三元锂离子动力电池过充电表征行为试验研究  

Experimental Study on Overcharging Behavior of Ternary Lithium Ion Traction Battery

作　　者：刘仕强[1] 左易鑫 韦振 卜祥军[1] 马天翼 白广利 王芳[1] LIU Shiqiang;ZUO Yixin;WEI Zhen;BU Xiangjun;MA Tianyi;BAI Guangli;WANG Fang(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：《重庆理工大学学报（自然科学）》2020年第6期18-24,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：国家重点研发计划资助项目(2018YFC1902200)。

摘　　要：因过充电原因频繁引发新能源汽车着火事故,以三元锂离子动力电池为研究对象,对过充电表征行为试验进行研究与分析。在绝热环境下进行不同过充电量条件下的测试,分析过充电过程中关键表征参数的变化及产热结果比较验证,发现样品失控前的过充电过程可以分为5个阶段,当过充电量超过40%后,副反应引起的产热增多,并根据电压、温度等参数的变化确定该样品的过充电安全边界条件。In view of the fact that the cause of overcharging caused more and more fire accidents in new energy vehicles,the research group took the ternary lithium-ion battery as the research object,and carried out the experimental research and analysis of the overcharging behavior.Under the condition of different over-charge conditions in the adiabatic environment,the changes of key characterization parameters and the comparison of the heat-generating results during the over-charging process were analyzed.It was found that the over-charging process before the sample was out of control can be divided into five stages,when the over-charged amount is more than 40%,the heat generation caused by the side reaction increases,and the overcharge safety boundary condition of the sample is determined according to changes in parameters such as voltage and temperature.

关 键 词：过充电 电压 温度变化率 产热分析 安全边界条件 

分 类 号：TM912[电气工程—电力电子与电力传动]