The use of carbon tubes filled with paraffin as Phase Change Materials (PCM) in a battery module designed for Electric Vehicles (EV) is experimentally studied in this manuscript. Three different placements of such tubes in between twenty 18650 battery cells are proposed and evaluated based on the measured temperature profiles inside the module under discharge rates of 1, 2, and 4 C (50, 100, and 200 A, respectively). In general, all three configurations could have an average temperature of no more than 40 °C and 55 °C for 1 and 2 C, respectively. In contrast, the 4 C discharge test shows only two out of these three configurations could still maintain an acceptable temperature profile below 70 °C. The first configuration, which offers the most straightforward design among the three, would not withstand any constant discharge rates higher than 1 C. In such as case, it could be recommended to have a spread-out placement of the PCM tubes in the battery module as in the third configuration to prevent the accumulation of dissipated heat around the battery cells, despite a possibly more complex wiring system and installations. In terms of the degree of temperature uniformity, the minimum values of all three configurations lie within the range of 0.60–0.79.

本手稿对在专为电动汽车 (EV) 设计的电池模块中使用填充石蜡的碳管作为相变材料 (PCM) 进行了实验研究。根据在 1、2 和 4 C（分别为 50、100 和 200 A）的放电速率下测量的模块内部温度分布，建议并评估了此类管在 20 个 18650 电池单元之间的三种不同布置。一般来说，所有三种配置在 1 摄氏度和 2 摄氏度时的平均温度分别不超过 40 °C 和 55 °C。相比之下，4 C 放电测试表明，这三种配置中只有两种仍可以在 70 °C 以下保持可接受的温度曲线。第一种配置提供了三者中最直接的设计，不能承受高于 1 C 的任何恒定放电率。在这种情况下，尽管接线系统和安装可能更复杂，但仍建议将 PCM 管分散放置在电池模块中，如第三种配置，以防止电池单元周围的热量积聚. 在温度均匀度方面，所有三种配置的最小值都在 0.60-0.79 的范围内。