Dual rate charger for notebook computer
First Claim
Patent Images
1. An apparatus comprising:
- an alternating current (AC) adapter input to couple to an external AC adapter;
a main battery disposed within the computing device;
a main battery charger disposed within the computing device and coupled to the AC adapter input, the main battery charger to charge the main battery;
a first diode coupled between the main battery charger and the AC adapter input;
a processor and storage device disposed within the computing device to receive power from the main battery and coupled to receive power from the AC adapter input while bypassing the main battery charger;
a first external expansion battery connector coupled to the AC adapter input through the first diode, the first external expansion battery connector bypassing the main battery charger, the first external expansion battery connector to provide sufficient current from the AC adapter input to enable charging of an external expansion battery having an external battery charger at a rate higher than a maximum charge rate of the main battery charger, the external expansion battery external to the computing device;
a second external expansion battery connector coupled to the processor and storage device;
a second diode coupled between the second external expansion battery connector and the processor and storage device, the second diode to allow current to flow from the external expansion battery to the processor and storage device and the main battery charger; and
a third diode coupled between the main battery and the processor and storage device, the third diode electrically in parallel with the main battery charger and to allow current to flow from the main battery to the processor and storage device;
wherein the first diode is also coupled between the AC adapter input and the first external expansion battery connector, the first diode to allow current to flow to the main battery charger, the processor and storage device, and the first external expansion battery connector.
2 Assignments
0 Petitions
Accused Products
Abstract
A apparatus includes an AC adapter input, a main battery charger coupled to the input to charge a main battery, system logic to execute code stored on storage devices, and an expansion battery connector coupled to the input to provide sufficient current to enable charging of an expansion battery at a rate higher than a maximum charge rate of the main battery charger.
-
Citations
13 Claims
-
1. An apparatus comprising:
-
an alternating current (AC) adapter input to couple to an external AC adapter; a main battery disposed within the computing device; a main battery charger disposed within the computing device and coupled to the AC adapter input, the main battery charger to charge the main battery; a first diode coupled between the main battery charger and the AC adapter input; a processor and storage device disposed within the computing device to receive power from the main battery and coupled to receive power from the AC adapter input while bypassing the main battery charger; a first external expansion battery connector coupled to the AC adapter input through the first diode, the first external expansion battery connector bypassing the main battery charger, the first external expansion battery connector to provide sufficient current from the AC adapter input to enable charging of an external expansion battery having an external battery charger at a rate higher than a maximum charge rate of the main battery charger, the external expansion battery external to the computing device; a second external expansion battery connector coupled to the processor and storage device; a second diode coupled between the second external expansion battery connector and the processor and storage device, the second diode to allow current to flow from the external expansion battery to the processor and storage device and the main battery charger; and a third diode coupled between the main battery and the processor and storage device, the third diode electrically in parallel with the main battery charger and to allow current to flow from the main battery to the processor and storage device; wherein the first diode is also coupled between the AC adapter input and the first external expansion battery connector, the first diode to allow current to flow to the main battery charger, the processor and storage device, and the first external expansion battery connector. - View Dependent Claims (3, 4, 5, 6, 7, 8)
-
-
2. The apparatus of claim and further comprising a switch between the main battery charger and a connector for the main battery to selectively couple the main battery charger to a main battery when the main battery is present.
-
9. A method of providing power to a computing device, the method comprising:
-
detecting whether an AC adapter coupled to the computing device is capable of providing sufficient power to charge an expansion battery in an external expansion battery unit coupled external to the computing device; providing, when the AC adapter is coupled to the computing device, power from the AC adapter to a processor of the computing device through a first diode, bypassing a main battery charger electrically in parallel with the processor; setting at least one switch in the external expansion battery unit to enable current to flow to the expansion battery; providing a signal to control the at least one switch in the external expansion battery unit to enable an external expansion battery charger to charge the expansion battery at a rate higher than a maximum charge rate of the main battery charger; providing, by a second diode coupled between the expansion battery and the processor, power from the expansion battery to processor; providing, by a third diode electrically coupled in parallel with the main battery charger, power from a main battery internal to the computing device to the processor. - View Dependent Claims (10, 11, 12)
-
-
13. A system comprising:
-
a computing device comprising; an alternating current (AC) adapter input to couple to an external AC adapter; a main battery disposed within the computing device; a main battery charger disposed within the computing device and coupled to the AC adapter input, the main battery charger to charge the main battery; a first diode coupled between the main battery charger and the AC adapter input; a processor and storage device disposed within the computing device to receive power from the main battery and coupled to receive power from the AC adapter input while bypassing the main battery charger; a first expansion battery connector coupled to the AC adapter input through the first diode, the first external expansion battery connector bypassing the main battery charger, the first external expansion battery connector to provide sufficient current from the AC adapter input to enable charging of an external expansion battery having an external battery charger at a rate higher than a maximum charge rate of the main battery charger, the external expansion battery external to the computing device; a second expansion battery connector coupled to the processor and storage device; a second diode coupled between the second external expansion battery connector and the processor and storage device, the second diode to allow current to flow from the external expansion battery to the processor and storage device and the main battery charger; and a third diode coupled between the battery and the processor and storage device, the third diode electrically in parallel with the main battery charger and to allow current to flow from the battery to the processor and storage device; wherein the first diode is also coupled between the AC adapter input and the first external expansion battery connector, the first diode to allow current to flow to the main battery charger, the processor and storage device, and the first external expansion battery connector; and an expansion battery unit external to the computing device, the expansion battery unit comprising; a first connector to connect to computing device via the first and second expansion battery connectors; the expansion battery; the expansion battery charger having charge rate that is higher than a maximum charge rate of a main battery charger disposed within the computing device; a switch responsive to the external apparatus to selectively couple the expansion charger to the expansion battery and to receive charge current from the computing device higher than the maximum charge rate of the main battery charger of the computing device via the first expansion battery connector, wherein the higher charge current bypasses the main battery charger within the computing device; and a second connector coupled to the expansion battery for coupling to the computing device to provide power to the processor of the computing device, bypassing the main battery charger.
-
Specification