TITLE:
A Modularizable High-Frequency Battery Equalizer with Multi-Winding Transformer for Energy Storage Systems
AUTHORS:
Chihchiang Hua, Jianbin Lai, Zhewei Zhang
KEYWORDS:
Battery Equalizer, High Switching Frequency, Multi-Winding Transformer
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.14 No.12,
December
31,
2024
ABSTRACT: This paper proposes an improved modularizable high-frequency battery equalizer with multi-winding transformer for energy storage systems. The involvement of parasitic components in circuit resonance, along with the addition of a resonant network, enables soft-switching for the power switches to reduce the switch voltage stress due to high frequency switching operation. The proposed circuit is designed to operate at switching frequency of 1 MHz. The detailed analysis of circuit operation is provided. At last, the feasibility and performance of the proposed battery equalizer are demonstrated through the system implementation and experimental tests of a prototype circuit. Experimental results have shown zero voltage switching (ZVS) is achieved on the switches.