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Energies 2018, 11(2), 405; doi:10.3390/en11020405

A Unified Control Strategy for Inductor-Based Active Battery Equalisation Schemes

Clean Energy Automotive Research Institute, Hefei University of Technology, Hefei 230009, China
School of Electrical and Data Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
Author to whom correspondence should be addressed.
Received: 27 January 2018 / Revised: 5 February 2018 / Accepted: 6 February 2018 / Published: 9 February 2018
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Series battery equalisation can improve battery charge and discharge reliability and extend battery life. Inductor-based battery equalisation schemes have the advantages of simple topologies and control strategies. According to the energy transfer pathway, inductor-based battery equalisation schemes can be divided into cell-to-cell and cell-to-pack equalisation schemes. The control strategies of the cell-to-cell schemes are simple; the inductor can only transfer energy between the neighbouring cells, so the equalisation speed is low. The cell-to-pack schemes are able to accomplish energy transfer between the cells and pack by charging and discharging the inductors. The equalisation speed is high, but the control strategies may be complex. In this paper, different equalisation topologies are reviewed, then a unified control strategy which is applicable to all of the inductor-based equalisation topologies is proposed. The equalisation speeds and efficiencies of these different schemes, including the newly-proposed unified control strategy, are analysed and compared. Based on the theoretical analysis, simulations, and experimental verifications, it is concluded that this unified control strategy can perform the battery equalisation process quickly and efficiently. View Full-Text
Keywords: electric vehicle; battery pack; equalisation topology; equalisation speed; equalisation efficiency electric vehicle; battery pack; equalisation topology; equalisation speed; equalisation efficiency

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liu, X.; Wan, Z.; He, Y.; Zheng, X.; Zeng, G.; Zhang, J. A Unified Control Strategy for Inductor-Based Active Battery Equalisation Schemes. Energies 2018, 11, 405.

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