Connect Battery Cells Cable - Nuvation Energy NUV300-BC-12 Product Manual

4.4.2.1. Connection Procedure
Connect to Surface
It is recommended to use thermally conductive/electrically non-conductive epoxy to adhere the
thermistors to the cells.
Connect to Cell Interface
'Temperature' cable connects to the 'Temperature Sensors' port at the bottom of the Cell
Interface.

4.4.3. Connect Battery Cells Cable

The Battery Cells cable provides cell voltage input and a means for balancing the cells.
Power Requirements
Cells are connected as two groups and a minimum of 11 V must be present between the most
negative and most positive cells of each group.
4.4.3.1. Connection Procedure
Connect to Cells
Connect the cables wires to the battery voltage sense leads. The individual wires are labelled to
help with identifying the connections. Verify the cell voltages present on the connector are correct.
While the Cell Interface module is tolerant of most wiring errors, incorrect connections may cause
the cells to discharge.
Refer to the wiring examples below for the specific Cell Interface module used.
Connect to Cell Interface
'Battery Cells' cable connects to the 'Battery Cells' port at the bottom of the Cell Interface.
4.4.3.1.1. Safety Considerations
The Low-Voltage BMS module's I/O ports (e.g. Ethernet, CAN,
Link Out) are SELV (Safety Extra Low Voltage) rated to 60 V. For example, a system using more than
16 cells of 2V lead-acid could exceed the 60 V maximum of the Low-Voltage BMS module during the
equalization phase of the charge profile.
To maintain the SELV rating of the Low-Voltage BMS I/O ports, the negative terminal of the battery
stack must be connected to earth ground. This prevents high voltage from propagating out of the I/O
ports in the very unlikely event of an internal failure with the current shunt interface. This
requirement also means that any device connected to the Low-Voltage BMS must reference its signals
to earth ground, as any signal referenced to the top of the battery stack would exceed the 60 V limit
of the Low-Voltage BMS.
4.4.3.1.2. Battery Cell Connector for Cell Interface - 12 channel
Document ID: NE-PM-002
Nuvation Energy Low-Voltage BMS - Product Manual
RS485 / Modbus
41
RTU, Control / GPIO,
Rev 1.2, 2021-03-03
Curie Update 1