Five core technologies of Xiaomi Auto's "Modena" architecture

The "Modena" architecture is one of the underlying architectures of Xiaomi's "Full Ecosystem for People, Cars and Home". The five core technologies of the "Modena" architecture include: 1. Xiaomi HyperEngine, Xiaomi's super motor; 2. Xiaomi's self-developed CTB integrated battery technology; 3. Xiaomi HyperCasting, Xiaomi's super large die-casting; 4. Xiaomi's full-stack self-developed intelligent driving technology Xiaomi Pilot ; 5. Xiaomi Smart Cabin.

1. Xiaomi HyperEngine

Xiaomi's self-developed HyperEngine V8s, HyperEngine V6/V6s three super motors use a number of innovative technologies such as two-way full oil cooling, S-shaped three-dimensional oil circuit design, and stepped dislocation design. The Xiaomi HyperEngine V8s super motor has a maximum speed of 27,200 rpm, a maximum power output of 425 kilowatts, a peak torque of 635 Nm, and a power density of 10.14 kW/kg. Xiaomi has applied for 155 patents for this motor, of which 60 have been authorized. In terms of heat dissipation design, HyperEngine V8s uses two-way full oil cooling and S-shaped three-dimensional oil circuit design. The stator part uses a double-circulation three-dimensional oil circuit, and the heat dissipation area is increased by 100%, achieving a maximum cooling of 20 degrees; the rotor part uses a patented S-shaped oil circuit, and the heat dissipation area is increased by 50%, achieving a maximum cooling effect of 30 degrees. In addition, the stator silicon steel laminations also use a "stepped" dislocation design, which increases the effective heat dissipation area by another 7%. The maximum power of the HyperEngine V6 super motor is 299 horsepower and the peak torque is 400 Nm, while the maximum power of the HyperEngine V6s super motor is 374 horsepower and the peak torque is 500 Nm. To achieve this high speed target, Xiaomi creatively used AI simulation technology to optimize rotor stress. It took 8 months, 200,000 electromagnetic and structural coupled AI simulation iterations, and multiple rounds of sample trials to finally obtain the optimal solution. At the same time, Xiaomi has also achieved remarkable results in the pursuit of extreme efficiency, reducing the stator-rotor air gap limit to 1.3mm, further improving the performance of the motor.

2. Self-developed CTB integrated battery technology:

Xiaomi's self-developed world's first inverted cell CTB integrated battery not only focuses on pure driving range, with a battery capacity of up to 150 degrees and a theoretical CLTC driving range of up to 1,200km+, but also comprehensively improves the battery's integrated efficiency, safety and heat dissipation performance through a series of innovative designs and 128 battery field patents (65 of which have been authorized), creating a world-class battery system for users. Xiaomi's automotive CTB integrated battery adopts a two-in-one floor and upper cover design, inverted cells, multi-functional elastic interlayers, and minimalist wiring harnesses, which makes the integrated efficiency reach 77.8%, an overall increase of 24.4%, and releases 17mm of height. Among them, the body floor and the battery pack upper cover are combined into one, which not only releases 10mm of height, but also increases the integrated efficiency by 9.1%. The first inverted cell technology enables multiple modules to share the bottom space, further releasing 7mm of height and increasing the integrated efficiency by 5.8%. At the same time, Xiaomi also introduced a multifunctional elastic interlayer, which is both a liquid cooling plate and a structural component, combining the heat insulation plate, water cooling plate and horizontal and vertical beams into one, thereby improving the integration efficiency by 6.5%. In addition, by reducing the wiring harness by 91%, the integration efficiency was increased by another 3%.

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, which has three independent thermal runaway redundant monitoring and alarm strategies, as well as "all-weather" accurate early warning functions. The application of battery cloud safety technology can collect data in real time and analyze and warn through a dedicated network encrypted cloud, and actively cut off power within 4ms when necessary. After the world's most stringent battery safety testing , including 1050+ safety test verifications and 96 times the international endurance test duration, each Xiaomi battery has industry-leading reliability.

3. Xiaomi HyperCasting

Xiaomi has become the only domestic automaker that independently develops both "large die-casting equipment cluster" and "die-casting materials" with its self-developed 9100t super large die-casting technology - Xiaomi HyperCasting . Xiaomi HyperCasting not only reflects Xiaomi Auto's leading position in technology and material research and development, but also demonstrates its unremitting pursuit of environmental protection, efficiency and safety in automobile manufacturing.

In terms of equipment innovation, the cluster equipment covers an area of ​​840m² and has a total weight of 1050t, which is equivalent to the size of two basketball courts. The clamping force reaches 9100t, the top in the industry. Xiaomi's self-developed visual large model quality judgment system can complete the inspection within 2 seconds, with 10 times the efficiency of manual labor and 5 times the precision of elites . The application of this technology has enabled the rear floor of Xiaomi Automobile to achieve the feat of 72 parts in one, reducing 840 welding points, reducing the overall weight by 17%, and significantly reducing production hours by 45%.

In terms of material research and development, Xiaomi has developed its own high-strength, high-toughness, heat-treatment-free, environmentally friendly die-casting material "Titan Alloy", which ranks first in China. Through the self-developed "Multi-material Performance AI Simulation System", Xiaomi has selected 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 Alloy" contains 30% recycled aluminum, which reduces carbon emissions by 352.53Kg for each part, and the peak production capacity is equivalent to planting 4.88 million more trees each year.

With the innovation of technology and materials, Xiaomi Motors overcomes the drawbacks of traditional large die-casting and adopts a three-stage repairable design: "one-piece die-cast rear floor + medium- and high-speed crumple zone + low-speed crumple zone". In medium- and low-speed collisions, there is no need to replace large die-casting parts; in high-speed collisions, this design can meet the 90km/h rear collision standard, exceeding the highest global standard.

4. Xiaomi Pilot, Xiaomi’s full-stack self-developed intelligent driving technology

Xiaomi's key technologies for smart driving include adaptive zoom BEV technology, which is the first of its kind in the industry. It can zoom like the human eye and can adaptively call different perception algorithms according to different scenarios . Its perception grid can be as small as 0.05m and as large as 0.2m, and its recognition range extends from 5cm to 250m. It can be more accurate in parking scenarios, see wider in urban scenarios, and see farther in high-speed scenarios. The road model released by Xiaomi is subverting the traditional smart driving's perception of road condition recognition. The model can not only recognize real-time road conditions and intelligently adjust driving trajectories, but also navigate smoothly under complex intersection conditions without relying on high-definition maps. By learning complex intersection conditions and the driving habits of experienced drivers, it can formulate a more reasonable driving trajectory and dynamically detour for emergencies.

In some scenarios, the underlying algorithm capabilities of the system are even two generations ahead of the industry. Among them, the world's first mass-produced end-to-end "Perception Decision Big Model" developed by Xiaomi has demonstrated amazing strength in application scenarios such as machinery and warehouses. The error of traditional perception is greater 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 on the left and right. Xiaomi's "Perception Decision Big Model" can observe and dynamically adjust to park in super-difficult parking spaces in real time through the two-in-one design of perception and decision algorithms. "People-centered " smart cockpit: Creating an advanced mobile smart space The smart cockpit, as the last link of the "full ecosystem of people, cars and homes", officially transforms the car into a key carrier of an advanced mobile smart space. Based on Xiaomi Pengpai OS, Xiaomi has built a unified visual interaction system, realizing a comprehensive shared ecosystem from software to hardware . Through a series of underlying reconstructions such as the smart cockpit, Xiaomi has laid a solid foundation for the evolution of automobiles.

This smart cockpit adopts a "people-centric" interactive architecture and is equipped with a 16.1-inch 3K ultra-clear central control screen, a 56-inch ultra-large HUD head-up display, and a 7.1-inch flip instrument screen. Following the visual unified design language of Xiaomi Pengpai OS, Xiaomi has carefully designed the fonts, icons, and animations. The multi-task flexible framework allows desktop applications to be dragged and resized at will, and automatically adapt to various devices. The industry's first five-seat five-tone zone interactive function supports stable collaborative wake-up of multiple devices. Almost all operations can be completed through "Xiao Ai" voice control, and core functions support offline use.