At present, China's economic field has shifted from pursuing high-speed development to pursuing high-quality development, and the mode of sacrificing the environment for economic development has gradually been eliminated. This trend has had a profound impact on the development of many industries in China. In the automotive industry, the research, development and production of new energy vehicles with the theme of energy conservation and consumption reduction have gradually attracted more and more attention. It can be predicted that the share of new energy vehicles will be higher and higher in the future development of the automotive industry. Therefore, it is of positive significance to explore the fault and maintenance technology of new energy vehicles.

Both pure electric vehicles and hybrid vehicles need batteries. Even hydrogen powered and solar powered cars can convert energy into electricity and then into kinetic energy. Therefore, the battery is one of the key components of new energy vehicles that are most prone to failure. In combination with the actual operation of the vehicle, the main reasons for battery failure are as follows: First, excessive wear, such as excessive battery consumption due to poor working environment. Secondly, the failure of the management system will cause the battery to overcharge and damage its service life. The ignition coil is aged and worn under high temperature, resulting in short circuit fault. New energy vehicle charging pile The electronic components in the electronic control system have failed.

The control system plays a key role in the new energy vehicle system and has a decisive impact on the running state of the vehicle. At present, the common faults of the drive system mainly include mechanical faults, circuit faults, magnetic circuit faults, etc. Mechanical system fault and electrical system fault include insulation resistance fault, rotor winding fault, etc. Compared with ordinary vehicles, the rotor winding faults of new energy vehicles are more complex and require higher technical means of fault detection.

The common faults of new energy vehicles may be as follows. First, the vehicle fails to start normally. The possible causes of this situation are ignition system or oil circuit failure. Further judgment is required according to the vehicle stalling condition. If the road condition is bad, stalling indicates the ignition system. If the vehicle power is insufficient, it is an oil circuit fault. New energy vehicle maintenance Secondly, the starter cannot rotate or the speed is too low. To do this, it is necessary to check the battery connector, power supply and connector. A simple way to check the battery is to turn on the indoor light. If the light turns dark and goes out, it means that the comment is in a power off state at this time. Third, there was a problem when the starter started the engine without failure. In this case, first check whether the oil quantity is sufficient. If enough, continue to check the ignition system. If it is too wet, handle it in time. In addition, it is also necessary to reasonably control the amount of oil and gas to avoid too much oil and gas in the cylinder affecting the ignition.