Advancement of lithium-ion battery cells voltage equalization techniques: A review

Das, Utpal Kumar and Shrivastava, Prashant and Tey, Kok Soon and Idris, Mohd Yamani Idna and Mekhilef, Saad and Jamei, Elmira and Seyedmahmoudian, Mehdi and Stojcevski, Alex (2020) Advancement of lithium-ion battery cells voltage equalization techniques: A review. Renewable and Sustainable Energy Reviews, 134. ISSN 1364-0321, DOI https://doi.org/10.1016/j.rser.2020.110227.

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Abstract

Recently, the use of electric batteries has reached great heights due to the invention of electric vehicles (EVs). Many lithium-ion battery cells are usually connected in series to meet the voltage requirements. The voltages of the entire series-connected battery cells in a battery pack should be equal. However, such result is impossible due to some unavoidable reasons in real life. Unbalanced battery cell voltages can reduce storage capacities and may cause explosions or fires in the worst case which is a major obstacle for safe and optimum operations of battery-driven appliances, such as EVs. Therefore, battery cell voltage equalizations have become an important research topic. Many studies have been conducted to develop and improve techniques to equalize battery cell voltages by incorporating various remarkable features. This study makes a comprehensive and systematic review of these cell equalization techniques. The importance and research prospect of battery cell voltage equalizers are discussed. A critical analysis of recent techniques, particularly on construction, operation, and control strategy of equalization circuits, is also presented. Moreover, recent studies are compared based on circuit designs, sizes, costs, complexities, system efficiencies, applications, control strategies, balancing speeds, and voltage/current stresses of different equalizers. Commonly used two different types of control strategies/algorithms in software system of battery cell equalizers are briefly described. The recent research trend of different equalizers is also discussed in detail. Simulation results of few equalization approaches and performance evaluation techniques are analyzed.

Item Type: Article
Funders: Fundamental Research Grant Scheme (FRGS/1/2018/TK07/UM/02/4), Fundamental Research Grant Scheme (FP0952018A), NICOP research (N62909-18-1-2030), NICOP research (IF011-2018)
Uncontrolled Keywords: Lithium-ion battery; Cell; Voltage equalization circuits; Control strategy; Electric vehicle (EV); Battery management system (BMS)
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Computer Science & Information Technology
Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms Zaharah Ramly
Date Deposited: 31 May 2023 02:39
Last Modified: 31 May 2023 02:39
URI: http://eprints.um.edu.my/id/eprint/37100

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