Electronic Device Fast Charging Method, Apparatus, and Device

Patent metadata

Field	Value
Publication number	US-2017207648-A1
Application number	US-201415326526-A
Country	US
Kind code	A1
Filing date	Jul 16, 2014
Priority date	Jul 16, 2014
Publication date	Jul 20, 2017
Grant date	—

Abstract

A fast charging method, apparatus, and device for a USB electronic device including obtaining, according to a preset charging current threshold, a corresponding charging data set of the electronic device under the present charging current threshold, determining, according to the charging data set, a maximum charging current value corresponding to the electronic device; setting the determined maximum charging current value as a charging current threshold of the electronic device, and controlling charging of the electronic device according to the charging current threshold.

First claim

What is claimed is:

1 . A fast charging method for an electronic device, the method comprising:
performing a successful communication handshake with a Universal Serial Bus (USB) host device by using a USB interface of the electronic device; measuring, according to a preset charging current threshold, a corresponding charging data set of the electronic device under the charging current threshold, wherein the charging current threshold comprises a first charging current threshold and a second charging current threshold, and wherein the charging data set comprises:
a corresponding first charging voltage value and a corresponding first charging current value of the electronic device under the first charging current threshold; and
a corresponding second charging voltage value and a corresponding second charging current value of the electronic device under the second charging current threshold;
determining, according to the charging data set, a maximum charging current value corresponding to the electronic device; setting the maximum charging current value as a third charging current threshold of the electronic device; and controlling charging of the electronic device according to the third charging current threshold.

2 . The method according to claim 1 , wherein measuring the corresponding charging data set comprises:
setting a data collection point in a power management integrated circuit of the electronic device; and acquiring the corresponding charging data set of the electronic device under the charging current threshold from an analog to digital converter of the power management integrated circuit.

3 . The method according to claim 2 , wherein determining
the maximum charging current value comprises: calculating a supply voltage value of the USB host device and an impedance value of a USB connection cable according to the first charging voltage value, the first charging current value, the second charging voltage value, and the second charging current value; calculating a charging current consumption rate coefficient according to the supply voltage value of the USB host device, the impedance value of the USB connection cable, the first charging current threshold, and the second charging current threshold; and calculating a maximum charging current value according to the charging current consumption rate, wherein the maximum charging current value corresponds to the electronic device when a minimum working voltage of the electronic device is met.

4 . The method according to claim 1 , wherein after the maximum charging current value is set to the third charging current threshold, the method further comprises:
switching the charging current threshold of the electronic device from third charging current value to the first charging current threshold after charging of the electronic device is controlled according to the third charging current threshold for a first time value; and controlling charging of the electronic device according to the first charging current threshold.

5 . The method according to claim 4 , wherein the method further comprises:
controlling charging of the electronic device according to the first charging current threshold for a second time value; switching the charging current threshold of the electronic device from the first charging current value to the third charging current threshold; and controlling charging of the electronic device according to the third charging current threshold.

6 . The method according to claim 4 , wherein switching the charging current threshold of the electronic device from the third charging current value to the first charging current threshold and controlling charging of the electronic device according to the first charging current threshold comprises:
detecting temperature data of the electronic device; determining whether the temperature data is greater than a first temperature threshold; switching the charging current threshold of the electronic device from the third charging current value to the first charging current threshold when the temperature data is greater than the first temperature threshold; and controlling charging of the electronic device according to the first charging current threshold.

7 . The method according to claim 4 , wherein switching the charging current threshold of the electronic device from the third charging current value to the first charging current threshold and controlling charging of the electronic device according to the first charging current threshold comprises:
determining a duration in which charging of the electronic device is controlled according to the third charging current threshold; switching the charging current threshold of the electronic device from the third charging current value to the first charging current threshold when the duration in which charging of the electronic device is controlled according to the third charging current threshold is greater than a preset first time threshold; and controlling charging of the electronic device according to the first charging current threshold.

8 . The method according to claim 1 , wherein the third charging current threshold is greater than the first charging current threshold, and wherein the first charging current threshold is greater than the second charging current threshold.

9 . A fast charging apparatus for an electronic device, the apparatus comprising:
a Universal Serial Bus (USB) interface; and a processor coupled with the USB interface, wherein the processor is configured to:
perform a successful communication handshake with a USB host device by using the USB interface;
measure, according to a preset charging current threshold, a corresponding charging data set of the electronic device under the charging current threshold, wherein the charging current threshold comprises a first charging current threshold and a second charging current threshold, wherein the charging data set comprises a corresponding first charging voltage value and a corresponding first charging current value of the electronic device under the first charging current threshold, and wherein the charging data set further comprises a corresponding second charging voltage value and a corresponding second charging current value of the electronic device under the second charging current threshold; determine, according to the charging data set, a maximum charging current value corresponding to the electronic device; and a charger configured to: set the determined maximum charging current value as a third charging current threshold of the electronic device; and control charging of the electronic device according to the third charging current threshold.

10 . The apparatus according to claim 9 , wherein the processor is further configured to:
set a data collection point in a power management integrated circuit of the electronic device; and acquire the corresponding charging data set of the electronic device under the charging current threshold from an analog to digital converter of the power management integrated circuit.

11 . The apparatus according to claim 10 , wherein the processor is further configured to:
calculate a supply voltage value of the USB host device and an impedance value of a USB connection cable according to the first charging voltage value, the first charging current value, the second charging voltage value, and the second charging current value; calculate a charging current consumption rate coefficient according to the supply voltage value of the USB host device, the impedance value of the USB connection cable, the first charging current threshold, and the second charging current threshold; and cal

Assignees

• Huawei Tech Co Ltd

Inventors

• Xiao Fuzhou

Classifications

• H02J7/00 Primary

  Circuit arrangements for charging or discharging batteries or for supplying loads from batteries · CPC title

• G01R19/30

  Measuring the maximum or the minimum value of current or voltage reached in a time interval (G01R19/04 takes precedence) · CPC title

• H02J7/0052 Primary

  Electricity · mapped topic

• H02J2007/0062

  Electricity · mapped topic

• H02J7/42

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