电动车辆用锂离子电池热特性研究

Research on Thermal Characteristics of EVs Lithium-ion Battery

电动车辆的性能和成本很大程度上取决于动力电池组的性能和使用寿命,而电池组的性能和使用寿命又受到电池生热的影响。为了研究电池在充放电过程中的生热特性,以35 A·h,3.7 V方形锰酸锂电池为研究对象,对常温下充放电生热特性和低温放电的生热特性进行研究。研究结果表明:随着放电电流增大,电池温度快速提高,且低温环境下利用电池放电生热可改善电池性能,这些将为后续动力电池组热管理系统研究提供参考。

The performance and cost of electric vehicle depend on the performance and lifetime of battery package, and the heat generated during charge--discharge influences on the performance and lifetime of battery package. This paper researches charge-discharge thermal characteristics of 35 A ·h,3.7 V lithium-ion battery in normal temperature and cold temperature. The result shows that the battery temperature increased rapidly when the discharge current increases, and the heat generated during charge--discharge can be used to improve charge-discharge performance of battery in low temperature, and these provide reference for subsequent research on the power batterythermal management system.