The biggest difference between electric vehicles and traditional fuel vehicles is that the driving method changes from oil circuit to electric circuit. Therefore, if you want to extend the service life of your electric vehicle, it is very important to maintain the motor and battery.
Under normal circumstances, the maintenance items of electric vehicles include power battery system, air conditioning system, steering system, body part, cooling system, braking system, chassis part and charging system, a total of eight maintenance items.
Domestic electric vehicle brands usually focus on the vehicle's battery pack and high-voltage wiring harness. The quality of the high-voltage wiring harness is directly related to whether the vehicle can drive normally, and is also related to the safety of the driver and passengers. Therefore, the inspection of electric vehicle high-voltage wiring harness is the most important part of maintenance. Usually, when testing the high-voltage wire harness, the staff first separates the wire harness from the power controller, and then uses a multimeter to test one by one. If the test results are within the specifications, it is qualified. However, most car manufacturers have a 5-year warranty on high-voltage wiring harnesses, which requires our attention.
The battery is the most important component in an electric vehicle. The process of checking a battery pack is basically similar to troubleshooting a vehicle. The staff connects the vehicle to the computer through a data cable, and then uses professional software to clearly understand other information, such as battery power, voltage, CAN bus communication status, temperature, etc. If there is a problem with a single battery, it is likely to affect the working status of the entire battery pack.
Next, check the motor coolant and battery coolant. These two coolants are basically the same color as fuel engine coolant and are installed in the engine room container, usually pink or green.
Special attention should be paid to replacing the brake oil and transmission gear oil of electric vehicles every 2 years or 40,000 kilometers, and replacing the air conditioning coolant every 4 years or 100,000 kilometers. The organic acid coolant also needs to be replaced. Replacement criteria should be based on time or mileage, whichever comes first.
Regarding the maintenance cycle of new energy vehicles, the maintenance cycle is basically once a year or 20,000 kilometers (whichever comes first). As for the maintenance cost in China, it is generally 200~300 yuan/time. This is just the pure testing cost, excluding labor costs and the cost of replacing wearing parts.