On December 28th, Xiaomi's automotive technology conference was held in the National Convention Center, officially disclosing the progress and breakthroughs of Xiaomi's five core technologies, and ushering in the debut of the platform's first product, Xiaomi SU7. As one of the underlying architectures of Xiaomi's "people, car and home ecology", the five core technologies of the "Modena" architecture include Xiaomi super motor Xiaomi Hyperengine, Xiaomi self-developed CTB integrated battery technology, Xiaomi Super Die Casting Xiaomi Hypercasting, Xiaomi full-stack self-developed intelligent driving technology Xiaomi Pilot and Xiaomi Smart Cabin Smart Cabin. Key areas such as the intelligent cockpit have achieved many global firsts.
1. No. 1 in China, bringing users an ubiquitous advanced intelligent ecology.
Xiaomi SU7 Gulf Blue.
Xiaomi Super Motor: Refresh the performance ceiling of the industry.
Xiaomi's self-developed HyperEngine V8S and HyperEngine V6 V6S three super motors adopt a number of innovative technologies such as two-way full oil cooling and heat dissipation, S-shaped three-dimensional oil circuit design, and stepped dislocation design, which refresh the industry ceiling with performance comparable to that of large V8 and large V6 powertrains in the fuel era.
xiaomi hyperengine v6/v6s
Among them, the HyperEngine V8S super motor with a speed of up to 27,200 rpm has a power density of 1014kW kg, more than 60% more than Tesla's current state-of-the-art level. Xiaomi has applied for 155 patents for this motor, of which 60 have been authorized. With the underlying technological innovation, the HyperEngine V8S super motor not only has an impressive high power output of 425kW and a peak torque of 635N·m, but also has reached the "international leading level" certified by the China Electrotechnical Society and the Guochuang Center in terms of strength, heat dissipation and work efficiency.
In order to match the 27200rpm speed that far exceeds the industry standard, the HyperEngine V8S super motor uses the industry's first 960MPa highest-strength special silicon steel sheet, which is more than twice the strength of the industry's mainstream products. In order to achieve this breakthrough, Xiaomi and Shougang established a joint technical laboratory, and conducted 108 batches of tests in a year and a half, jointly solving the problems of silicon steel's strength, magnetic properties and production.
In terms of heat dissipation design, HyperEngine V8S adopts two-way full oil cooling and S-shaped three-dimensional oil circuit design. The stator part is increased by 100% through the double-cycle three-dimensional oil circuit, and the maximum cooling of 20 degrees Celsius is realizedThe rotor uses a patented S-shaped oil circuit, which increases the heat dissipation area by 50% and achieves a maximum cooling effect of 30 degrees. In addition, the stator silicon steel lamination also adopts a "stepped" dislocation design, which increases the effective heat dissipation area by another 7%.
HyperEngine V8S super motor with up to 27,200 rpm.
At the same time, HyperEngine V8S has achieved 9811% motor efficiency. The differentiated thickness design of the stator and rotor silicon steel sheet will be 02mm stator ultra-thin silicon steel sheet with 0The combination of 35mm rotor ultra-high-strength silicon steel sheet makes strength and efficiency go hand in hand. The application of high-performance NdFeB permanent magnets has broken through the traditional 54-slot 6-pole design patent blockade, and uses 8-layer hairpin flat wire winding, with a slot filling rate of up to 77%.
Xiaomi's self-developed HyperEngine V6 V6S super motor ranks first in the industry with a speed of 21,000 rpm, surpassing the world's strongest mass-produced motor (Tesla Model S Plaid 20,000rpm). Among them, the HyperEngine V6 super motor has a maximum power of 299 PS and a maximum torque of 400 Nm, while the HyperEngine V6S super motor has a maximum power of 374 PS and a maximum torque of 500 Nm.
To achieve this high speed target, Xiaomi has creatively adopted AI** technology to optimize rotor stress. After 8 months, 200,000 iterations of electromagnetic and structural coupling AI** and multiple rounds of sample trial production, the optimal solution was finally obtained. At the same time, Xiaomi has also achieved remarkable results in the pursuit of the ultimate in efficiency, reducing the stator and rotor air gap limit to 13mm, which further improves the performance of the motor.
Motor rotor laser curing winding process.
It is worth mentioning that Xiaomi also has a patent for the spaced broken magnetic bridge + sleeve scheme. At the same time, Xiaomi announced that it has successfully pre-researched the next generation of super motors, and through the carbon fiber laser curing winding process, the rotor has successfully achieved a maximum speed of 35,000 rpm in the laboratory. The sufficient patent technology reserve demonstrates Xiaomi's innovative strength and profound accumulation in the field of motor technology, and also provides more possibilities for the diversity and innovation of its future products.
Self-developed CTB integrated battery technology: to create the world's best battery system.
Xiaomi's self-developed CTB integrated battery, the world's first inverted battery cell, not only focuses on pure mileage, with a battery capacity of up to 150 degrees and a theoretical CLTC range of up to 1200km+, but also comprehensively improves the integrated efficiency, safety and heat dissipation performance of the battery through a series of innovative designs and 128 patents in the battery field (65 of which have been authorized), creating a world-class battery system for users.
Create a world-class battery system for users.
The Xiaomi car CTB integrated battery uses a floor cover with two combinations.
1. The design of inverted cells, multi-functional elastic interlayer and minimalist wiring harness makes the integration efficiency reach 778%, an overall increase of 244% and released a height of 17mm. Among them, the body floor and the upper cover of the battery pack are combined into one, which not only releases a height of 10mm, but also improves the integration efficiency by 91%。The inverted core technology of the first power cell realizes the sharing of bottom space by multiple modules, further releasing the height of 7mm, and improving the integration efficiency by 58%。At the same time, Xiaomi has also introduced a multi-functional elastic interlayer, a design that is both a liquid cold plate and a structural part, combining a heat insulation plate, a water cooling plate and a horizontal longitudinal beam in one, thus improving the 65% integration efficiency. In addition, by reducing the number of wiring harnesses by 91 percent, the integration efficiency has been improved by another 3 percent.
To ensure the stability of the range, Xiaomi adopts the industry's first-class standard safety design. The downward-facing design of the pressure relief valve allows for a quick downward release of energy in extreme situations, maximizing the safety of the passenger compartment. The 14 layers of hard-core physical protection, including 3 layers of top support, 3 layers of side protection and 8 layers of bottom protection, make security follow.
The industry's top heat dissipation and thermal insulation design is also a highlight of Xiaomi's battery technology. The double-large surface strong cooling scheme ensures that there are heat dissipation plates on both sides of the cell, and the cooling area reaches 78m is the largest in its class, achieving a cooling effect that is 4 times the average level of the industry. A total of 165 pieces of aerogel insulation material are used on the side of the cell, which can resist high temperatures of 1000°C, making the thermal insulation performance of the battery to a new level.
Xiaomi's battery management software is fully stacked and self-developed.
In terms of battery management, Xiaomi cars are equipped with a full-stack self-developed battery management system with the highest functional safety level of ASIL-D, with 3 independent redundant monitoring and alarm strategies for thermal runaway, as well as an "all-weather" accurate early warning function. The application of battery cloud security technology can collect data in real time and analyze and warn through the encrypted cloud of the private network, and realize active power failure within 4ms when necessary. After the world's most stringent battery safety testing, including 1050+ safety test verifications and 96 times the international durability test time, every Xiaomi battery has industry-leading reliability.
Self-developed 9100T super large die-casting technology: a reliable reliance for shaping mobile intelligent spaces.
With its self-developed 9100T super large die-casting technology, Xiaomi Hypercasting, has become the only domestic automobile manufacturer that independently develops both a large die-casting equipment cluster and die-casting materials. Xiaomi HyperCasting not only demonstrates Xiaomi's leading position in technology and materials research and development, but also demonstrates its unremitting pursuit of environmental protection, efficiency and safety in automobile manufacturing.
9100t large die-casting equipment cluster.
In terms of equipment innovation, the cluster equipment covers an area of 840m, with a total weight of 1,050t, which is equivalent to the size of two basketball courts, and the clamping force reaches the top of the industry at 9,100t. Xiaomi's self-developed visual large model quality judgment system can complete the inspection within 2 seconds, with 10 times the high efficiency of manual labor and 5 times the high accuracy of the elite. The application of this technology has enabled the rear floor of Xiaomi cars to achieve the feat of integrating 72 parts, reducing the number of solder joints by 840, reducing the overall weight by 17%, and reducing production man-hours by 45%.
In terms of material research and development, Xiaomi's self-developed high-strength, high-toughness, heat-free and heat-free environmentally friendly die-casting material Titan Alloy is the first in China. Through the self-developed multi-material performance AI** system, Xiaomi selects the best alloy formula from 10.16 million formulas to ensure the perfect combination of strength, toughness and stability. It is worth mentioning that Titan contains 30% recycled aluminum, which reduces carbon emissions by 352 per part53kg, the peak capacity is equivalent to planting an additional 4.88 million trees per year.
Three-section rear floor design.
In addition to the innovation of technology and materials, Xiaomi Auto overcomes the disadvantages of traditional large die-casting and adopts a three-stage repairable design: integrated die-casting rear floor + medium and high speed collapse area + low speed collapse area. In low- and medium-speed collisions, there is no need to replace large die castings;In high-speed collisions, this design can meet the 90km h rear collision standard, which exceeds the highest global standard.
Full-stack self-developed intelligent driving technology: Ranked among the first echelon of the industry in 2024.
Autonomous driving technology has become the focus of breakthroughs in the field of intelligent mobility. In this technological battle, adaptive zoom BEV technology, road large model and super-resolution occupancy network technology constitute the three key technologies of Xiaomi's intelligent driving. Among them, the adaptive zoom BEV technology is the first in the industry, which can zoom like the human eye and can adaptively call different perception algorithms according to different scenes. The perception grid can be as small as 005m, up to 02m, the recognition range extends from 5cm to 250m, the parking scene is more accurate, the urban scene is wider, and the high-speed scene is farther.
Three key technologies of Xiaomi's intelligent driving.
At the same time, Xiaomi's industry-first road model is subverting the perception of traditional intelligent driving on road condition recognition. The model can not only recognize real-time road conditions and intelligently adjust the driving trajectory, but also navigate smoothly without relying on high-definition maps in complex intersection conditions. By learning the working conditions of complex intersections and the driving habits of old drivers, it can formulate a more reasonable driving trajectory and carry out dynamic detours for emergencies.
In terms of obstacle recognition, Xiaomi's super-resolution occupancy network technology realizes unlimited types of special-shaped obstacle recognition. Compared with the traditional occupancy network, which relies on natural language models to describe obstacles into squares, Xiaomi's innovative super-resolution vector algorithm can simulate all visible objects into three-dimensional objects with continuous surfaces, thereby improving the recognition accuracy to 01m, 2 times the industry level, 3 times that of Tesla. In addition, Xiaomi's self-developed one-click noise reduction function completely eliminates the impact of rain and snow on recognition, greatly reducing the probability of misidentification.
In terms of hardware, the system is equipped with top-of-the-line configurations, including two NVIDIA Orin high-computing power chips, with a comprehensive computing power of up to 508TOPS. The perception hardware includes 1 lidar, 11 high-definition cameras, 3 millimeter-wave radars and 12 ultrasonic radars (MAX version of the model).
Aware of the hardware. In some scenarios, the underlying algorithm capability of the system is even two generations ahead of the industry. Among them, the self-developed world's first mass-produced end-to-end perception decision-making model has shown amazing strength in application scenarios such as mechanical storage locations. Traditional perception has an error of more than 10cm when parking, and it is impossible to park in a parking space that is the same width as the car and only 5cm left and right, while Xiaomi's perception decision-making model can observe and dynamically adjust parking spaces in real time through the two-in-one design of perception and decision-making algorithms.
Xiaomi's full-stack self-developed intelligent driving technology will not only help Xiaomi enter the first echelon of the industry in 2024, but also show smarter and safer assisted driving capabilities in all scenarios. From the innovation of key technologies to the upgrading of hardware systems, to the leading applications in some scenarios, all this indicates that a bright future of intelligent driving is within reach.
"People-centric" intelligent cockpit: create an advanced mobile intelligent space.
The intelligent cockpit, as the last link of the whole ecology of people, cars and homes, officially transforms the car into a key carrier of an advanced mobile intelligent space. Based on Xiaomi's surging OS, Xiaomi has built a unified visual interaction system and realized a comprehensive sharing ecosystem from software to hardware. Through a series of underlying reconstructions such as the intelligent cockpit, Xiaomi has laid a solid foundation for the evolution of automobiles.
"Human-centered" intelligent cockpit interaction architecture.
This intelligent cockpit adopts a "human-centric" interactive architecture and is equipped with 161-inch 3K ultra-clear central control screen, 56-inch large HUD head-up display and 71-inch flip instrument screen. Following the visual unified design language of Xiaomi Surging OS, Xiaomi has carefully designed fonts, icons, and animations. The multitasking flexible frame allows desktop apps to be dragged and dropped, resized, and automatically adapted to a variety of devices. The industry's first five-seat five-tone interactive function supports stable and collaborative wake-up of multiple devices, almost all operations can be completed through Xiao Ai's voice control, and the core functions support offline use.
At the same time, the starting speed of the car machine reached an astonishing 1In 49 seconds, Xiaomi is the industry's first cockpit system streaming OTA upgrade technology, which realizes the upgrade while being the best. In addition, the intelligent cockpit also has super powerful ecological application expansion capabilities, including Pad APP sharing, mobile APP sharing, and ecological hardware sharing. For example, the mobile phone application can be directly projected to the car desktop for use, the mobile phone ** meeting can share the outside camera, and the in-car reading light can call the light sensor of the mobile phone.
Control the car as you would in a smart home.
In the ecological screen of "People's Car Home", the car is like a mobile home. You can control the car just like you would in a smart home. In the Mi Home app, the car is presented in the form of a room, and through the quick control card in the Fusion Control Center, you can control the car with one click. At the same time, Xiaomi pad can also be hooked up to the car, becoming the second and third ecological expansion screens, realizing the linkage interaction of five screens.
Based on the underlying logic of this Internet of Everything, Mijia devices can also get on the car without feeling. At present, the Xiaomi smart cockpit has supported 1000+ Mi home devices, automatic discovery, password-free access, and can set up automation scenarios. Xiaomi has also opened up unified standardized interfaces and rich standard protocols to create the strongest exclusive cariot ecosystem. The built-in Cariot docking station supports a wide range of devices, including smart fragrances. Four sets of pins are designed to provide power supply and expand the physical buttons. In order to meet the needs of Apple users, Xiaomi fully supports wireless CarPlay and provides exclusive accessories and exclusive apps for iPad on the rear expansion screen.
With a comprehensive shared ecology from software to hardware, human-centered interaction design, and strong ecological application expansion capabilities, the intelligent cockpit will bring users an unprecedented ecological experience of people, vehicles and homes.
Throughout the history of the world's automobile development, every leapfrog breakthrough in the field of technology is not accidental, but stems from its firm concept of technological long-termism. In Xiaomi's view, although it is very complex, as long as it is really dry, really strong, and really advanced, and starts to invest in the underlying core technology, it can open up the infinite possibilities of mobile intelligent space.
It is based on this long-term thinking that Xiaomi resolutely summoned 3,400 engineers, worked hard for more than 1,000 days, and invested tens of billions of funds, finally bringing a solid technical foundation for the vision of "people, cars, and homes". Because of this, from Xiaomi's super motor Xiaomi HyperEngine to Xiaomi's smart cabin, each core technology continues to break through the industry ceiling of traditional intelligent pure electric vehicles, making seamless connections to more than 600 million devices around the world, including more than 200 categories including Xiaomi cars, helping the "people-centric, active service to people" super intelligent ecology become a reality. In the future, the vision of advanced "mobile smart space" represented by the first model of Xiaomi Su7 is bound to present more possibilities, covering more than 95% of users' life scenarios, so that intelligence can serve everyone in detail.