Section 1: Let's not talk about technology, but say something that everyone can understand. I am a car critic who can accept all kinds of brainless netizens' criticism and I am used to it.
As a BYD? Black to pink? It's not too late to join the business. I have experienced the stage when BYD only knew how to make industrial waste. I have been writing articles to ridicule before, and netizens have followed suit. Seeing that it turned to active research and development, I began to interpret its electrification advantages. You also said that Pacific charging; Later, it became a national trend, and you suddenly turned 180 degrees and refused to accept any criticism of BYD.
Geely? The situation is the same.
Nine years ago, I participated in Geely's press conference at Jinan Auto Show for the first time, and newly launched modified models of Geely British SC3, British SC6 and British SC7. When I asked the media questions, I didn't ask the leaders of car companies according to the questions prepared by my sister PR, but pointed to the official information they gave me before and asked: Why did you say that there was a skylight before, but now it is reduced after it came out?
At one time, the scene was very embarrassing, and the leaders could only perfunctory that skylights were not commonly used, and more configurations could be made by using skylights less.
Later, it was not Borui (a hardware milestone) that completely changed Geely, but I was invited to visit Geely's Hangzhou Bay R&D Center in Ningbo at the beginning of 20 18. Then I used eight words to describe that experience? Go in with a smile and tears. Since I started my career, I have visited and read many automobile factories. This is the first time that I stole tears from a person with an engineering background.
In 2020, I went to Liuzhou to interview Zeng Qinglin, general manager of Dongfeng Fengxing. He told such an allusion: when popular employees went to a joint venture in Dongfeng for an exchange visit, they found out? Foreign adults? China people are not allowed to be present when debugging equipment and viewing drawings.
20 18 In Hangzhou Bay, I was very moved, because for the first time I saw that our own brand had a complete set of technology research and development centers, vehicle testing centers, powertrain centers and trial production centers, and finally we could get rid of the technology monopoly of foreign adults and seriously build our own good cars.
Remember the BYD F3 of the ninth generation Corolla? Later they changed it to Qin DM. In 20 13, I was the first media to run a full lap at Jingang circuit. After getting off the bus, I was puzzled. Can you imagine how easy it is to get out of control by putting 295 horses on the front axle of a fake Corolla? On the second generation of Tang DM, I finally became interested in BYD. Black to pink? .
Introduction, absorption and re-innovation.
This indomitable trilogy can be seen in BYD, Fengxing and Geely, and in most independent brands.
The question is, after so many years, why does Geely want to reduce its configuration?
Obviously, 800V is not supported at this stage, so can we honestly say that 400V is unacceptable? 3.8 seconds/526 km/266,000, I think it is very good, very, very good. Since the 400V voltage system can solve the problem, why blow 800V and then be unsubscribed by the user?
I have recommended Krypton 00 1 to three potential friends in Beijing/Shanghai, and told them to test drive at the first time. I also said that if I was late, I would have to wait for the bus for a long time. Now I find out that the clown is actually myself?
I dare to recommend it to my friends, on the one hand, because I have consulted my colleagues who have tested this car, and on the other hand, because I have sincere trust in Geely brand and trust Geely's positive research and development ability.
Forget it, let's go to the text. There are still many hard-core technologies, so don't erase them all at once.
Section II: Krypton 00 1 Interpretation of Battery Technology 1 400V Voltage Platform Let's talk about the voltage platform first.
Why is everyone so obsessed with 800V? Because Porsche has used it, so if you use krypton, it looks advanced?
No, because 800V is really better. Increasing voltage can reduce cable loss and increase cable load, and 800V voltage system can be faster? Power on? With what? Discharge? , the principle is as follows? The article is near the deadline, and the work pressure is greatly increased, so it is written quickly? Almost.
Now we use the mainstream voltage system in vehicle electrification equipment. I made a list for everyone to see:
Typical product line application scenario of voltage energy output power formula of vehicle voltage system 12V? 0.6 kwh? 5 kW lead-acid low-power power supply industry universal 24V? 1.2 kwh? 10 kW medium lead-acid power supply RV/ 36V for heavy-duty vehicles? 1.2 kwh? 15 kW lithium-ion high-power power supply basically stops using 42V? 1.5kWh？ 20kW lithium-ion high-power power supply basically stops using 48V? 1.5kWh？ 20kW lithium ion MHEV optical hybrid system
High-power power supply industry universal 90V? 0.5kWh？ 10kW lithium ion MHEV optical hybrid system
General group of high-power power supply? 200V？ 1.3kWh？ 100kW hybrid power system of Ni-MH hybrid electric vehicle
Drive and power HEV? 250V？ 1.6 kwh? 100 kw Ni-MH FCV hydrogen fuel
Battery car
Store electric energy and drive Toyota FCV? 350V？ 20kWh？ 200kW lithium ion PHEV embedded hybrid system
Driving and power PHEV? 380V 4 0- 150kWh？ Pure electric system of 300kW lithium ion battery
Drive and power BEV? 800V？ 100kWh？ 500 kW Lithium Ion Porsche 800 Volts
Pure electric system
The driving and power supply BEV is extremely krypton now. Let's distinguish between buildings and cars first. SEA's huge architecture itself supports 800V voltage platform? Because you also know that if the voltage goes up, the supply chain of the whole system and the whole charging infrastructure are not particularly perfect at present, so we think that the 400 volt voltage platform can better meet the actual travel needs of current users. ?
This passage is not made up by me now, but an excerpt from the official shorthand manuscript that my colleague GeekNEV got after attending the media communication meeting.
I don't think it's necessary to continue talking about this. Can the existing 400V be solved? 3.8 seconds /526 km/266,000? Buy it if you can accept it. If you can't accept it, go to BYD Korea EV and buy and sell freely.
Contemporary Ampere Technology Co., Ltd? Nickel 55? Batteries? Nickel 55? Is it ternary lithium battery, written in krypton? Ni55+？ In fact, the ratio of N-Ni /C-Co /M-Mn is 5/2/3. This kind of battery with relatively low nickel content will not run in reverse, but it is more stable and safer than high nickel battery.
Due to the increase of cobalt content, the purchase cost of nickel 55 battery will inevitably rise, but it has great advantages for end consumers. A power battery with very strong thermal runaway suppression ability can be obtained from krypton 00 1.
The following are four battery safety tests at the Krypton 00 1 Sandian Science and Technology Conference:
1, water immersion test: passed perfectly and can withstand long immersion.
2. Whole package needling: the battery core is in the package. After acupuncture, the highest temperature of the battery core is 80 1.4℃, and there is no fire, explosion or fire during this period. For consumers, the battery pack is punctured and you still have plenty of time to escape.
3. Thermal diffusion: NTP has no thermal diffusion and no fire technology. There is a battery in the bag that is heated to above 800℃, and once it smokes, it passes, and the heat diffusion is restrained.
4.4.9 meter fall: simulate the falling height on the viaduct, and the battery pack is not out of thermal control. However, the high-altitude falling in the real scene is definitely not downward, but oblique, and there will be an angle landing first.
How do the main safety measures achieve the above safety protection capabilities? Extreme krypton 00 1 uses the following six kinds of security protection:
? Thermal insulation: ultra-low thermal conductivity and thermal insulation materials are applied to form a super thermal insulation design between batteries;
? Exhaust: accurate CFD flow field model simulation, constructing barrier-free exhaust passage from explosion-proof valve of battery core to pressure relief valve in battery pack, releasing heat at the fastest speed;
? Prevention: BMS monitors the battery status in real time and collects the response quickly with high precision;
? P: If it is detected that the heat is out of control, it will immediately give an alarm, and the whole vehicle will give an audible and visual alarm and push it to the big data monitoring platform synchronously;
? Cold: after the safety warning of the thermal runaway system is triggered, actively start the liquid cooling cycle to cool the battery;
? Off: the external circuit is cut off in milliseconds to ensure that there is no high voltage safety risk.
In addition to the battery itself, the body structure is equally important. The following are the body safety technologies used by Krypton 00 1:
? Steel-aluminum hybrid body: ultra-high strength thermoformed steel +7 series aluminum alloy; The torsional stiffness of the car body reaches 40000N? Meter/degree.
? Devil collision test: 14 collision test item (6 items in national standard); 15 side column collision (GB 1)
? Safety strategy: bottom collision safety technology, 24km/h tilt 10% impact, 50km/h bottom overlapping 30mm impact; Positive 45? Off-wheel unloading force, positive 25% offset collision, actively cut off the high rigid front wheel; Head-on collision motor sinks; Exclusive high-speed rear-end collision design.
4 charging speed officially said that krypton 00 1 can support 360kW charging power, and the battery life can be increased by 120km after 5 minutes of charging, and it only takes 30 minutes to charge from 30% to 80%.
A five-minute fast charging demonstration was conducted at the technical meeting, and the current exceeded 500 A. This level of high current cannot be used in the existing equipment on the market at present, so users will get some discounts when charging on the charging piles of the State Grid. However, I think this argument is necessary, which at least proves that the high-voltage battery pack can tolerate large current of more than 500 A. In the future, when higher-power charging equipment is put into operation, these potential stocks will be the first to benefit.
The maximum charging rate can reach 2.2C, which is a pretty good figure.
The picture below shows the battery life and battery life after fast charging for 5 minutes, and the current is reduced.
About the charging speed, I wrote a bad article in detail before. Friends who are interested in adding drama to their new energy knowledge can click here to have a look:
Section III: Krypton 00 1 Interpretation of motor technology: 1 Is it a Nissan motor or a domestic motor? Another consumer's question about krypton 00 1 comes from the motor: Japanese oil-cooled round wire motor or Wei Rui water-cooled flat wire motor?
This problem broke out because the motor was declared first, and then Wei Rui Motor was declared, so consumers questioned whether you took it first. Foreign brands? Do a belief bonus, and then all of them will be replaced by domestic Wei Rui?
In fact, consumers are not talking nonsense, because the torque output of a single motor produced by electronics is 384N? M, awe of Wei Rui 342N? M, in numerical terms, is reduced.
So has it decreased? I don't know if the real car hasn't passed the market inspection, but I promise that no matter which motor I carry, the acceleration ability and power consumption level are the same, and I will also enjoy the lifetime warranty of the three electric systems.
2 Double Permanent Magnet Motor Krypton 00 1 Four-wheel drive version adopts front and rear double permanent magnet synchronous motors, and the rear drive version adopts single permanent magnet synchronous motors. The whole series does not provide AC induction asynchronous motors.
Permanent magnet synchronous VS induction asynchronous permanent magnet synchronous motor Induction asynchronous motor has better reliability, higher cost, lower power density and medium size, and is generally more robust than small and medium-sized structures. The peak efficiency is 95-97% and 94-95%. There is a problem. The permanent magnet synchronous motor has iron resistance, and if it is not energized, it will drag another motor, which means that it will consume electricity if it is not energized.
It may not be easy to understand just saying this. Let me put a picture. Did you see the second paragraph? Long battery life single motor? What about the third paragraph? Long battery life dual motors? The life of NEDC battery is known. Under the NEDC rule with so few high-speed working conditions, the same 100kWh battery actually ran out of the battery life gap of 712 km-606 km =106 km.
Of course, there is a reason to use double permanent magnet synchronous motors in krypton. The power density of Krypton permanent magnet synchronous motor is 6.05kw/kg, and that of induction asynchronous motor is much lower. Moreover, the advantage of the latter in high-speed performance is actually not used in the road speed limit regulations in China.
The automatic production of Krypton-3 electric technology conference also showed the production technology of motor stator on the spot. The automation level is very high. The stator winding of 204 copper wires can be plugged in only 400 seconds, and the yield is over 99%.
Section IV: Krypton 00 1 Interpretation of electronic control technology 1 Active temperature control electrode Krypton 00 1 Direct heat pump system and a new generation of battery active temperature control technology are standard, which can ensure the charging and discharging efficiency in various external temperature environments, on the one hand, reduce power consumption, on the other hand, extend the cycle life of batteries.
As for what this active temperature control system is like, there is no more detailed information at present, and why the temperature control system can prolong the life of the battery. The author just has two bad articles to share with you, and interested friends can enter the self-study mode:
2 cloud BMS polar krypton 00 1 equipped with self-developed cloud BMS system? Cloud, car end, pile end? Three-terminal cooperation, 7x24-hour battery doctor real-time diagnosis, guarantee? Polar core? Durability and safety of battery pack.
The BMS system is responsible for monitoring the state of the whole battery pack, providing communication, safety, battery balance and thermal management control for the power supply system, and extracting key parameters and uploading them to the cloud server to ensure the normal operation of the battery pack.
There are so many electronic control parts, and the information disclosed at present is limited.
Finally, as an auto media person, Krypton 00 1 is a car that I am looking forward to very much this year, on the one hand, because it comes from Geely, a hard-core brand in its own brand, on the other hand, because its current data is really good-looking, and on the other hand, because it looks good.
Although there were some unpleasantness in the booking process, we can't deny that this is a competitive model? Because it is not futures, it can be delivered in the fourth quarter of this year without waiting for many days.
At present, I very much hope to see that the commercial version of Krypton 00 1 can give more sincerity in marketing, rather than routine consumers. After all, routines are the daily life of some new forces, but they are not auspicious.
(Text: Huang Hengle)
@20 19