基于安时积分法的电池SOC估算

Lithium-Ion Battery SOC Estimation Based on Ahh-total Integration Method

安时积分法是蓄电池荷电状态估算过程中常用的方法,但是,安时积分法不能估算初始荷电状态,难于准确测量库伦效率和电池可用容量变化的问题。基于此问题,文章结合传统的开路电压法和负载电压法,对安时积分法估算蓄电池SOC的不足进行补偿,解决了安时积分法的缺陷。能够实时估算电池的荷电状态,并对估算过程中的不足通过负载电压法进行修正。结果表明,这种算法能得到了比较精确的估算效果。

The ampere-hour integration method is a commonly used method for estimating the state of charge of a battery. However, the ampho-hour integration method cannot estimate the initial state of charge, and it is difficult to accurately measure the coulombic efficiency and the change in available battery capacity. Based on this problem, this paper combines the traditional open-circuit voltage method and load voltage method to compensate for the lack of battery SOC estimated by the ampere-hour integration method, and solves the defect of the ampere-hour integration method. The state of charge of the battery can be estimated in real time, and the deficiency in the estimation process is corrected by the load voltage method. The results show that this algorithm can obtain more accurate estimation results.