Estimate SOC of lithiun ion battery is a difficult point of battery management.This paper gives the formula of open-circuit voltage through analysing discharge curve and recovery curve,resolve the problem of forecasting open-circuit voltage,make estimate of SOC through open-circuit voltage possible.This paper uses the method of establishing battery model,use the data to make curve-fitting,and get the optimal value,the prove it with other data.The results of experiment proved that forecast accuracy is 0.02% by using this method.%估算锂离子动力电池荷电状态（SOC）是电池管理的一个难点,通过对电池放电曲线及恢复曲线分析,拟合出电池开路电压的计算公式,解决了动态情况下预测电池开路电压的问题,使开路电压估算SOC在电动车上使用成为可能。本文采用建立电池模型的方法,通过实验所得数据对模型进行曲线拟合,得到最优参数,并通过另外几组数据进行验证。实验结果表明,采用本方法预测精度为0.02%。
展开▼
