Wireless charging device and charging system

Patent metadata

Field	Value
Publication number	US-11245292-B2
Application number	US-201916533456-A
Country	US
Kind code	B2
Filing date	Aug 6, 2019
Priority date	Nov 16, 2018
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

The present disclosure provides a wireless charging device including a transmitting coil, a power collection component, a position acquiring component, a driving component and a control component. The transmitting coil is configured to transmit electrical energy to a receiving coil of a terminal. The power collection component is configured to acquire state parameters of the transmitting coil and the receiving coil in a charging state in real time. The position acquisition component is configured to acquire position information of the receiving coil sent by the terminal and position information of the transmitting coil. The driving component is configured to drive the transmitting coil to move. The control component is configured to control the driving component to drive the transmitting coil to move according to the position information of the receiving coil, the position information of the transmitting coil, and the state parameter.

First claim

What is claimed is:

1. A wireless charging device, comprising:
a transmitting coil configured to transmit electrical energy to a receiving coil;
a power collection component configured to acquire a state parameter of the transmitting coil and the receiving coil in a charging state in real time;
a position acquisition component configured to acquire position information of the receiving coil and position information of the transmitting coil;
a driving component configured to drive the transmitting coil to move; and
a control component configured to control the driving component to drive the transmitting coil to move according to the position information of the receiving coil, the position information of the transmitting coil, and the state parameter until the state parameter is within a preset range, wherein the position acquisition component further comprises:
a storage module configured to store reference device information and position information corresponding to a respective reference piece of device information; and
a comparison module configured to receive device information, compare the device information with the reference device information, and read the position information of the receiving coil corresponding to the reference device information when one of the reference device information comprises the device information.

2. The wireless charging device of claim 1 , wherein the wireless charging device further comprises:
a detecting component configured to detect a marking component indicating a position of the receiving coil and generate a control signal when the marking component is detected; and
wherein the control component is configured to determine an offset direction of the transmitting coil relative to the receiving coil according to the position information of the receiving coil and the position information of the transmitting coil in response to the control signal.

3. The wireless charging device of claim 1 , wherein the comparison module is configured to acquire the position information of the receiving coil when the device information is not comprised in the reference device information, and store the device information in the storage module to serve as the reference device information corresponding to the position information of the receiving coil.

4. The wireless charging device of claim 2 , wherein the marking component is a light emitting element and the detecting component is a photodetecting element.

5. The wireless charging device of claim 1 , wherein the state parameter comprises a ratio of a power of the receiving coil to power of the transmitting coil.

6. The wireless charging device of claim 5 , wherein the preset range is 70% to 100%.

7. The wireless charging device of claim 1 , wherein controlling the driving component to drive the transmitting coil to move according to the position information of the receiving coil, the position information of the transmitting coil, and the state parameter until the state parameter is within the preset range comprises:
determining an offset direction of the transmitting coil relative to the receiving coil according to the position information of the receiving coil and the position information of the transmitting coil; and
controlling the driving component to drive the transmitting coil to move along an opposite direction of the offset direction until the state parameter is within the preset range.

8. The wireless charging device of claim 7 , wherein:
the position information of the receiving coil comprises first coordinate information of the receiving coil in a first preset coordinate system;
the position information of the transmitting coil comprises second coordinate information of the transmitting coil in a second preset coordinate system; and
determining the offset direction of the transmitting coil relative to the receiving coil according to the position information of the receiving coil and the position information of the transmitting coil comprises:
determining the offset direction of the transmitting coil relative to the receiving coil according to the first coordinate information, the second coordinate information, and a positional relationship between the first preset coordinate system and the second preset coordinate system direction.

9. The wireless charging device of claim 8 , wherein an origin of the first preset coordinate system is located at a center of the receiving coil, and an origin of the second preset coordinate system is located at the center of the transmitting coil.

10. A charging system, comprising:
a terminal comprising a receiving coil; and
a wireless charging device, the wireless charging device comprising:
a transmitting coil configured to transmit electrical energy to the receiving coil;
a power collection component configured to acquire a state parameter of the transmitting coil and the receiving coil in a charging state in real time;
a position acquisition component configured to acquire position information of the receiving coil sent by the terminal and position information of the transmitting coil;
a driving component configured to drive the transmitting coil to move; and
a control component configured to control the driving component to drive the transmitting coil to move according to the position information of the receiving coil, the position information of the transmitting coil, and the state parameter until the state parameter is within a preset range, wherein the position acquisition component further comprises:
a storage module configured to store reference device information of a plurality of terminals and position information of a receiving coil of each of the terminals; and
a comparison module, configured to receive device information sent by one of the plurality of terminals, compare the device information with the reference device information, and read position information of a receiving coil corresponding to the reference device information when one of the reference device information comprises the device information.

11. The charging system of claim 10 , wherein:
the terminal comprises a marking component; and
the wireless charging device further comprises:
a detecting component configured to detect the marking component and generate a control signal when the marking component is detected; and
wherein the control component is configured to determine an offset direction of the transmitting coil relative to the receiving coil according to the position information of the receiving coil and the position information of the transmitting coil in response to the control signal.

12. The charging system of claim 10 , wherein:
the comparison module is configured to acquire the position information of the receiving coil sent by the terminal when the device information is not comprised in the reference device information; and
store the device information in the storage module to serve as the reference device information corresponding to the terminal.

13. The charging system of claim 11 , wherein the marking component is a light emitting element and the detecting component is a photodetecting element.

14. The charging system of claim 10 , wherein the state parameter comprises a ratio of a power of the receiving coil to a power of the transmitting coil.

15. The charging system of claim 14 , wherein the preset range is 70% to 100%.

16. The charging system of claim 10 , wherein controlling the driving component to drive the transmitting coil to move according to the position information of the receiving coil, the position information of the transmitting coi

Assignees

• Boe Technology Group Co Ltd

Inventors

• Deng Wei
• Yang Jun
• Li Yanfu

Classifications

• H02J7/02

  for charging batteries from AC mains by converters · CPC title

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H02J7/025 Primary

  Electricity · mapped topic

• Y02B40/00

  Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers · CPC title

• H02J50/90 Primary

  involving detection or optimisation of position, e.g. alignment · CPC title