The importance of charging pile maintenance

As charging piles continue to become more popular, charging pile maintenance is very important. Having better, faster, and more accurate maintenance skills is a must for maintenance workers.

There are roughly two types of charging piles that are more common in the charging pile market, which are defined in terms of charging speed and interface. One is DC fast charging and the other is AC slow charging. Most domestic operating stations allow customers to charge at any time. On-the-go, convenient and fast, easy to manage, etc. Most of them are fast charging stations. The power of a single gun can generally support 60KW to 80KW. The charging speed varies according to the battery life. It can be fully charged in a few hours. The higher the power, the higher the charging power. The speed is also faster. Most cars also have fast charging ports. The other is slow-charging piles, which are what we often call AC piles. Most of them are 3.5KW or 7KW. For use in homes and personal parking garages, the charging speed can take up to dozens of hours depending on the power and battery life.

So whether it is a fast charging pile or a slow charging pile, various factors always cause charging failure during the charging process. Next, I will briefly explain it to you using a fast-charging pile as an example.

Fast charging piles generally consist of a charging gun and a pile body, which in turn contains control switches, charging modules, control circuits, etc. When customers charge, in addition to the charging data that can be observed in real-time on the mobile APP, some data can be directly detected and observed on the charging station screen.

The picture below is a relatively common DC 120KW fast charging pile produced by Bluesky Energy Technology Co., Ltd. This pile was developed and designed by Lanning Technology.

bluesky DC charging pile

The main control of this pile is also precisely controlled by engineers. The entire main control is very highly integrated and quite stable. The screen interface is also very simple and practical.

The screen interface is roughly divided into system configuration, network settings, password settings, time settings, and debugging interface.

Charging pile screen interface

Next, the editor will take you to a general understanding of the analysis and troubleshooting of some common minor faults.

Here I will first share an actual on-site maintenance case for your reference and comparison.

The customer promised that it could not be charged during the charging process, but the charging stopped after a minute or two, and the screen showed that the electronic lock was faulty. When such a fault occurs, the customer is first asked to assist in remote troubleshooting. The specific operation is to let the customer enter the settings icon in the upper right corner of the screen, as shown below:

Charging pile screen setting interface

Enter the backend system through password confirmation, find the order record, and check the end reason for further judgment. When the order record was opened, it was found that the end reason was code 105. At this time, by comparing the fault code table, it was found that it was an electronic lock failure. This type of failure is also one of the more common failures in charging piles. The electronic lock is the safety device on the head of the charging gun. When the charging pile and the car interact with each other through the BMS to complete normal charging, the firearm cannot be pulled out. This is also the most important device for the safety of the charging pile. Only when charging is completed, the gun can be pulled out normally. When fault 105 is found and charging stops after a short period, we can confirm that it is caused by the system’s need to detect the car and pile failing to pass the electronic lock during the charging process, causing the gun to be locked.

At this time, we ask the customer to enter the debugging mode and test it by manually controlling the electronic lock to determine where the problem lies.

Enter the debugging mode interface, manually control the electronic locks of gun A and gun B, and control the two guns AB by clicking on the screen. It is found that gun A also makes a “dong dong” sound when the electronic lock of gun A is controlled. This sound comes from It is transmitted from the gun head, and the feedback port also changes, and will change from the original “1” to “0”. When I control the B gun again, I find that there is no sound, and the feedback has not changed. At this time we can roughly confirm that there is indeed a problem with the electronic lock. Because the customer did not have maintenance tools and a multimeter, he could not make further accurate judgments. At this time, the customer visually inspected the uncontrollable B gun and found that the end of the electronic lock control guide rod at the rear of the gun was slightly dirty. At this time, let the customer use the unlocking device that comes with the gun, that is, simply move and slightly touch the guide rod, and then go to the screen to perform the same control test and find that the sound is there. At this time, communicated with the customer We learned that because the weather has been raining recently, the charging pile was not equipped with a canopy, and the charging gun failed to reset to the charging base in time several times, it was thrown to the ground and soaked in the rain. Although the charging pile is rainproof and waterproof, we also Developed good charging habits to extend the service life of charging piles. How important it is to develop good charging habits. Through this experience, customers also realized the importance of awnings. They decided to install awnings in the future and put up warm reminders for charging.

Through this simple troubleshooting, we realized that developing good charging habits and maintaining charging piles are also issues that cannot be ignored!

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