Xiaomi Su7 bombs the car circle
Written by Wang LeiEdited by Qin Zhangyong
Announced the construction of a car1003 daysLater, the Xiaomi car is finally here!
This afternoon, Xiaomi Auto held its first press conference in Beijing, and the data was indeed enough to make rice fans scream.
For example, the 000 acceleration of the su7 reaches 2In 78 seconds, Xiaomi super motor V6, V6S, the speed reached21000 rpm.
At the same time, it also has self-developed CTB battery technology, a new super 800V silicon carbide high-voltage platform, and the highest voltageUp to 871V, it can be said that it is a quasi-900 high-voltage platform.
These hard-core technologies announced today include motors, batteries, large die-casting, automatic driving, and five technologies of intelligent cockpit, although Xiaomi did not have much accumulation in traditional car manufacturing before, but with the ability to make money and the appeal of Lei Jun, these technologies are all the most advanced without exception.
Of course, it also contributed a lot of hot searches, such as Lei Jun made it clear that the goal of Xiaomi Auto is to beComparable to Porsche, Teslato create a dream car in the new era.
With 15 to 20 years of effortBecome one of the top five automobile manufacturers in the world and strive for the comprehensive rise of China
This goal is indeed great enough, but after 15 years, Lei Jun will be close to 70 years old.
As for the ** of Xiaomi car su7, it is not 90,009, nor 140,09, according to Lei Jun's original words, "We still have to respect technology." ”
What kind of car is it?
said that he would not release products, only talk about technology, but he couldn't help but spoil it.
Talking about why he chose the first car as a sedan, Lei Jun said that there is a saying in the industry that "high cars are easy to get low cars", and cars are the "spirit of the times".
In other words, because it is more difficult to make a sedan than an SUV, Xiaomi chooses the difficult and correct path, and hopes that Xiaomi will create a car that can stand the test of time.
Zero Hundred 278 seconds
Let's first take a look at the specific information of Xiaomi's first model, the SU7.
Xiaomi SU7, positioned as a C-class high-performance eco-technology sedan, is 4997mm long, 1963mm wide, 1440mm high, and has a wheelbase of 3000mm, which is about the same size as the BMW 5 Series in terms of body size, and a full circle larger than the B-class car Tesla Model3.
The Xiaomi su7 announced by Lei Jun at the press conference has two versions,Standard vs. Max, simple and easy to understand.
Interestingly, Lei Jun ridiculed at the press conference, the naming of the rim is exaggerated, there is no standard version, it is pro, max, all kinds of exclusive versions...
The SU7 MAX version is equipped with dual motors for all-wheel driveThe peak power is 495kw, and the maximum horsepower is up to 673ps, the peak torque is 838N·m, which is equivalent to 40L turbocharged V8 engine performance, 000 acceleration only2.78 secondsto step into the 2-second supercar club.
And for the tram, it is difficult to achieve both zero hundred acceleration and the top speed, but under the strong motor performance developed by Xiaomi, the maximum speed of Xiaomi Su7 has been reached265km/hThe acceleration strength of the middle and rear sections is also good, with only 10 for 0-200km h67 seconds.
Not only can it run fast, but it also has to brake, and its braking distance of 100-0kmh is 333 meters. At the same time, as a C-segment car, its turning radius is only 57 meters, while the Medel 3, which is one size smaller B-segment car, has a turning radius of 59 meters.
It is equipped with a battery that took Xiaomi and CATL more than two years to develop, and it is currently the only four-wheel drive model in the Chinese market that reaches 800km in CLTC mode with a power of 101 kWh. With the blessing of 800V super fast charging,It has a range of 510 km in 15 minutes of charging
In addition, there is a custom driving known as infinite degrees of freedom, including acceleration, steering, suspension height, suspension damping, front and rear drive distribution ratio, energy ** ratio and a series of functions can all be adjusted by themselves, and even the gear accuracy is up to 100 levels, all parameter combinations can be provided together16.800 million driving modes
This number is indeed exaggerated, but it is a matter of opinion for the actual driving experience.
There is also a special mode on the Xiaomi Su7, called"Boost mode".When accelerating and overtaking, press the red button at the bottom right of the steering wheel, and the vehicle can immediately accelerate and last for 20 seconds of excess torque output, which is very similar to Porsche's "chicken blood mode".
Under the powerful performance, the chassis cannot be ambiguous. In terms of hardware, Xiaomi Su7 is equipped with front double wishbone and rear five-link independent suspension, equipped with CDC shock absorber, air spring, Bosch DPB+ESP100 fully decoupled braking system.
However, the parameters introduced by Lei Jun at this press conference are basically the MAX version, and the standard version uses a single-motor rear-wheel drive version and zero hundred5.28 seconds, carried 736-degree lithium iron battery, CLTC working condition 668km range, using 400V platform.
Lei Jun was also a little helpless at the end of the press conference, "Don't shout 90,009, it's impossible!."Lei Jun further said that anyone with this kind of performance and configuration has to be more than 400,000, so 140,000 9 don't need to talk about it anymore, "You still have to respect technology!."”
Designed to stand the test of time
Lei Jun said,Xiaomi wants to make a design that can stand the test of time,Even if you look at it in ten years,Look at it again in fifty years,It's still durable,So a lot of thought has been spent on the design of proportions,Su7 has achieved 3X wheel axle ratio,2X wheel height ratio,1.36x aspect ratio.
In addition, Lei Jun also gave the audience a high math lesson at the press conference, not only popularizing the science of how the wind resistance coefficient comes about, but also pulling out the calculation formula of wind resistance to explain how the wind resistance coefficient is designed by Xiaomi cars.
The SU7 MAX has 8 sets of air ducts and 17 air vents up and down, and the rear electric rear wing can provide 130 kg of downforce at the highest speed, finally showing the lowest drag coefficient of a car in the worldcd 0.195
This is higher than the previous production car with the lowest drag coefficient in the world, GAC's Haobo GT (0.197) and lower.
There are also some family features, such as teardrop-shaped headlights, halo taillights, 175-degree ripple curves, semi-hidden door handles, etc.
The SU7 is currently available in three colours, namely Bay Blue, which is taken from the colour of 60 meters below sea levelYa gray, originated from the gray rock formation in the Yadan landform;Olive green, taken from nature.
Of course, the design language that Lei Jun can be proud of, the strength of the design team behind it cannot be underestimated, and Lei Jun also specially introduced his design team one by one at the press conference.
The team is very young, but they are all big names, first of all, the chief designer of the SU7, Li Tianyuan, is the first Chinese designer in the world of the former BMW, and the early design of BMW's ix and 7 series was completed by him.
Qiu Zhen, the head of exterior design, is a former senior exterior designer at Mercedes-Benz's German headquarters, and his representative works include Mercedes-Benz Vision EQXX;Head of interior design, Shin Muto, is a former senior interior designer at BMW, who was responsible for the interior of the BMW Z4. None of them are old, even some young, but they basically have more than 10 years of experience in car design.
Of course, the most important thing is that Xiaomi also invited what is known as "one of the top ten most famous car designers in the world".Chris Bangor"Served as a design consultant for Xiaomi cars. As the former vice president of design of top international car companies, he designed a series of classic designs such as angel eyes and flame curves, which opened BMW's "Bangor era".
In terms of interior, the Xiaomi Su7 Max is available in three interior colors: Galaxy Gray, Twilight Red, and Obsidian Black, with 16Large 1-inch touchscreen, 56-inch HUD, 7The 1-inch flip instrument screen, the rear seats expand the Xiaomi Pad X2, and it also has intelligent system integration, and the central control screen supports keyboard expansion, and it is also equipped with sporty seats and a traditional three-spoke D-shaped steering wheel.
Grasp the science and technology ecology
This press conference is divided into two parts, except for Lei Jun's surprise to everyone's "su7 pre-conference", in the first half of the whole press conference, Lei Jun spent an hour and a half focusing on technology.
Lei Jun believes that the outstanding intelligent electric vehicles of this era must do a good job in these three points: first of all, a good car that looks good, is easy to drive, comfortable and safe;Second, it is a movable smart terminal;Third, it is an advanced mobile intelligent space.
So under such a vision, Xiaomi has laid out five core areasElectric drive;Battery;Large die-casting;Intelligent driving；Smart cockpit. and as one of the underlying architectures of Xiaomi's "people, cars, and home ecology", the "Modena" architecture.
And shouted out the slogan that resounded throughout the press conference, "Through 15 to 20 years of hard work, we will become the world's top five automobile manufacturers and strive for the comprehensive rise of China!". ”
The industry's best motor
First of all, in terms of motors, at the beginning of the establishment of the Xiaomi car project, the first project was to make super motors.
Lei Jun said that a team of 100 experts was formed, two top motor companies were invited, and the most advanced AI technology was used to make two super motors at one timev6 and v6s。It is currently in mass production and will be installed on the first batch of Xiaomi SU7 models.
How super it is, just look at a set of data.
The rotational speed is reached21000rpm, two days ago, this was a very shocking data, but it was intercepted by a friend, and Lian Lei Jun was a little embarrassed at the press conference, "These things were originally planned to be released in August, but they were postponed to today, and they were also cut off by friends."
But even so, the speed of 21,000rpm still ranks in the first echelon of the industry, not only that, the Xiaomi team has optimized the stress distribution of the rotor structure topology and motor structure decoupling more than 200,000 times through AI technology, achieving a 77% slot filling rate, while reducing about 25% iron loss and achieving 0.3% efficiency improvement.
The two super motors are named V6 and V6S (HyperEngine V6 V6S), whereThe V6 super motor has a maximum power of 299PS, the maximum torque is 400Nm, and the maximum power of the HyperEngine V6S super motor is reached374psThe maximum torque is 500 Nm.
Now that they have all been cut off, the ambitious Xiaomi has also prepared a "killer feature".
Brought a third motor, directly called V8S, simple and rude. Its rotational speed is up to27200rpmThis is definitely the fastest in the world.
Its maximum horsepower reaches:It has 578 PS, a peak power of 425 kW and a maximum torque of 635 Nm，98.The highest efficiency of 11%, the power density of the motor has reached 1014kw/kg。Even Xiaomi has applied for 155 patents for this motor, of which 60 have been granted.
In order to withstand ultra-high speeds, the V8S super motor uses the industry's first 960MPa highest-strength special silicon steel sheet, which is more than twice as strong as the industry's mainstream products.
However, Lei Jun also said that this super motor will not be available until 2025.
To be the king of winter endurance
The battery is the core and most expensive component of pure electric vehicles, Lei Jun said that the battery accounts for 40% or even 50% of the cost of the whole vehicle.
At the meeting, Xiaomi released the 800V SiC high-voltage platform jointly developed with CATL, and also specifically mentioned that there is no false standard, reaching 871V, which can also be called a quasi-900V platform.
It uses self-developed CTB integrated battery technology, plus the thickness of the floor is only 120mm, judging from the data of the press conference, the theoretical upper limit of the battery pack platform of Xiaomi cars reaches the maximum power of 150kWh, and the CLTC range is 1200+km, but in order to weigh the cost, the final battery capacity was selected 132kWh, which is still maintained1000+kmCLTC battery life.
In response to safety issues, Xiaomi has created an original technology - cell inversion. As the name suggests, the battery is placed backwards, which has the advantage that in the event of a thermal runaway of the battery, an open flame will rush to the ground instead of the cockpit.
In addition, it is supplemented by 17 layers of high-voltage insulation protection, 78m of the largest cooling area in its class, and 165 pieces of aerogel are used for thermal insulation to ensure the safety of the battery to the greatest extent.
After rolling up the battery capacity, the battery is safe, and the winter battery performance is also rolled up. Lei Jun also shouted the flag of "Xiaomi is determined to be the king of winter battery life of electric vehicles" at the press conference.
It is equipped with a heat pump system that draws heat from the cold outside air for energy supply. In addition, there is a three-source step-by-step heating technology that reuses the waste heat generated by the electric drive to achieve a maximum battery heating efficiency of 18kW.
Although the battery part is not as shocking as the motor, the card of winter endurance is indeed a pain point that many trams have not yet solved.
The one-piece die-casting ability is still strong
On the body, Xiaomi Auto has made another eye bag.
Xiaomi has developed its own Xiaomi Hypercasting super large die-casting technology, which is not high, and it is a little bigger than Tesla's largest integrated die-casting machine:9100 tons
Through 9 major processes, 60 equipment, and 433 process parameters, a large die-casting island covering an area of 840 square meters and weighing 1,050 tons is formed. Tesla's largest die-casting device is 17 percent larger. This is more than the tonnage (It's nearly half the size.
In terms of large die-casting, Xiaomi is foolproof. In fact, I did two sets of large die-casting and two sets of AB hardware. However, Lei Jun said that many technical experts from car manufacturers will be hesitant about this plan, but in order to ensure that nothing goes wrong, Xiaomi has made a C plan, which is a traditional plan.
In the end, Xiaomi still succeeded in making both sets of AB solutions. The entire die-casting island is about the size of two basketball courts, and half of the die-casting abrasives weigh 86 tons.
Behind the success, it is inseparable from Xiaomi's self-developed die-casting materials. Xiaomi's self-developed Titan alloy, the number of formulas has reached 10.16 million, and the actual number of tests has reached 1550 timesIt is the only automobile manufacturer in China that has mass production of self-developed alloy materials
Looking at this part, it all reveals a message: Xiaomi isIt's really not bad for money
Intelligent driving and intelligent cockpit
As a latecomer, the starting point must be high, and the investment in autonomous driving has already begun3.3 billion to 4.7 billion, calling Xiaomi's AI lab founded in 2016, the underlying algorithm also uses the current mainstream BEV + Transformer + occupation network algorithm and integrates it into the large model.
It was the first in technology to use a zoom BEV to enhance perception;Second, the super-resolution occupancy network is used to ensure accuracy, like many special-shaped obstacles can be accurately identified, and higher accuracy can also eliminate the impact of rain and snow on the occupancy networkThe third is Xiaomi's large road model, which generates topology in real time, does not rely on high-precision maps, and responds to road changes in real time.
At present, Xiaomi's autonomous driving team has more than 1,000 people, more than 200 test vehicles, and a test mileage of more than 10 million kilometers.
In terms of intelligent driving, at present, Xiaomi intelligent driving (Xiaomi Pilot) can achieve high-speed NOA and urban NOA, Lei Jun also demonstrated a ** on the spot, including urban NOA, valet parking and other functions.
In terms of hardware, two Orin-X chips, a lidar, 11 cameras, 3 millisecond wave radars, 12 ultrasonic radars, and comprehensive computing power reach508tops
Compared with these hardware, software is Xiaomi's real advantage, Lei Jun saidXiaomi car is the most important step for Xiaomi to complete the ecological closed loop of the car home
Based on the underlying interconnection foundation of the surging OS, the car is equipped with a 16The 1-inch 3K resolution 16:10 in-vehicle "large tablet" has the same immersive interactive experience as the mobile phone and tablet.
In addition, the large 56-inch HUD, the instrument screen that can be flipped over, and the rear row can also be connected to the Xiaomi Pad ecological expansion screen, creating a space for the linkage of five screens in the car.
Of course, it's not a simple screen overlay, based on the surging OS system, the mobile phone can be seamlessly connected with the car machine, for example, half of the ** on the mobile phone, you can directly continue the full screen on the car machine, and use the habitual navigation application to call out the mobile phone, and you can fill the full screen display.
However, Rebus's pattern is also very large, and at the end, he also brought a small easter egg, sayingApple users can also have a good experience driving a Xiaomi car
For example, Xiaomi cars will also support CarPlay, compatible with AirPlay, and also support iPad in the car, after the iPad is connected, it can be used as an expansion screen in the rear of the car to control settings such as air conditioning temperature.
This is very interesting, the Apple system can also be in the car,People can buy the first "Apple Car", so why do they have to be made by Apple?