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Converter with Automatic Voltage Balancing Capability for Series-connected Energy Storage Cells
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Xiaoguang YANG1, 2, Jiabao LI1, 2, Baoxin NIE3, Yujie LU1, 2, Xuebiao LI1, 2
Journal of Power Supply | 2026, 24(7) : 39 - 51
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Journal of Power Supply | 2026, 24(7): 39-51
• Power Converter Topologies •
Converter with Automatic Voltage Balancing Capability for Series-connected Energy Storage Cells
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Xiaoguang YANG1, 2, Jiabao LI1, 2, Baoxin NIE3, Yujie LU1, 2, Xuebiao LI1, 2
Affiliations
  • 1.State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China
  • 2.Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology, Tianjin 300130, China
  • 3.State Grid Beijing Miyun Electric Power Supply Company, Beijing 101500, China
Published: 2026-07-30 doi: 10.13234/j.issn.2095-2805.2026.7.39
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Traditional energy storage systems typically include a charging/discharging converter and an equalizer, which are independent of each other. To reduce system complexity and the number of components, a converter for energy storage systems is proposed, which integrates an equalizer into a charge/discharge converter, and achieves automatic voltage balancing between series-connected batteries without the need for voltage measurement circuits, thereby reducing components and simplifying the system. There are two types of proposed converters: type A contains only one active switch, one n-winding inductor and n diodes; type B replaces n diodes in type A with n active switches to improve the efficiency of the circuit. The similarities and differences between type A and type B converter are comparable to those between the asynchronous and the synchronous Buck converter, type B is mainly analyzed and developed a prototype. The experimental results indicate that the proposed converter has good voltage balancing characteristics.

Balancing  /  equalization circuit  /  equalizer  /  multi-winding transformer  /  multi-winding inductor
杨晓光, 李家宝, 聂宝鑫, 芦宇杰, 李学彪. 应用于串联储能电池的具有电压自动均衡能力的变换器. 电源学报, 2026 , 24 (7) : 39 -51 . DOI: 10.13234/j.issn.2095-2805.2026.7.39
Xiaoguang YANG, Jiabao LI, Baoxin NIE, Yujie LU, Xuebiao LI. Converter with Automatic Voltage Balancing Capability for Series-connected Energy Storage Cells[J]. Journal of Power Supply, 2026 , 24 (7) : 39 -51 . DOI: 10.13234/j.issn.2095-2805.2026.7.39
Appendix
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Year 2026 volume 24 Issue 7
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Article Info
doi: 10.13234/j.issn.2095-2805.2026.7.39
  • Receive Date：2024-07-25
  • Online Date：2026-10-29
  • Published：2026-07-30
Article Data
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History
  • Received：2024-07-25
  • Revised：2024-09-16
  • Accepted：2024-09-27
Affiliations
    1.State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China
    2.Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology, Tianjin 300130, China
    3.State Grid Beijing Miyun Electric Power Supply Company, Beijing 101500, China
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