Get up early in the morning and open the curtains.
The air in the mountains is fresh and full of forest fragrance and mountain spring water.
After breakfast, I picked up the fishing rod made of wooden sticks, took Zhang Qingcui and Yu Mo to the stream at the foot of the mountain, and threw out the fishhook while listening to the gurgling water.
Li Donglai instantly transformed into a fisherman and spent the morning leisurely.
In the afternoon, I exchanged some research experiences with the researchers.
Li Donglai had a happy life at the Southeast Institute of Chemical Materials.
He finally understood that the ministry would locate the research institute in such a remote location.
Here, far away from the hustle and bustle of the city and the intrusion of the world, researchers can concentrate on their research work.
If Yu Mo hadn't opened the door and told him that Professor Liu Mingde had come out of the laboratory, Li Donglai would have even forgotten the purpose of his trip.
Professor Liu Mingde's appearance was exactly as Li Donglai had imagined, with piercing eyes, a wine bottle on the bridge of his nose, a broken tortoiseshell frame wrapped with white medical tape, an unkempt beard under his lips, and a gray tunic suit covered with stains.
.
"Sorry, Director Li, I kept you waiting for so long."
Professor Liu Mingde said apologetic words, but there was no trace of apology in his eyes. Instead, he was full of excitement. It was obvious that he had just completed an important research work.
Li Donglai stretched out his hand and shook his big hand tightly: "You're welcome, Professor Liu, I'm afraid you have received a notice from the ministry. We are here to ask for relevant research results on lead-acid batteries."
While in Beijing, Li Donglai also thought about inviting Professor Liu Mingde to the steel rolling mill laboratory to lead the research on lead-acid batteries.
But after arriving at the laboratory and seeing how obsessed Liu Mingde was with the research work at hand, Li Donglai felt that he had taken it for granted.
"Ah! Lead-acid batteries, wait a minute."
Liu Mingde opened the bookcase and rummaged through the messy materials.
While he was looking for it, he said sheepishly: "Sorry, I forgot where I put it. You may also know that I just researched it out of personal hobbies and didn't pay much attention to it."
Li Donglai: "......"
Although he felt that Liu Mingde was a bit Versailles, he could understand it.
In scientific research, many casual research results often shine in the society of later generations.
For example, when the German physicist Röntgen was studying cathode rays, he discovered a mysterious ray that could penetrate black paper and wooden boards. This ray was called X-ray in later generations and became an important means of medical observation.
When British biologist Fleming was cultivating bacteria, he discovered a mold that could kill bacteria. This mold was the famous penicillin, which saved countless lives.
.....
Li Donglai is also full of confidence in Professor Liu Mingde's research results on lead-acid batteries.
"found it!"
After rummaging for a while, Professor Liu Mingde finally dug out a thick pile from a pile of junk-looking materials.
He dusted it off and handed it over.
"Director Li, considering that the lead-acid batteries currently in use are all open-type, with flowing sulfuric acid electrolyte inside, it is easy to overflow during transportation, and gas and acid mist will be released during charging. For the environment, use
Both the person and the equipment have certain risks.
So I designed a gel electrolyte to immobilize the electrolyte."
As soon as these words came out, even though Li Donglai had been mentally prepared, he was a little moved.
Lead-acid batteries are an ancient battery technology that appeared in 1859. The purpose of their invention is to allow people to store electricity just like wood and grain for emergency needs.
but.
Just because lead-acid batteries cannot be used closed and are very dangerous, they have not been promoted.
Although the gel electrolyte used by Professor Liu Mingde can fix the electrolyte and does not achieve the sealing of the battery, it can be regarded as a big step forward.
More importantly, as a time traveler, Li Donglai happens to know the key technology that closed batteries lack.
Treasures, this is a lot of treasures, just thrown into the bookcase so casually.
It is conceivable that due to the limitations of the times, Professor Liu Mingde did not realize the importance of this invention and just regarded it as a casually designed gadget.
In addition, in this era, domestic scientists did not have the hobby of applying for patents. This technology was basically abandoned until it was researched in foreign laboratories. With this technology, various subsequent problems could be overcome and manufactured.
Practical lead-acid batteries, thereby earning rich returns from countries around the world.
Li Donglai suppressed his excitement and studied the information carefully.
Soon, he almost couldn't help shouting.
Liu Mingde not only developed the gel electrolyte, but also conducted in-depth research on the plates, additives, and separator materials of lead-acid batteries.
This is equivalent to completing more than half of the research work on lead-acid batteries.
Li Donglai took a deep breath, suppressed the excitement in his heart, and looked at Liu Mingde: "Professor Liu, according to your calculations, the energy density of lead-acid batteries can reach 10WH/KG. If I give you enough resources, are you confident?
, doubling the energy density.”
Energy density is the main criterion for measuring the quality of a battery. A battery with a higher energy density can release more electrical energy under the same volume.
This question immediately confused Liu Mingde.
The eyes behind his spectacles blinked, and it took a long time for him to react.
His expression suddenly changed: "Professor Li, do you want to put lead-acid batteries into practical use?"
It’s no wonder Liu Mingde was so surprised. Since the emergence of lead-acid batteries, scientists at home and abroad have conducted research on it for a hundred years.
I think that one day, lead-acid batteries can be used to drive electrical appliances.
but.
The energy density of lead-acid batteries has never exceeded 10WH/KG.
This energy density is even far lower than AA dry cells.
Coupled with the dangers of open lead-acid batteries, there is no market prospect at all.
"I just have this idea, Professor Liu Mingde. To be honest, our steel rolling mill laboratory has launched a new electric vehicle project."
Li Donglai did not hide anything and explained the principles and structure of electric vehicles.
Professor Liu Mingde was amazed when he heard this, and his attitude suddenly became respectful.
He stood up, picked up the rusty iron tea bottle, and poured an enamel jar of hot tea for Li Donglai.
Just now, Li Donglai was the director of the laboratory, and Liu Mingde has always been honest about leadership.
But now it's different.
Li Donglai is a true scientist, so he should be served with tea and water.
Liu Mingde poured himself a cup, and after taking two sips of tea, he said slowly: "Professor Li, the brushless motor you designed, even though I am not studying electromechanics, I can still see its power.
The electric bicycle project might actually be successful.
but.
Why don't you use lithium batteries?
I saw in a foreign journal that Professor Stanley Whittingham published a paper claiming that the energy density of batteries made from lithium metal would reach an astonishing 50WH/KG.
Based on this energy density calculation, the manufactured battery will be able to fully meet the needs of electric bicycles."
Li Donglai was not surprised at all that Professor Liu Mingde was able to learn about the latest scientific research progress in foreign countries.
Although communication channels with the outside world are scarce in this era, there is still some communication, especially in the field of scientific research.
Take the steel rolling mill laboratory as an example. Every month it receives major foreign journals and magazines forwarded by ministries and commissions.
only....
Li Donglai held the enamel jar and said with a faint smile: "The emergence of lithium batteries will be an invention that transcends the times, but it is not suitable for use on electric bicycles."
"Why?" Liu Mingde was surprised.
Li Donglai said: "Lithium is located in Group IA, the second period of the periodic table of elements. It easily loses electrons during chemical reactions and forms ions. This characteristic determines that it is a high-quality raw material for making batteries.
But it also determines that its chemical properties are extremely unstable. Once the temperature rises sharply or a mechanical collision occurs, it will easily explode and catch fire.
As electric bicycles are vehicles that travel on the road, accidents are inevitable."
In later generations, after decades of development of lithium batteries, manufacturers have installed various protective measures in them, because accidents caused by lithium battery explosions are still frequent.
It is conceivable that in this era, simple lithium batteries are installed on electric bicycles.
The electric bicycle becomes a moving bomb.
Professor Liu Mingde understood this truth after just thinking about it for a moment.
He nodded and said: "Professor Li, you are right. As scientific researchers, in addition to producing research results, we must also consider the usability of scientific research results."
These words made Li Donglai look at Liu Mingde with admiration. In this era, because R&D and sales are basically struggling, many researchers only know how to work hard in the laboratory and do not pay attention to the promotion of scientific research results.
"So, we have only one path now, which is to develop high-density lead-acid batteries."
As Li Donglai spoke, he stared directly at Professor Liu Mingde: "There is no doubt about the safety of lead-acid batteries. Once a lead-acid battery that meets the requirements is developed, and our steel rolling laboratory takes out the brushless motor, we can make electric bicycles
Get it out.
You also know that although several large oil fields have been discovered in the country's northeast and border areas, oil production is increasing day by day.
However, domestic fuel supply remains tight.
In addition to meeting the needs of industrial production, limited fuel also costs a large part of people's travel.
If there are electric bicycles, the frequency of use of fuel vehicles will inevitably be reduced.
In this way, fuel resources are saved for the country.
in addition.
Imagine that the streets and alleys are full of electric vehicles that don’t use fuel, what would it be like?”
Professor Liu Mingde originally didn’t care about lead-acid batteries.
But when I think about the thousands of electric bicycles running across the land of China.
Especially the batteries used in these electric bicycles, and when he had a share of the credit, the hand holding the enamel jar actually started to tremble slightly.
"This, this is simply a miracle!"
"Now that we want to realize this miracle, we need your participation. Are you willing?"
Li Donglai stood up and stretched out his hand towards Professor Liu Mingde with a solemn expression.
Professor Liu Mingde stood up slowly and extended his hand.
An old man and a young man held their hands tightly together.
Professor Liu Mingde nodded: "Professor Li, I am willing to join, but I am currently studying rocket fuel..."
"Don't worry, I will submit an application to the higher authorities..."
Considering the urgency of the matter, Li Donglai, after greeting Professor Zhang Dezhi, the director of the institute, formally submitted the application to the comrades of the ministry through a confidential line.
Considering the particularity of Southeast Chemical Materials Research Institute and the particularity of Liu Mingde's ongoing projects, the comrades of the ministry and commission have no way to make a decision directly.
"Professor Li, don't worry, we will reflect your appeal as soon as possible. We also hope that you can wait a few more days."
"Then I'll trouble you."
After hanging up the phone, Li Donglai conveyed the opinions of the comrades in the ministry to Professor Liu Mingde.
Professor Liu Mingde marveled at Li Donglai's energy.
You must know that the project he is currently working on is a key project. Generally speaking, let alone transferring people, even if it delays their work, they will be severely criticized.
"Professor Li, don't worry. I will take advantage of these few days to sort out the previous research results and ensure that I will increase the energy density of the lead-acid battery to 20 as soon as possible after returning to the capital."
This chapter is not finished yet, please click on the next page to continue reading the exciting content! "It just so happens that I also have research on lead-acid batteries. We can take this time to have a good exchange." Li Donglai said with a smile.
At Li Donglai's suggestion, the Southeast Institute of Chemical Materials suspended Professor Liu Mingde's research project and allocated an office to him and Li Donglai for their use.
Li Donglai studied lead-acid batteries with Professor Zhang Mingde in the morning, and took Zhang Qingcui for a walk in the mountains in the afternoon. His life was wonderful.
The days passed day by day.
One afternoon, Li Donglai threw his fishing rod in the stream as usual, held a book, sat on the rock and read,
After these days, Yu Mo had become familiar with Li Donglai and said with a smile: "Director Li, you have fished for so many sky fish and you haven't caught any. Is it because there is no bait on the hook?"
Zhang Qingcui stood up, took a deep breath of fresh air, and said: "What do you know, Director Li is Jiang Ziya fishing, whoever wants to take the bait!"
"No fish would be stupid enough to chew on a fishing hook. It doesn't taste good." Yu Mo said seriously.
Zhang Qingcui covered her mouth and smiled: "You are really a nerd. Director Li took the opportunity of fishing to go to the wild to cultivate his sentiments."
"Cultivation of sentiments? There are stones everywhere here, what is there to cultivate?"
"You really don't have any artistic talent."
"I'm engaged in scientific research, so I don't need that stuff."
....
Just as the two were bickering, there was a sudden rush of footsteps in the distance.
Li Donglai's ears were very sensitive. He put his hand into his waist and stood up suddenly.
In the distance, a comrade in uniform ran over.
He seemed to be in a hurry, with thick beads of sweat on his forehead, panting heavily, and ran to Li Donglai in one breath.
"Director Li, it's bad, Professor Liu Mingde fainted."
