1、 Type of Charge Point

1. By charging mode

(1) AC charging pile

AC charging pile, commonly known as "slow charging", is a power supply device that is fixedly installed outside the electric vehicle and connected with the AC power grid to provide AC power for the electric vehicle on-board charger. The AC charging pile only provides power output and has no charging function. It needs to connect the on-board charger to charge the electric vehicle. It acts as a control power supply.

(2) DC charging pile

The DC charging pile, commonly known as "fast charging", is a power supply device that is fixed outside the electric vehicle and connected to the AC power grid, and can provide DC power for the power battery of the off board electric vehicle. It can directly output DC to charge the battery of electric vehicle. The output voltage and current can be adjusted in a wide range, which can provide sufficient power to realize rapid charging of electric vehicle. The DC charging pile has a fast charging speed, so it is generally installed in the charging station beside the expressway.

(3) AC/DC integrated charging pile

The fast charging pile equipment adopts the structure of AC and DC integration. It can realize both DC charging and AC charging. When there are many charging services in the daytime, DC mode is used for fast charging, and AC charging can be used for slow charging when there are few users in the charging station at night. The touch screen and keyboard are designed to be rain proof and dust-proof; Emergency stop switch with emergency stop; The charging connector placement slot is provided, which is waterproof.

2. By installation site

(1) Public Charge Point. Build charging piles in public parking lots combined with parking spaces to provide charging services for social vehicles

(2) Dedicated Charge Point. The construction unit has its own parking lot, which is a charging pile used by internal personnel of the unit.

(3) Self use charging pile. It is built in the private garage to provide charging piles for private users. The above describes different types of charging piles in different ways. Now we mainly introduce the characteristics of charging piles divided according to charging methods.

2、 Characteristics of Charge Point

1. Characteristics of AC charging pile

(1) The AC charging pile has simple structure and small pile body. The input side only needs to be connected from the power grid. The output is also AC, with low cost and more convenient installation. It is suitable for installation in residential area and unit parking lot.

(2) The power of AC charging pile is generally small and the charging speed is relatively slow. After an electric vehicle is fully discharged, it usually takes about 8 hours to charge through the AC charging pile.

(3) Protection function. The AC charging pile shall comply with IP54 (outdoor) and be equipped with rain proof and sun proof devices to protect the charging pile from rain. The shell door of the charging pile is equipped with an anti-theft lock. The bolts used to fix the AC charging pile must be installed or removed after the shell door is opened. The iron shell of the charging pile and exposed iron supports and parts shall be provided with double-layer rust prevention measures, and the non-ferrous metal shell shall be provided with oxidation protection film or be provided with oxidation prevention treatment;

2. Characteristics of DC charging pile

(1) The DC charging pile is larger than the AC charging pile because there are a certain number of power modules inside the DC charging pile. The higher the power, the more modules, and the larger the pile. Suitable for installation in public areas.

(2) The DC charging pile can monitor the status of the battery, and automatically adjust the charging current and voltage according to the battery temperature, voltage versus charging curve.

(3) Each DC charging pile is equipped with an operator for the user to select charging mode and guide operation, and display the battery status of electric vehicles and the user's IC card charge information to realize unmanned management;

(4) The DC charging pile can judge whether the charging connector and charging cable are correctly connected. The charger is allowed to start charging only after the connection is correct. If the connection is abnormal, the charging can be stopped immediately and an alarm message will be sent.

(5) The DC charging pile is suitable for the special bus charging pile. Because of the working nature of the bus, the 200-350kw high-power DC charging pile is generally used. When the bus comes back after a trip, the driver takes a 10-15 minute break to recharge the vehicle.

3. AC/DC integrated charging pile

(1) Provide human-computer interaction; Provide DC and AC charging interfaces;

(2) Real time communication with BMS to obtain power battery type, single voltage, residual capacity, temperature, alarm and other information;

(3) Complete safety protection control logic such as connection state judgment, interlocking, control guidance of charging interface;

(4) With CAN2.0B and RS485 communication interfaces, it can communicate with centralized monitoring and submit charging status information;

(5) It has the protection functions of electric leakage, short circuit, overvoltage, undervoltage, overcurrent, etc. to ensure the safe and reliable operation of the charging pile (plug); The protection grade is IP54.

The construction of charging pile is a reassurance to consumers, and it has a certain advance for the development of new energy vehicles. The industry is still in the transformation period of technology, market and profit model, and risks and opportunities coexist. How to take advantage of the "new infrastructure" and walk in the forefront of the eight development trends of the charging pile industry has become the key to the development of charging pile enterprises.