A charging control method comprising: establishing communication between a charging device and a terminal device, the terminal device comprising a first controller, and the charging device comprising a second controller; obtaining, by the second controller in communication with the first controller, a voltage value of a cell of the terminal device; searching, by the second controller, a threshold segment table to find a current regulation instruction matched with a threshold segment containing the voltage value of the cell; rectifying and filtering, by a regulation circuit of the charging device, an input electric supply to obtain a first power signal, and performing, by the regulation circuit, current regulation on the first power signal based on the current regulation instruction to obtain a second power signal, and outputting, by the charging device, the second power signal to the terminal device; detecting, by the charging device, abnormal charging information; closing, by a second switch circuit of the charging device, the output of the charging device in response to detecting the abnormal charging information; characterised in that the method further comprises: sending, by the second controller, a quick-charging request to the first controller to ask the terminal device whether to accept a high-current charging of the charging device on the cell of the terminal device; and receiving, by the second controller, a quick-charging permission instruction sent by the first controller and performing high-current charging on the cell of the terminal device. establishing communication between a charging device and a terminal device, the terminal device comprising a first controller, and the charging device comprising a second controller; obtaining, by the second controller in communication with the first controller, a voltage value of a cell of the terminal device; searching, by the second controller, a threshold segment table to find a current regulation instruction matched with a threshold segment containing the voltage value of the cell; rectifying and filtering, by a regulation circuit of the charging device, an input electric supply to obtain a first power signal, and performing, by the regulation circuit, current regulation on the first power signal based on the current regulation instruction to obtain a second power signal, and outputting, by the charging device, the second power signal to the terminal device; detecting, by the charging device, abnormal charging information; closing, by a second switch circuit of the charging device, the output of the charging device in response to detecting the abnormal charging information; characterised in that the method further comprises: sending, by the second controller, a quick-charging request to the first controller to ask the terminal device whether to accept a high-current charging of the charging device on the cell of the terminal device; and receiving, by the second controller, a quick-charging permission instruction sent by the first controller and performing high-current charging on the cell of the terminal device. sending, by the second controller, a quick-charging request to the first controller to ask the terminal device whether to accept a high-current charging of the charging device on the cell of the terminal device; and receiving, by the second controller, a quick-charging permission instruction sent by the first controller and performing high-current charging on the cell of the terminal device.