Electricity: battery or capacitor charging or discharging – Battery or cell charging – With detection of current or voltage integral
Reexamination Certificate
2008-07-01
2008-07-01
Vu, Bao Q. (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
With detection of current or voltage integral
C320S153000
Reexamination Certificate
active
07394224
ABSTRACT:
A charge control device of a secondary battery that allows the use of an electronic apparatus for a long period using a single initial charging, and is capable of extending battery life. The charging device includes a charge circuit for supplying charging current to secondary batteries, a voltage detection circuit for detecting the voltage of secondary batteries, a current detection circuit for detecting the charging current in secondary batteries, a memory such as an EEPROM for recording the number of times of charging or total charge integrated amount in secondary batteries, and a microcontroller for controlling charge circuit, changing over to constant voltage charge after charging secondary batteries2at constant current, and decreasing the voltage in constant voltage charging depending on the number of times of charge or total charge integrated amount recorded in the memory of EEPROM.
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Takagi Toshiyuki
Wanibuchi Toru
Matsushita Electric - Industrial Co., Ltd.
Muralidar Richard V
Vu Bao Q.
Wenderoth , Lind & Ponack, L.L.P.
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