Akademik Veri Yönetim Sistemi
JOURNAL OF POLYTECHNIC-POLITEKNIK DERGISI, cilt.25, sa.4, ss.1487-1494, 2022 (ESCI)
The battery balancing systems are essential for balanced charging and discharging the battery cells. Lifecyle, efficiency and safety of battery packs can be increased by balancing systems. Battery balancing systems are divided into two group as passive and active. In passive balancing systems the amount of charge causing imbalance between cells is discharged by a resistor while in active balancing sytems imbalance between the cells is eliminated by transferring energy from high state of charge cell to low one. Increasing number of cells is led to complexity of balancing systems. Converter based balancing systems present a feasible solution to battery packs with a large number of cells. In this study, a bidirectional flyback converter in order to use in battery active balancing systems has been developed. Simulation and test results revealed that the developed bidirectional flyback converter is suitable for battery active balancing systems. The highest efficiencies were obtained as 67.84% at 32.5% duty cycle at charge test and 66.02% at 50% duty cycle at discharge test.