Abstract
Battery packs for most applications are series strings of electrochemical cells. Due to manufacturing variations, temperature differences, and aging, the individual cells perform differently. When a complete pack is charged and discharged as a single two-terminal circuit element, some cells are chronically overcharged, undercharged, or overdischarged, all of which act to reduce cell life. The performance and life of the complete pack is limited by the weakest cell. Many methods have been proposed and explored to mitigate this problem. In the present work, a switched-capacitor converter is shown to be a simple and effective method to maintain equal cell or monoblock charge conditions. Design criteria are discussed.
Recommended Citation
J. W. Kimball et al., "Increased Performance of Battery Packs by Active Equalization," Proceedings of the IEEE Vehicle Power and Propulsion Conference (2007, Arlington, TX), pp. 323 - 327, Institute of Electrical and Electronics Engineers (IEEE), Sep 2007.
The definitive version is available at https://doi.org/10.1109/VPPC.2007.4544145
Meeting Name
IEEE Vehicle Power and Propulsion Conference (2007: Sep. 9-12, Arlington, TX)
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
Battery Equalization; Battery Pack; Electric Vehicle; Propulsion; Cells; Batteries; Voltage; Manufacturing; Temperature; Aging; Electric Vehicles; Impedance; Clamps; Chemistry; Circuits; Switching Convertors; Electrochemistry; Secondary Cells
International Standard Book Number (ISBN)
978-0780397606
International Standard Serial Number (ISSN)
1938-8756
Document Type
Article - Conference proceedings
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2007 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
Publication Date
01 Sep 2007
