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Individual Charge Equalization Converter with Parallel Primary Winding of Transformer for Series Connected Lithium-Ion Battery Strings in an HEV  

Kim, Chol-Ho (Department of Electrical Engineering and Computer Science, KAIST)
Park, Hong-Sun (Department of Electrical Engineering and Computer Science, KAIST)
Kim, Chong-Eun (Department of Electrical Engineering and Computer Science, KAIST)
Moon, Gun-Woo (Department of Electrical Engineering and Computer Science, KAIST)
Lee, Joong-Hui (SK Institute of Technology)
Publication Information
Journal of Power Electronics / v.9, no.3, 2009 , pp. 472-480 More about this Journal
Abstract
In this paper, a charge equalization converter with parallel-connected primary windings of transformers is proposed. The proposed work effectively balances the voltage among Lithium-Ion battery cells despite each battery cell has low voltage gap compared with its state of charge (SOC). The principle of the proposed work is that the equalizing energy from all battery strings moves to the lowest voltage battery through the isolated dc/dc converter controlled by the corresponding solid state relay switch. For this research a prototype of four Lithium-Ion battery cells is optimally designed and implemented, and experimental results show that the proposed method has excellent cell balancing performance.
Keywords
Hybrid electric vehicle (HEV); Charge equalization; Lithium-ion battery;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 9  (Related Records In Web of Science)
Times Cited By SCOPUS : 22
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