Switch Matrix Algorithm for Series Lithium Battery Pack Equilibrium Based on Derived Acceleration Information Gauss‐Seidel

Wei, Yewen; Dai, Shuailong; Wang, Jiayu; Shan, Zhifei; Min, Jie

doi:10.1155/2019/8075453

Cited by 7 publications

(6 citation statements)

References 19 publications

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“…It is recommended not to allow the battery to be fully charged because the high voltage causes the battery to be unbalanced. Selecting a lower voltage threshold or eliminating the saturation charge completely extends battery life [62,63].…”

Section: Comparison Of Different Types Of Batteriesmentioning

confidence: 99%

Degradation of Lithium-Ion Batteries in an Electric Transport Complex

et al. 2021

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The article provides an overview and comparative analysis of various types of batteries, including the most modern type—lithium-ion batteries. Currently, lithium-ion batteries (LIB) are widely used in electrical complexes and systems, including as a traction battery for electric vehicles. Increasing the service life of the storage devices used today is an important scientific and technical problem due to their rapid wear and tear and high cost. This article discusses the main approaches and methods for researching the LIB resource. First of all, a detailed analysis of the causes of degradation was carried out and the processes occurring in lithium-ion batteries during charging, discharging, resting and difficult operating conditions were established. Then, the main factors influencing the service life are determined: charging and discharging currents, self-discharge current, temperature, number of cycles, discharge depth, operating range of charge level, etc. when simulating a real motion process. The work considers the battery management systems (BMS) that take into account and compensate for the influence of the factors considered. In the conclusion, the positive and negative characteristics of the presented methods of scientific research of the residual life of LIB are given and recommendations are given for the choice of practical solutions to engineers and designers of batteries. The work also analyzed various operating cycles of electric transport, including heavy forced modes, extreme operating modes (when the amount of discharge and discharge of batteries is greater than the nominal value) and their effect on the degradation of lithium-ion batteries.

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Section: Comparison Of Different Types Of Batteriesmentioning

confidence: 99%

Degradation of Lithium-Ion Batteries in an Electric Transport Complex

et al. 2021

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“…Cell imbalance is a main significant factor in large battery packs which degrades the performance of the battery to be qualified by state of health (SOH) of battery 28‐30 . The weakest cell (lowest SOH of cell) in a set of series‐connected cells dominated the overall string strength which causes safety issues and thermal runaway when discharging the battery pack below the limit 31‐33 .…”

Section: Li‐ion Battery Cell Balancingmentioning

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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“…7 Further development in the control of the topology is implemented to simplify the process and reduce the power loss on the switches. [8][9][10] Besides, a systemic evaluation method is presented in Shan et al, 11 in which various topologies could be evaluated by their average efficiency under the same situation. Another practical balancing strategy is proposed to mitigate the problem of the inconsistent battery capacity of lithium batteries in new energy vehicles in reference.…”

Section: Introductionmentioning

confidence: 99%

“…To handle this issue, a novel interleaved converter in which each module could work synchronously with a constant duty rate 7 . Further development in the control of the topology is implemented to simplify the process and reduce the power loss on the switches 8‐10 . Besides, a systemic evaluation method is presented in Shan et al, 11 in which various topologies could be evaluated by their average efficiency under the same situation.…”

Section: Introductionmentioning

confidence: 99%

The control and evaluation method of the cascaded buck–boost converter for equalization on battery strings

Chen

Wang

Huang

et al. 2022

Circuit Theory & Apps

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With the further implementation of the carbon peak carbon neutral strategy, new energy vehicles will play an important cornerstone in the realization of this policy. However, the power source lithium battery pack has reduced the charge and discharge capacity due to the variation in the energy of the single cells, which largely limits the wide application of new energy vehicles. A cascaded buck–boost converter is proposed to balance the inconsistent energy in the battery pack. This equalization circuit is equipped with two fundamental working modes on which a matrix equalization strategy is developed and optimized accordingly. Then, the systematic evaluation method on average efficiency and time is applied to investigate the performance of the converter. Subsequently, the proposed converter and its control method have shown better performance than the existing equalization circuit via simulation and experimental verification. The design has high scalability and is expected to be applied to large‐scale energy storage systems to serve the construction of the global energy Internet.

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Switch Matrix Algorithm for Series Lithium Battery Pack Equilibrium Based on Derived Acceleration Information Gauss‐Seidel

Cited by 7 publications

References 19 publications

Degradation of Lithium-Ion Batteries in an Electric Transport Complex

Degradation of Lithium-Ion Batteries in an Electric Transport Complex

Overview of cell balancing methods for Li‐ion battery technology

The control and evaluation method of the cascaded buck–boost converter for equalization on battery strings

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