Integrated balancing method for series‐parallel battery packs based on LC energy storage

Guo, Xiangwei; Liu, Zhen; Xu, Xiaozhuo; Geng, Jie; Kang, Longyun

doi:10.1049/elp2.12047

Cited by 8 publications

(4 citation statements)

References 33 publications

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“…Current battery equalization technology is based on two main equalization concepts: active equalization and passive equalization 6 . Passive equalization is subject to problems such as low equalization efficiency and significant thermal effects; thus, current research has been focused mainly on active equalization.…”

Section: Introductionmentioning

confidence: 99%

“…Current battery equalization technology is based on two main equalization concepts: active equalization and passive equalization. 6 Passive equalization is subject to problems such as low equalization efficiency and significant thermal effects; thus, current research has been focused mainly on active equalization. According to how equalization is achieved, active equalization can be further subdivided into five different types: adjacent cell to cell (AD2C), direct cell to cell (DC2C), cell to pack (C2P), pack to cell (P2C), and hybrid equalization.…”

mentioning

confidence: 99%

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Hybrid equalization scheme for a lithium‐ion battery pack based on a three‐winding transformer

Li,

Wang,

Zou

et al. 2024

Circuit Theory & Apps

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SummaryIn order to solve the problem of inconsistency between cells in lithium‐ion battery packs, a hybrid equalization topology based on a three‐winding transformer and a group adaptive interleaved control strategy are proposed. The scheme not only has two equalization types, pack to cell (P2C) and cell to pack (C2P), but also adaptively adjusts the equalization type according to the state of the battery pack, so that the equalization circuit always works in the best state and realizes the fast equalization of the battery pack. Through the analysis of speed, efficiency, and cost, it is concluded that the scheme has the characteristics of fast balancing speed, high balancing efficiency, and low cost. Then the experimental analysis was carried out under three working conditions of charging, shelving, and discharging to verify the feasibility of the novel scheme in practical applications.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Hybrid equalization scheme for a lithium‐ion battery pack based on a three‐winding transformer

Li,

Wang,

Zou

et al. 2024

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…Passive balancing usually connects a resistor in parallel with a cell to dissipate excess energy in the cell. The advantages of this balancing method include simple circuit structure, low circuit cost, and lack of requirement of complex control strategies, but the thermal management problem caused by energy consumption is the main drawback of this method [14,15]. Active balancing uses active circuits to transfer energy from a high-energy cell to a low-energy cell.…”

Section: Introductionmentioning

confidence: 99%

Multi-Mode Lithium-Ion Battery Balancing Circuit Based on Forward Converter with Resonant Reset

Zong,

Li,

Wang

et al. 2023

Applied Sciences

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A multi-mode active balancing circuit based on a forward converter with resonant reset is proposed to deal with unbalanced states of lithium-ion battery packs. The balancing circuit utilizes the forward converter, enabling high-power balancing. SPST relays are selected to constitute the switching matrix, and the proposed balancing circuit completes the connection of serial battery clusters to the main circuit by controlling the SPST relays, realizing the Multi-Cell-to-Multi-Cell (MC2MC) balancing method. An “adaptive selection mode based on the state of high energy battery” balancing strategy is proposed. The proposed balancing strategy allows the proposed balancing circuit to have multiple balancing modes, flexible balancing paths, and switching between different balancing processes in real time, significantly improving the balancing speed. The inherent LC resonant reset structure of the forward converter is employed to achieve MOSFET zero-voltage switching (ZVS). To optimize the balancing performance, the circuit model is built and the balancing parameters in the circuit are analyzed. An experiment with an eight-cell lithium-ion battery pack was performed to verify the balancing effect of the proposed circuit, and comparison with a typical balancing circuit was carried out. Experimental results show that the proposed balancing circuit has a faster balancing speed.

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“…Existing research on balancing methods include balancing topologies and control strategies. In terms of the balancing topologies, they can be divided into passive topologies and active topologies [7]. Passive balancing utilizes additional resistors to consume unwanted energy.…”

Section: Introductionmentioning

confidence: 99%

A Flyback Converter-Based Hybrid Balancing Method for Series-Connected Battery Pack in Electric Vehicles

Guo

Geng

Liu

et al. 2021

IEEE Trans. Veh. Technol.

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An active balancing method based on two flyback converters is proposed for series-connected battery pack. Balanced energy can be transferred between the whole battery and any single cell. The proposed topology reduces the number of energy storage components, the volume and the cost of the balancing system. And it has the characteristics of fast balancing speed and high balancing efficiency. Based on the topology, a dual-objective hybrid control strategy is proposed, which can reduce the highest voltage and boost the lowest voltage in the charging or discharging process of the cells in one sampling period, so as to improve the balancing speed. Simulation and experimental results show that the proposed method has a good balancing effect and can significantly improve the consistency of series battery pack. This work is potentially significant in terms of improved reliability of battery packs and savings of costs and lives in safety-critical applications.

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Integrated balancing method for series‐parallel battery packs based on LC energy storage

Cited by 8 publications

References 33 publications

Hybrid equalization scheme for a lithium‐ion battery pack based on a three‐winding transformer

Hybrid equalization scheme for a lithium‐ion battery pack based on a three‐winding transformer

Multi-Mode Lithium-Ion Battery Balancing Circuit Based on Forward Converter with Resonant Reset

A Flyback Converter-Based Hybrid Balancing Method for Series-Connected Battery Pack in Electric Vehicles

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