Design and analysis of an inductor-less cross-coupled voltage equalizer

To equalize the imbalance in the state-of-charge (SoC) of lithium-ion cells, we propose a novel inductor-less cross-coupled voltage equalizer for series-connected batteries. Unlike existing symmetrical voltage equalizers using diode switches, the proposed voltage equalizer can balance the voltage of...

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Bibliographic Details
Published inEnergy reports Vol. 6; pp. 1151 - 1156
Main Authors Eguchi, Kei, Shibata, Akira, Do, Wanglok, Asadi, Farzin
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.12.2020
Elsevier
Subjects
Battery cells
Cross-coupled structure
Inductor-less circuits
Symmetrical structure
Voltage equalizers
Cross-coupled structure
Battery cells
Voltage equalizers
Inductor-less circuits
Symmetrical structure
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Summary:To equalize the imbalance in the state-of-charge (SoC) of lithium-ion cells, we propose a novel inductor-less cross-coupled voltage equalizer for series-connected batteries. Unlike existing symmetrical voltage equalizers using diode switches, the proposed voltage equalizer can balance the voltage of battery cells without a threshold voltage drop, because the diode-less design is realized by the cross-coupled structure. The performance of the proposed voltage equalizer is clarified by theoretical analysis, computer simulations, and breadboard-based experimental tests. The computer simulations and experiments reveal that the proposed voltage equalizer outperforms conventional inductor-less voltage equalizers.
ISSN:2352-4847
2352-4847
DOI:10.1016/j.egyr.2020.11.061