How to conduct regular inspections of electric vehicle chargers

Regular inspection of electric vehicle chargers is an important measure to ensure charging safety, extend the service life of chargers and guarantee the normal charging of vehicles. The following are the detailed steps and key points for regularly inspecting electric vehicle chargers:

First, visual inspection

Check the shell

Check whether the charger casing is damaged, cracked or deformed. The integrity of the casing is crucial for preventing damage to internal components and electric shock. If any damage to the casing is found, stop using it immediately and contact professional maintenance personnel for replacement.

Check whether the markings on the casing are clear, including manufacturer information, model, rated voltage and current, etc. This information is helpful for understanding the specifications and performance of the charger.

Check the plugs and sockets

Check whether there is oxidation, corrosion or loosening at the contact parts of the plug and socket. Oxidation and corrosion may lead to poor contact, affect charging efficiency, and even cause safety hazards.

Ensure the compatibility of plugs and sockets and avoid charging with incompatible plugs and sockets.

Check the cable

Check whether the charging cable is damaged, exposed or aged. The damage of cables may lead to leakage or short circuit, posing a threat to personal safety.

Gently bend the cable and check for any internal fractures or poor contact. If any problem with the cable is found, it should be replaced immediately.

Second, functional check

Test the charging function

In a safe environment, connect the charger to the electric vehicle and the power supply, and observe whether the charging indicator light is on normally.

Monitor the changes in current and voltage during the charging process to ensure they are within the normal range. If any abnormal current or voltage is detected, charging should be stopped immediately and the charger and vehicle should be checked for any faults.

Check the protection function

Electric vehicle chargers usually have functions such as overcharge protection, over-discharge protection and short-circuit protection. These protection functions can be tested for normal operation by simulating fault conditions (such as short circuits).

If the protection function fails, the charger may continue to work under abnormal conditions, leading to equipment damage or causing safety accidents.

Third, electrical performance inspection

Insulation resistance test

Use an insulation resistance tester to measure the insulation resistance of the charger to ensure it meets safety standards. Too low insulation resistance may lead to leakage of electricity, posing a threat to personal safety.

Grounding resistance test

Check the grounding resistance of the charger to ensure it meets safety requirements. Good grounding can effectively direct leakage current into the ground, protecting personal safety.

Fourth, environmental adaptability inspection

Check the heat dissipation situation

Observe whether there is any abnormal heating phenomenon during the operation of the charger. If the charger overheats, it may affect its performance and lifespan.

Make sure the heat dissipation holes of the charger are not blocked so that the heat can be dissipated in time.

Check the waterproof and dustproof performance

If the charger needs to be used outdoors, it is necessary to check whether its waterproof and dustproof performance is good. Insufficient water and dust resistance may cause damage to the internal components of the charger.

Fifth, regular maintenance and upkeep

Clean the charger

Regularly wipe the charger's casing and plug with a dry soft cloth to remove dust and dirt. Avoid using damp cloths or chemical cleaners to prevent damage to the charger.

Storage environment

Store the charger in a dry, well-ventilated environment free of corrosive gases. Avoid exposing the charger to high temperatures, humidity or direct sunlight.

Follow the manufacturer's advice

Read the user manual of the charger carefully to understand the regular inspection and maintenance suggestions provided by the manufacturer. Operating in accordance with the manufacturer's instructions can ensure the performance and safety of the charger.

Sixth, professional maintenance and replacement

Timely maintenance

If any problems or malfunctions of the charger are found during regular inspections, professional maintenance personnel should be contacted promptly for repair. Do not attempt to disassemble or repair the charger by yourself to avoid causing greater damage or safety hazards.

Replace in a timely manner

According to the service life and performance condition of the charger, consider replacing it with a new one in a timely manner. An aging charger may pose safety hazards and its charging efficiency may decrease.