Method and apparatus for wireless power transfer

• US 9,859,719 B2
• Filed: 06/17/2013
• Issued: 01/02/2018
• Est. Priority Date: 06/17/2013
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Technologies Oy (Nokia Corporation)
• Inventors: Vuori, Petri, Kari, Juhani, Muurinen, Jari
• Primary Examiner(s): Deberadinis, Robert
• Application Number:
  US14/897,838
• Publication Number:
  US 20160126752A1
• Time in Patent Office: 1,660 Days
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Abstract

In accordance with an example embodiment of the present invention, an apparatus (200) comprises a wireless power transmitter (241) connectable to a power supply interface (201) and to a battery (204); power supply detection circuitry (213) configured to determine whether the power supply interface (201) is capable of powering the wireless power transmitter (241); wireless power control circuitry (220) configured to, in response to determining that the power supply interface (201) is capable of powering the wireless power transmitter (241), enable power delivery from the power supply interface (201) to the wireless power transmitter (241).

Claims

1. An apparatus, comprising:

a wireless power receiver connectable to a battery;

a wireless power transmitter connectable to a power supply interface and to the battery;

power supply detection circuitry configured to determine whether the power supply interface is capable of powering the wireless power transmitter;

wireless power control circuitry configured to, in response to determining that the power supply interface is capable of powering the wireless power transmitter, enable power delivery from the power supply interface to the wireless power transmitter, and configured to disable the wireless power receiver in response to determining that the power supply interface is capable of powering the wireless power transmitter.

2. The apparatus of claim 1, wherein the wireless power control circuitry is further configured to disable power delivery from the battery to the wireless power transmitter, in response to said determining that the power supply interface is capable of powering the wireless power transmitter.

3. The apparatus of claim 1, wherein the wireless power control circuitry is configured to enable the wireless power transmitter in response to determining that the power supply interface is capable of powering the wireless power transmitter.

4. The apparatus of claim 3, wherein the wireless power control circuitry is configured to enable the wireless power transmitter in response to detecting at least one of a predetermined transmitter orientation, an object in the proximity of a wireless power interface surface of the apparatus, and a user input to accept at least one parameter of wireless power transmission.

5. The apparatus of claim 4, wherein the wireless power transmitter is configured to detect whether the object is capable of receiving wireless power, and wherein the power control circuitry is further configured to enable power delivery from the power supply interface to the battery, in response to determining that the object is not capable of receiving wireless power.

6. The apparatus of claim 1, wherein the wireless power transmitter and wireless power receiver are operably connected to, or comprised in, a wireless power transceiver coil.

7. The apparatus of claim 1, wherein determining whether the power supply interface is capable of powering the wireless power transmitter comprises detecting whether a power supply is connected to the power supply interface or whether a power supply connected to the power supply interface is of a predetermined type.

8. The apparatus of claim 1, wherein determining whether the power supply is capable of powering the wireless power transmitter comprises detecting a current or a voltage at the power supply interface.

9. A method, comprising:

determining whether a power supply interface is capable of powering a wireless power transmitter;

in response to determining that the power supply interface is capable of powering the wireless power transmitter, enabling power delivery from the power supply interface to the wireless power transmitter and disabling a wireless power receiver.

10. The method of claim 9, further comprising:

in response to determining that the power supply interface is capable of powering the wireless power transmitter, disabling power delivery from the battery to the wireless power transmitter.

11. The method of claim 10, further comprising:

in response to determining that the power supply interface is capable of powering the wireless power transmitter, enabling the wireless power transmitter.

12. The method of claim 11, wherein enabling the wireless power transmitter is in response to detecting at least one of a predetermined transmitter orientation, an object in the proximity of a wireless power interface surface of the apparatus, or a user input to accept at least one parameter of wireless power transmission.

13. The method of claim 12, further comprising:

detecting whether the object is capable of receiving wireless power; and

in response to determining that the object is not capable of receiving wireless power, enabling power delivery from the power supply interface to the battery.

14. The method of claim 9, wherein the wireless power transmitter and wireless power receiver are connected to a wireless power transceiver coil.

15. The method of claim 9, wherein determining whether the power supply interface is capable of powering the wireless power transmitter comprises detecting whether a power supply is connected to the power supply interface or whether a power supply connected to the power supply interface is of a predetermined type.

16. The method claim 9, wherein determining whether the power supply is capable of powering the wireless power transmitter comprises detecting a current or a voltage at the power supply interface.

17. A computer program, comprising:

code configured to determine whether a power supply interface is capable of powering a wireless power transmitter; and

in response to determining that the power supply interface is capable of powering the wireless power transmitter, enable power delivery from the power supply interface to the wireless power transmitter and disable a wireless power receiver.

18. The computer program of claim 17, further comprising:

code configured to disable power delivery from the battery to the wireless power transmitter in response to determining that the power supply interface is capable of powering the wireless power transmitter.

19. The computer program of claim 17, further comprising:

code configured to enable the wireless power transmitter in response to determining that the power supply interface is capable of powering the wireless power transmitter.

20. A computer-readable medium encoded with instructions that, when executed by a computer, perform:

determining whether a power supply interface is capable of powering a wireless power transmitter;

in response to determining that the power supply interface is capable of powering the wireless power transmitter, enabling power delivery from the power supply interface to the wireless power transmitter and disabling a wireless power receiver.