The charging pile is similar to the gas station inside the gas station, which can be fixed to the ground or wall, mounted in public buildings (public buildings, shopping malls, public parking, etc.) and residential community parking or charging station, can be based on different voltage levels Charging the electric vehicle for various models. The input of the charging pile is directly connected to the AC grid, and the output is equipped with a charging plug to charge the electric vehicle. Charging piles generally provide routine charging and fast charging two kinds of charging methods, people can use a specific charging card to use the human computer interaction interface provided by the charging pile, perform corresponding charging methods, charging time, cost data printing, etc. Charging pile display can display data for charging, cost, charging time, etc. Widely applied electric automotive charging piles, small appliances, automotive electronics, power supplies, chargers, motors and so on.