GB 43854-2024 Safety technical specification of lithium-ion battery for electric bicycle
1 Scope
This document specifies the electrical, mechanical and environmental safety requirements for lithium-ion cells and batteries for electric bicycles, and describes the corresponding test methods.
This document is applicable to lithium-ion cells and batteries for electric bicycles (hereinafter referred to as cells and batteries) specified in GB 17761.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 2423.4-2008 Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat, cyclic (12h+12h cycle)
GB/T 2423.18-2021 Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution)
GB/T 5169.5-2020 Fire hazard testing for electric and electronic products - Part 5: Test flames - Needle-flame test method - Apparatus, confirmatory test arrangement and guidance
GB/T 5169.16 Fire hazard testing for electric and electronic products - Part 16: Test flames - 50W horizontal and vertical flame test methods
GB/T 17626.2 Electromagnetic compatibility - Testing and measurement techniques - Electrostatic discharge immunity test
GB 17761 Safety technical specification for electric bicycle
GB/T 36945-2018 Vocabulary of lithium-ion batteries for electric bicycle
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 36945-2018 and the following apply.
3.1
rated capacity
value of the capacity of a cell or battery measured under specified conditions and rated by the manufacturer
[Source: GB/T 36945-2018, 4.6, modified]
3.2
cell
basic unit device that directly converts chemical energy into electrical energy
Note: Including electrodes, electrolyte, housing and terminals, and designed to be rechargeable.
[Source: GB/T 36945-2018, 2.1, modified]
3.3
battery
assembly composed of one or more cells and necessary components such as a housing, terminals, and protection devices
[Source: GB/T 36945-2018, 2.4, modified]
3.4
thermal runaway
phenomenon of an uncontrollable rise in cell temperature caused by the exothermic chain reaction of cells
[Source: GB 38031-2020, 3.14]
4 Symbols
For the purposes of this document, the following symbols apply.
C2: Rated capacity at 2-hour rate (Ah)
I2: Discharge current at 2-hour rate, which equals to 0.5C2 (A)
5 Safety requirements
5.1 Safety requirements for cell
5.1.1 Overcharge
After tested with the method specified in 6.3.1, the cell shall not catch fire or explode.
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Safety requirements
6 Test methods
7 Type test
Annex A (Normative) Flame retardance test method for wires
Bibliography
