Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells
Reexamination Certificate
2007-05-25
2010-11-02
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
C320S118000, C320S124000, C324S426000, C429S320000
Reexamination Certificate
active
07825628
ABSTRACT:
The present invention is a method for balancing voltages of a serially connected plurality of cells in a battery pack provided with the plurality of cells. In this method, the voltages are balanced by: connecting a pair of a resistor and a switch, which are serially connected with each other, in a parallel relationship to one of the plurality of cells; switching the switch from an open state to a closed state when a voltage of the one cell increases to a prescribed balance operation starting voltage; and maintaining a state where the cell is charged by a voltage of the same magnitude as a voltage that is applied to both ends of the pair after switching of the switch to the closed state.
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patent: 7609030 (2009-10-01), Uesugi et al.
patent: 2002/0190692 (2002-12-01), Marten
patent: 2003/0044689 (2003-03-01), Miyazaki et al.
patent: 2004/0036446 (2004-02-01), Iwashima
patent: 2004/0178768 (2004-09-01), Miyazaki et al.
patent: 2005/0212481 (2005-09-01), Nakada
patent: 2005/0242775 (2005-11-01), Miyazaki et al.
patent: 2001-268817 (2001-09-01), None
Fantu Yalkew
GS Yuasa Corporation
Tso Edward
Westerman Hattori Daniels & Adrian LLP
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