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A Novel Layered Bidirectional Equalizer Based on a Buck-Boost Converter for Series-Connected Battery Strings

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Listed:
  • Shubiao Wang

    (New Energy Research Center, School of Electric Power, South China University of Technology, Guangzhou 510640, China
    Guangdong Key Laboratory of Clean Energy Technology, School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Longyun Kang

    (New Energy Research Center, School of Electric Power, South China University of Technology, Guangzhou 510640, China
    Guangdong Key Laboratory of Clean Energy Technology, School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Xiangwei Guo

    (College of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China)

  • Zefeng Wang

    (New Energy Research Center, School of Electric Power, South China University of Technology, Guangzhou 510640, China
    Guangdong Key Laboratory of Clean Energy Technology, School of Electric Power, South China University of Technology, Guangzhou 510640, China)

  • Ming Liu

    (New Energy Research Center, School of Electric Power, South China University of Technology, Guangzhou 510640, China
    Guangdong Key Laboratory of Clean Energy Technology, School of Electric Power, South China University of Technology, Guangzhou 510640, China)

Abstract

To eliminate the influence of the inconsistency on the cycle life and the available capacity of battery packs, and improve the balancing speed, a novel inductor-based layered bidirectional equalizer (IBLBE) is proposed. The equalizer is composed of two layers of balancing circuits connected in parallel. Each layer contains multiple balancing sub-circuits based on buck-boost converters. These balancing sub-circuits can equalize the corresponding cells simultaneously, and allow the dynamic adjustment of equalization path and equalization threshold. Analysis and simulation results demonstrate the IBLBE has a higher level balancing speed than other equalizers based on switched-capacitor or switched-inductor converters, and reduces the balancing time by 30% compared to existing inductor-based parallel architecture equalizers (PAEs). Experimental results are presented to validate the analysis and effectiveness of the proposed equalizer.

Suggested Citation

  • Shubiao Wang & Longyun Kang & Xiangwei Guo & Zefeng Wang & Ming Liu, 2017. "A Novel Layered Bidirectional Equalizer Based on a Buck-Boost Converter for Series-Connected Battery Strings," Energies, MDPI, vol. 10(7), pages 1-15, July.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:1011-:d:104936
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    References listed on IDEAS

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    1. Wenbiao Li & Longyun Kang & Xiangwei Guo & Yuan Yao, 2016. "Multi-Objective Predictive Balancing Control of Battery Packs Based on Predictive Current," Energies, MDPI, vol. 9(4), pages 1-12, April.
    2. 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.
    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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    Cited by:

    1. Das, Utpal Kumar & Shrivastava, Prashant & Tey, Kok Soon & Bin Idris, Mohd Yamani Idna & Mekhilef, Saad & Jamei, Elmira & Seyedmahmoudian, Mehdi & Stojcevski, Alex, 2020. "Advancement of lithium-ion battery cells voltage equalization techniques: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
    2. Chusheng Lu & Longyun Kang & Xuan Luo & Jinqing Linghu & Hongye Lin, 2019. "A Novel Lithium Battery Equalization Circuit with Any Number of Inductors," Energies, MDPI, vol. 12(24), pages 1-14, December.
    3. Turksoy, Arzu & Teke, Ahmet & Alkaya, Alkan, 2020. "A comprehensive overview of the dc-dc converter-based battery charge balancing methods in electric vehicles," Renewable and Sustainable Energy Reviews, Elsevier, vol. 133(C).
    4. Chusheng Lu & Longyun Kang & Shubiao Wang & Zefeng Wang & Huabing Rao, 2018. "A Novel Inductor-Based Non-Dissipative Equalizer," Energies, MDPI, vol. 11(10), pages 1-14, October.
    5. Xintian Liu & Yafei Sun & Yao He & Xinxin Zheng & Guojian Zeng & Jiangfeng Zhang, 2017. "Battery Equalization by Fly-Back Transformers with Inductance, Capacitance and Diode Absorbing Circuits," Energies, MDPI, vol. 10(10), pages 1-16, September.
    6. Xiaogang Wu & Zhihao Cui & Xuefeng Li & Jiuyu Du & Ye Liu, 2019. "Control Strategy for Active Hierarchical Equalization Circuits of Series Battery Packs," Energies, MDPI, vol. 12(11), pages 1-18, May.
    7. Shungang Xu & Kai Gao & Xiaobing Zhang & Kangle Li, 2019. "Double-Layer E-Structure Equalization Circuit for Series Connected Battery Strings," Energies, MDPI, vol. 12(22), pages 1-16, November.
    8. 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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