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US 7,375,493 B2Granted
Inductive battery charger
AssigneeMicrosoft Corporation
InventorsJohn Charles Calhoon, Leroy B. Keely, William Mitchell
Life of this patent
Estimating the term…
Abstract
An inductive charging system transfers energy by inductively coupling a source coil on a power source to a receiver coil for a battery charger. Source current may be received in the battery charger and converted for charging a battery pack. A wireless communication arrangement may also provide for authentication of devices that are allowed by the source to be powered or otherwise charged.
Claims21
A computer implemented method of providing inductive energy to a battery charger assembly, the method comprising the steps of:
- at the battery charger assembly, a coil wirelessly receiving a polling message from an inductive source by listening for the source to alternate between an energized state and a de-energized state at regular intervals, the polling message being received while the battery charger assembly is in a polling listening mode;
- transmitting a request for power to the source responsive to receiving the polling message;
- receiving inductive power via the coil from the source responsive to the request,
- displaying an object on a graphical user interface indicative of the step of receiving for indicating a type of power being received;
- outputting a direct current powered by the received inductive power;
- and
- supplying the direct current to a separate battery pack, the battery pack being detachable from the battery charger assembly.
4 more elements
An energy transfer apparatus, comprising:
- a power pickup coil for receiving inductive energy from an inductive power source and for transmitting power to a power supply;
- the power supply for receiving power from the power pickup coil and for transmitting power to an electrical load, and operatively connected to a processor unit;
- the electrical load for receiving power from the power supply and operatively connected to the processor unit;
- the processor unit for processing computer readable data, and operatively connected to the power supply, the electrical load, and a communications unit;
- a memory for storing computer readable data relevant to receiving power from an inductive energy source, and operatively connected to the processor unit, and,
- the communications unit operatively connected to the processor unit wherein the communications unit includes circuitry for receiving a polling message from the inductive power source, while in a polling listening mode, by listening for the inductive power source to alternate between an energized state and de-energized state at regular intervals, and transmitting a request for power message to the inductive power source.
3 more elements
An energy receiving apparatus, comprising:
- a power pickup coil for receiving inductive energy from an inductive power source and for transmitting power to a power supply;
- the power supply operatively connected to a processor unit, said power supply receiving power from the power pickup coil and transmitting power to a battery charging unit;
- the battery charging unit receiving power from the power supply to charge a battery unit;
- the processor unit operatively connected to the battery charging unit, the power supply, and a communications unit;
- said processor unit determining battery charging parameters;
- and
- a memory operatively connected to the processor unit for storing computer readable data including the battery charging parameters;
- the communications unit operatively connected to the processor unit and the memory wherein the communications unit includes circuitry for receiving a polling message from the inductive power source, while in a polling listening mode, by listening for the inductive power source to alternate between an energized state and de-energized state at regular intervals, and in response to receiving the polling message, transmitting a request for power message and the battery charging parameters to the inductive power source.
5 more elements
Dependencies are inferred from the claim text.