A new energy vehicle aluminum alloy frame forming process

Abstract

The invention discloses a forming process of an aluminum alloy frame for new energy vehicles, which belongs to the technical field of aluminum alloy frames. The invention comprises the following steps: homogenizing an aluminum alloy ingot, extruding it into a shape and quenching it while hot to obtain aluminum alloy profiles of different specifications, which are then subjected to heat aging treatment, pretreatment and anodizing treatment in sequence; mixing an epoxy resin and fluorine-modified graphite, adding a curing agent, and continuously stirring and mixing to obtain an epoxy adhesive; impregnating carbon fiber cloth with the epoxy adhesive, and pressing 8-12 layers of carbon fiber cloth to obtain a carbon fiber corrugated plate; bonding a carbon fiber corrugated plate between every two connecting plates with the epoxy adhesive to obtain an energy-absorbing baffle; welding a first frame plate, a second frame plate, a lower base plate, a first connecting member, a second connecting member, a reinforcement member and an energy-absorbing baffle in sequence, and polishing the welds to complete the forming process of the aluminum alloy frame for new energy vehicles; compared with hollow aluminum alloy profiles, the frame has a larger heat dissipation area, which is beneficial to ensuring good heat dissipation performance of lithium battery packs.

Description

Technical Field

[0001] The present invention belongs to the technical field of aluminum alloy frames, and in particular relates to a forming process of an aluminum alloy frame for new energy vehicles. Background Art

[0002] New energy vehicles (NEVs) use unconventional automotive fuels as their power source and integrate advanced technologies in vehicle power control and drive to create vehicles with advanced technical principles, new technologies, and new structures. New energy vehicles include four major types: hybrid electric vehicles, pure electric vehicles, fuel cell electric vehicles, and other new energy vehicles.

[0003] Pure electric vehicles rely entirely on power batteries as their power source. With the popularization of new energy vehicles, it has also driven the rapid development of related industries, especially battery manufacturers. The power batteries of new energy vehicles are mainly lithium batteries. However, if lithium batteries are severely squeezed or punctured during transportation, storage and use, they may cause leakage, leakage, and short circuits, which can easily cause property damage or personal injury. Therefore, in order to ensure the safety and airtightness of lithium batteries, the lithium battery pack needs to be protected by an outer shell. The high-strength battery pack aluminum alloy frame can greatly increase the structural strength of the lithium battery pack. However, an overly complex structure not only increases the weight of the vehicle body, but also affects the heat dissipation effect of the battery pack. In order to simultaneously ensure its mechanical strength and heat dissipation effect, a new energy vehicle aluminum alloy frame forming process is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a new energy vehicle aluminum alloy frame forming process to solve the problems in the background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A new energy vehicle aluminum alloy frame forming process includes the following steps:

[0007] Step 1: After homogenizing the aluminum alloy ingot, place the aluminum alloy ingot in the extrusion die of the extrusion equipment, quench while hot after extrusion molding, so that the temperature of the quenched aluminum alloy profile is ≤80°C, and obtain aluminum alloy profiles of different specifications.

[0008] The specific settings for extrusion molding are: the heating temperature of the extrusion die is 500-520°C, the die mouth temperature is 480-490°C, and the extrusion speed is 2.5-3 mm / s.

[0009] Different types of aluminum alloy profiles include a lower base plate, a first frame plate, a second frame plate, a first connecting piece, a second connecting piece, a reinforcing piece and a connecting plate.

[0010] The aluminum alloy ingot used is of type 6061-T6 but is not limited to 6061-T6.

[0011] Step 2: Place aluminum alloy profiles of different specifications in a heating furnace, keep them at 160-170℃ for 7.5-8.5h, and naturally cool them to room temperature to complete the thermal aging treatment.

[0012] Step 3: Scald the aluminum alloy profile after heat aging treatment with 90-95℃ clean water for 2-3 times, then blow dry with air knife, immerse the aluminum alloy profile in degreasing cleaning agent for ultrasonic cleaning for 15-20 minutes, wash with clean water 1-2 times, then immerse in alkaline etching agent for ultrasonic cleaning for 5-10 minutes, wash with clean water 2-3 times and blow dry with air knife to complete the pretreatment of aluminum alloy profile.

[0013] Step 4: Immerse the pretreated aluminum alloy profile in the electrolyte, use the aluminum alloy profile as the anode, anodize for 15-20 minutes at a voltage of 10-12V, wash with clean water 2-3 times, and blow dry with an air knife to complete the anodizing treatment of the aluminum alloy profile.

[0014] The electrolyte comprises a sulfuric acid solution with a mass fraction of 15%, salicylic acid and isopentyl glycol, and the usage ratio of the sulfuric acid solution, salicylic acid and isopentyl glycol is 100 mL: 2.5-3 g: 0.1-0.2 g.

[0015] Step 5: Add fluorine-modified graphite to the epoxy resin, stir at 1200-1500 r / min for 20-30 minutes, then add a curing agent and continue stirring under the same conditions for 2-3 minutes to obtain an epoxy adhesive; after impregnating the carbon fiber cloth with the epoxy adhesive, press 8-12 layers of carbon fiber cloth with a mold to obtain a carbon fiber corrugated board.

[0016] The usage ratio of epoxy resin, fluorine-containing modified graphite and curing agent is 20g:10-15g:0.1g.

[0017] The curing agent is one of triethylenetetramine and tetraethylenepentamine.

[0018] Step six: Use epoxy adhesive to glue a carbon fiber corrugated plate to every two connecting plates to obtain an energy-absorbing baffle; weld the first frame plate and the second frame plate to obtain a panel, weld the panel and the lower base plate, and then weld the first connecting piece to the lower edge of the first frame plate, weld a pair of second connecting pieces to the lower edge of the second frame plate, weld the reinforcement at a right angle between the first frame plate and the first connecting piece, and finally weld the energy-absorbing baffle inside the panel, and weld the two ends of the energy-absorbing baffle to the corresponding first frame plates respectively, and weld the energy-absorbing baffle to the lower base plate near the edge of the lower base plate; after grinding the weld to make it regular, an aluminum alloy frame is obtained, and the forming process of the aluminum alloy frame for new energy vehicles is completed.

[0019] Furthermore, the angle of the carbon fiber corrugated plate is A, 50°≤A≤60°.

[0020] Furthermore, fluorine-modified graphite is prepared by the following steps:

[0021] Step S1: dispersing the layered graphite in a Tris-HCl aqueous solution with a molar concentration of 10 mmol / L, and then ultrasonically dispersing it in an ice bath for 20-30 minutes. Then, adding dopamine hydrochloride and continuing ultrasonically dispersing it for 10-15 minutes. Then, raising the temperature to 25-30° C. and keeping it warm for 20-24 hours to allow the dopamine hydrochloride to polymerize and coat the layered graphite. Centrifuging, washing the precipitate with anhydrous ethanol for 3-5 times, and vacuum drying at 60° C. to obtain modified graphite.

[0022] Step S2: ultrasonically disperse the modified graphite with anhydrous ethanol, then add 4-(trifluoromethyl)benzylamine, continue ultrasonic dispersion for 10-15 minutes, then stir at 25-30° C. and 1000-1500 r / min for 20-24 hours, centrifuge, wash the precipitate with anhydrous ethanol 2-3 times, and vacuum dry at 60° C. to obtain fluorine-containing modified graphite.

[0023] Furthermore, the ratio of the layered graphite, the Tris-HCl aqueous solution and the dopamine hydrochloride is 5 g:100 mL:0.5-1 g.

[0024] Furthermore, the usage ratio of the modified graphite and 4-(trifluoromethyl)benzylamine is 40 g:1 g.

[0025] Beneficial effects of the present invention:

[0026] The present invention's aluminum alloy frame forming process for new energy vehicles first prepares aluminum alloy profiles of varying specifications from aluminum alloy ingots. Compared to integral press forming, this process requires less equipment and facilitates practical production. Parameter optimization during the processing of the aluminum alloy profiles helps enhance their mechanical properties.

[0027] The present invention coats layered graphite through dopamine self-polymerization, which helps to increase the dispersion performance of fluorine-modified graphite in epoxy resin and the impact strength of epoxy adhesive. After reactive grafting with 4-(trifluoromethyl)benzylamine, the heat resistance and thermal conductivity of fluorine-modified graphite can be increased. The prepared carbon fiber corrugated plate has better mechanical strength. After being compounded with a connecting plate to prepare an energy-absorbing partition, it not only plays a good barrier role between battery packs, but the carbon fiber corrugated plate is bonded to the connecting plate through the epoxy adhesive. Compared with hollow aluminum alloy profiles, it has a larger heat dissipation area and better thermal conductivity. It is also beneficial to ensure good heat dissipation performance of the lithium battery pack and provide a good buffering effect when the aluminum alloy frame is impacted. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic structural diagram of the aluminum alloy frame for new energy vehicles of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the carbon fiber corrugated plate of the present invention.

[0031] In the figure: 1, lower base plate; 2, first frame plate; 3, second frame plate; 4, first connecting member; 5, second connecting member; 6, reinforcement member; 7, connecting plate. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] Example 1

[0034] This embodiment provides a fluorine-containing modified graphite, comprising the following implementation steps:

[0035] Step S1: 5 kg of layered graphite is dispersed in 100 L of a Tris-HCl aqueous solution with a molar concentration of 10 mmol / L, and then ultrasonically dispersed in an ice bath for 20 minutes. Then, 0.5 kg of dopamine hydrochloride is added and ultrasonically dispersed for 10 minutes. Then, the temperature is raised to 25°C and kept warm for 20 hours to allow the dopamine hydrochloride to polymerize and coat the layered graphite. The mixture is centrifuged, and the precipitate is washed three times with anhydrous ethanol and vacuum-dried at 60°C to obtain modified graphite.

[0036] Step S2: 4 kg of modified graphite was ultrasonically dispersed with anhydrous ethanol, and then 100 g of 4-(trifluoromethyl)benzylamine was added, and ultrasonic dispersion was continued for 10 min. Then, stirring was carried out at 25° C. and 1000 r / min for 20 h, and centrifugation was carried out. The precipitate was washed twice with anhydrous ethanol and vacuum dried at 60° C. to obtain fluorine-containing modified graphite.

[0037] Example 2

[0038] This embodiment provides a fluorine-containing modified graphite, comprising the following implementation steps:

[0039] Step S1: 5 kg of layered graphite was dispersed in 100 L of a Tris-HCl aqueous solution with a molar concentration of 10 mmol / L, and then ultrasonically dispersed for 25 min in an ice bath. Then, 0.8 kg of dopamine hydrochloride was added and ultrasonically dispersed for 12 min. The temperature was then raised to 28° C. and kept warm for 22 h to allow the dopamine hydrochloride to polymerize and coat the layered graphite. The mixture was centrifuged, and the precipitate was washed four times with anhydrous ethanol and vacuum-dried at 60° C. to obtain modified graphite.

[0040] Step S2: 4 kg of modified graphite was ultrasonically dispersed with anhydrous ethanol, and then 100 g of 4-(trifluoromethyl)benzylamine was added, and ultrasonic dispersion was continued for 12 min. Then, stirring was carried out at 28 ° C and 1200 r / min for 22 h, and centrifugation was carried out. The precipitate was washed twice with anhydrous ethanol and vacuum dried at 60 ° C to obtain fluorine-containing modified graphite.

[0041] Example 3

[0042] This embodiment provides a fluorine-containing modified graphite, comprising the following implementation steps:

[0043] Step S1: 5 kg of layered graphite is dispersed in 100 L of a Tris-HCl aqueous solution with a molar concentration of 10 mmol / L, and then ultrasonically dispersed in an ice bath for 30 minutes. Then, 1 kg of dopamine hydrochloride is added and ultrasonically dispersed for 15 minutes. Then, the temperature is raised to 30°C and kept warm for 24 hours to allow the dopamine hydrochloride to polymerize and coat the layered graphite. The mixture is centrifuged, and the precipitate is washed 5 times with anhydrous ethanol and vacuum-dried at 60°C to obtain modified graphite.

[0044] Step S2: 4 kg of modified graphite was ultrasonically dispersed with anhydrous ethanol, and then 100 g of 4-(trifluoromethyl)benzylamine was added, and ultrasonic dispersion was continued for 15 min. Then, stirring was carried out at 30° C. and 1500 r / min for 24 h, and centrifugation was carried out. The precipitate was washed three times with anhydrous ethanol and vacuum dried at 60° C. to obtain fluorine-containing modified graphite.

[0045] Example 4

[0046] See also Figure 1-Figure 2 This embodiment provides an aluminum alloy frame for a new energy vehicle, comprising the following implementation steps:

[0047] Step 1: After homogenizing the 6061-T6 aluminum alloy ingot at 490±5℃ for 8±0.5h, the 6061-T6 aluminum alloy ingot is placed in the extrusion die of the extrusion equipment. After extrusion molding, it is quenched while hot to make the temperature of the quenched aluminum alloy profile ≤80℃, and aluminum alloy profiles of different specifications are obtained; the specific settings for extrusion molding are: the heating temperature of the extrusion die is 500℃, the die mouth temperature is 480℃, and the extrusion speed is 2.5mm / s.

[0048] The aluminum alloy profiles of different models include a lower base plate 1 , a first frame plate 2 , a second frame plate 3 , a first connecting member 4 , a second connecting member 5 , a reinforcing member 6 and a connecting plate 7 .

[0049] Step 2: Place aluminum alloy profiles of different specifications in a heating furnace, keep them at 160°C for 7.5 hours, and naturally cool them to room temperature to complete the thermal aging treatment.

[0050] Step 3: After heat aging treatment, the aluminum alloy profile is scalded twice with clean water at 90°C, and then blown dry with an air knife. The aluminum alloy profile is immersed in a degreasing cleaning agent for ultrasonic cleaning for 15 minutes, washed once with clean water, and then immersed in an alkaline etching agent for ultrasonic cleaning for 5 minutes. After washing twice with clean water, it is blown dry with an air knife to complete the pretreatment of the aluminum alloy profile.

[0051] Step 4: Immerse the pretreated aluminum alloy profile in the electrolyte, use the aluminum alloy profile as the anode, anodize for 15 minutes at a voltage of 10V, wash with clean water twice, and blow dry with an air knife to complete the anodizing treatment of the aluminum alloy profile; the electrolyte includes a 15% mass fraction of sulfuric acid solution, salicylic acid and isopentyl glycol, and the usage ratio of sulfuric acid solution, salicylic acid and isopentyl glycol is 100mL:2.5g:0.1g.

[0052] Step 5: Add 2 kg of fluorine-modified graphite in Example 1 to 4 kg of epoxy resin, stir at 1200 r / min for 20 min, then add 20 g of triethylenetetramine and continue stirring under the same conditions for 2 min to obtain an epoxy adhesive; after impregnating the carbon fiber cloth with the epoxy adhesive, 8 layers of carbon fiber cloth are pressed together with a mold to obtain a carbon fiber corrugated plate; the angle A of the carbon fiber corrugated plate is 50°.

[0053] Step six: Use epoxy adhesive to glue a carbon fiber corrugated plate to every two connecting plates 7 to obtain an energy-absorbing baffle; weld the first frame plate 2 and the second frame plate 3 to obtain a panel, weld the panel and the lower base plate 1, and then weld the first connecting plate 7 to the lower edge of the first frame plate 2, weld a pair of second connecting plates 7 to the lower edge of the second frame plate 3, weld the reinforcement 6 at the right angles between the first frame plate 2 and the first connecting plate 7, and finally weld the energy-absorbing baffle inside the panel, and the two ends of the energy-absorbing baffle are respectively welded to the corresponding first frame plates 2, and the edge of the energy-absorbing baffle close to the lower base plate 1 is welded to the lower base plate 1; after grinding the weld to make it regular, an aluminum alloy frame is obtained, and the forming process of the aluminum alloy frame for new energy vehicles is completed.

[0054] Example 5

[0055] See also Figure 1-Figure 2 This embodiment provides an aluminum alloy frame for a new energy vehicle, comprising the following implementation steps:

[0056] Step 1: After homogenizing the 6061-T6 aluminum alloy ingot at 490±5℃ for 8±0.5h, the 6061-T6 aluminum alloy ingot is placed in the extrusion die of the extrusion equipment. After extrusion molding, it is quenched while hot to make the temperature of the quenched aluminum alloy profile ≤80℃, and aluminum alloy profiles of different specifications are obtained; the specific settings for extrusion molding are: the heating temperature of the extrusion die is 510℃, the die mouth temperature is 485℃, and the extrusion speed is 2.8mm / s.

[0057] The aluminum alloy profiles of different models include a lower base plate 1 , a first frame plate 2 , a second frame plate 3 , a first connecting member 4 , a second connecting member 5 , a reinforcing member 6 and a connecting plate 7 .

[0058] Step 2: Place aluminum alloy profiles of different specifications in a heating furnace, keep them at 165°C for 8 hours, and naturally cool them to room temperature to complete the thermal aging treatment.

[0059] Step 3: After heat aging treatment, the aluminum alloy profile is scalded twice with clean water at 92°C, and then blown dry with an air knife. The aluminum alloy profile is immersed in a degreasing cleaning agent for ultrasonic cleaning for 18 minutes, washed once with clean water, and then immersed in an alkaline etching agent for ultrasonic cleaning for 8 minutes. After washing twice with clean water, it is blown dry with an air knife to complete the pretreatment of the aluminum alloy profile.

[0060] Step 4: Immerse the pretreated aluminum alloy profile in the electrolyte, use the aluminum alloy profile as the anode, anodize for 18 minutes at a voltage of 11V, wash with clean water twice, and blow dry with an air knife to complete the anodizing treatment of the aluminum alloy profile; the electrolyte includes a 15% mass fraction of sulfuric acid solution, salicylic acid and isopentyl glycol, and the usage ratio of sulfuric acid solution, salicylic acid and isopentyl glycol is 100mL:2.8g:0.15g.

[0061] Step 5: Add 2.5 kg of the fluorine-modified graphite in Example 2 to 4 kg of epoxy resin, stir at 1350 r / min for 25 min, then add 20 g of tetraethylene pentamine and continue stirring under the same conditions for 2.5 min to obtain an epoxy adhesive; after impregnating the carbon fiber cloth with the epoxy adhesive, 10 layers of carbon fiber cloth are pressed together with a mold to obtain a carbon fiber corrugated plate; the angle A of the carbon fiber corrugated plate is 55°.

[0062] Step six: Use epoxy adhesive to glue a carbon fiber corrugated plate to every two connecting plates 7 to obtain an energy-absorbing baffle; weld the first frame plate 2 and the second frame plate 3 to obtain a panel, weld the panel and the lower base plate 1, and then weld the first connecting plate 7 to the lower edge of the first frame plate 2, weld a pair of second connecting plates 7 to the lower edge of the second frame plate 3, weld the reinforcement 6 at the right angles between the first frame plate 2 and the first connecting plate 7, and finally weld the energy-absorbing baffle inside the panel, and the two ends of the energy-absorbing baffle are respectively welded to the corresponding first frame plates 2, and the edge of the energy-absorbing baffle close to the lower base plate 1 is welded to the lower base plate 1; after grinding the weld to make it regular, an aluminum alloy frame is obtained, and the forming process of the aluminum alloy frame for new energy vehicles is completed.

[0063] Example 6

[0064] See also Figure 1-Figure 2 This embodiment provides an aluminum alloy frame for a new energy vehicle, comprising the following implementation steps:

[0065] Step 1: After homogenizing the 6061-T6 aluminum alloy ingot at 490±5℃ for 8±0.5h, the 6061-T6 aluminum alloy ingot is placed in the extrusion die of the extrusion equipment. After extrusion molding, it is quenched while hot to make the temperature of the quenched aluminum alloy profile ≤80℃, and aluminum alloy profiles of different specifications are obtained; the specific settings for extrusion molding are: the heating temperature of the extrusion die is 520℃, the die mouth temperature is 490℃, and the extrusion speed is 3mm / s.

[0066] The aluminum alloy profiles of different models include a lower base plate 1 , a first frame plate 2 , a second frame plate 3 , a first connecting member 4 , a second connecting member 5 , a reinforcing member 6 and a connecting plate 7 .

[0067] Step 2: Place aluminum alloy profiles of different specifications in a heating furnace, keep them at 170°C for 8.5 hours, and naturally cool them to room temperature to complete the thermal aging treatment.

[0068] Step 3: After heat aging treatment, the aluminum alloy profile is scalded with 95°C clean water for 3 times, then blown dry with an air knife, the aluminum alloy profile is immersed in a degreasing cleaning agent for ultrasonic cleaning for 20 minutes, washed with clean water twice, and then immersed in an alkaline etching agent for ultrasonic cleaning for 10 minutes, washed with clean water 3 times, and blown dry with an air knife to complete the pretreatment of the aluminum alloy profile.

[0069] Step 4: Immerse the pretreated aluminum alloy profile in the electrolyte, use the aluminum alloy profile as the anode, anodize for 20 minutes at a voltage of 12V, wash with clean water 3 times, and blow dry with an air knife to complete the anodizing treatment of the aluminum alloy profile; the electrolyte includes a 15% mass fraction of sulfuric acid solution, salicylic acid and isopentyl glycol, and the usage ratio of sulfuric acid solution, salicylic acid and isopentyl glycol is 100mL:3g:0.2g.

[0070] Step 5: Add 3 kg of fluorine-modified graphite in Example 3 to 4 kg of epoxy resin, stir at 1500 r / min for 30 min, then add 20 g of tetraethylene pentamine and continue stirring under the same conditions for 3 min to obtain an epoxy adhesive; after impregnating the carbon fiber cloth with the epoxy adhesive, press 12 layers of carbon fiber cloth with a mold to obtain a carbon fiber corrugated plate; the angle A of the carbon fiber corrugated plate is 60°.

[0071] Step 6: Use epoxy adhesive to glue a carbon fiber corrugated plate to every two connecting plates 7 to obtain an energy-absorbing baffle; weld the first frame plate 2 and the second frame plate 3 to obtain a panel, weld the panel to the lower base plate 1, and then weld the first connecting plate 7 to the lower edge of the first frame plate 2, weld a pair of second connecting plates 7 to the lower edge of the second frame plate 3, weld a reinforcement 6 at a right angle between the first frame plate 2 and the first connecting plate 7, and finally weld the energy-absorbing baffle inside the panel. The two ends of the energy-absorbing baffle are respectively welded to the corresponding first frame plates 2, and the edge of the energy-absorbing baffle close to the lower base plate 1 is welded to the lower base plate 1; after the weld is polished and regularized, an aluminum alloy frame is obtained, completing the forming process of the aluminum alloy frame for new energy vehicles. Among them, the first connecting plate 7 and the second connecting plate 7 are provided with connection holes for connecting to the new energy vehicle body, and the performance baffle plays a role of blocking and buffering.

[0072] In the embodiment, the degreasing cleaning agent is a Kaimei brand environmentally friendly solvent cleaning agent purchased from Suzhou Haige Chemical Co., Ltd.; the alkaline etching agent is HWJ-207 alkaline etching agent purchased from Dongguan Huiweijia Metal Technology Co., Ltd.; the epoxy resin is Japan Shin-Etsu ES-1001N silicone epoxy resin; and the carbon fiber cloth is purchased from Shanghai Lishuo Composite Materials Technology Co., Ltd., model T300-3K-P200.

[0073] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0074] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A new energy vehicle aluminum alloy frame forming process, characterized in that: The steps include: Step 1: After homogenization treatment, the aluminum alloy ingot is extruded and quenched while hot to obtain aluminum alloy profiles of different specifications; Step 2: performing heat aging treatment, pretreatment and anodizing treatment on aluminum alloy profiles of different specifications in sequence; the aluminum alloy profiles include a lower base plate (1), a first frame plate (2), a second frame plate (3), a first connecting member (4), a second connecting member (5), a reinforcing member (6) and a connecting plate (7); Step 3: Stirring the epoxy resin and fluorine-modified graphite at 1200-1500 rpm for 20-30 minutes, adding a curing agent and continuing to stir for 2-3 minutes to obtain an epoxy adhesive; impregnating the carbon fiber cloth with the epoxy adhesive, and pressing 8-12 layers of carbon fiber cloth together to obtain a carbon fiber corrugated sheet; Step 4: Use epoxy adhesive to bond a carbon fiber corrugated plate to every two connecting plates (7) to obtain an energy-absorbing baffle; weld the first frame plate (2), the second frame plate (3), the lower base plate (1), the first connecting member (4), the second connecting member (5), the reinforcement member (6) and the energy-absorbing baffle in sequence, and polish the welds to complete the forming process of the aluminum alloy frame for new energy vehicles; The usage ratio of the epoxy resin, fluorine-modified graphite and curing agent is 20g:10-15g:0.1g; The angle of the carbon fiber corrugated plate is A, 50°≤A≤60°; The fluorine-containing modified graphite is prepared by the following steps: Step S1: dispersing the layered graphite in a Tris-HCl aqueous solution under ice bath conditions and ultrasonically dispersing for 20-30 minutes, then adding dopamine hydrochloride and continuing ultrasonically dispersing for 10-15 minutes, raising the temperature to 25-30° C. and keeping the temperature for 20-24 hours, centrifuging, washing the precipitate with anhydrous ethanol 3-5 times, and vacuum drying at 60° C. to obtain modified graphite; Step S2: ultrasonically disperse the modified graphite with anhydrous ethanol, then add 4-(trifluoromethyl)benzylamine and continue ultrasonically dispersing for 10-15 minutes. Stir at 25-30°C and 1000-1500 r / min for 20-24 hours, centrifuge, wash the precipitate with anhydrous ethanol 2-3 times, and vacuum dry at 60°C to obtain fluorine-containing modified graphite.

2. A new energy vehicle aluminum alloy frame forming process according to claim 1, characterized in that: The specific settings of the extrusion molding are: the heating temperature of the extrusion die is 500-520° C., the die mouth temperature is 480-490° C., and the extrusion speed is 2.5-3 mm / s.

3. The aluminum alloy frame forming process for new energy vehicles according to claim 1, characterized in that: The specific method of the pretreatment is: the aluminum alloy profile after heat aging treatment is scalded and dried, then immersed in a degreasing cleaning agent for ultrasonic cleaning for 15-20 minutes, washed with clean water, then immersed in an alkaline etching agent for ultrasonic cleaning for 5-10 minutes, washed with clean water and dried to complete the pretreatment of the aluminum alloy profile.

4. The aluminum alloy frame forming process for new energy vehicles according to claim 1, characterized in that: The specific method of the anodizing treatment is: immersing the pretreated aluminum alloy profile in an electrolyte, anodizing at a voltage of 10-12V for 15-20 minutes, washing with clean water and drying to complete the anodizing treatment of the aluminum alloy profile.

5. A new energy vehicle aluminum alloy frame forming process according to claim 4, characterized in that: The electrolyte comprises a 15% by mass sulfuric acid solution, salicylic acid and isopentyl glycol, and the usage ratio of the sulfuric acid solution, salicylic acid and isopentyl glycol is 100 mL: 2.5-3 g: 0.1-0.2 g.

6. The aluminum alloy frame forming process for new energy vehicles according to claim 1, characterized in that: The usage ratio of the layered graphite, the Tris-HCl aqueous solution and dopamine hydrochloride is 5g:100mL:0.5-1g.

7. The forming process of an aluminum alloy frame for new energy vehicles according to claim 1, characterized in that: The usage ratio of the modified graphite and 4-(trifluoromethyl)benzylamine is 40g:1g.

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