Quick-charging control method and system

Patent metadata

Field	Value
Publication number	US-10110028-B2
Application number	US-201415114961-A
Country	US
Kind code	B2
Filing date	May 15, 2014
Priority date	Jan 28, 2014
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

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 quick-charging control method, applied to a charging system comprising a charging adapter and a mobile terminal, and comprising:
with a second controller, sending a quick-charging request to a first controller, wherein the mobile terminal comprises the first controller, a cell connector and a cell, the charging adapter comprises the second controller;
with the first controller, feeding back a quick-charging permission instruction to the second controller;
with the second controller, sending a notification request for obtaining a voltage value of the cell to the first controller;
with the first controller, obtaining the voltage value of the cell via the cell connector according to the notification request, and sending the voltage value of the cell to the second controller;
with 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, wherein the charging adapter comprises the regulation circuit, and the threshold segment table records one or more threshold segments and current regulation instructions having a mapping relation with the threshold segments;
with the regulation circuit, performing a current regulation according to the current regulation instruction, and outputting a power signal after the current regulation, such that the charging adapter outputs the power signal after the current regulation;
with 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, wherein the charging adapter comprises the second switch circuit; and
with 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.

2. The quick-charging control method according to claim 1 , wherein, the regulation circuit comprises a current detection circuit;
with the regulation circuit, performing the current regulation according to the current regulation instruction and outputting the power signal after the current regulation comprises:
with the current detection circuit, detecting a current value of the power signal outputted from the regulation circuit, and sending the current value detected to the second controller;
with the second controller, calculating a difference between the current value detected and a current value specified by the current regulation instruction, and sending a calibration instruction to the regulation circuit if an absolute value of the difference calculated is greater than a difference threshold;
with the regulation circuit, calibrating the power signal according to a current difference specified by the calibration instruction, and outputting the power signal after calibration, wherein a current value of the power signal after calibration is equal to the current value specified by the current regulation instruction.

3. The quick-charging control method according to claim 2 , wherein the regulation circuit comprises a voltage and current regulation circuit;
the quick-charging control method further comprises:
with the regulation circuit, sending a voltage regulation instruction to the voltage and current regulation circuit according to the calibration instruction;
with the voltage and current regulation circuit, performing a voltage regulation according to the voltage regulation instruction, and outputting the power signal after the voltage regulation;
with the current detection circuit, re-detecting whether a current value of the power signal after the voltage regulation is equal to the current value specified by the current regulation instruction;
with the regulation circuit, stopping determining the voltage regulation instruction according to the calibration instruction, and with the voltage and current regulation circuit, stopping performing the voltage regulation if current value of the power signal after the voltage regulation is equal to the current value specified by the current regulation instruction.

4. The quick-charging control method according to claim 2 , wherein the current detection circuit has a current detection resistor; the quick-charging control method further comprises:
with the current detection resistor, detecting the current value of the power signal outputted by the regulation circuit in real time, converting to the voltage value and sending the voltage value converted to the second controller;
with the second controller, determining the current value of the power signal outputted by the regulation circuit according to the voltage value received from the current detection resistor and the resistance of the current detection resistor.

5. The quick-charging control method according to claim 1 , wherein, the charging adapter further comprises a current and voltage detection circuit;
with the second controller, sending the second switch-off instruction to the first controller and the second switch circuit respectively if second abnormal charging information is detected comprises:
with the second controller, obtaining a voltage value and a current value of the power signal after the current regulation via the current and voltage detection circuit, and sending the second switch-off instruction to the first controller and the second switch circuit respectively if the current value of the power signal after the current regulation is greater than an overcurrent threshold and/or the voltage value of the power signal after the current regulation is greater than an overvoltage threshold.

6. The quick-charging control method according to claim 1 , wherein, after with the regulation circuit, performing the current regulation according to the current regulation instruction and outputting the power signal after the current regulation, the quick-charging control method further comprises:
with the charging adapter, sending the power signal to a first charging interface of the mobile terminal via a second charging interface, such that the charging adapter charges the cell of the mobile terminal, wherein there are P first power wires and Q first ground wires in the first charging interface, there are P second power wires and Q second ground wires in the second charging interface, 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.

7. The quick-charging control method according to claim 1 , wherein, the mobile terminal further comprises a first switch circuit, and the first switch circuit is controlled by the first controller to switch on or off;
the quick-charging control method further comprises:
with the first controller, sending a switch-off instruction to the second controller and the first switch circuit respectively if first abnormal charging information is detected, wherein the first abnormal charging information comprises 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 greater than a temperature threshold;
with the first switch circuit, controlling to switch off a charging loop for the charging adapter to charge the cell via the first switch circuit, if the first switch circuit receives the switch-off instruction.

8. The quick-charging control method according to claim 7 , further comprising:
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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