电动汽车动力电池充电动态特性仿真方法研究

Simulation method research for charging dynamic characteristics of power battery in EV

随着电动汽车充电站的大规模建设及电动汽车车载充电机的推广使用,对于电动汽车充电特性的研究,如:充电设备检测技术、电动汽车充电设备负荷集聚特性等越来越深多,动力电池作为充电机负载对其特性的影响不可忽视。提出了一种用于电动汽车充电特性研究的动力电池动态仿真方法,采用了二阶RC非线性等效电路模型,并通过实验对模型参数进行辨识,然后利用所得到的有限参数进行线性插值,从而实现不同额定参数下,不同充电条件下的电池动态特性的模拟。同时结合热力学理论,根据参数计算出充电过程中各单体电池的温度。最后通过实验验证了提出方法的正确性。

Along with the large-scale construction of station as well as the promotion of electric vehicle（EV） charger,the study of characteristics of electric vehicle charging characteristics was deeper, such as charging equipment detection technology and charging equipment load agglomeration characteristics et.al. Power battery as the charging motor load had noticeable effects on the characteristics. In view of the above situation,a dynamic simulation method was presented for power battery for electric vehicle charging characteristics research, and two order RC nonlinear equivalent circuit model was used by the method. The model parameters were identified through the test. And then by the obtained parameters and linear interpolation, characteristics of battery with different rated parameters under different charging conditions were simulated. Meanwhile, the theory of thermodynamics was used to calculate the temperature of each cell of the battery. Finally,the correctness of the proposed method was verified by experiment.