动力锂离子电池稳态特性参数Map建模与仿真

Map modeling and emulation of steady-state characteristic parameters of power Li-ion battery

提出并实现了一种车用动力锂离子电池稳态特性参数的数学模型,该模型针对混合动力车用8Ah锂离子电池,选取对电池SOC有重要影响的性能参数(电压、电流、温度等),设计相关实验(主要是倍率充放电实验和开路电压SOC关系实验);应用实验数据,通过插值、拟合等方法补充实验缺省数据,建立电池稳态特性参数Map图,用以估算电池的SOC,对建立的Map用实际工况曲线进行仿真。仿真结果表明,应用建立的Map图,对电池稳态SOC查询估算的精度可以达到4%以内。

A model of steady-state characteristic parameters of Li-ion battery was proposed to achieve SOC （State-of-Charge） estimation. The model was established on Li-ion battery which had a rated capacity of 8 Ah used for HEV. Some fateful characteristic parameters for battery SOC estimation such as voltage, current, temperature, and etc, were chosen to constitute the Map. Some experiments （mainly multiple current charge and discharge tests and OCV-SOC tests） were designed to get these data. Use the methods of interpolation and fitting to complement the absent data, and get the battery steady-state parameter SOC estimation Map. An emulation of U-ion battery actual work was tested, and the results indicate that using the method to estimate SOC makes the precision under