高低温环境下钢制与铝制电池包热保温性能对比研究

Comparative study of the thermal insulation performance of steel and aluminum battery packs in high-and low-temperature environments

电池包作为纯电动汽车唯一的动力源,其性能易受温度的影响,温度过高或过低都会使电池包的使用性能下降。建立了某款纯电动汽车的铸铝电池包与钢制电池包的热分析有限元模型,对两种电池包在高低温工况下的保温性能进行了对比。仿真结果表明:在高温和低温工况下,两种电池包的保温性能均满足设计要求,电芯与电池包外界环境主要通过热传导的方式进行热量的传递。针对钢制电池包电芯的均温性能较铸铝电池包低的问题,对钢制电池包的保温设计提出了多个优化方案,通过仿真结果进行对比分析得出最优的方案。

As the only power source of pure electric vehicle,the performance of battery pack is easily affected by temperature,too high or too low temperature will make the performance of battery pack decline.The thermal analysis finite element modeling of cast aluminum battery pack and steel battery pack of a pure electric vehicle is established to compare the thermal insulation performance of the two battery packs under high and low temperature conditions.The simulation results show that the thermal insulation performance of the two battery packs meets the design requirements under high and low temperature conditions.The external environment of the cell and the battery pack transmits heat mainly through heat conduction.Aiming at the problem that the uniform temperature performance of the steel battery pack is lower than that of the cast aluminum battery pack,several optimization schemes are put forward for the insulation design of the steel battery pack,and the optimal scheme is obtained by comparing the simulation results.