Active cell balancing circuit for series-connected battery cells

Jeon, Seonwoo; Yun, Jae-Jung; Bae, Sungwoo

doi:10.1109/icpe.2015.7167930

Cited by 24 publications

(5 citation statements)

References 14 publications

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“…The variation in the capacity of battery cells connected in series, causes the voltage of some cells to rise into dangerous levels, which results in a faster degradation of the cells. Active balancing of battery cells 40 is not only important for improving the performance of the battery; it also extends battery life and enhances safety.…”

Section: Improving Reliability By Increasingthe Level Of Balancing Cl...mentioning

confidence: 99%

Improving reliability by increasing the level of balancing and by substitution

Todinov

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Problems with the current methods for reliability improvement are discussed as well as two generic methods for reliability improvement. The paper argues that reliability improvement is underpinned by common principles that provide key input to the design process. The domain-independent methods change the way engineers and scientists approach reliability improvement. The presented generic methods encourage simple low-cost solutions as opposed to some traditional high-cost solutions based on introducing redundancy, condition monitoring, reinforcement and use of expensive materials. The domain-independent methods allow engineers and scientists in a particular domain to access excellent solutions and practices for eliminating failure modes in other domains. In this way, the constant ‘reinventing of the wheel’ is avoided. As part of the presented approach, a generic method for increasing reliability by increasing the level of balancing and by substitution have been presented. In addition, a new classification of techniques related to increasing the level of balancing has been introduced and discussed for the first time. The paper also proves rigorously that if two components must be selected from n batches containing reliable and faulty components with unknown proportions, the likelihood that both components will be reliable is maximised by selecting the components from a randomly selected batch.

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Section: Improving Reliability By Increasingthe Level Of Balancing Cl...mentioning

confidence: 99%

Improving reliability by increasing the level of balancing and by substitution

Todinov

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The impedance degrades as a function of cycle number when battery ages [69], [82]. In a battery pack, the individual cell impedance characteristics vary by cell compounds, differences in initial charge capacity, power losses, and differences in cell voltage due to external temperature effects [83]. Impedance can be approximated by an aggregated internal resistance, which is estimated as the ratio of the observed voltage drop and the applied load current.…”

Section: When Cells Have Different Coulombic Efficiencymentioning

confidence: 99%

Review of Battery Cell Balancing Methodologies for Optimizing Battery Pack Performance in Electric Vehicles

Omariba

Zhang

Sun³

2019

IEEE Access

200

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Batteries are gaining entry into every home and office for they are widely used because of their variant benefits. However, these batteries are prone to failure caused by charge imbalance in the batteries connected in either series or parallel, which can sometimes be catastrophic and hence they require to be properly monitored in a real-time manner. There exist many battery balancing schemes which are broadly grouped into either passive or active schemes. All these schemes have their own advantages and disadvantages, and hence it is upon the user to decide on which scheme will best work for them. However, research has proven that the hybrid scheme will be the best as it couples the benefits of all schemes. This study will review the various battery cell balancing methodologies and evaluate their relationship with battery performance. At present there are a few studies tackling the mechanical vibration of battery balancing performance. This study shows that battery balancing performance during long-term should be evaluated from various temperature and vibration frequencies.INDEX TERMS Battery cell balancing, electric vehicles, hybrid schemes, and performance optimization.

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“…A BMS with high current balancing was presented in [18]. An active cell balancing circuit based on a forward DC-DC converter for series-connected battery cells was proposed in [19]. A single non-isolated DC/DC converter and controlled switches-based active balancing topology was proposed in [20].…”

Section: Introductionmentioning

confidence: 99%

A Low-Cost and High-Efficiency Active Cell-Balancing Circuit for the Reuse of EV Batteries

Dinh,

Le,

Park

2024

Batteries

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In this paper, a high-efficiency and low-cost active cell-to-cell balancing circuit for the reuse of electric vehicle (EV) batteries is proposed. In the proposed method, a battery string is divided into two legs to transfer the charge from each cell in one leg to that in the other and a bidirectional CLLC resonant converter is used to transfer energy between the selected cells. Thanks to the proposed structure, the number of bidirectional switches and gate drivers can be reduced by half compared to the conventional direct cell-to-cell topologies, thereby achieving lower cost for the system. The CLLC converter is used to transfer the charge, and it is designed to work at resonant frequencies to achieve zero-voltage zero-current switching (ZVZCS) for all the switches and diodes. Consequently, the system’s efficiency can be enhanced, and hence, the fuel economy of the system can also be improved significantly. To verify the performance of the proposed active cell-balancing system, a prototype is implemented for balancing the three EV battery modules that contain twelve lithium-ion batteries from xEV. The maximum efficiency achieved for the charge transfer is 89.4%, and the balancing efficiency is 96.3%.

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Active cell balancing circuit for series-connected battery cells

Cited by 24 publications

References 14 publications

Improving reliability by increasing the level of balancing and by substitution

Improving reliability by increasing the level of balancing and by substitution

Review of Battery Cell Balancing Methodologies for Optimizing Battery Pack Performance in Electric Vehicles

A Low-Cost and High-Efficiency Active Cell-Balancing Circuit for the Reuse of EV Batteries

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