Energy Storage Science and Technology ›› 2021, Vol. 10 ›› Issue (4): 1344-1352.doi: 10.19799/j.cnki.2095-4239.2021.0064

• Energy Storage System and Engineering • Previous Articles     Next Articles

Analysis of electrothermal coupling abuse condition based on thermal runaway model of lithium-ion battery

Jinlong XU1(), Jiani SHEN1, Qiankun WANG1, Yijun HE1(), Zifeng MA1, Wen TAN2, Qingheng YANG2   

  1. 1.Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2.Pylontech Enegy Technology Co. Ltd. , Shanghai 201203, China
  • Received:2021-02-24 Revised:2021-04-30 Online:2021-07-05 Published:2021-06-25
  • Contact: Yijun HE E-mail:jinlongxu1@163.com;heyijun@sjtu.edu.cn

Abstract:

At present, the safety problem caused by thermal runaway (TR) of lithium-ion batteries (LIBs) has been the bottleneck for the promotion of electric vehicles and large-scale energy storage stations. To tackle this problem, great efforts have been made to study the TR characteristics of LIBs. The electrical abuse and the thermal abuse are two key reasons that induce the TR. In this paper, based on the TR model, the electrical and thermal response of LIB are systematically studied under different abuse conditions. Three influencing impacts are comprehensively investigated, including charging rate, ambient temperature and heat dissipation. These results show that compared with the TR induced by the overcharge, the TR would occur at lower SOC under the combined overcharge and overheating condition. In the face of extreme high temperature environment, the TR could even occur at the early charge stage. Moreover, under the overheat condition with low surface heat transfer coefficient, the charging rate has little effect on trigger SOC of thermal runaway; While under the overheat condition with natural convection condition, the thermal runaway would occur at higher SOC with the increase of charging rate, but the thermal runaway time would be reduced. This study provides support for the development of reliable battery safety early warning technology.

Key words: lithium-ion battery, overcharge, overheat, thermal runaway model, electrothermal coupling abuse

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