Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Reexamination Certificate
2011-04-12
2011-04-12
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
With charging
C320S149000, C320S154000, C324S429000, C324S434000, C324S522000, C340S636120, C340S636150, C340S636170, C340S636200, C307S049000, C307S054000
Reexamination Certificate
active
07923969
ABSTRACT:
A state-of-charge equalizing device equalizes the state of charge of each of cells connected in series to form an assembled battery, and comprises charging/discharging circuits connected in parallel to the respective cells to discharge and/or charge the respective cells, voltage measurement circuits connected to the respective charging/discharging circuits to measure the voltages across the respective cells, and a control circuit. The control circuit comprises a unit calculating an equalization target voltage based on the measured voltages before the charge or discharge starts, a unit starting discharging/charging the cells having a voltage thereacross different from the target voltage, a unit correcting the target voltage to thereby calculate a corrected equalization target voltage for each of those cells based on the difference between the measured voltages before and at a certain time period after the charging/discharging, and a unit ending the discharging/charging when the measured voltage reaches the corrected target voltage.
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European Search Report issued on Jan. 4, 2011 in the corresponding to European Patent Application No. 08254080.6.
Kirimoto Mika
Murao Hiroya
Fantu Yalkew
NDQ&M Watchstone LLP
Sanyo Electric Co,. Ltd.
Tso Edward
LandOfFree
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