锂离子电池组可用剩余容量计算方法的研究

区分了电池剩余容量与电池可用剩余容量,通过安时法与开路电压法相结合的方法估测电池的SOC。为了更精确计算电池的直流阻抗,实时修正电池运行过程中电流误差系数,通过试验得到电池电压与可用剩余容量的关系及SOC与放电时间的曲线,经过比较,该策略能很好的反映出电池随老化程度及其他条件的改变而发生的容量变化。

Research on the calculating method of residual capacity available for Li-ion battery

The article can distinguish residual capacity available from residual capacity of battery,combining Ah method and open circuit voltage method to estimate SOC of the battery.In order to get more accurate calculation of DC resistance,we also correct the deviation coefficient of the electric current during operation at the real-time.We got the relationship between voltage and residual capacity available and the curve can chow the relationship between SOC and discharge time by test.The strategy can reflects the capacity change of battery with aging degree and other condition＇s change.