采用遗传算法对 EKF 中的系统噪声矩阵和测量矩阵的协方差进行在线优化，以实现在模型误差最小时对 SOC 进行在线估计(Genetic algorithm is used to optimize the covariance of system noise matrix and measurement matrix in EKF on-line, so as to realize the on-line estimation of SOC at the minimum model error)