Wireless charging device and method

• US 9,893,558 B2
• Filed: 09/12/2013
• Issued: 02/13/2018
• Est. Priority Date: 07/24/2013
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Gu, Yunfeng
• Primary Examiner(s): Whitmore, Stacy
• Application Number:
  US14/906,270
• Publication Number:
  US 20160164334A1
• Time in Patent Office: 1,615 Days
• Field of Search: 320107-108
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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

Abstract

Disclosed are a wireless charging apparatus and method, wherein the device includes: a receiving coil, connected to a dynamic matching circuit, and the dynamic matching circuit includes a control circuit and at least one kind of matching circuit; the control circuit is connected to the at least one kind of matching circuit; the control circuit is configured to: transmit a control signal for controlling ON and OFF of the at least one kind of matching circuit. The apparatus and method solve the problem of using different wireless charging standards to perform wireless charging and realize a flexible wireless charging mechanism.

Claims

1. A wireless charging apparatus, comprising a receiving coil, wherein the receiving coil is connected to a dynamic matching circuit, and the dynamic matching circuit comprises a control circuit and at least one kind of matching circuit;

the control circuit is connected to the at least one kind of matching circuit;

the control circuit is configured to;

transmit a control signal for controlling ON and OFF of the at least one kind of matching circuit,

wherein the apparatus further comprises a wireless charging receiving circuit;

the wireless charging receiving circuit is configured to judge a wireless charging standard corresponding to received handshake information, and determine the type of a required matching circuit;

the wireless charging receiving circuit is configured to generate the control signal according to the handshake information, and indicate a matching circuit selected by the control circuit in the control signal.

2. The wireless charging apparatus of claim 1, wherein, the matching circuit comprises following types:

wireless power consortium (WPC) matching circuit and power matters alliance (PMA) matching circuit.

3. A wireless charging method applying the wireless charging apparatus of claim 2, comprising:

a wireless charging receiving circuit sending the control signal to the dynamic matching circuit to instruct the dynamic matching circuit to select a corresponding matching circuit from at least one kind of matching circuit to be connected;

the dynamic matching circuit switching and connecting to a corresponding circuit in accordance with the control signal and starting to charge.

4. The wireless charging method of claim 3, wherein before the step of the wireless charging receiving circuit sending the control signal to the dynamic matching circuit, the method further comprises:

the receiving coil sending the received handshake information to the wireless charging receiving circuit via the dynamic matching circuit;

the wireless charging receiving circuit generating the control signal according to the handshake information.

5. The wireless charging method of claim 4, wherein when the receiving coil sends the received handshake information to the wireless charging receiving circuit via the dynamic matching circuit, the dynamic matching circuit represents high and low levels of a digital signal by changes of transmission frequency, and uses the digital signal to carry the handshake information.

6. The wireless charging apparatus of claim 1, wherein

the wireless charging receiving circuit is configured to:

connect to a control circuit of the dynamic matching circuit through a control line;

the wireless charging receiving circuit is configured to;

send the control signal to the dynamic matching circuit through the control line to control the dynamic matching circuit selecting one matching circuit from the at least one kind of matching circuit to be connected.

7. A wireless charging method applying the wireless charging apparatus of claim 6, comprising:

a wireless charging receiving circuit sending the control signal to the dynamic matching circuit to instruct the dynamic matching circuit to select a corresponding matching circuit from at least one kind of matching circuit to be connected;

the dynamic matching circuit switching and connecting to a corresponding circuit in accordance with the control signal and starting to charge.

8. The wireless charging method of claim 7, wherein before the step of the wireless charging receiving circuit sending the control signal to the dynamic matching circuit, the method further comprises:

the receiving coil sending the received handshake information to the wireless charging receiving circuit via the dynamic matching circuit;

the wireless charging receiving circuit generating the control signal according to the handshake information.

9. The wireless charging method of claim 8, wherein when the receiving coil sends the received handshake information to the wireless charging receiving circuit via the dynamic matching circuit, the dynamic matching circuit represents high and low levels of a digital signal by changes of transmission frequency, and uses the digital signal to carry the handshake information.

10. The wireless charging apparatus of claim 1, wherein the control circuit is configured as a switch switching between the at least one kind of matching circuit, and when the switch switches to one matching circuit, the matching circuit is connected.

11. A wireless charging method applying the wireless charging apparatus of claim 10, comprising:

a wireless charging receiving circuit sending the control signal to the dynamic matching circuit to instruct the dynamic matching circuit to select a corresponding matching circuit from at least one kind of matching circuit to be connected;

the dynamic matching circuit switching and connecting to a corresponding circuit in accordance with the control signal and starting to charge.

12. The wireless charging apparatus of claim 1, wherein the control circuit is a variable capacitor.

13. A wireless charging method applying the wireless charging apparatus of claim 12, comprising:

a wireless charging receiving circuit sending the control signal to the dynamic matching circuit to instruct the dynamic matching circuit to select a corresponding matching circuit from at least one kind of matching circuit to be connected;

the dynamic matching circuit switching and connecting to a corresponding circuit in accordance with the control signal and starting to charge.

14. The wireless charging apparatus of claim 1, wherein the dynamic matching circuit comprises at least two kinds of matching circuits.

15. A wireless charging method applying the wireless charging apparatus of claim 14, comprising:

a wireless charging receiving circuit sending the control signal to the dynamic matching circuit to instruct the dynamic matching circuit to select a corresponding matching circuit from at least one kind of matching circuit to be connected;

the dynamic matching circuit switching and connecting to a corresponding circuit in accordance with the control signal and starting to charge.

16. A wireless charging method applying the wireless charging apparatus of claim 1, comprising:

a wireless charging receiving circuit sending a control signal to the dynamic matching circuit to instruct the dynamic matching circuit to select a corresponding matching circuit from at least one kind of matching circuit to be connected;

the dynamic matching circuit switching and connecting to a corresponding circuit in accordance with the control signal and starting to charge,

the wireless charging receiving circuit judging a wireless charging standard corresponding to received handshake information, and determining the type of a required matching circuit;

the wireless charging receiving circuit generating the control signal according to the handshake information, and indicating a matching circuit selected by the control circuit in the control signal.

17. The wireless charging method of claim 16, wherein before the step of the wireless charging receiving circuit sending the control signal to the dynamic matching circuit, the method further comprises:

the receiving coil sending the received handshake information to the wireless charging receiving circuit via the dynamic matching circuit.

18. The wireless charging method of claim 17, wherein when the receiving coil sends the received handshake information to the wireless charging receiving circuit via the dynamic matching circuit, the dynamic matching circuit represents high and low levels of a digital signal by changes of transmission frequency, and uses the digital signal to carry the handshake information.