Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Patent
1998-05-21
1999-10-05
Tso, Edward H.
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
With charging
H01M 1044, H01M 1046
Patent
active
059630159
ABSTRACT:
An external battery charger for supplying power from an AC adapter both to a portable electronic device and a battery includes: a DC input port connected to a DC output of the AC adapter and an extra DC output port connected to a DC input port of the portable electronic device, in which the DC output port is connected to a DC input port of the external battery charger. A load current detector is disposed in a power supply line connected to the extra DC output port for determining an amount of current drawn by the portable electronic device. Preferably, this charger includes a microcontroller, in response to an amount of the load current detected by the load current detector, producing a first control signal representing a load current approximately equal to a maximum current rate designated by the portable device, and producing a second control signal representing an amount of charging current being supplied to the battery through a charge regulator. The second control signal is supplied to the charge regulator for charging the battery with the remainder of the power used by the portable electronic device. Further, a switch is provided between the DC input port and the charge regulator for interrupting power supply line connected to the charge regulator, in response to the first control signal from the microcontroller. This provides for a maximization of the usage of a battery charger since power for the extra battery and the portable computer can be achieved simultaneously using only one AC adapter.
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Bushnell Esq. Robert E.
Samsung Electronics Co,. Ltd.
Tso Edward H.
LandOfFree
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