Increased performance of battery packs by active equalization

Jonathan W. Kimball; Brian T. Kuhn; Philip T. Krein

doi:10.1109/VPPC.2007.4544145

Increased performance of battery packs by active equalization

Jonathan W. Kimball, Brian T. Kuhn, Philip T. Krein

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

Original language	English (US)
Title of host publication	VPPC 2007 - Proceedings of the 2007 IEEE Vehicle Power and Propulsion Conference
Pages	323-327
Number of pages	5
DOIs	https://doi.org/10.1109/VPPC.2007.4544145
State	Published - 2007
Event	VPPC 2007 - 2007 IEEE Vehicle Power and Propulsion Conference - Arlington, TX, United States Duration: Sep 9 2007 → Sep 12 2007

Publication series

Name	VPPC 2007 - Proceedings of the 2007 IEEE Vehicle Power and Propulsion Conference

Other

Other	VPPC 2007 - 2007 IEEE Vehicle Power and Propulsion Conference
Country/Territory	United States
City	Arlington, TX
Period	9/9/07 → 9/12/07

Keywords

Battery equalization
Battery pack
Electric vehicle

ASJC Scopus subject areas

Automotive Engineering
Control and Systems Engineering

Online availability

10.1109/VPPC.2007.4544145

Library availability

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Increased performance of battery packs by active equalization. / Kimball, Jonathan W.; Kuhn, Brian T.; Krein, Philip T.
VPPC 2007 - Proceedings of the 2007 IEEE Vehicle Power and Propulsion Conference. 2007. p. 323-327 4544145 (VPPC 2007 - Proceedings of the 2007 IEEE Vehicle Power and Propulsion Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kimball, JW, Kuhn, BT & Krein, PT 2007, Increased performance of battery packs by active equalization. in VPPC 2007 - Proceedings of the 2007 IEEE Vehicle Power and Propulsion Conference., 4544145, VPPC 2007 - Proceedings of the 2007 IEEE Vehicle Power and Propulsion Conference, pp. 323-327, VPPC 2007 - 2007 IEEE Vehicle Power and Propulsion Conference, Arlington, TX, United States, 9/9/07. https://doi.org/10.1109/VPPC.2007.4544145

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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.",

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AB - 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.

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KW - Electric vehicle

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Increased performance of battery packs by active equalization

Abstract

Publication series

Other

Keywords

ASJC Scopus subject areas

Online availability

Library availability

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