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Smart and Hybrid Balancing System: Design, Modeling, and Experimental Demonstration

Title
Smart and Hybrid Balancing System: Design, Modeling, and Experimental Demonstration
Type
Article in International Scientific Journal
Year
2019
Authors
Ricardo de Castro
(Author)
Other
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Cláudio Pinto
(Author)
Other
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Jorge Varela Barreras
(Author)
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Rui Esteves Araújo
(Author)
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David A. Howey
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Journal
Vol. 68 No. 12
Pages: 11449- 11461
ISSN: 0018-9545
Publisher: IEEE
Indexing
Publicação em ISI Web of Science ISI Web of Science
INSPEC
Other information
Authenticus ID: P-00R-J44
Resumo (PT):
Abstract (EN): Performance of series connected batteries is limited by the 'weakest link' effect, i.e., the cell or group of cells with the poorest performance in terms of temperature, power, or energy characteristics. To mitigate the 'weakest link' effect, this study deals with the design, modeling, and experimental demonstration of a smart and hybrid balancing system (SHBS). A cell-to-cell shared energy transfer configuration is proposed, including a supercapacitor bank in the balancing bus, thus enabling hybridization. Energy is transferred from each battery module connected in series to the balancing bus, and vice-versa, by means of low-cost bi-directional dc-dc converters. The current setpoints of the converters are obtained by means of a smart balancing control strategy, implemented using convex optimization. The strategy is called 'smart' because it pursues goals beyond the conventional state-of-charge equalization, including temperature and power capability equalization, and minimization of energy losses. Simulations show that the proposed SHBS is able to achieve all these goals effectively in an e-mobility application and are also used to assess the impact of different hybridization ratios and cooling conditions. Finally, an experimental setup is developed to demonstrate the feasibility of the SHBS. © 1967-2012 IEEE.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 13
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