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

Chol-Ho Kim; Hong-Sun Park; Chong-Eun Kim; Gun-Woo Moon; Joong-Hui Lee

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

Vol. 9, No. 3, pp. 472-480, May 2009

10.6113/JPE.2009.9.3.472

hybrid electric vehicle (HEV)

Charge equalization

Lithium-ion battery

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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.

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Cite this article

[IEEE Style]

C. Kim, H. Park, C. Kim, G. Moon, J. Lee, "Individual Charge Equalization Converter with Parallel Primary Winding of Transformer for Series Connected Lithium-Ion Battery Strings in an HEV," Journal of Power Electronics, vol. 9, no. 3, pp. 472-480, 2009. DOI: 10.6113/JPE.2009.9.3.472.

[ACM Style]

Chol-Ho Kim, Hong-Sun Park, Chong-Eun Kim, Gun-Woo Moon, and Joong-Hui Lee. 2009. Individual Charge Equalization Converter with Parallel Primary Winding of Transformer for Series Connected Lithium-Ion Battery Strings in an HEV. Journal of Power Electronics, 9, 3, (2009), 472-480. DOI: 10.6113/JPE.2009.9.3.472.