纯电动轨道工程车锂离子动力电池温升研究

为了探究轨道工程车动力电池温升特性,对电池在充放电倍率为0.5C和1.0C时实测的生热功率数据进行二次函数拟合,得到了动力电池在不同荷电状态和充放电倍率时的生热功率。根据电池包传热特性和电池生热功率,对动力电池温度进行了计算。研究表明,在环境温度40℃条件下完成所选严苛线路的牵引时,电池温度为45℃;磷酸铁锂动力电池通过自然冷却能够满足轨道工程车低倍率放电、短时间运行和长时间停留使用的冷却需求。

Research of Temperature Rise in the Lithium-Ion Traction Battery of Engineering Vehicles

In order to study the temperature characteristics of the power battery of engineering vehicles, the heating power of battery at different SOC and charge-discharge rate was obtained by performing quadratic function fitting on the data measured at the charge-discharge rate of 0.5C and 1.0C. The temperature rise of traction battery was studied according to the heat transfer characteristics and heating power of battery. The research shows that the battery temperature is 45 ℃ after completing the traction on the strict line when the environment temperature is 40 ℃. The lithium-ion power battery can meet the cooling requirements of low rate discharge, short time operation and longtime stay of the engineering vehicle by natural cooling.