Title:
【発明の名称】直列接続されたエネルギー蓄積装置のための等化システムおよび方法
Document Type and Number:
Japanese Patent JP2001511638
Kind Code:
A
Abstract:
An apparatus and method for regulating the charge voltage of a number of electrochemical cells connected in series is disclosed. Equalization circuitry is provided to control the amount of charge current supplied to individual electrochemical cells included within the series string of electrochemical cells without interrupting the flow of charge current through the series string. The equalization circuitry balances the potential of each of the electrochemical cells to within a pre-determined voltage setpoint tolerance during charging, and, if necessary, prior to initiating charging. Equalization of cell potentials may be effected toward the end of a charge cycle or throughout the charge cycle. Overcharge protection is also provided for each of the electrochemical cells coupled to the series connection. During a discharge mode of operation in accordance with one embodiment, the equalization circuitry is substantially non-conductive with respect to the flow of discharge current from the series string of electrochemical cells. In accordance with another embodiment, equalization of the series string of cells is effected during a discharge cycle.
Inventors:
Loirard, Jean
Comte, Christoph
Hagen, Ronald A.
Nudson, Orlean Bee.
Morin, Andre
Ross, Guy
Comte, Christoph
Hagen, Ronald A.
Nudson, Orlean Bee.
Morin, Andre
Ross, Guy
Application Number:
JP2000504642A
Publication Date:
August 14, 2001
Filing Date:
July 23, 1998
Export Citation:
Assignee:
Minnesota Mining and Manufacturing Company
Hydro-Quebec Corporation
Hydro-Quebec Corporation
International Classes:
H02J7/02; H02J7/00; H02J7/34; (IPC1-7): H02J7/02; H02J7/00; H02J7/34
Attorney, Agent or Firm:
Takashi Ishida (4 others)