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An active bidirectional balancer with power distribution control strategy based on state of charge for Lithium-ion battery pack

Author

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  • Luo, Yi-Feng
  • Chen, Guan-Jhu
  • Liu, Chun-Liang
  • Chen, Ya-Shuo
  • Hsieh, Hua-Sheng

Abstract

Promotion green energy has driven the development of energy storage systems (ESS) and electric vehicles (EVs), both of which can significantly reduce environmental pollution. However, the use of multiple battery cells within a battery pack can lead to imbalances, resulting in uneven capacity or voltage among the cells. To mitigate this issue, battery balancers are necessary to maintain equilibrium among the cells in a battery pack. This paper presents the development of four sets of bidirectional buck-boost DC-DC converters that activate a balancing mechanism when the capacity difference exceeds a certain threshold. The balancing mechanism is based on the state of charge (SOC), ensuring that load power is effectively distributed during discharge and that charging current is distributed during charging.

Suggested Citation

  • Luo, Yi-Feng & Chen, Guan-Jhu & Liu, Chun-Liang & Chen, Ya-Shuo & Hsieh, Hua-Sheng, 2025. "An active bidirectional balancer with power distribution control strategy based on state of charge for Lithium-ion battery pack," Applied Energy, Elsevier, vol. 377(PD).
    • Handle: RePEc:eee:appene:v:377:y:2025:i:pd:s0306261924020440
    DOI: 10.1016/j.apenergy.2024.124661
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    References listed on IDEAS

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    1. Huang, Huizhen & Ghias, Amer M.Y.M. & Acuna, Pablo & Dong, Zhaoyang & Zhao, Junhua & Reza, Md. Shamim, 2024. "A fast battery balance method for a modular-reconfigurable battery energy storage system," Applied Energy, Elsevier, vol. 356(C).
    2. Jun Xu & Siqi Li & Chris Mi & Zheng Chen & Binggang Cao, 2013. "SOC Based Battery Cell Balancing with a Novel Topology and Reduced Component Count," Energies, MDPI, vol. 6(6), pages 1-15, May.
    3. Yuanmao Ye & Ka Wai Eric Cheng, 2016. "An Automatic Switched-Capacitor Cell Balancing Circuit for Series-Connected Battery Strings," Energies, MDPI, vol. 9(3), pages 1-15, February.
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