电动汽车动力电池在充放电过程中快速产生大量的热量，开展高效散热设计有利于提升电池组工作效率及其安全性。采用冷板和电池组相结合的方式进行电池组液冷散热设计，以50 ℃作为临界最高温度进行研究，结果表明冷板与电池组采用侧面侧方布置时电池表面平均温度最低，温度均匀性较好。满足散热设计对应的相间侧向所需质量流量最小且为0.05 kg/s，而相间上向模型的压降最小。因此，电池组散热设计时可优先选择电池单体与冷板相间布置的结构。

The charging and discharging process of electric vehicle power batteries generates a large amount of heat, and the development of an efficient heat dissipation design is conducive to improving the efficiency and safety of the battery packs. A combination of cold plate and battery packs was used for the liquid cooling heat dissipation design of the battery packs. The critical maximum temperature was set to 50 ℃ here and the results showed that the average battery temperature was lowest and the temperature uniformity was better when the cold plate and battery packs were arranged in a side-to-side lateral direction. The minimum required mass flow rate was 0.05 kg/s for the inter-phase lateral model, while the inter-phase upward model had the lowest pressure drop. Therefore, a structure with an interphase arrangement of power battery and cold plates can be preferred for the thermal design of the battery packs.