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A Layered Parallel Equaliser Based on Flyback Transformer Multiplexed for Lithium-Ion Battery System

Author

Listed:
  • Hongrui Liu

    (Faculty of Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China)

  • Xiangyang Wei

    (Faculty of Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China)

  • Junjie Ai

    (Faculty of Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China)

  • Xudong Yang

    (Faculty of Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China)

Abstract

An effective equaliser is crucial for eliminating inconsistencies in the connected serial batteries and extending the life of the battery system. The current equalisers generally have the problems of low equalisation efficiency, slow equalisation speed, and complex switching control. A layered parallel equaliser based on a flyback transformer multiplexed for a lithium-ion battery system is proposed. The equaliser employs both hierarchical and parallel equalisation techniques, allowing for simultaneous processing of multiple objectives. This enhances both the efficiency and speed of the equalisation process. The efficiency of equalisation can be further improved by implementing PWM control with deadband complement. Additionally, the flyback transformer serves as an energy storage component for both layers of the equalisation module, resulting in a significant reduction in the size and cost of the equaliser. The circuit topology of the equaliser is presented, and its operational principle, switching control, and equalisation control strategy are analysed in detail. Finally, an experimental platform consisting of six lithium-ion batteries is constructed, and equalisation experiments are conducted to verify the advantages of the proposed equaliser in terms of equalisation speed, efficiency, and cost.

Suggested Citation

  • Hongrui Liu & Xiangyang Wei & Junjie Ai & Xudong Yang, 2024. "A Layered Parallel Equaliser Based on Flyback Transformer Multiplexed for Lithium-Ion Battery System," Energies, MDPI, vol. 17(3), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:3:p:754-:d:1333750
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    References listed on IDEAS

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    1. Jie Deng & Chulheung Bae & James Marcicki & Alvaro Masias & Theodore Miller, 2018. "Safety modelling and testing of lithium-ion batteries in electrified vehicles," Nature Energy, Nature, vol. 3(4), pages 261-266, April.
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