Overview of active and passive cell balancing methods of batteries employed in electric vehicles

The work focuses on an overview of conventional passive cell balancing method named switched resistors balancing and active cell balancing methods based on converters such as resonant converter-based balancing and fly back converter-based balancing for batteries in electric vehicles in terms of its performance. These methods were made to perform continuous cell balancing during charging, discharging and idle conditions. To evaluate the relationship of these methods with battery performance, a Simulink model is developed and simulated in MatLab. A comparative study is made between various methods of cell balancing based on the performance specifications namely efficiency and the time taken to achieve the balancing.