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An Intermodular Active Balancing Topology for Efficient Operation of High Voltage Battery Packs in Li-Ion Based Energy Storage Systems: Switched (Flying) DC/DC Converter

Author

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  • Murat Ceylan

    (Department of Electronics Engineering, Gebze Technical University, 41400 Kocaeli, Turkey)

  • Abdulkadir Balikci

    (Department of Electronics Engineering, Gebze Technical University, 41400 Kocaeli, Turkey)

Abstract

To meet the load voltage and power requirements for various specific needs, a typical lithium–ion battery (LIB) pack consists of different parallel and series combinations of individual cells in modules, which can go as high as tens of series and parallel connections in each module, reaching hundreds and even thousands of cells at high voltage (HV) levels. The inhomogeneity among the cells and modules results in voltage imbalances during operation and reduces the overall system efficiency. In this work, a robust and flexible active balancing topology is presented. It can not only mitigate the charge imbalance within a module, i.e., intramodular equalization, but also help to balance the state of charge (SoC) level of the modules in a high voltage pack, i.e., intermodular equalization, which is an often-overlooked topic. The proposed concept was proven by experimental verification on parallel and series configurations of cells in realistically sized modules and practical battery management system (BMS) hardware, when the LIB was both idle and under load.

Suggested Citation

  • Murat Ceylan & Abdulkadir Balikci, 2023. "An Intermodular Active Balancing Topology for Efficient Operation of High Voltage Battery Packs in Li-Ion Based Energy Storage Systems: Switched (Flying) DC/DC Converter," Energies, MDPI, vol. 16(15), pages 1-22, July.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:15:p:5608-:d:1202365
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    References listed on IDEAS

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    2. Nestor A. Sepulveda & Jesse D. Jenkins & Aurora Edington & Dharik S. Mallapragada & Richard K. Lester, 2021. "The design space for long-duration energy storage in decarbonized power systems," Nature Energy, Nature, vol. 6(5), pages 506-516, May.
    3. Holger C. Hesse & Volkan Kumtepeli & Michael Schimpe & Jorn Reniers & David A. Howey & Anshuman Tripathi & Youyi Wang & Andreas Jossen, 2019. "Ageing and Efficiency Aware Battery Dispatch for Arbitrage Markets Using Mixed Integer Linear Programming †," Energies, MDPI, vol. 12(6), pages 1-28, March.
    4. Xiangwei Guo & Longyun Kang & Zhizhen Huang & Yuan Yao & Huizhou Yang, 2015. "Research on a Novel Power Inductor-Based Bidirectional Lossless Equalization Circuit for Series-Connected Battery Packs," Energies, MDPI, vol. 8(6), pages 1-22, June.
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    Cited by:

    1. Phuong-Ha La & Nguyen-Anh Nguyen & Sung-Jin Choi, 2024. "Average Model of Switched-Energy-Tank Battery Equalizer for Accelerated Performance Assessment," Energies, MDPI, vol. 17(3), pages 1-18, January.

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