WIRELESS POWER TRANSFER METHOD, APPARATUS AND SYSTEM

• US 20170201123A1
• Filed: 07/06/2015
• Published: 07/13/2017
• Est. Priority Date: 07/07/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: PARK, Yongcheol
• Granted Patent: US 10,291,068 B2
• Time in Patent Office: Days
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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

Abstract

A wireless power transmitter is provided which performs communication with a wireless power receiver through multiple slots. The wireless power transmitter comprises: a power converter consisting of at least one coil to convert a current into a magnetic field; and a power transmission controller that receives information associated with a power transfer phase from the wireless power receiver through at least one of the multiple slots, during the transfer of power to the wireless power receiver through the power converter, wherein the information associated with the power transfer phase contains a slot number assigned to the wireless power receiver.

Claims

1. A wireless power transmitter which performs communication with one or more wireless power receivers through multiple slots, the wireless power transmitter comprising:

a power converter consisting of at least one coil configured to convert a current into a magnetic field; and

a power transmission controller configured to receive information associated with a power transfer phase from each of the one or more wireless power receivers through at least one of the multiple slots, during the transfer of power to the each of the one or more wireless power receivers through the power converter,

wherein the information associated with the power transfer phase contains each of slot numbers of each of slots assigned to the each of the one or more wireless power receivers.

2. The wireless power transmitter of claim 1, wherein the information associated with the power transfer phase is at least either an end power transfer packet, a charge status packet, or proprietary data packets.

3. The wireless power transmitter of claim 2, wherein the end power transfer packet contains a slot number and an end power transfer code.

4. The wireless power transmitter of claim 2, wherein the charge status packet contains a slot number and a charge status value.

5. The wireless power transmitter of claim 1, wherein the each of slot numbers is an unsigned integer.

6. The wireless power transmitter of claim 1, wherein the each of slots assigned to the each of the one or more wireless power receivers is configured to receive control information from the each of the one or more wireless power receiver.

7. The wireless power transmitter of claim 1, wherein the at least one slot is a free slot.

8. The wireless power transmitter of claim 7, wherein the free slot is a slot through which the information associated with the power transfer phase is received from either the each of the one or more wireless power receiver or another wireless receiver.

9. The wireless power transmitter of claim 1, wherein the at least one slot is one of the multiple slots apart from the each of slots assigned to the each of one or more wireless power receivers.

10. A method of controlling a wireless power transmitter performing communication with one or more wireless power receivers through multiple slots, the method comprising:

transmitting power to each of the one or more the wireless power receivers in a wireless manner; and

receiving information associated with a power transfer phase from each of the one or more wireless power receivers through at least one of the multiple slots, during the transfer of power to the wireless power receiver,

wherein the information associated with the power transfer phase contains each of slot numbers of each of slots assigned to the each of the one or more wireless power receivers.

11. The method of claim 10, wherein the information associated with the power transfer phase is at least either an end power transfer packet, a charge status packet, or proprietary data packets.

12. The method of claim 11, wherein the end power transfer packet contains the slot number and an end power transfer code.

13. The method of claim 11, wherein the charge status packet contains the slot number and a charge status value.

14. The method of claim 10, wherein each of slots assigned to the each of the one or more wireless power receivers is configured to receive control information from the each of the one or more wireless power receivers.

15. The method of claim 10, wherein the at least one slot is a free slot.

16. The method of claim 15, wherein the free slot is a slot through which the information associated with the power transfer phase is received from either the each of the one or more wireless power receiver or another wireless receiver.

17. The method of claim 10, wherein the at least one slot is one of the multiple slots, apart from the each of slots assigned to the wireless power receiver.

18. A wireless power receiver which performs communication with a wireless power transmitter through multiple slots, the wireless power receiver comprising:

a power receiving part consisting of at least one coil to convert a current into a magnetic field; and

a power reception controller that transmits information associated with a power transfer phase to the wireless power transmitter through at least one of the multiple slots, during the reception of power from the wireless power transmitter through the power receiving unit,

wherein the information associated with the power transfer phase contains a slot number assigned to the wireless power receiver.

19. The wireless power receiver of claim 18, wherein the information associated with the power transfer phase is at least either an end power transfer packet, a charge status packet, or proprietary data packets.

20. A method of controlling a wireless power receiver performing communication with a wireless power transmitter through multiple slots, the wireless power receiver comprising:

a power receiving part consisting of at least one coil to convert a current into a magnetic field; and

a power reception controller that transmits information associated with a power transfer phase to the wireless power transmitter through at least one of the multiple slots, during the reception of power from the wireless power transmitter through the power receiving unit,

wherein the information associated with the power transfer phase contains a slot number assigned to the wireless power receiver.