According to the installation location, it can be divided into public charging piles and special charging piles such as EV Charging Pile. The public charging pile is a charging pile built in a public parking lot (library) combined with parking berths to provide public charging services for social vehicles. The special charging pile is a charging pile used by the construction unit (enterprise) own parking lot (library) for the internal personnel of the unit (enterprise). The self-use charging pile is built in a personal own parking space (library) to provide charging stations for private users. The charging pile is generally constructed in conjunction with the parking space of the parking lot (library). The charging post installed outdoors should not be less than IP54. The charging pile installed indoors should not be less than IP32.