Quasi-Resonant Zero-Current-Switching Bidirectional Converter for Battery Equalization Applications

A systematic approach to reform and analyze a soft-switching bidirectional dc-to-dc converter is proposed for cell voltage balancing control in a series connected battery string. quasi-resonant converter circuits have been designed to achieve the zero-current-switching (ZCS) to reduce the switching...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2006-09, Vol.21 (5), p.1213-1224
Main Authors: LEE, Yuang-Shung, CHENG, Guo-Tian
Format: Article
Language:English
Subjects:
Applied sciences
Batteries
Battery
Bidirectional
Circuits
Control systems
Converters
DC-DC power converters
Electric batteries
Electric currents
Electrical engineering. Electrical power engineering
Equalization
Equalizers
Exact sciences and technology
Individual cell equalizer (ICE)
Power electronics, power supplies
quasi-resonant zero-current switching (QRZCS)
Strings
Switches
Switching
Switching converters
Switching loss
Transistors
Voltage control
Zero current switching
Zero voltage switching
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Summary:A systematic approach to reform and analyze a soft-switching bidirectional dc-to-dc converter is proposed for cell voltage balancing control in a series connected battery string. quasi-resonant converter circuits have been designed to achieve the zero-current-switching (ZCS) to reduce the switching loss in bidirectional battery equalizers. The results indicate that the switching loss and energy transfer efficiency can be substantially improved using the quasi-resonant ZCS (QRZCS) technology in a battery charging system with an individual cell equalizer (ICE). The validity of the battery equalization is further verified using an experimental installation involving a battery string of three lithium-ion cells. The simulation and experimental results show that the proposed QRZCS battery equalization schemes can achieve bidirectional battery equalization performance and reduce the MOSFET transistor switch power losses by more than 96% and increase the efficiency by around 20%~30% compared with the conventional battery equalizer during an identical equalization process
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2006.880349