Volume 50

Thermal Management Design and Parameter Optimization of Battery Energy Storage System Under High Discharge Rate Scenario Guangliang Wang, Jing Wang, Juan Song, Jintao Niu, Yuhan Ding, Yuxin Luo, Jun Zhao

Abstract

The lifetime and performance of battery energy storage system depend on the temperature uniformity between batteries. In order to meet the temperature requirements in high discharge rate scenarios, this study proposes a novel composite cooling system. Based on the battery module, a thermal management system integrating PCM cooling, air cooling and liquid cooling is established. The influence of liquid cooling layout and flow direction on temperature uniformity is discussed. The flow parameters of air cooling and liquid cooling are optimized by orthogonal analysis. The results show that liquid-cooled longitudinal flow has better temperature uniformity than cross flow. When the liquid cooling flow direction is completely countercurrent, the maximum temperature difference is reduced to 4.35 K, and the improvement effect is 12.47%. After further auxiliary air cooling with inlet velocity of 0.4 m/s, the maximum temperature difference is reduced to 4.13 K. In general, this study can provide a new idea for BTM of high-rate discharge scenarios.

Keywords Battery energy storage system, composite cooling, liquid cooling optimization, orthogonal analysis