v2 Chapter 71： New car research and development II

In order to meet the needs of modern field warfare, the US side requires vehicles to be equipped with micro-generators. And has a strong power storage capacity, in the absence of any power. It can satisfy a light bulb for 72 hours of lighting; that is, it must reserve more than 36 degrees of electricity.

This is definitely a challenge, and once it is successfully developed to perform tasks in the wild, the safety will be greatly improved. The technology of small generators is relatively simple. After all, human beings have been using electricity for more than a hundred years, so it can be said to be handy.

The difficulty lies in the storage of electrical energy, and traditional liquid batteries meet the requirements. But the weight and volume are really appalling, and it's ok if you travel by car.

Now American soldiers are driving out to fight, with liquid batteries installed, no different from live targets. GM and Ford know it's hard to do with existing technology. Putting forward these requirements is more to make manufacturers including Heiyun Automobile retreat, and then they can take the opportunity to ask the US Department of Defense to reduce technical requirements, but Bao Zixuan does not think so.

The traditional liquid battery is not good, so the Heiyun Group, which is the only one in the world in lithium battery technology, can completely take over this task. It can even be said that it is tailor-made for Heiyun cars. After all, in terms of lithium batteries, even Japanese manufacturers are technically inferior to Heiyun Group.

The US side, including GM and Ford, of course, is destined to shoot itself in the foot.

Bao Zixuan had already made preparations, and had already seconded the Heiyun mobile phone lithium battery department to the auto factory, requiring them to work here for a period of time.

The algorithm application of the black cloud mobile phone to the lithium battery is more reasonable, even stronger than that of the notebook computer department. All the credit of Yule Engel; this great figure of Bell Labs is showing his brilliance at the Black Cloud Group.

In order to reflect the importance attached to this military vehicle order, Oblak, the actual head of the mobile phone department, personally led the team. Its purpose is self-evident, to demonstrate its importance.

Bao Zixuan: "Dr. Oblak, these people are all good at developing cars. But when it comes to batteries, especially the field of lithium batteries, it can be said to be smeared. You are an expert in this field. Let me introduce you to everyone."

Oblak is very clear about the painstaking efforts of the teacher to arrange him to come, and it stands to reason that ordinary engineers can do it. But why did the teacher send him here, of course, to communicate with Bao Zixuan and let the boss know more about him.

The Heiyun mobile phone department is going to be handed over to him, but he is too young, and this is not the most important thing. There is too little time to communicate and meet with Bao Zixuan, and even if he has talents, he is not completely discovered. Just taking advantage of this opportunity, it shows that Yule Engel also has good intentions.

Engineers, especially top engineers. It's just that they are not good at specializing in research. If they are careful about the world, it is estimated that no one in the world can match them.

Another point is that real gold is not afraid of fire, and Yule Engel has absolute confidence in his proud students. Working with Bao Zixuan is bound to give the boss a comprehensive insight into Oblak's technical, organizational, and coordination abilities.

Oblak stood up and said: "You are all seniors, and you are absolutely authoritative in the field of car manufacturing. However, this time the US government has requirements for power supply equipment, just as our mobile phone company has conducted in-depth research on lithium batteries. To meet the technical requirements, if there is anything wrong, please correct me."

This is more of a polite remark, and no one will take the initiative to challenge the authority of others. Heiyun Mobile is definitely the most profitable company in the group, and it can even be said that it is not one of them. Not only the market share is the highest, but the price is also the most expensive.

In this era, mobile phones are considered luxury goods, and customers do not pay special attention to price. Paying more attention to product performance and services provided, Heiyun has made great efforts in this regard. It is more to ask fashion designers to design the shape, which is definitely beyond the existence of the times.

Oblak: "According to the technical requirements put forward by the United States, traditional liquid batteries cannot meet the technical requirements at all. Because that requires at least an additional ton of weight, the combat performance will be greatly reduced."

"The group has carried out in-depth research and development on lithium batteries three years ago, and has achieved revolutionary breakthroughs."

"Based on the ternary lithium battery used in mobile phones, a lithium iron phosphate battery was developed."

"Lithium iron phosphate battery is a lithium ion battery using lithium iron phosphate as the positive electrode material and carbon as the negative electrode material. The rated voltage of the single cell is 3.2V, and the charge cut-off voltage is 3. During the charging process, part of the lithium in the lithium iron phosphate The ions are extracted, transferred to the negative electrode through the electrolyte, and embedded in the carbon material of the negative electrode; at the same time, electrons are released from the positive electrode and reach the negative electrode from the external circuit to maintain the balance of the chemical reaction. During the discharge process, lithium ions are removed from the negative electrode, reach the positive electrode through the electrolyte, and at the same time the negative electrode The electrons are released from the external circuit to the positive electrode to provide energy to the outside world."

"Lithium iron phosphate batteries have the advantages of high operating voltage, high energy density, long cycle life, good safety performance, low self-discharge rate, and no memory effect."

"If a traditional liquid battery is used, one ton of weight is required to meet the technical requirements of the United States. If a lithium iron phosphate battery is used, the weight will not exceed 50 kilograms."

Hearing this, everyone showed incredible expressions. What a feeling, it directly pushes battery technology forward 20 years or more.

David Bruce, the head of the assembly and an alumnus of Bao Zixuan's Massachusetts Institute of Technology, asked: "Dr. Oblak, such a small volume has such a large energy density. How can we ensure safety, if we are hit by bullets? Or the direct firing of artillery shells, will it bring catastrophic consequences. At that time, the parachute incident during World War II, I am afraid it will be the turn of the black cloud.”

This concern is normal, after all they provide military products. Moreover, it provides products for the United States, and the safety performance cannot be guaranteed, which will inevitably lead to endless troubles.

Such a large capacity density if the battery were to explode. The same mortar shell exploded almost, and the US military sitting on it was very dangerous. Because of the problems with the product itself, the entire enterprise, including the senior management of the group, will be severely sanctioned.

Moreover, the parachute story is real, and the US military's requirements for military equipment can be said to have reached the point of nitpicking.

This is a true story between the U.S. Air Force and a parachute manufacturer in the middle of World War II. At that time, the safety of parachutes was not perfect, and the pass rate was only about 60%. Through the efforts of manufacturers to improve, the yield rate of parachutes produced by parachute manufacturers has reached 99.9%. It should be said that this yield rate is difficult for many companies to achieve even now.

However, the U.S. Air Force said No to this company, and they required that the parachutes delivered must have a 100% yield rate. So the general manager of the parachute manufacturer went to the flight team to discuss the matter, to see if this level could be lowered? Because the manufacturer believes that it is close to perfect to achieve this level, and there is no need to change it. Of course, the US Air Force refused, because there is no discount on quality. Later, the military demanded that the method of checking quality be changed. That is to randomly select one of the parachutes delivered by the manufacturer the week before, and let the person in charge of the manufacturer equip the back of the body and jump from the in-flight fuselage in person. Immediately after this method is implemented, the defect rate becomes zero.

David Bruce previously worked at Jeep ~ www.novelhall.com ~ developed and improved weapons for the US military during the Vietnam War. It can be said that the US government has a better understanding of the product performance, and safety is definitely the first. It is normal to raise doubts, it is not directed at anyone, it is just a normal work discussion.

Oblak: "As for safety, you can rest assured; the electrochemical performance of the lithium iron phosphate battery cathode material is relatively stable, which determines that it has a stable charging and discharging platform, so the structure of the battery will not change during the charging and discharging process. , it will not burn and explode, and it is still very safe even under special conditions such as short circuit, overcharge, extrusion, and acupuncture."

"Not only that, we will also wrap a layer of metal alloy on the outside of the battery casing, unless it is directly attacked by artillery with a caliber of 100mm or more, there will be no safety problem. Even anti-tank mines will not cause it fatal. harm."

"Although it will increase a certain amount of weight, the overall weight will definitely be controlled within 80 kilograms. With various auxiliary equipment, the overall weight of the power system will not exceed 100 kilograms, which can definitely meet the requirements; it will not support the entire project."

Oblak has a double doctorate in physics and chemistry, and is a famous teacher. The most demanding of technology, his guarantee is very important. Not to mention that it represents authority, at least it is still convincing. If there are other doubts, it can only be verified by actual tests.