Interface. The index of this first cell is defined as zero within the firmware. 4.2.1.2. Register Expressions Registers are accessed by name in Nuvation Energy BMS tools and configuration. Each register also has a unique address that is used internally within the BMS. Single Register Instance...
Page 62 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual instances of the register cell.voltage, the expression cell[0:3:16].voltage expands into: cell[0].voltage cell[1].voltage cell[2].voltage cell[3].voltage cell[16].voltage cell[17].voltage cell[18].voltage cell[19].voltage cell[32].voltage cell[33].voltage cell[34].voltage cell[35].voltage cell[N-16].voltage cell[N-15].voltage cell[N-14].voltage cell[N-13].voltage ▪ start_index:end_index:block_length:block_count - All instances from start_index through end_index within a repeating block of block_length repeated block_count times.
Page 63: Register Address
4.2.2. Units A standard set of types/units has been adopted for use within Nuvation Energy BMS for the measurements and configuration settings. Unless otherwise noted, the units used within the firmware should be assumed as defined below.
Page 64 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Table 10. Standard Types and Units Type Units Variable Type Application Address none uint32 BMS register address Boolean false=0, true=1 uint8 Logic value Charge int64 Depth of discharge and throughput Count...
Page 65: Storage Types
“Registers”. 4.2.4. Configuration File Configuration is stored externally to Nuvation Energy BMS in a plain-text file. This file defines the state of configuration registers as required for a particular system. The G5 High-Voltage BMS ships with a configuration file specific for its end ...
Page 66: Factory Lockdown
Factory Lockdown can be enabled by writing to specific registers from the Operator Interface. The user must follow the process below for the Nuvation Energy BMS to be considered factory-locked. 1. Ensure all factory registers are configured to their desired value 2.
Page 67: Restricted Register Write Operations
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual G5 Stack Switchgear. 4.3.4. Restricted Register Write Operations When Factory Lockdown has been enabled, all register writes are restricted through external interfaces (e.g. Modbus-TCP, HTTP) with some exceptions. A 'whitelist' of registers which can be...
Page 68: Battery Parameters
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Register Name Register Address (hexadecimal) cell_val_persist.load 0x4831 cell_val_persist.error 0x4832 sc_network_cfg_persist.save 0x4840 sc_network_cfg_persist.load 0x4841 sc_network_cfg_persist.error 0x4842 sc_clock_err_stats.reset 0x29433 sc_stack_stat.reset 0x344E3 sc_linkbus_stat.reset 0x345E3 sc_rom_test_stat.reset 0x346E3 sc_ram_test_stat.reset 0x347E3 stack_balance_stat.update 0x44EE5 stack_soc.reset 0x163E3 stack_soc.reset_soc 0x163E4 stack_soc.reset_capacity...
Page 69: Stack Cycle Count
4.4.3. State-of-Health The State-of-Health (SoH) is a value that can be used to describe the battery’s current performance relative to its performance at beginning of life. Nuvation Energy BMS estimates SoH by using one or both of the following two metrics: 1.
Page 70: Battery Empty Condition
BMS. The algorithm requires a configuration of the open circuit voltage for the battery. The following parameters are used to select and enable which state of charge for the Nuvation Energy BMS. Table 12. Current Full Condition Configuration Register...
Page 71: Battery Full Condition
A battery can reach the full condition while charging (i.e. when the BMS reads negative current measurements) Nuvation Energy BMS supports the definition of the full condition using a combination of cell voltage and battery current measurements. This condition is configurable using the following register settings.
Page 72: Open Circuit Voltage Curve
SoC operation. 4.4.5. Open Circuit Voltage Curve Nuvation Energy BMS supports the use of a open-circuit voltage (OCV) table for the battery cells. The component stack_ocv_lut stores the voltages unique for each SoC percentage (total of 101 entries).
Page 73: Stack Topology
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual stack_nameplate.label0 ▪ First 8 characters of the battery stack’s name which will be displayed as a banner on the Operator Interface stack_nameplate.label1 ▪ Next 8 characters of the battery stack’s name after stack_nameplate.label0 stack_nameplate.label2...
Page 74: Thermistor Inputs
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual cell[n].installed ▪ Indicates a cell is physically connected ▪ Set to 1 if connected ▪ Set to 0 if not connected To configure the G5 Cell Interface - 24 channel for G5 Stack Switchgear, the following register configurations must be applied.
Page 75: Triggers
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual unsafe limits Nuvation Energy BMS can either be in an operating or non-operating zone. The operating zone is also known as the All Clear zone while the non-operating zone is further divided into the Warning and Fault zones.
Page 76: Basic Triggers
4.6.1.1. Basic Triggers A Basic Trigger is the most fundamental type of trigger in Nuvation Energy BMS. This trigger is latching meaning a tripped trigger will not self-clear when the trigger condition is cleared. The trigger will remain tripped until explicitly cleared through an external request via the Operator Interface or a supported protocol.
Page 77: User-Defined Triggers
4.6.1.5. Externally Activated Fault and Warning At times there is a need for the G5 High-Voltage BMS to react to events external to itself. For example if a ground fault detection failure was determined in the stack, it would be desirable for that external detection to disconnect the stack.
Page 78 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 46. Typical Arrangement of Cell Voltage Thresholds These thresholds also affect the current limits of the system as shown below. Figure 47. Typical Arrangement of Cell Voltage Current Limits Most systems will make use of thresholds configured in the following order of decreasing cell voltage.
Page 79: Thermistor Temperature Thresholds
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Register Setting The upper limit of the operating zone. Set just above stack_warn_cell_hi.thresh stack_current_limit.voltage_cell_max. The voltage at which charge limits approach 0%. Set just above stack_current_limit.voltage_cell_max stack_soc.vfull. The voltage at which charge current limits are reduced from stack_current_limit.voltage_cell_high...
Page 80 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Separate configuration thresholds are provided for charging and discharging as many cells have different temperature limits in these two modes of operation. Charge triggers will only trip while the stack is charging, while discharge triggers will only trip while the stack is discharging or resting.
Page 81 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Register Setting The limit within the fault zone above which an explicit user stack_fault_charge_therm_over.thresh operation is required to bring the system back into an operating state. The upper limit of the warning charging zone as per cell stack_fault_charge_therm_hi.thresh...
Page 82: Stack Current Thresholds
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Register Setting The limit within the fault zone below which an explicit user stack_fault_discharge_therm_under.thresh operation is required to bring the system back into an operating state. The temperature charge and discharge thresholds can be configured in a similar manner to how the cell voltage thresholds (Section 4.6.2, “Cell Voltage...
Page 83 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 50. Typical Arrangement of Current Thresholds The stack current thresholds are used to define the limits of the operating zone and non-operating zone for charge and discharge currents. These limits must factor in the specifications of the battery cells as well as the limits of any DC current-carrying paths in the stack.
Page 84: Stack Voltage Thresholds
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Register Setting The limit within the fault zone below which an explicit user stack_fault_discharge_current_over.thresh operation is required to bring the system back into an operating state. The limit within the fault zone below which an explicit user ssg_bus_fault_discharge_current_over.thresh...
Page 85 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual applications. Figure 51. Typical Arrangement of Stack Voltage Thresholds These thresholds also affect the current limits of the system as shown below. Figure 52. Typical Arrangement of Stack Voltage Current Limits Stack voltage thresholds are used to define the operating voltage limits of the overall battery stack design.
Page 86 The stack voltage thresholds can be configured in a similar manner to how the cell voltage thresholds (Section 4.6.2, “Cell Voltage Thresholds”) are configured. Concurrently, Nuvation Energy BMS includes separate voltage based triggers which derive from Table 40, “Voltage and Temperature Sensor Specifications for all Configurations”.
Page 87: External Controller Heartbeat
Control for cases (1) and (4) is achieved through external switching devices that are under the control of Nuvation Energy BMS. This control is limited to hard switching. Control for case (2) is achieved through current limiting signals that are used by chargers and inverters to throttle current dynamically.
Page 88 This process is covered in detail in Section 4.8, “Input / Output Assignment”. Auto-Connection Setting It is sometimes desired for the Nuvation Energy BMS to automatically initiate a connection of a Document ID: NE-PM-011 Rev 1.7, 2024-07-26 Faraday Update 1...
Page 89 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual battery stack when: ▪ The BMS powers on ▪ After all faults have been cleared This operation can be configured with the following register setting. stack_control.auto_connect ▪ When set to a value of one, the BMS will initiate a connection of the battery stack if there are no faults triggered ▪...
Page 90 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual  stack_control.disable_precharge must be set to 0 for this register to have an effect stack_control.disable_connecting ▪ If value is set to 1, the system will immediately enter the connected state after pre-charge completes stack_control.connect_delay...
Page 91: Contactor Configuration
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual A pre-charge operation only completes successfully if the stack current magnitude falls below the maximum pre-charge current within configured delay time stack_fault_precharge_over_current does not trip.  If pre-charge is enabled the fault stack_fault_precharge_timeout must also be enabled.
Page 92: Current Limits
4.7.3. Current Limits The Nuvation Energy BMS supplies configurable current limits for the charge and discharge directions of a battery stack. The current limits provide a feedback to an external control system to gradually taper the current demanded from the battery as the stack approaches its full (100% SOC) and empty (0% SOC) states.
Page 93: Current Limit Behavior
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual stack_current_limit.discharge_current_limit ▪ The discharge current limit in milliamps. SunSpec (Draft 3) Modbus Points SunSpec 802 Model: Maximum Charge Current (MaxBatACha) ▪ Modbus address 40106 at unit identifier 1 ▪ Single point of unsigned data ▪...
Page 94 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual limiting to function properly. These values correspond to the current limit values that will be used during normal wide-open operation (i.e. no throttling). stack_current_limit.max_charge_current ▪ Magnitude of maximum continuous operating charge current stack_current_limit.max_discharge_current...
Page 95: Passive Cell Balancing
A number of configurable settings are used to fine-tune the passive balancing algorithm for voltage, temperature, current, and duty cycle. There are two choices of balancing algorithms available to execute on the Nuvation Energy BMS. Only one of the algorithms can be enabled at a time. Enabling one algorithm will immediately disable the other algorithm.
Page 96 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Settings for Voltage Based Cell Balancing Both absolute and relative cell voltage thresholds are used to safely balance a stack of batteries. min_enable_voltage is the absolute threshold that determines the voltage below which a cell will not be balanced.
Page 97: Cell Balancing Duty Cycle
50 ms and must be smaller then the linkbus scan period. 4.7.5. Continuous Balancing G5 High-Voltage BMS introduces a passive balancing algorithm which increases the operational time of a battery stack and minimize the time spent balancing cells. Traditional voltage based balancing requires that the cells maintain a difference in voltages to identify the cells requiring balancing.
Page 98: Frequency Of Continuous Balancing
Continuous balancing is an algorithm that minimizes this operational downtime by the following procedure: 1. A Nuvation Energy BMS continuously provide estimates on the imbalance in cells of a stack. The best results of imbalance estimations are often at the top of a charge cycle of a battery stack.
Page 99: Cell Imbalance Estimation Components
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual depending on the application and cell chemistry of the battery stack. Nuvation Energy has prepared an application note on the frequency of this maintenance cycle which can be applied to a customers application.
Page 100: Cell Imbalance Estimations Status
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Register Suggested Value Description Defines a voltage estimation window, from full stack_imbalance_estimator[0]. stack_soc.vfull - 15 to a specific voltage point, where imbalance upper_estimation_voltage_window estimation can occur. A value of 3580 mV means, imbalance estimation can occur above 3580 mV.
Page 101: Balancing Counters Per Cell
The balancing event counters are persisted to non-volatile storage on a hourly period. 4.7.5.7. Thermal Throttling for Cell Balancing The G5 High-Voltage BMS now provides the capability to throttle cell balancing based on the internal temperature of G5 Cell Interface. Since the continuous balancing algorithm can balance for the full range of battery operation, throttling of balancing is done to protect the G5 Cell Interface from over- heating.
Page 102: Fan Control (Ac/Dc)
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Configuration Thermal throttling introduces two configuration registers for when to disable and re-enable cell balancing. Table 30. Thermal Throttling Configuration Register Suggested Description Value Maximum temperature threshold of the stack_balancing_throttling_estimator[0] Nuvation Energy G5 Cell Interface, above .disable_balancing_temperature...
Page 103: Manual Fan Control
4.7.6.2. Manual Fan Control The manual fan control allows external management to turn on and off fans of the Nuvation Energy BMS. It also could be used to verify that the wiring of fans is correct after installation. This control is managed by writing a value of zero or one to the following registers.
Page 104: Dc Fan Warning
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Register Recommended Values ssg_fan_control_dc[0]. address ssg_fan_control_dc[0]. address_enabled 4.7.6.3. DC Fan Warning independent warning power failures provided. component ssg_warn_fan_control_dc_error provides information on failures of the DC fan operation as detected by the hardware driver. This warning uses a hysteresis trigger. The default settings of this trigger are the expected configuration for this warning.
Page 105: General Purpose Digital Inputs
Clear faults: Hardware input to clear any latched fault conditions ▪ Fault Input: Request to fault to be generated by the Nuvation Energy BMS due to an external event (such as ground fault detection) General Purpose Digital Input functions are assigned through the following configuration registers.
Page 106: Disconnect Input
For advanced applications, General Purpose Digital Input may be configured to drive any Boolean register within the BMS. 4.8.3. Disconnect Input A separate Disconnect input is available on the G5 High-Voltage BMS as noted in I/O Connector When the Disconnect input is asserted it will instruct the hardware/software to disconnect the stack. There are two modes of operation of the Disconnect input: 1.
Page 107: Configuration
4.8.4. UVLO Enable Config Switch Input The enabling/disabling of the UVLO feature is managed by a config switch setting. UVLO is enabled on the G5 High-Voltage BMS when the config switch is placed in the ON position. Refer to Section 3.3.3.9, “Set the Config Switches”...
Page 108: Network Reset Switch
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Switches” for details on these config switches. The process of issuing a network reset or factory restore using the config switches is as follows: 1. Remove power from the G5 Stack Switchgear.
Page 109: Factory Restore Config Switch
(Section 4.8.4, “UVLO Enable Config Switch Input”). The Enable input keeps the G5 High-Voltage BMS turned on when features like Shutdown or UVLO are turning off the G5 High-Voltage BMS. Assert the Enable input to prevent these prior actions from happening.
Page 110: Measurement Calibration
4.10. Measurement Calibration The Nuvation Energy BMS provides calibration settings which allow the system to be fine-tuned for integration with a variety of measurement sensors. The preset values that ship with the BMS can be adjusted as required.
Page 111: Stack Current Calibration
6th order polynomial type, and display the equation on the chart. The equation will look like: These polynomial coefficients can then be used to configure Nuvation Energy BMS for this thermistor. An example plot of these measurements is shown in the next figure.
Page 112: Dc Bus Current Field Calibration
If the stack_power.current_gain register is set to outside of this limit, the gain applied will be limited to this value. Nuvation Energy has pre-calibrated each G5 Stack Switchgear with its own gain and limit. Each unit will have its own set of calibrations which must be maintained when ...
Page 113: Charge Deadband Setting
If the stack_power.voltage_gain register is set to outside of this limit, the gain applied will be limited to this value. Nuvation Energy has pre-calibrated each G5 Stack Switchgear with its own gain and  limit. Each unit will have its own set of calibrations which must be maintained when applying an upgrade or configuration update.
Page 114: Dc Bus Voltage Field Calibration
This is typically set to 1 second Performance of passive balancing is also closely related to the scan period. In Nuvation Energy BMS, a single wiring harness is used to measure cell voltage as well as bleed off passive cell balancing current.
Page 115: Cell Voltage Low-Pass Filter
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual sc_linkbus.balance_settle_period ▪ Settling period during which balancing is disabled before cell voltage measurement. ▪ Typically set between 50 and 100 ms For most systems, values between 50 and 100 ms yield accurate, stable measurements. When coupled with a scan period of 1000 ms, balancing duty cycles above 90% are achievable.
Page 116: Fault Pilot
This is typically 970, representing 0.97 4.11.4. Fault Pilot The Fault Pilot refers to internal hardware control for the Nuvation Energy BMS that is used to open the contactors through a secondary control path in the case of a fault condition. When the system is...
Page 117: Under-Voltage Lockout
Switches”. If this hardware configuration is not completed  then the G5 High-Voltage BMS will not be able to power itself off. The state of this configuration can be read through the register ssg_uvlo_enable.value. A value of 1 indicates UVLO is enabled and a value of 0 indicates UVLO is disabled.
Page 118: Clock Verification
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual stack_fault_voltage_lo.thresh. The above triggers are logically OR’d together into a combined trigger named stack_uvlo_combined. The output of this trigger needs to be directed to the internal shutdown of the G5 High-Voltage BMS using the following register configuration. sc_gpo_shutdown.address ▪...
Page 119: Temperature Consistency Check
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Non-Steady-State Fuse Minimum Detection Steady-State Fuse Rating Temperature Derivative Code Current (A) Temperature Threshold Threshold 0.001 0.008 0.0025 0.005 0.01 0.01 0.005 0.01 0.01 0.005 0.01 0.01 0.004 0.01 0.01 The short shunt detection configurations are determined based on the G5 Stack Switchgear fuse rating and the battery’s current protection limits.
Page 120: Recommendation For Temperature Consistency Check
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual stack_fault_ci_therm_consistency.thresh ▪ The maximum temperature deviation, in units of °C, that is allowed between thermistors of a single G5 Cell Interface - 24 channel module ▪ Typically this is set to 15 In order to minimize this temperature deviation and prevent false trips, consider the following recommendations below.
Page 121: Contactor Life Tracking
4.11.9. Contactor Life Tracking Nuvation Energy BMS provides a mechanism to track the life of each contactor and to trigger a fault when it is end-of-life. The life of each contactor at any given time is determined by the various opening currents the contactor has experienced.
Page 122 = 199 ▪ ssg_contactor_life_tracker[0].max_life = 50  Consult the Nuvation Energy G5 High-Voltage BMS: NUVG5 Datasheet for specifications on contactor life ratings of your product model. A complete list of all contactor life tracking registers is shown below. ssg_contactor_life_tracker[n].enabled ▪...
Page 123: Watchdogs And Freshness
BMS watchdog. 4.12.1. Freshness Freshness is a mechanism in Nuvation Energy BMS to guarantee data within the system is up to date. Measurements such as cell voltage, cell temperatures, and stack voltage are captured on the G5 Cell Interface modules and the G5 Stack Switchgear.
Page 124 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual The freshness mechanism is exposed by the BMS through multiple freshness component. fresh.stale ▪ 1 indicates that the associated data has not been updated within the configured time and is considered stale ▪...
Page 125 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Freshness Component Associated Data Notes Ensures stack power information is stack_power_fresh stack_power.voltage updated. The period must be set stack_power.current longer than pi_afe.sample_period, typically 60000000 (60 seconds). Ensures Link Bus checks occur stack_linkbus_fresh sc_linkbus.power_error...
Page 126 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Freshness Component Associated Data Notes Ensures verification of all internal ssg_therms_fresh ssg_power_connector_therms.temperatur SSG temperature measurements are updated periodically. The period is ssg_ambient_therm.temperature typically 2000000 (2 seconds) ssg_shunt_therm.temperature ssg_fuse_therm.temperature Ensures verification of both voltage ssg_voltage_measurement_fresh stack_power.voltage...
Page 127: Operating Instructions
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5. Operating Instructions 5.1. Operating Limits 5.1.1. G5 Stack Switchgear  Exceeding the ratings will damage the system. 5.1.1.1. External Specifications Symbol Parameter Absolute Max Units Input Voltage AC V AC...
Page 128 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Table 40. Voltage and Temperature Sensor Specifications for all Configurations Symbol Parameter Absolute Max Units Battery Stack Specifications Stack Over-Voltage Threshold (triggers contactors to open) 1500 V DC configurable stack_ov Stack Under-Voltage Threshold (triggers contactors to open)
Page 129 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Contactor Life Ratings Table 45. Contactor Life Ratings : NUVG5-SSG-1500-200-x Symbol Parameter Absolute Max Units Minimum breaking current of contactors A DC min_breaking Number of contactor opening cycles below the minimum...
Page 130 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Contactors will open immediately for the following conditions which will bypass the disconnection delay:  1. Unpowering the G5 Stack Switchgear. 2. Using the Fast Disconnect feature. Document ID: NE-PM-011 Rev 1.7, 2024-07-26...
Page 131: G5 Cell Interface
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5.1.2. G5 Cell Interface  Exceeding the maximum ratings will damage the G5 Cell Interface module. 5.1.2.1. Electrical Characteristics Absolute Symbol Parameter Conditions Units Link In Specifications Output Current mA DC...
Page 132: Maximum Stack Deployment
20 (max) 1.51 5.1.3. Environmental Conditions The Nuvation Energy G5 High-Voltage BMS environmental conditions are captured in the table below. For transportation, it is recommended that the G5 Stack Switchgear be shipped in its original packaging via pallet whenever possible.
Page 133 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Unit Symbol Parameter Absolute Max Humidity Specifications Operational Relative Humidity Storage Relative Humidity Shock and Vibration Specifications Vertical Vertical shock/vibration (SAE J2380) Longitudinal Longitudinal shock/vibration (SAE J2380) Transverse Transverse shock/vibration (SAE J2380)
Page 134: Status Leds
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5.2. Status LEDs The status LEDs provide an indication of the functional status of the G5 Stack Switchgear. A more detailed status may be accessed via the G5 Operator Interface. 5.2.1. G5 Stack Switchgear Status LEDs The G5 Stack Switchgear has several LEDs that are used for displaying information about the status of the BMS.
Page 135: Determining Bms State From Led Status
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual LED (green) provides information on the G5 High-Voltage BMS state. BMS Activity This LED state combined with the Power, Fault and Link Activity LEDs states provide information on the G5 High-Voltage BMS state.
Page 136 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual BMS Activity Linkbus Power LED Fault LED State Indication Activity LED Network reset, restore factory firmware and Blinking Blinking configuration Document ID: NE-PM-011 Rev 1.7, 2024-07-26 Faraday Update 1...
Page 137: Using The Operator Interface
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5.3. Using the Operator Interface Launch the Operator Interface by opening the Nuvation-Energy-Operator-Interface.html file in your web browser. Browser Compatibility The Operator Interface currently supports the most recent versions of Mozilla Firefox ...
Page 138: Warnings And Faults
Before going into the details of the gauges and information presented in the dashboard, it is important to understand what a fault and a warning Nuvation Energy BMS status means. An ALL OK indicates that there are no faults or warning. This is the normal state for Nuvation Energy BMS.
Page 139: Stack Current
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5.3.1.3. Stack Current The stack current radial gauge shows the battery stack current as well as the maximum charge current limit and the maximum discharge current limit. The acceptable current range is visualized on the gauge by the blue arc.
Page 140: Cell Voltage
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual The Depth-of-Discharge radial gauge shows how much energy has been taken out of the battery stack. In an ideal Energy Storage System, defined as a system with no power losses, the amount of energy shown in this gauge needs to be added back into the battery stack to fill it back up to 100% State-of-Charge.
Page 141: Temperature
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5.3.1.7. Temperature The temperature bar gauge shows the maximum, minimum, and average cell temperature measurements within the stack. The high cell temperature and low cell temperature warning and fault threshold is visualized on the gauge with yellow and red segments.
Page 142: Nuvation Energy Bms Status
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5.3.1.8. Nuvation Energy BMS Status Nuvation Energy BMS status information contains information on the overall safety status of the battery stacks, the battery stack connection state, number of cells balancing, maximum charge current limit, maximum discharge current, and the time and date of the last update of the Dashboard.
Page 143 Stack Connected in a green oval indicates the battery stack is available to be charged or discharged. Clicking the Connect button initiates the stack connection sequence of events. Nuvation Energy BMS must be in the All OK state for the Connect button to be available.
Page 144: Last Update
BMS. The time and date is based on the local computer/tablet; it does not come from Nuvation Energy BMS. If the communication with a Nuvation Energy BMS is lost, a notification banner appears at the top of the display screen. The information shown on the Dashboard represents the last data received and is no longer recent.
Page 145: The Details Tab
5.3.2. The Details Tab The Details tab contains a much more detailed view into the status of Nuvation Energy BMS. The data values shown in this tab can be easily copied into a spreadsheet as a means of capturing the current state of Nuvation Energy BMS for manual data recording purposes.
Page 146: Contactor Life
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Information Table on the Dashboard. Figure 65. Battery accordion in Details Tab 5.3.2.2. Contactor Life The Contactor Life accordion contains values that track the life of contactors. See Contactor Life Tracking for further information.
Page 147: Safety
The ideal approach for determining measured capacity is to conduct a charge to FULL and a discharge to EMPTY calibration cycle. 5.3.2.4. Safety The Safety accordion contains a comprehensive list of all possible Nuvation Energy BMS faults, Document ID: NE-PM-011 Rev 1.7, 2024-07-26...
Page 148: Cell Voltages
Clicking on the Generate Report button at the bottom of this accordion will generate a safety report JSON file with a list of the Nuvation Energy BMS faults and warnings and their current state as well as the current firmware versions.
Page 149: Thermistor Temperatures
There is no differentiation between cells that are in the normal operating voltage range and cells that have triggered a Nuvation Energy BMS warning. There is also no indication of which particular cells are currently being balanced by the BMS.
Page 150: Open Wire
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 72. Thermistor accordion in Details Tab Filtering You can filter the display to highlight cells with temperatures above or below a value you specify. The values that match the criteria will be bolded and all other values will be faded.
Page 151: Resistance
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 75. Open Wire diagnostics accordion in Details Tab The diagnostic values displayed are ratios of Voltage. Values very close to one ( > 0.97) indicate a short condition. Values approaching zero (0.0 to 0.4) indicate an open wire connection.
Page 152 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 76. Resistance accordion in Details Tab Document ID: NE-PM-011 Rev 1.7, 2024-07-26 Faraday Update 1...
Page 153: The Menu Options
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5.3.3. The Menu Options The menu to the right of the Operator Interface provides access to tools and advanced options. Some of these options may be locked to prevent accidental changes.
Page 154: Exporting A Configuration File
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual The G5 High-Voltage BMS ships with a configuration file specific for its end  application. Serious problems might occur if the configuration settings are incorrectly modified. If you need assistance with modifying the configuration file, please contact support@nuvationenergy.com.
Page 155: Editing An Ip Address
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 3. Enter a suitable name for the stack 4. Click Apply  The Operator Interface automatically saves the label in persistent storage when applied.  A label does not handle spaces. Use hyphens or underscores to delineate words.
Page 156: Connection
Applying changes will disconnect the battery and restart the BMS. 5.3.3.3. Connection The connection page allows you to change the IP address and timeout of the Nuvation Energy BMS that you are trying to access. If you are connecting to a Nuvation Energy BMS that does not use the default IP address (192.168.1.21), you will need to change the connection settings in the Operator Interface to match...
Page 157: About
5.3.3.5. About This screen displays version details for the underlying software for your Nuvation Energy BMS. The name and number of the current software release are displayed at the top of the About screen. In the screenshot below, the release name is at the top in large blue letters. The version number following the release name has a format of yy.mm with yy representing the year and mm representing...
Page 158 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 80. Sample About Screen Document ID: NE-PM-011 Rev 1.7, 2024-07-26 Faraday Update 1...
Page 159: The Status Banner
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5.3.4. The Status Banner The banner at the top of the screen is used to indicate high level changes in system status. During typical operation nothing is displayed and this indicates the Operator Interface is communicating with the BMS and the BMS is fully operational with no major diagnostics problems.
Page 160: Understanding The Service Lockout And Self Check
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5.3.5. Understanding the Service Lockout and Self Check Service Lockout allows you to put your Nuvation Energy BMS into a Lockout state while you perform maintenance on your energy storage installation such as loading new configurations, or upgrading the firmware.
Page 161: Exiting Service Lockout
When in Service Lockout, you will not be able to access the Operator Interface dashboard. Shutdown Timer for G5 High-Voltage BMS To protect your batteries, the G5 High-Voltage BMS automatically shuts down after an hour of being in Service Lockout. If the Enable input is asserted,...
Page 162: Self Check
Check. 5.3.5.4. Self Check Troubleshooting If Nuvation Energy BMS fails its Self Check, you will receive an error notification. The reason for the failure is that some form of input to the Battery Management System was not received. This means that the Battery Management System was expecting some measurement (e.g.
Page 163: Communication Protocols
502 for read and write access. All register data is transmitted as big-endian (most significant byte first). The G5 High-Voltage BMS has separate regions of Modbus points to access the following data: 1. SunSpec Energy Storage Models as detailed in Section 5.4.1.2, “Implemented SunSpec Energy...
Page 164: Sunspec Energy Storage Models Structure And Nomenclature
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual is 40000. Table 51, “Common Model Points” describes the points of the Common Model as implemented in the BMS. A full description of the Common Model can be found in the SunSpec specification bundle.
Page 165 (0, 1, 2, …) to access the desired repeating block. For a single-stack Nuvation Energy BMS there is only one 803 repeating block. If a stack/string is configured in Nuvation Energy BMS software to be installed, then accessing its 803 repeating block will provide a valid Modbus response.
Page 166: Operational Cases For Sunspec Modbus Interface
All scale factors are fixed for a Model and do not change in value. 5.4.1.4. Operational Cases for SunSpec Modbus Interface There are two main operational cases for the control of Nuvation Energy BMS over its SunSpec interface: 1.
Page 167 External Controller Communicating Over SunSpec Modbus Interface An external controller typically polls Nuvation Energy BMS battery control points at a rate of 2–4 Hz. This controller reads data points required to manage current flow in the system. The following table summarizes the most important points an external controller may want to read from the BMS.
Page 168 16 bit range limit is reached. The clearing of alarms of Nuvation Energy BMS is accomplished by writing a value of 1 to the DERAlarmReset point. This point is erroneously identified as read-only in the SunSpec Energy Storage Models spreadsheet referenced earlier.
Page 169 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Model Block Point Name Address Scale Purpose Factor Fixed BConStrCt 40118 Number of stacks/strings with contactor closed Fixed BMaxCellVol 40119 Maximum cell voltage measured Fixed BMaxCellVolLoc 40120 Module/String location of maximum cell...
Page 170: Configurable Modbus
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5.4.1.5. Configurable Modbus The Modbus communication interface has been augmented with a new range of Modbus points. These points allow the mapping of BMS registers into read/write Modbus operations. The mapping of BMS registers to Modbus is accomplished by two different approaches.
Page 171 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Configuration The following BMS registers are used to configure the Configurable Modbus points and bulk map points. The Modbus Region ID is used from the prior Modbus holding register table to identify which different Modbus region the configuration applies to.
Page 172 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual sc_modbus_map[11].address = @stack_power.throughput_discharge_energy sc_modbus_map[12].address = @stack_power.charge sc_modbus_map[13].address = @stack_power.throughput_charge sc_modbus_map[14].address = @stack_power.throughput_discharge sc_modbus_map[15].address = @stack_cell_stat.max sc_modbus_map[16].address = @stack_cell_stat.min sc_modbus_map[17].address = @stack_cell_stat.avg sc_modbus_map[18].address = @stack_therm_stat.max sc_modbus_map[19].address = @stack_therm_stat.min sc_modbus_map[20].address = @stack_therm_stat.avg sc_modbus_map[21].address = @stack_current_limit.charge_current_disable...
Page 173: Accessing Sunspec Energy Storage Models
Common Model and the End Model has a numeric identifier as well as a length. A handy tool that can be used to explore the SunSpec Modbus registers for Nuvation Energy BMS is modpoll.exe. It is available for free download at http://www.modbusdriver.com/modpoll.html.
Page 174 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Communication..: 192.168.1.21, port 502, t/o 1.00 s, poll rate 1000 ms Data type.....: 16-bit register, output (holding) register table -- Polling slave... (Ctrl-C to stop) [40094]: 802 [40095]: 20 [40114]: -2...
Page 175: Fault/Warning/User Trigger Bitfields
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 5.5. Fault/Warning/User Trigger Bitfields Fault, warning and user defined triggers are aggregated to separate bitfield registers. Likewise there is a bitfield defined to identify the fault/warning/user triggers that are not initialized. This later data can be used to identify the cause(s) of why a BMS does not complete its Self Check.
Page 176: Fault Bit Mapping For Faraday Update 1
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Only a maximum of 63 bits are added to a bitfield. This limit is imposed to avoid the  case of 64 triggers being set which could be interpreted as an unimplemented point according to the SunSpec Modbus data models.
Page 177 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Bitfield Component Instance Mapped Component sc_bitfield_fault_triggered ssg_fault_cpu_register_self_test_wdt sc_bitfield_fault_triggered ssg_fault_clock_accuracy_test_wdt sc_bitfield_fault_triggered ssg_fault_afe_aggregate sc_bitfield_fault_triggered ssg_fault_afe_rom_bist_fresh_wdt sc_bitfield_fault_triggered ssg_fault_afe_ram_bist_fresh_wdt sc_bitfield_fault_triggered ssg_fault_afe_cpu_bist_fresh_wdt sc_bitfield_fault_triggered ssg_fault_afe_thermistor_bist_fresh_wdt sc_bitfield_fault_triggered ssg_fault_afe_adc_register_bist sc_bitfield_fault_triggered ssg_fault_afe_spi_cs_bist sc_bitfield_fault_triggered ssg_fault_afe_spi_data_bist sc_bitfield_fault_triggered ssg_fault_power_conn_temp_over sc_bitfield_fault_triggered ssg_fault_therms_wdt sc_bitfield_fault_triggered ssg_fault_power_conn_temp_consistency...
Page 178: Warning Bit Mapping For Faraday Update 1
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Bitfield Component Instance Mapped Component sc_bitfield_fault_triggered stack_fault_ci_therm_consistency sc_bitfield_fault_triggered ssg_fault_contactor_end_of_life sc_bitfield_fault_triggered ssg_fault_charge_current_over sc_bitfield_fault_triggered ssg_fault_charge_current_hi sc_bitfield_fault_triggered ssg_fault_discharge_current_hi sc_bitfield_fault_triggered ssg_fault_discharge_current_over sc_bitfield_fault_triggered ssg_fault_voltage_over sc_bitfield_fault_triggered stack_fault_cell_over sc_bitfield_fault_triggered stack_fault_cell_under sc_bitfield_fault_triggered stack_fault_discharge_current_over sc_bitfield_fault_triggered stack_fault_charge_current_over sc_bitfield_fault_triggered ssg_fault_bus_discharge_current_over sc_bitfield_fault_triggered ssg_fault_bus_charge_current_over...
Page 179: User Trigger Bit Mapping For Faraday Update 1
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Bitfield Component Instance Mapped Component sc_bitfield_warning_triggered stack_warn_discharge_therm_lo sc_bitfield_warning_triggered stack_warn_charge_therm_hi sc_bitfield_warning_triggered stack_warn_charge_therm_lo sc_bitfield_warning_triggered stack_warn_cell_hi sc_bitfield_warning_triggered stack_warn_cell_lo sc_bitfield_warning_triggered stack_warn_voltage_hi sc_bitfield_warning_triggered stack_warn_voltage_lo sc_bitfield_warning_triggered stack_warn_discharge_current_hi sc_bitfield_warning_triggered stack_warn_charge_current_hi sc_bitfield_warning_triggered stack_warn_cell_open_wire sc_bitfield_warning_triggered ssg_warn_contactor_end_of_life sc_bitfield_warning_triggered sc_warn_factory_backup_error sc_bitfield_warning_triggered sc_warn_bms_backup_error...
Page 180 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Bitfield Component Instance Mapped Component sc_bitfield_user_trig_triggered stack_trig_uvlo_combined sc_bitfield_user_trig_triggered stack_trig_therm_hi sc_bitfield_user_trig_triggered stack_trig_therm_lo sc_bitfield_user_trig_triggered ssg_trig_afe_stalled sc_bitfield_user_trig_triggered stack_trig_uvlo_cell_voltage sc_bitfield_user_trig_triggered stack_trig_uvlo_stack_voltage sc_bitfield_user_trig_triggered stack_trig_discharge_therm_hi sc_bitfield_user_trig_triggered stack_trig_charge_therm_hi sc_bitfield_user_trig_triggered stack_trig_discharge_therm_lo sc_bitfield_user_trig_triggered stack_trig_charge_therm_lo sc_bitfield_user_trig_triggered ssg_trig_afe_uptime_stalled sc_bitfield_user_trig_triggered ssg_trig_afe_thermistor_bist_update_sta lled sc_bitfield_user_trig_triggered...
Page 181: Preventative Maintenance
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 6. Preventative Maintenance Nuvation Energy G5 High-Voltage BMS contains no serviceable components. All internal components have been designed for long-life assuming the end-application operates the BMS within the stated Operational Limits.
Page 182: Contactor Life
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual • Ambient: ssg_ambient_therm[0].temperature or ssg_ambient_therm[0].temperature_float (for higher precision). • Fuse: ssg_fuse_therm[0].temperature ssg_fuse_therm[0].temperature_float (for higher precision). • Current Shunt: ssg_shunt_therm[0].temperature or ssg_shunt_therm[0].temperature_float (for higher precision). • Internal PCB: ssg_on_board_therm[x].temperature or ssg_on_board_therm[x].temperature_float (for higher precision) where x is 0 or 1, representing the two onboard thermistors.
Page 183 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual SoC value can be read from stack_soc[0].soc or Modbus point 40081. The measured usable capacity value will update if the BMS SoC reads 100%, then the system discharges to 0%, while the BMS remains powered on and not in Service Lockout. If the BMS is turned off or enters Service Lockout, the process will need to be restarted.
Page 184: Preparing For Battery Stack Servicing
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 7. Preparing for Battery Stack Servicing  The order of these steps must be followed in order to maximize the life of the components (the contactors in particular). 7.1. Disconnect Stack In order to service the stack (including the battery itself), perform the following steps: 1.
Page 185 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual treated as though they are energized. A simple voltage check (i.e. across the positive and negative terminals) is not always sufficient, especially with grounded battery stacks. It is recommended to also check for voltage between each conductor and ground.
Page 186: Troubleshooting
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 8. Troubleshooting 8.1. Faults and Self Check Failures During initial setup and usage of a Nuvation Energy BMS, there are two main classes of failures that prevent stack connection: 1. 'Self Check' failures 2.
Page 187: Self Check Issues
Link Bus cables are damaged. • Not enough cells are connected to the G5 Cell Interface. • Please refer to the Nuvation Energy G5 High-Voltage BMS: NUVG5 Datasheet on the minimum cell voltage required. 8.1.2. Stack Voltage Faults Stack Over Voltage | stack_fault_voltage_over ▪...
Page 188: Self Check Issues
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Stack Under Voltage | stack_fault_voltage_under ▪ Fault that is triggered when the stack voltage is below the under fault threshold. Voltage Sum Check | stack_fault_voltage_sum ▪ Fault that is triggered when the absolute difference between the measured stack voltage and sum of all cell voltages in the stack exceeds the fault threshold.
Page 189: Self Check Issues
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual 8.1.3.1. Self Check Issues All of the temperature measurements are communicated through over the Link Bus using the same mechanism as the cell voltages. Thus, the Self Check failures for the temperature measurements are exactly the same.
Page 190: Self Check Issues
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Pre-charge Over Current | stack_fault_precharge_over_current ▪ Fault that is triggered at any time during the pre-charge connection period if the stack current exceeds the fault threshold. 8.1.5.1. Self Check Issues These faults are directly related to the current faults detailed previously. Refer to Section 8.1.4.1,...
Page 191 ▪ ssg_fault_therms_wdt If these faults have tripped, the Nuvation Energy BMS can be configured to detect and recover the AFE subsystem before the above faults trip. This is accomplished by enabling the following triggers and setting their associated software watchdogs to expire before the fault software watchdogs expire.
Page 192: Self Check Issues
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Register Recommended Value 4000000 ssg_therms_fresh[0].period 4000000 ssg_afe_cpu_bist_fresh[0].period 4000000 ssg_afe_rom_bist_fresh[0].period 4000000 ssg_afe_ram_bist_fresh[0].period 4000000 ssg_afe_fresh[0].period 1000000 ssg_afe_uptime_watchdog[0].period 45000000 ssg_afe_thermistor_bist_update_watchdog[0].period 1000000 ssg_afe_cpu_bist_update_watchdog[0].period 2000000 ssg_afe_ram_bist_update_watchdog[0].period 2000000 ssg_afe_rom_bist_update_watchdog[0].period 1000000 ssg_afe_afe_update_watchdog[0].period 1250000 ssg_afe_temperature_update_watchdog[0].period 8.1.7.2. Self Check Issues All of these faults would have a Self Check failure if the AFE has a communication failure.
Page 193: Self Check Issues
Each register is a bitfield and any set bit represents a failed channel on the multiplexer test. 8.1.9.1. Known Issues The G5 High-Voltage BMS may not thermal throttle a cell’s balancing cycle while within the configured hysteresis temperature range for effective thermal management. This may cause the fault Document ID: NE-PM-011 Rev 1.7, 2024-07-26...
Page 194: Self Check Issues
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual sc_fault_ci_internal_temp_over to trigger. The workaround is to remove the ability to define a hysteresis temperature range and set the temperature range in which thermal throttling begins to a fixed temperature. This is done by setting the following registers to the same temperature.
Page 195: Self Check Issues
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Cell Interface Measurement Watchdog | stack_fault_ci_wdt ▪ Fault indicating G5 Cell Interface data has not been updated periodically for every installed G5 Cell Interface. Cell Open Wire Measurement Watchdog | stack_fault_open_wire_wdt ▪...
Page 196: Configuration Faults
Section 8.1.1.1, “Self Check Issues” for further details. The watchdog faults sc_fault_ram_test_wdt, sc_fault_rom_test_wdt, and sc_fault_factory_verify_wdt should always pass their Self Check as they are core to the Nuvation Energy BMS and should never fail Self Check. Please contact Nuvation Energy at support@nuvationenergy.com if you are experiencing these faults.
Page 197 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual stack_contactor.link_error and sc_gpi.link_error. Stack Switchgear Vcoil Over Voltage | ssg_fault_vcoil_voltage_over ▪ Fault indicating an Vcoil voltage that was larger than expected. Stack Switchgear Vcoil Voltage Range | ssg_fault_vcoil_voltage_range ▪ Fault indicating an Vcoil voltage was measured in an unexpected range.
Page 198: Self Check
Additionally the ssg_fault_temperature_short_shunt fault could also fail its a Self Check if the associated algorithm is not enabled (ssg_temperature_short_shunt_detector.enabled). Please refer the Nuvation Energy G5 High-Voltage BMS: Safety Manual for details on how to configure this fault properly for a G5 Stack Switchgear model.
Page 199: Netdiscover (Linux Only)
4. Either reboot the G5 High-Voltage BMS, or unplug/plug the Ethernet cable 5. The device address and MAC will show up in netdiscover once an ARP packet is sent 6. Once that is complete, update the PC network settings to match the G5 High-Voltage BMS and connect the Operator Interface.
Page 200 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Register Disconnect Mode Required Setting Quick stack_fault_contactor_feedback_fail.t Greater than or equal to stack_control.disconnect_delay ime_hyst Nominal ssg_fault_vcoil_state_mismatch.time_h Greater than or equal to stack_control.disconnect_delay -6000000 (minimum: 0) Nominal stack_fault_contactor_feedback_fail.t Greater than or equal to stack_control.disconnect_delay...
Page 201: Appendix A: Ordering Information
Switchgear fuse rating is determined by the application power profile, which is based on continuous power, cycle duration, and cycle frequency. A Nuvation Energy Application Engineer will assist with determining a suitable fuse rating when an order is placed. Table 69. Fuse rating and code...
Page 202: G5 Cell Interface
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual By default, the G5 Stack Switchgear ships with bracket NUVP-SSG-SB-B for shelf-mounting. The following mounting bracket options are available upon request. Table 70. Mounting Bracket Ordering Information Part Number Product Name...
Page 203: Appendix B: Mating Connectors
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Appendix B: Mating Connectors G5 Stack Switchgear Connectors Power and Fan Connector Molex 39-01-2105 Molex Manufacturer 39-01-2105 Housing Nylon UL94V-0 Housing material Circuits 39-00-0073 (Reel) Crimp terminal Wire gauge range 18–24 AWG stranded Table 72.
Page 204 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Samtec IPD1-10-D-K Samtec Incorporated Manufacturer IPD1-10-D-K Housing Nylon UL94V-0 Housing material Circuits CC79R-2024-01-L (Reel) Crimp terminal 20–24 AWG stranded Wire gauge range Table 73. I/O Connector Pin Assignment Connection Description Connected to Device...
Page 205: General Purpose Output
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Connection Description Connected to Device 19 GPI_ISO1_K Input detector 1 External equipment 20 GPI_ISO0_K Input detector 0 External equipment General Purpose Output The following diagram shows the internal circuit driving the GPO outputs. Refer to Section 5.1.1.1,...
Page 206: Enable Input
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual The following diagram shows the internal circuit receiving the Disconnect input. This feature allows an external dry-contact switch to notify the G5 Stack Switchgear to disconnect the battery from the DC bus.
Page 207: Shutdown Input
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Figure 88. Enable Input Equivalent Circuit Diagram Shutdown Input The following diagram shows the internal circuit receiving the Shutdown input. The Shutdown circuit must be controlled by a switch or relay that will assert the signal for a minimum of 0.5 seconds.
Page 208: Linkbus Connector
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual path within the G5 Stack Switchgear is rated for a maximum current of 1.5A which equals approximately 100 G5 Stack Switchgears. In practice, the limit will be the wire gauge size and global relay or switch, which must be rated to switch 24 VDC at 15mA times the number of G5 Stack Switchgears.
Page 209: Ethernet Connector
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Connection Description Connected to Device First G5 Cell Interface module in the Link Link Bus differential pair negative Bus chain First G5 Cell Interface module in the Link Link Bus differential pair positive...
Page 210: G5 Cell Interface Connectors
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual G5 Cell Interface Connectors Cell Voltage and Temperature Connector Samtec IPD1-21-D-K Manufacturer Samtec Incorporated Housing IPD1-21-D-K Housing material Nylon UL94V-0 Circuits Crimp terminal CC79R-2024-01-L (Reel) Wire gauge range 20–24 AWG stranded Samtec IPD1-21-D-K suggested wire: ...
Page 211: Link In Connector
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Connection Description Connected to Device TEMP8 External temperature probe input 8 10 kΩ NTC Thermistor #8 TCOM External temperature probe reference 10 kΩ NTC Thermistor #8 Connect to negative terminal of the lowest...
Page 212: Link Out Connector
<< Appendix C: Battery Topology Terminology Energy storage systems are hierarchical in nature. Nuvation Energy has adopted the following definitions for battery pack topology: Cell A Cell is the smallest unit of energy storage distinguishable by the Battery Management System.
Page 213 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Stack A Stack is one or more Groups connected in series. For example, five "14s2p" Groups connected in series could be described as a "5g14s2p" Stack. However, it is far more common to describe it as a "70s2p"...
Page 214: Appendix D: Best Practices
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Appendix D: Best Practices This section describes important concepts which need special attention to achieve a reliable installation. Excess Cable Management During the first prototype system build, it is possible to encounter cable lengths that are too long for your system.
Page 215: Physical Security
Below are some recommended best practices for the physical security of the products: ▪ Nuvation Energy products should be physically secured in a locked enclosure, room, or building to restrict access. This physically secured area will be referred to as the 'secure zone'.
Page 216: Inbound Protocols And Ports
Figure 93. Networking configuration for a Multi-Stack Controller with secure and internal network Inbound Protocols and Ports All the open ports listening on the G5 High-Voltage BMS with the network protocols are listed below. Document ID: NE-PM-011 Rev 1.7, 2024-07-26...
Page 217: Outbound Protocols
TCP Port 80 (HTTP) ▪ TCP Port 502 (Modbus) Outbound Protocols All Nuvation Energy products implement the essential outbound services for proper operation with modern networking equipment, listed below. Unless specified, the protocols are not encrypted or authenticated. ▪ Broadcast on network segment (ARP, STP) ▪...
Page 218: Appendix E: Bms Network Configuration
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Appendix E: BMS Network Configuration Nuvation Energy BMS is flexible and allows changing its network configuration if you need the IP address of Nuvation Energy BMS to match your existing network settings.
Page 219 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual From time to time Nuvation Energy will make updates to products in response to changes in available technologies, client requests, emerging energy storage standards, and other industry requirements. The product specifications in this document, therefore, are subject to change without notice.
Page 220: Registers
Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual Registers AFE Communication Timeout, sc_controller_wdt, period, 79, sc_fault_ci, 189, sc_fault_ci_auth, cell sc_fault_ci_internal_temp_over, installed, 66, sc_fault_ci_therm_mux_fail, Cell High Voltage, sc_fault_clocks, Cell Interface Measurement Check, sc_fault_config, Cell Interface Measurement Watchdog, sc_fault_config_factory, Cell Low Voltage,...
Page 221 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual sc_rom_test_wdt, ssg_fault_afe_ram_bist_fresh_wdt, sc_warn_controller_wdt, ssg_fault_afe_reset, 182, ssg_afe_afe_update_watchdog, 183, ssg_fault_afe_rom_bist_fresh_wdt, ssg_afe_configuration.enabled, 180, ssg_fault_afe_spi_cs_bist, ssg_afe_cpu_bist_fresh, ssg_fault_afe_spi_data_bist, ssg_afe_cpu_bist_update_watchdog, 183, ssg_fault_afe_thermistor_bist, ssg_afe_fresh, ssg_fault_afe_thermistor_bist_fresh_wdt, ssg_afe_ram_bist_fresh, ssg_fault_afe_wdt, ssg_afe_ram_bist_update_watchdog, 183, ssg_fault_bus_charge_current_over ssg_afe_rom_bist_fresh, thresh, ssg_afe_rom_bist_update_watchdog, 183, ssg_fault_charge_current_over ssg_afe_temperature_update_watchdog, 183, thresh,...
Page 222 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual ssg_on_board_therm Stack Switchgear AFE SPI Data BIST Error, temperature, Stack Switchgear AFE Thermistor BIST Failure, temperature_float, ssg_power_conn_therms Stack Switchgear AFE Thermistor BIST Watchdog, temperature, temperature_float, Stack Switchgear Clock Accuracy Test Watchdog,...
Page 223 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual connect_delay, 82, thresh, 75, disable_connecting, stack_fault_charge_therm_hi, disable_precharge, thresh, disconnect_delay, stack_fault_charge_therm_lo, precharge_delay, 81, thresh, precharge_max_current, 57, stack_fault_charge_therm_over, requested_state, thresh, stack_control.precharge_delay, stack_fault_charge_therm_under, stack_control.precharge_max_current, thresh, stack_control.voltage_mismatch_thresh, stack_fault_ci_therm_consistency, 189, stack_current_limit thresh, 112, attack_settling_time, 86, stack_fault_ci_wdt,...
Page 224 Nuvation Energy G5 High-Voltage BMS - NUVG5 Product Manual soc, stack_warn_charge_current_hi vempty, 62, thresh, vemptyavg, stack_warn_charge_therm_hi vfull, 63, thresh, vfullavg, stack_warn_charge_therm_lo stack_therm_poly thresh, coeff0, stack_warn_discharge_current_hi coeff1, thresh, coeff2, stack_warn_discharge_therm_hi coeff3, thresh, coeff4, stack_warn_discharge_therm_lo coeff5, thresh, coeff6, stack_warn_voltage_hi stack_trig_cell_hi thresh, thresh,...

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