车用锂离子并联电池组连接故障特性  

Connection fault characteristics of lithium-ion parallel battery module in electric vehicles

作　　者：王丽梅 赵明明[2] 潘邦雄 赵秀亮 WANG Limei;ZHAO Mingming;PAN Bangxiong;ZHAO Xiuliang(Key Laboratory of Traffic Vehicle Testing,Diagnosis and Maintenance Technology,Jinan,Shandong 250357,China;Automotive Engineering Research Institute,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]运输车辆检测、诊断与维修技术交通行业重点实验室,山东济南250357 [2]江苏大学汽车工程研究院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2025年第1期18-27,共10页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(52072155);运输车辆检测、诊断与维修技术交通行业重点实验室开放基金资助项目(JTZL2103)。

摘　　要：首先设计并联电池组连接故障试验,对并联电池组连接故障特性进行了初步分析,发现连接故障电阻越大,故障电压曲线偏离正常电压曲线程度越大;然后搭建并联电池组故障仿真模型,探究不同位置连接故障下并联电池组电压及支路电流特性,结果表明,发生连接故障的位置越靠近负载连接点,各支路电流分配不均匀程度受影响越小;最后,探究不同程度连接故障下电压、电流及容量增量(incremental capacity,IC)曲线特性,发现不同连接故障程度下支路电流曲线存在明显的差异性,不同倍率下IC曲线特征差异性较大,Ⅱ峰相对较为稳定,其与接触阻抗存在一定的相关性.The connection fault characteristics of parallel battery modules were analyzed by the designed connection fault testing method,which showed that the larger the connection fault resistance was,the larger the terminal voltage deviation was.The voltage and branch current characteristics at different connection fault degrees were explored by the fault simulation model.The results show that the closer the fault location to the load connection point is,the smaller the impact on the uneven distribution of each branch current is.The characteristics of voltage,current and incremental capacity(IC)curves at different connection fault degrees indicate that there are significant differences in the branch current.The characteristics of the IC curve vary greatly at different C-rates.The peakⅡis relatively stable,which has correlation with the connection resistance.

关 键 词：锂离子电池 并联电池组 连接故障 支路电流 容量增量曲线 

分 类 号：TM912[电气工程—电力电子与电力传动]