GB/T 33598.3-2021Recovery of traction battery used in electric vehicle - Recycling - Part 3: Specification for discharging (English PDF)

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020 “Directives for standardization — Part 1: Rules for the structure and drafting of standardizing documents”.

This document is Part 3 of GB/T 33598. The following parts of GB/T 33598 have already been issued:

— Recovery of traction battery used in electric vehicle — Dismantling specification (GB/T 33598);

— Recovery of traction battery used in electric vehicle — Recycling — Part 2: Material recovery requirements (GB/T 33598.2);

— Recovery of traction battery used in electric vehicle — Recycling — Part 3: Specification for discharging (GB/T 33598.3).

Attention is drawn to the possibility that some of the content of this document may be the subject of patent rights. The issuing body of this document bears no responsibility for identifying such patent rights.

This document was proposed by the Ministry of Industry and Information Technology of the People’s Republic of China.

This document is under the jurisdiction of the National Technical Committee of Auto Standardization (SAC/TC 114).

Drafting organizations: Guangdong Brunp Recycling Technology Co., Ltd.; China Automotive Technology and Research Center Co., Ltd.; Hunan University; GEM Co., Ltd.; Tianjin Saidemei New Energy Technology Co., Ltd.; Shanghai Baolong Automotive Corporation; GEM (Wuhan) City Mineral Recycling Industrial Park Development Co., Ltd.; Changsha Research Institute of Mining and Metallurgy Co., Ltd.; Hefei Gotion High-tech Power Energy Co., Ltd.

Main drafters: Yu Haijun, Zhang Tongzhu, Zhang Xuemei, Wei Qiong, Hou Peng, Zhang Yuping, Li Changdong, Li Qianjin, Zhao Xiaoyong, Li Zhongyang, Liu Jingrong, Huang Liangqu, Wu Benben, Song Qi, Xie Yinghao, Li Hua, Xu Mao.

Introduction

When the remaining capacity of a traction battery falls to 80 % of its nominal capacity it can no longer meet the requirements of an electric vehicle. Once the battery has been scrapped from the vehicle it still holds a high residual charge, and irregular discharging during recycling readily leads to safety and environmental accidents. Ensuring that retired traction batteries are discharged safely, cleanly and efficiently — while the personal safety and the property of the operator are protected — is therefore necessary.

Although discharging processes and methods differ, the methods used in China fall mainly into the external circuiting method and the soaking method. Which discharging method to use for a waste traction battery, what the discharging process is to satisfy, and how the cut-off condition is judged are the key technical questions of a discharging specification.

Because the recycling of traction batteries raises many technical questions and involves many parties with differing needs, GB/T 33598 “Recovery of traction battery used in electric vehicle — Recycling” is intended to consist of 4 parts:

— Part 1: Dismantling specification. Intended to standardize the operating requirements for dismantling waste traction batteries, so that the operation is safe, clean and efficient.

— Part 2: Material recovery requirements. Intended to guide recycling enterprises in the efficient recovery of valuable metal elements and in pollution control.

— Part 3: Specification for discharging. Intended to select an applicable discharging method and to improve discharging efficiency while safety is ensured.

— Part 4: Recovery and treatment report. Intended to establish the framework and the format of the report that supports traceability management of waste batteries, and to standardize the necessary clauses.

GB/T 33598.3 is of significance for the scientific, safe and environmentally sound discharging of traction batteries during recycling.

1 Scope

This document specifies the terms and definitions, the basic requirements, the selection of the discharging process and the discharging methods, the storage requirements and the environmental protection measures for the discharging stage of traction battery recovery and recycling.

This document applies to the discharging process in the recycling of retired lithium-ion traction batteries used in vehicles.

2 Normative references

The contents of the following documents constitute indispensable provisions of this document through normative reference in the text. For dated references, only the edition corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 8196 Safety of machinery — Guards — General requirements for the design and construction of fixed and movable guards · GB 8978 Integrated wastewater discharge standard · GB/T 11651 Code of practice for selection of personal protective equipment · GB 15630 Specifications for setting of fire safety signs · GB 16297 Integrated emission standard of air pollutants · GB 18918 Discharge standard of pollutants for municipal wastewater treatment plant · GB/T 19596 Terminology of electric vehicles · GB/T 23821 Safety of machinery — Safety distances to prevent hazard zones being reached by upper and lower limbs · GB/T 29090 Method of sampling for battery scrap · GB/T 33598 Recovery of traction battery used in electric vehicle — Dismantling specification · GB/T 34014 Automotive traction battery coding rules · GB 38031 Electric vehicles traction battery safety requirements · GB 50140 Code for design of extinguisher distribution in buildings · WB/T 1061 Specification for waste battery recycling management

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 19596 and GB 38031 and the following apply.

4 Basic requirements