通过阻抗预测电池SOC的可行性研究

Research on feasibility of predicting battery SOC by impedance

测试了Panasonic的LC-XA12100和Vision的6FM100HX电池在充电过程和放电过程中不同荷电状态(SOC)的阻抗变化,同时测试了在电池使用过程中经常会遇到的两个变量(环境温度和放电倍率)对电池阻抗的影响。结果表明,在SOC大于60%时,通过测量阻抗预测电池的SOC是不可行的;在SOC小于60%时,通过测量阻抗预测电池的SOC是可行的,但需要从多个维度考虑各参数对测量值的影响,建立完善的数据库。

The relationship between SOC and impedance of Panasonic LC-XA12100(12V100Ah)and Vision6FM100HX(12V100Ah)battery during charge and discharge was tested.Meanwhile,the influence of environment temperature and discharge rate on the battery impedance was tested.The results show that it is not feasible to predict battery SOC by impedance when the SOC is greater than60%,and it is feasible when the SOC is less than60%,but it is necessary to consider the influence factors and establish a complete database.