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

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Ricardo de Castro (Author) Other; Cláudio Pinto (Author) Other; Jorge Varela Barreras (Author) Other; Rui Esteves Araújo (Author) FEUP; David A. Howey (Author) Other

Journal

Title: IEEE Transactions on Vehicular Technology

Vol. 68 No. 12

Pages: 11449- 11461

ISSN: 0018-9545

Publisher: IEEE

Indexing

ISI Web of Knowledge - 8 Citations

ISI Web of Science

Scopus - 9 Citations

INSPEC

Other information

Authenticus ID: P-00R-J44

DOI: 10.1109/tvt.2019.2929653

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