流道布置对方形锂电池组温度场的影响

Influences of Flow Channel Arrangement on Temperature Field of Square Lithium Battery Pack

锂电池被广泛应用于新能源电动汽车,但其使用性能受温度影响较大。提出一种液冷式锂电池组散热结构,并用Fluent分析了液冷流道数量、流道间距、流道进出口排布方式对电池组在3C放电倍率下温度场的影响。结果表明随着液冷流道数量的增加,电池组的最高温度和温差均显著下降,且合适的流道间距能有效改善电池组的散热情况,此外,合理布置流道的进出口可以明显降低电池组温差。

Lithium batteries have been widely applied to new energy electric vehicles,but their performance is greatly affected by temperature.In this paper,a heat-dissipating structure for a liquid-cooling lithium battery pack is proposed,and the influences of the number of liquid-cooling channels,channel spacing,and the arrangement of inlet and outlet of channels on the temperature field of the battery pack at a 3C discharge rate are analyzed using FLUENT.Results show that with the increase in the number of liquid-cooling channels,the maximum temperature and temperature difference of the battery pack are significantly reduced,and a proper channel spacing can effectively improve the heat dissipation of the battery pack.In addition,a reasonable arrangement of the inlet and outlet of channels can significantly reduce the temperature difference of the battery pack.