Inverting Quasi-Resonant Switched-Capacitor Bidirectional Converter and Its Application to Battery Equalization

Yuang-Shung LEE  Yin-Yuan CHIU  Ming-Wang CHENG  Yi-Pin KO  Sung-Hsin HSIAO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E92-B   No.4   pp.1326-1336
Publication Date: 2009/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.1326
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Energy in Electronics Communications
Keyword: 
quasi-resonant converter,  zero current switching,  bidirectional converter,  battery management system,  battery equalization,  

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Summary: 
The proposed quasi-resonant (QR) zero current switching (ZCS) switched-capacitor (SC) converter is a new type of bidirectional power flow control conversion scheme. The proposed converter is able to provide voltage conversion ratios from -3/- (triple-mode/ trisection-mode) to -n/- (-n-mode/--mode) by adding a different number of switched-capacitors and power MOSFET switches with a small series connected resonant inductor for forward and reverse power flow control schemes. It possesses the advantages of low switching losses and current stress in this QR ZCS SC converter. The principle of operation, theoretical analysis of the proposed triple-mode/ trisection-mode bidirectional power conversion scheme is described in detail with circuit model analysis. Simulation and experimental studies are carried out to verify the performance of the proposed inverting type ZCS SC QR bidirectional converter. The proposed converters can be applied to battery equalization for battery management system (BMS).