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The "Super Assists" of New Energy Vehicles - Carbon Fiber Composite Materials

Views:120 Author: Publish Time: 2022-03-03 Origin:

   More than 90% of carbon fiber is carbon atoms, which is lighter than other metals. In addition, because carbon molecules are regularly arranged in a two-dimensional network structure in the fiber direction, they have strong and tough properties.

图一

Above is a comparison of 6-micron diameter carbon fibers with human hair below.

   It has been reported that CFRP materials have demonstrated superior safety performance in both column and side impacts. The CFRP never sags even when locally subjected to heavier point force. Passengers and battery packs are perfectly protected.

图二

CFRP parts are more than 50% lighter than similar steel parts, and more than 30% lighter than aluminum parts, yet can provide the same strength.

CFRP is an inevitable choice for new energy vehicles.

1-The requirements for the construction type of electric vehicles are very unique: the drive train of an electric vehicle is heavier than that of an internal combustion engine vehicle with a full fuel tank. Under the conditions of the same driving range, the weight of electric vehicles is more than 200~300 kg or more than traditional vehicles. Therefore, in order to ensure good driving range and affordable cost of electric vehicles, the body weight of electric vehicles must be reduced by more than 50%. Among all lightweight materials, CFRP is the only advanced material that can reduce the weight of steel components by 50-60%, yet provide the same strength.
2-The main advantage of CFRP is its strength-to-weight ratio and stiffness-to-weight ratio. In addition, CFRP also has high corrosion resistance and strong climate stability, its service life is significantly longer than that of metal materials, and does not require expensive anti-corrosion protection measures.
3-In addition, CFRP materials have very excellent energy absorption properties. In the column impact and side impact tests, the CFRP material showed superior safety performance. From the beginning of creative design, positioning the technical route of lightweight, high-volume and low-cost.
4-For new energy vehicles, especially pure electric vehicles, it is very important to consistently consider the weight of the vehicle to the maximum extent from the creative design, because in addition to balancing the weight added by the battery, the weight of the vehicle is also an important factor limiting the driving range.
  The application of CFRP in new energy vehicles is not the higher the strength and modulus, the better, but the cheaper the better the cost under the premise of meeting the strength and safety of new energy vehicles. Not only should we promote cheap large tow carbon fiber and its craft products, but also appropriately use recycled carbon fiber to minimize the manufacturing cost of new energy vehicles.

CFRP new energy vehicle case:     图三

The i3 carbon fiber monocoque passenger compartment has high toughness and high energy absorption capacity. In the Euro NCAP test, the i3 achieved excellent results in both the 64km/h frontal impact test and the 32km/h side impact test.
The i3 series 4-seater pure electric vehicle mass-produced by of Germany adopts a CFRP-made single-structure passenger compartment module and an aluminum alloy-structured chassis module. The curb weight is only 1195kg, of which the lithium-ion battery weighs 230kg and the CFRP weight It is 140kg, which is 250~350kg lighter than traditional electric vehicles.

Japan Toray CFRP new energy vehicle case:

The two-seater TEEWAVE AR1 pure electric concept car developed by Japan's Toray Company has a curb weight of only 846kg, of which the lithium-ion battery weighs 220kg and the CFRP uses about 160kg, which is 53% lighter than the steel car.
Toray’s CFRP monocoque is a hollow structure that is integrally formed and weighs only 45kg, which is much lower than 50% of the steel EV body; the number of parts is only 3, which is 1/20 of the steel EV body. Less than 10 minutes.

China Chery CFRP new energy vehicle case:

图四

Chery Arrizo 7 plug-in hybrid concept car

Chery launched the plug-in hybrid Arrizo 7 at this year's Beijing Auto Show. The carbon fiber body of this car was jointly researched and built by Chery and the Chinese Academy of Sciences. Chery claims that this is the first body made of carbon fiber in China. Vehicles constructed of composite materials.

China Great Wall Huaguan CFRP new energy vehicle case:

图五

At this year's Beijing Auto Show, Beijing Great Wall Huaguan Automobile Technology Development Co., Ltd. released the company's latest work, a pure electric sports car concept called EVENT. According to reports, as the first pure electric sports car independently developed by China with mass production status, it is designed with energy saving and environmental protection as the starting point.

Great Wall Huaguan EVENT adopts CFRP material as a whole, so that the product itself can not only ensure better mechanical and safety performance than traditional metal sheet metal, but also greatly reduce the weight of the product and improve the power and economy of the product.

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