Vehicle power supply

The invention discloses a vehicle power supply which comprises a supply shell. Power supply equipment is installed in the supply shell, heat dissipation holes are formed in the side wall of the supplyshell, an exhaust pipe communicated with the interior of the supply shell is fixedly connected to the supply shell, and a windward pipe communicated with the interior of the exhaust pipe is fixedly connected to the side wall of the exhaust pipe. A liquid storage tank is formed in the inner wall of the supply shell, an air inlet pipe is arranged at the inner top of the liquid storage tank, a liquid pumping barrel is fixedly connected to the upper end of the supply shell, and an electromagnet and an iron sheet are fixedly connected to the two opposite side walls of the liquid pumping barrel respectively. By arranging the windward pipe, the exhaust pipe and other components, the windward pipe extends out of a vehicle during installation, and when the vehicle runs, air flows in the windward pipe at a high speed, so t