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A String-to-Cell Battery Equalizer Based on Fixed-Frequency LCC Resonant Converter

delete2020-03-01
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PRE
AI
Z
Zhengqi Wei
F
Faxiang Peng
H
Haoyu Wang *
DOI:10.1109/apec39645.2020.9124472delete
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Abstract

Abstract

En 中文
Battery equalization technology can effectively mitigate inconsistency in battery strings. In this paper, an LCC resonant converter based string-to-cell (S2C) battery equalizer is proposed to achieve easy-control battery equalization. This equalization scheme utilizes a common equalizer shared by each unbalanced cell to transfer energy from the entire string to a single cell. The proposed equalizer achieves a constant balancing current with simple fixed-frequency open-loop control. The constant balancing current facilitates a fixed equalization speed. The design considerations of the proposed equalizer are analyzed in detail, which ensures zero-voltage switching (ZVS) among all MOSFETs during the equalization process. An experimental platform to balance four Lithium-Ion battery cells is designed to verify the system performance. Experimental results validate the functionality and analysis of this battery equalizer.
Keywords:
Battery equalizers
battery management system
LCC converter
electric vehicles
ZVS
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Journal

I
IEEE Applied Power Electronics Conference and Exposition
IF:
0
Papers:
281
Citations:
0

Organization

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ShanghaiTech University
Scholars:
9.6K
Papers: 5.9K
Citations: 1.6W