Wireless power transmission system, and method for controlling wireless power transmission and wireless power reception

• US 9,729,013 B2
• Filed: 01/15/2015
• Issued: 08/08/2017
• Est. Priority Date: 03/23/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Nam Yun, Kwon, Sang Wook, Park, Yun Kwon
• Primary Examiner(s): Deberadinis, Robert
• Application Number:
  US14/597,503
• Publication Number:
  US 20150123491A1
• Time in Patent Office: 936 Days
• Field of Search: 307104
• CPC Class Codes: G01R 23/04 adapted for measuring in circuits having distributed constants
• CPC Class Codes: G01R 27/04 in circuits having distributed constants , e.g. having very long conductors or involving high frequencies
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

A wireless power transmission system, and a method for controlling wireless power transmission and wireless power reception are provided. According to an aspect, a method for controlling a wireless power transmission may include: detecting a plurality of target devices used to wirelessly receive power; selecting a source resonating unit from among a plurality of source resonating units, based on the amount of power to be transmitted to one or more of the plurality of target devices, a coupling factor associated with one or more of the plurality of target devices, or both; and wirelessly transmitting power to a target device using the selected source resonating unit.

Claims

1. A method for controlling a wireless power transmission, the method comprising:

detecting a target device for receiving wireless power;

selecting a power transmitting unit from a plurality of power transmitting units, based on at least one of an amount of power to be transmitted to the target device and identification information of the target device; and

transmitting wireless power to the target device via the selected power transmitting unit.

2. The method of claim 1, wherein the selecting comprises:

selecting the power transmitting unit transmitting the largest amount of power to the target device from the plurality of power transmitting units.

3. The method of claim 1, wherein the selecting comprises:

verifying a first power amount of power to be transmitted to a first target device adjacent to a first power transmitting unit, and a second power amount of power to be transmitted to a second target device adjacent to a second power transmitting unit; and

selecting the power transmitting unit between the first power transmitting unit and the second power transmitting unit, based on a result of the comparison between the first power amount and the second power amount.

4. The method of claim 3, wherein a first power receiving unit of the first target device is different in size from a second power receiving unit of the second target device.

5. The method of claim 3, wherein the selecting comprises:

selecting the power transmitting unit having the highest coupling factor with respect to one or more of the plurality of target devices from the plurality of power transmitting units.

6. The method of claim 1, wherein the selecting comprises:

selecting the power transmitting unit based on location information of the target device.

7. The method of claim 6, wherein the location information is determined based on identification information of the plurality of power transmitting units.

8. A method for controlling a wireless power transmission, the method comprising:

transmitting, to a target device, a detecting signal comprising identification information of a plurality of power transmitting unit;

receiving, from the target device, a response signal generated based on the identification information of the plurality of power transmitting unit;

determining a location of the target device based on the response signal;

selecting a power transmitting unit from the plurality of power transmitting units based on the location of the target device; and

transmitting wireless power to the target device via the selected power transmitting unit.

9. The method of claim 8, wherein the response signal comprising the identification information of the plurality of power transmitting unit.

10. The method of claim 8, wherein at least one of the amount of power to be transmitted to the target device, and the identification information of the target device, is received from the target device.

11. The method of claim 8, wherein the plurality of power transmitting units are identified by the identification information of the plurality of power transmitting units.

12. A wireless power receiver comprising:

a communication unit configured to transmit, to a wireless power transmitter, at least one of identification information of the wireless power receiver and information on an amount of power to be used in the wireless power receiver; and

a power receiving unit configured to receive wireless power from a power transmitting unit of the wireless power transmitter,

wherein the power transmitting unit is selected from a plurality of power transmitting units of the wireless power transmitter, based on at least of the identification information of the wireless power receiver and the information on the amount of power to be used in the wireless power receiver.

13. The wireless power receiver of claim 12, wherein the power receiving unit configured to receive wireless power from at least one of the power transmitting unit and a power receiving unit of another wireless power receiver.

14. The wireless power receiver of claim 13, wherein the power receiving unit receives the wireless power from the power transmitting unit when the amount of the power to be used in the wireless power receiver is greater than the amount of power to be used in the other wireless power receiver, and

wherein the power receiving unit receives the wireless power from the power receiving unit of the other wireless power receiver when the amount of the power to be used in the wireless power receiver is less than the amount of the power to be used in the other wireless power receiver.

15. The wireless power receiver of claim 13, wherein the communication unit configured to receive, from each of the plurality of power transmitting units, identification information of the plurality of power transmitting units.

16. The wireless power receiver of claim 15, wherein the plurality of power transmitting units are identified by the identification information of the plurality of power transmitting units.

17. A wireless power transmitting apparatus, the apparatus comprising:

a power transmitter having a plurality of power transmitting units; and

a controller configured to;

control to detect a target device configured to receive wireless power,

control to receive information on an amount of power required by the target device and identification information of the target device from the target device,

control to select a power transmitting unit from among the plurality of power transmitting units based on at least one of the amount of power and the identification information, and

control the power transmitter to transmit wireless power corresponding to the amount of power required by the target device via the selected power transmitting unit to the target device.

18. The wireless power transmitting apparatus of claim 17, wherein the controller is further configured to select the power transmitting unit for transmitting a largest amount of power to the target device from the plurality of power transmitting units.

19. The wireless power transmitting apparatus of claim 17, wherein the controller is further configured to:

verify a first power amount of power to be transmitted to a first target device adjacent to a first power transmitting unit, and a second power amount of power to be transmitted to a second target device adjacent to a second power transmitting unit; and

select a power transmitting unit to transmit the wireless power between the first power transmitting unit and the second power transmitting unit, based on a result of the comparison between the first power amount and the second power amount.

20. the wireless power transmitting apparatus of claim 19, wherein a first power receiving unit of the first target device is different in size from a second power receiving unit of the second target device.