Abstract: An electronic device and a power adapter are provided. The power adapter comprises a power circuit, a main control circuit, a potential adjustment circuit, a current detection circuit, a voltage detection circuit and an output switch circuit. When a conventional charging or a quick charging is performed on the battery in the electronic device, the main control circuit determines whether the output current of the power adapter is greater than a current threshold according to the current detecting signal and determines whether the output voltage of the power adapter is greater than a voltage threshold according to the voltage detecting signal; if the output current of the power adapter is greater than the current threshold and/or the output voltage of the power adapter is greater than the voltage threshold, the main control circuit controls the output switch circuit to turn off the direct current output of the power adapter.

Abstract: The present disclosure relates to the technical field of charging. A terminal and a battery charging control device and method therefore. The battery charging control device comprising a battery connector, a main control module and a fast charge switch module is adopted. During normal charge or fast charge of a battery in the terminal, the main control module carries out data communication with an external power adapter through a communication interface of the terminal, and obtains a charging voltage and a charging current of the battery; and if the charging voltage is larger than a voltage threshold and/or the charging current is larger than a current threshold, the main control module sends a charging OFF command so that a controller of the terminal enables the communication interface of the terminal, thereby achieving overvoltage and/or overcurrent protection on the battery.

Abstract: A charging method and system applied to the field of mobile terminals. The charging method comprises: a cell detection circuit acquiring a voltage value of a cell and sending the acquired voltage value of the cell to a second controller; the second controller finding from a threshold value section table a current regulation command that is matched with a threshold value section in which the voltage value of the cell is located, and sending the current regulation command to a regulation circuit, wherein the threshold value section table records one or more threshold value sections and current regulation commands having a mapping relation with the threshold value sections; and the regulation circuit performing current regulation according to the current regulation command, and outputting a power signal after the current regulation.

Abstract: A quick-charging method and system suitable for the field of mobile terminals. The method comprises: (S1) a second controller (21) sending a quick-charging request to a first controller (11); (S2) the first controller feeding back a quick-charging permission command to the second controller; (S3) the second controller sending a notification request for obtaining a voltage value of a cell to the first controller; (S4) the first controller obtaining the voltage value of the cell by means of a cell connector, and sending the obtained voltage value of the cell to the second controller; (S5) the second controller finding a current regulation instruction matching a threshold section that the voltage value of the cell falls within from a threshold section table, and sending a current regulation instruction to a regulation circuit (22); and (S6) the regulation circuit adjusting a current according to the current regulation instruction, and outputting a power supply signal of which the current is regulated.