Wireless power transmission apparatus and method

• US 10,367,381 B2
• Filed: 02/17/2017
• Issued: 07/30/2019
• 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): Perez Borroto, Alfonso
• Assistant Examiner(s): Yeshaw, Esayas G
• Application Number:
  US15/435,788
• Publication Number:
  US 20170163097A1
• Time in Patent Office: 893 Days
• 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 transmitting device, comprising:

a communication unit; and

at least one processor configured to;

control to receive requested power information from at least one power receiving device,

determine whether to support a requested power based on a power capacity of the wireless power transmitting device, wherein the power capacity is a total power amount which the wireless power transmitting device is capable of transmitting to the at least one power receiving device,

calculate a charging power for the at least one power receiving device based on a result of the determination, wherein the charging power is to be transmitted to the at least one power receiving device based on the requested power information received from the at least one power receiving device, and

re-calculate the charging power for the at least one power receiving device based on charging status information received from the at least one power receiving device.

2. The wireless power transmitting device of claim 1, wherein the at least one processor is further configured to determine, based on the requested power information, whether the at least one power receiving device is capable of being charged within a range of the power capacity.

3. The wireless power transmitting device of claim 2, wherein based on the requested power exceeding the range of the power capacity, the at least one processor is further configured to determine, based on a received information about a charging support power of the at least one power receiving device, the charging power.

4. The wireless power transmitting device of claim 1, wherein the at least one processor is further configured to control to transmit information about the re-calculated charging power to the at least one power receiving device.

5. The wireless power transmitting device of claim 1, wherein the at least one processor is further configured to:

identify a charging support mode of the at least one power receiving device,

perform a calculation based on the requested power and a ratio corresponding to the identified charging support mode, and

determine a result of the calculation as the charging power.

6. The wireless power transmitting device of claim 1, wherein the charging status information comprises at least one of information about a complete charging state of the at least one power receiving device, information about a current charging level of the at least one power receiving device compared to the complete charging state, and information regarding whether a charging mode of the at least one power receiving device is switched to a constant voltage (CV) mode.

7. The wireless power transmitting device of claim 1, wherein the at least one processor is further configured to control to re-calculate the charging power in response to the communication unit receiving constant voltage (CV) mode switching information from another power receiving device, the CV mode switching information indicating that a charging mode of the other power receiving device has been switched to the CV mode.

8. A wireless power transmitting method, comprising:

receiving requested power information from at least one power receiving device;

determining whether to support a requested power based on a power capacity of the wireless power transmitting device, wherein the power capacity is a total power amount which the wireless power transmitting device is capable of transmitting to the at least one power receiving device;

calculating a charging power for the at least one power receiving device based on a result of the determination, wherein the charging power is to be transmitted to the at least one power receiving device; and

re-calculating the charging power for the at least one power receiving device based on charging status information received from the at least one power receiving device.

9. The method of claim 8, further comprise determining, based on the requested power information, whether the at least one power receiving device is capable of being charged within a range of the power capacity.

10. The method of claim 9, wherein the calculating comprises based on the requested power exceeding a range of the power capacity, determining, based on a received information about a charging support power of the at least one power receiving device, the charging power.

11. The method of claim 8, further comprises transmitting information about the re-calculated charging power to the at least one power receiving device.

12. The method of claim 8, wherein the calculating comprises:

identifying a charging support mode of the at least one power receiving device,

performing a calculation based on the requested power and a ratio corresponding to the identified charging support mode, and

determining a result of the calculation as the charging power.

13. The method of claim 8, wherein the charging status information comprises at least one of information about a complete charging state of the at least one power receiving device, information about a current charging level of the at least one power receiving device compared to the complete charging state, and information regarding whether a charging mode of the at least one power receiving device is switched to a constant voltage (CV) mode.

14. The method of claim 8, wherein the re-calculating comprises re-calculating the charging power in response to the communication unit receiving constant voltage (CV) mode switching information from another power receiving device, the CV mode switching information indicating that a charging mode of the other power receiving device has been switched to the CV mode.