蓄电池核电状态的评估，与MATLAB仿真-This article　the lithium ion power battery　current- voltage response , through the experiment analyzes the FreedomCar battery model existing shortcomings, puts forward improvement on its, and prove the feasibility of the improved model under the working condition of hybrid. According to the linear model was proposed based on the least squares method of parameter identification, and according to the concrete application condition of the hybrid electric vehicle was proposed and implemented based on the　current- time window　SOC calibration method.