基于相变材料的电池模组热失控传播过程研究

For studying the heat transfer path in the process of battery thermal runaway propagation, a thermal runaway model for battery module is established and verified by needle punching experiments, which consists of a one-dimensional electrochemical model, an internal short circuit model, a three-dimensional heat transfer model and a side reaction model and coupled with each other. A thermal management scheme for battery module based on phase change materials and liquid cooling is proposed to analyze its suppression role to the thermal runaway propagation of battery module. The results show that the thermal management scheme proposed can extend the time interval of thermal runaway of each battery in a battery module and speed up the temperature decline of each battery, playing a good role in suppressing the thermal runaway propagation of battery module.