Chapter 871

In order to meet the needs of modern field operations, the U.S. military requires vehicles to be equipped with micro generators. And it has strong power storage capacity without any power. It can meet the lighting of one bulb for 72 hours; That is, more than 36 degrees of electric energy must be reserved.

This is definitely a challenge. Once the research and development is successful, the safety will be greatly improved when performing tasks in the field. Small generator technology is relatively simple. After all, human beings have used electricity for more than a century, which can be said to be handy.

The difficulty lies in the storage of electric energy. The traditional liquid battery meets the requirements. But the weight and volume are really miserable. It's ok if you travel by car.

Now American soldiers drive out to fight and install liquid batteries, which is no different from a live target. GM and Ford know that with existing technology, it is difficult to do so. Putting forward these requirements is more to let manufacturers including heiyun automobile retreat from difficulties, and then they can take the opportunity to put forward lower technical requirements to the U.S. Department of defense, but baozixuan doesn't think so.

The traditional liquid battery is not good, so the black cloud group, which is the world leader in lithium battery technology, can take over this task. It can even be customized for black cloud cars. After all, in terms of lithium batteries, even Japanese manufacturers can't compare with black cloud group in technology.

The U.S. military, including general motors and Ford, is destined to lift a stone and hit itself in the foot.

Baozixuan has long been prepared and has seconded the lithium battery Department of heiyun mobile phone to the automobile factory. They need to work here for some time.

The algorithm application of black cloud mobile phone to lithium battery is more reasonable, even stronger than that of notebook computer department. It's all the credit of Jul Engel; The great God of Bell Labs is playing his light in the black cloud group.

In order to reflect the importance attached to the military vehicle order, the actual person in charge of the mobile phone department, obarak, personally led the team. Its purpose is self-evident, which is to prove its importance.

Bao Zixuan: "Dr. o'blake, these people are good at developing cars. It can be related to batteries, especially in the field of lithium batteries. You are an expert in this field. Let me introduce you. "

O'brac is well aware of the teacher's efforts to arrange him to come. It is reasonable that ordinary engineers can complete it. But why did the teacher send him here? Of course, he communicated with baozixuan to let the boss know more about him.

The black cloud mobile phone department wants to give it to him, but he is too young, which is not the most important thing. There is too little time to communicate and meet with baozixuan. Even if you have talent, you are not completely found. Taking advantage of this opportunity, it shows that Jul Engel is also well intentioned.

Engineers, especially top engineers. It's just that they are not good at specialized research. If they devote themselves to human and worldly sophistication, it's estimated that no one in the world can match them.

Another point is that real gold is not afraid of fire. Jul Engel has absolute confidence in his favorite students. Working with Bao Zixuan is bound to give the boss a comprehensive understanding of o'blake's technology, organization and coordination ability.

O'blake stood up and said, "you are all predecessors and absolute authority in the field of car making. However, this time the U.S. military has requirements for power supply equipment, and our mobile phone company has conducted in-depth research on lithium batteries. I think I can meet the technical requirements. If there is anything wrong, please correct me. "

This is more a polite remark. No one will take the initiative to challenge others' authority. Black cloud mobile phone is definitely one of the most profitable enterprises of the group, or even none. Not only the highest market share, but also the most expensive price.

In this era, mobile phones are luxury goods, and customers don't pay special attention to price. Pay more attention to product performance and services provided. Black cloud has made great efforts in this regard. It is absolutely beyond the times to ask fashion designers to design shapes.

Obrak: "according to the technical requirements put forward by the U.S. military, the traditional liquid battery can't meet the technical requirements at all. Because it needs to add at least one ton of weight, and 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 made a revolutionary breakthrough."

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

"Lithium iron phosphate battery is a lithium-ion battery using lithium iron phosphate as positive material and carbon as negative material. The rated voltage of the monomer is 3.2V and the charging cut-off voltage is 3.6V ~ 3.65v."

"During charging, some lithium ions in lithium iron phosphate are removed, transferred to the negative electrode through electrolyte and embedded into the negative carbon material; 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 chemical reaction. In the process of discharge, the lithium ion comes out of the main pole and reaches the positive pole through the electrolyte. At the same time, the negative pole releases electrons and reaches the positive pole from the external circuit to provide energy for the outside world. "

"Lithium iron phosphate battery has the advantages of high working voltage, high energy density, long cycle life, good safety performance, low self discharge rate and no memory effect."

"If the traditional liquid battery is used, it needs one ton to meet the technical requirements of the U.S. military. Using lithium iron phosphate batteries, the weight will not exceed 50 kg. "

Hearing this, everyone showed an incredible expression. What is this feeling that has directly pushed battery technology forward for 20 years or more.

David Bruce, the head of the assembly and an alumnus of baozixuan Massachusetts Institute of technology, asked, "Dr. obrak, such a small volume and such a large energy density. How to ensure the safety? If it is directly fired by bullets or shells, will it bring disastrous consequences. At that time, the parachute incident during World War II will probably turn to black cloud. "

This concern is normal. After all, they provide military products. Moreover, it provides products for the United States. If the safety performance is not guaranteed, there will be endless trouble.

If the battery explodes, such a large capacity density. The same mortar shell exploded. Isn't it very dangerous for the US military sitting on it. Because the product itself has problems, the whole enterprise, including the senior management of the group, will be severely punished at that time.

Moreover, the parachute story is true. The US military's requirements for military equipment can be said to be picky.

This is a true story between the US Air Force and parachute manufacturers in the middle of World War II. At that time, the safety of parachutes was not perfect, and the qualified rate was only about 60%. Through the efforts of manufacturers, 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 enterprises to achieve even now.

But the U.S. Air Force said no to the company that they required the yield of parachutes to reach 100%. So the general manager of the parachute manufacturer went to the flight brigade to discuss the matter and see if this level could be reduced? Because the manufacturer believes that it is nearly perfect to reach this level, and there is no need to change it. Of course, the US Air Force refused because there was no discount on quality. Later, the military asked to change the method of quality inspection. 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 himself and personally jump off the fuselage in flight. After the implementation of this method, the defect rate immediately becomes zero.

David Bruce worked in jeep before and developed and improved weapons for the U.S. military during the Vietnam War. It can be said that we have a better understanding of the U.S. military, put aside product performance, and safety is definitely the first. It's normal to raise questions, not for anyone, but for normal work discussion.

Obrak: "you can rest assured about security; The electrochemical performance of the cathode material of lithium iron phosphate battery is relatively stable, which determines that it has a stable charge and discharge platform. Therefore, the structure of the battery will not change, burn and explode during the charge and discharge process, and it is still very safe even under special conditions such as short circuit, overcharge, extrusion, acupuncture and so on. "

"Not only that, we will also wrap a layer of metal alloy on the outside of the battery shell. Unless it is directly attacked by guns with a caliber of more than 100mm, there will be no security problems. Even anti tank mines will not cause fatal damage to them. "

"Although a certain weight will be added, the overall weight will be controlled within 80kg. With all kinds of auxiliary equipment, the overall weight of the power system will not exceed 100 kg, which can absolutely meet the requirements; Will not hold the whole project back. "

Obarak has a double doctorate in physics and chemistry, and he is a famous teacher. He is the most demanding for technology, and his guarantee is very important. Don't say it represents authority, at least it can be convincing. If there are other doubts, they can only be verified by actual tests.

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