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        Application of extruded aluminum in electric vehicle

        Update time:2020-10-09 17:23:18Number of clicks:0次
        Electric vehicles (BEVS) are coming to us like a tide, and the era of electric vehicles has come. In the first nine months of 2019, about 175000 electric vehicles were sold in the United States. Undoubtedly, Tesla is the best seller, accounting for about 80% of the market share.

        West Aluminum - West Aluminum Industry Telecom: Electric vehicles (BEVS) are coming to us like a tide, and the era of electric vehicles has come. In the first nine months of 2019, about 175000 electric vehicles were sold in the United States. Undoubtedly, Tesla is the best seller, accounting for about 80% of the market share. There are 13 other competing auto companies, such as general motors, Nissan, Audi, BMW, Volkswagen and Hyundai in Korea.

        Due to the influx of all kinds of electric vehicles in the U.S. market, the prices are also quite chaotic. First, the four door taycan sports cars of Porsche company, and then the EQC of Mercedes. At the beginning of 2020, Tesla's model y, Ford's mustangmach-e and German Volkswagen's id.4, followed by Volvo's xc40bev and minicooper se, will continue in the future There will be more new electric vehicles coming out one after another. It is estimated that the sales of electric vehicles in the North American automobile market will reach 1 million in 2025.

        Application of extruded aluminum in electric vehicle

        Extruded aluminum plays an important role in electric vehicles. First, the battery system must be made of lightweight materials, which is more important than in other cars; second, it is a strong competitor in the manufacture of battery trays and cooling systems, as well as a good material for making motor shells.

        Weight and stroke

        The weight of an electric car limits its travel. According to Ducker worldwide, the mass of Volkswagen's e-Golf (replaced by id.4) electric vehicle battery system is more than 227kg, which is heavier than that of the same type of internal combustion engine (ice). The mass of battery, motor, control system, wire and cable of electric vehicle is more than 454kg; battery mass of teslas electric vehicle is 544kg, motor capacity is 85kwh, accounting for 27% of vehicle weight; cherybolt electric vehicle is the same, 66kwh, battery mass is 436kg, accounting for 26% of vehicle weight.

        Although the energy density of the battery is increasing, the willingness of car buyers is that the range can be significantly increased, and the weight loss is not the top priority. In a word, the total weight of automobiles will increase by 136kg-180kg due to the addition of ADAS (Advanced Driver assistance systems) hardware, warning system and front collision warning / automatic braking system.

        Extrusion aluminum parts and other aluminum parts are the most effective measures to reduce the quality of automobile. The cross body beam / instrument panel, roof beam, bottom beam and so on can be made of extruded aluminum. At the same time, the hollow thin-walled extrusion of complex aluminum profiles can further reduce the weight of parts and components. More and more electric vehicles are manufactured with extruded aluminum Car parts are of strategic significance. Electric vehicles should be fully aluminized. The so-called full Aluminization means that under the current technical conditions, on the premise of ensuring driving safety and riding comfort, all parts that can be made of aluminum alloy and magnesium alloy are made of light metal materials.

        According to the data of CRU, the total consumption of ABS in the world in 2019 is about 1700kt, including 950kt in North America, 550kt in Europe, 90kt in China and 110kt in other markets. According to the aluminum consumption assessment report of China Automotive Industry (2016-230) issued by the International Aluminum Association in October 2019, it is predicted that the demand in 2030 will be 9100kt, with an annual compound growth rate of 8.9%. In 2020, China's implementation of the "new energy vehicle subsidy exemption from purchase tax policy for two years" measures will reduce the cost pressure of the industrial chain, give more growth space to enterprises with core technology and willing to invest in R & D, and expand the application of aluminum products. Not only will the consumption of sheet metal for cover parts increase greatly, but also the consumption of outer plate products, battery bottom plate products and power battery foil will increase simultaneously.

        Battery system tray

        Battery system housing is a large key component of electric vehicle. It can be made of extruded aluminum or plate, but the former is the main part. By the way, in the translation of housing, there are "tray", some "shell" and "battery disk". Before the relevant standards give a calibration name, it is recommended to use the word "tray". The function of the tray: hold the battery system, prevent collision, prevent bottom contact, heat dissipation, easy maintenance, assembly, etc.

        A typical battery system tray is like a skateboard, located between the two axles of the car, while the motor and control system are placed on the axle. Generally, the battery tray of electric vehicle is 1980mm ~ 2160mm in length, slightly larger than 1532mm in width and 127mm ~ 140mm in height. For example, the battery tray of Audi e-tron electric vehicle is about 2921mm long and 1930mm wide, while that of Jaguar i-race electric vehicle is 2972mm long and 1895mm wide.

        Thermal control of battery

        The battery tray should have good heat dissipation performance. When the battery works, it will always release heat, so the heat must be dissipated in time. Therefore, the battery tray is equipped with a cooling system to keep the whole system within the designed temperature window of 20 ℃ ~ 40 ℃, and the change range should not be large, and should be lower than 5 ℃. In order to achieve this kind of strict control, the best measure at present is to set up indirect liquid cooling parts, which are aluminum tubes. Liquid ethylene glycol circulates in the pipes, and the cooling parts are meshed. Nissan used cooling fins earlier, but the National Renewable Energy Lab (NREL) believes that the energy consumption of air cooling system is 2-3 times of that of liquid system. Meanwhile, the laboratory points out that fin air cooling system needs more extruded aluminum


        (Chongqing Xialu Xinda Aluminum Industry Co., Ltd. Publicity Department collates contributions)


        Source: Network

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