Electricity: battery or capacitor charging or discharging – Diverse charging or discharging rates for plural batteries
Reexamination Certificate
2005-10-28
2010-06-08
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
Diverse charging or discharging rates for plural batteries
C320S114000, C320S134000, C324S427000
Reexamination Certificate
active
07733060
ABSTRACT:
The present invention relates to charging of rechargeable batteries built into electronic devices and is configured to constrain heat generation during the charging. A charging IC used for charging a rechargeable battery built into an electronic device is disclosed that comprises a power source unit which can be fed with power from an external power source with a drooping characteristic to pick up a constant current; and a control unit which applies a first constant current from the external power source to the rechargeable battery through a circuit element installed on a charging path of the rechargeable battery, the control unit applying a second constant current smaller than the first constant current from the power source unit to the rechargeable battery after the rechargeable battery is charged with the first constant current to a predetermined voltage.
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Communication from the Japanese Patent Office dispatched Jul. 14, 2009 in the related Japanese patent application No. 2005-193872.
Fujitsu Limited
Staas & Halsey , LLP
Tso Edward
Williams Arun
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