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An Active Cascaded Battery Voltage Balancing Circuit Based on Multi-Winding Transformer with Small Magnetizing Inductance

Author

Listed:
  • Young-Hwa Park

    (Hyundai & Kia Motors Namyang Institute, Hwaseong 18280, Korea)

  • Rae-Young Kim

    (The Department of Electrical and Biomedical Engineering, Hanyang University, Seoul 04763, Korea)

  • Yeong-Jun Choi

    (The Department of Electrical Engineering, Jeju National University, Jeju 63243, Korea)

Abstract

This paper covers the active voltage balancing method of secondary batteries. The number of applications using secondary batteries is increasing, and the batteries are normally connected in series/parallel to increase discharge cycle and power. The problem is that when there is a voltage imbalance between the cells or modules of a battery, there is a risk of an accident in the near-sighted way, shortening the life of the battery cells. Although this risk was prevented through passive balancing, this approach has limitations, including heat generation, long balancing time, and in the case of a battery that needs to be balanced between modules (or between stacks), its effectiveness decreases. Therefore, in this paper, an active cell balancing method that can overcome the limitations mentioned before is proposed. The proposed method uses a multi-winding transformer, and to increase the power density, the magnetizing inductance is decreased, and an auxiliary circuit is added. The validity of the proposed circuit was verified through mode analysis and simulation. In addition, waveforms showing the balancing performance under various conditions and the comparison results between conventional and proposed methods are given.

Suggested Citation

  • Young-Hwa Park & Rae-Young Kim & Yeong-Jun Choi, 2021. "An Active Cascaded Battery Voltage Balancing Circuit Based on Multi-Winding Transformer with Small Magnetizing Inductance," Energies, MDPI, vol. 14(5), pages 1-17, February.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:5:p:1302-:d:506965
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    References listed on IDEAS

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    1. Hannan, M.A. & Hoque, M.M. & Mohamed, A. & Ayob, A., 2017. "Review of energy storage systems for electric vehicle applications: Issues and challenges," Renewable and Sustainable Energy Reviews, Elsevier, vol. 69(C), pages 771-789.
    2. Yeong-Jun Choi & Hwa-Rang Cha & Sang-Min Jung & Rae-Young Kim, 2018. "An Integrated Current-Voltage Compensator Design Method for Stable Constant Voltage and Current Source Operation of LLC Resonant Converters," Energies, MDPI, vol. 11(6), pages 1-18, May.
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