精确估算动力电池的荷电状态(State of Charge,SOC)是发展电动汽车技术的关键。SOC值很难直接测出,只能通过与电池有关的温度、电流和电压等因素间接估算。文中提出了一种安时法和开路电压法结合的方法,对算法影响SOC估算的各个因素进行了补偿修正,并用Simulink建模仿真,对比仿真结果与试验结果,证明了该方法的准确性。 Accurately estimating the battery’s state of charge (SOC) is the key to developing EV technology. SOC value is difficult to measure directly, only through the battery-related temperature, current and voltage and other factors indirectly estimated. In this paper, a new method of combining open-circuit and open-circuit voltage method is proposed, and the various factors that affect the SOC estimation are compensated and corrected. Simulink is used to simulate and simulate. The simulation results and experimental results are compared to prove the accuracy of the method.