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    • Multicell-to-Multicell Equalizer with Hybrid Pulsewidth Modulation and Phase-Shift Modulation

    Guo Xu, Enze Chen,Fulin Liu,Yonglu Liu,Wenjing Xiong,Mei Su

    IEEE TRANSACTIONS ON POWER ELECTRONICS（2024）

    Cent South Univ

    Cited 0|Views5
    Abstract
    In this article, an any-cells-to-any-cells equalizer based on the multiwinding transformer is proposed to reduce the component number and increase the balancing speed. Every two adjacent cells only require two mosfets and one transformer winding to construct a buck-boost converter, and several two-cell groups construct a multiactive bridge converter, which achieves a low component number. By modulating the duty cycle and phase-shift ratio, the equalization between different cells can occur simultaneously, which achieves fast balancing speed. In addition, a current distribution strategy is designed in detail, which ensures that the balancing current of each cell is under modulation during the equalization process. Finally, a prototype, including six lithium-ion cells, is established. The experimental and comparative results verify the correctness of the theoretical analysis.
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    Key words
    Any-cells-to-any-cells (AC2AC) mode,fast equalizer,multiwinding transformer,phase-shifting modulation
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