arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.09936eess.SYcs.SY
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基于渐近局部法的锂离子电池小故障检测与隔离

Detection and Isolation of Small Faults in Lithium-Ion Batteries via the Asymptotic Local Approach

Luis D. Couto, Jorn M. Reniers, David A. Howey, Michel Kinnaert

摘要:

这一贡献提出了一种诊断方案,电池检测和隔离的形式,小参数变化的内部故障。该方案基于电池的电化学降阶模型,其允许包括可能影响电池性能的物理上有意义的故障。分析了模型的灵敏度特性。然后,该模型用于计算残差的基础上的无迹卡尔曼滤波器。主要的残差和有限的协方差矩阵得到感谢本地的方法,允许故障检测和卡方统计检验隔离。结果表明,该方法可以有效地检测出有限的0.15%的容量和0.004%的功率衰减的故障。该算法还能够正确地隔离与敏感参数相关的故障,而低灵敏度或线性相关的参数更难以精确。

英文摘要:

This contribution presents a diagnosis scheme for batteries to detect and isolate internal faults in the form of small parameter changes. This scheme is based on an electrochemical reduced-order model of the battery, which allows the inclusion of physically meaningful faults that might affect the battery performance. The sensitivity properties of the model are analyzed. The model is then used to compute residuals based on an unscented Kalman filter. Primary residuals and a limiting covariance matrix are obtained thanks to the local approach, allowing for fault detection and isolation by chi-squared statistical tests. Results show that faults resulting in limited 0.15% capacity and 0.004% power fade can be effectively detected by the local approach. The algorithm is also able to correctly isolate faults related with sensitive parameters, whereas parameters with low sensitivity or linearly correlated are more difficult to precise.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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