What is the difference between an electric car charging station and an electric car charging station?

An electric vehicle charging station is a site for charging electric vehicles. With the popularity of electric vehicles, electric vehicle charging stations will become the focus of the automotive industry and energy industry development. Electric vehicle charging station can better solve the problem of fast charging, energy saving and emission reduction.

Electric vehicle charging station charging method

Regular charging:

1 Scale of a typical conventional charging station

According to the current data of conventional electric vehicle charging, a charging station is generally configured with 20 to 40 electric vehicles. This configuration is considered to fully utilize the evening valley electricity for charging, and the disadvantage is that the utilization rate of the charging device is low. When charging is also considered at the peak, 60-80 electric motors can be used to prepare a charging station. The disadvantage is that the charging cost increases and the peak load is increased.

2 Typical configuration of the power station of the charging station (provided that the charging cabinet has harmonic processing functions)

a program:

Construction of the substation design 2 road 10KV cable entry line (with 3 * 70mm cable), 2 sets of 500KVA transformer, 24 way 380V outlet. The second way is the special charging line for fast charging (with 4*120mm cable, 50M long, 4 loop), the second way is mechanical charging or spare outlet, and the rest is regular charging outlet (with 4*70mm cable, 50M long, 20 loop)

Scheme b:

Design 2 road 10KV cable (with 3*70mm cable), set 2 sets of 500KVA user box change, each box is equipped with 4 channels 380V outlet (with 4*240mm cable, 20M long, 8 loop), set one for each outlet The 4-circuit cable branch box supplies power to the charging cabinet (with 4*70mm cable, 50M long, 24 loops).

fast charging:

1 Scale of a typical fast charging station

According to the current data of rapid charging of electric vehicles, a charging station is generally configured to charge eight electric vehicles at the same time.

2 Typical configuration of charging station power supply

a scheme, construction of substation design 2 road 10KV cable incoming line (with 3 * 70mm cable), 2 sets of 500KVA transformer, 10 way 380V outlet (with 4 * 120mm cable, 50M long, 10 loop).

b scheme, design 2 road 10KV cable (with 3*70mm cable), set 2 sets of 500KVA user box change, each box is equipped with 4 channels 380V outlet for charging station (with 4*120mm cable, 50M long, 8 loop ).

Mechanical charging:

1 mechanical charging station scale

Small mechanical charging stations can be combined with conventional charging station construction, and larger capacity transformers can be selected as needed. Large mechanical charging stations are generally equipped with a large mechanical charging station with 80~100 rechargeable batteries. It is mainly used in the taxi industry or battery rental industry. It can complete the charging of 400 batteries in one day without interruption.

2 Typical configuration of charging station power supply (large mechanical charging station)

2 road 10KV cable entry (with 3*240mm cable), 2 1600KVA transformers, 10 380V outlets (with 4*240mm cable, 50M long, 10 loops).

Portable charging:

1 Villa

With a three-phase four-wire meter, independent parking garage, you can use the existing residential power supply facilities, from the residential distribution box to put a 10mm2 or 16mm2 line to the dedicated socket of the garage to provide portable charging power.

2 General residence

It has a fixed centralized parking garage, and generally requires an underground parking garage (for charging safety considerations). It can be reconstructed by using the original power supply facilities of the residential area. It must be considered according to the existing load capacity of the residential area, including the load of the valley electricity. The specific plan should be determined according to the power supply facilities and schemes of the community and the building environment of the community.

The charging pile is similar in function to the tanker inside the gas station. It can be fixed on the ground or wall, installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential parking lots or charging stations. It can be based on different voltage levels. Charge all types of electric vehicles. The input end of the charging post is directly connected to the AC grid, and the output end is equipped with a charging plug for charging the electric vehicle. The charging pile generally provides two charging modes of conventional charging and fast charging. One can use a specific charging card to swipe the card on the human-computer interaction interface provided by the charging pile, and perform corresponding charging mode, charging time, cost data printing and the like. The charging pile display can display data such as charge amount, cost, and charging time.

Characteristics

1. The AC input is equipped with a leakage protection switch, which has overload protection, short circuit protection and leakage protection on the output side.

2, AC input configuration D-class lightning protection device, with anti-induction lightning, anti-operation over-voltage protection.

3, AC output configuration AC smart energy meter, you can carry out AC charging power metering.

4. Configure the touch screen operation interface. The charging mode can be set to auto-fill, press charge, charge according to the amount and charge according to time; the start mode can select to start charging immediately; the charging mode, time, power and cost information are displayed in real time during the process.

5. It has a running status indicator light bar, the yellow light is always on to indicate the charging stand “standby” state; the green light is always on to indicate the charging pile “charging” state; the red light is always on to indicate the charging pile “end” state, the red light flashes to indicate the charging pile "Exception" status. Includes interlock failure, circuit breaker trip (overload protection, short circuit protection or leakage protection).

6. Configure the RF card reader to support the IC card payment method, in accordance with the combination of “withholding fee and actual checkout”.

7. With perfect communication function, the charging pile intelligent controller obtains the measurement information of the smart energy meter through RS485, and completes the linkage control of charging and charging and charging process.

8, the charging interface is configured with the national standard connector socket.

Charging technology

Since the introduction of the first electric vehicle in the 19th century, rechargeable batteries have been used as their power source. For an electric car, battery charging equipment is one of the indispensable subsystems. Its function is to convert the electrical energy of the grid into the electrical energy of the electric vehicle's vehicle battery. There are different methods for classifying electric vehicle charging devices, which can be generally classified into in-vehicle charging devices and off-board charging devices.

The vehicle charging device refers to a device installed on an electric vehicle that uses a ground AC power grid and a vehicle power source to charge the battery pack, including a vehicle charger (Fig. 1-13), a vehicle charging generator set, and an operation energy recovery charging device. The AC power cable with plug is plugged directly into the charging socket of the electric car to charge the battery. The in-vehicle charging device usually uses a contact charger with a simple structure and convenient control, or an inductive charger. It is designed according to the type of vehicle battery, and it is highly targeted. The off-board charging device, that is, the ground charging device, mainly includes a dedicated charger, a dedicated charging station, a universal charger, a charging station for a public place (Fig. 1-14), and the like. It can meet a variety of charging methods for a variety of batteries. Generally, the power, volume and weight of the off-board charger are relatively large, so that it can adapt to various charging methods.

In addition, depending on the manner in which the energy is converted during charging of the electric vehicle battery, the charging device can be classified into a contact type and an inductive type. With the rapid development of power electronics technology and variable current control technology, the high-precision controllable converter technology is mature and popularized. The phase-by-stage constant current charging mode has been basically replaced by the constant voltage current-limiting charging mode in which the charging current and charging voltage are continuously changed. . The dominant charging process is also a constant voltage current limiting charging mode. The biggest problem with contact charging is its safety and versatility. In order to meet the strict safety charging standards, many measures must be taken on the circuit to enable the charging device to be safely charged in various environments. Constant voltage current limiting charging and phased constant current charging are contact charging technologies.

The new type of induction charging technology for electric vehicles is developing rapidly. The inductive charger is a transformer principle that uses a high-frequency alternating magnetic field to sense the electric energy from the original side of the vehicle to the secondary side of the vehicle to achieve the purpose of charging the battery. The biggest advantage of inductive charging is safety. This is because there is no direct point contact between the charger and the vehicle. Even if the vehicle is exposed to harsh weather, such as rain or snow, there is no danger of charging.

An electric car charging station is a site that charges an electric car, similar to a current gas station. The charging station can be divided into four sub-modules according to functions: power distribution system, charging system, battery scheduling system, and charging station monitoring system. Charging stations charge cars in three ways: normal charging, fast charging, and battery replacement. Ordinary charging is mostly AC charging, and 220V or 380V can be used. Fast charging is mostly DC charging. The main equipment of the charging station includes a charging machine, a charging pile, an active filtering device, and a power monitoring system.

Electric vehicle charging piles and charging stations are two concepts. The electric vehicle charging pile is fixed on the ground, and the special charging interface is used to conduct the alternating electric energy for the electric vehicle with the vehicle charging device, and has the corresponding communication, charging and safety protection functions. The public only needs to purchase an IC card and recharge it, so they can use the charging pile to charge the car.