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Design of Voltage Equalization Circuit and Control Method for Lithium-ion Battery Packs

Qi Wang1,2,3, Lantian Ge1,*, Tianru Xie1, Yibo Huang1, Yandong Gu1, Tao Zhu1, Xuehua Gao1

1 School of Electrical and Information Engineering, Jiangsu University of Technology, Changzhou, 213001, China
2 Research and Development Department, Shuangdeng Group Co., Ltd., Taizhou, 225500, China
3 School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, 212013, China

* Corresponding Author: Lantian Ge. Email: email

(This article belongs to the Special Issue: Advanced Modelling, Operation, Management and Diagnosis of Lithium Batteries)

Energy Engineering 2025, 122(2), 733-746. https://doi.org/10.32604/ee.2024.059453

Abstract

The active equalization of lithium-ion batteries involves transferring energy from high-voltage cells to low-voltage cells, ensuring consistent voltage levels across the battery pack and maintaining safety. This paper presents a voltage balancing circuit and control method. First, a single capacitor method is used to design the circuit topology for energy transfer. Next, real-time voltage detection and control are employed to balance energy between cells. Finally, simulation and experimental results demonstrate the effectiveness of the proposed method, achieving balanced voltages of 3.97 V from initial voltages of 4.10, 3.97, and 3.90 V. The proposed circuit is simple, reliable, and effectively prevents overcharge and overdischarge.

Keywords

Lithium-ion battery; voltage balancing; control; single-capacitor method

Cite This Article

APA Style
Wang, Q., Ge, L., Xie, T., Huang, Y., Gu, Y. et al. (2025). Design of Voltage Equalization Circuit and Control Method for Lithium-ion Battery Packs. Energy Engineering, 122(2), 733–746. https://doi.org/10.32604/ee.2024.059453
Vancouver Style
Wang Q, Ge L, Xie T, Huang Y, Gu Y, Zhu T, et al. Design of Voltage Equalization Circuit and Control Method for Lithium-ion Battery Packs. Energ Eng. 2025;122(2):733–746. https://doi.org/10.32604/ee.2024.059453
IEEE Style
Q. Wang et al., “Design of Voltage Equalization Circuit and Control Method for Lithium-ion Battery Packs,” Energ. Eng., vol. 122, no. 2, pp. 733–746, 2025. https://doi.org/10.32604/ee.2024.059453



cc Copyright © 2025 The Author(s). Published by Tech Science Press.
This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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