Power adapter, electronic device and method for quick charging electronic device

Patent metadata

Field	Value
Publication number	US-10826307-B2
Application number	US-201815860266-A
Country	US
Kind code	B2
Filing date	Jan 2, 2018
Priority date	Jan 28, 2014
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

The present disclosure provides a power adapter, an electronic device and a charging apparatus. In the process of charging a battery in a conventional charge mode after the power adapter is powered on, the power adapter carries out quick charge inquiry communication with the electronic device when an output current value of the power adapter is within a conventional current range for a preset time interval; after the electronic device sends a quick charge command to the power adapter, the power adapter adjusts the output voltage according to the battery voltage information fed back by the electronic device; and when the output voltage meets a voltage requirement for quick charge preset by the electronic device, the power adapter adjusts the output current and the output voltage for charging the battery in a quick charge mode.

First claim

What is claimed is:

1. An electronic device, comprising a battery, one or more processors, and a memory storing instructions executable by the one or more processors, wherein the one or more processors are configured:
to perform a quick charge inquiry communication with a power adapter to receive a quick charge inquiry command,
to send a quick charge command to the power adapter and feedback battery voltage information when a voltage of the battery reaches a quick charge voltage value,
to perform the quick charge inquiry communication with the power adapter to receive output voltage information comprising an output voltage of the power adapter,
when the device determines that the output voltage of the power adapter meets a voltage requirement for quick charge, to feedback a command for starting the quick charge mode to the power adapter, and
to introduce direct current from the power adapter to charge the battery.

2. The electronic device of claim 1 , further comprising a communication interface; wherein,
the electronic device is configured to be coupled with the power adapter via the communication interface, and to introduce the direct current from the power adapter via the communication interface to charge the battery.

3. The electronic device of claim 1 , further comprising:
a battery connector, a main controller, twelve capacitors, a thirteenth capacitor, thirty-five resistors, a thirty-sixth resistor, a thirty-seventh resistor, a fourteenth capacitor, a first Schottky diode, a second Schottky diode, a fifteenth capacitor, a thirty-eighth resistor, a thirty-ninth resistor, a fortieth resistor, two NPN triodes, a third NPN triode, three NMOS transistors, a fourth NMOS transistor and a fifth NMOS transistor; wherein,
the battery connector is coupled to an electrode of the battery; a first pin and a second pin of the battery connector are jointly grounded; a first ground pin and a second ground pin of the battery connector are jointly grounded; a first input/output pin of the main controller is coupled to a seventh pin and an eighth pin of the battery connector; a second input/output pin, a seventh input/output pin, an eighth input/output pin and a ninth input/output pin of the main controller are coupled to a sixth pin, a fifth pin, a fourth pin and a third pin of the battery connector respectively; an analog ground pin and a ground pin of the main controller are both grounded; a first vacant pin and a second vacant pin of the main controller are suspended; a power pin of the main controller and a first terminal of the thirteenth capacitor are both coupled to the seventh pin and the eighth pin of the battery connector; a fourth input/output pin and an eleventh input/output pin of the main controller are configured to perform data communication with the electronic device; the thirty-sixth resistor is coupled between the fourth input/output pin and the power pin of the main controller; the sixth input/output pin and the twelfth input/output pin of the main controller are coupled to a first communication terminal and a second communication terminal of the main control circuit in the power adapter respectively; a first terminal of the thirty-seventh resistor and a first terminal of the thirty-eighth resistor are jointly coupled to a tenth input/output terminal of the main controller; a second terminal of the thirty-seventh resistor is coupled to the power pin of the main controller; a second terminal of the thirty-eighth resistor is coupled to a base electrode of the third NPN triode; a fifth input/output terminal of the main controller is coupled to a first terminal of the fourteenth capacitor; a second terminal of the fourteenth capacitor and a cathode of the first Schottky diode are jointly coupled to an anode of the second Schottky diode; a first terminal of the thirty-ninth resistor and a first terminal of the fifteenth capacitor are jointly coupled to a cathode of the second Schottky diode; each of a second terminal of the thirty-ninth resistor, a first terminal of the fortieth resistor and a collector electrode of the third NPN triode is coupled to a gate electrode of the fourth NMOS transistor and a gate electrode of the fifth NMOS transistor; a second terminal of the fortieth resistor and a second terminal of the fifteenth capacitor are jointly grounded; a source electrode of the fourth NMOS transistor is coupled to an anode of the first Schottky diode, and also coupled to a seventh pin and an eighth pin of the battery connector; a drain electrode of the fourth NMOS transistor is coupled to a drain electrode of the fifth NMOS transistor; a source electrode of the fifth NMOS transistor is coupled to the communication interface of the electronic device; an emitter electrode of the third NPN triode is coupled to an anode of the third Schottky diode, and a cathode of the third Schottky diode is grounded.

4. The electronic device of claim 3 , further comprising:
a sixth NMOS transistor, a seventh NMOS transistor and a forty-first resistor; a source electrode of the sixth NMOS transistor is coupled to the source electrode of the fifth NMOS transistor; a drain electrode of the sixth NMOS transistor is coupled to a drain electrode of the seventh NMOS transistor, a source electrode of the seventh NMOS transistor is coupled to the collector electrode of the third NPN triode, a gate electrode of the sixth NMOS transistor and a gate electrode of the seventh NMOS transistor are jointly coupled to a first terminal of the forty-first resistor, and a second terminal of the forty-first resistor is grounded.

5. The electronic device of claim 1 , wherein, when based upon the electronic device performing the quick charge inquiry communication with the power adapter, the electronic device is further configured to:
send a quick charge rejecting command to the power adapter based upon the voltage of the battery failing to reach the quick charge voltage value.

6. The electronic device of claim 1 , wherein, the electronic device is further configured to:
send a voltage bias feedback signal to the power adapter based upon the output voltage of the power adapter failing to meet the voltage requirement for quick charge; and
continue to perform the quick charge inquiry communication with the power adapter,
wherein the voltage bias feedback signal comprises a low-voltage feedback signal and a high-voltage feedback signal.

7. The electronic device of claim 1 , wherein, the electronic device is further configured to: detect the voltage of the battery; and
based upon the voltage of the battery being greater than a quick charge voltage threshold, stop to introduce the direct current from the power adapter, and send a quick charge stop command to the power adapter.

8. A charging method, applied to a power adapter, comprising:
detecting an output voltage of the power adapter to obtain a voltage detection signal;
determining whether the output voltage of the power adapter is greater than a voltage threshold according to the voltage detection signal, switching on a direct current output of the power adapter and setting the output voltage of the power adapter as a conventional output voltage when based upon the output voltage of the power adapter not exceeding the voltage threshold;
detecting an output current of the power adapter to obtain a current detection signal;
determining according to the current detection signal whether the output current of the power adapter is within a first current range for a preset time interval, and based upon the output current of the power adapter being within the first current range for the preset time interval, performing a quick charge inquiry communication with an electronic device;
receiving a quick charge command and battery voltage informa

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Zhang Jialiang
• Wu Kewei
• Zhang Jun
• Liao Fuchun
• Hu Yuanxiang

Classifications

• H02J7/685

  using connection detecting circuits (H02J7/68 takes precedence) · CPC title

• H02J7/94

  in response to battery current · CPC title

• H02J7/68

  using circuits for correcting or protecting against reverse-polarity · CPC title

• H02J7/42

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

• H02J7/963

  in response to battery voltage gradient · CPC title