磷酸铁锂电池热失控传播特性的影响因素研究  

An investigation of the influencing factors on the thermal runaway propagation characteristics of lithium iron phosphate batteries

作　　者：宋来丰 田佳敏 刘勇[1] 王青松[1] Song Laifeng;Tian Jiamin;Liu Yong;Wang Qingsong(State Key Laboratory of Fire Science,University of Sci-)

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026

出　　处：《消防科学与技术》2024年第5期641-650,共10页Fire Science and Technology

基　　金：国家重点研发计划项目(2021YFB2402001);国家消防救援局科技计划项目(2023XFZD01)。

摘　　要：以试验方式探究影响磷酸铁锂电池热失控传播的主要因素,设计了不同荷电状态、电池间距以及电气连接方式的电池模组开展热失控传播试验,根据温度、电压以及质量等参数,分析了不同因素对热失控传播的影响程度。结果表明,3种因素对热失控传播的影响程度依次为:荷电状态、电池间距、电气连接方式。同时得到导致热失控传播的主要传热路径是向下游电池传热。The main factors affecting the thermal runaway propa-gation of LiFePO4 batteries are studied experimentally,and the thermal runaway propagation experiments are carried out by de-signing battery modules with different states of charge,spacing and electrical connections.The influence of different factors on the thermal runaway propagation is analyzed according to the pa-rameters of the battery surface temperature,the change of the bat-tery voltage and the mass.The results show that the influence of different factors on thermal runaway propagation is in the follow-ing order:state of charge,cell spacing,and electrical connections.Meanwhile,it is also obtained that the main heat transfer mode leading to thermal runaway propagation is heat conduction,with heat transfer to the downstream battery as the main heat transfer path.

关 键 词：磷酸铁锂电池 热失控传播 传热 温度变化 电压响应 质量变化 

分 类 号：X913.4[环境科学与工程—安全科学] TM912[电气工程—电力电子与电力传动]