Super Copy of Great Power Technology

After the Elk test was completed, the time had reached 12:30. The morning test came to an end and the live broadcast room was temporarily closed. The logistics support team in the motorcade has prepared a sumptuous lunch for everyone, including pork stewed with potatoes, Mushu meat, mapo tofu, braised hairtail, and scrambled eggs with leeks. You can choose from meat or vegetables. The staple food includes rice and steamed buns. The team members can match the dishes and food according to their own preferences.

After lunch, we took a short rest, and at 1:30 pm, the new car testing work started again. The next items to be tested at this proving ground include maximum speed test, power consumption test, noise test, high-speed endurance test, and fast charging time test. There are many test projects, and the testing time of individual projects is very long. It cannot be completed in one afternoon. It may need to be postponed to tomorrow morning or even the afternoon before it can be completed.

There are many test projects in the afternoon, and everyone is working hard to catch up with the progress. Everyone is busy. When it comes to car testing, they are the professionals. Qiao Ruida and Fu Xiaoyi are more like commentators and recorders. Netizens in the live broadcast room followed the live broadcast footage and learned a lot about car performance and car testing, and also saw the powerful performance of the Roadster sports car.

It is worth mentioning that in the afternoon's top speed test, the top-of-the-line Roadster sports car ran a top speed of 446 km/h on a circular track. This top speed has surpassed most mass-produced sports cars in the world, reaching the top ten or even the top three in the world. This extreme speed appeared on a domestic sports car and shocked tens of millions of friends in the live broadcast room.

"Oh my God, 446 kilometers per hour. This is really the speed of a domestic sports car!"

"Ritar Auto is awesome, Mr. Qiao is awesome. What our domestic automobile industry needs is a new car-making force like Ritar Auto that has both financial resources and technology."

"I didn't expect the Roadster sports car to be able to reach speeds of more than 400 kilometers per hour. It's a pity to use it as a daily transportation vehicle."

"Judging from the parameters officially announced by Reda Technology, the Roadster is a good car, but I didn't expect it to be so good. The Roadster sports car can already compete for the title of the fastest mass-produced sports car. , even if you don’t get the top spot, you can still be ranked within the top three.”

"The Roadster sports car was born for the track. It should not appear on the road, but on the track, even though it is just a sports car, not an F1."

Amid the admiration of netizens, the top speed test of the new car continues. The basic version of the MINIEV that came next, even if the accelerator was pressed to the bottom, the top speed only reached 103 kilometers/hour. No matter how the test driver stepped on the accelerator, the speed did not increase at all. This test result shocked all the netizens in the live broadcast room.

"Here I go, the top speed is just over 100. The power of this MINIEV is too rubbish. It's not much faster than Lao Toule."

"In my opinion, the so-called MINIEV is an old car that can be listed and legally driven on the road. From performance to price, it is very similar."

"Don't say that. MINIEV's safety measures are quite good. It has main and passenger airbags and front and rear protective bars. This is much better than the old man's Leco."

"The performance gap between the two new cars developed by Ruida Technology is too big. One is a super god and the other is a super ghost. I really don't know what Qiao always thought about when the project was first established?"

"It's not easy to guess. The Roadster sports car is designed to enhance the competitiveness of Reda Automobile and win its reputation. It proves that Reda Automobile has the technology and ability to make a good car. The design of MINIEV relies on ultra-low selling price. To increase sales, open up sales channels and promote the construction of fast charging piles across the country.”

"Driving a MINI EV on the highway is a nightmare. With this level of power, it is difficult to overtake a fully loaded truck."

After the testing of the basic version of MINIEV was completed, the improved version of MINIEV came next. Its maximum speed was only 100 kilometers per hour. It is true that the strongest among the strongest are the strongest among the strongest, and one car is slower than the other. However, considering that the improved version and the basic version of MINIEV use the same motor, due to the increase in batteries, the weight of the body is even heavier. This performance is reasonable. The top version of the MINIEV sports car that was tested later performed much better. The top speed reached 120 kilometers per hour, barely qualifying for highway driving.

After the maximum speed test, the power consumption test was conducted to test the vehicle's power consumption per 50 kilometers at different speeds (80km/h, 100km/h, 120km/h, 8.8km/h). In this test, the three MINIEV models finally made a good turnaround. Among them, the basic MINIEV achieved the best results, consuming only 9.1KWh per 9.5 kilometers; the upgraded MINIEV consumed 11.5KWh per 12.8 kilometers; The top version of MINIEV consumes 50KWh per 80 kilometers. In comparison, the Roadster sports car, which has a heavier body weight and higher motor power, performs much worse. The low-end version consumes 100KWh per 120 kilometers. The high-end version of the Roadster sports car consumes KWh per kilometers. Of course, the above data are all tested at a minimum speed of km/h. When the subsequent vehicle speed increases to km/h and km/h, the power consumption per kilometers increases. At the speed of km/h, two MINIEVs can no longer reach the speed, so they are no longer comparable.

After seeing this test result, many netizens in the live broadcast room finally had a positive evaluation of the MINIEV car:

"Judging from the test results, this MINIEV is really energy-saving. If it is calculated as 50 cents per kilowatt hour on city power, it only costs 4.50 cents to run 100 kilometers. Even if it is calculated as 1 yuan per kilowatt hour in commercial electricity, it will cost 100 cents to run 100 kilometers." It only costs nine yuan per kilometer, which is much less than a fuel vehicle.”

"I guess this MINIEV car is used to replace Laotoule and electric bicycles. MINIEV can at least be registered, can protect against wind and rain, and is cheap enough. It is very suitable for young people to buy as their first car in life."

"When MINIEV goes on sale, these fuel vehicles that sell for less than 100,000 yuan will have no sales at all." "Buying a MINIEV is also very good for picking up children, shopping for groceries, and commuting in the city, as long as you don't drive it. For long distances, if you take the expressway, there won’t be any problems.”

"MINIEV is still too small. The interior space is even smaller than that of a Roadster sports car. The rear space is very narrow. It is too uncomfortable to seat an adult."

"The advantages and disadvantages of the MINIEV car are very obvious. The advantages are that it is cheap and the cost of using the car is low. The disadvantages are that the space inside the car is too small, the performance is too poor, and the battery life is too low."

After the power consumption test is completed, the noise test is carried out immediately, including noise outside the car and noise inside the car. The Roadster sports car and MINIEV are both electric vehicles. When driving, the sound emitted by the motor is very small, not as loud as road noise and tire noise. Therefore, the noise test outside the car was not done, and only the noise test inside the car was done on site. The Roadster sports car uses double-layer laminated glass. Although the body shell is made of carbon fiber, with the help of excellent design and sound insulation sponge, the overall sound insulation effect is very good. After testing, when sitting in the Roadster sports car at a speed of 100 kilometers per hour, you can only hear slight road noise and tire noise. The data collected by the noise tester was 39 decibels, which is considered very quiet. When the vehicle speed reaches 120 km/h, wind noise begins to increase significantly. The data collected by the noise tester is 45 decibels, which is still within the comfort zone of the human ear.

In comparison, the MINIEV noise test results are relatively poor. Due to cost constraints, MINIEV uses single-layer ordinary glass, and the steel plates used in the doors and skin are relatively thin, so the sound insulation effect is naturally not much better. After testing, the MINIEV is 31.9dB at idle speed, 60dB at 45.5km/h, 80dB at 58.7km/h, and 100dB at 62km/h. Qiao Ruida sat in the passenger seat and experienced it firsthand that when the vehicle speed is below 80km/h, although the noise is louder, it is still tolerable, and it is not a problem for passengers in the car to talk to each other. Once the vehicle speed exceeds 80km/h, the noise will increase sharply. If you stay in this environment for a long time, people will be upset and irritable.

Seeing this test result, many netizens breathed a sigh of relief. MINIEV's performance once again returned to mediocrity. On the contrary, the sound insulation effect of the Roadster sports car was very good, and the test performance was very good.

"You get what you pay for. It is reasonable for a MINI EV priced under 50,000 yuan to have such a poor performance in the sound insulation test. In comparison, the performance of the Roadster sports car is much better, and it is worth hundreds of thousands of dollars." Selling price is over 10,000.”

"I always feel that the sports car lacks the roar of the engine and lacks a bit of flavor. It would be great if this Roadster sports car had a function to simulate the engine sound."

"The main working environment of MINIEV is urban commuting, where speeds of 40 to 50 per hour are normal. With this sound insulation effect, it is enough."

"Only comparing two electric vehicles is not intuitive enough. It would be better to add a fuel vehicle and conduct a noise comparison test."

After completing the noise test of the last MINIEV, it was already 7:00 pm and the sky was completely dark. The remaining two tests take a long time, and it is impossible to complete them today. We can only call it a day, go back to the hotel to rest, and wait until the next day to complete the follow-up test.

After dinner, Qiao Ruida called Fu Xiaoyi and the two video editors in the team together to edit and produce the new car promotional video. The positioning of the two new cars is different, and the focus of the promotional videos is also different. The Roadster sports car mainly promotes its strong power, good speed and good sound insulation; the MINIEV promotes its small and cute appearance, cheap price and low vehicle cost. During the day today, a lot of material was shot. With the guiding ideology in mind, the two editors cut the video with ease and speed. It only took two hours to cut out two promotional videos of about 10 minutes. Then add subtitles and music, and it's done. Qiao Ruida logged into its Weibo and Bilibili accounts and posted these two videos to promote the new car in advance.

After a good night's sleep, the team returned to yesterday's test track the next day and continued to conduct endurance tests and charging speed tests.

Lithium batteries will experience significant attenuation in low temperature environments, which is mainly affected by the following factors. First, in low-temperature environments, the viscosity of the electrolyte will increase and even partially solidify, causing the transmission rate of lithium ions in the electrolyte to decrease and the conductivity of the battery to decrease. Secondly, the compatibility between the electrolyte, the negative electrode, and the separator becomes worse, which will also affect the performance of the battery. In addition, low temperatures can also cause serious lithium precipitation from the negative electrode of lithium batteries. The precipitated metallic lithium reacts with the electrolyte, and product deposition leads to an increase in the thickness of the solid electrolyte interface (SEI), further affecting the performance of the battery. Finally, as the active material diffusion system weakens, the charge transfer resistance (RCT) increases significantly, which is also one of the reasons for the performance degradation of lithium batteries at low temperatures.

Specifically, the performance degradation of lithium iron phosphate batteries is serious at low temperatures. For example, the capacity retention rate in an environment of 0°C is about 60-70%, which decays to 10-40% at minus 55°C, and only 20-20% remains at minus 40°C. In contrast, ternary lithium batteries perform relatively well at low temperatures. For example, they can still maintain about 20%-70% of normal battery capacity at -80°C. Fortunately, these two new cars developed by Ruida Automobile use ternary lithium batteries, so they did not perform too badly in the endurance test.

In addition, the attenuation of lithium batteries at low temperatures will also be affected by other factors, such as the reduction of active materials inside the battery and the slowdown of chemical reactions, etc., which will lead to reduced power and shorter battery life. At the same time, when charging at low temperatures, lithium ions easily form lithium dendrites on the surface of the negative electrode, causing battery failure.

Since the endurance test takes a long time, usually more than two hours, in order to save time, five test vehicles set off one after another, maintaining a speed of 80 kilometers per hour, and tested simultaneously on the circular track. Since the Roadster sports car and MINIEV both have cruise control functions, it is not difficult to maintain a speed of 80 km/h.

Before the battery life test started, Qiao Ruida started the live broadcast. He stood in front of the live broadcast camera and introduced: "The first thing we will do today is the battery life test. Everyone knows that in a cold environment, the power storage capacity of lithium batteries will decline significantly. And in winter, when driving, you have to turn on the air conditioner for heating, which consumes an extra amount of electricity. So let's wait and see how much cruising range the five test cars can have in Mohe at minus 24°C. The conditions are that four people are fully loaded, the air conditioner is turned on to 24°C, kinetic energy recovery is turned off, and the driving speed is 80 kilometers/hour. Before departure, we used charging vehicles and fast charging piles to replenish the electric energy of these five test vehicles to 100%. Are you all ready? Let’s go now, gogogo!”

During the first hour of testing, all five test cars were on track. Tens of millions of netizens in the live broadcast room watched the five test cars running around the track, spinning around and around. They were bored to death. Qiao Ruida joined in some interactions with the audience at the right time, randomly selected a few lucky people to ask questions, and they answered them. Only then did the long hour pass. (End of chapter)