基于粒子滤波算法的锂离子电池剩余寿命预测方法研究

摘要

The particle filtering is used to study the prediction of the remaining useful life ( RUL) of lithium-ion batter-ies, and a simple and effective algorithm fusing the model method and the data-driven method for RUL predicting is proposed.The algorithm uses the fusion of the model method and the data-driven method to modify the double expo-nential empirical degradation model to reduce the model parameters and the parameter training difficulty, uses the particle filter algorithm to track the battery capacity degradation process, and uses the auto regression model to modify the observation value of the state space equation to improve the prediction accuracy.The experimental results show that the proposed algorithm can effectively predict the remaining useful life of lithium batteries.%运用粒子滤波算法,进行了锂离子电池剩余寿命(RUL)的预测,提出了一种基于模型法和数据驱动法相融合的简单有效的RUL预测方法.该方法通过模型法和数据驱动法的融合,将双指数经验退化模型进行变形,以减少模型参数,降低参数训练难度,利用粒子滤波算法跟踪电池容量衰退的过程;为提高预测精确度,引入自回归(AR)时间序列模型修正状态空间方程的观测值.实验证实,该方法可以有效地预估出锂电池的剩余寿命.