动力电池挤压机械损伤后性能演化研究  

Study on performance evolution of power battery after crushing mechanical damage

作　　者：孙智鹏 陈立铎[1,2] 卜祥军 刘鹏 刘仕强[2] SUN Zhi-peng;CHEN Li-duo;BU Xiang-jun;LIU Peng;LIU Shi-qiang(CATARC Automotive Test Center(Tianjin)Co.,Ltd.,Tianjin 300300,China;Tianjin Key Laboratory of Evaluation Technology for Electric Vehicles,China Automotive Technology and Research Center Co.,Ltd.,Tianjin 300300,China)

机构地区：[1]中汽研汽车检验中心(天津)有限公司,天津300300 [2]中国汽车技术研究中心有限公司,天津市电动汽车评价技术企业重点实验室,天津300300

出　　处：《电源技术》2020年第7期964-966,1039,共4页Chinese Journal of Power Sources

基　　金：国家重点研发计划项目(2018YFB0104400)。

摘　　要：动力电池作为电动汽车最重要的储能单元,已成为电动汽车安全问题的重中之重。以某款三元体系方形锂离子动力电池单体为研究对象,通过人为制造单体电池挤压机械损伤,模拟车辆在受到撞击、冲击等因素造成车辆电池系统内部单体电池发生损伤的场景,对比了不同损伤形变电池损伤前后过充电、过放电、短路等安全性,以及常温、高温倍率放电等电性能实验结果,对动力电池挤压机械损伤后性能演化进行研究,为行业提供用户端演化结果支撑,同时也可为二手车车辆残值评估提供相关数据参考。As an important energy storage unit of electric vehicles,power batteries have become the key to the safety of electric vehicles.In this paper,a ternary system of square lithiumion cell is taken as the research object.Through artificial manufacturing of single cell crushing mechanical damage,the scene of single cell damage in vehicle battery system caused by impact,impact and other factors is simulated.The safety performances of overcharge,overdischarge and short circuit before and after damage are compared,and the experimental results of electrical performance in room temperature and high temperature are studied.The performance evolution of the power battery after mechanical damage is studied to provide support for vehicles field.The results can also provide relevant data reference for the residual value evaluation of used car vehicles.

关 键 词：锂离子电池 机械损伤 安全性 电性能 

分 类 号：TM912[电气工程—电力电子与电力传动]