Active Cell Balancing of Li-Ion Batteries for Electric Vehicles

Banerjee, Debadyuti; Giri, Anirban; Saha, Shib Sankar

doi:10.2139/ssrn.3495810

Cited by 4 publications

(3 citation statements)

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“…This balancing circuit balances the cells in a shorter time and high efficiency than the passive balancing technique. But this circuit is a very complex system which increases the system cost high 43,44 …”

Section: Active Cell Balancing Techniquementioning

confidence: 99%

Overview of cell balancing methods for Li‐ion battery technology

Hemavathi

2020

Energy Storage

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Li‐ion batteries are influenced by numerous features such as over‐voltage, undervoltage, overcharge and discharge current, thermal runaway, and cell voltage imbalance. One of the most significant factors is cell imbalance which varies each cell voltage in the battery pack overtime and hence decreases battery capacity rapidly. To increase the lifetime of the battery pack, the battery cells should be frequently equalized to keeps up the difference between the cells as small as possible. There are different techniques of cell balancing have been presented for the battery pack. It is classified as passive and active cell balancing methods based on cell voltage and state of charge (SOC). The passive cell balancing technique equalizing the SOC of the cells by the dissipation of energy from higher SOC cells and formulates all the cells with similar SOC equivalent to the lowest level cell SOC. The active cell balancing transferring the energy from higher SOC cell to lower SOC cell, hence the SOC of the cells will be equal. This review article introduces an overview of different proposed cell balancing methods for Li‐ion battery can be used in energy storage and automobile applications.

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Section: Active Cell Balancing Techniquementioning

confidence: 99%

Overview of cell balancing methods for Li‐ion battery technology

Hemavathi

2020

Energy Storage

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“…Moreover, if there are cells whose charging capacity is lowered due to the presence of aging cells, there is also the disadvantage that the charging capacity of the entire ESS may be reduced [17,18]. The active balancing method performs cell balancing by moving charges from a battery cell with a high voltage capacity to a battery cell with a low voltage capacity and can solve the problem of the voltage capacity of the ESS compared with the passive balancing method [19,20].…”

Section: Introductionmentioning

confidence: 99%

“…The proposed topology uses a multiwinding transformer to insulate the single input and multiple output (SIMO) terminals of the two -switch converter [24]. The topology is configured as a magnetic flux sharing type The active balancing method performs cell balancing by moving charges from a battery cell with a high voltage capacity to a battery cell with a low voltage capacity and can solve the problem of the voltage capacity of the ESS compared with the passive balancing method [19,20].…”

Section: Introductionmentioning

confidence: 99%

New Cell Balancing Technique Using SIMO Two-Switch Flyback Converter with Multi Cells

Kim

Park

2022

Energies

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Recently, as the perception of eco-friendliness has changed, the demand for energy storage devices has been rapidly increasing due to the growth of the electric vehicle industry and smart grid facilities, which are emerging as an alternative to next-generation electricity supply and demand. Therefore, the importance of battery management technology is growing, and various voltage balancing techniques between battery cells are being studied in order to maintain high efficiency and continuous performance of batteries. This paper proposes a voltage balancing topology using a single input-multiple output (SIMO) two-switch flyback converter in a series battery configuration to resolve voltage imbalance between batteries. The characteristic of the proposed topology is that each cell on the secondary side of the two-switch flyback converter is connected to one high-frequency transformer to share the magnetic flux, and voltage balancing is performed according to the switch operation of the converter. At this time, the accumulated excess energy of the converter is refluxed to the power supply side through the freewheeling diode and converted into reactive power. The verification of the usefulness of the theoretical analysis in this paper was based on the analysis of the dynamic characteristics and steady state of the circuit through PSIM and experiments, and was conducted for one module composed of four cells.

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