Title:
CELL BALANCING SYSTEM FOR EQUALIZING STATE OF CHARGE AMONG SERIES-CONNECTED ELECTRICAL ENERGY STORAGE UNITS
Document Type and Number:
WIPO Patent Application WO2004049540
Kind Code:
A3
Abstract:
A system and method of balancing state of charge among plural series connected storage unit is provided. Individual storage units (105) are selectively coupled by semiconductor switches (300) for monitoring and balancing state of charge. When the state or charge of a selected unit is different than a target state of charge, energy is transferred between the selected unit and the string of storage units, such that the state of charge of the selected unit converges toward the target state of charge. System and method is provided for determining state of charge and for balancing state of charge among plural series connected storage units. A power converter is provided for equalizing state of charge to a target state of charge in a non-dissipative manner.
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Inventors:
CHERTOK ALLAN (US)
FOWLER THOMAS J (US)
KING DARRELL J (US)
LAROCQUE GERALD R (US)
ONNERUD PER (US)
SHI JAY J (US)
FOWLER THOMAS J (US)
KING DARRELL J (US)
LAROCQUE GERALD R (US)
ONNERUD PER (US)
SHI JAY J (US)
Application Number:
PCT/US2003/037132
Publication Date:
November 18, 2004
Filing Date:
November 19, 2003
Export Citation:
Assignee:
TIAX LLC (US)
CHERTOK ALLAN (US)
FOWLER THOMAS J (US)
KING DARRELL J (US)
LAROCQUE GERALD R (US)
ONNERUD PER (US)
SHI JAY J (US)
CHERTOK ALLAN (US)
FOWLER THOMAS J (US)
KING DARRELL J (US)
LAROCQUE GERALD R (US)
ONNERUD PER (US)
SHI JAY J (US)
International Classes:
B60K6/20; B60L11/18; B60W10/26; H01M10/44; H02J7/00; (IPC1-7): H02J7/00
Foreign References:
| EP0432639A2 | 1991-06-19 |
Other References:
HOPKINS D C ET AL: "DYNAMIC EQUALIZATION DURING CHARGING OF SERIAL ENERGY STORAGE ELEMENTS", IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, IEEE INC. NEW YORK, US, vol. 29, no. 2, 1 March 1993 (1993-03-01), pages 363 - 367, XP000369396, ISSN: 0093-9994
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