Lithium-ion battery cell-level control using constrained model predictive control and equivalent circuit models

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Abstract

Abstract This paper introduces a novel application of model predictive control (MPC) to cell-level charging of a lithium-ion battery utilizing an equivalent circuit model of battery dynamics. The approach employs a modified form of the MPC algorithm that caters for direct feed-though signals in order to model near-instantaneous battery ohmic resistance. The implementation utilizes a 2nd-order equivalent circuit discrete-time state-space model based on actual cell parameters; the control methodology is used to compute a fast charging profile that respects input, output, and state constraints. Results show that MPC is well-suited to the dynamics of the battery control problem and further suggest significant performance improvements might be achieved by extending the result to electrochemical models.

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Xavier, M. A., & Trimboli, M. S. (2015). Lithium-ion battery cell-level control using constrained model predictive control and equivalent circuit models. Journal of Power Sources, 285, 374–384. https://doi.org/10.1016/j.jpowsour.2015.03.074

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