Xiaomi Car answers the 100 most burning questions (Part 1)

Many questions have been raised about the Xiaomi car presentation Since then, followers, fans and everyone else have been very unhappy with the current info. Not only the common man, but also the trade press is watching the official Xiaomi SU7 announcements with interest. And the rumours are just pouring in about the release, prices and of course the smears of the doubters.

1. Many fans have reported that there have been a lot of rumours about Xiaomi cars recently. Is Xiaomi's legal department really doing its job? When will the relevant answers be announced?
   This time we were hosting an automotive technology conference and the popularity was so great that it exceeded our expectations. On the one hand, the huge popularity reflects users' expectations of Xiaomi cars, and we are very happy. On the one hand, there are also a lot of false information, rumours and malicious slander, which we will clarify in time, and we also take firm responsibility for the legal liability of those who spread rumours and slander.
2. What is the Xiaomi SU7 approximate price? When will it be announced?
   In fact, we do not yet have a final price. Mr Lei also said at the Xiaomi Auto Technology Conference that it is indeed a bit expensive, but it will be "reasonably expensive". It will not be 99,000, it will not be 149,000, it will not be 199,000 yuan. The final price will be announced at the official launch of the Xiaomi SU7.
3. There is a lot of news about the price of Xiaomi cars on the internet. Right?
   The rumours on the internet about the price of Xiaomi cars are all fake news, and the final price has not yet been determined. The final price will be announced when the Xiaomi Car is officially released.
4. Are the main features of the Xiaomi SU7 basically released?
   The Xiaomi Car Technology Conference was held on 28 December 2023. This time, we only presented the five core technologies of smart electric vehicles and gave a brief overview of the products. We still have many technologies and product content that we have not yet developed. I will give you more details when Xiaomi SU7 is officially launched.
5. The higher the pressure, the better for large die castings? Why is the Xiaomi large die casting size 9100 tonnes?
   What we often talk about here is the clamping force of a large die-cast. The clamping force is determined by the die design. Xiaomi's integrated large die casting backfloor is larger and more complex than the Tesla Model Y, so they ended up with a clamping force of 9100t. In actual use, the maximum value of Xiaomi's super large press clamping force is 9500t, and the stable value can reach 9300t.

   Clamping force is not the only indicator of high press technology. The performance of heat treatable alloy materials, the design of the die set, defect detection, etc. are all essential indicators for measuring large-scale die-casting technology. Xiaomi is currently the only automotive company in the world and the only one in China with proprietary heat-treatable alloy materials and proprietary large die-casting island groups.





6. Someone on the Internet said that the Xiaomi's big injection moulding machine directly renamed from Haiti's current 8800t injection moulding machine. Is this true?
   Of course not. Xiaomi's super high press capacity is 9100 t (tonnes), not the model, but the actual nominal clamping force. In fact, the Xiaomi super large press cluster's normal operating clamping force is up to 9500 tons. It is worth mentioning that Xiaomi's super large 9100t press machine is jointly developed by Xiaomi and Haitian. Based on the existing die-casting machine technology in the industry, Xiaomi's R&D team has implemented 11 patented design innovations and improvements, most of which are invention patents, such as AI active optimization injection parameter adjustment system, etc. But the die-casting machine is only one link in the chain. Xiaomi has developed the entire die-casting cluster system in-house, including 60 devices and 433 process parameters.
7. If something hits a large die-cast part, how much will Xiaomi's maintenance cost be?
   The rear of the Xiaomi SU7 has a three-stage design, and the buffer zone is based on the integrated large die-cast rear floor. For conventional crashes, only the crumple zone needs to be replaced, and repair costs are the same as for conventional designs. For very high speed collisions, the integrated large die-cast rear floor can provide better safety.

   In general, the Xiaomi SU7's integrated large injection-moulded rear floor is designed to make small impacts easy and painless to repair, and large impacts stronger for your safety. It's the best solution for now.

8. High returns on Xiaomi's large die-cast products? Is the use of large die casting from the start causing quality problems?
   Large-scale injection moulding technology is a typical long-term technology and a ticket for the leading car manufacturers of the future. Xiaomi Motors decided from the start to develop the entire stack in-house and invested in two sets of injection moulded islands at the same time. To make sure nothing went wrong, a traditional stamping design set was added at the time and we worked on three design sets at a time. Finally, Xiaomi's super large stamping project was successfully launched.

   At the same time, our proprietary large die casting island technologies include temperature control systems, aluminium fluid transfer systems, injection systems, casting systems, etc., and we ensure yield through proprietary artificial intelligence fault detection systems.

9. What is the actual performance of the Xiaomi Titan Alloy? Is it a proprietary alloy just to save costs?
   Xiaomi Titanium Alloy is superior in terms of injection molding performance, mechanical properties, durability, recyclability and economy. Xiaomi Titanium Alloy 40% also contains recycled aluminum, which is very environmentally friendly. Xiaomi is the only one in China and the only one in the world that can be mass produced. An automotive manufacturer that develops in-house large size die casting materials. As for why it was necessary to research alloy materials at the time, I also explained at the press conference that large-scale injection moulding had extremely strict requirements for alloy materials. The supplier's formula at the time could not meet our requirements, so we could only research the materials ourselves. In any case, the cost of researching materials in-house is much higher than using a mature solution directly.
10. Is the Xiaomi Titan Alloy really proprietary?
    Yes. Some netizens have previously been misled by misinformation. What they saw were the chat notes of a Professor Yang from a certain university. In fact, Professor Yang was quick to clarify. I salute the spirit of Professor Yang who seeks the truth from the facts and I am sorry for the misunderstanding he caused. I hope everyone can help clarify.





11. What is the difference in the special formula of the Xiaomi Titan Alloy?
    The relevant patents have been published and are available for inspection, and the proportions of the eleven elements used in the alloy have been published (Patent number: ZL 2023 1 0604165.9)
12. The Xiaomi's supermotors how many of them are home-grown?
    In total, three engines were officially released and we also presented a pre-research engine that was implemented experimentally. Among them, the Xiaomi Super Motor V6 and V6S were developed jointly with UMC and Innovance, respectively, with a speed of 21,000 rpm. At the same time, Xiaomi also has in-house developed Xiaomi Super Motors V8s with a rpm of 27,200 rpm. This information was also disclosed by Inovance on its A-share investor interactive platform.
13. Is the Xiaomi Motor V6 an old UMC product? Why are the model names the same?
    The Xiaomi Motor V6 is a new motor developed jointly by Xiaomi and UMC. Through the joint efforts of the two parties, the voltage topology of the motor rotor has been improved, the speed and power density of the motor have been significantly increased, and the relevant patents have been obtained.

    The so-called "Xiaomi Engine V6 is the old model 2020 UMC TZ220XS000 engine" is rumoured on the internet, which is purely a rumour. The naming of TZ220XS000 is only according to national standards: TZ is permanent magnet synchronous motor; 220 is the outer diameter of the motor; X is the resolver position sensor; S is the water cooling; 000 is the brand code of UMC. The same internal name does not mean that it is the same motor, this is known from publicly available information in the industry.

14. Have you confirmed the mass production of V8 engines?
    V8s have reached mass production and will be on the market in 2025. Currently, the car review media have actually tested engineering vehicles with V8 engines, and the actual measured speed of V8s can reach 30,000 rpm. However, the relevant test is a limit test, and we continue to calibrate the rated RPM of V8s to 27,200 rpm.
15. How does Xiaomi's super engine reach 35,000 rpm? Is this the first time Xiaomi has made a motor that is better than Tesla and others?
    Behind the high speed of 35,000 rpm lie innovative efforts in structural design, materials technology and many other aspects, the most critical of which is that Xiaomi has used "laser in situ solidified carbon fibre winding technology" to innovatively design the rotor shells of the high-speed motors and obtained the relevant licensed rotor patents.

    Compared to the wet winding method of carbon fibre, which requires the use of resin for curing after winding. Xiaomi's laser in situ curing winding process does not use carbon fibre raw fibres and resin glue, but carbon fibre prepreg tapes wound on the same. Workstation equipment The laser is used to harden the carbon fibre prepreg tape. The process is simple, can be carried out at a single station and the tension is maintained directly during the winding process.





16. Indeed the CTB reverse battery cell the first in the industry?
    Battery cell reversal has been done before in the industry, as has the reversal of pressure relief valves. However, the first two CTB cells that were simultaneously reversed were fully reversed, which has never been done before. This technical solution pioneered by Xiaomi ensures maximum battery safety and maximum space utilisation.

    CTB stands for Cell to Body, which is the design capability of car manufacturers. It is not just a technology for battery manufacturers. It's the way the battery pack and the body are built together. The top cover of the battery pack is directly the floor from the passenger compartment. Xiaomi has 36 basic patents. The CTB integrated top cover, the sidewall design, the bottom protection, the composite fibre dragon spine and other structural designs are all designed by Xiaomi. Low-conductivity coolant, battery management software and car-cloud integrated safety warning system, high-voltage architecture and so on are also designed by Xiaomi.

17. What are the concrete benefits of Xiaomi's CTB inversion technology solution?
    The Xiaomi CTB battery pack adopts an inverted battery cell design. Compared to a traditional vertical battery cell, the pressure relief valve faces downwards. It is the only non-porous, high-strength steel top cover in China, and has the world's strictest thermal runner safety standards. This ensures that even in extreme conditions, the passenger compartment is completely isolated from the battery compartment in a safe condition.

    Even if heat escapes at 55 degrees Celsius, there is no open flame or heat spread. The pressure relief valve is downward facing and the non-porous top cover is the upper limit of the battery's safety protection capabilities.

18. How high is the aerogel content of Xiaomi batteries? Is it standard?
    The Xiaomi SU7 employs the industry's best 17 layers of high-voltage insulation protection and customizes the industry's most powerful active cooling technology: the dual large surface cooling area reaches 7.8 m², the highest in its class. This amazing figure is four times the industry average. At the same time, 165 of the industry's most advanced aerogel insulating materials, which can withstand temperatures of up to 1000°C, are layered on both sides of the battery core.

    During the test, our engineers were extremely confident in the innovative materials and processes, daring to put their hands close to the aerogel material and fry it directly on the other side with a 1000°C spray gun flame, and it was still intact.

19. Some netizens are wondering if the Xiaomi SU7's thermal management is adapted to low temperatures and only works at -20°C. Is this true?
    There are currently no strict standards for the scope of heat pumps in the industry. Some companies claim that they can withstand temperatures as low as -30°C. In reality, they are not pure "air source heat pumps" but heaters or water source heat pumps.

    At the Xiaomi Auto Technology Conference, it was revealed that at -20°C it relies on a pure air heat pump and can still extract heat from the air.

    If we follow the same calibre as mentioned by the companies involved, and add heaters etc, the overall thermal management capabilities of Xiaomi cars can adapt to temperatures as low as -30°C or even lower. Therefore, Xiaomi Motors can challenge the "king of winter trams" and it can be said that "trams are no longer afraid of cold winters".

20. Is the Xiaomi Auto Modena platform entirely in-house developed?
    The Xiaomi Auto Modena platform is Xiaomi's entirely in-house developed automotive platform, there have been rumours before that Xiaomi Auto uses other car makers' architecture, which is completely untrue.

    At the start of the research and development of the Xiaomi Auto Modena platform, 100 "first", "only" and "most" design goals were set. Xiaomi Auto also shared some of the results with everyone at the Xiaomi Auto Technology Conference, while more results will be announced, Xiaomi will report in detail after the official launch of the car.

    To be continued...