On-board integrated charging device and current distribution calculating method thereof

A current distribution calculating method for an on-board integrated charging device, comprising the following steps:

• providing the on-board integrated charging device, wherein the on-board integrated charging device comprises a voltage conversion module, and wherein:
• the voltage conversion module is provided with an Alternating Current (AC) terminal connected to an alternating current or an alternating current load, a High Voltage (HV) terminal connected to a power battery, and a Low Voltage (LV) terminal connected to a direct current load;
• when the AC terminal is idle, the LV terminal is powered by the HV terminal;
• when the AC terminal is connected to the alternating current, the LV terminal and the HV terminal are both powered by the AC terminal;
• and
• when the AC terminal is connected to the alternating current load, the AC terminal and the LV terminal are both powered by the HV terminal;
• taking an input current of the LV terminal as an actual current of the HV terminal when the LV terminal is only powered by the HV terminal;
• acquiring a theoretical current Ihv of the current HV terminal through a preset first calculation method when the HV terminal and the LV terminal are both powered by the AC terminal, wherein the input current of the LV terminal is acquired from the theoretical current Ihv of the current HV terminal minus the actual current Ihv1 of the current HV terminal;
• and
• acquiring a theoretical current Ihv of the current HV terminal through a preset second calculation method when the AC terminal and the LV terminal are both powered by the HV terminal, wherein the input current of the LV terminal is acquired from the actual current Ihv1 of the current HV terminal minus the theoretical current Ihv of the current HV terminal.