GB/T 36945-2018 (English Version)

Standard No.: GB/T 36945-2018
Language: Chinese, Available in English version
Release Date: 2018
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 36945-2018

Scope: This standard specifies the general vocabulary of lithium-ion batteries for electric bicycles. This standard applies to lithium-ion batteries for electric bicycles.

Introduction

In-depth interpretation of the National Standard of the People's Republic of China GB/T 36945—2018

Background and significance of standard formulation

With the rapid development of the electric bicycle industry, lithium-ion batteries, as the core power source, have increasingly higher safety and performance requirements. GB/T 36945—2018 "Vocabulary of Lithium-ion Batteries for Electric Bicycles" came into being, aiming to unify industry terminology, standardize technical requirements, and provide a basis for product quality improvement and safety assurance.

This standard is managed by the National Bicycle Standardization Technical Committee and supported by the China Light Industry Federation, reflecting the combination of industry consensus and technological progress. By clarifying the key terms and definitions of lithium-ion batteries, this standard provides a unified language system for research and development, production and testing, which helps to improve the overall technical level of the industry.

Comparison of Standard Framework and Analysis of Core Clauses

Dimensions	GB/T 36945—2018	Comparison Standards	Difference Analysis
Term Definition	Specified the special terms for lithium-ion batteries for electric bicycles, such as "cell" and "battery".	GB/T 2900.41—2008 (General Battery Terminology)	Added professional terms for electric bicycle scenarios, filling the gap in the industry.
Technical Requirements	Specified key indicators such as rated capacity, cycle life, and safety performance of batteries.	GB 31241—2014 (Safety Standard for Lithium-ion Batteries)	Combined with the use scenarios of electric bicycles, the durability and safety requirements are refined.
Scope of Application	Specially for lithium-ion batteries for electric bicycles.	GB/T 28164—2011 (Safety Requirements for Portable Sealed Batteries)	Focusing on specific application scenarios, the standard is more targeted and applicable.

Terminology Analysis and Practical Applications

Case 1: The difference between a single cell and a battery pack

A single cell refers to a basic unit device that directly converts chemical energy into electrical energy, such as a cylindrical battery and a square battery. A battery pack is a system composed of multiple single cells, usually including a battery management system (BMS) to monitor and manage the battery status.

In practical applications, a battery pack is connected to external devices through a charging interface and a discharge interface to provide power for an electric bicycle. For example, in high-load riding scenarios, the BMS will adjust the current output in real time to ensure the safe operation of the battery pack.

Case 2: Handling leakage and rupture

Leakage refers to the leakage of electrolyte from the battery casing, usually caused by poor sealing or excessive internal pressure. Rupture refers to mechanical damage to the battery casing, resulting in the exposure of internal substances.

In actual use, manufacturers have effectively reduced the incidence of these two types of failures by optimizing the diaphragm design and strengthening the safety valve function. For example, a certain brand of electric bicycle batteries uses multi-layer protection technology, which significantly improves the durability and safety of the product.

Suggestions for the implementation of the standard

Manufacturers: Strictly follow the requirements of GB/T 36945-2018, optimize production processes, and ensure product quality.
Testing agencies: Establish testing laboratories that meet the standards and conduct comprehensive testing of products.
Industry organizations: Promote the dissemination of standards and promote collaboration between upstream and downstream industries.
Users: Strengthen battery use and maintenance training to extend product life.

GB/T 36945-2018 Referenced Document

GB 31241-2014 Lithium ion cells and batteries used in portable electronic equipments.Safety requirements
GB/T 19596-2017 Terminology of electric vehicles
GB/T 28164 Secondary cells and batteries containing alkaline or other non-acid electrolytes.Safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable application
GB/T 2900.41-2008 Electrotechnical terminology.Primary and secondary cells and batteries
GB/T 31485 Safety requirements and test methods for traction battery of electric vehicle

GB/T 36945-2018 history

2018 GB/T 36945-2018 Vocabulary of lithium-ion batteries for electric bicycle