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QC/T 897-2011 English PDF (QCT897-2011)

QC/T 897-2011 English PDF (QCT897-2011)

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QC/T 897-2011: Technical specification of battery management system for electric vehicles

This Standard specifies the terms and definitions, requirements, test methods, inspection rules and marking of the battery management system for electric vehicles. This Standard applies to the power battery management system for electric vehicles.
QC/T 897-2011
QC
Automotive Industry Standard
of the PEOPLE Republic of China
ICS 43.040
E 35
Technical Specification of Battery Management
System for Electric Vehicles
ISSUED ON. DECEMBER 20, 2011
IMPLEMENTED ON. JULY, 2012
Issued by. Ministry of Industry and Information Technology of the
People's Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Requirements ... 5
5 Test Method ... 10
6 Inspection rules ... 18
7 Marking ... 20
Annex A (Informative) Typical Charge-discharge Conditions of Battery System ... 21
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard was proposed by and shall be under the jurisdiction of the National Technical Committee of Auto Standardization.
The drafting organizations of this Standard. Tianjin Qingyuan Electric Vehicle Co., Ltd., China Automotive Technology & Research Center, Beijing Jiaotong University, Shenzhen BYD Auto Co., Ltd., Huizhou E-power Electronics Co., Ltd., Anhui LIGOO New Energy Technology Co., Ltd., Shanghai Motor Vehicle Inspection Certification & Tech Innovation Center, Shanghai H&D New Energy Co., Ltd., China North Vehicle Research Institute, China Electronics Technology Group Corporation No. 18 Institute, Beijing Institute of Technology, Shenzhen BAK Battery Co., Ltd., Jiangsu Chunlan Clean Energy Research Institute Co., Ltd., Chongqing Changan New Energy Automobile Co., Ltd. and Chery Automobile Co., Ltd..
The main drafters of this Standard. Zhao Chunming, Zhou Rong, Zhang Jianhua, Meng Xiangfeng, Xiao Chengwei, Wang Zidong, Wang Zhenpo, Ruan Xusong, Liu Xintian, Wen Feng, Liao Wenquan, Jiang Jiuchun, Zhou Xiaoming, Deng Xiaolei, Yuan Changrong and Li Qing.
Technical Specification of Battery Management
System for Electric Vehicles
1 Scope
This Standard specifies the terms and definitions, requirements, test methods, inspection rules and marking of the battery management system for electric vehicles. This Standard applies to the power battery management system for electric vehicles. 2 Normative References
The following documents are essential to the application of this standard. For dated references, only the dated editions apply to this standard. For undated references, the latest edition (including all amendments) applies to this standard.
GB/T 191-2008 Packaging - Pictorial Marking for Handling of Goods
GB/T 2423.4 Basic Environmental Testing Procedures for Electric and Electronic Products - Test Db. Damp Heat, Cyclic
GB/T 2423.17 Environmental Testing for Electric and Electronic Products - Part 2. Test Method-Test Ka. Salt Mist
GB/T 2423.22 Environmental Testing for Electric and Electronic Products - Part 2. Test Method - Test N. Change of Temperature
GB/T 17619 Limits and Methods of Testing for Immunity of Electrical/ Electronic Sub-assemblies in Vehicles to Electromagnetic Radiation
GB/T 19596 Terminology of Electric Vehicles
3 Terms and Definitions
For the purpose of this Standard, the following terms and definitions and those defined in GB/T 19596 apply.
3.1 Battery electronics
Battery connecting resistance more than connecting
resistance set value (or other equivalent determination
conditions)
Battery connection loose
4.2.6 Overvoltage operation
The battery management system shall be capable of operating normally at the supply voltage specified in 5.7, and shall meet the requirements of 4.2.3 for the accuracy for the measurement of the state parameters.
4.2.7 Undervoltage operation
The battery management system shall be capable of operating normally at the supply voltage specified in 5.8, and meet the requirements of 4.2.3 for the accuracy for the measurement of the state parameters.
4.2.8 High-temperature operation
The battery management system shall be capable of withstanding the high temperature operation test specified in 5.9, and shall be capable of normal operation during and after the test, and shall meet the requirements of 4.2.3 for the accuracy for the measurement of the state parameters.
4.2.9 Low-temperature operation
The battery management system shall be capable of withstanding the low temperature operation test specified in 5.10, and shall be capable of normal operation during and after the test, and shall meet the requirements of 4.2.3 for the accuracy for the measurement the state parameters.
4.2.10 Resistance to high temperature
The battery management system shall be capable of withstanding the high temperature test specified in 5.11, and shall be capable of normal operation after the test, and shall meet the requirements of 4.2.3 for the accuracy for the measurement of the state parameters.
4.2.11 Resistance to low temperature
The battery management system shall be capable of withstanding the low temperature test specified in 5.12, and shall be capable of normal operation after the test, and shall meet the requirements of 4.2.3 for the accuracy of the measurement of the state parameters.
4.2.12 Resistance to temperature changes
a) discharge at the current (1/3) A and terminate discharge after reaching one of the conditions as follows. the lower limit of the monomers (modules) of the battery system, the lower limit of the total voltage protection or the other discharge termination conditions specified in the manufacturer?€?s specifications;
b) allow to stand for 1 h;
c) charge at the constant current (1/3) A and terminate discharge after reaching one of the conditions as follows. the voltage of the monomers (modules) of the battery system reaching the upper limit or the other discharge termination conditions specified in the manufacturer?€?s specifications;
d) charge at the constant current and terminate discharge after reaching one of the conditions as follows. the charge current reducing to (1/3) A or charge at the constant current (1/3) A and terminate discharge after reaching one of the conditions as follows. the voltage of the monomers (modules) of the battery system reaching the upper limit or the other discharge termination conditions specified in the manufacturer?€?s specifications;
e) allow to stand for 1 h;
f) discharge in accordance with the same discharge specification as that specified in 5.5.2a) and record the total discharge amount Q01 during the discharge process.
g) allow to stand for 1 h;
h) repeat 5.5.2c) to 5.5.2 g). the discharge amounts are Q02 and Q03 respectively, and then the arithmetic mean value of the three discharge amounts is Q0. If the deviation between Q01, Q02 or Q03 and Q0 is less than 2% each, then Q0 is the available capacity of the battery system. If any deviation between Q01, Q02 or Q03 and Q0 is not less than 2%, then the available capacity test process is repeated until the discharge amounts for the three consecutive times meet the criteria for the available capacity verification.
Note. If the manufacturer has the recommended charge and discharge
specifications, it can be used directly in the available capacity test, replacing the relevant contents of 5.5.2 c) to 5.5.2 d) and 5.5.2 a) respectively, which shall be stated in the test report.
5.5.3 SOC Test.
5.5.3.1 The manufacturer can use the appropriate charge and discharge conditions in Annex A to conduct the test, in accordance with the type of complete vehicle for which the battery system is used, the battery charge and discharge rate and the test ambient temperature; and can select different charge and discharge conditions when 5.5.3.3 80% > SOC > 30%.
a) charge the battery system to a fully charged state in accordance with the charge specifications employed in the available capacity test;
b) allow to stand for 1 h;
c) discharge for 20 min at (1Q0) A;
d) allow to stand for 15 min;
e) conduct 10 cycles of testing under one of the discharge conditions in Annex A; f) allow to stand for 10 min;
g) record the SOC values reported by the battery management system;
h) discharge the battery system in accordance with the discharge specifications employed in the available capacity test, and record the discharge amount Q1; and
i) calculate the truth values of SOC in accordance with .
5.5.3.4 SOC ??? 30%.
a) charge the battery system to a fully charged state in accordance with the charge specifications employed in the available capacity test;
b) allow to stand for 1 h;
c) discharge for 40 min at (1Q0) A;
d) allow to stand for 20 min;
e) conduct 10 cycles of testing under one of the discharge conditions in Annex A; f) allow to stand for 10 min;
g) record the SOC values reported by the battery management system;
h) discharge the battery system in accordance with the discharge specifications employed in the available capacity test, and record the discharge amount Q1; and
i) calculate the truth values of SOC in accordance with .
Conduct the damp heat test for the battery man...

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