LAPSE:2018.0873
Published Article
LAPSE:2018.0873
An Automatic Switched-Capacitor Cell Balancing Circuit for Series-Connected Battery Strings
Yuanmao Ye, Ka Wai Eric Cheng
November 27, 2018
In this paper, a novel voltage equalizer is developed for series battery strings based on the two-phase switched capacitor technique. Different from the conventional voltage equalizers which are developed by switched-mode power converters, bulky magnetic components and complex monitoring and control system are avoided in the proposed system. Just a pair of complementary pulse signals with constant switching frequency and fixed duty ratio are required to control all of switches employed in the proposed voltage equalizer, and charge transfers from the higher voltage battery cells to lower voltage ones automatically. The circuit configuration and operation principle are provided in this paper. The model of the proposed voltage equalizer is also derived. Comparison with other works indicates that the proposed method is superior to the conventional switched-capacitor (SC) voltage equalizer for the high stack of series battery strings. Experimental results demonstrate that the proposed voltage equalization system is capable of excellent voltage balancing performance with a simple control method.
Keywords
battery, battery management system (BMS), energy storage system, switched-capacitor (SC), voltage balancing
Suggested Citation
Ye Y, Cheng KWE. An Automatic Switched-Capacitor Cell Balancing Circuit for Series-Connected Battery Strings. (2018). LAPSE:2018.0873
Author Affiliations
Ye Y: Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
Cheng KWE: Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
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Journal Name
Energies
Volume
9
Issue
3
Article Number
E138
Year
2016
Publication Date
2016-02-27
Published Version
ISSN
1996-1073
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Original Submission
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PII: en9030138, Publication Type: Journal Article
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LAPSE:2018.0873
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doi:10.3390/en9030138
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Nov 27, 2018
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[v1] (Original Submission)
Nov 27, 2018
 
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Calvin Tsay
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