What are the key technologies and optimization countermeasures for new energy vehicle maintenance?

First, the key technology of motor fault repair

The failure of the motor drive system of new energy vehicles is one of the common faults, including circuit system failures, mechanical system failures and magnetic circuit system failures, which have a great impact on the operation of the drive system of new energy vehicles. Therefore, it is particularly important to diagnose and troubleshoot these faults. It can judge whether the motor is running normally by the degree of bearing wear or whether the rotor hole is collided, judge whether there is abnormal noise, and check the position of mechanical parts at the same time.

Second, the maintenance of motor overspeed fault

When the motor has an overspeed fault, first analyze the cause of the failure, generally due to the sudden drop in vehicle load caused by the torque runaway fault, the main method is to energize. If it is found that the fault is caused by the loose plug of the low-voltage signal line, you can diagnose it by checking the plug of the low-voltage signal line, and if the hardware equipment such as the controller is found to be damaged during the inspection, please replace it with new hardware.

3. The operating temperature is too high

The working temperature of the drive motor of new energy vehicles should not be too high. When the temperature exceeds 120, the power drops. When the temperature exceeds 140, the motor stops working. The solution to this problem is to replace the motor.

Fourth, the parser is faulty

If the drive motor starts abnormally or the output torque is small after starting, it is a transformer fault problem. Therefore, a multimeter should be used to detect the windings on both sides of the transformer. When the resistance is large, the transformer is damaged and needs to be replaced.

When the detected value is within the normal range, the solution is to replace the main control board.

Fifth, the motor phase loss

When the drive motor of the vehicle runs abnormally, such as vibration, heat, excessive noise, etc., the motor will be out of phase, which can be regarded as the excitation fault caused by the damage of the motor hall element. Therefore, it is very important to check the output resistance, do a good job of grounding and power supply of Hall elements, and compare and judge the specific fault location and degree of Hall elements, so as to accurately perceive and detect the changes of Hall elements.

These optimization countermeasures are to optimize the maintenance process, the development process, the maintenance technology, the maintenance time, and the integrity of the maintenance.

Strengthen the learning of maintenance technical knowledge, improve the professional quality of maintenance personnel, learn more professional technology, conduct comprehensive analysis and dissection of new energy vehicles, adopt more professional maintenance tools, and adopt more advanced technical techniques.

The core technology is the battery maintenance technology of the car, the battery control technology of the car, the battery life adjustment technology of the battery, and the installation technology of charging. The problems that need to be paid attention to are, charging, battery life, networking, and vehicle-machine interaction.

Engine maintenance, automotive battery maintenance, automotive pipeline maintenance, automobile testing, automotive central control inspection and maintenance; It should be noted that new energy vehicles have certain differences from traditional cars, and the corresponding maintenance technology should be improved during maintenance to ensure the service life of the car.

It's important and promising.

The new energy track section of the steam combustion hall car refers to the use of unconventional vehicle fuel as the power, the integration of advanced technology in the power control and drive of the vehicle, the formation of advanced technical principles, with new technologies, new structure of the car. New energy vehicles include four major types of hybrid electric vehicles, pure electric vehicles, fuel cell electric vehicles, and other new energy vehicles.

1.Cultivate high-quality technical and skilled talents with good professional ethics, master the basic theories and professional knowledge necessary for the application of new energy vehicle technology, and be able to engage in the assembly and commissioning, performance testing, maintenance and technical management of new energy vehicles.

2.Main learning: new energy vehicle structure, electrical and electronic technology, automotive electronic control technology, electric vehicles, power batteries and drive motors, automotive new energy and energy-saving technology, automobile testing and fault diagnosis, etc.

3.The selection of schools can be compared from the following aspects, qualifications, and whether there is a school license approved by the first department.

Whether the equipment is complete and whether it is really used for practical training.

management, whether the safety management of campus guards is strict, students are civilized and polite, campus environmental hygiene, etc.

strength, the number of teachers, the level of education, practical experience, teaching level, etc.

Process, observe the order of the class, the state of the students, whether the students are doing the operation, and whether the operation process is standardized.

In order to raise the environmental awareness of the former Tongsheng people, April 22 is designated as World Earth Day every year, calling on the people to pay attention to environmental protection issues. Among the many environmental problems, automobile exhaust is an important cause of these environmental problems.

At present, the fuel vehicle maintenance industry has been fully staffed. New energy vehicles mountain lead is the direction of future development, will appear in large quantities. Therefore, it is appropriate to enter the new energy vehicle maintenance and amuse wheel.

Is automotive new energy technology important in the auto maintenance industry? With the increase of environmental protection, new energy vehicles will become the mainstream in the future.

The "new" of new energy vehicles is also reflected in the power of the power, abandoning the previous gasoline and other polluting power generation power, the application of cleaner renewable energy, such as solar energy, hydrogen energy and other new energy sources in the car to conversion, and finally form kinetic energy to promote the operation of the car. As a power battery that stores internal energy and converts kinetic energy internally to power the car, it is a key component of the whole vehicle.

Therefore, whether the state of the power battery is normal or not plays a decisive role in whether the car can operate normally. In the actual vehicle carrying and use process, as a power battery component with more pressure, the failure rate is higher. After investigation and analysis, it was found that the failure of power batteries was mainly concentrated in the following aspects.

First of all, the new energy vehicle that controls the car through the electronic system, the workload is more cumbersome and complex, resulting in electronic components relative to other mechanical components, not only the probability of failure is high, but also because it is a relatively new technology and technical parts, if it is damaged, the manpower, material and financial resources required for overhaul are more than conventional components.

Secondly, the car runs for a long time with high intensity, and the factors of poor working environment and excessive consumption can easily cause damage to the power battery, shorten the service life of the battery, and cause labor failure. Then, in the process of operation, the high temperature caused by repeated friction of the components causes the insulation layer outside the ignition coil of the starting device component in the internal system of the automobile to be very prone to aging at high temperatures, friction damage and softening, resulting in current leakage or short circuit under high voltage.

Finally, in the process of car use, the power rush and release are used frequently, which can easily lead to the operation disorder of the management system and seriously affect the service life of the battery. In addition, due to the inconsistency between the battery life and the design of the new energy vehicle's sailing range, it cannot meet the required requirements in the implementation process, and the battery will fail due to high-load operation.

The drive system mainly uses switched reluctance motors and permanent magnet synchronous motors. Due to its sensorless control technology and the emergence of new alternative materials, permanent magnet motors have higher operating efficiency and more abundant vector control methods, and are widely used in new energy electric vehicles. In addition, when a new energy vehicle fails and needs to be repaired, it takes a long time to analyze, judge and operate because the work is more complex and cumbersome and difficult.

Therefore, in order to shorten the maintenance operation time, a more reasonable electronic diagnostic technology should be selected for maintenance, which can be optimized on the basis of satisfying the maintenance, and the sequence of maintenance can be optimized, so as to promote the work efficiency can be improved.

In addition, the objective electronic maintenance data can also be collected, which helps to carry out timely and effective maintenance without disassembling the car, so as to find the fault faster, and the application of advanced instruments and equipment can provide good help for diagnosing the fault, such as computer test equipment, special instruments, etc.

It is electronic circuit technology, because new energy vehicles use electricity as the drive, which is different from the previous oil circuit system, so the key to the maintenance of the battery and drive system is to master the electronic circuit technology.

At present, the key technology of maintenance is to test the battery, repair the battery, change the maintenance method of the battery, and find the problems of the mobile system through the battery.

The key lies in the maturity of the motor board connection technology of the battery, as well as the improvement of the battery storage capacity, the increase of battery discharge efficiency, and the enhancement of the power source of new energy vehicles.

The key technologies are power battery failure, system failure, failure to get on high voltage, high voltage disconnection, low SOC and other faults.

At this stage, in the traditional automobile maintenance industry, due to the large differences in personnel skills and quality, there are many problems in daily management, such as customer service, maintenance time and price, etc., which will affect customer satisfaction.

Therefore, in the process of development of the traditional automobile maintenance industry, we should focus on strengthening the rectification of the automobile maintenance industry, in view of the problems existing in the industry, on the one hand, strengthen the management of maintenance personnel, emphasize the importance of customer satisfaction, so that maintenance personnel can establish the concept of customer service, and do a good job in daily work, on the other hand, comprehensively optimize the industry structure, and do a good job of meticulous work at all stages of customer maintenance, so as to effectively promote the sustainable development of the maintenance industry.

Improving the professional skills of maintenance personnel is to break through the bottleneck of the development of the traditional automobile maintenance industry. Due to the complex structure of the car, once the problem is not dealt with in time, it is very likely to cause safety accidents, so the maintenance personnel should have professional maintenance skills, and in-depth learning of maintenance technology, with the development of automobile technology to update the maintenance technology.

In addition, the automobile maintenance industry should pay attention to the cultivation of talents, strengthen the construction of the maintenance team, on the one hand, improve the technical literacy of maintenance personnel, on the other hand, pay attention to the assessment of maintenance personnel, especially in the personnel learning stage, establish a comprehensive growth system of learning and practice, so that technical personnel start from the students, lay a good foundation for maintenance technology, and exercise practical skills in actual maintenance, so as to improve their own maintenance level and establish their own image in the maintenance industry, so as to attract more customers to establish cooperative relations. Promote the sustainable development of the maintenance industry.

Affected by the development of new energy vehicles, traditional auto parts into the period of upgrading, maintenance personnel in the update of the original technology and concept at the same time, should also update and improve the maintenance equipment, and pay attention to the research of new equipment, and strive to fully grasp the performance of maintenance equipment and other parameters, in the efficient use of maintenance equipment in automobile maintenance, improve maintenance efficiency.

In addition, the maintenance industry should increase the training of maintenance equipment, so that more maintenance personnel can learn professional knowledge in order to meet the development needs of the maintenance industry. The maintenance industry should also broaden the scope of business, introduce new energy vehicle maintenance tools, and cooperate with the professional skills of maintenance personnel to provide maintenance services for new energy vehicles, while improving the professional skills of maintenance personnel, so that maintenance personnel can operate maintenance equipment more proficiently, so that traditional maintenance skills can meet new energy vehicle maintenance standards.

Warranty, after all, the oil car is guaranteed, and the tram must be guaranteed. Maintenance, new energy vehicles are more worry-free than oil vehicles, so they will also be provided.

The maintenance industry should also broaden its business scope, introduce new energy vehicle maintenance tools, and cooperate with the professional skills of maintenance personnel to provide maintenance services for new energy vehicles while improving the professional skills of maintenance personnel.

Traditional enterprises and the maintenance industry, in response to this form, should come up with a new strategy, change the traditional marketing model, and adopt online and offline joint marketing, so as to increase turnover.

Change maintenance technology, learn new maintenance skills, improve maintenance personnel technology, increase corresponding maintenance equipment, and strengthen the technical literacy of maintenance personnel.

These strategies are to conduct research and analysis on new energy vehicles, understand the work and development of new energy vehicles, study the structure of new energy vehicles, and understand the accessories of new energy vehicles.

Choose different maintenance methods for different situations, and the maintenance technology should be improved in the maintenance process, and the technical level must be improved, and the maintenance ability of maintenance workers should be improved.

New energy vehicle maintenance, first of all, should do a good job of troubleshooting, clear faults, in order to find targeted solutions, some faults also need in-depth judgment and analysis, in order to clarify the nature of the fault. Through the above analysis, it can be seen that the power system of new energy vehicles is the energy system of new energy vehicles, which plays an important role in ensuring the normal operation of new energy vehicles, but it is precisely because of frequent use that there are many failures in the power supply system.

The use of this technology should follow the following principles: first, ensure that the power supply is turned off and ensure that the maintenance work is carried out without power supply; secondly, the interface is sealed, and the insulating discharge technology is adopted; Third, do a good job of testing, under normal circumstances, even after cutting off the power supply of the new energy vehicle battery, there will still be residual electricity, which should be done actively to ensure that there is no residual power storage, if there is still power, professional discharge technology should be used for discharge, so as to ensure that the maintenance of new energy vehicles is completed under the condition of no electricity.

In order to reduce the troubleshooting time, electronic diagnosis technology can be used to troubleshoot the fault of the new energy vehicle, so as to improve the maintenance efficiency.

Secondly, the current new energy vehicles are facing more maintenance problems, these problems are intricate, some are related problems, these problems need to be summarized and classified, to find reasonable solutions, such as the new energy vehicle air conditioning problems on the one hand is the internal problems of the air conditioner, on the other hand, the power problem, the first problem should be solved first, and then the air conditioning internal maintenance, in order to ensure the efficiency of maintenance.

In addition, in the structural system of new energy vehicles, many parts are interdependent and exist, if there is a problem with several of the parts, it is necessary to repair according to the internal structural principles of new energy vehicles when maintaining, so as to prevent repeated maintenance and repeated disassembly.

From the current new energy electronic diagnosis technology, the main diagnostic technology is decoder electronic diagnosis technology, code reading card electronic diagnosis technology, etc., through the application of these technologies, not only can effectively summarize the problems of new energy vehicles, but also optimize the internal structure of new energy vehicles, to achieve the purpose of improving the maintenance effect.