Electricity: battery or capacitor charging or discharging – Cell or battery charger structure – For battery pack
Reexamination Certificate
2007-11-20
2007-11-20
Vu, Bao Q. (Department: 2838)
Electricity: battery or capacitor charging or discharging
Cell or battery charger structure
For battery pack
C320S110000, C320S113000, C320S103000, C320S138000, C320S140000
Reexamination Certificate
active
10967559
ABSTRACT:
A detecting switch which is turned on/off in accordance with whether or not primary batteries have been attached to a primary battery holder is provided. In a normal state where no primary battery is attached, terminals (a, c) of a charge change-over switch are connected by a detection signal of the detecting switch, so that a voltage supplied from an external charger is inputted to a DC/DC converter. A secondary battery is charged by a predetermined value output of the DC/DC converter. When the primary batteries are attached, the detecting switch is turned on and terminals (b, c) of the charge change-over switch are connected, so that an output voltage of the primary batteries is inputted to the DC/DC converter. The secondary battery is charged by the predetermined value output of the DC/DC converter. Even when there is no charger, the secondary battery can be charged by the primary batteries and charging power sources are automatically switched.
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patent: 6392383 (2002-05-01), Takimoto et al.
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Maxim Integrated Products, DATASHEET for MAX1701, Jan. 1999, Maxim Integrated Products, Rev1.
Sonnenschein Nath & Rosenthal LLP
Sony Corporation
Vu Bao Q.
Zhang Jue
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