Relationship between carbon fiber battery box and electric vehicle

The electric vehicle is abbreviated as Beifu. It is a kind of car that uses a single battery as the energy source for energy storage. It supplies electric energy to the motor through the battery to drive the motor to run, thus driving the car. Under the background of the depletion of global petroleum resources, the Chinese auto industry has taken the initiative to respond, with electric vehicles as the representative.

The electric vehicle is abbreviated as Beifu. It is a kind of car that uses a single battery as the energy source for energy storage. It supplies electric energy to the motor through the battery to drive the motor to run, thus driving the car. Under the background of the depletion of global petroleum resources, the Chinese auto industry has taken the initiative to respond. The new energy vehicles represented by electric vehicles have quietly emerged. In the first half of 2016, the global sales of electric vehicles reached 12.2678 million units. In comparison, the sales volume in the United States is 64.57 million, Norway 220,461, France 18,631, Japan 12,846,000, Germany 106.77 million, China is almost twice the number of second-place sales, deservedly become the world The country with the largest sales of electric vehicles.

China is not only the largest sales market for electric vehicles but also the largest producer of electric vehicles. According to data from the China Association of Automobile Manufacturers, in 2015, China produced 404,471 electric vehicles, accounting for 34.4% of the global electric vehicle market, and the United States was second only to 20.9%.

China's rapid development in the electric vehicle industry cannot be separated from the huge subsidies invested by the government and the guidance of various preferential policies. On the other hand, the application of various new technologies and new materials is gradually correcting the “change of pollution”. From the perspective of the terminal, the electric vehicle is solved, for example, the carbon fiber material is used instead of the traditional metal material, energy consumption is reduced by means of lightweight, and effective control is obtained at the source of pollution. The following is an example of a carbon fiber power battery case produced by Wuxi Weisheng New Material Technology Co., Ltd. for a large electric vehicle main engine factory in China, and analyzes the significance of new materials and new technologies for electric vehicles.

The battery case is a carrier for the new energy vehicle power battery, which is generally installed in the lower part of the vehicle body and is mainly used to protect the lithium battery from being damaged when it is subjected to external collision and extrusion. The traditional battery compartment of the vehicle is cast by steel plate, aluminum alloy and the like, and then the surface is sprayed, and the carbon fiber has high specific strength, which can reach 5 times of the ordinary steel, and the composite density of the carbon fiber and the epoxy resin. It is only 1.6 kg/m3. It is a typical high-strength lightweight material, and it also has excellent corrosion resistance and flame retardancy, so it is an ideal substitute for the traditional metal battery case in terms of performance.

Wuxi Weisheng New Material Technology Co., Ltd. has a series of operation experience in carbon fiber composite material modification research and development, carbon fiber automobile parts manufacturing, etc. In the manufacturing process of the vehicle battery case, the autoclave process suitable for mass production is adopted. Firstly, the negative mold is made according to the volume of the battery box, and the layup of the prepreg is designed. The outermost layer is made of 3k carbon fiber prepreg. The remaining layers are determined according to the thickness and load-bearing capacity of the box. After the paving layer is finished in the mold, it is vacuumed by a sealing strip, a vacuum pump, etc., and then placed in a hot press tank to be heated and solidified. After cooling, the mold is released, and the parts requiring opening and cutting are refined. Processing to facilitate the installation of metal joints connected to the car body structure. The connection between the metal fastener and the battery case can be pre-embedded and glued. Generally, the depth of the pre-buried can control the tensile strength of the joint. In order to improve the product safety factor, all carbon fiber battery cases produced by VIA New Materials must pass relevant tests including fire, vibration, and impact.

It is reported that the carbon fiber composite power battery case weighs only 2.7 kilograms, which can reduce the weight by 80% compared with the battery case made of traditional steel structure materials. It can also meet the relevant technical requirements in terms of strength and load. More importantly, because of the harsh operating environment under the car body, the carbon fiber battery case exhibits corrosion resistance, water resistance, flame retardancy, and long service life to cope with and solve these problems. In short, VIA New Materials successfully reduced the thickness and weight of the box material and increased the energy density through the use of carbon fiber materials to ensure the structural strength, thus effectively improving the application index of electric vehicles.

The use of carbon fiber cell bodies is only one example of carbon fiber composites used in new energy vehicles represented by electric vehicles. This lightweight case can be replicated, extended, and extended to more parts of the body. The ultimate significance of lightning is to reduce the weight of the car body and reduce energy consumption. Even if it is "polluted in another way", pollution will be minimized. As the Chinese government adjusts the National Energy structure by promoting electric cars, reducing atmospheric pollution, The application of new materials such as carbon fiber will help electric vehicles improve their performance and gain more competitive space in industrial structure.

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