Active balancing method for series battery pack based on flyback converter

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

doi:10.1049/iet-cds.2020.0008

Cited by 6 publications

(10 citation statements)

References 25 publications

(28 reference statements)

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“…Te magnetisation inductance of the transformer is used as a storage element; for N number of cells, 2N + 4 number of switches, two capacitors and one transformer are used in this topology for BCE. Tis topology is depicted in the circuit shown in Figure 12 [65,66]. Te fyback converter can operate in unidirectional as well as bidirectional modes.…”

Section: Flyback Convertermentioning

confidence: 99%

A Comprehensive Review of Various Topologies and Control Techniques for DC-DC Converter-Based Lithium-Ion Battery Charge Equalization

Sugumaran

Prabha

2023

International Transactions on Electrical Energy Systems

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Worldwide, electric vehicle (EV) sales are booming nowadays due to the rapid increase in the cost of fossil fuels. Lithium-ion batteries are very familiar in the EV industry because of their high energy per unit mass relative to other electric energy storage systems. To obtain the required voltage, several lithium-ion batteries are connected serially. Due to manufacturing inconsistencies, the voltage of serially connected cells is not always equal, which might result in a charge imbalance. This imbalance may reduce the battery’s life span due to the action of undercharging and overcharging. Battery charge equalisation (BCE) is challenging because it requires a constant voltage level in each cell. Various topologies and control strategies have been proposed in the past literature to build and improve the BCE. This study extracts the recently proposed DC-DC converter-based topologies for BCE. This study then gives a comparative analysis of various control strategies used in BCE and ends with implementing control strategies with BCE topology using a DC-DC converter. This study incorporates contextualised topologies used by BCE with design, operation, and applications. Extensive simulation results are provided to compare the performance of DC-DC converter-based BCE topologies in balancing speed. Also, a comprehensive comparison of various converter topologies and control strategies has been carried out for future investigation.

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Section: Flyback Convertermentioning

confidence: 99%

A Comprehensive Review of Various Topologies and Control Techniques for DC-DC Converter-Based Lithium-Ion Battery Charge Equalization

Sugumaran

Prabha

2023

International Transactions on Electrical Energy Systems

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“…To further verify the superiority of the novel topology balancing speed, the topology is compared with the topology based on multi-inductor and transformer [14,21], and the simulation models are built in MATLAB/Simulink for verification. The topologies in [14,21] are only for series-connected battery pack, and the topology is also suitable for series-parallel -589 battery pack. To be unified with [14,21], the topology of this study is applied to the series battery pack to compare the balancing speed without affecting its fast balancing speed.…”

Section: Comparative Analysis Of Balancing Speedmentioning

confidence: 99%

“…The topologies in [14,21] are only for series-connected battery pack, and the topology is also suitable for series-parallel -589 battery pack. To be unified with [14,21], the topology of this study is applied to the series battery pack to compare the balancing speed without affecting its fast balancing speed. All simulation parameters of the three topologies are consistent, as shown in Table 3.…”

Section: Comparative Analysis Of Balancing Speedmentioning

confidence: 99%

“…However, there are many switching devices and complicated control. The transformer-based balancing topologies proposed in [19][20][21][22][23][24][25] have the advantages of high balancing efficiency, simple control and easy isolation. However, the transformer design is more complicated, and there are magnetic saturation problems, resulting in large volume, difficulty modularising, and relatively high cost and difficulty to expand.…”

Section: Introductionmentioning

confidence: 99%

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

Guo

Liu

et al. 2021

IET Electric Power Appl

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Inconsistencies are inevitable in the practical application of battery packs of new energy vehicles, which will reduce the energy utilisation rate and service life and even endanger the safety of the battery system. To reduce the inconsistency of battery packs, this study innovatively proposes an integrated active balancing method for series-parallel battery packs based on LC energy storage. Only one inductor and one capacitor are used to store energy to achieve the balance of each cell in a series-parallel battery pack. This design has the characteristics of simple structure, small volume, fast balancing speed and easy expansion. By building an experimental platform, the effectiveness of this novel integrated balancing method is verified. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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“…However, the balancing speed of this method is very slow when there is only one cell with low power in the pack. In contrast to C2P, Pack-to-Cell (P2C), as shown in [31,32], refers to the transfer of energy from the whole battery pack to a cell. This approach enhances balancing speed when there are fewer cells with low power.…”

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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Active balancing method for series battery pack based on flyback converter

Cited by 6 publications

References 25 publications

A Comprehensive Review of Various Topologies and Control Techniques for DC-DC Converter-Based Lithium-Ion Battery Charge Equalization

A Comprehensive Review of Various Topologies and Control Techniques for DC-DC Converter-Based Lithium-Ion Battery Charge Equalization

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

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

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