Working Principle and Trouble Shooting of DC fast Charging Station

Working Principle and Trouble Shooting of DC fast Charging Station

With the popularization of new energy vehicles, DC charging stations have been widely used as an important charging device. DC charging stations can provide fast and efficient charging services for new energy vehicles, thus attracting much attention. This article will introduce the working principle and common fault analysis of DC charging piles.

1、 Working principle of DC charging station

A DC charging station is a device that convertsAC electricity into DC electricity, and its working principle is as follows:

1.1. Input AC power: The input end of the DC charging station is connected to AC power, which is reduced by a transformer and 3.rectified by a rectifier to become DC power.

1.2. Control System: The DC charging station has an internal control system that can control the charging process, including adjusting parameters such as charging current, charging voltage, and charging time.

1.3. Output DC power: The output end of the DC charging station is a set of electrolyzers, which output DC power to the battery of new energy vehicles through electrolysis.

1.4. Charging interface: The output end of the DC charging station is also equipped with a charging interface, which can be connected to the charging cable of new energy vehicles.

2、 Common Fault Analysis of DC Charging Stations

2.1. Insufficient charging current: The charging current of the DC charging pile is insufficient, which may be caused by damage to the electrolytic capacitor inside the charging pile, increased electrolytic resistance, rectifier bridge failure, and other reasons.

2.2 Unstable charging voltage: The charging voltage of the DC charging station is unstable, which may be caused by internal voltage regulator failure, poor contact of the charging line, short circuit of the charging line, and other reasons.

2.3. Long charging time: The charging time of the DC charging station is too long, which may be caused by internal control system faults, excessive charging current, low charging voltage, and other reasons.

2.4. Poor contact of charging interface: Poor contact of the charging interface of the DC charging station may be caused by loose or damaged charging cable interfaces.

2.5. Charging Station Cannot Charge: The DC charging station cannot charge, which may be caused by internal control system failure, power failure inside the charging station, or damage to the electrolytic capacitor inside the charging station.

3、 Maintenance and daily check of DC charging stations

In order to ensure the normal operation of the DC charging station, regular maintenance and upkeep are required. Maintenance and upkeep include the following aspects:

3.1. Cleaning: Regularly clean the DC charging station, including the external and internal cleaning of the charging station.

3.2. Inspection: Regularly inspect the DC charging pile, including the inspection of components such as electrolytic capacitors, electrolytic resistors, and rectifier bridges inside the charging pile.

3.3. Replacement: Regularly replace damaged components inside the DC charging station, including electrolytic capacitors, electrolytic resistors, rectifier bridge stacks, and other components.

3.4. Calibration: Regularly calibrate the DC charging station, including the calibration of parameters such as charging current, charging voltage, and charging time.