Advanced Bidirectional Cell Balancing for Series-Connected Batteries using Buck-Boost Converters

The crucial problem of imbalance in series-connected batteries brought on by manufacturing variations in individual cells is addressed in this study. These imbalances may result in decreased usable capacity, shortened lifespan, and safety issues. A novel bidirectional cell balancing technique has been proposed to mitigate these effects. Using a switch-mode power converter, the proposed Cell Balancing Circuit effectively moves energy from larger cells to weaker ones, maintaining consistent voltage levels and State-of-Charge (SOC) for every cell. Theoretical analysis and simulation results validate the efficiency of this method, showing improved battery reliability and balancing performance.