Charger, terminal, charging system, and charging control method

A terminal to be charged by a charger, comprising:

• a charging management chip configured to receive an input direct current (DC) charging current to charge the terminal, the charging management chip including a voltage input port and a chip data port, the voltage input port being configured to receive the input DC charging current;
• a charging port configured to connect to the charger to receive a DC charging current from the charger as the input DC charging current to the charging management chip, the charging port including a power supply port and a data signal port, the power supply port being connected to the voltage input port and configured to output the received DC charging current to the charging management chip;
• a charging control device;
• and
• a switch device provided between the charging management chip and the charging port, and configured to connect the data signal port to the voltage input port or the chip data port according to control of the charging control device.

A charging system, comprising:

• a terminal;
• and
• a charger configured to charge the terminal,
• wherein the charger comprises:
• a power supply device configured to output a direct current (DC) charging current by rectifying and reducing a voltage of an input alternating current (AC), the power supply device including a voltage output port and a feedback receiving port, the voltage output port being configured to output the DC charging current, and the feedback receiving port being configured to receive a feedback signal to adjust the output DC charging current;
• a first charging port configured to connect to the terminal, and to output the DC charging current from the power supply device to the terminal, the first charging port including a first power supply port and a first data signal port, the first power supply port being connected to the voltage output port and configured to output the DC charging current to the terminal;
• a first charging control device;
• and
• a first switch device provided between the feedback receiving port and the first charging port, and configured to connect the feedback receiving port to the first power supply port or the first data signal port according to control of the first charging control device;
• and
• wherein the terminal comprises:
• a charging management chip configured to receive an input DC charging current to charge the terminal, the charging management chip including a voltage input port and a chip data port, the voltage input port being configured to receive the input DC charging current;
• a second charging port configured to connect to the charger to receive the DC charging current from the charger as the input DC charging current to the charging management chip, the second charging port including a second power supply port and a second data signal port, the second power supply port being connected to the voltage input port, and configured to output the received DC charging current to the charging management chip;
• a second charging control device;
• and
• a second switch device provided between the charging management chip and the second charging port, and configured to connect the second data signal port to the voltage input port or the chip data port according to control of the second charging control device.