Control Strategy for Active Hierarchical Equalization Circuits of Series Battery Packs

Xiaogang Wu, Zhihao Cui, Xuefeng Li, Jiuyu Du and Ye Liu
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Xiaogang Wu: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China
Zhihao Cui: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China
Xuefeng Li: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China
Jiuyu Du: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Ye Liu: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China

Energies, 2019, vol. 12, issue 11, 1-18

Abstract: 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.

Keywords: series battery packs; active hierarchical equalization; control strategy (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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