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GB/T 31484-2015 (GB/T31484-2015)

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GB/T 31484-2015
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.120
T 47
Cycle life requirements and test methods for
traction battery of electric vehicle
ISSUED ON. MAY 15, 2015
IMPLEMENTED ON. MAY 15, 2015
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration 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 Symbols ... 6 
5 Requirements ... 6 
6 Test methods ... 7 
7 Inspection rules ... 18 
Foreword
This Standard is drafted based on the rules given in GB/T 1.1-2009.
This Standard was proposed by Ministry of Industry and Information Technology of the
People’s Republic of China.
This Standard shall be under the jurisdiction of National Technical Committee of Auto
Standardization (SAC/TC 114).
Drafting organizations of this Standard. No.18 Research Institute of China Electronics
Technology Group Corporation, China Automotive Technology & Research Center,
Tianjin Lishen Battery Co., Ltd., Chery New Energy Automotive Technology Co., Ltd.,
Technology Center of Shanghai Automotive Group Co., Ltd., China Faw Group
Corporation, Beijing Jiaotong University, Putian New Energy Co., Ltd., Shanghai
Motor Vehicle Inspection Center, Chongqing Changan New Energy Automobile Co.,
Ltd., Qoros Automotive Co., Ltd., China Automotive Engineering Research Institute
Co., Ltd., Beijing Institute of Technology, Heter Electronics Group Co., Ltd., Tianjin
Qingyuan Electric Vehicle Co., Ltd., Shanghai CENAT Energy Company Limited,
Dongfeng Nissan Passenger Vehicle Company (Dongfeng Motor Co., Ltd.), Shanghai
Volkswagen Automobile Co., Ltd., Guangzhou Honda Automobile Co., Ltd., Jiangsu
Chunlan Clean Energy Research Institute Co., Ltd., Guangdong Brunp Recycling
Technology Co., Ltd., Fujian Nebula Electronics Co., Ltd. AND Hunan Copower EV
Battery Co., Ltd.
Main drafters of this Standard. Xiao Chengwei, Wang Fang, Liu Shiqiang, Meng
Xiangfeng, Zhang Na, Liu Kewei, Zeng Xiangbing, Pei Xiaojuan, Wang Zhenpo, Jiang
Jiuchun, Wang Bei, Zhang Caiping, Shao Zhehai, Zhu Shunliang, Yuan Changrong,
Liu Peng, Wang Hongmei, Zhang Yongsheng, Yang Tao, Liu Zhen, Yu Jianjun, Wang
Qing, Peng Hanrui, He Xiangyun, Wang Hailan, Li Changdong, Kuang Dezhi, Zhang
Jingpeng AND Li Qing.
Cycle life requirements and test methods for
traction battery of electric vehicle
1 Scope
This Standard specifies the requirements, test methods, inspection rules of standard
cycle life and the test methods and inspection rules of operating-condition cycle life of
traction battery of electric vehicle.
This Standard is applicable to the traction battery installed in the electric vehicle
(hereinafter referred as “traction battery”).
2 Normative references
The following documents are indispensable for the application of this document. For
the dated reference documents, only the dated versions apply to this document. For
the undated reference documents, the latest versions (including all amendments)
apply to this document.
GB/T 2900.41 Electrotechnical terminology - Primary and secondary cells and
batteries
GB/T 19596 Terminology of electric vehicles
3 Terms and definitions
The following terms and definitions AND those specified in GB/T 2900.41 and GB/T
19596 apply to this Standard.
3.1
secondary cell
A basic unit device composed of electrode, membrane, electrolyte, case and terminal
which can directly transform chemical energy into power energy and be charged.
3.2
battery module
A power supply combination of one or more secondary cell(s) which are connected in
series or in parallel or both series and parallel with only one pair of positive and
negative output terminals.
3.3
battery pack
A unit usually consisting of battery module, battery management module (without
BCU), accumulator box and corresponding accessories, which can get electric energy
from the outside and output electric energy to the outside.
3.4
battery system
A energy storage equipment consisting of one or more than one battery pack(s) and
corresponding accessories (management system, high voltage circuit, low voltage
circuit, thermal management system, mechanical assembly, etc.).
3.5
rated capacity
The capacity (Ah) released FROM the time when fully charged traction battery is
discharged at the current of 1I1 (A) TO the time when it reaches to the final voltage
under room temperature.
3.6
rated energy
The energy (Wh) released FROM the time when fully charged traction battery is
discharged at the current of 1I1 (A) TO the time when it reaches to the final voltage
under room temperature.
3.7
initial capacity
The capacity (Ah) released FROM the time when fully charged power traction battery,
which is fresh from the factory, is discharged at the current of 1I1 (A) under room
temperature TO the time when it reaches to the terminal discharging condition as
specified by factory.
3.8
initial energy
The energy (Wh) released FROM the time when fully charged power traction battery,
which is fresh from the factory, is discharged at the current of 1I1 (A) under room
0.05I1 (A), stop charging. After charging, put it aside for 1 h (or less than 1 h as
specified by the manufacturer);
b) For the metal hydride nickel battery, charge it at the constant current of 1I1 (A)
for 1 h and then charge it at the constant current of 0.2I1 (A) for 1 h. After
charging, put it aside for 1 h (or less than 1 h as specified by the manufacturer).
6.1.1.4 Test method for capacity and energy.
a) DISCHARGE at 1I1 (A) current until it reaches to the discharge termination
condition specified by the manufacturer;
b) PUT it aside for 30 min or for the put-aside time specified by the manufacturer
(no longer than 60 min);
c) CHARGE according to the method in 6.1.1.3;
d) PUT it aside for 30 min or for the put-aside time specified by the manufacturer
(no longer than 60 min);
e) DISCHARGE at 1I1 (A) current until it reaches to the discharge termination
condition specified by the manufacturer;
f) CALCULATE the discharge capacity (in Ah) and discharge energy (in Wh) in step
e).
6.1.1.5 Method for adjusting SOC to the test target value n%.
a) CHARGE according to the method in 6.1.1.3;
b) PUT it aside for 30 min or for the put-aside time specified by the manufacturer
(no longer than 60 min);
c) DISCHARGE at constant current of 1Inl (A) for (100-n)/100 h.
6.1.1.6 Test method for power.
a) ADJUST SOC of test sample to 50% according to the method in 6.1.1.5;
b) PUT it aside for 30 min;
c) DISCHARGE at the maximum current specified by the manufacturer for 5 s.
After test, DISCHARGE at current of 1I1 (A) until it reaches to the discharge
termination condition specified by the manufacturer;
d) CALCULATE the power (W) of the last data collection point in step c).
6.1.1.7 In this Standard, tests for capacity and energy under room temperature (6.2)
and power under room temperature (6.3) are applicable to secondary cell, module or
system; standard cycle life (6.4) test is applicable to secondary cell or module; and
operating-condition cycle life (6.5) test is applicable to battery module or system.
6.1.1.8 The discharge current symbol of traction battery is positive; the charge current
symbol is negative.
6.1.2 Requirements for the precision of measuring instrument and apparatus
The precision of measuring instrument and apparatus shall meet the following
requirements.
- Voltage measuring device. not lower than 0.5 grade;
- Current measuring device. not lower than 0.5 grade;
- Temperature measuring device. ± 0.5°C;
- Time measuring device. ± 0.1%;
- Dimension measuring device. ± 0.1%;
- Mass measuring device. ± 0.1%.
6.2 Capacity and energy under room temperature (initial capacity and energy)
Under room temperature, test capacity and energy for 5 times according to the
method in 6.1.1.4. If the range of 3 continuous test results is lower than 3% of the
rated capacity, the test can be terminated in advance. TAKE the average value of the
last 3 tests results.
6.3 Power under room temperature (initial power)
Under room temperature, measure power according to the method in 6.1.1.6.
6.4 Standard cycle life
MEASURE standard cycle life according to the following procedures.
a) DISCHARGE at 1I1 (A) current until it reaches to the discharge termination
condition specified by the manufacturer;
b) PUT it aside for no less than 30 min or according to the put-aside condition
specified by the manufacturer;
c) CHARGE according to the method in 6.1.1.3;
d) PUT it aside for no less than 30 min or according to the put-aside condition
specified by the manufacturer;
e) DISCHARGE at 1I1 (A) current until it reaches to the discharge termination
used for hybrid el...
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Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.