METHOD FOR DISTRIBUTING WIRELESS CHARGE POWER FOR MULTIPLE WIRELESS POWER RECEIVERS

• US 20160294220A1
• Filed: 11/19/2014
• Published: 10/06/2016
• Est. Priority Date: 11/19/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: HAN, Jae-Sung, KWON, Hyuk-Choon, KIM, Nam-Yun, JUNG, Soo-yeon, JUNG, Hee-Won
• Granted Patent: US 10,454,308 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• 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

Abstract

One embodiment of the present invention is capable of providing a method for efficiently transmitting power for multiple wireless power receivers by distributing the power of the wireless power receivers as power which matches the respective wireless power receivers in accordance with demand power information from the multiple wireless power receivers.

Claims

1. A method of distributing wireless charging power to a plurality of wireless power receivers in a wireless power transmitter, the method comprising:

transmitting power to the first wireless power receiver to then charge the same;

receiving demand power information of the second wireless power receiver;

determining power redistribution for the first wireless power receiver and the second wireless receiver based on the demand power information; and

transmitting the power according to the power redistribution to the first wireless power receiver and the second wireless receiver, respectively.

2. The method according to claim 1, wherein the demand power information contains maximum demand power information and limitation power information.

3. The method according to claim 1, further comprising receiving the demand power information that contains maximum demand power information and limitation power information of the first wireless power receiver before transmitting power to the first wireless power receiver and charging the same.

4. The method according to claim 1, wherein the determining of the power redistribution comprises:

determining whether or not to distribute the power corresponding to the maximum demand power of the second wireless power receiver based on an available charging power of the wireless power transmitter; and

distributing the power corresponding to the limitation power of the second wireless power receiver if it is impossible to distribute the power corresponding to the maximum demand power of the second wireless power receiver.

5. The method according to claim 4, further comprising informing the second wireless power receiver of available power information of the wireless power transmitter in order to thereby adjust the limitation power of the second wireless power receiver if it is impossible to distribute the power corresponding to the maximum demand power of the second wireless power receiver.

6. The method according to claim 5, further comprising receiving adjusted demand power information from the second wireless power receiver.

7. The method according to claim 1, further comprising recalculating the power for the first wireless power receiver and the second wireless receiver and supplying the same when the charging mode of at least one of the first wireless power receiver and the second wireless power receiver is changed.

8. The method according to claim 1, further comprising transmitting a load switch off command in order to switch the power for the first wireless power receiver that is being charged to the maximum demand power when the charging for the second wireless receiver is not necessary.

9. A wireless power transmitter for distributing wireless charging power to a plurality of wireless power receivers, the wireless power transmitter comprising:

a charging unit that transmits power to the first wireless power receiver to then charge the same;

a communication unit that receives demand power information of the second wireless power receiver; and

a controller that controls the charging unit to determine power redistribution for the first wireless power receiver and the second wireless receiver based on the demand power information, and to transmit the power according to the power redistribution to the first wireless power receiver and the second wireless receiver, respectively.

10. The wireless power transmitter according to claim 9, wherein the demand power information contains maximum demand power information and limitation power information.

11. The wireless power transmitter according to claim 9, wherein the communication unit receives the demand power information that contains maximum demand power information and limitation power information of the first wireless power receiver before transmitting power to the first wireless power receiver and charging the same.

12. The wireless power transmitter according to claim 9, wherein the controller determines whether or not to distribute the power corresponding to the maximum demand power of the second wireless power receiver based on an available charging power of the wireless power transmitter, and distributes the power corresponding to the limitation power of the second wireless power receiver if it is impossible to distribute the power corresponding to the maximum demand power of the second wireless power receiver.

13. The wireless power transmitter according to claim 12, wherein the controller controls the communication unit to inform the second wireless power receiver of available power information of the wireless power transmitter in order to thereby adjust the limitation power of the second wireless power receiver if it is impossible to distribute the power corresponding to the maximum demand power of the second wireless power receiver.

14. The wireless power transmitter according to claim 9, wherein the controller recalculates the power for the first wireless power receiver and the second wireless receiver and supplies the same when the charging mode of at least one of the first wireless power receiver and the second wireless power receiver is changed.

15. The wireless power transmitter according to claim 9, wherein the controller controls the communication unit to transmit a load switch off command in order to switch the power for the first wireless power receiver that is being charged to the maximum demand power when the charging for the second wireless receiver is not necessary.