Method for wireless charging, transmitter, receiver and power management apparatus

Patent metadata

Field	Value
Publication number	US-10992189-B2
Application number	US-201816113348-A
Country	US
Kind code	B2
Filing date	Aug 27, 2018
Priority date	Aug 29, 2017
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

A method, a transmitter, a receiver, and a power management apparatus are provided for wireless charging. The method may include: acquiring, in response to an establishment of a connection from the wireless charging transmitter to a charger, voltage and current capability information of the charger; determining, in response to fast wireless charge identification information received from a wireless charging receiver, acknowledgment information corresponding to the fast wireless charge identification information according to the voltage and current capability information of the charger; sending the acknowledgment information to the wireless charging receiver; and requesting, in response to a charging request including desired voltage information and desired current information received from the wireless charging receiver, the charger for a voltage and a current corresponding to the desired voltage information and the desired current information, respectively.

First claim

What is claimed is:

1. A method for wireless charging, the method being applied to a wireless charging transmitter, comprising:
when detecting that a connection is established between the wireless charging transmitter and a charger, acquiring, by the wireless charging transmitter, voltage and current capability information of the charger;
when receiving fast wireless charge identification information from a wireless charging receiver, determining acknowledgment information corresponding to the fast wireless charge identification information according to the voltage and current capability information of the charger;
sending, by the wireless charging transmitter, the acknowledgment information to the wireless charging receiver; and
when receiving a charging request including desired voltage information and desired current information from the wireless charging receiver, requesting the charger to output a voltage and a current respectively corresponding to the desired voltage information and the desired current information.

2. The method according to claim 1 , wherein determining the acknowledgment information corresponding to the fast wireless charge identification information according to the voltage and current capability information of the charger comprising:
demodulating, in response to fast wireless charge identification information received from the wireless charging receiver, the fast wireless charge identification information;
determining, when the fast wireless charge identification information is correctly demodulated and the charger satisfies a requirement of fast wireless charging according to the voltage and current capability information of the charger, the acknowledgment information corresponding to the fast wireless charge identification information as fast wireless charge acknowledgment information; and
determining, when the fast wireless charge identification information is correctly demodulated and the charger does not satisfy the requirement of fast wireless charging according to the voltage and current capability information of the charger, the acknowledgment information corresponding to the fast wireless charge identification information as normal wireless charge acknowledgment information.

3. The method according to claim 1 , further comprising:
requesting a first voltage from the charger after acquiring the voltage and current capability information of the charger.

4. A method for wireless charging, the method being applied to a power management apparatus, comprising:
sending, in response to a wireless charging transmitter detecting a first voltage input after the wireless charging transmitter acquires voltage and current capability information of a charger, fast wireless charge identification information to a wireless charging receiver;
determining a charging request based on acknowledgment information received from the wireless charging receiver and sent by the wireless charging transmitter, wherein the acknowledgment information is generated by the wireless charging receiver in response to the fast wireless charge identification information;
sending, from the power management apparatus, the charging request to the wireless charging receiver; and
setting an input current of the power management apparatus according to the charging request and a charging efficiency.

5. The method according to claim 4 , determining a charging request based on acknowledgment information received from the wireless charging receiver comprising:
determining the charging request based on the acknowledgment information received from the wireless charging receiver if the acknowledgment information is received within a first time period after sending the fast wireless charge identification information.

6. The method according to claim 5 , wherein the determining the charging request based on the acknowledgment information comprises:
determining, when the acknowledgment information is fast wireless charge acknowledgment information, the charging request as a fast wireless charging request; and
determining, when the acknowledgment information is normal wireless charge acknowledgment information, the charging request as a normal wireless charging request.

7. The method according to claim 5 , further comprising:
determining the charging request as a normal wireless charging request when the acknowledgment information is not received within a first time period after sending the fast wireless charge identification information.

8. The method according to claim 6 , further comprising:
determining the charging request as a normal wireless charging request when the acknowledgment information is not received within a first time period after sending the fast wireless charge identification information.

9. A wireless charging system comprising a wireless charging transmitter, the wireless charging transmitter comprising:
a processor; and
a memory for storing instructions executable by the processor,
wherein the processor is configured to:
when detecting that a connection is established between the wireless charging transmitter and a charger, instruct the wireless charging transmitter to acquire voltage and current capability information of the charger;
when receiving fast wireless charge identification information from a wireless charging receiver, determine acknowledgment information corresponding to the fast wireless charge identification information according to the voltage and current capability information of the charger;
instruct the wireless charging transmitter to send the acknowledgment information to the wireless charging receiver; and
when receiving a charging request from the wireless charging receiver in response to the acknowledgment information, request the charger for a voltage and a current corresponding to the charging request.

10. The wireless charging system according to claim 9 , wherein the processor is further configured to:
in response to fast wireless charge identification information received from the wireless charging receiver, demodulate the fast wireless charge identification information;
when the fast wireless charge identification information is correctly demodulated and the charger satisfies a requirement of fast wireless charging according to the voltage and current capability information of the charger, determine the acknowledgment information corresponding to the fast wireless charge identification information as fast wireless charge acknowledgment information; and
when the fast wireless charge identification information is correctly demodulated and the charger does not satisfy the requirement of fast wireless charging according to the voltage and current capability information of the charger, determine the acknowledgment information corresponding to the fast wireless charge identification information as normal wireless charge acknowledgment information.

11. The wireless charging system according to claim 9 , wherein the processor is further configured to:
request a first voltage from the charger.

12. The wireless charging system according to claim 9 , further comprising a power management apparatus, the power management apparatus comprising:
a management processor; and
a management memory for storing instructions executable by the management processor,
wherein the management processor is configured to:
in response to detecting a first voltage input, send fast wireless charge identification information to the wireless charging receiver;
determine a charging request based on acknowledgment information received from the wireless charging receiver, wherein the acknowledgment information is generated by the wireless chargi

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Wang Yanteng
• Li Zhijie
• Cui hongtu

Classifications

• H02J50/10 Primary

  using inductive coupling · CPC title

• H02J50/80 Primary

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

• H04W12/06

  Authentication · CPC title

• H02J7/025

  Electricity · mapped topic

• H04B5/0037

  Electricity · mapped topic