Communication fault handling with the vehicle when the electric vehicle charger is in use

When an electric vehicle charger fails to communicate with the vehicle during use, it can be handled by checking the hardware connection, restarting the device, updating the software firmware, detecting communication signals and lines, troubleshooting electromagnetic interference, and seeking professional support. The following are the specific instructions:

Check the hardware connection:

Confirm whether the charging interface and cable are correctly connected to the charging pile and the car. Check if the interface is loose or damaged and if the cable is damaged. If loose interfaces or damaged cables are found, they need to be repaired or replaced.

Check whether the conductive rings at each terminal of the fast charging interface have fallen off, whether the fast charging interface and the fast charging gun are in good condition, and whether there is any burning or rusting.

Restart the device

Restart the charging station and the vehicle, and try to re-establish the connection. This is helpful for solving communication problems caused by temporary equipment malfunctions.

Update software and firmware:

Some electric vehicles and charging piles may need to update their software or firmware to solve communication problems. You can contact the vehicle manufacturer or the charging pile supplier to obtain the updated information and carry out the corresponding update operation.

Detect communication signals and lines:

Ensure that the communication protocol between the charging pile and the vehicle is consistent, and use the corresponding charging port and charging cable.

Check the grounding condition of the fast charging interface. If Terminal 8 of the fast charging interface is poorly connected to the vehicle body, it may cause problems such as the charging pile being unable to operate or communicate with the vehicle. It is necessary to measure the resistance value between Terminal 8 of the fast charging interface and the negative terminal of the vehicle body, which should be less than 0.5Ω. If the resistance value does not match, it may be caused by reasons such as loose bolts, rusting of the contact surface, or incomplete cleaning of the paint at the thread. If Terminal 8 and the ground wire terminal are not conducting at all, the wiring harness of the fast charging interface should be replaced.

Measure the resistance values between the relevant terminals of the fast charging interface, such as whether the resistance value between terminals 4 and 7 is 1000±50Ω. If the resistance value does not match the standard value, replace the fast charging wiring harness.

Check the wake-up signal, connect the vehicle to the fast charging pile properly, and test whether the charging wake-up signal is normal. If the instrument does not show "wake-up", first measure the relevant fuse in the low-voltage electrical box of the front engine compartment. If it blows, check the circuit, replace the fuse and conduct a test. If the fuse is normal, use a multimeter to measure whether the fuse has a fast charging wake-up voltage. If there is no voltage, the charging gun should be disconnected. With the ignition switch turned off, check whether the terminals of the fast charging harness have any loose pins, rust, or poor contact. If any problems are found, they should be repaired. If there is no problem with the terminals of the wiring harness, measure whether the relevant terminals of the fast charging interface are conducting. If they are not conducting, replace the fast charging wiring harness. If they are conducting, continue to measure whether the other related terminals are conducting.

Troubleshoot electromagnetic interference:

There may be other electronic devices around that generate electromagnetic interference, affecting the communication between the charging pile and the vehicle. Try to stay away from other electronic devices or move the charging pile to a place free from interference.

Check the power supply problem:

Check whether the power cord of the charging pile is properly plugged in and whether the power socket is working properly. If possible, try replacing the power socket.

Seek professional support

If none of the above methods can solve the problem, it is recommended to contact the charging pile supplier or the vehicle manufacturer for professional assistance. They can provide more detailed technical support and maintenance services.