Traction battery of electric earth-moving machinery - Part 2: Electrical performance requirements
1 Scope
This document specifies the electrical performance requirements for cells, packs, or systems of traction battery of electric earth-moving machinery, and describes the relevant test methods.
This document is applicable to the manufacturing of traction lithium-ion batteries of electric earth-moving machinery, and may also serve as a reference for the manufacturing of other types of traction batteries.
2 Normative references
The following documents contain requirements 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 of the referenced document (including any amendments) applies.
GB/T 10592 Specifications for high/low temperature testing chambers
GB/T 44254 Electric earth-moving machinery - Terminology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 44254 and the following apply.
3.1
electric earth-moving machinery; EEMM
earth-moving machinery whose operating energy is entirely or partially provided by electrical energy
Note 1: Operating energy refers to the energy required for the operation of earth-moving machinery, including energy input, energy output, and intermediate energy conversion processes.
Note 2: The electrical energy comes from airborne rechargeable energy storage systems, fuel cells, generator devices, external wirings, or other external energy storage devices, etc.
[Source: GB/T 44254-2024, 3.1.1]
3.2
high energy battery
traction battery characterized by high energy density and mainly used for high energy output
Note: At room temperature, the ratio of the maximum allowable electric power output (W) to the 3I3 discharge energy (Wh) is less than 10.
[Source: GB/T 44254-2024, 3.2.1.1.3]
3.3
high power battery
traction battery characterized by high power density and mainly used for instantaneous high power output and input
Note: At room temperature, the ratio of the maximum allowable electric power output (W) to the 1I1 discharge energy (Wh) is less than 10.
[Source: GB/T 44254-2024, 3.2.1.1.2]
3.4
rated capacity
capacity (Ah) measured at a discharge current of 1I3 for high energy battery and 1I1 for high power battery and declared by the manufacturer after being fully charged at room temperature
[Source: GB/T 44254-2024, 3.4.2.3]
3.5
rated energy
energy (Wh) measured at a discharge current of 1I3 for high energy battery and 1I1 for high power battery and declared by the manufacturer after being fully charged at room temperature
[Source: GB/T 19596-2017, 3.3.3.5.3, modified]
3.6
initial capacity
discharge capacity (Ah) of the newly-manufactured traction battery when it is fully charged at room temperature, and is discharged to the discharge termination condition specified by the manufacturer with the current of 1I3 for high energy battery and 1I1 for high power battery
[Source: GB/T 44254-2024, 3.4.2.4]
4 Symbols and abbreviations
4.1 Symbols
For the purposes of this document, the following symbols apply.
I1: 1h rate discharge current (A), which is equal to the rated capacity.
I3: 3h rate discharge current (A), which is equal to 1/3 of the rated capacity.
4.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
FS: full scale
Contents
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Technical requirements
6 Test conditions
7 Test methods
Annex A (Informative) Tooling for high and low temperature test chamber
Annex B (Informative) Test procedures
Bibliography
Figure A.1 Schematic diagram for tooling
Figure A.2 Schematic diagram for tooling application
Table B.1 Test procedures
