GB/T 31467.2-2015 PDF in English
GB/T 31467.2-2015 (GB/T31467.2-2015, GBT 31467.2-2015, GBT31467.2-2015)
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[Replaced by GB/T 31467-2023] Lithium-ion traction battery pack and system for electric vehicles -- Part 2: Test specification for high energy applications
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Standards related to: GB/T 31467.2-2015
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GB/T 31467.2-2015: PDF in English (GBT 31467.2-2015) GB/T 31467.2-2015
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.080
T 47
Lithium-ion traction battery pack and system for electric
vehicles - Part 2. Test specification for high energy
applications
(ISO 12405-2.2012, Electrically propelled road vehicles - Test specification for
lithium-ion traction battery packs and systems - Part 2. High-energy
applications, NEQ)
ISSUED ON. MAY 15, 2015
IMPLEMENTED ON. MAY 15, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Symbols and abbreviated terms ... 6
5 General requirements ... 6
6 Common test cycle ... 9
7 Basic performances ... 10
Appendix A ... 22
Appendix B ... 24
Foreword
GB/T 31467 " Lithium-ion traction battery pack and system for electric vehicles"
consists of the following 3 parts.
- Part 1. Test specification for high power applications;
- Part 2. Test specification for high energy applications;
- Part 3. Safety requirements and test methods.
This Part is the second part of GB/T 31467.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part uses redrafting method to modify and adopt ISO 12405-2.2012
"Electrically propelled road vehicles - Test specification for lithium-ion traction
battery packs and systems - Part 2. High-energy applications", and is non-
equivalent to ISO 12405-2.2012.
This Part was proposed by Ministry of Industry and Information Technology of
the People's Republic of China.
This Part shall be under the jurisdiction of National Technical Committee on
Road Vehicles of Standardization Administration of China (SAC/TC 114).
The drafting organizations of this Part. China Automotive Technology and
Research Center, 18th Institute of China Electronics Technology Group
Corporation, Tianjin Lishen Battery Joint-Stock Co., Ltd., Technical Center of
Shanghai Automotive Group Joint-stock Limited Corporation, Chongqing
Changan New Energy Automobile Co., Ltd., China North Vehicle Research
Institute, BYD Automobile Industry Co., Ltd., Chery New Energy Automobile
Technology Co., Ltd., Beijing Jiaotong University, Huizhou City Billion
Electronics Co., Ltd., Putian New Energy Co., Ltd., Harbin Guangyu Power Co.,
Ltd., Hefei Guoxuan High-tech Power Energy Co., Ltd, Shanghai Volkswagen
Automotive Co., Ltd, Guangdong Sophisticated Energy Limited, and Shanghai
Kanai Energy Co., Ltd.
Main drafters of this Part. Wang Fang, Xiao Chengwei, Liu Shiqiang, Meng
Xiangfeng, Zhang Na, Gao Hongbo, Jiang Jiuchun, Jiang Wenfeng, Lu Kewei,
Shao Zhehai, Xu Xingwu, Yuan Changrong, Liu Zhen, Wen Feng, Ruan Xusong,
Zeng Xiangbing, Wang Zhanguo, Yang Congjiao, Ma Lishuang, Wu Zhiqiang,
Zhang Caiping, and He Xiangyun.
Lithium-ion traction battery pack and system for
electric vehicles - Part 2. Test specification for high
energy applications
1 Scope
This Part of GB/T 31467 specifies test procedures for lithium-ion battery packs
and systems specially developed for electric vehicles.
This Part applies to lithium-ion traction battery pack and system that is loaded
on electric vehicles and for the purpose of high energy applications. Ni-MH
traction battery packs and systems of high energy applications may refer to this
Part.
2 Normative references
The following referenced document is indispensable for the application of this
document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 19596 Terminology of electric vehicles
3 Terms and definitions
Terms and definitions defined in GB/T 19596 and the following ones are
applicable to this document.
3.1 Battery electronics
Electronic device that collects and possibly monitors thermal and electric data
of batteries or battery assemblies, and contains electronics for cell balancing, if
necessary.
NOTE The battery electronics may include a battery controller. The functionality of
battery balancing may be controlled by the battery electronics or it may be controlled by
the BCU.
3.2 Battery control unit. BCU
3.11 Low voltage
The voltage of which the maximum working voltage is not greater than 30 V a.c.
(rms) OR is not greater than 60 V d.c.
4 Symbols and abbreviated terms
The following symbols and abbreviated terms apply to this document.
n C current rate equal to n times the one hour discharge capacity
expressed in ampere
(SOC, T, t) maximum continuous charge current of a SOC, at test ambient
temperature T, in pulse duration time t
Imax(T) maximum continuous charge current at a test ambient temperature
η efficiency
RT room temperature
SOC state of charge
5 General requirements
5.1 General conditions
5.1.1 If not otherwise specified in certain specific test projects, the test shall be
conducted at RT of 25°C±2°C and of which the humidity is 15%~90%.
5.1.2 The necessary documentation for operation and needed interface parts
for connection to the test equipment (i.e. connectors, plugs including cooling)
shall be delivered, and the typical structure of battery pack and system refers
to Appendix A. Manufacturer needs to provide operating limits of battery pack /
system, so as to ensure the security of the entire testing process.
5.1.3 When test target ambient temperature changes, test sample needs to
complete the process of adaptation to the environment before test starts. place
it at low temperature for not less than 24h; at high temperature for not less than
16h; or temperature difference between cell ambient temperature and target
temperature shall not exceed 2°C. If test sample contains BCU, it needs to turn
it off during environment adaption.
5.1.4 If battery pack or system is not suitable for some tests due to reasons like
size or weight, etc., it shall use subsystem of battery pack or battery system as
test sample after agreed by both parties for all or some tests. However, this
subsystem shall contain all parts related to vehicle requirements.
5.1.5 The method of adjusting SOC to test target value n%. charge battery pack
or system according to charging method provided by the manufacturer, place it
for 1h and discharge constant current at 1C discharge rate at (100-n)/100h.
After each SOC adjustment, place test sample for 1h before new test starts.
5.1.6 During the test, test sample needs placing for a certain of time between
some test procedures for equilibration between internal reaction of battery pack
or system and temperature. During the placement, low-voltage electronic
control unit of battery pack or system shall work as usual, e.g., battery electronic
component and BCU; cooling system shall work according to manufacturer’s
provisions or BCU orders.
5.1.7 The discharge rate during the test shall be in accordance with the
provisions in this Part. Charging mechanism and cut-off conditions of
discharging shall be provided by the manufacturer. However, these conditions
shall be unified, for example, charging mechanism and discharging mechanism
during cycle performance test shall be same with the provisions of other tests.
5.1.8 Rated capacity of battery pack or system has an important influence on
the testing process. If absolute difference between actual available capacity of
battery (7.1.2.2) and battery rated capacity exceeds 5% of rated capacity, it
shall be clearly stated in the test report, and replace rated capacity by actual
available capacity, as the reference to calculation of charge and discharge
current, and SOC.
5.1.9 Test items, test methods clause number, test conditions for battery pack
and system are shown in Appendix B.
5.1.10 Battery discharge current sign is positive while charge current sign is
negative.
5.2 Accuracy requirements
5.2.1 The accuracy of measuring instruments and meters shall be within the
following tolerances.
- Voltage measuring device. not less than Grade 0.5;
- Current measuring device. not less than Grade 0.5;
- Temperature measuring device. ± 0.5°C;
- Time measuring device. ± 0.1%;
- Size measuring device. ±0.1%;
test bench shall be able to control the testing process based on battery state
and operating limits. Detect battery system current, voltage, capacity, or energy
by test bench which shall be regarded as detection result and calculation
reference. Parameters uploaded by battery system shall not be regarded as
test result or test reference.
5.4.3 Mass and volume of test sample
Use measuring tool to measure dimensions of test sample. Calculate test
sample’s volume, in L. Use weighing apparatus to measure test sample’s mass,
in kg. If test sample contains forced cooling system, it shall be included such as
cooling circuit when measuring or calculat...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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