Wireless power transmission apparatus and method

• US 9,614,392 B2
• Filed: 05/16/2014
• Issued: 04/04/2017
• Est. Priority Date: 05/16/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Nam Yun, Kwon, Hyuk Choon, Kwon, Sang Wook, Kim, Ki Young, Kim, Dong Zo, Jung, Soo Yeon
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): OMAR, AHMED H
• Application Number:
  US14/280,025
• Publication Number:
  US 20140340033A1
• Time in Patent Office: 1,054 Days
• Field of Search: 320108
• 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 50/80 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
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]

Abstract

A wireless power transmission apparatus for tracking a charging capacity of each of a plurality of wireless power reception apparatuses in an environment in which the plurality of wireless power reception apparatuses are charged includes a communication unit configured to receive information about either one or both of a charging support power and a requested power from each of the plurality of wireless power reception apparatuses, a controller configured to determine a charging capacity for a wireless power reception apparatus supporting the charging support power among the plurality of wireless power reception apparatuses based on the information about the charging support power, and a power tracker configured to re-track the determined charging capacity based on charging status information received from the plurality of wireless power reception apparatuses.

Claims

1. A wireless power transmission apparatus for tracking a charging capacity of each of a plurality of wireless power reception apparatuses in an environment in which the plurality of wireless power reception apparatuses are charged, the wireless power transmission apparatus comprising:

a communication unit configured to receive information about either one or both of a charging support power and a requested power from each of the plurality of wireless power reception apparatuses;

a controller configured to determine, based on a comparison between information about a power capacity of the wireless power transmission apparatus and the received information about the charging support power from each of the plurality of wireless power reception apparatuses, a charging capacity for a first wireless power reception apparatus among the plurality of wireless power reception apparatuses; and

a power tracker configured to re-track, based on charging status information received from the plurality of wireless power reception apparatuses, the determined charging capacity.

2. The wireless power transmission apparatus of claim 1, wherein:

the communication unit is further configured to receive the information about the requested power from each of the plurality of wireless power reception apparatuses; and

the controller comprises a determiner configured to determine, based on the received information about the requested power received from each of the plurality of wireless power reception apparatuses, whether the plurality of wireless power reception apparatuses are capable of being charged within a range of the power capacity of the wireless power transmission apparatus.

3. The wireless power transmission apparatus of claim 2, wherein the controller is further configured to determine, based on the received information about the charging support power from the first wireless power reception apparatus and in response to a total amount of power requested by the plurality of wireless power reception apparatuses exceeding the range of the power capacity of the wireless power transmission apparatus, the charging capacity for the first wireless power reception apparatus.

4. The wireless power transmission apparatus of claim 1, wherein the controller comprises a calculator configured to calculate, based on a charging support mode provided by the first wireless power reception apparatus, the charging capacity for the first wireless power reception apparatus.

5. The wireless power transmission apparatus of claim 1, wherein:

the communication unit is further configured to receive constant voltage (CV) mode switching information indicating that a charging mode of the first wireless power reception apparatuses has been switched to a CV mode; and

the power tracker is further configured to readjust, in response to the communication unit receiving the CV mode switching information from the first wireless power reception apparatus, a charging capacity for a second wireless power reception apparatus among the plurality of wireless power reception apparatuses to be a requested power of the second wireless power reception apparatus.

6. The wireless power transmission apparatus of claim 1, wherein at least one of the plurality of wireless power reception apparatuses is configured to support the requested power and not support the charging support power.

7. The wireless power transmission apparatus of claim 1, wherein the communication unit is further configured to receive the charging status information from the first wireless power reception apparatus to be charged with the determined charging capacity.

8. The wireless power transmission apparatus of claim 1, wherein the communication unit is further configured to transmit information about the determined charging capacity to the first wireless power reception apparatus.

9. A wireless power transmission apparatus for determining whether each of a plurality of wireless power reception apparatuses is to be charged and tracking a charging capacity in an environment in which the plurality of wireless power reception apparatuses are charged, the wireless power transmission apparatus comprising:

a communication unit configured to receive information about either one or both of a charging support power and a requested power from each of the plurality of wireless power reception apparatuses;

a controller configured to determine whether charging capacities of the plurality of wireless power reception apparatuses are within a range of a power capacity of the wireless power transmission apparatus based on the information about the either one or both of the charging support power and the requested power; and

a display unit configured to display a capacity exceeded message in response to the controller determining that the charging capacities exceed the range of the power capacity.

10. The wireless power transmission apparatus of claim 9, further comprising a verifier configured to verify, after the capacity exceeded message has been displayed, whether the plurality of wireless power transmission apparatuses comprises a wireless power reception apparatus located out of a charging area of the wireless power transmission apparatus.

11. The wireless power transmission apparatus of claim 9, wherein:

the communication unit is further configured to re-receive, after the capacity exceeded message has been displayed, information about the either one or both of the charging support power and the requested power; and

the controller is further configured to determine, based on the re-received information about the either one or both of the charging support power and the requested power, a charging capacity for a first wireless power reception apparatus among the plurality of wireless power reception apparatuses.

12. The wireless power transmission apparatus of claim 11, further comprising a power tracker configured to re-track, based on charging status information received from the plurality of wireless power reception apparatuses, the determined charging capacity.

13. The wireless power transmission apparatus of claim 9, wherein:

the communication unit is further configured to receive the information about the requested power from each of the plurality of wireless power reception apparatuses; and

the controller is further configured to determine, based on the power capacity of the wireless power transmission apparatus and the information about the requested power received from the plurality of wireless power reception apparatuses, a combination of wireless power reception apparatuses among the plurality of power reception apparatuses to be charged to be a combination of wireless power transmission apparatuses minimizing a residual amount of the power capacity of the wireless power transmission apparatus.

14. The wireless power transmission apparatus of claim 9, wherein the controller is further configured to determine a combination of wireless power reception apparatuses among the plurality of power reception apparatuses to be charged to be a combination of a maximum number of wireless power reception apparatuses capable of being charged within the range of the power capacity of the wireless power transmission apparatus.

15. The wireless power transmission apparatus of claim 9, further comprising a recognizer configured to recognize an external power;

supply,

wherein the controller is further configured to determine, based on a power capacity of the external power supply and the information about the either one or both of the charging support power and the requested power received from the plurality of wireless power reception apparatuses, a charging capacity for a first wireless power reception apparatus among the plurality of wireless power reception apparatuses.

16. A wireless power transmission method of a wireless power transmission apparatus for tracking a charging capacity of each of a plurality of wireless power reception apparatuses in an environment in which the plurality of wireless power reception apparatuses are charged, the method comprising:

receiving information about either one or both of a charging support power and a requested power from each of the plurality of wireless power reception apparatuses;

determining, based on a comparison between information about a power capacity of the wireless power transmission apparatus and the information about the charging support power received from a first wireless power reception apparatus among the plurality of wireless power reception apparatuses, a charging capacity for the first wireless power reception apparatus; and

re-tracking, based on charging status information received from the plurality of wireless power reception apparatuses, the determined charging capacity.

17. The method of claim 16, wherein:

the receiving comprises receiving the information about the requested power from each of the plurality of wireless power reception apparatuses; and

the determining comprises determining, based on the information about the requested power received from each of the plurality of wireless power reception apparatuses, whether the plurality of wireless power reception apparatuses are capable of being charged within a range of the power capacity of the wireless power transmission apparatus.

18. The method of claim 17, wherein the determining comprises determining, based on the information about the charging support power received from the first wireless power reception apparatus and in response to a total amount of power requested by the plurality of wireless power reception apparatuses exceeding the range of the power capacity of the wireless power transmission apparatus, the charging capacity for the wireless power reception apparatus supporting the charging support power.

19. The method of claim 16, wherein the determining comprises calculating, based on a charging support mode provided by the first wireless power reception apparatus, the charging capacity for the first wireless power reception apparatus.

20. The method of claim 16, further comprising receiving the charging status information from the first wireless power reception apparatus to be charged with the determined charging capacity.

21. A wireless power transmission apparatus for tracking a charging capacity of each of a plurality of wireless power reception apparatuses in an environment in which the plurality of wireless power reception apparatuses are charged, the wireless power transmission apparatus comprising:

a communication unit configured to receive;

information about a charging support power and a requested power from each of ones of the plurality of wireless power reception apparatuses supporting the charging support power;

information about a requested power from each of other ones of the plurality of wireless power reception apparatuses not supporting the charging support power; and

charging status information from each of the plurality of wireless power reception apparatuses;

a controller configured to allocate, based on the information about the charging support power and the requested power, respective charging capacities to the plurality of wireless power reception apparatuses so that a sum of the allocated charging capacities does not exceed a range of a power capacity of the wireless power transmission apparatus; and

a power tracker configured to reallocate, based on the charging status information, the respective charging capacities.

22. The wireless power transmission apparatus of claim 21, wherein the controller is further configured to:

determine whether a sum of the requested powers of the plurality of wireless power reception apparatuses exceeds the range of the power capacity of the wireless power transmission apparatus;

allocate the respective charging capacities based on the information about the requested power received from each of the plurality of wireless power reception apparatuses in response to a result of the determining being that the sum of the requested powers of the plurality of wireless power reception apparatuses does not exceed the range of the power capacity of the wireless power transmission apparatus; and

allocate the respective charging capacities based on the information about the charging support power received from each of the ones of the plurality of wireless power reception apparatuses supporting the charging support power and the requested power received from each of the other ones of the plurality of wireless power reception apparatuses not supporting the charging support power in response to a result of the determining being that the sum of the requested powers of the plurality of wireless power reception apparatuses exceeds the range of the power capacity of the wireless power transmission apparatus.

23. The wireless power transmission apparatus of claim 21, wherein:

the communication unit is further configured to receive constant voltage (CV) mode switching information indicating that a charging mode has been switched to a CV mode from ones of the plurality of wireless power reception apparatuses in which a charging mode has been switched to the CV mode; and

the power tracker is further configured to reallocate, based on the charging status information and the CV mode switching information, the respective charging capacities.

24. The wireless power transmission apparatus of claim 21, wherein the controller is further configured to:

determine, based on the information about the charging support power and the requested power, whether the wireless power transmission apparatus is capable of charging all of the wireless power reception apparatuses simultaneously;

generate, in response to a result of the determining being that the wireless power transmission apparatus is not capable of charging all of the wireless power reception apparatuses simultaneously, a removal request message requesting that one of the wireless power reception apparatuses be removed from a charging area of the wireless power transmission apparatus; and

allocate, after one of the wireless power reception apparatuses has been removed from the charging area of the wireless power transmission apparatus, respective charging capacities to remaining ones of the plurality of wireless power reception apparatuses.

25. The wireless power transmission apparatus of claim 21, wherein the controller is further configured to:

determine, based on the information about the charging support power and the requested power, whether the wireless power transmission apparatus is capable of charging all of the wireless power reception apparatuses simultaneously; and

allocate, in response to a result of the determining being that the wireless power transmission apparatus is not capable of charging all of the wireless power reception apparatuses simultaneously, respective charging capacities to only ones of the plurality of wireless power reception apparatuses that the wireless power transmission apparatus is capable of charging simultaneously.