Chapter 364: Solid-State Batteries Perform Well, Qin Long Officially Decides to Help

"Is this the new R&D building of Longxing Technology? It is indeed extraordinary!"

"It's really impressive!"

When Qin Long and Qu Cheng followed Chen Xing to the R&D building area, they couldn't help but sigh inwardly when they looked at the three 19-story buildings connected to form a U-shape.

The three of them walked up the stairs and came to the side of the garden fountain. Qu Cheng sighed again: "This design is good. It not only prevents the square from being empty and adds beauty, but also plays a diversion role."

"And purifying the air."

Qin Long added.

Many qualified large company headquarters bases are basically surrounded by green plants. In addition to purifying the air, they provide a close environment similar to nature, improve the mood of employees, and improve work efficiency.

If it were all construction factories with few green plants, the entire base would look particularly like a steel prison cell.

Like Apple's ring-shaped headquarters base, the outer ring is the office area, and the area surrounded by the ring is a "nature reserve" with many animals kept inside.

Behind every seemingly useless design, there is the designer's hard work.

"Kaka——"

Qu Cheng silently took out his mobile phone and took two photos.

After he finished shooting, Chen Xing greeted: "Please come over here. The three R&D buildings have corresponding entrances, but starting from the second floor, the stairs are connected to each other."

"good."

Qin Long praised again.

Qu Cheng took the lead and followed Chen Xing into the R&D building.

Thanks to Chen Xing's guidance, the security check process was extremely simple. There was no requirement to check pockets or keep mobile phones.

"This way, you two, please."

Chen Xing continued to lead the way.

The three of them took the elevator to the floor of the Battery Energy Laboratory.

"Ding--"

The elevator door opens.

Chief Lingchuan has been waiting for a long time.

"President, two seniors." Lingchuan greeted.

Chen Xing also knew that Lingchuan was not good at words, so he nodded slightly and said, "Well, show us the research and development results of the battery pack."

"this way please."

Lingchuan led the way.

The three of them followed his footsteps and walked around for about a hundred meters, arriving at the door of the "Energy Battery Testing Laboratory".

Lingchuan put his work ID card close to the identification area, and the closed tempered glass door opened.

"Please come with me."

Lingchuan continued to lead the way.

The energy battery testing laboratory is rectangular in shape and has three areas in total. The first one to enter is the simulation testing area.

It is filled with testing equipment and instruments. There are ten main workstations, which can be used for ten lithium battery packs to perform cyclic discharge, high and low temperature, water wading and other tests.

Different from violent testing, this is the final inspection step before leaving the factory, focusing on vehicle simulation driving testing.

Passing through the simulation test area is the area where the battery pack is assembled.

The main responsibility here is to connect the battery modules in series to form a battery pack, and then transport it to the violent testing area at the end.

What is brute force testing?

puncture.

collision.

extrusion.

There is no way that you can't think of, and there is no way that we dare not create here.

Lingchuan walked into the violent testing area, looked at Chen Xing, Qin Long, and Qu Cheng and said: "This is our comprehensive testing area, which mainly simulates various extreme situations. It happens that both semi-solid and solid state battery packs have been Once the sample is assembled, it can be tested and inspected by three people, and any deficiencies can be pointed out.”

"let's start."

Chen Xing nodded slightly.

After receiving the order, Lingchuan did not hesitate and called two assistants to place the semi-solid lithium battery pack and the solid-state battery pack in two environmental simulation laboratories respectively.

The environmental simulation laboratory is completely enclosed, and the conditions inside can only be known through the observation window and testing equipment.

"despair--"

As the simulation laboratory was locked, Lingchuan explained to Chen Xing and the others: "Now we have to drop the temperature to zero degrees to simulate the battery life in extremely cold weather in winter."

Turning on the device switch, he continued to explain: "The low-temperature environment of lithium batteries will cause the chemical reaction rate inside the battery to slow down, and the resistance of the electrolyte solution to increase, making the lithium ion crossing performance worse, the activity lowered, and the discharge current changed. Small."

"If I want to be more detailed, it is that the viscosity of the electrolyte will increase in low temperature environments and may even partially solidify, resulting in a decrease in the conductivity of the lithium-ion battery. At the same time, the compatibility between the electrolyte, the negative electrode, and the separator will Sex will also get worse.”

"In addition, lithium will precipitate from the negative electrode of lithium-ion batteries in low-temperature environments, and the precipitated metallic lithium will react with the electrolyte. The product deposition will increase the thickness of the solid electrolyte interface and affect the discharge performance of the battery."

Facing the professional explanation, Qin Long and Qu Cheng kept nodding.

Although they didn't understand the principle, they knew that the battery life of electric vehicles was low in winter, and they didn't think there was anything wrong with what Lingchuan said.

"In addition to checking whether the discharge is normal, the low-temperature test can also visually see the reduction in battery life under extreme weather."

Lingchuan continued.

"Hmm." Chen Xing nodded slightly and asked for Qin Long and Qu Cheng: "Then, are there any differences between our semi-solid and solid lithium batteries with the same power and the same low temperature environment?"

"I just said that extreme cold weather will cause the electrolyte to solidify." Lingchuan glanced at Chen Xing and continued: "There is electrolyte in semi-solid lithium batteries. In other words, in too cold weather, it will Battery life will still be reduced.”

"but!"

Suddenly, he changed the subject: "The impact of extreme cold weather on all-solid-state batteries is minimal, or even negligible."

"so smart."

Qin Long couldn't help but his eyes lit up.

He finally understood why Chen Xing mainly promoted electric vehicles. The development speed of lithium battery technology exceeded everyone's imagination.

"After all, it is an energy innovation product, which is also the advantage of solid-state lithium batteries."

Lingchuan responded.

Listening to Lingchuan's explanation, the two assistants' jaws dropped.

It's not because of the lithium battery technology, but because what Lingchuan said in just a few minutes was ten times or even dozens of times what he usually said in a month.

Normally when they communicated with Lingchuan, they would get at most "um", "oh", "ok", these few words of reply, but today's long explanation made the assistant feel like he didn't recognize Lingchuan anymore.

While Lingchuan was talking about his own lithium battery products, the temperature in the closed laboratory had dropped to zero degrees.

"It's zero degrees."

The assistant reminded.

Lingchuan looked at the device screen and explained to Chen Xing and the others again: "This is the discharge state at normal temperature that was just recorded, and this is the discharge state at low temperature. It can be clearly seen that the resistance value increases at low temperature. Now, the power consumption speed has increased by 11%, and Xiaolin has continued to lower the temperature.”

"clear."

The assistant controls the device.

The temperature inside the simulation test laboratory continues to decrease. It can be seen intuitively that every time the temperature drops by one degree, the power consumption rate will increase. When the temperature is minus ten degrees, the power consumption rate reaches the 25% range.

What is this concept?

If you can run 1,000 kilometers in summer, you can only run 750 kilometers in this extreme environment. If it is dozens of degrees below zero, the battery life will continue to decrease.

The performance of semi-solid-state batteries is already very strong. If you replace it with a traditional lithium battery and drive in subzero weather, the mileage will be basically cut in half.

However, what surprised Chen Xing, Qin Long and Qu Cheng was that the solid-state lithium battery equipment showed that its power consumption rate only increased by 1%, which was a bit too abnormal.

A 1% increase in power consumption speed has minimal impact!

"As you can see intuitively, this is the advantage of sulfide solid-state lithium batteries compared to semi-solid lithium batteries."

As soon as Lingchuan finished speaking, Qin Long couldn't help but ask: "Sulfide?"

Qu Cheng frowned secretly. If they remembered correctly, sulfides are very afraid of humid environments. Can this be made into a lithium battery?

"Yes." Lingchuan nodded and patiently explained: "It is a sulfide solid-state battery. From 1980 to 1990, after the glassy sulfide solid-state electrolyte represented by Li2S·P2S5 was developed, the first crystalline The state-of-the-art sulfide solid electrolyte Li3.25Ge0.25P0.7S4 was also developed in 2001. In the following ten years, glass ceramics and high conductivity sulfide electrolytes were successively developed, but none of them solved the humidity problem. ”

"When sulfide meets water, the internal stable structure will be destroyed. This is a point we need to overcome, and it is also a point we have already overcome."

"Conquered?"

Qin Long was refreshed.

Is it possible that Chen Xing really wasn't bragging and that everything he said in the press conference was true?

"As you can see, entering the test means that it has been conquered."

Lingchuan responded.

"What method was used to conquer it?" Qin Long quickly asked the reason.

This time Lingchuan did not answer, but looked at Chen Xing. How to overcome the humidity and ensure the internal stability of the sulfide solid-state battery is a commercial secret and cannot be disclosed casually.

Sensing the eyes looking at him, Chen Xing nodded slightly in acquiescence.

Qin Long and Qu Cheng, as representatives of the Academy of Dragon Science, can be trusted. Even if they say they know the principle, they will not tell it everywhere. This is the ethics of scientific researchers.

In addition, Chen Xing's original intention to take them on a tour this time was to show off his sword and strive to get the license plate for new energy vehicles in the autumn.

Just imagine, if there is a car owner who has not won the lottery number for several years, and suddenly someone says that buying a new energy vehicle does not require a lottery number, he can get the license directly, and can go to the city without restrictions, can this be regarded as a trump card to increase sales?

The answer is yes.

Waiting is often too painful.

Even if they no longer want to drive an electric car, some car owners will definitely choose to compromise when faced with the temptation of urban license plates.

Seeing Chen Xing nodding, Lingchuan did not hide the reason.

"Sulfide solid electrolytes have three classification forms, glassy, ​​crystalline and glass-ceramic."

"The glass ceramic state used in our solid-state battery is obtained by further polishing and low-temperature sintering. It is a metastable phase mixed with glassy and crystalline states. There are a small number of peaks under XRD characterization. Although the conductivity decreases, the internal The material is stable. In order to stabilize the internal chemicals to the greatest extent, we only retain four tiny crystals: orthothiophosphate, pyrophosphate, metathiophosphate and hypothiophosphate, which perfectly solves the moisture problem. "

"Orthothiophosphate, pyrophosphate, metathiophosphate, hypothiophosphate..."

Qin Long murmured to himself.

This is an area he has never touched.

However, as the president of the Long Academy of Sciences and an academician in the field of nanostructure and high-resolution characterization and control of single molecules, he still has his own knowledge base on materials.

"Polished at low temperature, supported by crystals, that's it. It turns out that this is a solid-state battery." Qin Long seemed to have discovered a new world.

If it is the same as what Lingchuan said, then electric cars are really feasible.

In the past, electric vehicles could not develop because domestic lithium battery technology was not advanced enough, not because this field was not good.

Now Longxing Technology's lithium battery has not only achieved semi-solid state, but also made a breakthrough in full solid state. The conditions for promoting electric vehicles are ripe and it is the future development trend.

"How is the conductivity?"

Qu Cheng asked.

He was already in a state of shock and his expression was moved.

I thought Chen Xing was trying to scare the Americans, but I didn't expect that his family really had solid-state batteries. It would not be long before Longguo currency replaced the US dollar. Longguo currency hook technology is really promising.

"Wait a minute."

Ling Chuan went to the office desk on one side, picked up a document on the table and walked back, handing it to Qu Cheng, saying: "This is the test data and internal composition of a single battery."

As we all know, a battery pack is composed of battery modules, and a single battery is the basic unit that makes up a battery module.

Qu Cheng took the document and opened it, and Qin Long also leaned in to watch the content.

Name: Glass-ceramic solid-state lithium battery.

Chemical composition: orthothiophosphate, pyrophosphate, metathiophosphate, hypothiophosphate.

Ionic conductivity: 2.7×10-3a

"2.7×10-3a?"

Qu Cheng and Qin Long were stunned again.

If they remembered correctly, this value was comparable to the ionic conductivity of organic electrolytes, or even far exceeded it.

Now, judging from the data on paper, sulfide solid-state batteries are simply revolutionary products that completely beat traditional lithium batteries.

"How about the sulfide solid-state batteries we developed?" Chen Xing asked, looking at Qin Long and Qu Cheng, who were stunned.

"Very powerful."

"Very strong."

The two praised generously.

While they were reading the documents, Ling Chuan had already changed the temperature of the simulation laboratory to high temperature mode, and the temperature began to change.

Fifteen minutes later, the temperature had risen to 37 degrees.

However, it was far from enough. After another fifteen minutes, the temperature in the test laboratory had soared to 70 degrees, which was already the operating limit of ordinary lithium batteries.

But it was far from enough!

80 degrees.

90 degrees.

100 degrees.

Qin Long looked at the soaring temperature and said quickly: "This...this won't explode, it's 100 degrees Celsius!"

100 degrees high temperature, this can be used to fry eggs.

"Don't worry, you two, after several improvements by our battery energy team, the maximum safe temperature of polymer semi-solid batteries is 115 degrees, and sulfide solid-state batteries can operate normally at 300 degrees high temperature."

Chen Xing answered.

On the eve of the underworld press conference, he specifically learned about his latest achievements and asked Lingchuan to give him a report on the results. These have already been memorized.

"300 degrees?"

Qin Long's breathing became rapid.

Solid-state batteries can actually withstand 300 degrees high temperature. This is no longer a simple civilian technology. It can be used in the military!

Qu Cheng was also surprised. They all underestimated Longxing Technology's research and development capabilities.

It is no exaggeration to say that once polymer semi-solid and sulfide all-solid lithium batteries are used, it will be a fatal blow to fuel vehicles.

Extreme cold and high temperature are guaranteed. Isn't this better than fuel vehicles?

Users who are not optimistic about the development of electric vehicles now say that lithium batteries are prone to spontaneous combustion and have no safety guarantee.

Because everyone knows that lithium batteries are fragile, and a slight squeeze and deformation may cause electrolyte leakage, leading to spontaneous combustion and fire.

Cars are different from mobile phones. People have car accidents every day, and there are not a few serious car accidents. If they also spontaneously combust, how can we guarantee the survival rate of car accidents?

But now!

The problem seems to be solved!

Extreme cold and high temperature can't do anything to them. Is there any pressure for puncture and compression?

Qin Long and Qu Cheng have forgotten the time. They stared at the test, and their breathing became rapid with the test items.

Drop test items.

Drop the battery pack freely from a height of 1 meter,

Check whether the battery pack shell is intact and whether the battery function is normal.

"Boom--"

The two battery packs fell heavily to the ground.

The protective steel body is still strong, and the edge is slightly concave. This project tests the internal, so after the fall, Lingchuan immediately arranged for an assistant to test the charging and discharging functions.

A moment later.

"Charging is normal."

"Discharging is normal."

"Passed."

"Next item, vibration test."

Using high-frequency vibration as the test point, ensure that the battery pack can cope with possible bumps and collisions during driving.

After the extreme bumps, the battery function is still tested to see if it is normal.

Following this is the puncture project, which uses a steel needle to directly destroy the inside of the battery. If it is an ordinary lithium battery, it will 100% smoke and catch fire.

But after the test, neither the semi-solid nor the all-solid battery caught fire. The polymer semi-solid battery only emitted a little black smoke, without spontaneous combustion, and the sulfide all-solid battery had no reaction at all.

"The puncture project passed."

"Next item, extrusion test."

The assistant put the battery pack that had just been punctured into the extrusion equipment, and the steel plates on both sides began to shrink and squeeze.

After a while.

The external steel body of the battery has been deformed.

After squeezing another 1CM, the polymer semi-solid battery has emitted thick black smoke, but still has not spontaneously combusted, and the sulfide solid-state battery has not changed at all.

"The polymer semi-solid lithium battery has passed the safety performance test, but the internal extrusion is severely deformed, and the module can no longer charge and discharge normally."

The assistant reported the situation again.

This result is already excellent.

Aren't you afraid that the lithium battery will spontaneously combust?

Puncture, extrusion, high altitude fall, high temperature, and low temperature are all fine. What are the disadvantages of electric vehicles?

Qin Long and Qu Cheng's eyes changed from shock to horror, and then from horror to disbelief. This is simply a revolutionary product.

Just when they were about to speak, Ling Chuan nodded slightly and said in a deep voice: "Test whether the solid-state battery functions normally."

"Understood."

"Okay."

The two assistants immediately went to prepare.

Qin Long looked at the battery pack with a dent in the protective steel body, and suddenly became uneasy. He asked: "Can it still be used like this?"

"Yes." Ling Chuan nodded and continued: "The battery pack is composed of battery modules. The damage of a single module group will not affect the internal function, but the premise is that the battery pack cannot be damaged too seriously."

Qin Long and Qu Cheng looked at each other, a little at a loss.

Today, they really saw what rapid technological development and the possibility of overtaking on the curve mean.

In the shocked eyes of the two, the assistant reported the test results: "Two module groups were damaged, and the other modules were all normal."

"Good!"

Ling Chuan smiled with satisfaction.

This was the answer he gave to Chen Xing, a nearly perfect lithium battery.

Hearing that the sulfide solid-state battery was so strong, Chen Xing asked the most concerned question: "How many kilowatts of fast charging does it support?"

"Theoretically, there is no upper limit."

Ling Chuan said bluntly.

"Hiss--"

Qin Long and Qu Cheng took a breath.

Theoretically, there is no upper limit. Doesn't that mean that as long as the voltage is strong enough and the current is large enough, it can be fully charged in one second?

"What about now?"

Chen Xing is more concerned about the present.

Because it is less than three months away from the agreed autumn press conference, he is more concerned about the selling points of the new car when it is released.

"There is no time to test it yet. This requires joint testing with the fast charging laboratory and the heat dissipation laboratory. It should take some time to prepare."

Ling Chuan responded again.

"I understand." Chen Xing nodded.

The upper limit of charging power depends not only on the battery, but also on the optimization of the heat dissipation system and the fast charging path.

Although sulfide solid-state batteries can withstand ultra-high temperatures, their circuits are not made of room-temperature superconducting materials after all. As long as there is resistance, electrical energy will be converted into heat energy, breaking through the bearing limit, and the spontaneous combustion will still burn.

"President Qin, Mr. Qu, this is the whole process of testing the polymer semi-solid and sulfide all-solid lithium batteries developed by our Longxing Technology. What do you think?"

"Awesome!"

Qu Cheng gave a thumbs up.

Saying "amazing" can no longer express his inner shock. Only the quintessence of the country can perfectly interpret his shock.

Qin Long shook his head and said with emotion: "I thought I was already well-informed, but I didn't expect that I was still a frog in the well. Polymer semi-solid and sulfide all-solid lithium batteries really taught me a lesson. This can indeed be regarded as new energy. Leave the license to me."

In public and private, he has to help with the new energy license.

The reason is very simple. He saw the possibility of Longguo overtaking in the automotive field and leading by a long way.

Due to the slow start of the industry, Longguo enterprises in the field of fuel vehicles have paid too much technology patent fees to German and Japanese enterprises.

If the deadlock can be broken with new energy vehicles, history books will definitely record this matter, and perhaps the names of Qin Long and Qu Cheng will also be introduced on this page.

"By the way." Qin Long remembered something and asked again: "I saw you talk about charging piles in your live broadcast before. Have you solved this problem?"

"I'm thinking of a way."

Chen Xing did not hide it.

Longguo is so big, and the investment in charging piles is huge, so what he thought was to start from the first, second and third tier cities, and then slowly lay out the fourth, fifth, sixth, seventh and eighth tier cities after making money, until covering the whole country.

"You haven't thought about it yet, right? Why don't you do this? You can do a pilot project in Beijing, Shanghai, Guangzhou and Shenzhen first. During this time, I will go to talk to someone. If it goes well, this may be included in the basic building facilities of the State Grid." Qin Long expressed his idea.

"Really?"

Chen Xing was delighted.

If Qin Long can really get it done, then everything is ready, just waiting for listing.

Qin Long smiled calmly and said jokingly: "I am old, I will definitely not make fun of you, and today I have also opened my eyes, electric vehicles can indeed develop."

After a pause, he changed the subject: "My words do not count, the relevant units need to nod, you should understand what I mean."

"I understand."

Chen Xing nodded slightly.

Whether it is the new energy license plate or the construction of charging piles, these are not what Qin Long can decide, he does not have this right.

But the top circle is very small, Qin Long basically knows those who have the power to make the final decision, and has their contact information.