Finally returned to Donghai City, which had been lost for a long time, and they disappeared cleanly during the Spring Festival, and their families and friends all said that they were going to play, and then no one was worried.

The older single young people of every family can understand this aspect! How to arrange the plan after that depends on Li Wei, and she knows how to deal with it better.

The affairs of these relatives and friends have been dealt with, Yang Ming is going to leave Wenrou Township temporarily, and it is now April, and Maxwell China Company, located in the magic capital, is in full swing.

Since the M-2 car spontaneously combusted in New North, the company has attracted fierce comments from all walks of life, battery safety issues, battery durability problems, a lot of black praise.

Because this technology is too novel and advanced, if the battery safety problem is not solved, they will never get rid of the defect of spontaneous combustion, which will have too much impact on the launch of production cars.

Therefore, Yang Ming needs to be present to supervise the project in person.

But this time, he felt that he was worthy of the high salary he sent out!

On the issue of battery safety, which he is most concerned about, the company has already achieved results!

In fact, as early as last year, after the electric racing car was tested on the road, Yang Ming emphasized this key issue, and also put the most important battery and car-making projects in China.

Relevant advanced technology and design have also been passed back. In the last year, the team repeatedly tested these fragments on the current stable lithium system battery.

At the end of February this year, the U.S. team of battery research came to China to expand the research and development projects of Chinese companies.

In March, when the boss was harvesting the most important love in his life, the team was in full swing and comprehensively analyzed and controlled the battery black technology brought by the previous boss!

When the boss came back in April, they had already come up with results for what they should be worried about! There was more than one breakthrough! All waiting to be tested!

Now the boss came to the scene to inspect, and the results were successfully displayed.

There are two major projects: the battery safety protection system and the improvement of the hybrid lithium battery system.

Let's start with the first security system.

The battery of an electric car is a single piece, installed in a set of special protective materials, such as a whole battery panel of Tesla, such as the magazine battery of the electric rookie "NIO".

As a racing car or electric sports car that pursues high power and high output, the part of battery safety must not be neglected, otherwise it will be like burning a valuable prototype car in New North time.

Therefore, the person in charge of the company solemnly introduced: "We have formulated a set of strict standards for the test link: we must pass six limit levels, and only after passing all of them can we be established as reliable." ”

"Which six?" Yang Ming asked.

"Please let me give you a detailed description of the process. "The person in charge prepared the video and projected it on the screen, which was a video recording the battery test.

The first level is fire - the battery pack is thrown into a fire pile of more than 1,000 degrees Celsius, and the fire lasts for more than two minutes, and the outer protection system is required to ensure that it does not catch fire and does not explode!

The second level is the impact - a head-on impact at a speed of more than 120 kilometers per hour, or a 20-meter free fall! It also simulates the possibility of a 1 in 10,000 naked collision when the battery is replaced, and all functions must be guaranteed to be normal!

The third level of flooding is divided into two types: freshwater environment and seawater environment! The entire large battery pack is thrown into the water to soak, and the waterproof ability and corrosion resistance are required to be airtight within 30 minutes.

The fourth level is ice and fire - that is, the most common heat and cold resistance test in the industry, hot to 65 degrees Celsius, cold to minus 35 in the ice and snow, constantly alternating hot and cold in the laboratory!

The fifth level is to carry out vibration testing, and the company has won policy convenience and has been allowed to send it to the National Aerospace Science and Technology Corporation to conduct high-frequency vibration tests in the rocket laboratory!

The last hurdle is life and capacity, durability is even more crucial for electric sports cars! The power density should be high, charging and discharging thousands of times, and the capacity attenuation of 10 years or 200,000 kilometers should be less than 20%!

Six levels constitute a hellish test of the company's new battery safety system.

The person in charge said: "The industry standard is almost implemented in this set, but the requirements are much lower! ”

Yang Ming nodded with satisfaction: "So what about the performance of our products?"

The person in charge replied confidently: "With the efforts of our team, all the battery safety systems that have passed the six postgraduate examinations have been put on the test car, look here!"

In front of it is a modular battery, which is made of fire-resistant and impact-resistant materials, with a rectangular design and a magazine-like installation similar to that of NIO, which is placed under the doors on both sides.

"We've also incorporated the racing's active cooling solution, which even exceeds the battery limit, but still has a set of insurances that keep it safe when it's near a tipping point!"

"Good! good!"

Yang Ming watched the completion record and was quite satisfied. Isn't it asking you to work at a high price?

The issue of battery safety has been solved, which is definitely the most rigorous test program in the world at present, and the company is ready to use it in new cars, which will be a strong response to the outside world's doubts.

……

And then there's the second breakthrough – the hybrid lithium-ion system of the battery!

What is the most important thing about the electric vehicle battery?

Since the development of the lithium battery system, it has touched the limit, and it is difficult to improve the capacity.

If you want to change unless there is a new system, but it's still too difficult!

The laboratory has made improvements in the lithium battery system, from pure lithium to a hybrid material, the power density can be increased by 35%, and the capacity can be increased by 30-40%.

Battery power density is important for the horsepower and speed of electric vehicles, and lithium systems cannot take into account both power density and energy density, but hybrid systems can have both.

"Is there any flaw?" Yang Ming wondered.

"The manufacturing cost is relatively high, 400% higher than ordinary batteries. The person in charge said.

For the household electric vehicle industry, this is completely chicken! The cost has been increased by four times, and the capacity has only increased by 40%? It is better to spend a little more money and buy more ordinary batteries to achieve the same capacity!

"It's not a flaw, it's acceptable. Yang Ming doesn't think so, because this battery is not for family cars, but for sports cars that pursue the ultimate!

They are very expensive in their own right, and their positioning has always been at the level of Pagani, Koenigsegg or Bugatti, so doubling the cost of the battery is not important.

Top-of-the-line sports cars are looking for small size, high power, and more range! As for the consequent increase in cost, it is nothing in the face of the million-dollar car price.

The person in charge said: "In addition to the defects of high cost, it is the most suitable technology for the commercialization of high-end vehicle power batteries among our fifteen test items." ”

"Give me the full test report. Yang Ming has to check it, he has absorbed a lot of knowledge in this area, and he knows it in his heart after reading it.

It is indeed possible, the high cost is not the key, it is safe and reliable, and the capacity is high - for the top sports car, it is the highlight of the technology!

"The six major items have also passed?" Yang Ming asked again.

"Of course it passed. ”

"Focus on developing them!"

Yang Ming's worries about the problems have been solved, it has solved the most difficult battery safety, and it has also unexpectedly increased the capacity by 40%, if it can enter the industrial production process, it can be mass-produced.

It's time to show your skills and respond to the outside world's doubts!