As new energy vehicles are widely used in household vehicles, official vehicles and buses, taxis, and logistics vehicles, according to data, the annual sales volume of new energy vehicles in China will reach the total demand of the automobile market in 2020. More than 5% of the new energy vehicle industry system will be initially established with market-oriented, enterprise-oriented, and close integration of production, education and research. In 2025, it will increase to about 20%, forming an independent and controllable and complete industrial chain. Under the national carbon emission target and the primary energy substitution catalogue, the annual sales volume of new energy vehicles will continue to increase significantly in 2030, with a scale of more than 10 million. Car.
The implementation of the new energy vehicle strategy, China is not too late to start, as early as 2001, the development of new energy vehicles in the "10th Five-Year" period of the "863" major scientific and technological issues. In recent years, governments at all levels have implemented policies such as car subsidies and licensing priorities to promote the consumption of new energy vehicles. The demand and development of new energy vehicles will drive the development of various types of automotive batteries, lightweight bodies and auto parts industries in the new energy era, and also bring unlimited market opportunities to China's aluminum industry.
Unlike traditional vehicles, new energy vehicles use batteries as the driving force to drive the car. It is limited by the weight of the power battery, the battery life range, and the high pressure of the vehicle energy conservation and emission reduction policy. In the vehicle design and material application, the vehicle body Lightweight has become the first issue to be considered by car companies. Therefore, battery-powered new energy vehicles are more urgent than traditional cars to reduce weight. This also opens up a broader market space for lightweight materials such as aluminum.
Among the lightweight materials of automobiles, the comprehensive cost performance of aluminum alloy materials is higher than that of steel, magnesium, plastics and composite materials, which has comparative advantages in application technology, operational safety and recycling. The density of aluminum material is only 1/3 of that of steel, which has obvious weight loss and energy saving effect, and can better improve ride comfort under the premise of ensuring safety. At the same time, aluminum materials are easier to recycle and recycle. The comprehensive cost performance of aluminum has determined that it has become the choice for automotive lightweight applications.
The main applications of aluminum in new energy auto parts are body, hub, chassis, anti-collision beam, floor, power battery and seat. According to the processing form, aluminum for automobiles is mainly divided into three types: die casting, extrusion and calendering. The amount of die castings accounts for about 80%, and the extrusion and calendering parts each account for about 10%. Die-casting parts are mainly used for engines, wheels and other parts. Extrusion parts are mainly used for frame, luggage rack, door beam, etc., and the rolled parts are mainly used for the production of aluminum plates for the body.
Among them, the body includes a body frame made of high-performance aluminum profiles and skins and doors made of high-precision aluminum sheets; aluminum alloy wheels (cast aluminum wheels or forged aluminum wheels); the chassis includes high-strength large-section aluminum profiles and aluminum Alloy forgings; anti-collision beam bumpers made of profiles; new energy passenger car floor; lithium-ion battery including battery positive aluminum foil, battery aluminum shell and battery aluminum tray (European battery trays are all made of aluminum alloy, domestic battery trays have aluminum alloy Material, also available in stainless steel); new energy bus seat system.
In the past, new energy vehicles used steel materials to make electric vehicle power battery trays. Many companies now use aluminum alloy materials. The density of aluminum alloy is 2.7g/cm3, and the advantages of aluminum alloy are obvious in terms of compression and welding. The magnesium alloy has a density of 1.8g/cm3 and the carbon fiber is 1.5g/cm3. These materials are used to produce battery trays, which will greatly improve the lightweight level of new energy vehicles.
It is understood that the battery aluminum tray mainly uses 6 series aluminum profiles. Good plasticity and excellent corrosion resistance, especially stress-free corrosion cracking tendency, good welding performance, making the 6-series aluminum profile very suitable for the application of the project. In order to ensure the quality of the products, advanced welding techniques such as friction stir welding are required to ensure the integral molding of the products.
Application of battery aluminum tray in new energy vehicles
New energy vehicles use more aluminum than ordinary cars. The rapid development of new energy vehicles in China will certainly promote the development potential of aluminum in the segment of new energy vehicles. Aluminum processing enterprises seize this development opportunity and develop High-performance, highly adaptable aluminum or deep-processed aluminum parts undoubtedly open up new sales orientations for enterprises to diversify their application needs.