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Optimal CC-CV charging of lithium-ion battery for charge equalization controller

This paper proposes a lithium-ion battery charging technique for the charge equalization controller based on the particle swarm optimization (PSO) algorithm. A flyback DC-DC converter is utilized to perform the charge equalization and battery charging. The charging of lithium-ion battery is executed by constant current-constant voltage (CC-CV) charge PI control process. In the proposed technique, the PSO algorithm is used to attain the best and optimal values of the PI controller parameters. The optimized PI controller regulates the PWM signal to the MOSFET switching drive of the converter for quality CC-CV charging of the lithium-ion battery, so that it reduces the memory effect, and thus, enhances the performance of lithium-ion battery and equalization. The proposed charging technique for efficient charge equalization controller is applicable in energy storage applications toward the sustainable electric vehicle development.