As an energy storage device, it uses the brake energy recovery technology during braking to provide auxiliary starting. As a voltage stabilizing device, it cooperates with the grid power to provide the necessary energy to the vehicle when the total load of the grid system changes and fluctuates. As an auxiliary power supply for the fuel cell system, it provides "auxiliary power" for the system vehicles, realizes brake energy recovery, and high-power charging and discharging at the moment of starting and stopping, and can stabilize the voltage of the main power battery system during the starting process.
