Electrochemical Model-Based Fast Charging: Physical Constraint-Triggered PI Control
نویسندگان
چکیده
This paper proposes a new fast chargingstrategy for lithium-ion (Li-ion) batteries. The approach relies on an experimentally validated high-fidelity model describing battery electrochemical and thermal dynamics that determine the charging capability. Such high-dimensional nonlinear dynamic can be intractable to compute in real-time if it is fused with extended Kalman filter or unscented commonly used community of management. To significantly save computational efforts achieve rapid convergence, ensemble transform (ETKF) selected tailored estimate nonuniform Li-ion states. Then, health- safety-aware protocol proposed based successively applied proportional-integral (PI) control actions. controller regulates rates using online state information imposed constraints, which each PI action automatically comes into play when its corresponding constraint triggered. physical constraint-triggered strategy ETKF evaluated compared several prevalent alternatives. It shows derived close optimal solution terms time trajectory, as determined by predictive controller, but at drastically reduced cost.
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ژورنال
عنوان ژورنال: IEEE Transactions on Energy Conversion
سال: 2021
ISSN: ['1558-0059', '0885-8969']
DOI: https://doi.org/10.1109/tec.2021.3065983