电动汽车动力电池热失控试验与仿真  

Thermal Runaway Test and Simulation of Electric Vehicle Power Batteries

作　　者：昂金凤[1] 刘舒龙[1] 庞灿 刘硕 ANG Jinfeng;LIU Shulong;PANG Can;LIU Shuo(Anhui Jianghuai Automobile Co.,Ltd.,Hefei 230601,China)

机构地区：[1]安徽江淮汽车股份有限公司,安徽合肥230601

出　　处：《汽车电器》2024年第10期18-21,共4页Auto Electric Parts

摘　　要：在仿真软件中构建某款圆柱三元锂离子电池热失控模型,通过加热电芯的方式来触发其热失控,同时建立2组对照模型,一组全程不开启液冷,另一组在被加热电芯热失控的瞬间开启液冷。结果表明:在不开启液冷的模型中,电芯热失控所产生的大量热量传递给了周边电芯,致使周围电芯逐一失控。而在对照组中,由于在电芯热失控的瞬间开启了液冷,电芯热失控产生的热量迅速被冷却液带走,周围电芯的温度低于失控临界值,因而没有发生热失控,从而有效地遏制热蔓延的出现。The thermal runaway model of a cylindrical ternary lithium-ion battery was constructed in the simulation software.The thermal runaway model was triggered by heating the battery cell.At the same time,two sets of control models were established:one group did not turn on the liquid cooling during the whole process,and the other group turned on the liquid cooling at the moment of the thermal runaway of the heated battery cell.The results show that in the model without liquid cooling,a large amount of heat generated by thermal runaway is transferred to the surrounding cells,causing the surrounding cells to lose control one by one.However,in the control group,because the liquid cooling is turned on at the moment of the cell thermal runaway,the heat generated by the cell thermal runaway is quickly taken away by the coolant,and the temperature of the surrounding cell is lower than the runaway critical value,so there is no thermal runaway,so as to effectively curb the appearance of thermal spread.

关 键 词：锂离子电池 热失控 热蔓延 

分 类 号：U469.72[机械工程—车辆工程]