WIRELESS CHARGING SYSTEM AND CONTROL METHOD THEREOF

• US 20190058363A1
• Filed: 03/07/2018
• Published: 02/21/2019
• Est. Priority Date: 08/21/2017
• Status: Abandoned Application

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: HAN, Litong
• Application Number:
  US15/914,132
• Publication Number:
  US 20190058363A1
• Time in Patent Office: Days
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/007192 in response to temperature
• 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

Abstract

A wireless charging system includes: a charging device, including a plurality of wireless charging transmitters configured to transmit energy; and a terminal device, including a plurality of wireless charging receivers configured to receive the energy, and a control circuit; the plurality of wireless charging receivers being provided at different positions of the terminal device and respectively facing the plurality of wireless charging transmitters, the control circuit being configured to control the wireless charging receiver to receive energy from the wireless charging transmitter, wherein the wireless charging receiver includes a temperature sensor and a switch controller, the control circuit being connected to both the temperature sensor and the switch controller.

Claims

1. A wireless charging system, comprising:

a charging device, comprising a plurality of wireless charging transmitters configured to transmit energy; and

a terminal device, comprising a plurality of wireless charging receivers configured to receive the energy, and a control circuit;

the plurality of wireless charging receivers being provided at different positions of the terminal device and respectively facing the plurality of wireless charging transmitters, the control circuit being configured to control the wireless charging receiver to receive energy from the wireless charging transmitter,

wherein the wireless charging receiver comprises a temperature sensor and a switch controller, the control circuit is connected to both the temperature sensor and the switch controller.

2. The wireless charging system according to claim 1, wherein the plurality of wireless charging receivers are respectively provided on a bezel and/or a back plate of the terminal device.

3. The wireless charging system according to claim 1, wherein the plurality of wireless charging receivers comprise a first group of wireless charging receivers and a second group of wireless charging receivers that operate alternately.

4. The wireless charging system according to claim 3, wherein the first group of wireless charging receivers is provided on the bezel and the wireless charging receivers in the first group are spaced apart from one another, and the second group of wireless charging receivers is provided on the back plate and the wireless charging receivers in the second group are spaced apart from one another,

wherein a position where the wireless charging receivers provided on the bezel is orthographically projected on the back plate alternates with a position where the wireless charging receivers provided on back plate is orthographically projected on the back.

5. The wireless charging system according to claim 3, wherein the plurality of wireless charging transmitters and the plurality of wireless charging receivers are in one-to-one correspondence.

6. The wireless charging system according to claim 3, wherein each of the wireless charging transmitters corresponds to one of the first group of wireless charging receivers and one of the second group of wireless charging receivers, and two wireless charging receivers corresponding to the same wireless charging transmitter are adjacent to each other.

7. The wireless charging system according to claim 3, wherein the terminal device further comprises:

a plurality of capacitors, wherein each of the wireless charging receivers is connected in parallel with one of the capacitors,

wherein the capacitor is configured such that its capacitance maintains quantity of electric charge required for switching between the first group of wireless charging receivers and the second group of wireless charging receivers.

8. The wireless charging system according to claim 1, wherein the control circuit comprises:

a receiver, configured to receive a temperature detected by the temperature sensor; and

a first control circuit, configured to control the corresponding switch controller to adjust an operating state of the wireless charging receiver according to the received temperature.

9. The wireless charging system according to claim 8, wherein the control circuit further comprises:

a storage, configured to store the received temperature data of each of the wireless charging receivers;

an analyzer, configured to analyze a temperature change trend of each of the wireless charging receivers according to the temperature data to obtain heat dissipation data; and

a second control circuit, configured to dynamically adjust an operating amount of the wireless charging receivers at different positions or a transmitting power of the wireless charging transmitters corresponding to the wireless charging receivers according to the heat dissipation data.

10. The wireless charging system according to claim 1, wherein each of the charging device and the terminal device comprises:

a wireless information transceiver unit, configured to, when a temperature of any of the wireless charging receivers exceeds a threshold temperature, transmit a wireless signal for turning off the corresponding wireless charging transmitter.

11. The wireless charging system according to claim 2, wherein each of the charging device and the terminal device comprises:

a wireless information transceiver unit, configured to, when a temperature of any of the wireless charging receivers exceeds a threshold temperature, transmit a wireless signal for turning off the corresponding wireless charging transmitter.

12. The wireless charging system according to claim 3, wherein each of the charging device and the terminal device comprises:

a wireless information transceiver unit, configured to, when a temperature of any of the wireless charging receivers exceeds a threshold temperature, transmit a wireless signal for turning off the corresponding wireless charging transmitter.

13. The wireless charging system according to claim 1, wherein the terminal device further comprises an energy storage element,

wherein the energy storage element comprises a plurality of batteries connected in parallel, and each of the batteries correspondingly receives an electric power output by one of the wireless charging receivers.

14. The wireless charging system according to claim 1, wherein the terminal device further comprises an energy storage element,

wherein the energy storage element comprises a plurality of batteries connected in series, and all the batteries simultaneously receive an electric power output by the plurality of wireless charging receivers.

15. The wireless charging system according to claim 2, wherein the terminal device further comprises an energy storage element,

wherein the energy storage element comprises a plurality of batteries connected in parallel, and each of the batteries correspondingly receives an electric power output by one of the wireless charging receivers.

16. A method for controlling a wireless charging system, for controlling the wireless charging system according to claim 1, wherein the control method comprises:

a plurality of wireless charging transmitters of a charging device transmitting energy to a terminal device; and

a control circuit of the terminal device controlling the plurality of wireless charging receivers of the terminal device to receive the energy, and the plurality of wireless charging receivers respectively facing the plurality of wireless charging transmitters at different positions,

wherein the control circuit is connected to both a temperature sensor and a switch controller in the wireless charging receiver.

17. The method for controlling a wireless charging system according to claim 16, wherein the step of the control circuit of the terminal device controlling the plurality of wireless charging receivers of the terminal device to receive the energy comprises:

dividing the plurality of wireless charging receivers into a first group of wireless charging receivers and a second group of wireless charging receivers;

the control circuit setting the first group of wireless charging receivers to an operating state and setting the second group of wireless charging receivers to a non-operating state;

the wireless charging transmitter driving the first group of wireless charging receivers to receive energy input with a maximum power; and

when a temperature of the first group of wireless charging receivers reaches a threshold temperature, the control circuit switching the first group of wireless charging receivers to the non-operating state and simultaneously switching the second group of wireless charging receivers to the operating state.

18. The method for controlling a wireless charging system according to claim 17, further comprising:

each of the wireless charging receivers being connected in parallel with a capacitor, when an operating state of one of the wireless charging receivers is switched, the capacitor releasing its quantity of electric charge to maintain a stable operation of the terminal device, until a next group of the wireless charging receivers is in the operating state.

19. The method for controlling a wireless charging system according to claim 16, further comprising:

the control circuit receiving temperature data of each of the wireless charging receivers from the temperature sensor;

analyzing a temperature change trend of each of the wireless charging receivers according to the temperature data to obtain heat dissipation data; and

dynamically adjusting an operating amount of the wireless charging receivers at different positions or dynamically adjusting transmitting power of the wireless charging transmitters corresponding to the wireless charging receivers according to the heat dissipation data.

20. The method for controlling a wireless charging system according to claim 16, further comprising:

when a temperature of any of the wireless charging receivers exceeds a threshold temperature, transmitting a wireless signal for turning off the corresponding wireless charging transmitter to a wireless information transceiver unit provided on the charging device through a wireless information transceiver unit provided on the terminal device.