Among new energy vehicles, electric vehicles are the mainstream products. The energy supply system of electric vehicle includes motor, power battery and management system. As the main supply equipment of automotive energy, power battery can not only maintain the rapid operation of the vehicle, but also quickly charge the vehicle. Therefore, it is the core component of electric new energy vehicles. However, since the power system of electric vehicles is composed of batteries, including nickel hydrogen batteries, fuel cells, large lithium batteries and lead-acid batteries, the maintenance of the power system of electric vehicles is mainly aimed at these four types of battery equipment. However, this is also New energy vehicle charging pile The main reasons for the improvement of professional maintenance level.

Due to the lack of understanding of the application technology of power battery in most automobile maintenance industries, it is impossible to effectively eliminate faults during the maintenance process. Therefore, new technologies must be applied to meet the maintenance needs of new energy vehicles. The maintenance concept of the electric vehicle industry should be updated to ensure the use efficiency of new energy and improve the diagnosis and maintenance level of electric vehicles, so as to effectively solve such problems. During the charging process, the battery equipment of the electric vehicle needs a certain ambient temperature guarantee. If charging is carried out when the engine temperature is low, the battery must be charged immediately after the vehicle stops driving to ensure that the battery is not damaged. If the battery fails due to low temperature, the traditional diagnostic technology can not judge the fault problem, and can only check the fault through electronic diagnostic technology to draw correct conclusions.

The electronic system plays an intelligent control role in the driving process of new energy vehicles. Due to the complexity of the circuit system of new energy vehicles, the maintenance needs higher technology. Once the circuit system fails, the new energy vehicle will not be able to run and drive normally. Therefore, the maintenance ability of the circuit system must be strengthened to ensure the normal operation of new energy vehicles. Compared with traditional vehicles, new energy vehicles have more power system storage space and more electric vehicle maintenance electronic components, so they are prone to circuit failure.

When using electronic diagnostic technology to judge the fault of the braking system of new energy vehicles, first read the fault information, observe whether the ABS lamp is on after the vehicle starts, and then observe whether the ABS warning lamp will go out during operation. If the warning lamp does not go out, it indicates that the ABS system is faulty. Another judgment method is to timely check the fuse of the vehicle power system after the normal flameout when the new energy vehicle is running normally. By spelling the flashing times of the warning light, you can also accurately obtain the vehicle fault code, so as to accurately judge the vehicle fault and ensure the maintenance quality. In the electronic diagnostic system, the fault information can be cleared. During vehicle self inspection, braking operation is not allowed, otherwise the diagnosis result will be invalid.