GB 38031-2020 Electric vehicles traction battery safety requirements English
Electric vehicles traction battery safety requirements
1 Scope
This standard specifies the safety requirements and test methods for secondary cell, pack or system of traction battery (hereinafter referred to as battery) of electric vehicles.
This standard is applicable to rechargeable electrical energy storage devices such as lithium-ion battery and NI-MH battery for electric vehicles.
2 Normative references
The following referenced documents are 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 2423.4 Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat, cyclic (12h+12h cycle)
GB/T 2423.17 Environmental testing for electric and electronic products - Part 2: Test methods - Test Ka: Salt mist
GB/T 2423.43 Environmental testing for electric and electronic products - Part 2: Test methods - Mounting of specimens for vibration, impact and similar dynamic tests
GB/T 2423.56 Environmental testing - Part 2: Test methods - Test Fh: Vibration, broad-band random and guidance
GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)
GB/T 19596 Terminology of electric vehicles
GB/T 28046.4-2011 Road vehicles - Environmental conditions and testing for electrical and electronic equipment - Part 4: Climatic loads
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 19596 and the following apply.
3.1
secondary cell
basic unit device that converts the chemical energy and electric energy mutually
Note: it generally includes electrode, diaphragm, electrolyte, housing and terminal, and is also designed to be rechargeable.
3.2
battery module
an assembly composed of two or more secondary cells in series connection, parallel connection or combination thereof, which is used as a power supply
3.3
battery pack
unit which is capable of obtaining external electric energy and outputting electric energy outwards
Note: it generally includes secondary cell, battery management module (excluding BCU), battery compartment and corresponding accessories (cooling components, connecting cables, etc.).
3.4
battery system
energy storage device consisting of one or more battery pack(s) and corresponding accessories (management system, high voltage circuit, low voltage circuit, mechanical assembly, etc.)
3.5
battery electronics
electronic device collecting or simultaneously monitoring the electric and thermal data of battery pack
Note: the battery electronics may include a cell controller and the electronic components for equalization of secondary cells. The equalization between secondary cells may be controlled by the battery electronics or battery control unit.
3.6
battery control unit
electronic device controlling, managing, detecting, or calculating relevant electric and thermal parameters of the battery system and providing communication between the battery system and other vehicle controllers
3.7
rated capacity
capacity of secondary cell, battery module, battery pack or system declared by the manufacturer after measurement under the conditions specified by the manufacturer
Note: generally, the rated capacity is expressed in Ah or mAh.
3.8
practical capacity
capacity released from a fully charged secondary cell, battery module, battery pack or system under the conditions specified by the manufacturer
3.9
state-of-charge
percentage of capacity which may be released by the current secondary cell, battery module, battery pack or system under the discharge conditions specified by the manufacturer in respect of the practical capacity
