Wireless power repeating

• US 10,110,018 B2
• Filed: 12/23/2014
• Issued: 10/23/2018
• Est. Priority Date: 12/23/2014
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Yang, Songnan, Elkhouly, Essam, Tadros, Karim H., Lin, Xintian E., Kasturi, Sreenivas
• Primary Examiner(s): Borroto, Alfonso Perez
• Application Number:
  US14/580,609
• Publication Number:
  US 20160181822A1
• Time in Patent Office: 1,400 Days
• Field of Search: 307104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/50 using additional energy repeaters between transmitting devices and receiving devices
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

Techniques for wireless charging in a system, method, and apparatus are described herein. For example, the apparatus includes a first wireless power receiving coil configured to receive power from a first wireless power transmitting coil of a wireless charger. The apparatus also includes a second wireless power transmitting coil coupled to the first wireless power receiving coil, wherein the second wireless power transmitting coil is configured to propagate current resulting in a magnetic field.

Claims

1. An apparatus for wireless power repeating, comprising:

a first wireless power receiving coil configured to receive power from a first wireless power transmitting coil of a wireless charger;

a second wireless power transmitting coil coupled to the first wireless power receiving coil, wherein the second wireless power transmitting coil is configured to propagate current resulting in a magnetic field; and

a phase shifting component to convert a first load resistance associated with the second wireless power transmitting coil to a second load resistance associated with the first wireless power receiving coil.

2. The apparatus of claim 1, wherein a flux of the magnetic field is configured to be received at a second wireless power receiving coil of a chargeable device.

3. The apparatus of claim 1, further comprising the phase shifting component coupling the first wireless power receiving coil to the second wireless power transmitting coil, and wherein the phase shifting component is configured to generate an impedance inversion.

4. The apparatus of claim 3, wherein the wireless charger is configured to provide a constant current based on loads associated a presence of chargeable devices at the second wireless power receiving coil.

5. The apparatus of claim 3, wherein the phase shifting component is configured to generate a quarter wavelength phase shift.

6. The apparatus of claim 3, wherein the phase shifting component comprises:

a plurality of inductors; and

a plurality of capacitors.

7. The apparatus of claim 3, wherein the phase shifting component comprises a transformer.

8. The apparatus of claim 7, wherein the phase shifting component comprises a transmission line of a length configured to generate the quarter wavelength phase shift.

9. The apparatus of claim 1, wherein the apparatus comprises a portion having a concave shape, and wherein the wireless power receiving coil is formed at a bottom or a side of the apparatus, and wherein turns of the second wireless power transmitting coil are embedded within the curve of the concave shape.

10. The apparatus of claim 1, wherein the apparatus is integrated within a first chargeable device, and wherein the first chargeable device is configured to receive charge from the power provided by the first wireless power transmitting coil, and emit the magnetic field at the second wireless power transmitting coil based on a presence second chargeable device.

11. A method for wireless power repeating, comprising:

forming a first wireless power receiving coil configured to receive power from a first wireless power transmitting coil of a wireless charger;

forming a second wireless power transmitting coil coupled to the first wireless power receiving coil, wherein the second wireless power transmitting coil is configured to propagate current resulting in a magnetic field; and

forming a phase shifting component configured to convert a first load resistance associated with the second wireless power transmitting coil to a second load resistance associated with the first wireless power receiving coil.

12. The method of claim 11, wherein a flux of the magnetic field is to be received at a second wireless power receiving coil of a chargeable device.

13. The method of claim 11, further comprising forming the phase shifting component coupling the first wireless power receiving coil to the second wireless power transmitting coil, and wherein the phase shifting component is configured to generate an impedance inversion.

14. The method of claim 13, wherein the wireless charger is configured to provide a constant current based on loads associated a presence of chargeable devices at the second wireless power receiving coil.

15. The method of claim 13, wherein the phase shifting component is configured to generate a quarter wavelength phase shift.

16. The method of claim 13, wherein forming the phase shifting component comprises:

forming a plurality of inductors; and

forming a plurality of capacitors.

17. The method of claim 13, wherein forming the phase shifting component comprises coupling the wireless power receiving coil to the second wireless power transmitting coil via a transformer.

18. The method of claim 17, wherein forming the phase shifting component comprises coupling the wireless power receiving coil to the second wireless power transmitting coil via a transmission line of a length configured to generate the quarter wavelength phase shift.

19. The method of claim 11, further comprising:

embedding turns of the second wireless power transmitting coil a curve of a concave shaped device; and

disposing the wireless power receiving coil is formed at a bottom or side of the concave shaped device.

20. The method of claim 11, wherein the first wireless power receiving coil and the second wireless power transmitting coil are formed in a first chargeable device, and wherein the first chargeable device is configured to receive charge from the power provided by the first wireless power transmitting coil, as well as emit the magnetic field at the second wireless power transmitting coil based on a presence second chargeable device.

21. A system for wireless power repeating, comprising:

a first wireless power receiving coil configured to receive power from a first wireless power transmitting coil of a wireless charger; and

a second wireless power transmitting coil coupled to the first wireless power receiving coil, wherein the second wireless power transmitting coil is configured to propagate current resulting in a magnetic field; and

a phase shifting component coupling the first wireless power receiving coil to the second wireless power transmitting coil, and wherein the phase shifting component is configured to generate an impedance inversion, and wherein the phase shifting component is configured to convert a first load resistance associated with the second wireless power transmitting coil to a second load resistance associated with the first wireless power receiving coil.

22. The system of claim 21, wherein a flux of the magnetic field is to be received at a second wireless power receiving coil of a chargeable device.

23. The system of claim 21, wherein the impedance inversion is associated with a quarter wavelength phase shift.

24. The system of claim 21, wherein a flux of the magnetic field is to be received at a second wireless power receiving coil of a chargeable device, and wherein the phase shifting component is configured to boost power received at the chargeable device.

25. The system of claim 21, wherein the system is a component of a first chargeable device, and wherein the first chargeable device is configured to be charged by the power provided by the first wireless power transmitting coil, as well as emit the magnetic field at the second wireless power transmitting coil based on a presence second chargeable device.