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Table of Contents
Related Manuals for STW mBMS
Summary of Contents for STW mBMS
- Page 1 Hardware Guide...
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Page 2: Table Of Contents
Hardware Guide Table of content COPYRIGHT NOTICE ............................3 INTRODUCTION ............................4 ................................4 COPE ..............................5 OCUMENTS ............................... 5 ENERAL ULES OVERVIEW ..............................6 ..............................6 OPOLOGIES ............................7 EY COMPONENTS ..........................9 DDITIONAL COMPONENTS MOUNTING AND WIRING ..........................12 ....................... -
Page 3: Copyright Notice
Hardware Guide 1 Copyright Notice Copyright © 2016 Sensor-Technik Wiedemann GmbH All rights reserved. This User Manual and its content is copyright of Sensor-Technik Wiedemann GmbH - © Sensor-Technik Wiedemann GmbH 2016. All rights reserved. No part or all of the contents may be reproduced and used without the consent of Sensor- Technik Wiedemann GmbH other than the following: ... -
Page 4: Introduction
Communication via the ESS-CAN bus This document describes the 2nd generation of STW’s mBMS The term “vehicle” is used throughout this document, although the mBMS may be part of a high voltage battery system of a non-vehicle application. Created: W. Putz / F.-J. Schuster Page 4 of 28 Sensor-Technik Wiedemann GmbH, Am Bärenwald 6, 87600 Kaufbeuren, Tel.: 08341/95050, Fax: 08341/950555, www.sensor-technik.de... -
Page 5: Documents
Hardware Guide 2.2 Documents You can find the latest release of this document and related documents online: STW Cloud: https://cloud.sensor-technik.de/ Download area on www.sensor-technik.de Related documents include: mBMS Toolchain Guide ESS-CAN Matrix (in .dbc format and as an export in .xlsx format) ... -
Page 6: Overview
Lithium-ion batteries are the preferred energy storage system (ESS) for modern electric drive systems. The mBMS permits safe operation of lithium-ion batteries up to 800 volts. The mBMS supports various ESS topologies – single battery systems as well as multi battery systems for larger installations. -
Page 7: Key Components
Figure 2 shows the devices for a battery management system and their interconnection. This diagram can be found as a separate file in a larger format and higher resolution. The key components (marked green) can only be purchased from STW. The additional components (marked yellow) may be obtained from 3 parties. - Page 8 Hardware Guide PMB – Power Measurement Board / current sensor The PMB measures the current (shunt resistor) which flows in or out of the battery, the voltage value of the battery stack and the traction net. The PMB is equipped with a unique redundant safety circuit which enables the PMB to directly signal a current limit violation.
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Page 9: Additional Components
Hardware Guide 3.3 Additional components Main switches The main switches are connecting and disconnecting the power source or load to/from the battery. They must be able to interrupt the flowing current in short circuit situation to prevent uncontrollable situations. - Page 10 EPCOS 8016. If you use a different type, the look up table has to be adapted to the sensor used. The adaptions necessary on mBMS side are subject to a customer specific development. Please call STW for a commercial offer.
- Page 11 Hardware Guide Fuse / Service-Disconnect Pay attention to the following items for the selection of the fuse: Maximum system voltage (DC voltage) Maximum operating current Temperature derating Short circuit current (even at low cell temperatures) ...
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Page 12: Mounting And Wiring
Hardware Guide 4 Mounting and wiring Figure 3 – Wiring diagram Figure 3 shows the detailed interconnection of the devices. This diagram can be found as a separate file in a larger format and higher resolution. 4.1 Mounting electronic components... -
Page 13: Wire Dimensions
Hardware Guide 4.2 Wire dimensions Type of connector Wire gauge AWG24 – AWG20 0.205 mm² – 0.51mm² Micro-Fit AWG20 – AWG16 0.51 mm² – 1.31mm² AMPSEAL In order to make correct crimp contacts, it is highly recommended to use the crimp tools recommended by the supplier. -
Page 14: Achieving Emc Compliance
Hardware Guide Creeping distances Creeping distances for Creeping distances printed wiring material Insulation Material group Material group Material group All material groups except IIIb CTI ≥ 175 CTI ≥ 600 400 ≤ CTI < 600 100 ≤ CTI < 400 Basic insulation ≥... -
Page 15: Bms Configuration
(see chapter 5 for further information). Therefore, the role of the BMS has to be defined within the mBMS network. This is done by cable configuration in the low voltage interconnection. -
Page 16: Csc Configuration
§7 In order to adapt to geometrical restrictions or in order to optimize wiring, a CSC may be split mechanically into four separate modules and a controller board. The separation needs to be prepared and carried out by STW. The bus connections among the separated boards need to be carried out with twisted pair wires. - Page 17 Hardware Guide Example 1 CSC board has to sense 36 cells Related rules: §2, §5 For 36 cells, use the first three measuring modules on the CSC and leave the last one unconnected. can be removed 12 cells...
- Page 18 Hardware Guide Example 2 CSC has to sense 7 cells Related rules: §2, §3, §5 It is recommended to connect the unused cell voltage inputs of the CSC and the “UB”- Input. The UB connection has to be connected to the highest voltage of the module, here Cell 7+.
- Page 19 Hardware Guide Example 3 CSC board has to sense 13 cells Related rules: §2, §3, §5 Reduce the utilization to two measuring modules. This could be done in this manner: seven cells to the first module, six to the second. Do not connect less than four cells to one measuring board (the voltage level between pin 8 and 13 must be higher than 11V in any case.)
- Page 20 Hardware Guide Example 4 CSC board has to sense 12 cells (incl. temperature of each cell) Related rules: §2, §4, §5, §6 In early steps of battery system development, the developer wants to know the voltage and the temperature of each cell in the system. In further steps, the amount of sensors will be reduced.
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Page 21: Interlock
Hardware Guide 4.7 Interlock The BMS provides an interlock detector (DET) and generator (GEN) considering the requirements of the “LV123” specification. The generator can be disabled per software configuration if there is an external interlock signal generated by another system component. -
Page 22: Can-Interfacing
Hardware Guide 4.8 CAN-Interfacing On the LV-Connector there are four CAN busses using a baud rate of 500 kBit/s. CAN-Interface Channel Description termination on-board Interface to external systems (e.g. ESS-CAN CAN 1 SCU) Interface between the battery packs Interpack CAN... -
Page 23: Multi Battery Topologies
(SCU) – e.g. ESX from STW. The additional ECU has to coordinate the functions of the storage system with specific software relying on the functions and data provided by the individual batteries. - Page 24 CAN bus. Please note that sharing CAN busses among parallel batteries requires a customized CAN protocol in order to avoid collisions. STW is able to develop such a fully customized solution on your request. Call STW for a technical and commercial offer.
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Page 25: Technical Data
Hardware Guide 6 Technical Data 6.1 Maximum Ratings Interfaces LV (low voltage) Power supply 32 V (load dump capability at KL30: 58V) Interfaces HV (high voltage) max. time PMB1000 PMB2000 continuous 230 A 250 A 100 sec 390 A... - Page 26 2 x 2 A, low-side, 0 % … 100 % Digital output LSS short circuit protected, diagnostics (usable on customer spec. , ask STW for a commercial offer) 1 x 2 A, high-side, 0 % … 100 % Digital output HSS short circuit protected, diagnostics (usable on customer spec., ask STW for a commercial offer)
- Page 27 CAN1 Wake up options (options: CAN2, RTC and ignition (KL15) can be made available on customer spec., ask STW for a commercial offer) Power supply 8 ... 32 V DC 350 mA @ UB = 12 V (main switches off) Current ...
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Page 28: Terms And Abbreviations
ESD Electrostatic Discharge ESS Energy Storage System GEN Interlock Generator HV High Voltage LV Low Voltage mBMS STW's modul Battery Management System NTC Negative Temperature Coefficient Thermistors PCB Printed Circuit Board PMB Power Measurement Board - Current sensor SCU System Control Unit...
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