电池荷电状态的估算是电池管理系统的核心内容估算准确与否,将直接影响到电池管理系统的决策和控制。在结合开路电压法、安时法的基础上。充分利用扩展卡尔曼滤波法的修正功能综合考虑电池充放电倍率、温度和充放电循环次数等因素对电池的影晌,提出了卡尔曼滤波修正算法,并将其应用在插电式混合动力汽车电池管理系统中。(The estimation of battery charge state is the core content of battery management system. Whether the estimation is accurate or not will directly affect the decision and control of battery management system. On the basis of open circuit voltage method and time method. Taking full advantage of the modified function of extended Calman filter, the effect of battery charge discharge ratio, temperature and charge discharge cycle times on the battery is taken into consideration. The correction algorithm of Calman filter is proposed and applied to the battery management system of the plug-in hybrid electric vehicle.)