GB 44240-2024 English PDF - ESS Li-batteries standard
Secondary lithium cells and batteries used in electrical energy storage systems—Safety requirements
Standard Details
GB 44240-2024 (English Version)
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GB 44240-2024 (Chinese Version)
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Standard Introduction
This document specifies the safety requirements for lithium secondary cells and battery packs used in electrical energy storage systems, and describes the corresponding test methods.
This document applies to lithium secondary cells and battery packs for electrical energy storage systems (hereinafter referred to as cells and battery packs). Applications of electrical energy storage systems include but are not limited to the following:
a) Telecommunications;
b) Central emergency lighting and alarm systems;
c) Fixed engine starting;
d) Photovoltaic systems;
e) Large-capacity energy storage: grid-connected/off-grid.
The electrical energy storage systems listed above do not cover all applicable equipment; therefore, equipment not included may also fall within the scope of this document. The battery packs within the scope of this document usually have a rated energy of more than 100 kWh. For battery packs with a rated energy of 100 kWh or less, refer to GB 40165 for safety requirements.
Standard Catalog
The standard consists of the following main sections:
Foreword
Introduction
1 Scope
2 Normative References
3 Terms and Definitions
4 Test Conditions
4.1 Applicability of Tests
4.2 Environmental Conditions for Tests
4.3 Parameter Measurement Tolerances
4.4 Temperature Measurement Methods
4.5 Charge and Discharge Procedures for Testing
4.6 Type Tests
5 General Safety Requirements
5.1 General Safety Considerations
5.2 Safe Operating Parameters
5.3 Markings and Warning Instructions
5.4 Safety-Critical Components
6 Electrical Safety of Cells
6.1 High-Temperature External Short Circuit
6.2 Overcharge
6.3 Forced Discharge
7 Environmental Safety
7.1 Low Air Pressure
7.2 Temperature Cycling
7.3 Vibration
7.4 Acceleration Shock
7.5 Heavy Object Impact
7.6 Crush
7.7 Penetration (Simulation of Internal Short Circuit)
7.8 Thermal Abuse
7.9 Drop
8 Electrical Safety of Battery Pack Systems
8.1 Requirements for Battery Pack Management Unit/Battery Pack Management System
8.2 Test Samples
8.3 Overvoltage Charge Control
8.4 Overcurrent Charge Control
8.5 Undervoltage Discharge Control
8.6 Overheating Control
9 Other Requirements
9.1 Resistance to Abnormal Heat
9.2 Flame Retardancy
9.3 Electrical Insulation Inspection During Transportation and Installation
9.4 Short-Circuit Protection During Transportation and Installation
9.5 Reverse Connection Protection
9.6 Dielectric Strength of Battery Pack Systems
9.7 Thermal Runaway of Cells and Thermal Propagation of Battery Pack Systems
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