Improved Battery Balancing Control Strategy for Reconfigurable Converter Systems

Guangwei Wan, Qiang Zhang (), Menghan Li, Siyuan Li (), Zehao Fu, Junjie Liu and Gang Li
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Guangwei Wan: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Qiang Zhang: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Menghan Li: School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
Siyuan Li: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Zehao Fu: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Junjie Liu: School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Gang Li: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China

Energies, 2023, vol. 16, issue 15, 1-21

Abstract: In order to address the issue of battery cell disparity in lithium-ion battery systems, battery balancing techniques are required. This paper proposes an improved battery balancing strategy within a reconfigurable converter system. The strategy is based on the state of charge (SOC) of batteries, and utilizes the reconfigurable converter system to transfer energy from battery modules with high SOC to those with lower SOC. Additionally, it allows for battery module balancing while supplying power to loads. A MATLAB/Simulink simulation model with five batteries was built to validate the effectiveness of the proposed balancing strategy under unloaded and loaded conditions. The simulation results demonstrate that the proposed strategy achieves more efficient and accurate battery module balancing compared to the previous balancing modes.

Keywords: reconfigurable battery; balancing; integrated converter; state of charge (SOC) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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