Preparation method of high-strength six-series aluminum alloy for new energy automobile power battery tray

Abstract

This invention discloses a method for preparing high-strength aluminum alloy for power battery trays in new energy vehicles. The method includes a furnace body with four weighing components. Each weighing component includes a placement plate rotatably connected to the upper end of the furnace body. Two telescopic rods are fixedly connected to the upper end of the placement plate, and a load-bearing plate is fixedly connected to the telescopic ends of the two telescopic rods. The adjacent surfaces of the load-bearing plate and the placement plate are elastically connected by a third spring. A stop rod is fixedly connected to the lower end of the load-bearing plate. When melting materials, this invention can automatically limit the weight of other raw materials based on the weight of aluminum ingots and aluminum-silicon intermediate alloys, achieving a precise proportion. Furthermore, before melting, each alloy is crushed to allow for faster melting, improving work efficiency. Larger particles are further crushed to ensure that each alloy is melted in a smaller state.

Description

Technical Field

[0001] This invention relates to the field of power battery tray technology for new energy vehicles, and in particular to a method for preparing high-strength six-series aluminum alloy for power battery trays for new energy vehicles. Background Technology

[0002] New energy vehicles are the future development direction of the automotive field, and reducing the weight of the power battery tray is one of the main means to achieve vehicle lightweighting. The traditional power battery trays in existing cars are made of steel, but the high density of steel limits the development of steel in the lightweighting of new energy vehicles. Since aluminum alloy has a very prominent specific strength advantage compared to steel, and aluminum alloy has good machinability, aluminum alloy has a huge advantage in vehicle lightweighting.

[0003] There are many types of aluminum alloys, and 6-series aluminum alloys are mainly used in power battery trays. With the further development of lightweighting of new energy vehicles, the current 6-series alloy materials can no longer meet the design requirements of cutting-edge power battery trays. Therefore, how to design new 6-series alloy materials to meet the requirements of cutting-edge power battery trays is something we need to consider. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method for preparing high-strength six-series aluminum alloy for power battery trays in new energy vehicles. When melting materials, this invention can automatically limit the weight of other raw materials based on the weight of aluminum ingots and aluminum-silicon intermediate alloys to achieve a precise proportion. Before melting, each alloy is crushed to enable faster melting and improve work efficiency. At the same time, larger particles are crushed again to ensure that each alloy can be melted in a smaller state.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-strength aluminum alloy preparation device for power battery trays in new energy vehicles includes a furnace body. Weighing components are provided on all four sides of the furnace body. Each weighing component includes a placement plate rotatably connected to the upper end of the furnace body. Two telescopic rods are fixedly connected to the upper end of the placement plate. A load-bearing plate is fixedly connected to the telescopic ends of the two telescopic rods. The adjacent surfaces of the load-bearing plate and the placement plate are elastically connected by a third spring. A stop rod is fixedly connected to the lower end of the load-bearing plate. A pressure sensor cooperating with the stop rod is fixedly connected to the upper end of the placement plate. The furnace body has arc-shaped blocks on all four sides, and each arc-shaped block has an arc-shaped groove at its upper end. An arc-shaped rod is provided in each arc-shaped groove. The arc-shaped rod is slidably connected to the inner wall of the arc-shaped groove. The arc-shaped rod and the inner wall of the arc-shaped groove are elastically connected by a second spring. The upper end of each arc-shaped rod is fixedly connected to the lower end of the corresponding placement plate. A pushing assembly is provided on the left side of the furnace body. The pushing assembly is used to lift the four placement plates, thereby pouring the raw materials into the furnace body. A furnace guide groove is provided on the left side of the furnace body. A partition plate is provided on the furnace guide groove.

[0007] Preferably, the pushing component includes a gas injection box disposed on the left side of the furnace body, a hydraulic rod is provided at the bottom of the gas injection box, a piston is fixedly connected to the telescopic end of the hydraulic rod, the piston is slidably connected to the inner wall of the gas injection box, and the top space of the gas injection box is connected to multiple arc-shaped grooves through a connecting pipe.

[0008] Preferably, the furnace body is provided with a crushing assembly, which includes two first rotating rods disposed within the furnace body. Crushing rollers are fitted onto the two first rotating rods. The two ends of the two first rotating rods are rotatably connected to the inner walls of the left and right sides of the furnace body. The furnace body is provided with a transmission cavity. The right ends of the two first rotating rods extend into the transmission cavity and are fixedly connected to rotating gears. A mounting platform is fixedly connected to the right side of the furnace body. A drive motor is mounted on the upper end of the mounting platform. The output shaft of the drive motor extends into the transmission cavity and is fixedly connected to the first rotating rod located on the front side.

[0009] Preferably, the furnace body is provided with a screening assembly, which includes a filter screen disposed inside the furnace body. The left and right sides of the furnace body are provided with telescopic plates. The telescopic ends of the two telescopic plates are fixedly connected to the left and right sides of the filter screen. The left and right sides of the filter screen are elastically connected to the inner walls of the left and right sides of the furnace body through a first spring. The inner bottom of the furnace body is rotatably connected to a second rotating rod. The lower end of the filter screen is provided with an elliptical groove. The upper end of the second rotating rod extends into the elliptical groove and is fixedly connected to a cam.

[0010] Preferably, the furnace body has a vertical cavity, and a fourth rotating rod is vertically arranged in the vertical cavity. The fourth rotating rod is rotatably connected to the inner top and inner bottom of the vertical cavity. The outer wall of the fourth rotating rod is provided with spiral blades. The bottom space of the vertical cavity is connected to the left side space of the furnace body through a feed port, and the top space of the vertical cavity is connected to the left side space of the furnace body through a discharge port.

[0011] Preferably, the lower ends of the second and fourth rotating rods both extend to the outside and are rotatably connected to the third rotating rod above the mounting platform. The third rotating rod and the output shaft of the drive motor are both equipped with bevel gears. The lower end of the third rotating rod passes through the mounting platform. The second, third, and fourth rotating rods are connected by a transmission assembly.

[0012] Preferably, the transmission assembly includes transmission wheels disposed on the second, third, and fourth rotating rods, the three transmission wheels being connected by a transmission belt, and the radius of the transmission wheel on the second rotating rod being five times the radius of the transmission wheels on the third and fourth rotating rods.

[0013] To achieve the above-mentioned objectives, the present invention also provides a method for preparing a high-strength six-series aluminum alloy for a power battery tray in new energy vehicles, comprising the following steps:

[0014] S1: Melt aluminum alloy according to the mass fraction ratio; place aluminum ingots and aluminum-silicon master alloy on the left support plate, and then the other three pressure sensors will generate electrical signals to transmit to the controller. The controller will make the indicator light light up, and add 1) aluminum-copper master alloy, aluminum-manganese master alloy and zinc ingot to the other three support plates in sequence. When the weight of each reaches the ratio weight, the alloy will be automatically poured into the furnace body 1 for crushing and melting.

[0015] S2: Furnace guiding and refining: The melt obtained in step S1 is introduced into the holding furnace through the furnace guiding trough. Argon gas is used to introduce chlorine-containing refining agent into the melt for refining. After that, slag is removed to complete the melt purification process.

[0016] S3: Heating and settling: The melt obtained in step S2 is heated to 750℃-770℃, then allowed to stand for 30 minutes. The melt is then introduced into the filter box and degassing box through a flow channel to further purify the melt. At the same time, at the front end of the filter box, aluminum-titanium-boron wire is uniformly melted into the aluminum melt using a wire feeder.

[0017] S4: Casting: Cast the melt obtained in step S3 at a casting speed of 100-140 mm / min and a cooling water flow rate of 60-100 L / min.

[0018] S5: Homogenization of ingots: The ingots obtained in step S4 are homogenized at a temperature of 550-570℃ for 8-12 hours, and then cooled by water with a cooling intensity of ≥250℃ / h.

[0019] S6: Profile extrusion: The ingot obtained in step S5 is heated to 490-520℃, the extrusion cylinder temperature is controlled at 400-420℃, the power battery box beam mold is used, the profile speed is 4-7m / min, and online quenching extrusion production is carried out, with online cooling intensity ≥7℃ / s.

[0020] S7: Profile aging: The profiles obtained in step S6 are subjected to aging treatment. The heating temperature is 160-180℃, the holding time is 8-9h, and the profiles are air-cooled after being taken out of the furnace.

[0021] The present invention has the following beneficial effects:

[0022] 1. Compared with existing technologies, by setting up multiple pressure sensors, the weight of the other three raw materials can be automatically calculated and weighed based on the weight of aluminum ingots and aluminum-silicon master alloys during aluminum alloy smelting, eliminating the need for manual calculation and weighing, thus greatly reducing the workload of workers.

[0023] 2. Compared with the existing technology, before smelting, when the raw materials are poured into the furnace body, the rotation of the two crushing rollers will crush the four raw materials, so that the raw materials can enter the furnace body in smaller particles for melting, thereby increasing the melting speed of the raw materials.

[0024] 3. Compared with the existing technology, after the raw material is crushed, the rotation of the second rotating rod drives the filter screen to sway left and right to screen the raw material. Then, the large particles of raw material are transported back to the top of the crushing roller for further crushing, thereby ensuring that each raw material can be smelted to a smaller extent, thus increasing the speed of aluminum alloy smelting. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a method for preparing a high-strength six-series aluminum alloy for a power battery tray for new energy vehicles proposed in this invention;

[0026] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0027] Figure 3 for Figure 1 Enlarged structural diagram at point B;

[0028] Figure 4 for Figure 1 Enlarged structural diagram at point C;

[0029] Figure 5 for Figure 1 Top view.

[0030] In the diagram: 1. Furnace body, 2. Drive motor, 3. Bevel gear, 4. First rotating rod, 5. Crushing roller, 6. Rotating gear, 7. Filter screen, 8. Second rotating rod, 9. Elliptical groove, 10. Cam, 11. Third rotating rod, 12. Transmission assembly, 13. Fourth rotating rod, 14. Guide furnace groove, 15. Baffle plate, 16. Gas injection box, 17. Piston, 18. Hydraulic rod, 19. Connecting pipe, 20. Indicator light, 21. Vertical cavity, 22. Spiral blade, 23. Feed inlet, 24. Telescopic plate, 25. First spring, 26. Arc block, 27. Arc groove, 28. Second spring, 29. Arc rod, 30. Placement plate, 31. Pressure sensor, 32. Load-bearing plate, 33. Support rod, 34. Telescopic rod. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] Reference Figure 1-5 A method for manufacturing a high-strength six-series aluminum alloy tray for a new energy vehicle power battery includes a furnace body 1. Weighing components are provided on all four sides of the furnace body 1. Each weighing component includes a placement plate 30 rotatably connected to the upper end of the furnace body 1. Two telescopic rods 34 are fixedly connected to the upper end of the placement plate 30. A load-bearing plate 32 is fixedly connected to the telescopic ends of the two telescopic rods 34. The adjacent surfaces of the load-bearing plate 32 and the placement plate 30 are elastically connected by a third spring. A stop rod 33 is fixedly connected to the lower end of the load-bearing plate 32. A pressure sensor 31 cooperating with the stop rod 33 is fixedly connected to the upper end of the placement plate 30. Arc-shaped components are provided on all four sides of the furnace body 1. Each arc-shaped block 26 has an arc-shaped groove 27 at its upper end, and an arc-shaped rod 29 is provided in each arc-shaped groove 27. The arc-shaped rod 29 is slidably connected to the inner wall of the arc-shaped groove 27, and the arc-shaped rod 29 is elastically connected to the inner wall of the arc-shaped groove 27 by a second spring 28. The upper end of each arc-shaped rod 29 is fixedly connected to the lower end of the corresponding placement plate 30. A controller is provided. The pressure sensor 31 located on the left side generates an electrical signal and transmits it to the controller. The controller will automatically replace the trigger signals of the other three pressure sensors 31 according to the mass ratio. When the electrical signals on the three pressure sensors 31 reach the trigger value, the three indicator lights 20 will be turned off.

[0033] The furnace body 1 has a pushing component on its left side, which is used to lift four placement plates 30 to pour raw materials into the furnace body 1. The furnace body 1 also has a furnace guide trough 14 on its left side, with a partition plate 15 on the trough. The pushing component includes a gas injection box 16 located on the left side of the furnace body 1. The bottom of the gas injection box 16 has a hydraulic rod 18, and the telescopic end of the hydraulic rod 18 is fixedly connected to a piston 17. The piston 17 is slidably connected to the inner wall of the gas injection box 16. The top space of the gas injection box 16 is connected to multiple arc-shaped grooves 27 through a connecting pipe 19.

[0034] The furnace body 1 is equipped with a crushing assembly, which includes two first rotating rods 4 disposed inside the furnace body 1. Crushing rollers 5 are fitted on the two first rotating rods 4. The two ends of the two first rotating rods 4 are rotatably connected to the inner walls of the left and right sides of the furnace body 1. The furnace body 1 is equipped with a transmission cavity. The right ends of the two first rotating rods 4 extend into the transmission cavity and are fixedly connected to a rotating gear 6. A mounting platform is fixedly connected to the right side of the furnace body 1. A drive motor 2 is mounted on the upper end of the mounting platform. The output shaft of the drive motor 2 extends into the transmission cavity and is fixedly connected to the first rotating rod 4 located on the front side.

[0035] The furnace body 1 is equipped with a screening assembly, which includes a filter screen 7 installed inside the furnace body 1. Telescopic plates 24 are provided on both the left and right sides of the furnace body 1. The telescopic ends of the two telescopic plates 24 are fixedly connected to the left and right sides of the filter screen 7. The left and right sides of the filter screen 7 are elastically connected to the inner walls of the left and right sides of the furnace body 1 through a first spring 25. A second rotating rod 8 is rotatably connected to the inner bottom of the furnace body 1. An elliptical groove 9 is provided at the lower end of the filter screen 7. The upper end of the second rotating rod 8 extends into the elliptical groove 9 and is fixedly connected to a cam 10.

[0036] The furnace body 1 has a vertical cavity 21, and a fourth rotating rod 13 is vertically installed in the vertical cavity 21. The fourth rotating rod 13 is rotatably connected to the top and bottom of the vertical cavity 21. The outer wall of the fourth rotating rod 13 is provided with a spiral blade 22. The bottom space of the vertical cavity 21 is connected to the left side space of the furnace body 1 through the feed port 23, and the top space of the vertical cavity 21 is connected to the left side space of the furnace body 1 through the discharge port.

[0037] The lower ends of the second rotating rod 8 and the fourth rotating rod 13 extend to the outside and are rotatably connected to the third rotating rod 11 above the mounting platform. The third rotating rod 11 and the output shaft of the drive motor 2 are both equipped with bevel gears 3. The lower end of the third rotating rod 11 passes through the mounting platform. The second rotating rod 8, the third rotating rod 11 and the fourth rotating rod 13 are connected by a transmission assembly 12. The transmission assembly 12 includes transmission wheels on the second rotating rod 8, the third rotating rod 11 and the fourth rotating rod 13. The three transmission wheels are connected by a transmission belt. The radius of the transmission wheel on the second rotating rod 8 is five times the radius of the transmission wheels on the third rotating rod 11 and the fourth rotating rod 13.

[0038] The chemical composition and mass percentage content of the six-series profiles used in this invention are as follows: Si: 1.5~1.8%, Cu: 0.7~1.0%, Zn: 0.2%~0.6%, Mg: 0.9%~1.3%, Fe≤0.5%, Ti≤0.1%, Mn: 0.9~1.2%, RE≤0.05%, and other elements ≤0.05% individually and ≤0.15% in total.

[0039] To achieve the above-mentioned objectives, the present invention also provides a method for preparing a high-strength six-series aluminum alloy for a power battery tray in new energy vehicles, comprising the following steps:

[0040] S1: Melt aluminum alloy according to the mass fraction ratio; place aluminum ingots and aluminum-silicon master alloy on the left support plate 32, and then the other three pressure sensors 31 will generate electrical signals to transmit to the controller. The controller will make the indicator light 20 light up. Add aluminum-copper master alloy, aluminum-manganese master alloy and zinc ingot to the other three support plates 32 in sequence. When the weight of each reaches the proportion weight, the alloy will be automatically poured into the furnace body 1 for crushing and melting.

[0041] S2: Furnace guiding and refining: The melt obtained in step S1 is introduced into the holding furnace through the furnace guiding tank 14. Argon gas is used to introduce chlorine-containing refining agent into the melt for refining. After that, slag is removed to complete the melt purification process.

[0042] S3: Heating and settling: The melt obtained in step S2 is heated to 750℃-770℃, then allowed to stand for 30 minutes. The melt is then introduced into the filter box and degassing box through a flow channel to further purify the melt. At the same time, at the front end of the filter box, aluminum-titanium-boron wire is uniformly melted into the aluminum melt using a wire feeder.

[0043] S4: Casting: Cast the melt obtained in step S3 at a casting speed of 100-140 mm / min and a cooling water flow rate of 60-100 L / min.

[0044] S5: Homogenization of ingots: The ingots obtained in step S4 are homogenized at a temperature of 550-570℃ for 8-12 hours, and then cooled by water with a cooling intensity of ≥250℃ / h.

[0045] S6: Profile extrusion: The ingot obtained in step S5 is heated to 490-520℃, the extrusion cylinder temperature is controlled at 400-420℃, the power battery box beam mold is used, the profile speed is 4-7m / min, and online quenching extrusion production is carried out, with online cooling intensity ≥7℃ / s.

[0046] S7: Profile aging: The profiles obtained in step S6 are subjected to aging treatment. The heating temperature is 160-180℃, the holding time is 8-9h, and the profiles are air-cooled after being taken out of the furnace.

[0047] The functional principle of this invention can be explained by the following operation: When dissolving the raw materials, aluminum ingots and aluminum-silicon intermediate alloys are first placed on the load-bearing plate 32 located on the left. At this time, due to the gravity of the aluminum ingots and aluminum-silicon intermediate alloys, the load-bearing plate 32 will drive the push rod 33 to exert pressure on the pressure sensor 31, thereby causing the pressure sensor 31 to generate a signal and transmit it to the controller, and the controller controls the three indicator lights 20 to light up.

[0048] When the pressure sensor 31 on the left generates an electrical signal, it will automatically change the minimum trigger signal of the other three pressure sensors 31 according to the mass ratio. Then, aluminum-copper intermediate alloy, aluminum-manganese intermediate alloy, and zinc ingots are placed on the other three load-bearing plates 32. When the weight reaches the signal of the corresponding pressure sensor 31, the corresponding indicator light 20 will be turned off, so that the four raw materials meet the mass ratio requirements.

[0049] When all three indicator lights 20 are turned off, the hydraulic rod 18 will be energized, causing the hydraulic rod 18 to stretch and drive the piston 17 to move upward, thereby forcing the gas in the gas injection box 16 into multiple arc-shaped grooves 27, causing multiple arc-shaped rods 29 to move upward, thereby causing the four placement plates 30 to rotate upward and pour the raw materials into the furnace body 1.

[0050] Since the drive motor 2 is rotating at this time, the two crushing rollers 5 are also rotating, which crushes the four raw materials so that the four raw materials can enter the furnace body 1 as smaller particles, thereby enabling the raw materials to melt and smelt the aluminum alloy quickly.

[0051] When the crushed raw material falls onto the filter screen 7, the first rotating rod 4 drives the third rotating rod 11 to rotate, which in turn drives the second rotating rod 8 and the fourth rotating rod 13 to rotate through the transmission assembly 12. This causes the second rotating rod 8 to drive the cam 10 to rotate. Due to the elastic action of the two first springs 25, the filter screen 7 moves left and right to screen the crushed raw material during the rotation of the cam 10, so that the small raw material can fall into the furnace body 1.

[0052] During the screening process, larger raw materials enter the vertical cavity 21 through the feed inlet 23. Under the rotation of the fourth rotating rod 13, the spiral blades 22 rotate and transport the larger raw materials to the top. Then, they fall above the two crushing rollers 5 through the discharge outlet for further crushing. This ensures that all raw materials can enter the furnace body 1 for melting with smaller particle sizes, thereby increasing the melting speed of the raw materials and improving the preparation efficiency of aluminum alloys.

[0053] After the aluminum alloy is fully prepared, a slag remover is added to remove the slag, and the mixture is stirred more than twice. When the temperature rises to 730-750℃, magnesium ingots are pressed into the melt and stirred. The melt is then discharged through the furnace guide trough 14 and processed in the second step described above.

[0054] Compared with existing technologies, by setting up multiple pressure sensors 31, the weight of the other three raw materials can be automatically calculated and weighed based on the weight of aluminum ingots and aluminum-silicon master alloys during aluminum alloy smelting, eliminating the need for manual calculation and weighing, thus greatly reducing the workload of workers.

[0055] Before smelting, when the raw materials are poured into the furnace body 1, the rotation of the two crushing rollers 5 will crush the four raw materials, so that the raw materials can enter the furnace body 1 in smaller particles for melting, thereby increasing the melting speed of the raw materials.

[0056] Meanwhile, after the raw materials are crushed, the rotation of the second rotating rod 8 drives the filter screen 7 to sway left and right to screen the raw materials. Then, the large particles of raw materials are transported back to the top of the crushing roller 5 for further crushing, thereby ensuring that each raw material can be smelted to a smaller extent, thus increasing the speed of aluminum alloy smelting.

[0057] The specific embodiments are as described, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for preparing high-strength six-series aluminum alloy for power battery trays in new energy vehicles, comprising a furnace body (1), characterized in that: Weighing components are provided on all four sides of the furnace body (1). Each weighing component includes a placement plate (30) rotatably connected to the upper end of the furnace body (1). Two telescopic rods (34) are fixedly connected to the upper end of the placement plate (30). The telescopic ends of the two telescopic rods (34) are fixedly connected to a load-bearing plate (32). The adjacent surfaces of the load-bearing plate (32) and the placement plate (30) are elastically connected by a third spring. A stop rod (33) is fixedly connected to the lower end of the load-bearing plate (32). The upper end of the placement plate (30) is fixedly connected to... A pressure sensor (31) is provided with a stop rod (33). The furnace body (1) is provided with arc blocks (26) on all four sides. Each arc block (26) is provided with an arc groove (27) at its upper end. Each arc groove (27) is provided with an arc rod (29). The arc rod (29) is slidably connected to the inner wall of the arc groove (27). The arc rod (29) is elastically connected to the inner wall of the arc groove (27) through a second spring (28). The upper end of each arc rod (29) is fixedly connected to the lower end of the corresponding placement plate (30). A pushing component is provided on the left side of the furnace body (1). The pushing component is used to lift the four placement plates (30) so that the raw materials are poured into the furnace body (1). A furnace guide groove (14) is provided on the left side of the furnace body (1). A partition plate (15) is provided on the furnace guide groove (14).

2. The high-strength six-series aluminum alloy preparation device for a new energy vehicle power battery tray according to claim 1, characterized in that: The pushing component includes a gas injection box (16) located on the left side of the furnace body (1). The bottom of the gas injection box (16) is provided with a hydraulic rod (18). The telescopic end of the hydraulic rod (18) is fixedly connected to a piston (17). The piston (17) is slidably connected to the inner wall of the gas injection box (16). The top space of the gas injection box (16) is connected to multiple arc-shaped grooves (27) through a connecting pipe (19).

3. The apparatus for preparing high-strength six-series aluminum alloy for power battery trays in new energy vehicles according to claim 1, characterized in that: The furnace body (1) is provided with a crushing assembly, which includes two first rotating rods (4) set inside the furnace body (1). Crushing rollers (5) are sleeved on the two first rotating rods (4). The two ends of the two first rotating rods (4) are rotatably connected to the inner walls of the left and right sides of the furnace body (1). The furnace body (1) is provided with a transmission cavity. The right ends of the two first rotating rods (4) extend into the transmission cavity and are fixedly connected to a rotating gear (6). The right side of the furnace body (1) is fixedly connected to a mounting platform. A drive motor (2) is installed on the upper end of the mounting platform. The output shaft end of the drive motor (2) extends into the transmission cavity and is fixedly connected to the first rotating rod (4) located on the front side.

4. The high-strength six-series aluminum alloy preparation device for new energy vehicle power battery trays according to claim 3, characterized in that: The furnace body (1) is equipped with a screening component, which includes a filter screen (7) installed inside the furnace body (1). The furnace body (1) is equipped with telescopic plates (24) on both the left and right sides. The telescopic ends of the two telescopic plates (24) are fixedly connected to the left and right sides of the filter screen (7). The left and right sides of the filter screen (7) are elastically connected to the inner walls of the left and right sides of the furnace body (1) through a first spring (25). The inner bottom of the furnace body (1) is rotatably connected to a second rotating rod (8). The lower end of the filter screen (7) is provided with an elliptical groove (9). The upper end of the second rotating rod (8) extends into the elliptical groove (9) and is fixedly connected to a cam (10).

5. The apparatus for preparing high-strength six-series aluminum alloy for power battery trays in new energy vehicles according to claim 4, characterized in that: The furnace body (1) is provided with a vertical cavity (21), and a fourth rotating rod (13) is vertically provided in the vertical cavity (21). The fourth rotating rod (13) is rotatably connected to the inner top and inner bottom of the vertical cavity (21). The outer wall of the fourth rotating rod (13) is provided with a spiral blade (22). The bottom space of the vertical cavity (21) is connected to the left side space of the furnace body (1) through the feed port (23). The top space of the vertical cavity (21) is connected to the left side space of the furnace body (1) through the discharge port.

6. The apparatus for preparing high-strength VI-series aluminum alloy for power battery trays in new energy vehicles according to claim 5, characterized in that: The lower ends of the second rotating rod (8) and the fourth rotating rod (13) extend to the outside and are rotatably connected to the right third rotating rod (11) above the mounting platform. The third rotating rod (11) and the output shaft of the drive motor (2) are both provided with bevel gears (3). The lower end of the third rotating rod (11) passes through the mounting platform. The second rotating rod (8), the third rotating rod (11) and the fourth rotating rod (13) are connected by transmission assembly (12).

7. The high-strength six-series aluminum alloy preparation device for a new energy vehicle power battery tray according to claim 6, characterized in that: The transmission assembly (12) includes transmission wheels disposed on the second rotating rod (8), the third rotating rod (11) and the fourth rotating rod (13). The three transmission wheels are connected by a transmission belt. The radius of the transmission wheel on the second rotating rod (8) is five times the radius of the transmission wheels on the third rotating rod (11) and the fourth rotating rod (13).

8. The preparation method of the high-strength six-series aluminum alloy for a new energy vehicle power battery tray according to claim 1, characterized in that, Includes the following steps: S1: Melt aluminum alloy according to mass fraction ratio; place aluminum ingots and aluminum-silicon intermediate alloy on the left support plate (32), and then the other three pressure sensors (31) will generate electrical signals to transmit to the controller. The controller will make the indicator light (20) light up, and add aluminum-copper intermediate alloy, aluminum-manganese intermediate alloy and zinc ingot to the other three support plates (32) in sequence. When each weight reaches the proportion weight, the alloy will be automatically poured into the furnace body (1) for crushing and melting. S2: Furnace guiding and refining: The melt obtained in step S1 is introduced into the holding furnace through the furnace guiding tank (14). Argon gas is used to introduce chlorine-containing refining agent into the melt for refining. After that, slag is removed to complete the melt purification process. S3: Heating and settling: Heat the melt obtained in step S2 to 750℃-770℃, then let it stand for 30 minutes. Then, introduce the melt into the filter box and degassing box through the flow channel to further purify the melt. At the same time, at the front end of the filter box, aluminum titanium boron wire is uniformly melted into the aluminum melt through the wire feeder. S4: Casting: Cast the melt obtained in step S3 at a casting speed of 100-140 mm / min and a cooling water flow rate of 60-100 L / min. S5: Homogenization of ingots: The ingots obtained in step S4 are homogenized at a temperature of 550-570℃ for 8-12 hours, and then cooled by water with a cooling intensity of ≥250℃ / h. S6: Profile extrusion: The ingot obtained in step S5 is heated to 490-520℃, the extrusion cylinder temperature is controlled at 400-420℃, the power battery box beam mold is used, the profile speed is 4-7m / min, and online quenching extrusion production is carried out, with online cooling intensity ≥7℃ / s. S7: Profile aging: The profiles obtained in step S6 are subjected to aging treatment. The heating temperature is 160-180℃, the holding time is 8-9h, and the profiles are air-cooled after being taken out of the furnace.

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