2023.1Vol.47No.1研究与设计收稿日期：2022-06-12作者简介：李昂(1992—)，男，河南省人，硕士，工程师，主要研究方向为动力电池安全。三元锂离子动力电池包热失控蔓延数值分析李昂，刘卫国，喻成，李宗华，赵晨(重庆长安新能源汽车科技有限公司，重庆401120)摘要：为研究电池包关键参数对于热失控蔓延抑制的影响，建立了锂离子电池包热失控蔓延集总参数模型，运用正交试验方法，并通过综合频率分析法得到了一组最佳试验方案：电芯与侧板间的热阻为0，即除去原有正常装配所产生的接触热阻，不新增热阻；电芯间热阻0.08m2·K/W；侧板外隔热垫厚度4.5mm；电芯与水冷板间的热阻0.24m2·K/W。与原方案相比，靶模组电芯平均热失控蔓延间隔时间延长419.9s；观察模组热失控电芯数量减少36个；观察模组最高温降低1067℃，可有效抑制模组间热蔓延。所得结论可用于三元锂离子动力电池包的热蔓延抑制设计。关键词：锂离子动力电池；热蔓延；蔓延抑制；正交试验中图分类号：TM912文献标识码：A文章编号：1002-087X(2023)01-0041-06DOI:10.3969/j.issn.1002-087X.2023.01.010NumericalanalysisofthermalrunawaypropagationforNCMlithiumionpowerbatterypackLIAng,LIUWeiguo,YUCheng,LIZonghua,ZHAOChen(ChongqingChanganNewEnergyAutomobileS&TCo.,Ltd.,Chongqing401120,China)Abstract:Inordertostudytheinfluenceofthekeyparametersofthebatterypackonthethermalrunawaypropagationprevention,alumpedmodelofthethermalrunawaypropagationsetforlithiumionbatterieswasestablished.Anoptimaltestschemewasobtainedbyusingorthogonaltestmethodandcomprehensivefrequencyanalysismethod.Agroupofoptimalexperimentalschemeswereobtained,resistancebetweencellsandsideplateis0m2·K/W,itmeansthatforgettingthecontactheatresistancefromtheoriginalnormalassemblywithoutaddingnewheatresistance.Resistancebetweencellsis0.08m2·K/W,thicknessofheatinsulationplateis4.5mm,resistancebetweencellsandcoolingplateis0.24m2·K/W.Comparedwithoriginalplan,themaximumtemperatureofobservationmodulesdecreased1067℃,averagetimeofpropagationamongcellsincreased419.9s,amountofpropagationcellsofobservationmodulesdecreased36.Theconclusioncanbeappliedtothedesignofthermalrunawaypropagationpreventionforlithiumionbatterypack.Keywords:lithiumion...
