Charging control method and charging device

Patent metadata

Field	Value
Publication number	US-10714950-B2
Application number	US-201816136545-A
Country	US
Kind code	B2
Filing date	Sep 20, 2018
Priority date	Jan 28, 2014
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

A quick-charging control method and system are suitable for mobile terminals. The method includes: a first controller obtaining a voltage value of a cell, and sending the voltage value to a second controller; the second controller searching a threshold segment table to find a current regulation instruction matched with a threshold segment containing the voltage value of the cell, and sending the current regulation instruction to a regulation circuit; the regulation circuit performing a current regulation according the current regulation instruction, and outputting a power signal; the second controller sending a second switch-off instruction to the first controller and a second switch circuit respectively if second abnormal charging information is detected; and the second switch circuit, controlling the charging adapter to stop sending the power signal after the current regulation if the second switch circuit receives the second switch-off instruction.

First claim

What is claimed is:

1. A charging control method, applicable to a charging device and comprising:
sending a quick-charging request to a device to be charged to ask the device to be charged whether to accept a high-current charging of the charging device on a cell of the device to be charged;
receiving a quick-charging permission instruction sent by the device to be charged and performing high-current charging on the cell of the device to be charged;
sending a notification request to the device to be charged, wherein the notification request is configured to notify the device to be charged of sending the voltage value of the cell in real time;
obtaining a voltage value of the cell of the device to be charged;
searching a threshold segment table to find a current regulation instruction matched with a threshold segment containing the voltage value of the cell;
performing current regulation on a first power signal to be outputted by the charging device based on the current regulation instruction to acquire a second power signal; and
outputting the second power signal to the device to be charged.

2. The method of claim 1 , wherein the threshold segment table records one or more threshold segments and current regulation instructions having a mapping relation with the threshold segments.

3. The method of claim 1 , further comprising:
detecting a current value of the second power signal;
when an absolute value of a difference between the current value detected and a current value specified by the current regulation instruction is greater than a difference threshold, calibrating the second power signal; and
outputting the second power signal after calibration, wherein a current value of the second power signal after calibration is equal to the current value specified by the current regulation instruction.

4. The method of claim 1 , further comprising:
detecting abnormal charging information; and
closing an output of the charging device in response to detecting the abnormal charging information.

5. The method of claim 4 , wherein the abnormal charging information comprises at least one of information indicating that a temperature value of the charging device is higher than a first temperature threshold, information indicating that the charging device has been pulled out, information indicating that a current value of the second power signal is greater than a current threshold, and information indicating that a voltage value of the second power signal is greater than a voltage threshold.

6. The method of claim 1 , further comprising:
receiving abnormal charging information sent by the device to be charged; and
closing an output of the charging device in response to receiving the abnormal charging information sent by the device to be charged, wherein the abnormal charging information sent by the device to be charged comprises at least one of an anode contact signal generated when an anode of the cell is not in good contact, a cathode contact signal generated when a cathode of the cell is not in good contact, and a temperature signal generated when a temperature of the cell is higher than a second temperature threshold.

7. The method of claim 1 , further comprising:
sending the second power signal to a first charging interface of the device to be charged via a second charging interface of the charging device, such that the charging device charges the cell of the device to be charged, wherein the first charging interface comprises P first power wires and Q first ground wires, the second charging interface comprises P second power wires and Q second ground wires, the P first power wires are coupled to the P second power wires correspondingly, the Q first ground wires are coupled to the Q second ground wires correspondingly, P is greater than or equal to 2, and Q is greater than or equal to 2.

8. The method of claim 7 , wherein the first charging interface further comprises at least two first data wires, and the second charging interface further comprises at least two second data wires,
obtaining the voltage value of the cell of the device to be charged, comprises:
obtaining the voltage value of the cell of the device to be charged via the at least two first data wires and the at least two second data wires.

9. A charging device, comprising:
a controller, configured to send a quick-charging request to a device to be charged to ask the device to be charged whether to accept a high-current charging of the charging device on a cell of the device to be charged, and receive a quick-charging permission instruction sent by the device to be charged; send a notification request to the device to be charged, wherein the notification request is configured to notify the device to be charged of sending the voltage value of the cell in real time; obtain a voltage value of the cell of the device to be charged, and search a threshold segment table to find a current regulation instruction matched with a threshold segment containing the voltage value of the cell; and
a regulation circuitry, configured to perform current regulation on a first power signal to be outputted by the charging device based on the current regulation instruction to acquire a second power signal, and output the second power signal to the device to be charged.

10. The device of claim 9 , wherein the threshold segment table records one or more threshold segments and current regulation instructions having a mapping relation with the threshold segments.

11. The device of claim 9 , further comprising:
a current detection circuitry, configured to detect a current value of the second power signal;
a calibrating circuitry, configured to, when an absolute value of a difference between the current value detected and a current value specified by the current regulation instruction is greater than a difference threshold, calibrate the second power signal, and output the second power signal after calibration, wherein a current value of the second power signal after calibration is equal to the current value specified by the current regulation instruction.

12. The device of claim 9 , further comprising:
an abnormal detection circuitry, configured to detect abnormal charging information; and
a first switch circuitry, configured to close an output of the charging device in response to detecting the abnormal charging information.

13. The device of claim 12 , wherein the abnormal charging information comprises at least one of information indicating that a temperature value of the charging device is higher than a first temperature threshold, information indicating that the charging device has been pulled out, information indicating that a current value of the second power signal is greater than a current threshold, and information indicating that a voltage value of the second power signal is greater than a voltage threshold.

14. The device of claim 9 , wherein the controller is further configured to receive abnormal charging information sent by the device to be charged; and the device further comprises a second switch circuitry, configured to close an output of the charging device in response to receiving the abnormal charging information sent by the device to be charged, wherein the abnormal charging information sent by the device to be charged comprises at least one of an anode contact signal generated when an anode of the cell is not in good contact, a cathode contact signal generated when a cathode of the cell is not in good contact, and a temperature signal generated when a temperature of the cell is higher than a second temperature threshold.

15. The device of claim 9 ,

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Zhang Jialiang
• Wu Kewei
• Zhang Jun
• Peng Liangcai
• Liao Fuchun

Classifications

• H02J7/751

  concerning the insertion or the connection of the batteries · CPC title

• H02J7/90 Primary

  Regulation of charging or discharging current or voltage · CPC title

• H02J7/68

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

• H02J7/64

  against overvoltage · CPC title

• H02J7/62

  against overcurrent · CPC title