Oil electric hybrid and pure electric new energy vehicles are widely used in China, effectively reducing vehicle exhaust pollution, but new requirements are put forward for maintenance work, and New energy vehicle maintenance The analysis and discussion of technology is of great significance.
1、 Technical complexity of new energy vehicles
New Energy Automobile
When developing new energy vehicles, people fully integrate electronic technology, information technology, automobile manufacturing technology, energy science and other contents, and promote the driving and control of new energy vehicles to become more intelligent.
For example, drive and drive control technology, because pure electric vehicles are the use and development direction of new energy vehicles, in order to promote new energy vehicles to reach the standard of pure electric vehicles, we must use powerful and reliable motors, and use new motor control technologies, including direct torque control, vector control and other technologies, reflecting the technical complexity.
However, just because the body structure of new energy vehicles contains a large number of circuit structures and electronic components, New energy vehicle charging pile Vehicle maintenance personnel are required to face more complex technical structures when maintaining new energy vehicles, which increases the difficulty of troubleshooting new energy vehicles. At the same time, in order to realize the diversified kinetic energy of new energy vehicles, their parts also have greater complexity and high scientific and technological content. In the process of vehicle driving, these high-precision parts are used more frequently, easily damaged, and have a greater probability of failure. However, precision components are inherently very complex, leading to the increasingly diversified failures of new energy vehicles. Only by continuously improving the level of maintenance technology can we meet the maintenance requirements of new energy vehicles and improve the troubleshooting rate.
2、 Key points of new energy vehicle maintenance technology
New Energy Automobile
（1） Maintenance Technology of Hybrid Vehicle
The fuel electric hybrid vehicle is used for power generation after crude refining fuel, which transmits power to the internal power battery pack of the vehicle, and runs on fuel. However, the effect of energy conservation and emission reduction can be achieved by electric power cooperation when starting or at low speed. Compared with the fuel models of the same model or vehicles of the same class, the fuel volume of hybrid vehicles has significantly decreased.
The common small faults of hybrid electric vehicles mainly include ignition system fault, oil circuit system fault and circuit fault. Battery failure and abnormal operation of generator are common large-scale failures. Small faults are almost the same as the traditional vehicle maintenance technology, and the maintenance of large faults is the key.
For example, when the oil electric hybrid vehicle cannot be started normally, check whether the starter and generator are abnormal, because long-term use may lead to damage or aging of the engine and generator, loose plug and other phenomena, Electric vehicle charging pile The technology used shall be determined according to the actual situation during maintenance. The battery detection technology can also be used to check whether the battery of the hybrid electric vehicle has oxidation, power loss, loose joints, etc. If there is any, the oxide of the battery must be cleaned in time, and the battery must be charged or replaced in time.
（2） Maintenance technology of pure electric vehicle
Although oil electric hybrid vehicles are more popular at present, pure electric vehicles are always the development trend of new energy vehicles. Pure electric vehicles use household slow charging or DC pile fast charging to supplement power for vehicles. The battery is its power source, which is also the focus of maintenance.
When repairing battery of pure electric vehicle, prevent battery from power loss due to storage. For new energy vehicle maintenance, for example, when the battery is not in use, the battery should also be charged regularly to keep the battery in good condition and avoid power loss; The periodic detection technology is used to repair the battery. If the endurance of the pure electric vehicle is weakened during the use process, it is most likely because of the battery. Regular inspection must be carried out to ensure the normal use of the battery and ensure the normal driving of the pure electric vehicle.
