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A Cell-to-Cell Equalizer Based on Three-Resonant-State Switched-Capacitor Converters for Series-Connected Battery Strings

Author

Listed:
  • Yunlong Shang

    (School of Control Science and Engineering, Shandong University, Jinan 250061, China)

  • Qi Zhang

    (School of Control Science and Engineering, Shandong University, Jinan 250061, China)

  • Naxin Cui

    (School of Control Science and Engineering, Shandong University, Jinan 250061, China)

  • Chenghui Zhang

    (School of Control Science and Engineering, Shandong University, Jinan 250061, China)

Abstract

Due to the low cost, small size, and ease of control, the switched-capacitor (SC) battery equalizers are promising among active balancing methods. However, it is difficult to achieve the full cell equalization for the SC equalizers due to the inevitable voltage drops across Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET) switches. Moreover, when the voltage gap among cells is larger, the balancing efficiency is lower, while the balancing speed becomes slower as the voltage gap gets smaller. In order to soften these downsides, this paper proposes a cell-to-cell battery equalization topology with zero-current switching (ZCS) and zero-voltage gap (ZVG) among cells based on three-resonant-state SC converters. Based on the conventional inductor-capacitor (LC) converter, an additional resonant path is built to release the charge of the capacitor into the inductor in each switching cycle, which lays the foundations for obtaining ZVG among cells, improves the balancing efficiency at a large voltage gap, and increases the balancing speed at a small voltage gap. A four-lithium-ion-cell prototype is applied to validate the theoretical analysis. Experiment results demonstrate that the proposed topology has good equalization performances with fast equalization, ZCS, and ZVG among cells.

Suggested Citation

  • Yunlong Shang & Qi Zhang & Naxin Cui & Chenghui Zhang, 2017. "A Cell-to-Cell Equalizer Based on Three-Resonant-State Switched-Capacitor Converters for Series-Connected Battery Strings," Energies, MDPI, vol. 10(2), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:2:p:206-:d:90081
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    References listed on IDEAS

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    4. 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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    Cited by:

    1. João P. D. Miranda & Luis A. M. Barros & José Gabriel Pinto, 2023. "A Review on Power Electronic Converters for Modular BMS with Active Balancing," Energies, MDPI, vol. 16(7), pages 1-20, April.
    2. Alfredo Alvarez-Diazcomas & Adyr A. Estévez-Bén & Juvenal Rodríguez-Reséndiz & Miguel-Angel Martínez-Prado & Roberto V. Carrillo-Serrano & Suresh Thenozhi, 2020. "A Review of Battery Equalizer Circuits for Electric Vehicle Applications," Energies, MDPI, vol. 13(21), pages 1-29, October.
    3. Rui Xiong & Hailong Li & Xuan Zhou, 2017. "Advanced Energy Storage Technologies and Their Applications (AESA2017)," Energies, MDPI, vol. 10(9), pages 1-3, September.
    4. Mahammad A. Hannan & Mohammad M. Hoque & Pin J. Ker & Rawshan A. Begum & Azah Mohamed, 2017. "Charge Equalization Controller Algorithm for Series-Connected Lithium-Ion Battery Storage Systems: Modeling and Applications," Energies, MDPI, vol. 10(9), pages 1-20, September.
    5. Yat Chi Fong & Ka Wai Eric Cheng & S. Raghu Raman & Xiaolin Wang, 2018. "Multi-Port Zero-Current Switching Switched-Capacitor Converters for Battery Management Applications," Energies, MDPI, vol. 11(8), pages 1-17, July.
    6. Masatoshi Uno & Masahiko Inoue & Yusuke Sato & Hikaru Nagata, 2018. "Bidirectional Interleaved PWM Converter with High Voltage-Conversion Ratio and Automatic Current Balancing Capability for Single-Cell Battery Power System in Small Scientific Satellites," Energies, MDPI, vol. 11(10), pages 1-12, October.
    7. Sang-Won Lee & Yoon-Geol Choi & Bongkoo Kang, 2019. "Active Charge Equalizer of Li-Ion Battery Cells Using Double Energy Carriers," Energies, MDPI, vol. 12(12), pages 1-13, June.
    8. Xintian Liu & Zhihao Wan & Yao He & Xinxin Zheng & Guojian Zeng & Jiangfeng Zhang, 2018. "A Unified Control Strategy for Inductor-Based Active Battery Equalisation Schemes," Energies, MDPI, vol. 11(2), pages 1-16, February.
    9. Shun-Chung Wang & Chun-Yu Liu & Yi-Hua Liu, 2018. "A Fast Equalizer with Adaptive Balancing Current Control," Energies, MDPI, vol. 11(5), pages 1-15, April.

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