Power supply system for vehicle control unit and method thereof

A power supply system with automatic switchover voltage for vehicle control unit at least comprising:

• a supply communication module configured to communicate with a vehicle control unit of a mobile vehicle, said supply communication module comprising a power supply module to provide power for said vehicle control unit of said mobile vehicle;
• a communication device coupled to said supply communication module for showing power supply status;
• a preset charging module coupled to said supply communication module to preset a time point for said power supply module to start to charge said vehicle control unit of said mobile vehicle;
• a supply time setting module coupled to said supply communication module to set a time period for said power supply module to charge said vehicle control unit of said mobile vehicle;
• and
• a charging money setting module coupled to said supply communication module to set an amount of money for said power supply module to charge said vehicle control unit of said mobile vehicle;
• wherein said supply communication module provides a first direct voltage and communicates with said vehicle control unit of said mobile vehicle before supplying power, and if said supply communication module does not receive any message from said vehicle control unit of said mobile vehicle within a first time interval, said supply communication module automatically switches to a second direct voltage from said first direct voltage or automatically increases said first direct voltage within a second time interval, and supplies power to said vehicle control unit;
• and wherein said second direct voltage is greater than said first direct voltage.