A low-cost time shared cell balancing technique for future lithium-ion battery storage system featuring regenerative energy distribution

Imtiaz, Abusaleh M.; Khan, Faisal; Kamath, H. Ravishankar

doi:10.1109/apec.2011.5744686

Cited by 46 publications

(26 citation statements)

References 15 publications

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“…The charging current of the cell with the lowest energy and the cell voltage U j is calculated by Fig. 5 the Single Windings Transformer method or so called Switched Transformer [15], [16] consists of a transformer with primary windings L p and secondary windings L s for N cells. In the following unidirectional energy transfers are considered (from the battery module to a single cell).…”

Section: ) Single Inductormentioning

confidence: 99%

Comparison of Active Battery Balancing Systems

Caspar

Eiler

Hohmann

2014

2014 IEEE Vehicle Power and Propulsion Conference (VPPC)

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A quantitative model-based comparison of 10 active balancing circuits is presented for equalizing imbalanced cell energies of lithium-ion batteries. A mean current model approach is introduced for active balancing to describe energy transfers between battery cells for long charge/discharge operation. A Thévenin model for 96 battery cells is used as a subsystem of a mid-size electric vehicle. In quasi-static simulations, FTP75 driving cycles are continuously repeated until the first cell is discharged from initial full charge. Simulation results are compared for cases of new and aged cells with different capacity distributions concerning equalization speeds and final differences of cell energy.

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Section: ) Single Inductormentioning

confidence: 99%

Comparison of Active Battery Balancing Systems

Caspar

Eiler

Hohmann

2014

2014 IEEE Vehicle Power and Propulsion Conference (VPPC)

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“…The inductor or transformer balancing techniques are active methods, where the operation principle is to move energy from a cell to another cell [25][26][27][28]. Due to the relatively high balancing current, they offer a shorter balancing executing time [29].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Equalizing Method for Lithium-Ion Batteries Based on Coupled Inductor Balancing

Moghaddam

Bossche

2019

Electronics

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This article developed a coupled inductor balancing method to overcome cell voltage variation among cells in series, for Lithium Ion (Li-ion) batteries in Electrical Vehicles (EV). For an "eight cells in series" example, the developed balance circuit has four inductors, one magnetic circuit with one winding per two cells, and one control switch per cell, as compared to the traditional inductor-based equalizer that needs N-1 inductors and magnetic circuits for N number of cells and more switches. Therefore, ultimately, a more efficient, cost-effective circuit and low bill of materials (BOM) will be built up. All switches are logic-level N-Channel metal-oxide-semiconductor field-effect transistors (MOSFETs) and they are controlled by a pair of complementary signals in a synchronous trigger pattern. In the proposed topology, less components and fast equalization are achieved compared to the conventional battery management system (BMS) technique for electrical vehicles based on the inductor balancing method. This scheme is suitable for fast equalization due to the inductor-based balancing method. The inductors are made with a well-chosen winding ratio and all are coupled with one magnetic core with an air gap. Theoretical derivation of the proposed circuit was well-presented, and numerical simulation relevant to the electrochemical storage devices was conducted to show the validity of the proposed balance circuit. A complete balance circuit was built to verify that the proposed circuit could resolve imbalance problems which existed inside battery modules.

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“…Therefore, a cell voltage equalizer should be considered while designing an SC module. Numerous battery cell voltage equalizing technologies have been proposed in the literature, which are well summarized in [17][18][19][20][21][22][23][24][25][26]. The two main categories of voltage equalizing technology are passive equalization and active equalization.…”

Section: Introductionmentioning

confidence: 99%

Novel bifunctional converter‐based supercapacitor energy storage module with active voltage equalizing technology

Wei

Zhao

2016

IEEJ Transactions Elec Engng

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A bifunctional converter module for supercapacitor energy storage based on an input-series-output-series (ISOS) circuit is proposed in this paper. Compared to the existing topologies, the proposed circuit acts both as a supercapacitor cell voltage equalizer and as an output voltage regulator. During the charging process, series-connected flyback converters transfer energy from fully charged cells to the string via a bypass. Therefore, the fully charged cells maintain the rated terminal voltage, and the charging speed of the rest of the cells increases. During the discharging process, the output voltage of the module can be regulated with the same set of converters. The working principles during the discharging/charging processes are analyzed. The designs of the flyback converter and the control system are presented. A prototype consisting of three submodules is implemented. Experimental results verify the effectiveness of the proposed topology.

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A low-cost time shared cell balancing technique for future lithium-ion battery storage system featuring regenerative energy distribution

Cited by 46 publications

References 15 publications

Comparison of Active Battery Balancing Systems

Comparison of Active Battery Balancing Systems

An Efficient Equalizing Method for Lithium-Ion Batteries Based on Coupled Inductor Balancing

Novel bifunctional converter‐based supercapacitor energy storage module with active voltage equalizing technology

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