There are two charging methods for new energy vehicles: AC charging and DC charging, so there are also AC charging piles and DC charging piles. There is a large gap between communication charging piles and DC charging piles in technical parameters such as current and voltage. The former has low charging efficiency, while the latter has high charging efficiency. Generally speaking, "slow charging" basically uses AC charging, while "fast charging" mostly uses DC charging.

Communication charging piles are fixed equipment in community parking lots, residential areas, shopping malls, service areas, roadside parking lots, etc., and are connected to the power grid to provide controllable one-way AC power or three-phase power supply for new energy vehicle on-board power supplement equipment. AC power supply equipment. The AC charging pile itself does not have a charging function. It only supplies power output. It also needs to be connected to the on-board power supplement equipment of the new energy vehicle to charge the battery of the new energy vehicle. Because the power of the on-board power compensation equipment of new energy vehicles is generally small, common charging piles cannot achieve fast charging.

Communication new energy car charging pile, commonly known as "slow charging", is a power supply device with fixed equipment outside the new energy car and connected to the communication grid. supplementary equipment) to supply AC power. The AC charging pile only provides power output and does not have a charging function. It needs to be connected to on-board power compensation equipment to charge new energy vehicles. It is equivalent to controlling the power supply. The AC charging pile has low power and is suitable for applications that do not require sensitive charging time. Generally, the charging time is about 7-10 hours. Common communication charging piles are floor-mounted, wall-mounted and portable. Portable can be simply understood as a plug, one end is plugged into a household socket, and the other end is plugged into the charging port of a new energy vehicle. After use, it can be put directly into the trunk. It can be used where there are sockets. The communication charging pile is small in size and simple in equipment, and the corresponding cost is relatively low. It is suitable for public parking lots, free gifts, residential properties, commercial areas, hotel underground garages and other places.

In short, AC charging piles need to be charged with on-board power supplement equipment, while DC fast charging piles do not need this equipment. There's a big difference in charging speed between the two. It takes 8 hours for a pure new energy vehicle (normal battery capacity) to be fully charged through an AC charging pile, while it only takes 2 to 3 hours to fully charge through a DC fast charging pile. The AC charging pile provides power input for the electric vehicle power compensation equipment. Because the power of the on-board power compensation equipment is not large, fast charging cannot be completed. The DC fast charging pile is a power supply device fixed outside the new energy vehicle and connected to the AC grid, which can supply DC power to the power battery of the non-vehicle new energy vehicle. The DC charging pile can supply sufficient power, and the output voltage and current can be adjusted in a wide range, which can meet the requirements of fast charging.