Thermal performance predictions for an HFE-7000 direct flow boiling cooled battery thermal management system for electric vehicles
Thermal performance predictions for an HFE-7000 direct flow boiling cooled battery thermal management system for electric vehicles
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DOI：
10.1016/j.enconman.2020.112569
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发表时间：
2020-03-01
影响因子：
10.4
通讯作者：
Wu, Jiang-Tao
中科院分区：
文献类型：
--
作者：
Wang, Yan-Feng;Wu, Jiang-Tao
本文提出了一种新的电池热管理系统（BTMS），使用电介质，不易燃HFE-7000制冷剂的电动汽车（EV）。通过数值模拟和实验研究了其热性能。制冷剂在电池壁表面上流动和沸腾，这降低了热接触阻力并增强了热传递过程。因此，提高了电池模块的热性能。结果表明，液体制冷剂的强制对流传热在电池模块中的温度上升的控制中占主导地位。最高电池温度下降到35.10摄氏度在0.3米秒（-1）的入口速度和5C放电率。相比之下，单个电池单元之间的温度均匀性主要取决于核沸腾热吸收和两相湍流的局部扰动。在5C放电速率和0.1m s（-1）时，可以观察到不超过3.71 ℃的温差。此外，数值计算结果与实验数据吻合良好。
In this paper, a novel battery thermal management system (BTMS) using the dielectric, non-flammable HFE-7000 refrigerant is proposed for electric vehicles (EVs). Its thermal performance is studied both numerically and experimentally. The refrigerant flows and boils on the battery wall surfaces, which lowers the thermal contact resistance as well as enhances the heat transfer process. Therefore, the thermal performance of the battery module is improved. The results indicate that forced convection heat transfer of the liquid refrigerant is dominating in the control of the temperature rise in the battery module. The maximum battery temperature drops to 35.10 degrees C at 0.3 m s(-1) inlet velocity and a 5C discharge rate. In contrast, the temperature uniformity between individual battery cells primarily depends on the nucleate boiling heat absorption and local perturbation of the two-phase turbulent flow. A temperature difference of no more than 3.71 degrees C can be observed at 5C discharge rate and 0.1m s(-1). In addition, good agreement was found between the numerical results and experimental data.