储能科学与技术 ›› 2018, Vol. 7 ›› Issue (6): 1120-1127.doi: 10.12028/j.issn.2095-4239.2018.0168

• 电池安全性专刊 • 上一篇    下一篇

循环老化对锂离子电池在绝热条件下的产热及热失控影响

毛亚1, 白清友1, 马尚德1, 周罗增1, 郭瑞1, 郑耀东2, 雷博3, 解晶莹1,4   

  1. 1. 上海空间电源研究所, 空间电源技术国家重点实验室, 上海 200245;
    2. 中国南方电网有限责任公司, 广东 广州 510063;
    3. 南方电网科学院有限责任公司, 广东 广州 510063;
    4. 上海动力与储能电池系统工程技术研究中心, 上海 200245
  • 收稿日期:2018-08-31 修回日期:2018-09-19 出版日期:2018-11-01 发布日期:2018-10-19
  • 通讯作者: 解晶莹,博士,研究员,研究方向为化学电源相关先进材料、电池及系统设计,E-mail:jyxie@mail.sim.ac.cn。
  • 作者简介:毛亚(1987-),女,博士,高级工程师,研究方向为锂离子电池安全性研究,新体系化学电源,E-mail:maoya0106@163.com
  • 基金资助:
    国家重点研发计划项目（2018YFB0905300）。

Influence of cycling on the heat-release and thermal runaway of the lithium ion battery under adiabatic condition

MAO Ya1, BAI Qingyou1, MA Shangde1, ZHOU Luozeng1, GUO Rui1, ZHENG Yaodong2, LEI Bo3, XIE Jingying1,4   

  1. 1. State Key Laboratory of Space Power Source Technology, Shanghai Institute of Space Power-sources, Shanghai 200245, China;
    2. China Southern Power Grid, Guangzhou 510063, Guangdong, China;
    3. Electric Power Research Institute, China Southern Power Grid, Guangzhou 510063, Guangdong, China;
    4. Shanghai Engineering Center for Power and Energy Storage Systems, Shanghai 200245, China
  • Received:2018-08-31 Revised:2018-09-19 Online:2018-11-01 Published:2018-10-19
  • Contact: 10.12028/j.issn.2095-4239.2018.0168

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摘要： 随着锂离子电池能量、寿命的提升，对安全性需求也越来越高，温度对电池的寿命和安全有着重要影响。以钴酸锂/中间相碳微球体系电池为研究对象，采用加速量热仪研究了不同工作电流、不同循环老化周期电池的产热特性和热失控行为，电池的发热量随着充放电倍率的增加而增大。通过比较不同循环老化周期电池的产热速率，发现容量衰减速度与直流内阻、产热量之间存在很强的关联性。从热失控行为研究发现，自放热起始温度为105.4℃，随后发生连续自放热，直到温度达到149.7℃热失控起始温度，发生内短路，最终导致电池热失控。循环后电池的热失控过程中自放热和热失控起始温度稍有变化，热失控时间大大缩短。

关键词: 锂离子电池, 产热, 热失控, 循环老化, 绝热条件

Abstract: With the development of lithium-ion batteries, the demand for safety is critical, and temperature has an important influence on the life and safety. LiCoO2/C is taken as the object, and the heat generation and thermal runaway behavior at different cycle are studied under different current by using accelerating rate calorimeter. Comparing the heat generation of the batteries at different cycle, it is found that there is a strong correlation between the rate of capacity decay, DC resistance and the heat generation rate. According to the thermal runaway behavior, the self-heating temperature of the fresh battery is 105.4℃, followed by continuous self-heating. Until the temperature reaches 149.7℃, the battery is out of control, and an internal short circuit occurs, which finally leads to the battery thermal runaway. The initial temperature of self-heating and thermal runaway changes slightly, but the time of thermal runaway progress is shortened greatly.

Key words: lithium ion batteries, heat generation, thermal runaway, cycle aging, adiabatic condition

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