Produced by Tiger Sniff Car Group.
Written by Li Wenbo.
Edit thoughtful.
Header image of the Xiaomi car press conference.
Porsche, a German luxury car, never imagined that it had been repeatedly beaten by various new Chinese car-making forces for a whole year, and that it would have to work overtime during the Christmas holiday.
This time, it was Porsche who was "forced to go on the clock".The name is electrified and car-oriented, and Lei Jun is destined to build a car.
With only three days left in 2023, Lei Jun finally held the first public press conference in the true sense of Xiaomi Auto. This time, you can send it out as much as you want, not only do you not have to lose 3 million, but you may have the opportunity to earn 300,000 in the future. After getting rid of the shackles of the "Letter of Confidentiality Commitment", the inside and outside of the National Convention Center were filled with a happy air.
However, Lei Jun, who said the car for the second time, seems to be far less happy than the ** friends who have talked about cars all their lives. The 54-year-old Lei Jun is a 54-year-old Lei Jun, who gambles on all the achievements and reputation of his life's "last venture", and nervousness is inevitable.
Before today's press conference, which is known as "only technology, not products", Lei Jun has driven 150 cars, and more than 3,400 technicians of Xiaomi Auto have spent more than 10 billion yuan to develop for 1,003 days.
If you don't hand in the papers, it's a bit too much to say.
Teach lessons to Chinese autobots.
At the beginning of this press conference without jeans for the first time in history, Lei Jun first recalled his "wholesale tribute" to some Chinese car companies on social ** the day before. Then, in response to a question with "ulterior motives":
Why not pay tribute to FAW, FAW, Changan, SAIC, GAC, BAIC, Great Wall, Geely, and Chery?
Lei Jun said that when he decided to make a car, he immediately visited these pioneers of China's automotive industry door to door and expressed his respect in person.
I don't really despise this kind of "differential treatment". The saying of high emotional intelligence is: respect for the old-timers. The saying of low emotional intelligence is: see people serving dishes.
Car companies with topics are engaged in a wave of "cyber tribute" on Weibo to harvest a wave of traffic. Car companies that have no topic will meet offline, mention it at the press conference, and harvest another wave of traffic.
Being a person inside and outside does not suffer losses, and word-of-mouth traffic is a bumper harvest.
This episode makes Xiaomi cars look less sincere than Xiaomi mobile phones, but Lei Jun's detailed analysis of the five core technologies of electric drive, battery, large die-casting, intelligent driving, and intelligent cockpit made me regain confidence in the sincerity of Xiaomi cars.
Because,On the PPT, they are too hard.
Let's start with electric drives.
Although it is known as "super", the motor design idea of Xiaomi car has not jumped out of the common "roll speed" in the industry: that is, by increasing the speed, the performance of the permanent magnet synchronous motor is enhanced.
For example, Tesla Model S Plaid pulls the motor speed to 21000 rpm, Zeekrypton 001FR turns it to 20620 rpm, and Huawei directly increases the speed of the new generation of motors on the Zhijie S7 to 22000 rpm, which can actually rise to 25000 rpm, retaining 3000 rpm for safety reasons.
The speed of the three motors announced by Xiaomi Auto this time, V6 and V6S, is 21,000 rpm, which is much stronger than the Porsche Taycan Turbo. Among them, the V6 super motor has a maximum power of 220kW and a peak torque of 400N·m, and is built with a 400V architectureThe V6S super motor has a maximum power of 275kW and a peak torque of 500Nm, and is built with an 800V architecture. The V6 and V6S motors have already been mass-produced and will be installed on the Xiaomi Su7.
The other is the V8S, with a speed of 27200 rpm, which is indeed the first in the industry from the book alone. We know that increasing the speed of a motor requires a higher strength rotor, a higher speed of the toothed shaft, the bearing, and the most efficient heat dissipation. Xiaomi Auto's approach is to use a 960MPa high-strength stator silicon steel sheet and two-way full oil cooling to dissipate heat, which improves the heat dissipation efficiency by 50%.
At ultra-high speeds, the Xiaomi Super Motor V8S has amazing data on paper: peak power of 425kW, peak torque of 635 Nm, and conversion efficiency of 9811%, power density 1015 kW per kilogram, far more than the Tesla Model S Plaid of 622 kW per kg. The V8S will be in production in 2025.
And, of course, there is the carbon fiber laser winding process motor, which has been pre-developed in the laboratory and has a speed of 35,000 rpm. There is currently no definite timetable for mass production.
Let's look at the battery.
As the most expensive component of an electric vehicle, the battery pack accounts for 40-50% of the total cost of the electric vehicle. If you want to build a good electric car, you must first build a battery pack.
Xiaomi Auto is the first to use the true 800V silicon carbide high-voltage platform with a maximum voltage of 871V to lay the foundation for super fast charging. Secondly, the CTB integrated battery pack jointly built with CATL is adopted, and the thickness of the battery pack and floor is only 120 mm, the wiring harness is reduced by 91%, and the wiring harness is reduced by 3% of the vehicle space.
In terms of battery technology, Xiaomi's battery pack is highly malleable, and the current chemical system has a maximum capacity of 150 kWh, and CLTC has a range of 1200 kilometers, but it is very expensive and can only be used as a demo battery pack. Large-scale sales of battery packs, mature technology, 132 kWh, CLTC range of more than 1000 kilometers. Using the inverted battery cell technology on CATL's Kirin battery, in extreme cases, the pressure relief valve releases heat downward to ensure safety.
Lei Jun said that Xiaomi, as a native of the northern car company, is determined to become the "king of winter tram battery life", so it uses a dual-mode heat pump, which can not only heat the cockpit alone, but also heat the cockpit and battery pack at the same time, with higher thermal management efficiency.
Whether the Xiaomi Su7 is the king of winter battery life measurement, no one can say conclusively. But on ppt, it definitely is.
Look at the big die casting.
As a symbol of a new era of automobile manufacturing opened by Tesla in 2020, one-piece die-casting has long become the production standard for high-end smart electric vehicles. The clamping force of Xiaomi's super large die-casting is 9,100 tons, which exceeds the 6,000 tons of Tesla's Shanghai factory and Tesla's 9,000 tons in the United States.
In order to solve the shortcomings of integrated die-casting "without collision", high difficulty and high cost of maintenance after collision, Xiaomi Auto has designed a three-stage anti-collision design in the structure, that is, low-speed collapse area, medium and high-speed collapse area, and integrated die-casting rear floor. In the event of a minor or moderate impact, there is no need to replace the rear floor, reducing repair costs.
Let's look at intelligent driving.
This is the technology track that Xiaomi Auto focuses onLei Jun's goal is to enter the first camp of the intelligent driving industry in 2024.
In terms of perception, Xiaomi has developed its own zoom BEV technology, which can dynamically adjust and perceive the near, medium and far ranges like the human eye, so that you can see far at high speed and near the basement. In terms of intelligent driving hardware, Xiaomi cars are equipped with two NVIDIA Drive Orin chips, with a total computing power of 508TOPS, 1 lidar, 11 high-definition radars, 3 millimeter-wave radars, and 12 ultrasonic radars, a total of 27 perception hardware. Among them, the LiDAR adopts Hesai Technology's integrated LiDAR, which is placed in a watchtower-like position and has a cobblestone-like appearance.
Based on the chip and perception hardware, Xiaomi Zhijia adopts the latest generation of underlying algorithms: BEV+Transformer + occupancy network, and fully integrates large model technology. Among them, the self-developed end-to-end perception decision-making model has been applied to production vehicles for the first time in the world05m of mechanical storage location.
In terms of intelligent driving ability, Lei Jun is very confident, he said that Xiaomi has been rolled up since he was a child, and he will be the first in the industry if he wants to do it.
Finally, let's look at Xiaomi's housekeeping skills: smart cockpit.
Hardware-wise, the Xiaomi su7 is equipped with 161-inch 3K ultra-clear center display, large 56-inch HUD, flip-out instrument screen. There are really no highlights on a single look, but Lei Jun's idea is to get on the car with a large tablet, directly solve the compatibility problem, and let users have an immersive interactive experience consistent with the mobile phone and tablet.
Here are three examples:
The multi-task flexible frame of the in-vehicle interface supports resizing the windowThe co-pilot can slide down the control center from the right side and directly adjust the co-pilot's seat and air conditioning, which is very user-friendly.
The mobile phone is connected to the car machine across the end, and half of the ** watched on the mobile phone, you can directly continue the full-screen broadcast on the car machine;Use the customary navigation app to call out the phone, which can be displayed in full screen. Handcar interconnection, Magic Desktop, screen sharing, navigation flow, the main one is a "one pull".
You can "PIN to the car" of any mobile app and present it directly in the form of a native card. You can simply think of it as mi carplay. In addition, it can also be connected to the Xiaomi Pad ecological expansion screen to create a five-screen linkage space in the car.
At the same time, Xiaomi also showed the pattern of Apple users: Xiaomi cars fully support wireless CarPlay, and can also realize video and audio streaming based on AirPlay, as well as iPad rear expansion, control air conditioning,** and seats.
Behind all this is Xiaomi's full-stack self-developed Modena technology architecture. Lei Jun's confidence in the structure is bursting, he said, "With this structure, it is not a problem to be cut off by friends in advance." ”
I don't agree with this, whether it's a matter or not, it depends on who the friend is.
The first "BMW 5 Series" for young people
With architecture, technology, and innovation, it finally has to fall into the real car, the SU7. Lei Jun positioned this car as:C-class high-performance eco-tech sedan.
We have to look at this positioning backwards.
Why is it a car, Lei Jun believes that the car is the spirit of the times, so he firmly chooses to make a car. And it's easy to build a low car, but it's hard to build a high car, so Xiaomi must choose the difficult but correct path.
In terms of technology, there are too many, let's pick a trunk volume that most people don't pay much attention to as an example: the trunk volume of Xiaomi Su7 is 105L, which exceeds the 89 liters of the Model S and the 84 liters of the Taycan, which may be the largest pure electric car in the front trunk of the Chinese market at present.
In terms of ecology, the Mijia device is connected to the account without password, and there is no sense to get on the car. The central control screen, storage table, seat back and other positions support hardware expansion, plug and play. Moreover, the Xiaomi Carlot ecosystem is open to global ecosystem developers, providing a unified standardized interface, communication standard protocol, and system underlayer.
High performance can be said, Xiaomi Su7 is equipped with front and rear dual motors, four-wheel drive, maximum horsepower of 673PS, peak torque of 838N·m, and 000 acceleration 2In 78 seconds, the top speed is 265 km h, which is completely ahead of the Porsche Taycan Turbo. Front double wishbones, rear five-link suspension, CDC shock absorber gas spring, 100-0km h braking distance of 333 meters.
Interestingly, the Xiaomi Su7 supports ten customizations including acceleration, steering, suspension height, suspension damping, front and rear drive distribution ratio, energy ** ratio, etc., with a gear accuracy of up to 100 levels, and all parameter combinations can provide 16800 million driving modes.
In terms of battery life, the Xiaomi Su7 uses a CATL 101-degree battery pack, which has a range of 800 kilometers under CLTC conditions. With 800V Super Fast Charging, it can last up to 510 kilometers on a 15-minute charge.
The C grade is the most interesting part. Lei Jun said that the SU7 is the size of the BMW 5 Series, which was originally called SU5, but I felt that this naming would be taken advantage of by friends, so it was renamed SU7 instead.
The design team led by Chief Designer Li Tianyuan (former BMW world's first Chinese designer, representative work: BMW IX), Qiu Zhen, head of exterior design (former senior exterior designer of Mercedes-Benz German headquarters, representative work: Mercedes-Benz Vision EQXX), and head of interior design Shin Muto (former BMW senior interior designer, representative work: BMW Z4).
Together, they have enabled the Xiaomi Su7 to achieve the lowest drag of any production car in the world today: CD 0195。
I don't care about the wind resistance, what I care more about is that these designers are all from BMW and Mercedes-Benz. Later, a phrase from the spiritual guide woke me up:
Which bimmer doesn't want a Porsche.
Okay, since it's all based on Porsche's drawings, let's not talk about what to do in the PPT to make a "design that can stand the test of time". After all, even this sentence is a tribute from BMW.
He is one of the world's top ten automotive designers, the father of the famous "Angel Eye", the former vice president of BMW, and the current design consultant of Xiaomi AutoChris Lack of Money Bangor commented on the Xiaomi Su7:
Well, I've heard the math.
Write at the end. At the end of the press conference, Lei Jun said something "heart-to-heart" to everyone as usual, such as:
For the past 1,003 days, I've often thought of the night of March 30, 2021, when we officially announced the build. In those days, I had a bad cold, my voice was hoarse, and it was very difficult to even speak before going on stage.
That night, when I stepped off the stage of the press conference, my mood was half flames and half seawater. It's so hard to build a car.
What we want to build is not an ordinary mediocre car, we want to build a dream car comparable to Porsche and Tesla.
I believe that one day, there will be Xiaomi cars galloping on every road in the world!
From the emotional point of view, the intensity of Lei Jun's heart is really full, and it is easy to make rice noodles climax. However, building a car is a very serious business activity, and before the day of mass production and delivery, feelings are just feelings after all. The last thing the world believes is the word "feelings".
After all, if you can build a good car by writing a "small composition", Tiger Sniff would have been the world's No. 1 car company long ago.
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