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BATTERY CHARGING APPARATUS AND BATTERY CHARGING PROTECTION CONTROL METHOD

  • US 20170005499A1
  • Filed: 05/14/2014
  • Published: 01/05/2017
  • Est. Priority Date: 01/28/2014
  • Status: Active Grant
First Claim
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1. A battery charging apparatus, comprising a power adapter and a charging control circuit, wherein, charging control circuit is built in an electronic device and coupled to a controller and a battery in the electronic device, the power adapter is coupled to a communication interface of the electronic device via a communication interface thereof, the battery is charged by the power adapter via the communication interface of the electronic device, and the charging control circuit performs data communication with the power adapter via the communication interface of the electronic device;

  • if a conventional charging or a quick charging is performed on the battery, the power adapter first determines whether an output voltage is greater than a voltage threshold and whether an output current is greater than a current threshold, if the output voltage is greater than the voltage threshold and/or the output current is greater than the current threshold, the power adapter sends a first charging stop command to the charging control circuit and automatically switches off direct current output, the charging control circuit drives the controller to switch off the communication interface of the electronic device according to the first charging stop command;

    if the output voltage is not greater than the voltage threshold, and the output current is not greater than the current threshold, the power adapter feeds back output voltage information and output current information to the charging control circuit, if the charging control circuit determines that the output voltage of the power adapter is greater than the voltage threshold and/or the output current of the power adapter is greater than the current threshold according to the output voltage information and the output current information, the charging control circuit feeds back a second charging stop command to the power adapter and drives the controller to switch off the communication interface of the electronic device, and the power adapter switches off the direct current output according to the second charging stop command; and

    if the charging control circuit determines that the output voltage of the power adapter is not greater than the voltage threshold and the output current of the power adapter is not greater than the current threshold according to the output voltage information and the output current information, the power adapter continues to determine the output voltage and the output current.

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