Electricity: battery or capacitor charging or discharging – Battery or cell charging
Reexamination Certificate
1999-03-16
2001-03-20
Wong, Peter S. (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
C307S150000
Reexamination Certificate
active
06204637
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates in general to a method and system for data processing and in particular to an improved method and system for automatically shutting off power to a battery in a data processing system when the battery is fully charged. Still more particularly, the present invention relates to a method and system for automatically shutting off power to a battery in a data processing system utilizing a remotely located power adapter.
2. Description of the Related Art
Power adapters used with portable computers produce power continuously upon connection to a wall outlet, whether or not the portable computer is connected to the power adapter. This power production creates an unnecessary waste, especially when users leave their adapters semi-permanently connected either to a docking device or a multi-port adapter. Further, this can be a safety hazard due to heat dissipated by these devices.
Consequently, it would be desirable to provide a power adapter that automatically shuts off after the portable computer's battery is fully charged, or leaves itself on when the portable computer is being used, and then turns off when the portable computer is either disconnected or turned off. The subject invention herein solves all of these problems in a new and unique manner that has not been part of the art previously.
SUMMARY OF THE INVENTION
It is therefore one object of the present invention to provide an improved method and system for a power adapter that automatically shuts power off to a battery when the battery is fully charged.
It is another object of the present invention to provide an improved method and system for a power adapter that prevents unnecessary power drain while simultaneously preventing devices from overheating.
The foregoing objects are achieved as is now described. A method and system for supplying external electrical power to charge a battery within a data processing system by utilizing an automated remotely located power adapter is disclosed. The automated remotely located power adapter includes a state control logic circuit for determining when to supply external electrical power to charge the battery and an auto-close detection circuit for automatically shutting on and off the external electrical power in response to the state control logic. The automated remotely located power adapter is connectable between the external power supply and the data processing system for supplying external electrical power to charge the battery within the data processing system and automatically shuts off the external electrical power when the data processing system indicates that the battery is fully charged.
The above as well as additional objects, features, and advantages of the present invention will become apparent in the following detailed written description.
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Bogdon Bernard D.
Dillon Andrew
International Business Machines - Corporation
Toatley Jr. Gregory J
Wong Peter S.
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