期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 69, 期 5, 页码 5175-5184出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2021.3078376
关键词
State of charge; Estimation; Batteries; Battery charge measurement; Integrated circuit modeling; Electronic countermeasures; Mathematical model; Lithium-ion battery; measurement unavailability; recursive filtering; state of charge (SOC)
资金
- National Natural Science Foundation of China [61773218, 61903252, 62003213]
- Program for Professor of Special Appointment (Eastern Scholar) at the Shanghai Institutions of Higher Learning
- Shanghai Pujiang Program [19PJ1408100]
- China Postdoctoral Science Foundation [2019TQ0202, 2020M671172]
This article investigates the estimation problem of the state of charge (SOC) of Lithium-ion batteries. It considers the unreliability and data missing phenomenon of sensor measured data, and proposes a data-unavailability-resistant nonlinear recursive filtering algorithm to estimate the real SOC in an unreliable industrial environment.
In this article, the estimation problem of the state of charge (SOC) of Lithium-ion batteries is investigated. In order to truly reflect the unreliability of the sensor measured data, the data missing phenomenon with respect to the sensor measurement (e.g., the terminal voltage) is taken into account for the addressed estimation issue. By introducing a stochastic variable obeying the Bernoulli distribution with a known probability, the random occurrence of the sensor measurement unavailability is well characterized. The second-order resistor-capacitor equivalent circuit model, where the model parameters are identified by the recursive least-squares method, is developed to govern the dynamical behaviors of a Lithium-ion battery. A data-unavailability-resistant nonlinear recursive filtering algorithm is proposed to estimate the real SOC in an unreliable industrial environment. An upper bound of the filtering error covariance is obtained, which is further minimized at each sampling instant. In addition, the filter gain is recursively parameterized by solving an optimization problem with respect to two coupled recursive Riccati-like equations, thereby being suitable for the online implementation. Finally, extensive experiments are conducted to demonstrate the validity of the proposed filtering approach.
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