Multi-port charging circuit, device and control method

A multi-port charging circuit, including:

• a main power supply module, a control module, a detection module, N backup power supply modules and N power supply ports, wherein N is an integer larger than or equal to 2;
• the power supply capability of each of the N backup power supply modules is less than that of the main power supply module;
• the power supply capability is represented by a rated power;
• wherein:
• each of the N power supply ports is connected to an output end of the main power supply module through a switch;
• an output end of each of the N backup power supply modules is connected to a corresponding power supply port;
• the detection module is respectively connected to the N power supply ports and the control module;
• the control module is connected to each of the switches;
• the N backup power supply modules are configured to supply power by corresponding backup power supply modules when there are devices connected to the corresponding power supply ports;
• the detection module is configured to detect the present power supply information of the power supply ports connected with corresponding devices in real time and send it to the control module;
• the control module is configured to:
• based on the present power supply information of the corresponding power supply port, determine whether the power value required by the device connected to the corresponding power supply port is within the power supply capability range of the corresponding backup power supply module;
• if so, the corresponding power supply port is powered by the corresponding backup power supply module, and the control module controls the switch between the corresponding power supply port and the main power supply module to disconnect, so that the main power supply module is used to support the power supply of other power supply ports;
• if not, control the switch between the corresponding power supply port and the main power supply module to close, so that the main power supply module supplies power to the corresponding power supply port.