液冷和冷媒直冷动力电池包冷却性能数值分析

采用数值模拟的研究方法,对比分析了某纯电车型在高速超速以及驱动耐久工况下动力电池包采用液冷和冷媒直冷两种方案的冷却性能,研究结果表明,对于高速超速工况,相对于液冷方案,采用冷媒直冷电池包温度降低了约10%;对于驱动耐久工况,采用冷媒直冷方案电池包温度降低了约 16%,与此同时,电池包均温性也有所改善。在相同工况条件下,动力电池包冷媒直冷的冷却性能优于液冷。

Numerical Analysis on Performance Comparison of Liquid Cooling and Phase Change Cooling for Lithium-ion Battery Pack

The numerical simulation was conducted in this paper to investigate and compare the coolingperformance of an electric vehicle when the liquid cooling and the phase change cooling were adopted respectively for the Lithium-ion battery pack under the operating conditions of both high-speed and durability driving. The results show that after adopting the phase change cooling, the temperature of battery pack is reduced by about 10% for the high-speed operating condition and by about 16% for the durability driving. In addition, the temperature uniformity of battery pack is enhanced as well. Under the same operating conditions of the battery pack, the cooling performance of phase change cooling appears to be better than that of liquid cooling.