锂离子动力电池组充放电动态特性建模

Modeling of the dynamic charge-discharge characteristics of Li-ion power batteries

对288 V锂离子动力电池组在充放电过程中的工作电压特性进行了分析,建立了锂离子动力电池组在充放电过程中工作电压变化的数学模型,并进行了模拟工况和实车道路行驶条件下的实验验证。模型在模拟工况下的最大误差不超过1.35 V,能适应电动汽车范围大且频繁的电流变化。

The working voltage characteristics of the 288 V Li-ion power batteries during charge-discharge were analyzed. A mathematic model of working voltage change during charge-discharge of the Li-ion power batteries was build. The experimental verification of working condition simulation and testing on the roadway of the car were taken. The error of the model was less than 1.35 V during working condition simulation, the model could adapt the wide and frequent current change on the electric vehicle.