电动汽车用锂离子电池模组低温加热仿真研究

Pre-Heating Simulation of Lithium-ion Battery Module for Electric Vehicles

针对锂离子电池在低温环境下其放电容量会发生衰退而需要预热的现状,建立了以电加热膜为外部热源的电池模组低温加热仿真模型,对比分析得出三种加热膜布置方案下的低温加热效果。仿真结果表明,当模组的侧面和底面同时布置加热膜时其温度一致性以及使用安全性均效果良好。仿真模型可以用于分析不同加热方案下的预热效果,为电池低温加热系统的开发提供了理论基础与指导思路。

Aiming at the situation that the discharge capacity of lithium-ion batteries will decline in low temperature environment, a low-temperature heating simulation model of battery module with electric heating film as external heat source was established. The simulation results show that the temperature uniformity and safety of the module are satisfactory when the electrothermal film is placed on both the side and the bottom. The simulation results can provide some guidance for the development of low temperature heating system.