Method and device for controlling wireless charging

Patent metadata

Field	Value
Publication number	US-11201510-B2
Application number	US-201916384357-A
Country	US
Kind code	B2
Filing date	Apr 15, 2019
Priority date	Apr 11, 2018
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

A method and a device for controlling wireless charging are provided. The method includes: acquiring charging quality of a wireless charging receiver at a current position relative to a wireless charging transmitter; acquiring charging qualities of the wireless charging receiver respectively at the first and second preset positions; determining relative position information of the wireless charging receiver relative to the wireless charging transmitter, based on the charging qualities at the current position, and at the first and second preset positions; acquiring position correction information of the wireless charging receiver corresponding to the relative position information; and upon correction of a position of the wireless charging receiver based on the position correction information, charging the wireless charging receiver at the corrected position.

First claim

What is claimed is:

1. A method for controlling wireless charging, comprising:
acquiring a current charging quality of a wireless charging receiver at a current position relative to a wireless charging transmitter, the charging quality comprising charging efficiency, wherein the charging efficiency is determined based on a charging efficiency table using a preset rectangular coordinate system at the wireless charging transmitter;
acquiring a first charging quality of the wireless charging receiver at a first preset position relative to the wireless charging transmitter;
acquiring a second charging quality of the wireless charging receiver at a second preset position relative to the wireless charging transmitter;
determining relative position information of the wireless charging receiver relative to the wireless charging transmitter, based on the current charging quality at the current position, the first charging quality, and the second charging quality;
acquiring position correction information of the wireless charging receiver corresponding to the relative position information; and
upon correction of a position of the wireless charging receiver based on the position correction information, charging the wireless charging receiver at the corrected position.

2. The method according to claim 1 , wherein determining relative position information of the wireless charging receiver relative to the wireless charging transmitter, based on the current charging quality at the current position, the first charging quality and the second charging quality comprises:
determining a target quadrant of the wireless charging receiver in the preset rectangular coordinate system provided at the wireless charging transmitter, based on the current charging quality at the current position, the first charging quality and the second charging quality, an intersection of two axes of the preset rectangular coordinate system being a center of a charging coil in the wireless charging transmitter; and
determining the relative position information, based on the target quadrant.

3. The method according to claim 1 , wherein the position correction information comprises a preset moving direction and a preset movement distance, and upon correction of a position of the wireless charging receiver based on the position correction information, charging the wireless charging receiver at the corrected position comprises:
upon movement of the wireless charging receiver in accordance with the preset moving direction and the preset movement distance, charging the wireless charging receiver at a position after the movement.

4. The method according to claim 3 , wherein the preset moving direction comprises a first preset direction, the preset movement distance comprises a first preset distance, and upon movement of the wireless charging receiver in accordance with the preset moving direction and the preset movement distance, charging the wireless charging receiver at a position after the movement comprises:
outputting a first prompt message, the first prompt message prompting the wireless charging receiver to move by the first preset distance in the first preset direction;
upon movement of the wireless charging receiver by the first preset distance in the first preset direction to a third position relative to the wireless charging transmitter, acquiring charging quality of the wireless charging receiver at the third position;
in a case where the charging quality at the third position is lower than the second charging quality, outputting a second prompt message, the second prompt message prompting the wireless charging receiver to move by the first preset distance in a second preset direction, the second preset direction being opposite to the first preset direction; and
in a case where the charging quality at the third position is higher than the second charging quality, repeating the step of outputting the first prompt message and acquiring the charging quality, until the charging quality of the wireless charging receiver at the position after the movement by the first preset distance in the first preset direction is lower than the charging quality of the wireless charging receiver before the movement, and outputting the second prompt message.

5. The method according to claim 4 , wherein upon movement of the wireless charging receiver in accordance with the preset moving direction and the preset movement distance, charging the wireless charging receiver at a position after the movement further comprises:
upon movement of the wireless charging receiver by the first preset distance in the second preset direction, charging the wireless charging receiver at the position after the movement.

6. The method according to claim 4 , wherein the preset moving direction further comprises a third preset direction, the preset movement distance further comprises a second preset distance, and the method further comprises:
upon movement of the wireless charging receiver by the first preset distance in the second preset direction to a fourth position relative to the wireless charging transmitter, acquiring charging quality of the wireless charging receiver at the fourth position;
outputting a third prompt message, the third prompt message prompting the wireless charging receiver to move by the second preset distance in the third preset direction;
upon movement of the wireless charging receiver by the second preset distance in the third preset direction to a fifth position relative to the wireless charging transmitter, acquiring charging quality of the wireless charging receiver at the fifth position;
in a case where the charging quality at the fifth position is lower than the charging quality at the fourth position, outputting a fourth prompt message, the fourth prompt message prompting the wireless charging receiver to move by the second preset distance in a fourth preset direction, the fourth preset direction being opposite to the third preset direction; and
in a case where the charging quality at the fifth position is higher than the charging quality at the fourth position, repeating the step of outputting the third prompt message and acquiring the charging quality, until the charging quality of the wireless charging receiver at the position after the movement by the second preset distance in the third preset direction is lower than the charging quality of the wireless charging receiver before the movement, and outputting the fourth prompt message;
wherein charging the wireless charging receiver at a position after the movement comprises:
upon movement of the wireless charging receiver by the second preset distance in the fourth preset direction, charging the wireless charging receiver at the position after the movement.

7. A device for controlling wireless charging, comprising:
a processor; and
a memory for storing instructions executable by the processor, wherein the processor is configured to:
acquire a current charging quality of a wireless charging receiver at a current position relative to a wireless charging transmitter, the charging quality comprising charging efficiency, wherein the charging efficiency is determined based on a charging efficiency table using a preset rectangular coordinate system at the wireless charging transmitter;
acquire a first charging quality of the wireless charging receiver at a first preset position relative to the wireless charging transmitter;
acquire a second charging quality of the wireless charging receiver at a second preset position relative to the wireless charging transmitter;
determine relative position information of the wireless charging receiver relative to the wireless charging transmitter, based on the current charging quality at the current position, the first charg

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Wang Yanteng
• Li Zhijie
• Xu Chunli

Classifications

• H02J50/10 Primary

  using inductive coupling · CPC title

• H02J50/90 Primary

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

• H02J50/12

  of the resonant type · CPC title

• G06F9/3004

  to perform operations on memory · CPC title

• H02J50/80

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