Cell equalization in battery stacks through State Of Charge estimation polling

Speltino, C.; Stefanopoulou, Anna G.; Fiengo, Giovanni

doi:10.1109/acc.2010.5530710

Cited by 75 publications

(39 citation statements)

References 16 publications

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“…Switched capacitor cell balancing, also known as "Charge Shuttling" equalization, [10][11][12][13][14][15][16][17][18] utilize basically an external energy storage devices, capacitor(s) for shuttling the energy between the battery pack cells so as to the balancing. The capacitor shuttling can be categorized into four shuttling configuration; the basic switched capacitor, double-tiered switched capacitor, single switched capacitor and modularized switched capacitor topologies.…”

Section: Capacitive Shuttling Balancing Methodsmentioning

confidence: 99%

“…The single switched capacitor balancing topology [1-2], [4][5], [17], [23] can consider as a derivation of the switched capacitor, but it uses only one capacitor as shown Fig. 4.…”

Section: Single Switched Capacitormentioning

confidence: 99%

“…The capacity of the total battery pack will also decrease more quickly during operation then fail the battery system [1]. Quite a lot of cell balancing/equalization methods have been proposed in [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] and reviewed in [1][2][3][4][5][6][7]. The balancing topologies can categories as passive and active balancing; The passive balancing methods as proposed in [8][9] removing the excess energy from the fully charged cell(s) through passive, resistor, element until the charge matches those of the lower cells in the pack or a charge reference.…”

Section: Introductionmentioning

confidence: 99%

“…The active cell balancing methods remove the charges from higher energy cell(s) and deliver it to lower energy cell(s). It has different topologies according to the active element used for storing the energy such as capacitor and/or inductive component as well as the energy converters as [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Not a lot of cell balancing researches illustrate the switched capacitor cell balancing topologies such [10][11][12][13][14][15][16][17][18] that is may be due to the switched capacitor methods has a long equalization time, but on the contrary, they have a simple control strategy and high efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Capacitor Based Battery Balancing System

Daowd

Omar

Bossche

et al. 2012

WEVJ

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Battery systems as a vital part of the electrical vehicles are facing major difficulties, the most important matter is the cells unbalancing. The cells unbalancing leads to individual cell voltages differ over time, decreasing the battery pack capacity that consequently will fail of the total battery system in the long run.In addition, cell equalization acts an important role on the battery life preserving. Several cell balancing topologies have been proposed for battery pack equalization such as; switched shunt resistors, inductor/transformer base, shuttling capacitor and energy converters. Quite a few researches focused the capacitor base cell balancing. This paper is presents a review, comparisons and develop the capacitor based topologies for balancing battery string. With the aid of MATLAB/Simulink ® modeling, the switched capacitor topologies have been proposed including circuits, cells balancing simulation, implementations, balancing speed, complexity and system efficiency, as well as, propose a new control strategy for the single switched capacitor.

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Section: Capacitive Shuttling Balancing Methodsmentioning

confidence: 99%

“…The single switched capacitor balancing topology [1-2], [4][5], [17], [23] can consider as a derivation of the switched capacitor, but it uses only one capacitor as shown Fig. 4.…”

Section: Single Switched Capacitormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Capacitor Based Battery Balancing System

Daowd

Omar

Bossche

et al. 2012

WEVJ

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show abstract

“…To achieve accurate equalization, SoC is taken as a criterion in many previous studies to describe charge inconsistency [20], [23]. Fig.…”

Section: A Soc Equalization Analysismentioning

confidence: 99%

Development of an Optimized Algorithm for Bidirectional Equalization in Lithium-Ion Batteries

Sun¹,

Zhu²,

Lu³

et al. 2015

Journal of Power Electronics

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Many equalization circuits have been proposed to improve pack performance and reduce imbalance. Although bidirectional equalization topologies are promising in these methods, pre-equalization global equalization strategy is lacking. This study proposes a novel state-of-charge (SoC) equalization algorithm for bidirectional equalizer based on particle swarm optimization (PSO), which is employed to find optimal equalization time and steps. The working principle of bidirectional equalization topologies is analyzed, and the reason behind the application of SoC as a balancing criterion is explained. To verify the performance of the proposed algorithm, a pack with 12 LiFePO4 batteries is applied in the experiment. Results show that the maximum SoC gap is within 2% after equalization, and the available pack capacity is enhanced by 13.2%. Furthermore, a comparison between previously used methods and the proposed PSO equalization algorithm is presented. Experimental tests are performed, and results show that the proposed PSO equalization algorithm requires fewer steps and is superior to traditional methods in terms of equalization time, energy loss, and balancing performance.

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Balancing/Balancing Control

2022

Battery Management System and Its Applications

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Cell equalization in battery stacks through State Of Charge estimation polling

Cited by 75 publications

References 16 publications

Capacitor Based Battery Balancing System

Capacitor Based Battery Balancing System

Development of an Optimized Algorithm for Bidirectional Equalization in Lithium-Ion Batteries

Balancing/Balancing Control

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