The battery equalization system can solve the phenomenon of battery imbalance observed in new energy vehicles, enhance the capacity of the battery pack, and achieve equalization during the charging and discharging process. Additionally, it has the ability to virtually uniformly behave each and every cell in the battery pack. This thesis presents a DC-DC based battery active equalization system that combines various optocouplers and switching components to choose particular cells in the battery pack for energy transfer. A battery pack that uses three lithium battery cells is simulated and verified. A physical circuit board is created in order to equalize sixteen cell batteries. The results show that the battery equalization system can achieve a continuous equalization current of up to 2A, rapid equalization speed, and 80% power transfer efficiency, making it exceptionally excellent for the equalization of high-capacity battery systems in electric automobiles.
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Zhou et al. (2024) studied this question.
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