基于扩张卡尔曼滤波的磷酸铁锂蓄电池SOC检测，给出了电池模型和算法实现过程。-The extended Kalman filter (EKF) method for SOC estimation has some problems such as the lack of an accurate model, and model errors due to the variation in the parameters of the model due to the nonlinear behav

离线辨识的二阶电池模型的参数，可以实现EKF的soc估算(Off-line identification of parameters of second-order battery model can realize SOC estimation of EKF)