Volume 50

Investigation on Collaborative Optimization Strategy based on PCM-Air Composite Cooling Battery Thermal Management System Guangliang Wang, Jun Zhao, Jing Wang, Lei Gu, Juan Song, Jintao Niu

Abstract

In order to make full use of the latent heat of phase change material (PCM) and reduce loss of active cooling power consumption, based on synergy idea, this study discusses the influence of three air supply strategies of air-cooling start time, air-cooling stop time and air-cooling velocity on the composite cooling effect. Based on the entropy weight method, the optimal air supply strategy in the above three schemes is selected. The results show that after optimizing the air supply strategy, the PCM utilization rate of three schemes is increased by 52.50%, 29.13% and 31.44% respectively. The loss of air-cooling power consumption is reduced by 52.61%, 18.72% and 31.44% respectively. In particular, the strategy of adjusting the inlet velocity of battery module has the best comprehensive target performance, and the OP value is 0.64. The maximum temperature and maximum temperature difference after discharge are 307.55 K and 2.66 K, respectively. In general, it is feasible to optimize the composite cooling scheme based on the idea of synergy.

Keywords PCM cooling, air cooling, battery thermal management, optimization strategy