Wireless charging method, electronic device and mobile terminal

Patent metadata

Field	Value
Publication number	US-2022278564-A1
Application number	US-202117465639-A
Country	US
Kind code	A1
Filing date	Sep 2, 2021
Priority date	Feb 26, 2021
Publication date	Sep 1, 2022
Grant date	—

Abstract

A wireless charging method includes: acquiring identification information of a charging device, wherein the identification information is configured to indicate a position state between the mobile terminal and the charging device; when the identification information meets a preset charging condition, controlling an electromagnet body in the mobile terminal to be powered on to attract the charging device; and when the identification information does not meet the preset charging condition, controlling the electromagnet body in the mobile terminal to be powered off. The mobile terminal powers on the electromagnet body when charging, to make it be in a magnetic state; and after the charging is completed, powers off it to make it be in a non-magnetic state.

First claim

What is claimed is:

1 . A wireless charging method, comprising:
acquiring, by a mobile terminal, identification information of a charging device, wherein the identification information is configured to indicate a position state between the mobile terminal and the charging device; in response to determining that the identification information meets a preset charging condition, controlling an electromagnet body in the mobile terminal to be powered on, such that the mobile terminal is attracted to the charging device; and in response to determining that the identification information does not meet the preset charging condition, controlling the electromagnet body in the mobile terminal to be powered off.

2 . The method according to claim 1 , wherein the identification information comprises: a near field communication signal between the mobile terminal and the charging device; and
when the near field communication signal indicates that the mobile terminal and the charging device are matched, the identification information meets the preset charging condition.

3 . The method according to claim 1 , wherein the identification information comprises: a charging current of the mobile terminal or the charging device; and
when the charging current is greater than or equal to a preset current threshold, the identification information meets the preset charging condition.

4 . The method according to claim 1 , wherein the identification information comprises: a distance between the mobile terminal and the charging device, wherein the distance is sensed by a Hall sensor in the mobile terminal and a Hall sensor in the charging device; and
when the distance is less than or equal to a preset distance threshold, the identification information meets the preset charging condition.

5 . A mobile terminal, comprising:
a processor; and a memory for storing instructions executable by the processor, wherein the processor is configured to: acquire identification information of a charging device, wherein the identification information is configured to indicate a position state between the mobile terminal and the charging device; determine whether the identification information meets a preset charging condition; and power on or off an electromagnet body according to a determining result of the determining module.

6 . A mobile terminal, comprising:
a first electromagnet body, configured to match a second magnet body in a charging device, such that the mobile terminal is attracted to the charging device; a first wireless charging coil, configured to match a second wireless charging coil in the charging device, such that electric energy is transmitted between the mobile terminal and the charging device; and a controller, configured to be electrically connected to the first electromagnet body, to control the first electromagnet body to be powered on or off.

7 . The mobile terminal according to claim 6 , further comprising:
a plurality of first electromagnet bodies, wherein the plurality of first electromagnet bodies are disposed around the first wireless charging coil.

8 . The mobile terminal according to claim 6 , further comprising:
a first near field communication antenna being electrically connected to the controller, wherein the first near field communication antenna is configured to match a second near field communication antenna of the charging device, to determine a near field communication signal between the mobile terminal and the charging device.

9 . The mobile terminal according to claim 8 , wherein the first near field communication antenna is disposed around the first wireless charging coil.

10 . The mobile terminal according to claim 6 , further comprising:
a first Hall sensor being electrically connected to the controller, wherein the first Hall sensor is configured to match a second Hall sensor of the charging device, to determine a distance between the mobile terminal and the charging device.

11 . The mobile terminal of claim 10 , wherein the first Hall sensor is disposed around the first wireless charging coil.

12 . The mobile terminal according to claim 6 , further comprising:
a back cover, wherein both the first electromagnet body and the first wireless charging coil are disposed on an inner surface of the back cover.

13 . The mobile terminal according to claim 7 , wherein the mobile terminal has a back cover, wherein both the first electromagnet body and the first wireless charging coil are provided on an inner surface of the back cover.

14 . The mobile terminal according to claim 8 , wherein the mobile terminal has a back cover, wherein both the first electromagnet body and the first wireless charging coil are provided on an inner surface of the back cover.

15 . The mobile terminal according to claim 9 , wherein the mobile terminal has a back cover, wherein both the first electromagnet body and the first wireless charging coil are provided on an inner surface of the back cover.

16 . The mobile terminal according to claim 10 , wherein the mobile terminal has a back cover, wherein both the first electromagnet body and the first wireless charging coil are provided on an inner surface of the back cover.

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Du Hui
• Ding Rui
• Chen Shan

Classifications

• H02J2105/44

  Portable electronic devices · CPC title

• H02J7/42 Primary

  with electronic devices having internal batteries, e.g. mobile phones · CPC title

• H02J50/80

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

• H02J50/90 Primary

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

• H02J50/10

  using inductive coupling · CPC title