Control Strategy for Active Hierarchical Equalization Circuits of Series Battery Packs

Most series battery active equalization circuits implement the equalization first within the series and then between the series, which restricts the equilibrium speed. A hierarchical equalization circuit topology based on the Buck-Boost module is applied in this paper. The equalization is divided in...

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Main Authors: Xiaogang Wu, Zhihao Cui, Xuefeng Li, Jiuyu Du, Ye Liu
Format: Article
Language:English
Published: MDPI AG 2019-05-01
Series:Energies
Subjects:
Online Access:https://www.mdpi.com/1996-1073/12/11/2071
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author Xiaogang Wu
Zhihao Cui
Xuefeng Li
Jiuyu Du
Ye Liu
author_facet Xiaogang Wu
Zhihao Cui
Xuefeng Li
Jiuyu Du
Ye Liu
author_sort Xiaogang Wu
collection DOAJ
description Most series battery active equalization circuits implement the equalization first within the series and then between the series, which restricts the equilibrium speed. A hierarchical equalization circuit topology based on the Buck-Boost module is applied in this paper. The equalization is divided into two different equalization processes according to the equilibrium energy flow. The two equalization processes can be performed simultaneously, and the currents in the different hierarchical circuits do not affect each other, thus achieving simultaneous equalizations within the series and between the series. An equalization condition of the terminal voltage is applied and simulations and experiments on charge, discharge, and static equalizations in the four series-connected ternary lithium-ion batteries are performed.
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spelling doaj.art-654db899c3ce49d8a15e530e7de96c2a2022-12-22T03:19:10ZengMDPI AGEnergies1996-10732019-05-011211207110.3390/en12112071en12112071Control Strategy for Active Hierarchical Equalization Circuits of Series Battery PacksXiaogang Wu0Zhihao Cui1Xuefeng Li2Jiuyu Du3Ye Liu4School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, ChinaSchool of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, ChinaSchool of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, ChinaState Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, ChinaSchool of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, ChinaMost series battery active equalization circuits implement the equalization first within the series and then between the series, which restricts the equilibrium speed. A hierarchical equalization circuit topology based on the Buck-Boost module is applied in this paper. The equalization is divided into two different equalization processes according to the equilibrium energy flow. The two equalization processes can be performed simultaneously, and the currents in the different hierarchical circuits do not affect each other, thus achieving simultaneous equalizations within the series and between the series. An equalization condition of the terminal voltage is applied and simulations and experiments on charge, discharge, and static equalizations in the four series-connected ternary lithium-ion batteries are performed.https://www.mdpi.com/1996-1073/12/11/2071series battery packsactive hierarchical equalizationcontrol strategy
spellingShingle Xiaogang Wu
Zhihao Cui
Xuefeng Li
Jiuyu Du
Ye Liu
Control Strategy for Active Hierarchical Equalization Circuits of Series Battery Packs
Energies
series battery packs
active hierarchical equalization
control strategy
title Control Strategy for Active Hierarchical Equalization Circuits of Series Battery Packs
title_full Control Strategy for Active Hierarchical Equalization Circuits of Series Battery Packs
title_fullStr Control Strategy for Active Hierarchical Equalization Circuits of Series Battery Packs
title_full_unstemmed Control Strategy for Active Hierarchical Equalization Circuits of Series Battery Packs
title_short Control Strategy for Active Hierarchical Equalization Circuits of Series Battery Packs
title_sort control strategy for active hierarchical equalization circuits of series battery packs
topic series battery packs
active hierarchical equalization
control strategy
url https://www.mdpi.com/1996-1073/12/11/2071
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