考虑老化一致性的电池模组热管理方法研究OA北大核心CSTPCD

Accelerated aging and thermal safety problems caused by the internal heat generation of lithium-ion battery have always been a bottleneck problem restricting the battery industry.More-over,the differences in the aging path and consistency of cells also cause inconsistent battery aging degrees,leading to the difference of internal resistance and heat generation of the battery.Based on the above problems,a thermal management method of battery pack considering aging consistency was proposed.A thermoelectric coupling model was built to identify the battery parameters,and the three-dimensional model of Z-groove air cooling battery pack was built by finite element analy-sis.The impacts of current stress,inlet velocity and battery ageing on the temperature distribution of battery were analyzed.The experiment and simulation were designed to validate the model.The results show that the error of experiment and simulation is below 2℃.