Bidirectional wireless charging device and bidirectional wireless charging system

• US 9,876,381 B2
• Filed: 03/30/2015
• Issued: 01/23/2018
• Est. Priority Date: 01/19/2015
• Status: Active Grant

• Current Assignee: Anpec Electronics Corporation
• Original Assignee: Anpec Electronics Corporation
• Inventors: Wang, Yuan-Hung, Chang, Che-Chang, Cheng, Chieh-Wen, Yang, Yung-Ning
• Primary Examiner(s): Tso, Edward
• Application Number:
  US14/672,373
• Publication Number:
  US 20160211694A1
• Time in Patent Office: 1,030 Days
• Field of Search: 320107, 320108, 307104, 307108
• CPC Class Codes: H02J 50/00 Circuit arrangements or systems for wireless supply or distribution of electric power
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

The present disclosure illustrates a bidirectional wireless charging device. The bidirectional wireless charging device comprises a transceiver chip which is configured to receive a switch signal. The transceiver chip comprises a power stage circuit and a control module. The power stage circuit is coupled to a coil, and the control module is coupled to the power stage circuit. The power stage circuit is configured to output a voltage to the coil, or to receive an induced voltage from the coil. The control module is configured to control the transceiver chip to enter a power mode or a charging mode based upon the switch signal. When the transceiver chip enters the power mode, the transceiver chip provides the voltage to the coil. When the transceiver chip enters the charging mode, the transceiver chip receives the induced voltage from the coil and charges a power storage unit.

Claims

1. A bidirectional wireless charging device, comprising:

a transceiver chip, receiving a switch signal, the transceiver chip comprising;

a power stage circuit, electrically connected to a coil, outputting a voltage to the coil or receiving an induced voltage from the coil;

a control module, electrically connected to the power stage circuit, correspondingly making the transceiver chip turn into a power mode or a charging mode according to the switch signal;

at least one power mode operation module, electrically connected to the coil and the control module; and

at least one charging mode operation module, electrically connected to the coil, the power stage circuit and the control module;

wherein when the switch signal indicates that the transceiver chip turns into the power mode, the control module connects the circuit path to the power mode operation module while disconnects the circuit path to the charging mode operation module and the transceiver chip provides the voltage to the coil;

wherein when the switch signal indicates that the transceiver chip turns into the charging mode, the control module connects the circuit path to the charging mode operation module while disconnects the circuit path to the power mode operation module and the transceiver chip receives the induced voltage from the coil and charges a power storage unit of the bidirectional wireless charging device.

2. The bidirectional wireless charging device according to claim 1, wherein the control module further comprises a switching unit correspondingly controlling the transceiver chip according to the switch signal.

3. The bidirectional wireless charging device according to claim 2, wherein the switching unit is a multiplexer or a MOSFET switch.

4. The bidirectional wireless charging device according to claim 1,

wherein when the transceiver chip turns into the power mode, a control unit of the control module makes the power stage circuit output the voltage to the coil, and the coil converts the received voltage into a pulse width modulated signal and sends out the pulse width modulated signal;

and

wherein the pulse width modulated signal includes an electromagnetic energy.

5. The bidirectional wireless charging device according to claim 4, wherein the power mode operation module comprises:

a demodulation unit, electrically connected to the coil and the control unit, configured to receive the pulse width modulated signal via the coil and to demodulate the pulse width modulated signal so as to obtain a status message, the status message comprising a current electric quantity of a charging end, an energy adjusting request, an energy maintaining request or a cut-off supply request;

wherein the demodulation unit demodulates the pulse width modulated signal to output the status message, and the control unit receives the status message and correspondingly controls the voltage output by the power stage circuit according to the status message.

6. The bidirectional wireless charging device according to claim 1, wherein when the transceiver chip turns into the charging mode, the coil receives a pulse width modulated signal and generates the induced voltage according to an electromagnetic energy of the pulse width modulated signal, the power stage circuit receives the induced voltage from the coil and generates a rectified voltage, and the power stage circuit outputs the power stage circuit to the charging mode operation module.

7. The bidirectional wireless charging device according to claim 6, wherein the charging mode operation module comprises:

a voltage regulating unit, electrically connected to the power stage circuit, the control module and a power processing unit, configured to regulate the rectified voltage and to generate a regulated voltage;

wherein the voltage regulating unit outputs the rectified voltage to the control module so as to provide an electrical energy for operating of the bidirectional wireless charging device, the voltage regulating unit outputs the regulated voltage to the power processing unit, and the power processing unit charges the power storage unit.

8. The bidirectional wireless charging device according to claim 7, wherein the charging mode operation module further comprises:

a modulation unit, electrically connected to the coil and a control unit of the control module, and controlled by the control unit to change an amplitude of voltage of the coil so as to generate a status of the pulse width modulated signal, wherein the status message comprises a current electric quantity of a charging end, an energy adjusting request, an energy maintaining request or a cut-off supply request;

wherein the control unit makes the modulation unit drive the coil to generate the pulse width modulated signal after the control unit receives the regulated voltage.

9. The bidirectional wireless charging device according to claim 1, wherein the transceiver chip comprises a plurality of coils, a plurality of power mode operation modules and a plurality of charging mode operation modules, each power mode operation is electrically connected to the control unit and one of the coils, and each charging mode operation module is electrically connected to the control unit, the power stage circuit and one of the coils, so as to provide the bidirectional wireless charging device with a multiple bidirectional wireless charging functions.

10. The bidirectional wireless charging device according to claim 1, wherein the bidirectional wireless charging device is a mobile phone, a tablet computer, a laptop, a wireless charger, a smart watch or a set top box.

11. A bidirectional wireless charging system, comprising:

a first bidirectional wireless charging device and a second bidirectional wireless charging device, the first bidirectional wireless charging device and the second bidirectional wireless charging device respectively comprises;

a transceiver chip, receiving a switch signal, the transceiver chip comprising;

a power stage circuit, electrically connected to a coil, outputting a voltage to the coil or receiving an induced voltage from the coil;

a control module, electrically connected to the power stage circuit, correspondingly making the transceiver chip turn into a power mode or a charging mode according to the switch signal;

at least one power mode operation module, electrically connected to the coil and the control module; and

at least one charging mode operation module, electrically connected to the coil, the power stage circuit and the control module;

wherein the first bidirectional wireless charging device and the second bidirectional wireless charging device are a charging end and a powering end according to the switch signal;

wherein when the first bidirectional wireless charging device is the powering end, the transceiver chip of the first bidirectional wireless charging device turns into the power mode, the control module connects the circuit path to the power mode operation module while disconnects the circuit path to the charging mode operation module, and the transceiver chip provides the voltage to the coil so as to make the first bidirectional wireless charging device provide a pulse width modulated signal to the second bidirectional wireless charging device, and the pulse width modulated signal includes an electromagnetic energy;

wherein when the second bidirectional wireless charging device is the charging end, the transceiver chip of the second bidirectional wireless charging device turns into the charging mode, the control module connects the circuit path to the charging mode operation module while disconnects the circuit path to the power mode operation module, the transceiver chip receives the induced voltage from the coil, and charges a power storage unit of the second bidirectional wireless charging device.

12. The bidirectional wireless charging system according to claim 11, wherein the first bidirectional wireless charging device and the second bidirectional wireless charging device respectively comprises a switching unit correspondingly controlling the transceiver chip according to the switch signal.

13. The bidirectional wireless charging system according to claim 12, wherein the switching is a multiplexer or a MOSFET switch.

14. The bidirectional wireless charging system according to claim 11,

wherein when the transceiver chip turns into the power mode a control unit of the control module makes the power stage circuit output the voltage to the coil, and the coil convers the received voltage into the pulse width modulated signal and sends out the pulse width modulated signal.

15. The bidirectional wireless charging system according to claim 14, wherein the power mode operation modules of the first bidirectional wireless charging device and the second bidirectional wireless charging device respectively comprise:

a demodulation unit, electrically connected to the coil and the control unit, configured to receive the pulse width modulated signal via the coil and to demodulate the pulse width modulated signal so as to obtain a status message, the status message comprising a currently stored electric quantity of a charging end, an energy adjusting request, an energy maintaining request or a cut-off supply request;

wherein the demodulation unit demodulates the pulse width modulated signal to output the status message, and the control unit receives the status message and correspondingly controls the voltage output by the power stage circuit according to the status message.

16. The bidirectional wireless charging system according to claim 11, wherein when the transceiver chip turns into the charging mode, the coil receives a pulse width modulated signal and generates the induced voltage according to the electromagnetic energy of the pulse width modulated signal, the power stage circuit receives the induced voltage from the coil and generates a rectified voltage, and the power stage circuit outputs the power stage circuit to the charging mode operation module.

17. The bidirectional wireless charging system according to claim 16, wherein the charging mode operation modules of the first bidirectional wireless charging device and the second bidirectional wireless charging device respectively comprise:

a voltage regulating unit, electrically connected to the power stage circuit, the control module and a power processing unit, configured to regulate the rectified voltage and to generate a regulated voltage;

wherein the voltage regulating unit outputs the rectified voltage to the control module so as to provide an electrical energy for operation of the control module, the voltage regulating unit outputs the regulated voltage to the power processing unit, and the power processing unit charges the power storage unit.

18. The bidirectional wireless charging system according to claim 17, wherein the charging mode operation modules of the first bidirectional wireless charging device and the second bidirectional wireless charging device respectively comprise:

a modulation unit, electrically connected to the coil and a control unit of the control module, and controlled by the control unit to change an amplitude of voltage of the coil so as to generate a status of the pulse width modulated signal, wherein the status message comprises a currently stored electric quantity of the power storage unit, an energy adjusting request, an energy maintaining request or a cut-off supply request;

wherein the control unit makes the modulation unit drive the coil to generate the pulse width modulated signal after the control unit receives the regulated voltage.

19. The bidirectional wireless charging system according to claim 11, wherein the first bidirectional wireless charging device and the second bidirectional wireless charging device are a mobile phone, a tablet computer, a laptop, a wireless charger, a smart watch or a set top box.

20. The bidirectional wireless charging system according to claim 11, wherein when a distance between the first bidirectional wireless charging device and the second bidirectional wireless charging device is smaller than a predetermined value, the first bidirectional wireless charging device and the second bidirectional wireless charging device exchange a status message with each other, wherein the status messages respectively comprise a currently stored electrical quantity of the first bidirectional wireless charging device and the second bidirectional wireless charging device.

21. The bidirectional wireless charging system according to claim 20, wherein when the currently stored electrical quantity of the first bidirectional wireless charging device is more than a first threshold value and when the currently stored electrical quantity of the second bidirectional wireless charging device is less than a second threshold value, the first bidirectional wireless charging device charges the second bidirectional wireless charging device.

22. The bidirectional wireless charging system according to claim 11, wherein the first bidirectional wireless charging device periodically sends the switch signal, the second bidirectional wireless charging device receives the switch signal and turns into the charging mode according to the switch signal, the second bidirectional wireless charging device replies the switch signal, and the first bidirectional wireless charging device turns into the power mode and starts to charge the second bidirectional wireless charging device after the first bidirectional wireless charging device receives a reply of the second bidirectional wireless charging device.