A New Variable Switching Frequency Control For Active Cell Balancing Systems

This paper presents a new active cell balancing control method at the Battery Management System (BMS) for Electric Vehicle (EV). Through the charging and discharging current sensing, the proposed method modulates the switching frequency for the controlling an active balancing circuit. Consequently, the active cell balancing speed is improved. To verify the effectiveness of the proposed methodology, the Labview simulation was implemented; the balancing speed were 50% higher than the conventional fixed frequency control method.