DefinePK

Abstract

This paper presents an implementation of an active battery balancing method using fly-back transformer. The need for balancing the batteries in series is to reduce damage to the battery string and to increase its life span. The proposed charge equalization method utilizes active switches and a multi-input single output fly-back transformer to transfer energy between the batteries. The equalizer achieves voltage and State of Charge (SoC) balance of batteries with same ratings. The method utilizes excess energy from charged cell to charge the other cells making it more efficient and use of single DC-DC boost converter with a fly-back transformer makes it compact and cheaper to implement. The method is proved by MatLab simulation and validated by hardware implementation.