锂离子电池内阻辨识及其在寿命估计中的应用

Internal resistance identification of Li-ion battery and its application in battery life estimation

根据锂离子动力电池的特性分析,以实时辨识锂离子电池欧姆内阻为目标,建立了电池内阻简化模型。在该模型的基础上,利用实验采集的数据和递推最小二乘算法,实现了对电池欧姆内阻的在线实时辨识。通过该内阻辨识算法,开展了电池寿命估计实验,获得了电池内阻在不同工况下的变化趋势等相关结论,为实现寿命状态估计提供了有益的参考。

According to the characteristic analysis of lithium-ion power battery, battery internal resistance equivalent model was established aiming at the real-time identification of lithium-ion battery ohmic resistance. Based on this model, the real-time identification was achieved by the experimental collected data and recursive least squares algorithm. The adoption of battery internal resistance identification algorithm was applied to the battery life estimation test, which was performed to obtain the relevant conclusions such as the changing trend of battery internal resistance in different conditions and provided some useful reference for the battery life state estimation.