相变材料耦合冷板电池热管理系统的优化设计

以相变材料耦合冷板电池热管理系统为研究对象，采用数值方法研究了系统的冷却性能。结果表明，通过增加耦合系统的冷却水流量可以降低电池组温度和温差，但是显著增加了冷板功耗，系统能效较低。为了提高耦合热管理系统的冷却效率，在固定系统体积的情况下，采用优化策略对系统中相变材料的厚度分布进行调整。典型算例结果表明，优化策略仅需5步调整就能得到最佳相变材料厚度分布。相比于优化前系统，优化后的系统使电池组最高温度降低了1.1 K，温差减小了29%。在同等电池组温差下，优化系统的功耗相比优化前系统下降了64%。

Design of the Battery Thermal Management System With Phase Change Material Coupled Cold Plates

The battery thermal management system with phase change material coupled cold plates was investigated with the numerical simulation method. The results show that, the temperature and temperature difference of the battery pack decreases with the increase of the flow rates of the cold plate in the system, while the power consumption of the cold plate significantly increases, which leads to poor efficiency of the system. To improve the efficiency of the coupled thermal management system, an adjusting strategy was introduced to optimize the thickness distribution of phase change materials with the system volume fixed. The optimized results of typical cases show that, the optimal phase change material thickness distribution can be obtained by only 5 adjusting steps. Compared with the original system, the maximum temperature of the battery pack drops by 1.1 K and the temperature difference narrows down by 29% after the optimization. To achieve the same temperature difference in the battery pack, the power consumption of the optimized system lowers down by 64% compared with that of the original system.