Material Empire

Qin Hai noticed Zhang Yewei's expression, but he just smiled and didn't explain anything for Kaan. Selling Guanzi is Qin Hai's favorite thing. He believes that after watching the whole experiment, Zhang Weiwei will know how outrageous he is.

In an instant, the experiment had been running for 5 minutes, and it was time for Zhang Yewei to think that the battery was about to run out. But the speed of the electric fan did not slow down at all, and it still whistled strongly. Zhang Weiwei nodded, having such a power output capability, coupled with the power of no less than ordinary nickel-cadmium batteries, it is suitable for the use of electric cars, no wonder Qin Hai specifically asked him to come and visit.

After 6 minutes, the fan is still spinning at high speed ...

7 minutes ...

8 minutes……

Zhang Yanwei's eyes were a little straight, no, the power stored in this small box was so huge. According to this calculation, the battery box volume of electric vehicles will be reduced by half, and the weight will be reduced in proportion. This means that electric vehicles can have more space for riding. This is the key competitiveness of electric vehicles. Be a mother.

One of the disadvantages of electric vehicles is that they take up too much weight. If the number of batteries is reduced, the range of electric vehicles will be greatly reduced. Later generations of common battery vehicles generally need to reach a range of more than 300 kilometers, and for this purpose, batteries of more than 500 kilograms need to be installed. Although the engine and gearbox of electric vehicles are lighter than fuel vehicles, they cannot completely offset the weight of the battery. What the engineers are striving for is to increase the specific energy of the battery, which is the amount of electricity stored per kilogram of weight, thereby reducing the total weight of the battery in the car. From this experiment, the specific energy of this battery is also surprising.

10 minutes……

11 minutes ...

12 minutes and 17 seconds!

The red indicator light on the battery box suddenly went out, and the inverter clicked, cutting off the power supply. The electric fan is powered off, and the fan blades continue to rotate with inertia, gradually slowing down. Finally stopped.

Zhang Weiwei did not wait for the fan blades to stand still, and clapped her hands. With a happy smile on his face, he said to Kaan, "Mr. Kaan, this battery is awesome. This is the best battery I have ever seen! With such a battery, our new energy vehicles have real Practical. "

"Don't worry, President Zhang, the experiment is not over yet." Qin Hai interrupted Zhang Yewei with a smile.

"It's not over yet?" Zhang Yanwei wondered, wasn't this perfect?

An assistant disconnected the battery box from the inverter and pulled another power cable. One plugs into the battery box and the other plugs into a wall outlet. Zhang Weiwei can see that the other party is charging the battery, and it is estimated that it is ready to be fully charged before doing the next set of experiments.

"While charging, please ask me to introduce this new type of battery to me." Zhang Yanwei looked at Ka An and said. In his experience, the battery takes a long time to charge. Even with the so-called "fast charge", it takes at least half an hour, which is for this small battery. If it is the 500 kg battery used in the car. It's a miracle to fill it up in six or seven hours.

It was his turn to shrug his shoulders this time, and he shook his head and said, "Let's finish the experiment and say it again. I'm worried that I can't make things clear in two minutes."

"What. Two minutes?" Zhang Yanwei froze.

Before he could react, Caan's assistant had unplugged the battery power cord again, and the total charging time was even less than one minute. The two assistants reconnected the battery box to the inverter as before, and once they pressed the switch, they saw the electric fan whirling again.

"This, this ..." Zhang Yewei just felt that the whole body's blood was pouring over his head, making him feel dizzy. He finally managed to control his excitement and pointed to the battery box and asked Qin Hai: "Is this what you said, super capacitor!"

"That's right." Qin Hai had long expected Zhang Yanwei's performance. It can be said that no one knows the value of supercapacitors better than Zhang Yewei. Therefore, when witnessing the appearance of super capacitors, no one will be more ecstatic than Zhang Yewei.

One of the shortcomings of the electric car just mentioned is that the battery is too heavy. And its biggest drawback, which is the biggest of the so-called "no one", is that the battery charge time of electric cars is too long, making it unable to replenish energy at any time like fuel cars.

Fuel-fueled cars can drive for 500 to 700 kilometers at a time. Once you find a gas station, you can fill up the fuel tank in a few minutes and continue moving forward. Electric cars can only drive 300 kilometers after being fully charged, and then it takes five or six hours to fully charge. In this way, electric vehicles can only be used for short-distance operation, driving 300 kilometers a day, and then spending a night charging. This limitation is fatal to electric vehicles, which greatly limits the market for electric vehicles. For ordinary families, who would buy a car that cannot run long distances?

There are two types of energy storage devices for electric vehicles. One is a rechargeable battery, and the other is a super capacitor with a capacity far exceeding that of an ordinary capacitor. The advantage of a capacitor is that the speed of charging and discharging is very fast. In theory, it can even reach the instant of full and instant release. At present, the premise is that the external circuit will not be burned because of this. The fast charging feature can solve the problem of charging speed, and the fast discharging feature meets the requirements of power output.

Zhang Weiwei only realized at this time, why Kaan just said with confidence that he could increase the power output by 10 times. If the load capacity of the inverter and the heating of the wires are not considered, it is easy to increase the output power of the super capacitor by 100 times. Things.

A few years ago, Qin Hai once talked to Zhang Yewei about the idea of ​​supercapacitors. Zhang Yewei only had a skeptical attitude about this, and soon left it behind. The reason is not that, that is, the rechargeable battery has enough technical reserves, but the super capacitor is still in the laboratory verification stage. Global manufacturers of new energy vehicles are committed to improving existing rechargeable batteries. Even if some manufacturers put forward the concept of supercapacitor cars, they are limited to a long-term expectation.

Who would have thought that Qin Hai actually silently solved the problem of supercapacitors, and the specific energy, power output capacity, and charging speed of the capacitors reached an almost perfect level. How could this not make Zhang Weiwei crazy?

"Mr. Ka'an is an expert at the Brazilian Institute of Aeronautical Technology. He has outstanding achievements in superconductivity and supercapacitors. This time, our School of Materials specially invited Mr. Ka'an to be the chief expert of the supercapacitor laboratory. In this battery box, The latest graphene supercapacitor developed by Mr. Ka An. "Qin Hai introduced to Zhang Weiwei.

The concept design of supercapacitors has a long history, but the research progress is very slow. One of the key factors is the restriction of electrode materials. The principle of capacitance is simply to use a certain medium to separate two electrodes, and the two electrodes store positive and negative charges, respectively, so as to achieve the effect of electricity storage. To increase the capacity of the capacitor, one is to increase the storage capacity per unit area of ​​the electrode, and the other is to put a larger area of ​​electrode in a limited space. To this end, better electrode materials need to be found.

The discovery of graphene opened the door to the study of supercapacitors. Graphene is a single-layer atomic structure and is the thinnest material in the world. Therefore, a capacitor with a defined volume can accommodate the largest area of ​​graphene electrodes. At the same time, the planar layered sheet structure of graphene is conducive to the infiltration of the electrolyte and the adsorption and desorption of ions, thereby improving the energy storage density of the capacitor. In São Paulo, as soon as Qian Hai heard about Qin Hai's introduction of graphene, he knew that this was the most ideal capacitor electrode material, so he came to Qin Hai without hesitation.

Under these circumstances, Qin Hai does not need to explain to Zhang Yewei in detail, the surgery industry has a specialization, and professional knowledge such as graphene, Zhang Yewei may not be able to understand. However, the super capacitor is right in front of Zhang Weiwei. Zhang Yewei is very clear about the significant impact this technology will have on the development of new energy vehicles.

"Can this capacitor be mass-produced now?" Zhang Yanwei brought the battery box containing the supercapacitor and looked at it eagerly, asking Qin Hai and Ka An at the same time.

Ca'Anello said with regret: "I don't think this capacitor has reached the ideal level I hope at present, so I don't approve of mass production. However, President Qin believes that it is time for mass production."

Qin Hai smiled: "Mr. Ka'an, I have not stopped you from optimizing super capacitors at all ~ www.novelmtl.com ~ We are all looking forward to your better super capacitors. However, Mr. Zhang can't wait now Now, if we don't mass-produce supercapacitors now, we won't be able to see prototypes of new energy vehicles in July next year. "

"The two things don't conflict." Zhang Yanwei said quickly, "We can launch the first generation of super capacitors, and after Mr. Kaan comes up with better technology, we will launch the second and third generations. Building a car has never been a direct step in place The foreign experience is that new and improved models will be introduced every three months, and the capacitor update can be used as a major replacement, and it is not too much to change one generation a year. "

"We are conducting a comprehensive test of supercapacitors, and President Zhang will also cooperate with us for some tests. Our Daqin Group ’s supercapacitor production line has begun construction six months ago, and mass production can be achieved no later than two months. The batch production capacity is 4 million pieces per month. "Qin Hai introduced to Zhang Weiwei.

"A car needs 4,000 capacitors, and 4 million can meet the needs of 1,000 cars. In this way, our annual output is 12,000 ... for now, it is enough." Zhang Yewei said.

"An annual output of 12,000 units? Too few." Qin Hai said dissatisfied. "Rest assured, I will start the construction of the second production line immediately, and expand the production capacity by more than 10 times within half a year." (To be continued) )