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Automobile carbon fiber battery box

Views:91 Author: Publish Time: 2022-12-02 Origin:

           Carbon fiber is a new type of high-strength, high-modulus fiber material with a carbon content of more than 95%. Its strength is 10 times higher than that of steel, but its weight is only 1/4 of that of steel. The tensile strength is generally above 3500MPa, which is 7 to 9 times that of steel, and it has good tolerance to chemical substances such as acid, alkali, salt, etc., and has strong shock resistance and vibration absorption ability. When encountering external impact, the energy of carbon fiber absorption rate is 3-5 times that of steel, and the safety is higher. Based on the above advantages of carbon fiber, it is applied to the battery box structure of new energy vehicles.

             Under normal circumstances, 70% of the fuel is consumed by the weight of the car body. Therefore, the primary problem of reducing the fuel consumption of automobiles is to reduce the weight of the automobile. The specific gravity of carbon fiber is 1.5~2.0g/cm3. The application of carbon fiber materials in automobiles can not only reduce their own weight, improve fuel efficiency, but also indirectly reduce carbon dioxide emissions. The amount can respond to the country's call for "green travel". Generally, the cabinets of large electric vehicles are mostly welded by steel plates; small electric vehicles use chassis-mounted battery packs, so the quality requirements for the battery cabinets are particularly high. However, the battery box made of light and high-strength carbon fiber composite material can share the pressure of battery quality and protect the battery module.

           For new energy vehicles, the power battery is the core component, which plays a key role in the working safety and protection of the battery pack. Therefore, compared with other parts of the car body, the material selection of the battery box has strict requirements on anti-collision, waterproof, fireproof, dustproof, and other aspects. The battery box of a small electric vehicle is generally installed at the bottom of the car body, but the operating environment at the bottom of the car body is relatively harsh. The material of the box body must be waterproof and dustproof, and it must also resist the erosion of the road environment. During the operation of the vehicle, the battery is also subjected to relatively large shocks and vibrations. In addition to containing and protecting the battery, the battery box also needs to be able to effectively isolate people from contact with the battery, so the requirements for the safety protection level of the battery box are also very high.

            FUTURE is a carbon fiber box customization company. It has provided carbon fiber battery boxes and other carbon fiber car structural parts for many car manufacturers. Because these companies have relatively sophisticated overall designs and relatively high requirements for the operating environment of car parts, it is necessary to consider the structural design, mechanical properties, high-temperature resistance, and corrosion resistance when designing the car battery box.

           In the production process of the vehicle battery box, the autoclave process is adopted. First, make the female mold according to the volume size of the battery box, and then design the layup of the prepreg. The outermost layer uses 3k carbon fiber prepreg, and the other layups are determined according to the thickness of the box and the load-bearing force and determine the remaining unidirectional prepreg After laying the material in the mold, vacuum it through sealing strips, vacuum pumps, etc., then put it in an autoclave to heat and solidify, and demould after cooling, and finish the parts that need to be opened and cut, so that the metal joints can be installed to connect with the car body structure. The connection between the metal fastener and the battery box can be pre-embedded and glued. Generally, the depth of the pre-embedded control is used to control the tensile strength of the joint. The carbon fiber battery box must pass related tests including fire and simulated impact.

             The carbon fiber battery box is not only a successful case of new energy vehicle application but also has a good model and promotion effect on vehicle lightweight. It helps to reduce the weight of the vehicle body, reduce energy consumption, and reduce exhaust emissions.

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