The paper presents a new type of U-shape flat thermosyphon. The thermosyphon has several unique properties relative to general heat pipe such as compact and simple structure (no wick structure), easily to filling the coolant and flexible plate structure and so on. These properties make it an ideal heat transfer device for battery pack thermal management. In this paper, we experimentally study the thermal management performance of the U-shape flat thermosyphon for a battery module. The temperature of the battery module can be controlled below 50 °C under 1.5 C charge rate (300 W), and below 37 °C under 1 C charge rate (120 W), and the corresponding maximum temperature difference is 3 °C and 7 °C, respectively. And higher power generation is helpful to start-up the U-shape flat thermosyphonand maintain a small temperature difference between different battery cells. The performance of the U-shape flat thermosyphonis evaluated using a thermal resistance network model, which showed that there is uneven distribution of heat transfer in the two side of the heat pipe.

本文介绍了一种新型的U形扁平热虹吸管。热虹吸管具有结构紧凑简单（无毛细结构）、易于填充冷却剂和柔性板结构等相对于一般热管的独特性能。这些特性使其成为电池组热管理的理想传热设备。在本文中，我们通过实验研究了用于电池模块的 U 形扁平热虹吸管的热管理性能。电池模组温度在1.5C充电率（300W）下可控制在50℃以下，在1C充电率（120W）下可控制在37℃以下，对应的最大温差为3℃和7℃ ℃，分别。并且更高的发电量有助于启动U型平板热虹吸管，并保持不同电池单元之间的小温差。U型扁平热虹吸管的性能采用热阻网络模型进行评估，结果表明热管两侧传热分布不均。