Fast charging system, one to many fast charging data cable, and charging management device

A charging management device, comprising:

• one charging input interface, comprising a first data transmission pin;
• a plurality of charging output interfaces, wherein each of the charging output interfaces comprises a second data transmission pin;
• and the second data transmission pin of each of the charging output interfaces can be connected to the first data transmission pin of the charging input interface to form a conductive data communication path, such that communication between the charging input interface and the corresponding charging output interfaces is implemented;
• and
• a power management module configured to detect whether each of the charging output interfaces is connected to a consumption device;
• and when the power management module detects that at least one charging output interface is connected to one consumption device, one data communication path corresponding to the charging output interface connected to the consumption device is controlled to be powered on to obtain rated charging information of the consumption device, such that the charging output interface connected to the corresponding consumption device outputs a power output signal matching the rated charging information;
• wherein the charging input interface further comprises a first power transmission pin;
• each of the charging output interfaces further comprises a second power transmission pin;
• and the second power transmission pin of each of the charging output interfaces can be connected to the first power transmission pin of the charging input interface to form a conductive power supply path;
• and
• the power management module is further configured to control the data communication path corresponding to the at least one charging output interface to be powered on to obtain rated charging information of the consumption device when only one charging output interface is connected to the consumption device, and outputs a power output signal matching the rated charging information to the corresponding charging output interface according to the rated charging information of the consumption device;
• wherein the power management module further comprises:
• a step-down unit connected to the first power transmission pin and configured to step down a power signal outputted by the first power transmission pin;
• a power supply channel switch unit which comprises a plurality of first channel switches and a plurality of second channel switches;
• the first channel switches are connected between the first power transmission pin and the corresponding second power transmission pin, and the second channel switches are connected between the step-down unit and the corresponding second power transmission pin;
• and the first channel switches, the second channel switches and the second power transmission pin are in one-to-one correspondence;
• and
• a main control unit which is respectively connected to the step-down unit, the plurality of first channel switches and the plurality of second channel switches, and is configured to control the first channel switch corresponding to the charging output interface connected to a consumption device with a maximum charging voltage to be powered on and the second channel switch to be powered off when it is detected that at least two charging output interfaces are simultaneously connected to the consumption device;
• and the main control unit is also configured to control the second channel switches corresponding to the charging output interfaces connected to the remaining consumption device to be powered on and the first channel switches to be powered off.