【Principle of Ev charging station】 Difference between DC Ev charging station and AC Ev charging stationEv charging station supplier-Besen

Besen -Ev charging station manufacturers

【Principle of Ev charging station】 Difference between DC Ev charging station and AC Ev charging station Electric energy, with corresponding communication, billing and security protection functions. Citizens only need to buy an IC card and recharge, then they can use the Ev charging station to charge the car. After the battery of the electric vehicle is discharged, direct current is used to pass through the battery in the opposite direction to the discharge current to restore its working capacity. This process is called battery charging.

When charging the battery, the positive pole of the battery is connected to the positive pole of the power supply, and the negative pole of the battery is connected to the negative pole of the power supply. The charging power supply voltage must be higher than the total electromotive force of the battery. 2. Ev charging station charging mode There are two charging modes: constant current charging and constant voltage charging. This image is created by registered users" line•"Photo" provided, copyright statement Feedback constant current charging method Constant current charging method is a charging method that maintains the same charging current intensity by adjusting the output voltage of the charging device or changing the resistance in series with the battery.

The control method is simple, but because the acceptable current capability of the battery gradually decreases with the charging process, in the later stage of charging, the charging current is mostly used for electrolyzing water, generating gas, and causing excessive gas output. Therefore, the stage charging method is often used. Constant voltage charging method The voltage of the charging power supply keeps a constant value during the whole charging time, and the current gradually decreases with the gradual increase of the battery terminal voltage. Compared with the constant current charging method, the charging process is closer to the optimal charging curve.

With constant voltage fast charging, since the battery electromotive force is low in the early stage of charging, the charging current is large, and as the charging progresses, the current will gradually decrease, so only a simple control system is required. 3. The difference between DC Ev charging station and AC Ev charging station DC Ev charging station: DC Ev charging station, commonly known as "fast charging", it is fixedly installed outside the electric vehicle, connected to the AC power grid, and can be used for off-board electric vehicles. The automotive power battery provides a DC power supply device. The input voltage of the DC Ev charging station adopts three-phase four-wire AC380V±15%, the frequency is 50Hz, and the output is adjustable direct current, which directly charges the power battery of the electric vehicle.

Since the DC Ev charging station adopts a three-phase four-wire system for power supply, it can provide enough power, and the output voltage and current can be adjusted in a wide range, which can meet the requirements of fast charging. AC Ev charging station: AC Ev charging station, commonly known as "slow charging", is fixedly installed outside the electric vehicle and connected to the AC power grid to provide AC power for the electric vehicle on-board charger (that is, the charger that is fixedly installed on the electric vehicle). power supply device. The AC Ev charging station only provides power output and has no charging function. It needs to be connected to the car charger as the Ev charging station.

It is equivalent to just playing the role of a control power supply. The difference between the two: In simple terms, the AC Ev charging station needs to be charged with the help of an on-board charger, and the DC fast Ev charging station does not need this equipment. There is a big difference in the charging speed between the two. After a pure electric vehicle (common battery capacity) is fully discharged, it takes 8 hours to be fully charged through the AC Ev charging station, while it only takes 2 to 3 hours through the DC fast Ev charging station.

The AC Ev charging station provides power input to the charger of the electric vehicle. Since the power of the on-board charger is not large, fast charging cannot be achieved. The DC fast Ev charging station is a power supply device that is fixedly installed outside the electric vehicle and connected to the AC power grid, and can provide DC power for the power battery of the non-vehicle electric vehicle. The DC Ev charging station can provide sufficient power, and the output voltage and current can be adjusted. The range is large, which can meet the requirements of fast charging.