Qin Hai noticed Zhang Daiwei's expression, but he just smiled and did not explain anything to Kaan. This kind of thing is Qin Hai's favorite thing to do. He believed that after reading the whole experiment, Zhang Daiwei would know that he was wrong.
How outrageous.
In the blink of an eye, the experiment had been going on for 5 minutes, and it was time for Zhang Daiwei to think that the battery power was about to be exhausted. However, the speed of the electric fan did not slow down at all, and it was still whistling strongly. Zhang Daiwei nodded, it was possible to have such power
The output capacity, coupled with the power that is no less than that of ordinary nickel-cadmium batteries, is suitable for use in electric vehicles. No wonder Qin Hai specially asked him to come over to visit.
6 minutes later, the fan is still spinning at high speed...
7 minutes…
8 minutes…
Zhang Daiwei's eyes were a little straightened. No way, the power stored in this small box is actually so huge. Based on this calculation, the volume of the battery box of the electric vehicle will be reduced by half, and the weight will be reduced in the same proportion, which means
Electric vehicles can have more space for riding, which is the key competitiveness of electric vehicles.
One of the disadvantages of electric vehicles is that the battery takes up too much weight. If the number of batteries is reduced, the cruising range of the electric vehicle will be greatly reduced. Common battery vehicles in later generations generally have a cruising range of more than 300 kilometers, so this requires
Install batteries weighing more than 500 kilograms. Although the engine of an electric car
, gearboxes, etc. are lighter than fuel vehicles, but they cannot offset the weight of the battery at all. What engineers are diligently pursuing is to increase the specific energy of the battery, that is, the amount of electricity stored per kilogram of weight, thereby reducing the total weight of the battery in the car.
Judging from this experiment, the specific energy of the battery in front of us is also surprising.
10 minutes…
11 minutes…
12 minutes and 17 seconds!
The red indicator light on the battery box suddenly went out, the inverter made a "click" sound, cutting off the power supply, and the electric fan cut off power. The fan blades continued to rotate with inertia, gradually slowing down, and finally stopped.
Come down.
Zhang Daiwei didn't wait for the fan blades to stop, then he clapped his hands with a joyful smile on his face. He said to Ka'an: "Mr. Ka'an, this battery is very good. It's the best I've ever seen."
The best battery! With such a battery, our new energy vehicles will be truly practical.”
"Mr. Zhang, don't worry, the experiment is not over yet." Qin Hai interrupted Zhang Daiwei with a smile.
"It's not over yet?" Zhang Daiwei asked in surprise, isn't this not perfect enough?
An assistant disconnected the connection line between the battery box and the inverter, then pulled another power cord and plugged one end into the battery box and the other end into the wall power socket. Zhang Daiwei could see that.
This is charging the battery. It is probably ready to be fully charged before doing the next set of experiments.
"While charging, please ask Mr. Ka'an to introduce this new type of battery to me." Zhang Daiwei looked at Ka'an and said. In his experience, the battery charging time is very long, even with the so-called
"Fast charging" takes at least half an hour, and this is for this small battery. If it is a 500 kilogram battery used in a car, it would be a miracle to fully charge it in six or seven hours.
This time it was Kaan's turn to shrug his shoulders. He shook his head and said, "Let's talk about it after reading the experiment. I'm worried that I won't be able to explain things clearly within two minutes."
"What, two minutes?" Zhang Daiwei was stunned.
Before he could react, Kaan's assistant had already unplugged the battery's power cord. The total charging time was less than a minute. The two assistants reconnected the battery box to the inverter as before.
, press the switch, and see the electric fan whirring again.
"This, this, this..." Zhang Daiwei felt that all the blood in his body was rushing to his head, making him feel dizzy. He finally controlled his excitement, pointed at the battery box and asked Qin Hai: "This
Is it what you said, super capacitor!"
"That's right." Qin Hai had long expected Zhang Daiwei's performance. It can be said that no one knows the value of supercapacitors better than Zhang Daiwei. Therefore, when witnessing the emergence of supercapacitors with his own eyes, no one will be more confident than Zhang Daiwei.
ecstatic.
I just mentioned that one of the shortcomings of electric cars is that the battery is too heavy, and its biggest shortcoming, which is the so-called "biggest one", is that the battery charging time of electric cars is too long, making it unable to charge as well as fuel cars.
Replenish energy at any time.
A fuel car can drive 500 to 700 kilometers with a full charge. Then as long as you find a gas station, you can fill up the tank in a few minutes and continue moving. However, an electric car can only drive 300 kilometers with a full charge, and then it takes a while
It takes five or six hours to fully charge. This way
Now, electric cars can only be used for short-distance operations, driving 300 kilometers a day, and then spending an entire night charging. This limitation is fatal to electric cars, and it greatly limits the market for electric cars. For ordinary families,
, who would buy a car that cannot travel long distances?
There are two types of energy storage devices for electric vehicles, one is a rechargeable battery, and the other is a supercapacitor with a capacity far greater than that of an ordinary capacitor. The advantage of a capacitor is that it charges and discharges very quickly, and in theory it can even be fully charged instantly.
And the degree of instant release, currently, the premise is that the external circuit will not be burned out. The feature of fast charging can solve the problem of charging speed, while the feature of fast discharge meets the requirements of power output.
Only then did Zhang Daiwei understand why Kaan had dared to confidently say that he could increase the power output by 10 times. If the load capacity of the inverter and the heating of the wires were not considered, it would be easy to increase the output power of the supercapacitor by 100 times.
things.
A few years ago, Qin Hai once told Zhang Daiwei about the idea of supercapacitors. Zhang Daiwei only had a dubious attitude towards it and quickly ignored it. The reason is that the rechargeable battery already has enough power.
technical reserves, while supercapacitors are still in the laboratory verification stage. Manufacturers of new energy vehicles around the world are committed to improving existing rechargeable batteries. Even if some manufacturers propose the concept of supercapacitor vehicles, they are limited to one
a long-term expectation.
Who would have thought that Qin Hai had quietly solved the problem of supercapacitors. The specific energy, power output capability and charging speed of the capacitors had all reached a near-perfect level. How could this not make Zhang Daiwei crazy?
"Mr. Ka'an is an expert at the Brazilian Institute of Aeronautical Technology and has made outstanding achievements in superconductivity and supercapacitors. This time, our School of Materials has specially hired Mr. Ka'an as the chief expert of the supercapacitor laboratory. The battery box in front of us is
The graphene supercapacitor recently developed by Mr. Kaan." Qin Hai introduced it to Zhang Daiwei.
The conceptual design of supercapacitors has been around for a long time, but research progress has been very slow. One of the key factors is the restriction of electrode materials. The principle of capacitors is simply to use some kind of medium to separate two electrodes.
Positive charges and negative charges are stored on the electrodes respectively, thus achieving the effect of electricity storage. To expand the capacity of the capacitor, one is to increase the electricity storage capacity per unit area of the electrode, and the other is to put more area into a limited space.
For large electrodes, better electrode materials need to be found.
The discovery of graphene has opened a door to the research of supercapacitors. Graphene has a single-layer atomic structure and is the thinnest material in the world. Therefore, a capacitor with a certain volume can accommodate the largest graphene electrode. At the same time,
Graphene’s planar lamellar structure is advantageous
Due to the infiltration of the electrolyte and the adsorption and desorption of ions, it can improve the energy storage density of the capacitor. In Sao Paulo, when Kaan heard Qin Hai’s introduction to graphene, he knew that it was the most ideal capacitor electrode material.
Therefore, he went to Qin Hai without hesitation.
Qin Hai does not need to explain these situations to Zhang Daiwei in detail. He has a specialization in the field, and Zhang Daiwei may not be able to understand such professional knowledge as graphene. However, supercapacitors are right in front of Zhang Daiwei. This technology
Zhang Daiwei is fully aware of the significant impact that the development of new energy vehicles will have.
"Can this kind of capacitor be mass-produced now?" Zhang Daiwei took the battery box containing the supercapacitor, looked at it with admiration, and asked Qin Hai and Ka'an at the same time.
Caanluo said with some regret: "I feel that this kind of capacitor has not yet reached the ideal level that I hope for, so I don't agree to put it into mass production. However, Mr. Qin believes that it is time for mass production."
Qin Hai smiled and said: "Mr. Ka'an, I have not stopped you from optimizing the supercapacitor at all. We are all looking forward to you coming up with better supercapacitors. However, Mr. Zhang can't wait anymore. If we don't
If we carry out mass production of supercapacitors, we will not be able to see prototypes of new energy vehicles in July next year."
"The two things do not conflict." Zhang Daiwei said quickly, "We can launch the first generation of supercapacitors first, and after Mr. Ka'an comes up with better technology, we can launch the second and third generations. Building a car has never been done directly in one step.
, foreign experience is that new and improved models should be launched every three months, and the update of capacitors can be regarded as a major model change, and it is not excessive to change the model every year."
"We are conducting a comprehensive test of supercapacitors, and Mr. Zhang will also cooperate with us to conduct some tests. Our Daqin Group's supercapacitor production line started construction half a year ago, and mass production can be achieved in two months at the latest. The first
The batch production capacity is 4 million pieces per month." Qin Hai introduced to Zhang Daiwei.
"A car uses 4,000 capacitors, and 4 million capacitors can meet the needs of 1,000 cars, so our annual output is 12,000 cars... At present, it is enough." Zhang Daiwei said.
"Annual output of 12,000 vehicles? Too little." Qin Hai said dissatisfied, "Don't worry, 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.