Recently, there has been a gradual increase in the use of battery powered electric multiple unit trains (EMUs), replacing the conventional diesel trains for nonelectrified lines of approximately 10–30 km. Battery powered EMUs are typically equipped with closed‐type traction battery boxes, in which cooling fans are mounted. To improve the performance of battery cooling, we developed a control method for the cooling fans. Our novel method is derived from a thermal network model of the battery box, and is based on the temperature difference between the battery modules and outside air. We conducted an evaluation test for the Series BEC819, an AC‐fed and battery‐powered hybrid EMU of JR Kyushu. The test results demonstrated that the developed control method reduced maximum temperature of the battery by 1–2°C in comparison with the conventional constant speed control.

中文翻译：

---

基于热网模型的电池动车组牵引电池箱内风扇冷却控制方法

最近，使用电池供电的电动多列火车（EMU）的使用逐渐增加，代替了大约10–30 km的非电气化线路的传统柴油火车。电池驱动的动车组通常配备有封闭式牵引电池盒，并在其中安装了冷却风扇。为了提高电池冷却的性能，我们开发了冷却风扇的控制方法。我们的新方法基于电池盒的热网络模型，并基于电池模块和外部空气之间的温差。我们对JR九州的交流电和电池供电混合动车BEC819系列进行了评估测试。