Wireless charging pad with interdependent temperature control and method therefor

• US 9,954,387 B2
• Filed: 09/01/2015
• Issued: 04/24/2018
• Est. Priority Date: 09/01/2015
• Status: Active Grant

• Current Assignee: Dell Products LP (Dell Technologies Inc.)
• Original Assignee: Dell Products LP (Dell Technologies Inc.)
• Inventors: Sultenfuss, Andrew T., North, Travis C.
• Primary Examiner(s): Dinh, Paul
• Application Number:
  US14/842,788
• Publication Number:
  US 20170063131A1
• Time in Patent Office: 966 Days
• Field of Search: 320108
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H02J 7/007192 in response to temperature

Abstract

A wireless power transmission antenna is disposed at a wireless charging mat. Another second wireless power transmission antenna is disposed at another location at the wireless charging mat. A temperature sensor is disposed at a location between the antennas. The temperature sensor is responsive to heat propagated from both of the antennas. A controller regulates charging power at each antenna based on information provided by the temperature sensor.

Claims

1. A wireless charging device comprising:

a first wireless power transmission antenna disposed at a first location at a wireless charging mat;

a second wireless power transmission antenna disposed at a second location at the wireless charging mat;

a first distal temperature sensor disposed at a location between the first antenna and the second antenna, the first distal temperature sensor responsive to heat propagated from the first antenna and heat propagated from the second antenna; and

a controller to regulate charging power at the first antenna and at the second antenna based on information provided by the first distal temperature sensor.

2. The device of claim 1, further comprising:

a first proximal temperature sensor located at the first antenna; and

wherein the controller is further to regulate charging power at the first antenna and at the second antenna based on information provided by the first proximal temperature sensor.

3. The device of claim 1, wherein the controller is further to regulate charging power at the first antenna based on information provided by a first remote temperature sensor located at a data processing device that is receiving power from the first antenna.

4. The device of claim 1, wherein the controller is further to regulate charging power at the second antenna based on information provided by a first remote temperature sensor located at a data processing device that is receiving power from the first antenna.

5. The device of claim 1, wherein the controller is further to:

determine an operating temperature specification associated with a first data processing device that is receiving power from the first antenna; and

regulate charging power at the first antenna based on the operating temperature specification.

6. The device of claim 1, wherein the controller is further to:

determine an operating temperature specification associated with a first data processing device that is receiving power from the first antenna; and

regulate charging power at the second antenna based on the operating temperature specification.

7. The device of claim 1, further comprising:

a second distal temperature sensor responsive to heat propagated from the first antenna, wherein the first antenna is between the second distal temperature sensor and the first distal temperature sensor; and

wherein the controller is further to regulate charging power at the first antenna and at the second antenna based on information provided by the second distal temperature sensor.

8. The device of claim 1, further comprising:

a third distal temperature sensor responsive to heat propagated from the second antenna, wherein the second antenna is between the third distal temperature sensor and the first distal temperature sensor; and

wherein the controller is further to regulate charging power at the first antenna and at the second antenna based on information provided by the third distal temperature sensor.

9. A method comprising:

receiving first thermal information from a first distal temperature sensor located between a first wireless power transmission antenna and a second wireless power transmission antenna;

regulating charging power provided at the first antenna and at the second antenna based on the first thermal information.

10. The method of claim 9, further comprising:

receiving second thermal information from a first proximal temperature sensor located at the first antenna; and

regulating charging power provided at the first antenna and at the second antenna further based on the second thermal information.

11. The method of claim 9, further comprising:

receiving third thermal information from a first remote temperature sensor located at a data processing device that is receiving power from the first antenna; and

regulating charging power provided at the first antenna further based on the third thermal information.

12. The method of claim 9, further comprising:

receiving third thermal information from a first remote temperature sensor located at a data processing device that is receiving power from the first antenna; and

regulating charging power provided at the second antenna further based on the third thermal information.

13. The method of claim 9, further comprising:

determining an operating temperature specification associated with a first data processing device that is receiving power from the first antenna; and

regulating charging power at the first antenna further based on the operating temperature specification.

14. The method of claim 9, further comprising:

determining an operating temperature specification associated with a first data processing device that is receiving power from the first antenna; and

regulating charging power at the second antenna further based on the operating temperature specification.

15. The method of claim 9, further comprising:

receiving second thermal information from a second distal temperature sensor responsive to heat propagated from the first antenna, wherein the first antenna is between the second distal temperature sensor and the first distal temperature sensor; and

regulating charging power at the first antenna and at the second antenna based on the second thermal information.

16. The method of claim 9, further comprising:

receiving third thermal information from a third distal temperature sensor responsive to heat propagated from the second antenna, wherein the second antenna is between the third distal temperature sensor and the first distal temperature sensor; and

regulating charging power at the first antenna and at the second antenna based on the third thermal information.

17. A wireless power charging system comprising:

a first and a second wireless power transmission antenna disposed at a wireless charging mat;

a first distal temperature sensor located between the first antenna and the second antenna, the first sensor responsive to heat propagated from the first antenna and responsive to heat propagated from the second antenna;

a second distal temperature sensor responsive to heat propagated from the first antenna and not substantially responsive to heat propagated from the second antenna, wherein the first antenna is between the second distal temperature sensor and the first distal temperature sensor; and

a controller to regulate power provided at the second antenna based on information provided by the first distal temperature sensor and by the second distal temperature sensor.

18. The system of claim 17, further comprising:

a third distal temperature sensor responsive to heat propagated from the second antenna and not substantially responsive to heat propagated from the first antenna, wherein the second antenna is between the third distal temperature sensor and the first distal temperature sensor; and

wherein the controller is further to regulate power provided at the first antenna based on information provided by the first distal temperature sensor and by the third distal temperature sensor.

19. The system of claim 17, wherein the controller is further to regulate charging power at the second antenna based on information provided by a first remote temperature sensor located at a data processing device that is receiving power from the first antenna.

20. The system of claim 17, wherein the controller is further to:

determine an operating temperature specification associated with a first data processing device that is receiving power from the first antenna; and

regulate charging power at the second antenna based on the operating temperature specification.