China, Shenzhen, December 23, 2021, the new high-end smart car brand AITO was officially released. It is worth noting that AITO’s first model, the Wenjie M5, is equipped with Huawei’s DriveONE power domain solution, which can achieve the two characteristics of strong power and ultra-comfort under the premise of high efficiency. The front asynchronous and rear synchronous dual motor drive enables acceleration from 100 kilometers to 4 seconds. In actual tests, it can achieve 0-100km/h continuous acceleration 20 times. It supports 180km/h high-speed cruise and the motor does not overheat, creating the ultimate driving experience for users. . ?
Under the guidance of the "double carbon" goal, the automobile industry is transforming towards new energy and intelligence. Huawei uses "digital technology and digital platform" as its starting point to deeply integrate with the automotive industry and accelerate the electrification process of the automotive industry. Huawei's DriveONE full-stack power domain solution includes electric drive systems, vehicle-mounted integrated power supplies, and battery management systems. This system includes core components such as motors, MCUs, PDUs, OBCs, DC/DCs, reducers, and AI BMS. Huawei has been deeply involved in the underlying basic technologies of power electronics for more than 30 years, and has strong R&D capabilities and technical background in related product fields, helping DriveONE become an industry-leading solution.
AITO Wenjie M5 is equipped with Huawei’s DriveONE power domain solution to achieve a luxury-level driving experience with strong power, ultra-comfortable, high safety, flexibility and convenience.
·?The high-speed motor is equipped with intelligent oil cooling, releasing more driving space and creating a stronger power experience
During the driving process, due to mechanical energy loss and the thermal effect of current, the coils of the motor The windings, rotors, and the joint between the motor rotor and the gear are all prone to generating heat. If the heat is not taken away in time, the motor temperature will be too high. High temperature will burn out the winding insulation layer, causing a short circuit and destroying the motor. It will also cause the magnetism of the rotor to disappear, causing it to stop rotating and cause an accident. Therefore, the thermal management technology of the powertrain is very critical.
There are currently two motor cooling methods: water cooling and oil cooling. Water-cooling technology is used. For insulation reasons, a water jacket is separated between the windings and the coolant. The heat transfer efficiency is low and it is difficult to meet the heat dissipation requirements of the motor under high-speed rotation. Huawei's DriveONE three-in-one electric drive adopts more effective intelligent oil cooling technology to achieve ultra-small size, ultra-light weight, ultra-long life, and ultra-excellent performance.
Compared with water-cooled motors in the industry, Huawei uses high-speed oil-cooled motors. With the same power and torque, the volume and weight of the three-in-one electric drive can be reduced by 10%; the motor rotor and stator are immersed in cooling to achieve average winding The peak temperature is reduced by 30°C, the peak temperature of the magnet is reduced by 15°C, and the service life can be doubled; based on the thermal simulation results, for components prone to high temperatures, a unique oil channel design with active spraying is used to actively lubricate the bearings & gears, and the bearing life Improved by 10, the cooling effect in the high speed zone is better, it can support higher speeds, and it can accelerate 0-100km/h for 20 consecutive times and other excellent experiences.
· NVH performance: AI optimization algorithm, high-precision simulation, creating a luxury car-level concert hall-like immersive experience
NVH (Noise, Vibration and Harshness) ) is an important indicator to evaluate the driving comfort of a car. The lower the NVH, the smaller the noise and vibration interference, and the higher the driving comfort.
Huawei has established a first-class expert team in the NVH field. Through its self-developed multi-objective optimization software platform, it applies parametric modeling and AI algorithms to find the optimal solution for NVH design, helping to achieve simulation results with an error of less than 5. Based on the simulation optimization results, the noise generation source and transmission path were optimized and designed in the directions of gear modification, housing optimization, and electromagnetic force optimization to guide product development and achieve the NVH of Huawei DriveONE electric drive system to reach 78 dB, leading the industry level ( 83dB), creating a quiet and comfortable experience for customers.
·Thermal runaway warning: Introducing artificial intelligence technology to achieve 24-hour advance warning of thermal runaway to ensure driving safety
The evolution of battery thermal runaway involves the comprehensive effects of electrochemistry, thermodynamics and mechanical mechanics , is a dynamic and gradual complex process. Current vehicle-side BMS and big data algorithms cannot effectively predict it in low-dimensional data space, and thermal runaway warning has become a difficult problem in the industry.
Huawei DriveONE AI BMS integrates battery mechanism and AI expert experience. From the perspective of AI dimensionality enhancement, it intelligently identifies the relationship between highly sensitive features of thermal runaway and the battery mechanism layer, and extracts key features through dimensionality reduction and denoising. , to achieve algorithm acceleration and algorithm convergence.
At the same time, AI’s self-learning ability can realize automatic model optimization in massive data training, improve model accuracy and prediction effects, and can achieve 24-hour advance warning of thermal runaway, detect and suppress False alarm lt; 0.1/month to ensure users’ driving safety.
·?V2L V2V: 3.5kVA reverse power supply function, safe electricity use in all scenarios
V2L (Vehicle to Load), which is the reverse power supply function, V2L can realize electric vehicles The external output is 220V 50Hz household AC power, which can support scenarios such as camp mode and emergency rescue power replenishment.
V2V (Vehicle to Vehicle) enables electric vehicles to charge other electric vehicles, and can solve the problem of recharging electric vehicles in scenarios where charging facilities are inconvenient.
Huawei’s DriveONE vehicle charging system supports 3.5kVA external discharge function and has a high-precision insulation inverter detection function. It can accurately identify leakage current and alarm for interruption, effectively ensuring V2L/V2V power safety.
Huawei DriveONE is currently installed on mid-to-high-end models of more than a dozen mainstream car companies, continuing to lead the development of the electric vehicle power industry. Huawei Smart Electric will adhere to its original intention of being "customer-centric" and continue to forge ahead to help car companies build good cars and provide better-quality electric travel products to users around the world.