Battery powered charger
First Claim
1. A charger for a battery operated electronic device, said charger comprising:
- an input for connection to an external power source supplying current at a first voltage;
an output for connection to said battery operated electronic device;
circuitry for supplying said electronic device with current for charging or powering the electronic device when said charger is connected to said external source;
a cavity for mounting in said charger at least one battery having a terminal voltage different from said first voltage, and different from the voltage required for inputting to said electronic device, said battery supplying said electronic device with current when said charger is not connected to said external power source; and
a bidirectional converter and charge controller for controlling current supplied from said at least one battery mounted in said charger to said electronic device, and for controlling current flowing into said at least one battery when said charger is connected to said external power source.
1 Assignment
0 Petitions
Accused Products
Abstract
A charger for recharging the batteries of a portable electronic device even when no external power source is available. A battery or cell is installed within the charger, and when no access is available to a fixed power source into which the charger can be plugged, the internal battery or cell can be used to recharge the electronic device. The internal battery can be a primary battery or a secondary battery. In the latter case, the internal battery can be maintained in a charged state by means of circuitry which, when the charger is plugged into the external power source, charges the internal battery as well as the battery of the electronic device. The external power source can be either an AC power wall socket, in which case the charger includes AC/DC voltage conversion circuits, or a car lighter socket, or the DC output of a conventional wall charger.
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Citations
11 Claims
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1. A charger for a battery operated electronic device, said charger comprising:
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an input for connection to an external power source supplying current at a first voltage; an output for connection to said battery operated electronic device; circuitry for supplying said electronic device with current for charging or powering the electronic device when said charger is connected to said external source; a cavity for mounting in said charger at least one battery having a terminal voltage different from said first voltage, and different from the voltage required for inputting to said electronic device, said battery supplying said electronic device with current when said charger is not connected to said external power source; and a bidirectional converter and charge controller for controlling current supplied from said at least one battery mounted in said charger to said electronic device, and for controlling current flowing into said at least one battery when said charger is connected to said external power source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification