This civilization is very strong, but the technology tree is a bit crooked.

Chapter 34 The rising sun is just right, suitable for drone test flight! !

"The test lasted for more than half an hour and consumed 8 kilowatt-hours of electricity.

Looking at the power consumption curve, it is the most power-saving at low speeds, and the most stable at subsonic speeds.

After breaking through the speed of sound, the power consumption began to rise rapidly.

In this way, 30% is low speed, 30% is subsonic speed, and the remaining 40% is supersonic speed.

To achieve a comprehensive battery life of 1000 kilometers, the total battery capacity of the drone needs 20 to 22 degrees of electricity.

Considering that I personally prefer flying planes, when I go out at supersonic speeds, I will be Mach 4 and Mach 5 when I go into the air. To be on the safe side, I need more than 30 kilowatt-hours of electricity.”

Before manufacturing the ultra-high-energy battery, Chen Yi printed out the power consumption curve of the drone test.

After some calculations, the battery parameter values ​​required by a drone are obtained.

ion propulsion.

The essence is a propulsion method that consumes electric energy to generate an electric field to accelerate ions.

In this way, the energy source of the ion propulsion drone is naturally also a charging model with a battery.

The pattern is bigger.

This is in response to the national policy, a new energy drone that changes oil to electricity.

"The latest ternary lithium battery has an energy density of 300Wh/KG."

"But to achieve a capacity of 30 kilowatt-hours, it requires a 100-kilogram battery, which is seriously overweight."

Today's drones also need to be sprayed with a thermal barrier protective coating to avoid the high temperature of the thermal barrier and damage the structure of the carbon fiber.

Although carbon fiber is high temperature resistant, it is no problem to withstand a high temperature of 1700 degrees Celsius.

But the resin together with carbon fiber can only withstand the temperature of several hundred degrees Celsius.

Certain coating protection must be carried out to avoid being damaged by the supersonic thermal barrier.

Chen Yi calculated the weight of this part, and it took about 2 kilograms.

Also, take into account the liftoff limit.

The UAV also needs to bring some ion propellants, which requires a budget of about 10 kilograms.

The fuselage occupies another 13.9 kg of weight.

According to the design with a total weight of 40 kg, the budget left for the battery is only 14 kg.

In this way, the energy density of the battery must reach 2150Wh/KG.

"Let's do it, just add some technical reserves to Yifei, technology changes the world."

With a shout, Chen Yi kicked down the Yadi Sanyuan lithium electric car next to him, and disassembled all the casing and frame accessories.

Laser scanning obtained the original structure image, Chen Yi put on the virtual helmet, opened the CAD software, and began to optimize these structures by billions of points.

If one method is universal, then all methods are universal, and everything is harmonious.

Reading information and virtual learning, Chen Yi is now proficient in supersonic aircraft, structural design of space vehicles, and aerodynamic layout design.

Now in turn, designing and optimizing the structure of an electric car is not too simple.

In less than half an hour, the structural stability of the electric vehicle was optimized, the structural center of gravity was also optimized, and the final aerodynamic layout of the car body was also optimized.
The two carbon fiber 3D printers next to them began to spray hot powder, printing out the frame and body shell of the electric car one by one like building a house.

Eleven at night.

The components of the electric car are printed.

Chen Yi took it to the spray booth and sprayed paint on these components one by one.

After the paint dries, assemble it.

An electric car made of carbon fiber, with a low profile and slender shape, just like a sci-fi product, has just been released.

[Item: An exquisite and beautiful carbon fiber electric car]

[Attributes: Energy x6.2, Speed ​​x3.8, Electric Control x5.2, Stability x27.3, Strength x19.2, Beauty x22.8]

[Note: This is an exquisite electric car that uses carbon fiber and is expensive. Although it has an aerospace-grade aerodynamic layout, an aerospace-grade stable design, and an aerospace-grade center of gravity design, don’t worry, it still only has a top speed of 25km/h .】

"Gan!"

"Forget about the new national speed limit!"

"A horse with fighting spirit, as long as your horse can run at a speed of 30 kilometers per hour, no electric car can catch up with you."

When Chen Yi saw the comments on the electric car, he was speechless for a moment.

"I didn't think about the speed limit of the new national standard in advance. It's so late, it's not convenient to find someone to release the speed limit."

"Now the total attribute exceeds 80. According to the rule that the maximum attribute cannot exceed the sum of the remaining attributes, the energy attribute can be adjusted and upgraded to more than 40, which should be enough."

Chen Yiyuan wanted to find someone to decode the code and cancel the speed limit of electric vehicles.

But look at the time.

It was almost twelve o'clock in the morning, and he put down his phone again.

Calculate the initial total attribute of the electric vehicle, and find that the energy attribute can be adjusted to 40.

Chen Yi decided not to find anyone to release the control, and started to do it now.

Colorful rays of light bloom.

Wait for the light to dissipate.

Electric cars, which were originally like science fiction works, began to return to the modern style.

[Aesthetics: 22.8→12.8]

【Energy: 6.2→16.2】

[Detecting that a certain attribute exceeds the initial value, do you want to read the information?whether! 】

"Read!"

Without hesitation, Chen Yi chose to read.

A lot of information came to mind, and soon, Chen Yi understood the technical information.

"All solid-state lithium battery, the technology is so-so, the energy density is 860Wh/KG continue!"

Chen Yi continued, reducing attributes such as stability and strength, and adjusting and upgrading to energy attributes.

A few minutes passed, the light dissipated, and Chen Yi continued to read the information.

"The energy attribute is 26.2, the negative electrode is replaced by a semi-silicon carbon material from a graphite material, and the energy density has reached 1890Wh/KG."

"It seems that this negative electrode silicon carbon material should be the main direction of the next generation of lithium batteries."

Continue to adjust and read the information.

The energy attribute is 36.2, and the anode material becomes an all-silicon carbon material.

The energy density has reached 3689Wh/KG, which is a leap forward.

The energy attribute is 41.2, and the ratio of silicon-carbon anode materials has been optimized.

The structure of the battery is optimized, and the energy density is 5216Wh/KG.

"5216Wh/KG, I feel that it is not the limit of carbon-silicon anode materials. Continue to optimize, and it should be able to reach the energy density of 6000Wh/KG."

"But if we really want to get here, it should almost be the energy limit of lithium chemical batteries."

Chen Yi read all the information and analyzed it in his mind.

This all-solid-state carbon-silicon lithium battery with an energy density of 5216Wh/KG still has a certain room for optimization.

However, no matter how optimized, Chen Yi guessed that the density limit of the lithium battery was almost reached.

Although it is rumored that there are 1.2 Wh/KG lithium-air batteries.

But Chen Yi, who has a certain understanding of this aspect, understands that 1.2 Wh/KG is an artistic lie calculated only from the mole molecule without all other battery components.

Real lithium air is difficult to break through even 1000Wh/KG, and the technology is very difficult, and precious metals such as gold are needed.

According to the full set of battery technology read, Chen Yi adjusted the technology with 26.2 attributes and an energy density of 1890Wh/KG.

Part of the energy density is reduced to further improve safety.

Finally, a 1400Wh/KG semi-silicon carbon lithium battery solution that is a little safer than lithium iron phosphate was released.

Send this carbon-silicon battery technology and preparation process to He Yu.

Before Chen Yi opened the studio, he manufactured ducted model airplanes and configured advanced battery production equipment.

The sky is bright.

Chen Yi used up all seven fire extinguishers in the studio.

A set of carbon fiber packages weighing 14 kg, a single modular design, and batteries connected in series were finally successfully manufactured by him.

[Item: Ultra-high-energy carbon-silicon lithium battery]

[Attributes: Energy x40.8, Safety x10 (-8.8), Strength x19.2]

The three core attributes of unpretentiousness.

Among them, the safety attribute of 10 in theory and 8.8 in practice represents Chen Yi's rigorous manufacturing process.

"This battery is so difficult, it's completely different from the previous ones."

Chen Yi snapped his tongue twice, subtracting 5 points from the energy and intensity each, and raising the safety to 11.2.

Safety exceeds the theoretical value of the design to ensure that there will be no drone accidents where the battery catches fire in mid-air.

"The overall energy density is 3480Wh/KG, fully charged to 48 degrees.

In addition, the battery is a single modular design. If the series connection method is improved, the control program can be adjusted, and the auxiliary fuel tank can be discarded. Oh, no, it is a waste battery disposal program.

Which battery is used up, the drone will throw away that battery, further reducing the weight of the fuselage.

With such a multi-pronged approach, even if you like flying planes, it can reach half the battery life of modern fighter jets, and 1500 kilometers is no problem at all.”

Chen Yi installed the battery on the drone.

Improve the series connection method and control program, and then spray a layer of thermal barrier protective coating on the UAV.

It's nine o'clock, and the sun is just right, suitable for drone test flights!
(End of this chapter)