储能科学与技术 ›› 2018, Vol. 7 ›› Issue (6): 1135-1138.doi: 10.12028/j.issn.2095-4239.2018.0173

• 电池安全性专刊 • 上一篇    下一篇

浅析动力电池模组过充问题

汪承晔, 刘英泽, 罗志民, 金慧芬   

  1. 天津力神电池股份有限公司车载系统事业部, 天津 300384
  • 收稿日期:2018-09-03 修回日期:2018-09-20 出版日期:2018-11-01 发布日期:2018-10-19
  • 通讯作者: 汪承晔(1980-),男,本科,从事动力电池系统和模组的性能、安全等测试评价及相关研究工作,E-mail:ct102557@lishen.com.cn。
  • 作者简介:汪承晔(1980-),男,本科,从事动力电池系统和模组的性能、安全等测试评价及相关研究工作,E-mail:ct102557@lishen.com.cn。
  • 基金资助:
    国家自然科学基金项目（21771018，21701101）。

Analysis of overcharge problem of power battery module

WANG Chengye, LIU Yingze, LUO Zhimin, JIN Huifen   

  1. Tianjin Lishen Battery Joint-Stock Co., Ltd., Tianjin 300384, China
  • Received:2018-09-03 Revised:2018-09-20 Online:2018-11-01 Published:2018-10-19
  • Contact: 10.12028/j.issn.2095-4239.2018.0173

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摘要： 安全是锂离子电池广泛应用的基础，它贯穿着锂离子电池使用的整个生命周期，过充是影响锂离子电池安全的重要因素之一，如果发生过充时不能实现有效的保护，将会发生起火爆炸等安全事故。单电芯结构简单、散热好，可以通过其内部结构设计及电芯材料配方调整相对容易实现过充保护；电池包有电池管理系统（BMS）及高压控制器件，也容易实现过充保护；电池模组是介于电池包与电芯的中间层级，其安全是保证电池包安全的最后一道有力屏障，但由于模组结构相对复杂，散热比单电芯要差，其过充保护要难于电芯。本文通过分析电芯与模组过充保护的影响因素及区别，进行对应的试验验证，分析过充过程的电压、电流、温度等数据，找到影响模组过充保护的关键因素，制定对应的改善措施及方案，实现模组的过充安全保护。

关键词: 动力锂离子电池, 模组, 结构复杂, 过充, 安全

Abstract: Lithium-ion battery overcharging is a major safty issue in using, if it is not protected as overcharge occurs, there will be a safety accident such as fire and explosion. A single cell has simple structure and the heat dissipation is good, it can be easily protected by its internal structure design and battery material formulation adjustment. The battery pack has the battery management system (BMS) and high voltage control device, and it is easy to be protected from overcharge.The battery module is in the middle level between the battery pack and the cell, and its safety is the last powerful barrier to ensure the safety of the battery pack. However, the module structure is relatively complicated, the heat dissipation is relatively poor compared to the cell, and its overcharge protection is more difficult than the cell. By analyzing the influencing factors and differences of cell and module overcharge protection, carrying out test verification, analyzing the voltage, current, temperature and other of the overcharge process, the key factors affecting the overcharge protection of the module was found and formulate corresponding improvement measures and solutions was proposed to realize the overcharge safety protection of the module.

Key words: power Li-ion battery, module, complex structure, overcharge, safety

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