Research on retired battery equalization system based on multi-objective adaptive fuzzy control algorithm

In the secondary utilization of retired batteries in energy storage systems, there exists a significant disparity between batteries, rendering battery pack susceptible to issues such as overcharging and overdischarging during charging discharging process. These challenges impose limitations on available capacity system may even give rise safety hazards. To tackle these issues, this study proposes design equalization specifically tailored for employed systems. A multilayer topology based buck-boost chopper circuit is introduced, along with multi-objective adaptive fuzzy control strategy. This strategy integrates open-circuit voltage-state charge (OCV-SOC) characteristic curve utilizes voltage SOC variables. It governs magnitude current pack’s state, enabling effective pack. Simulation results demonstrate that proposed does not rely precise mathematical model system. When compared mean-difference or single-variable strategy, it exhibits an enhanced rate. Consequently, fulfills practical application requirements equalizing packs.