Wireless charging system
First Claim
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1. A wireless charging system comprising:
- an inductive power supply for supplying wireless power; and
a remote device separable from said inductive power supply, wherein said remote device includes a secondary power circuit, a charge storage capacitor, a charging subcircuit, and a battery;
said secondary power circuit is electrically connected to said charge storage capacitor and said secondary power circuit is configured to receive wireless power from said inductive power supply and rapidly charge said charge storage capacitor;
said charging subcircuit is electrically connected to said charge storage capacitor and said battery;
wherein, in response to said charge storage capacitor reaching a predetermined voltage, said charging subcircuit charges said battery with power stored in said charge storage capacitor;
wherein said secondary power circuit sends charge information to said inductive power supply; and
wherein operation of said inductive power supply is adjusted based on said charge information received from said secondary power circuit.
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Abstract
The present invention provides wireless power supply systems that wirelessly supply power to a remote device for rapidly charging a charge storage capacitor, which charges a battery with the power stored in the charge storage capacitor. This allows the remote device to be positioned near the inductive power supply for rapid charging of the charge storage capacitor and allows battery charging to continue even after the remote device is removed from the inductive power supply.
166 Citations
17 Claims
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1. A wireless charging system comprising:
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an inductive power supply for supplying wireless power; and a remote device separable from said inductive power supply, wherein said remote device includes a secondary power circuit, a charge storage capacitor, a charging subcircuit, and a battery; said secondary power circuit is electrically connected to said charge storage capacitor and said secondary power circuit is configured to receive wireless power from said inductive power supply and rapidly charge said charge storage capacitor; said charging subcircuit is electrically connected to said charge storage capacitor and said battery; wherein, in response to said charge storage capacitor reaching a predetermined voltage, said charging subcircuit charges said battery with power stored in said charge storage capacitor; wherein said secondary power circuit sends charge information to said inductive power supply; and wherein operation of said inductive power supply is adjusted based on said charge information received from said secondary power circuit. - View Dependent Claims (2, 3, 4, 5, 16)
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6. A remote device for receiving wireless power from an inductive power supply, said remote device comprising:
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a secondary power circuit configured to receive wireless power; a charge storage capacitor electrically connected to said secondary power circuit, wherein said secondary power circuit is configured to rapidly charge said charge storage capacitor; a battery; and a charging subcircuit electrically connected to said charge storage capacitor and said battery, wherein said charging subcircuit is configured to charge said battery with power stored in said charge storage capacitor; wherein said charging subcircuit charges said battery with power stored in said charge storage capacitor in response to said charge storage capacitor reaching a predetermined threshold; wherein said secondary power circuit sends charge information to the inductive power supply; and wherein operation of the inductive power supply is adjusted based on said charge information received from said secondary power circuit. - View Dependent Claims (7, 8, 9, 10, 11, 17)
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12. A method for rapidly charging the battery of a remote device, said method comprising:
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generating an electromagnetic field with an inductive power supply; positioning a remote device with a secondary power circuit in the electromagnetic field to induce electrical power within the secondary power circuit; rapidly charging a charge storage capacitor in the secondary power circuit with the induced power; in response to reaching a predetermined voltage in the charge storage capacitor, charging the battery of the remote device with the power stored in the charge storage capacitor; sending charge information from the secondary power circuit to the inductive power supply; and adjusting operation of the inductive power supply based on the charge information received from the secondary power circuit. - View Dependent Claims (13, 14, 15)
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Specification