Battery charging apparatus and method

Patent metadata

Field	Value
Publication number	US-2016352132-A1
Application number	US-201415115203-A
Country	US
Kind code	A1
Filing date	May 15, 2014
Priority date	Jan 28, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

A battery charging apparatus and method. The battery charging apparatus comprises a power supply adapter ( 100 ) and a charging control module ( 200 ); during a process of charging a battery ( 300 ), the power supply adapter ( 100 ) charges a battery ( 300 ) in a routine charging mode; when an output current value of the power supply adapter ( 100 ) is within a routine current range at a preset time interval, the power supply adapter ( 100 ) communicates with the charging control module ( 200 ) for quick-charging query; after the charging control module ( 200 ) sends a quick-charging instruction command to the power supply adapter ( 100 ), the power supply adapter ( 100 ) regulates an output voltage according to battery voltage information fed back by the charging control module ( 200 ); and when the output voltage meets a quick charging voltage condition preset by the charging control module ( 200 ), the power supply adapter ( 100 ) regulates an output current and the output voltage in the quick-charging mode to charge the battery ( 300 ), and at the same time, the charging control module ( 200 ) introduces a direct current from the power supply adapter ( 100 ) to charge the battery ( 300 ), thereby achieving the objective of quickly charging the battery ( 300 ) to shorten the charging time.

First claim

What is claimed is:

1 . A battery charging apparatus, being characterized in that,
the battery charging apparatus comprises a power adapter and a charging control module, the power adapter charges via a communication interface thereof a battery of an electronic equipment, the charging module is built in the electronic equipment, and both the charging control module and the battery are coupled with the communication interface of the power adapter via a communication interface of the electronic equipment, and the charging control module is also coupled with electrodes of the battery so as to detect a voltage of the battery; during charging the battery, the power adapter first charges the battery in a regular charging mode; when an output current value of the power adapter falls within a regular current range for a predefined time period, the power adapter performs a quick charge inquiry communication with the charging control module; after the charging control module sends a quick charge command to the power adapter, the power adapter adjusts an output voltage according to battery voltage information fed back by the charging control module; if the output voltage meets a quick charge voltage requirement predefined by the charging control module, the power adapter adjusts an output current and the output voltage according to a quick charge mode so as to charge the battery, and the charging control module simultaneously introduces a direct current from the power adapter to charge the battery.

2 . The battery charging apparatus of claim 1 , being characterized in that,
the power adapter comprises an EMI filter circuit, a high-voltage rectifier and filter circuit, an isolation transformer, an output filter circuit and a voltage tracking and controlling circuit; after EMI of mains electricity is filtered by the EMI filter circuit, the high-voltage rectifier and filter circuit conducts a rectifying and filtering process to output a high-voltage direct current, after passing through the isolation transformer for an electrical isolation, the high-voltage direct current is outputted to the output filter circuit for being filtered and used to charge the battery, and the voltage tracking and controlling circuit adjusts an output voltage of the isolation transformer according to an output voltage of the output filter circuit; the power adapter further comprises a power module, a main control module, a potential regulation module, a current detection module, a voltage detection module and an output switch module; an input terminal of the power module is coupled with a secondary terminal of the isolation transformer; a power terminal of the main control module, a power terminal of the potential regulation module and a power terminal of the current detection module are jointly coupled with an output terminal of the power module; both a high-potential terminal of the main control module and a high-potential terminal of the potential regulation module are coupled with a positive output terminal of the output filter circuit; a potential regulation terminal of the potential regulation module is coupled with the voltage tracking and controlling circuit; a DC input terminal of the current detection module is coupled with the positive output terminal of the output filter circuit, a current-feedback terminal of the current detection module is coupled with a current detection terminal of the main control module; a clock output terminal is coupled with a clock input terminal of the potential regulation module and a data output terminal of the main control module is coupled with a data input terminal of the potential regulation module; a first detection terminal and a second detection terminal of the voltage detection module are coupled with a DC output terminal of the current detection module and a negative output terminal of the output filter circuit, respectively; a first output terminal and a second output terminal of the voltage detection module are coupled with a first voltage detection terminal and a second voltage detection terminal of the main control module, respectively; an input terminal of the output switch module is coupled with the DC output terminal of the current detection module; an output terminal of the output switch module is coupled with a third detection terminal of the voltage detection module; a ground terminal of the output switch module is coupled with the negative output terminal of the output filter circuit, a controlled terminal and a power terminal of the output switch module are coupled with a switch control terminal of the main control module and the secondary terminal of the isolation transformer, respectively; and the negative output terminal of the output filter circuit, the output terminal of the output switch module, a first communication terminal and a second communication terminal of the main control module are all coupled with the communication interface of the power adapter; when the power adapter first charges the battery in the regular charging mode, the main control module controls the output switch module to turn off a DC output of the power adapter; the voltage detection module detects the output voltage of the power adapter and feeds back a voltage detection signal to the main control module; according to the voltage detection signal, the main control module judges whether the output voltage of the power adapter is greater than a voltage threshold; if yes, the main control module continues to judge the output voltage of the power adapter; if not, the main control module controls the output switch module to turn on the DC output of the power adapter, and drives the voltage tracking and controlling circuit through the potential regulation module to set the output voltage of the isolation transformer as a regular output voltage; the current detection module detects the output current of the power adapter and feeds back a current detection signal to the main control module; if the main control module judges according to the current detection signal that the output current of the power adapter is within the regular current range for the predefined time period, the main control module performs the quick charge inquiry communication with the charging control module; after the charging control module sends the quick charge command to the main control module, the main control module drives, according to the battery voltage information fed back by the charging control module and through the potential regulation module, the voltage tracking and controlling circuit to adjust the output voltage of the isolation transformer; if the output voltage of the power adapter meets the quick charge voltage requirement predefined by the charging control module, then through the potential regulation module, the main control module drives the voltage tracking and controlling circuit to adjust the output voltage of the isolation transformer so as to enable the power adapter to output the direct current on the basis of a quick charge output current and a quick charge output voltage, and the charging control module simultaneously introduces the direct current from the power adapter for charging the battery.

3 . The battery charging apparatus of claim 2 , being characterized in that, the power module comprises:
a first capacitor, a voltage stabilizing chip, a second capacitor, a first inductor, a second inductor, a first diode, a second diode, a third capacitor, a first resistor and a second resistor; a junction between a first terminal of the first capacitor and both an input power pin and an enable pin of the voltage stabilizing chip is configured as the input terminal of the power module; a second terminal of the first capacitor and a ground pin of the voltage stabilizing chip are jointly grounded; a switch pin of the voltage stabilizing chip and a first terminal of the second c

Assignees

• Guangdong Oppo Mobile Telecommunicaitons Corp Ltd
• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Zhang Jialiang
• Liu Fengshuo
• Wu Kewei
• Peng Liangcai
• Liao Fuchun
• Hu Yuanxiang

Classifications

• H02J7/68

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

• H02J7/61

  against overcharge · CPC title

• H02J7/42

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

• H02J7/96

  in response to battery voltage · CPC title

• H02J7/94

  in response to battery current · CPC title