Charging method and electronic devices

• US 10,797,502 B2
• Filed: 10/20/2017
• Issued: 10/06/2020
• Est. Priority Date: 10/21/2016
• Status: Active Grant

• Current Assignee: Beijing Xiaomi Mobile Software Co., Ltd. (Xiaomi Corp.)
• Original Assignee: Beijing Xiaomi Mobile Software Co., Ltd. (Xiaomi Corp.)
• Inventors: Fan, Jie, Sun, Chang Yu, Li, Ning Chao
• Primary Examiner(s): Fantu, Yalkew
• Application Number:
  US15/789,116
• Publication Number:
  US 20180115179A1
• Time in Patent Office: 1,082 Days
• Field of Search: 320137
• CPC Class Codes: G06F 1/266 Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/0071 with a programmable schedule

Abstract

The present disclosure provides a charging method and an electronic device, in the field of electronic technology. The charging method is applied in electronic devices. The electronic device includes a charging circuit including a first charging path, a second charging path, and a parallel charging path operating, the method comprising: disconnecting the first charging path, when the charging circuit is in the first charging mode and the electronic device is detected to be connected to the second charging mode; obtaining a charging protocol used in the second charging mode; and determining whether to adopt the first charging path, the second charging path, or the parallel charging path to charge the electronic device according to the charging protocol.

Claims

1. A method for charging an electronic device, comprising:

disconnecting a first charging path, when a charging circuit is in a first charging mode and the electronic device is detected to be connected to a second charging mode, wherein the electronic device comprises the charging circuit including the first charging path comprising a first switch operating in the first charging mode, a second charging path comprising a third switch operating in a second charging mode, and a parallel charging path comprising a second switch operating simultaneously in the first charging mode and the second charging mode;

controlling the parallel charging path through the first switch and the second switch;

controlling the second charging path through the third switch;

obtaining a charging protocol corresponding to a charging type used in the second charging mode; and

determining whether to adopt the first charging path, the second charging path, or the parallel charging path to charge the electronic device, according to the charging protocol.

2. The method of claim 1, wherein determining whether to adopt the first charging path, the second charging path, or the parallel charging path to charge the electronic device according to the charging protocol comprises:

controlling whether to connect or disconnect one of the first charging path, the second charging path, and the parallel charging path to parallel charge the electronic device, when the charging protocol used in the second charging mode is a first type protocol.

3. The method of claim 2, further comprising:

when the first charging path is a wired charging path and the second charging path is a wireless charging path, the first charging mode is a wired charging mode, the second charging mode is a wireless charging mode, and the first type protocol includes wireless charging Qi protocol and manufacturing automation protocol (MAP).

4. The method of claim 2, further comprising:

when the first charging path is a wireless charging path and the second charging path is a wired charging path, the first charging mode is a wireless charging mode, the second charging mode is a wired charging mode, and the first type protocol includes battery charging BC1.2 protocol.

5. The method of claim 2, wherein determining whether to adopt the first charging path, the second charging path, or the parallel charging path to parallel charge the electronic device comprises:

adopting the first charging path and the parallel charging path by connecting corresponding switches in the first charging path and the second charging path, and disabling the second charging path by disconnecting a corresponding switch in the second charging path.

6. The method of claim 2, wherein controlling whether to adopt the first charging path, the second charging path, or the parallel charging path to parallel charge the electronic device further comprises:

controlling charging current of the charging path operating in a wired charging mode, to ensure an absolute value of difference between the charging current of the charging path operating in the wired charging mode and charging current of the charging path operating in a wireless charging mode within a preset range.

7. The method of claim 2, wherein controlling whether to adopt the first charging path, the second charging path, or the parallel charging path to parallel charge the electronic device further comprises:

receiving first current detection information transmitted by a first charging device and second current detection information transmitted by a second charging device, wherein the first current detection information includes a current value of first current output to the electronic device by the first charging device, and the second current detection information includes a current value of second current output to the electronic device by the second charging device; and

disconnecting the charging path operating in a wireless charging mode and the parallel charging path, in the first charging path and the second charging path, connecting the charging path operating in a wired charging mode, to perform wired charging on the electronic device, when product of the current value of first current and the current value of second current is less than 0.

8. The method of claim 2, wherein controlling whether to adopt the first charging path, the second charging path, or the parallel charging path to parallel charge the electronic device further comprises:

detecting temperature of the electronic device during parallel charging of the electronic device;

disconnecting the charging path operating in a wireless charging mode and the parallel charging path, in the first charging path and the second charging path, and connecting the charging path operating in a wired charging mode, to perform wired charging on the electronic device, when the temperature of the electronic device reaches a preset threshold.

9. The method of claim 1, wherein controlling whether to adopt the first charging path, the second charging path, or the parallel charging path to charge the electronic device according to the charging protocol comprises:

disconnecting the second charging path and the parallel charging path, and connecting the first charging path, to perform wired charging on the electronic device, when the charging protocol used in the second charging mode is a second type protocol, and the second type protocol includes wireless charging standard alliance A4WP protocol.

10. The method of claim 1, wherein controlling whether to adopt the first charging path, the second charging path, or the parallel charging path to charge the electronic device according to the charging protocol comprises:

disconnecting the first charging path and the parallel charging path, and connecting the second charging path, to perform wired charging on the electronic device, when the charging protocol used in the second charging mode is a second type protocol, and the second type protocol includes quick charging QC protocol and power delivery PD protocol.

11. The method of claim 2, wherein controlling whether to adopt the first charging path, the second charging path, or the parallel charging path to parallel charge the electronic device further comprises:

determining whether a wired charging voltage and a wireless charging voltage match up during a parallel charging of the electronic device;

continuing the parallel charging, when the wired charging voltage matches up with the wireless charging voltage; and

disconnecting the charging path operating in the wireless charging mode and the parallel charging path, in the first charging path and the second charging path, and connecting the charging path operating in the wired charging mode, to perform wired charging on the electronic device, when the wired charging voltage does not match up with the wireless charging voltage.

12. An electronic device, comprising:

a charging management module and a charging circuit, wherein

the charging circuit includes a first charging path, a second charging path, and a parallel charging path;

the first charging path includes a first switch and a first charging interface, the first switch is connected with the first charging interface in the first charging path;

the parallel charging path includes a second switch and a second charging interface, the second switch is connected with the second charging interface in the parallel charging path, and the second switch is connected with the first switch in the first charging path;

the second charging path includes a third switch and the second charging interface, the third switch is connected with the second charging interface in the second charging path; and

the charging management module is configured to

control the first charging path through the first switch,

control the parallel charging path through the first switch and the second switch,

control the second charging path through the third switch;

disconnect the first charging path, when the charging circuit is in a first charging mode and the electronic device is detected to be connected to a second charging mode;

obtain a charging protocol corresponding to a charging type used in the second charging mode; and

determine whether to adopt the first charging path, the second charging path, or the parallel charging path to charge the electronic device, according to the charging protocol.

13. The electronic device of claim 12, wherein the charging management module turns on the first switch and the second switch and turns off the third switch to parallel charge the electronic device, when the charging protocol used in a second charging mode is a first type protocol.

14. The electronic device of claim 12 wherein the charging circuit further includes a switch control circuit used by the charging management module to control the first switch, the second switch, and the third switch.

15. The electronic device of claim 14, wherein the switch control circuit connects with a gate of the first switch, a gate of the second switch, and a gate of the third switch;

and

a drain of the first switch is connected with the first charging interface, a source of the first switch is connected with a source of the second switch, a drain of the second switch is connected with the second charging interface, a drain of the third switch is connected with the second charging interface.

16. The electronic device of claim 12, wherein the first switch, the second switch, and the third switch are N-type metal oxide semiconductor field effect transistor NMOS switches.

17. The electronic device of claim 12, wherein the charging management module is further configured to detect the charging type of the charging mode of the electronic device.

18. The electronic device of claim 12, wherein the charging management module is further configured to detect temperature of the electronic device.

19. The electronic device of claim 18, wherein the charging management module is further configured to, when the temperature of the electronic device reaches a preset threshold, control the first switch, the second switch, and the third switch, to disconnect the charging path operating in a wireless charging mode and the parallel charging path, in the first charging path and the second charging path, and to connect the charging path operating in a wired charging mode.

20. A charging apparatus, comprising:

a processor; and

a non-transitory storage medium configured to store executable instructions executed by the processor;

wherein the processor is configured to;

disconnect a first charging path comprising a first switch, when a charging circuit is in a first charging mode, and an electronic device is detected to be connected to a second charging mode;

obtain a charging protocol corresponding to a charging type used in the second charging mode;

adopt one of the first charging path, a second charging path comprising a third switch, and a parallel charging path comprising a second switch to charge the electronic device according to the charging protocol;

control the parallel charging path through the first switch and the second switch; and

control the second charging path through the third switch.