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Technology and classification of charging piles

Charging pile refers to a charging device that provides energy supplement for electric vehicles. Its function is similar to that of a fuel dispenser in a gas station. It can be fixed on the ground or wall and installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential areas In the parking lot or charging station, various types of electric vehicles can be charged according to different voltage levels.

Classification of charging piles

Classified according to installation method

It can be divided into floor-mounted charging piles and wall-mounted charging piles. Floor-mounted charging piles are suitable for installation in parking spaces that are not close to walls. Wall-mounted charging piles are suitable for installation in parking spaces close to walls.

Classification according to installation location

According to the installation location, it can be divided into public charging piles and special charging piles. Public charging piles are charging piles built in public parking lots (garages) combined with parking spaces to provide public charging services for social vehicles. The special charging pile is the charging pile used by the construction unit (enterprise)’s own parking lot (garage) for the internal personnel of the unit (enterprise). The self-use charging pile is a charging pile built in an individual’s own parking space (garage) to provide charging for private users. The charging pile is generally combined with the parking space of the parking lot (garage). The protection level of charging piles installed outdoors should not be lower than IP54. The protection level of charging piles installed indoors should not be lower than IP32.

Classification according to the number of charging ports

It can be divided into one pile one charge and one pile multiple charge.

Classification according to charging method

Charging piles (plugs) can be divided into DC charging piles (plugs), AC charging piles (plugs) and AC-DC integrated charging piles (plugs).

How to realize charging pile technology?

Electric vehicle charging piles are used as energy supply devices for electric vehicles, and their charging performance is related to the service life and charging time of the battery pack. This is also one of the most concerned aspects of consumers before buying electric vehicles. Achieving fast, efficient, safe and reasonable power supply to the power battery is the basic principle of electric vehicle charger design. In addition, the applicability of the charger to various power batteries must also be considered.

The control system composition of the fast charger:

The control system of the fast charger adopts an intelligent variable pulse charging method, that is, using charging current pulses, including charging pulse T1, intermittent pulse T2 and discharging pulse T3.

The scheme of the charger in the ground charging station, which consists of a rectifier that can convert the input AC power to DC power and a power converter that can regulate the power of the DC power, by inserting the plug with the wire into the matching socket on the electric car , DC power is input into the battery to charge it. The charger is provided with a locking lever to facilitate insertion and removal of the plug, and the lever can also provide a signal to confirm that it has been locked to ensure safety. According to the communication between the charger and the on-board battery management system, the power converter can adjust the DC charging power online, and the charger can display the charging voltage, charging current, charging capacity and charging cost. This is just the basic principle of the charging pile. Many details should be continuously improved in practical applications, and the most convenient use scheme has been obtained.

Charging pile classification
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