Wireless power charging system

• US 10,651,671 B2
• Filed: 05/15/2017
• Issued: 05/12/2020
• Est. Priority Date: 11/30/2007
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Jung, Chun-Kil
• Primary Examiner(s): Berhanu, Samuel
• Application Number:
  US15/595,410
• Publication Number:
  US 20170250576A1
• Time in Patent Office: 1,093 Days
• Field of Search: 320108
• CPC Class Codes: H02J 50/12 of the resonant type
• 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 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H02J 7/0045 concerning the insertion or the connection of the batteries
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

A wireless power charging system has a wireless power transmission apparatus formed to charge a plurality of wireless power receiving apparatuses located in a short distance therefrom, wherein the total charging time for the wireless power receiving apparatuses is saved. The wireless power transmission apparatus has a main control unit and a resonant converter unit, which transmit the electric signal to the wireless power receiving apparatus via the resonance signal generated from a primary charge core in order to change the wireless power receiving apparatuses. The wireless power transmission apparatus also includes an output signal conversion module for transmitting a converted electric signal to the resonant converter unit and a received signal process module for processing a signal transmitted form the wireless power receiving apparatus.

Claims

1. A wireless charging apparatus, comprising:

a converter unit to convert a power signal to a resonant power signal and to transmit the resonant power signal to a plurality of power receiving devices via a transmitting core; and

a controller configured to;

provide a different code to each of the power receiving devices, wherein each different code indicates a different device identification of each of the power receiving devices for communication between the wireless charging apparatus and each of the power receiving devices;

communicate with each of the power receiving devices to receive charge status information from each of the power receiving devices using the different code; and

control the converter unit to transmit the resonant power signal based on the charge status information.

2. The wireless charging apparatus of claim 1, wherein during a standby mode, the controller controls the converter unit to transmit a signal at a predetermined period to detect presence of an object.

3. The wireless charging apparatus of claim 1, wherein the different code is to be sent to each of the power receiving devices via the transmitting core.

4. The wireless charging apparatus of claim 1, wherein the controller is configured to determine that each the power receiving devices is capable of receiving power wirelessly based on information received from each of the power receiving devices.

5. The wireless charging apparatus of claim 1, wherein the controller is configured to control the converter unit to stop transmitting the resonant power signal and return to standby mode if none of the power receiving devices are available for charging.

6. The wireless charging apparatus of claim 1, wherein the controller is configured to control the converter unit to stop transmitting the resonant power signal and operate in standby mode if none of the power receiving devices are available for charging.

7. The wireless charging apparatus of claim 1, wherein the controller is configured to receive a unique identifier from each the power receiving devices, wherein the unique identifier is used to identify each the power receiving devices as capable of receiving wireless power.

8. The wireless charging apparatus of claim 7, wherein the different code is generated by modifying the unique identifier.

9. The wireless charging apparatus of claim 7, wherein the controller is configured to determine whether each of the power receiving devices is available for charging based on the charge status information received from each of the power receiving devices.

10. A method of operating a wireless charging apparatus, comprising:

providing identification codes to a plurality of power receiving devices, wherein each identification code indicates a device identification of each of the power receiving devices for communication between the wireless charging apparatus and each of the power receiving devices;

communicating with each of the power receiving devices to receive charge status information from each of the power receiving devices using the identification code; and

converting a power signal to a resonant power signal and transmitting the resonant power signal to the plurality of power receiving devices via a transmitting core based on the charge status information.

11. The method of claim 10, comprising transmitting a signal at a predetermined period during a standby mode to detect presence of an object.

12. The method of claim 10, comprising sending the identification code to each of the power receiving devices via the transmitting core.

13. The method of claim 10, comprising determining that each the power receiving devices is capable of receiving power wirelessly based on information received from each of the power receiving devices.

14. The method of claim 10, comprising stopping transmission of the resonant power signal and returning to standby mode if none of the power receiving devices are available for charging.

15. The method of claim 10, comprising stopping transmission of the resonant power signal and operating in standby mode if none of the power receiving devices are available for charging.

16. The method of claim 10, comprising receiving a unique identifier from each the power receiving devices, wherein the unique identifier is used to identify each the power receiving devices as capable of receiving wireless power.

17. The method of claim 16, comprising generating the identification code by modifying the unique identifier.

18. The method of claim 16, comprising determining whether each of the power receiving devices is available for charging based on the charge status information received from each of the power receiving devices.

19. A non-transitory computer-readable medium comprising instructions that, when executed by a processor, direct the processor to:

provide codes to a plurality of power receiving devices, wherein each code indicates a different device identification of each of the power receiving devices for communication with each of the power receiving devices;

communicate with each of the power receiving devices to receive charge status information from each of the power receiving devices using the code; and

control a converter unit to convert a power signal to a resonant power signal and transmit the resonant power signal to the plurality of power receiving devices via a transmitting core based on the charge status information.

20. The computer-readable medium of claim 19, comprising instructions to control a converter unit to transmit a signal at a predetermined period to detect presence of an object during a standby mode.

21. The computer-readable medium of claim 19, wherein the code is to be sent to each of the power receiving devices via the transmitting core.

22. The computer-readable medium of claim 19, comprising instructions to determine that each the power receiving devices is capable of receiving power wirelessly based on information received from each of the power receiving devices.

23. The computer-readable medium of claim 19, comprising instructions to control the converter unit to stop transmitting the resonant power signal and return to standby mode if none of the power receiving devices are available for charging.

24. The computer-readable medium of claim 19, comprising instructions to control the converter unit to stop transmitting the resonant power signal and operate in standby mode if none of the power receiving devices are available for charging.

25. The computer-readable medium of claim 19, comprising instructions to receive a unique identifier from each the power receiving devices, wherein the unique identifier is used to identify each the power receiving devices as capable of receiving wireless power.

26. The computer-readable medium of claim 25, wherein the code is generated by modifying the unique identifier.

27. The computer-readable medium of claim 25, comprising instructions to determine whether each of the power receiving devices is available for charging based on the charge status information received from each of the power receiving devices.

28. A wireless charging system, comprising:

a plurality of power receiving devices; and

a wireless charging apparatus to charge the plurality of power receiving devices using a resonant power signal, wherein the wireless charging apparatus comprises;

a converter unit to convert a power signal to the resonant power signal and to transmit the resonant power signal to the plurality of power receiving devices via a transmitting core; and

a controller configured to;

provide a different code to each of the power receiving devices, wherein each different code indicates a different device identification of each of the power receiving devices for communication between the wireless charging apparatus and each of the power receiving devices;

communicate with each of the power receiving devices to receive charge status information from each of the power receiving devices using the different code; and

control the converter unit to transmit the resonant power signal based on the charge status information.

29. The wireless charging system of claim 28, wherein during a standby mode, the controller controls the converter unit to transmit a signal at a predetermined period to detect presence of an object.

30. The wireless charging system of claim 28, wherein the different code is to be sent to each of the power receiving devices via the transmitting core.

31. The wireless charging system of claim 28, wherein the controller is configured to determine that each the power receiving devices is capable of receiving power wirelessly based on information received from each of the power receiving devices.

32. The wireless charging system of claim 28, wherein the controller is configured to control the converter unit to stop transmitting the resonant power signal and return to standby mode if none of the power receiving devices are available for charging.

33. The wireless charging system of claim 28, wherein the controller is configured to control the converter unit to stop transmitting the resonant power signal and operate in standby mode if none of the power receiving devices are available for charging.

34. The wireless charging system of claim 28, wherein the controller is configured to receive a unique identifier from each the power receiving devices, wherein the unique identifier is used to identify each the power receiving devices as capable of receiving wireless power.

35. The wireless charging system of claim 34, wherein the different code is generated by modifying the unique identifier.

36. The wireless charging system of claim 34, wherein the controller is configured to determine whether each of the power receiving devices is available for charging based on the charge status information received from each of the power receiving devices.

37. A power transmission device, comprising:

a device case;

a converter unit housed within the device case and configured to convert a power signal to a resonant power signal and to transmit the resonant power signal to a plurality of power receiving devices via a transmitting core; and

a controller housed within the device case and configured to;

provide a different code to each of the power receiving devices, wherein each different code indicates a different device identification of each of the power receiving devices for communication between the power transmission device and each of the power receiving devices;

communicate with each of the power receiving devices to receive charge status information from each of the power receiving devices using the different code; and

control the converter unit to transmit the resonant power signal based on the charge status information.

38. The power transmission device of claim 37, wherein during a standby mode, the controller controls the converter unit to transmit a signal at a predetermined period to detect presence of an object.

39. The power transmission device of claim 37, wherein the different code is to be sent to each of the power receiving devices via the transmitting core.

40. The power transmission device of claim 37, wherein the controller is configured to determine that each the power receiving devices is capable of receiving power wirelessly based on information received from each of the power receiving devices.

41. The power transmission device of claim 37, wherein the controller is configured to control the converter unit to stop transmitting the resonant power signal and return to standby mode if none of the power receiving devices are available for charging.

42. The power transmission device of claim 37, wherein the controller is configured to control the converter unit to stop transmitting the resonant power signal and operate in standby mode if none of the power receiving devices are available for charging.

43. The power transmission device of claim 37, wherein the controller is configured to receive a unique identifier from each the power receiving devices, wherein the unique identifier is used to identify each the power receiving devices as capable of receiving wireless power.

44. The power transmission device of claim 43, wherein the different code is generated by modifying the unique identifier.

45. The power transmission device of claim 43, wherein the controller is configured to determine whether each of the power receiving devices is available for charging based on the charge status information received from each of the power receiving devices.