相变材料特性对车用动力锂电池热失控的影响  

Effect of phase change material characteristics on thermal runaway of vehicle lithium power battery

作　　者：谷清平 郑成博 GU Qingping;ZHENG Chengbo(North China University of Science and Technology,Tangshan Hebei 063000,China;Tangshan Vocational College of Science and Technology,Tangshan Hebei 063000,China)

机构地区：[1]华北理工大学,河北唐山063000 [2]唐山科技职业技术学院,河北唐山063000

出　　处：《电源技术》2022年第12期1383-1387,共5页Chinese Journal of Power Sources

基　　金：河北省科技厅科学研究基金项目(18274522)。

摘　　要：为了明确相变材料的属性对散热控制过程中热失控传播速度的影响,以18650锂离子电池模组为研究对象,通过Blotzmann方法对不同相变材料性质条件下的热失控传播性质进行计算与分析。研究结果表明,材料的潜热属性对热失控的传播影响很小;随着材料热导率的增大,热失控在电池模组各单体电池之间的传播时间先缩短后延长,在热导率达到某一数值后出现传播时间变化的拐点。研究成果为进一步优化锂离子电池模组的热管理方式提供了具有较高价值的理论依据。In order to clarify the influence of the properties of phase change materials on the runaway heat transfer velocity in the process of heat dissipation control,this paper took 18650 lithium-ion battery modules as the research object,and calculated and analyzed the runaway heat transfer properties under different properties of phase change materials by using the Blotzmann method.The results show that the latent heat property of the material has little effect on the propagation of thermal runaway;with the increase of the thermal conductivity of the material,the propagation time of thermal runaway between each cell of the battery module first shortens and then extends,and the inflection point of the propagation time changes after the thermal conductivity reaches a certain value.The results of this study provide a valuable theoretical basis for further optimizing the thermal management of lithium-ion battery modules.

关 键 词：相变材料特性 动力锂电池 热失控 导热模型 热导率 

分 类 号：TM912.9[电气工程—电力电子与电力传动]