A punching device, battery cell shell processing equipment and battery cell shell processing method

Abstract

The present invention discloses a blanking device, including a blanking device body, the blanking device body including: a lower blanking piece and an upper blanking piece, the bottom surface of the upper blanking piece being parallel to the top surface of the lower blanking piece; a guide member disposed between the upper blanking piece and the lower blanking piece, the length direction of the guide member being perpendicular to the lower blanking piece and the upper blanking piece; and the upper blanking piece or the lower blanking piece being movable along the length direction of the guide member, and when the bottom surface of the upper blanking piece and the top surface of the lower blanking piece approach coplanarity along the length direction of the guide member until they intersect, the bottom edge of the upper blanking piece and the top edge of the lower blanking piece form a shearing structure. The present invention connects the upper blanking piece and the lower blanking piece through the guide member, so that the bottom edge of the upper blanking piece and the top edge of the lower blanking piece form a shearing structure for shearing aluminum alloy plates, and the upper blanking piece and the lower blanking piece do not move relative to each other laterally during the shearing process, thereby ensuring the edge quality of the sheared aluminum alloy circular plate and improving the surface quality of the finished product.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell production, and in particular to a punching device, battery cell shell processing equipment and a battery cell shell processing method. Background Art

[0002] The battery units of new energy vehicles mostly use lithium-ion batteries, which are composed of multiple battery cells. The components of the battery cells mainly include: positive electrode, negative electrode, diaphragm, electrolyte and shell. The battery cell shell is an important component for protecting the battery cell. It not only provides physical protection for the battery cell to prevent damage to the battery cell caused by external impact and environmental factors, but also ensures the safe operation of the battery cell under various conditions. Therefore, the sealing performance and surface quality requirements of the shell are relatively high.

[0003] In the existing new energy cylindrical battery cell production line, the aluminum alloy used to prepare the battery cell shell is prone to burrs on its edges and irregular shapes during punching, resulting in defective aluminum alloy circular plates obtained by subsequent drawing and punching. Secondly, the subsequent processing efficiency of the aluminum alloy circular plates obtained by punching is low and not fully automated, which makes the aluminum alloy circular plates prone to surface quality problems in the subsequent processing process, further increasing the defect rate. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a punching device, a battery cell shell processing equipment and a battery cell shell processing method. The specific technical solutions are as follows:

[0005] A blanking device includes a blanking device body, which includes: a lower cutting piece and an upper cutting piece with parallel relative surfaces; a guide piece arranged between the upper cutting piece and the lower cutting piece, and the length direction of the guide piece is perpendicular to the lower cutting piece and the upper cutting piece; the upper cutting piece or the lower cutting piece can be moved along the length direction of the guide piece, and when the bottom surface of the upper cutting piece and the top surface of the lower cutting piece approach the coplanarity along the length direction of the guide piece until they are staggered, the bottom edge of the upper cutting piece and the top edge of the lower cutting piece form a shear structure.

[0006] Furthermore, the upper cutting piece is formed with an upper through hole, and the bottom surface of the upper cutting piece intersects with the upper through hole to form an inner hole diameter edge of the bottom surface, and the inner hole diameter edge of the bottom surface is a type of bottom surface edge. The top surface of the lower cutting piece intersects with the side surface of the lower cutting piece to form an outer circular edge of the top surface, and the outer circular edge of the top surface is a type of top surface edge. The diameter of the inner hole diameter edge of the bottom surface is equal to the diameter of the outer circular edge of the top surface. When the bottom surface of the upper cutting piece approaches along the length direction of the guide piece until it intersects with the top surface of the lower cutting piece, the inner hole diameter edge of the bottom surface and the outer circular edge of the top surface form a shear structure.

[0007] Furthermore, the punching device body also includes: a punching part, the axis of which coincides with the axis of the lower cutting part, the punching part includes a punching shaft that coincides with the axis of the lower cutting part, the diameter of the punching shaft is larger than the diameter of the upper through hole, and the punching shaft can push the upper cutting part to move along the length direction of the guide part to form a shearing structure.

[0008] Furthermore, a bent through hole is formed inside the lower piece, the axis of the bent through hole coincides with the axis of the lower piece, the inner diameter of the bent through hole is smaller than the diameter of the upper through hole, and the bent through hole is a through hole.

[0009] Furthermore, the stamping part also includes: a sliding shaft arranged inside the stamping shaft, the sliding shaft has the same axis as the stamping shaft, the sliding shaft is slidably connected to the stamping shaft, and the distance between the bottom end face of the sliding shaft and the bottom end face of the stamping shaft is greater than the thickness of the upper cut piece, the diameter of the sliding shaft is smaller than the diameter of the upper through hole, and the diameter of the sliding shaft is greater than the inner hole diameter of the bent through hole.

[0010] Furthermore, the stamping part also includes: a bending shaft arranged inside the sliding shaft, the bending shaft is fixedly connected to the stamping shaft, the bending shaft is slidably connected to the sliding shaft, the diameter of the bending shaft is equal to the inner hole diameter of the bending through hole, the bending shaft and the stamping shaft are coaxial, and the distance between the bottom end face of the bending shaft and the bottom end face of the stamping shaft is greater than the thickness of the upper cut piece.

[0011] Furthermore, when the bottom end face of the sliding shaft coincides with the end face of the bending through hole, the outer surface of the bending shaft coincides with the inner surface of the bending through hole. When the punching shaft drives the bending shaft downward, the sliding shaft moves upward relative to the bending shaft.

[0012] A battery cell shell processing device comprises a blanking device body, a punching device, a cleaning device and a riveting device.

[0013] The processing method comprises the following steps:

[0014] S1: The blanking device body blanks and preliminarily bends the aluminum alloy sheet to obtain a first shell;

[0015] S2: The punching device draws and stretches the side length of the first shell multiple times to obtain a second shell with dimensions that meet production requirements;

[0016] S3: The cleaning device performs hydrocarbon cleaning on the second shell to obtain a third shell;

[0017] S4: The open end of the third shell faces the riveting end of the riveting device, which rivets and presses the other parts of the battery cell shell and the third shell to form a product battery cell shell.

[0018] It can be seen from the above technical solution that the present invention has the following beneficial effects:

[0019] The present invention connects the upper cutting piece and the lower cutting piece through a guide piece, so that the bottom edge of the upper cutting piece and the top edge of the lower cutting piece form a shearing structure for shearing the aluminum alloy plate, and the upper cutting piece and the lower cutting piece will not move laterally relative to each other during the shearing process, thereby ensuring the edge quality of the sheared aluminum alloy circular plate; secondly, the aluminum alloy shell is gradually drawn, shaped, punched and sheared by a reciprocating conveyor to finally obtain a finished aluminum alloy battery cell shell, wherein the drawing of the aluminum alloy shell is divided into multiple steps of drawing, so that its surface will not have defects such as cracks and scratches during the drawing process, thereby improving the surface quality of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of embodiment 1 of the present invention;

[0021] Figure 2 for Figure 1 sectional view of

[0022] Figure 3 This is a schematic diagram of embodiment 2 of the present invention.

[0023] In the figure: 1. Punching device body; 2. Punching device; 3. Cleaning device; 4. Riveting device; 11. Upper cutting piece; 111. Upper through hole; 12. Lower cutting piece; 121. Bending through hole; 14. Guide member; 15. Punching member; 151. Punching shaft; 152. Sliding shaft; 153. Bending shaft; DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 creative efforts are within the scope of protection of the present invention.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the finished product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] Example 1

[0027] like Figure 1As shown, embodiment 1 includes a blanking device body 1, which includes: a lower cutting piece 12 and an upper cutting piece 11, the bottom surface of the upper cutting piece 11 is parallel to the top surface of the lower cutting piece 12; a guide piece 14 is arranged between the upper cutting piece 11 and the lower cutting piece 12, the length direction of the guide piece 14 is perpendicular to the lower cutting piece 12 and the upper cutting piece 11; and the upper cutting piece 11 or the lower cutting piece 12 can move along the length direction of the guide piece 14, when the bottom surface of the upper cutting piece 11 and the top surface of the lower cutting piece 12 are close to the same plane along the length direction of the guide piece 14 until they are staggered, the bottom edge of the upper cutting piece 11 and the top edge of the lower cutting piece 12 form a shear structure.

[0028] Specifically, the lower cutting piece 12 is arranged directly below the upper cutting piece 11 and coincides with its axis. The upper cutting piece 11 or the lower cutting piece 12 is slidably connected to the side of the guide piece 14, so that when the upper cutting piece 11 and the lower cutting piece 12 are relatively close, the relative positions of the two relative to the axis will not change, so that when the bottom edge of the upper cutting piece 11 gradually approaches the top edge of the lower cutting piece 12, the projections of the bottom edge and the top edge on the bottom surface of the lower cutting piece 12 always coincide, so that the bottom edge and the top edge coincide until they are staggered. The shearing mechanism formed by the two can apply a shear force with the same lever arm to the aluminum alloy plate placed between the bottom surface of the upper cutting piece 11 and the top surface of the lower cutting piece 12, so that the edge of the sheared aluminum alloy circular plate is smooth and free of burrs, thereby improving the shape regularity of the subsequent shell.

[0029] Embodiment 1 of the blanking device is as follows: an upper through hole 111 is formed on the upper cutting piece 11, and the bottom surface of the upper cutting piece 11 intersects with the upper through hole 111 to form an inner hole diameter edge of the bottom surface, and the inner hole diameter edge of the bottom surface is a type of bottom surface edge; the top surface of the lower cutting piece 12 intersects with the side surface of the lower cutting piece 12 to form an outer circular edge of the top surface, and the outer circular edge of the top surface is a type of top surface edge; the diameter of the inner hole diameter edge of the bottom surface is equal to the diameter of the outer circular edge of the top surface; when the bottom surface of the upper cutting piece 11 approaches along the length direction of the guide piece 14 until it intersects with the top surface of the lower cutting piece 12, the inner hole diameter edge of the bottom surface and the outer circular edge of the top surface form a shear structure.

[0030] Specifically, the side surface of the lower cutting piece 12 is cylindrical, and the axis of the upper through hole 111 coincides with the axis of the lower cutting piece 12, so that when the upper cutting piece 11 slides along the guide piece 14 close to the lower cutting piece 12, the projections of the inner hole diameter edge of the bottom surface and the outer circle edge of the top surface on the bottom surface of the lower cutting piece 12 always coincide, so that the shearing structure formed by the two can neatly shear the edge of the aluminum alloy plate, and the sheared aluminum alloy circular plate falls on the top surface of the lower cutting piece 12, and the edge of the aluminum alloy circular plate coincides with the outer circle edge of the top surface of the lower cutting piece 12, which is convenient for subsequent processing of the aluminum alloy circular plate.

[0031] The second embodiment of the punching device is as follows: a downwardly protruding circular ring is formed on the bottom surface of the upper cutting piece 11, and the side surface of the circular ring intersects with the bottom surface to form an outer circular edge of the bottom surface, which is also a type of bottom surface edge; a lower through hole is formed on the top surface of the lower cutting piece 12, and the edge of the lower through hole intersects with the top surface of the lower cutting piece 12 to form an inner hole diameter edge of the top surface, which is also a type of top surface edge; the axes of the circular ring and the lower through hole coincide, and the diameter of the lower through hole is the same as the outer diameter of the circular ring, so that when the bottom of the stamping piece 15 contacts the top surface of the upper cutting piece 11 and is gradually pressed downward, the outer circular edge of the bottom surface and the inner hole diameter edge of the top surface form a shearing mechanism.

[0032] Furthermore, the punching device body 1 also includes: a punching part 15, the axis of the punching part 15 coincides with the axis of the lower cutting part 12, the punching part 15 includes a punching shaft 151 that coincides with the axis of the lower cutting part 12, the diameter of the punching shaft 151 is larger than the diameter of the upper through hole 111, and the punching shaft 151 can push the upper cutting part 11 to move along the length direction of the guide part 14 to form a shearing structure.

[0033] Specifically, the bottom of the punching shaft 151 is arranged above the upper cutting piece 11. When the bottom of the punching shaft 151 contacts the top surface of the upper cutting piece 11 and slides it along the guide piece 14, the inner circular edge of the bottom surface gradually approaches the outer circular edge of the top surface until the bottom of the punching shaft 151 contacts the top surface of the upper cutting piece 11. The inner circular edge of the bottom surface and the outer circular edge of the top surface can be staggered up and down to form a shear structure. The punching shaft 151 continues to push the upper cutting piece 11 to slide, so that the shear structure can shear the aluminum alloy plate into an aluminum alloy circular plate.

[0034] like Figure 2 As shown, a bent through hole 121 is formed inside the lower piece 12 , the axis of the bent through hole 121 coincides with the axis of the lower piece 12 , the inner diameter of the bent through hole 121 is smaller than the diameter of the upper through hole 111 , and the bent through hole 121 is a through hole.

[0035] Specifically, the diameter of the aluminum alloy circular plate is larger than the inner diameter of the bending through hole 121, so that the aluminum alloy circular plate is placed on the top surface of the lower cutting piece 12, and the axis of the bending through hole 121 passes through the center of the aluminum alloy circular plate, so that the edge of the aluminum alloy circular plate and the bending through hole 121 are concentric circles, and thus the aluminum alloy circular plate is placed in the cavity formed by the top surface of the lower cutting piece 12 and the inner surface of the upper through hole 111, and the bending through hole 121 is passed through below its central area.

[0036] Furthermore, the stamping part 15 also includes: a sliding shaft 152 arranged inside the stamping shaft 151, the sliding shaft 152 has the same axis as the stamping shaft 151, the sliding shaft 152 is slidingly connected to the stamping shaft 151, and the distance between the bottom end face of the sliding shaft 152 and the bottom end face of the stamping shaft 151 is greater than the thickness of the upper cutting piece 11, the diameter of the sliding shaft 152 is smaller than the diameter of the upper through hole 111, and the diameter of the sliding shaft 152 is greater than the inner hole diameter of the bending through hole 121.

[0037] Specifically, the sliding shaft 152 is a hollow cylinder, the outer surface of which slides relative to the inner surface of the stamping shaft 151, and it forms a limiting structure for limiting its own sliding stroke. In this embodiment, the limiting structure is limited by bolts and upper protrusions, so that the sliding of the sliding shaft 152 relative to the stamping shaft 151 has an extreme position; secondly, when the bottom of the stamping shaft 151 contacts the top of the upper cutting piece 11, the sliding shaft 152 moves upward relative to the stamping shaft 151. At this time, the sliding shaft 152 passes through the upper through hole 111, and its bottom end face contacts the top surface of the lower cutting piece 12, so that the bottom end face of the sliding shaft 152 can fix the aluminum alloy circular plate on the top surface of the lower cutting piece 12, thereby preventing the position of the aluminum alloy circular plate relative to the bending through hole 121 from changing.

[0038] Furthermore, the stamping part 15 also includes: a bending shaft 153 arranged inside the sliding shaft 152, the bending shaft 153 is fixedly connected to the stamping shaft 151, the bending shaft 153 is slidably connected to the sliding shaft 152, the diameter of the bending shaft 153 is equal to the inner hole diameter of the bending through hole 121, the bending shaft 153, the sliding shaft 152 and the stamping shaft 151 are all coaxial, and the distance between the bottom end face of the bending shaft 153 and the bottom end face of the stamping shaft 151 is greater than the thickness of the upper cutting piece 11.

[0039] Specifically, the movement state of the punching shaft 151 and the bending shaft 153 is the same. The punching shaft 151 can drive the bending shaft 153 to move toward the upper cutting piece 11 until the bottom end face of the punching shaft 151 contacts the top surface of the upper cutting piece 11. At this time, the bottom end face of the sliding shaft 152 contacts the top surface of the lower cutting piece 12, and the sliding shaft 152 moves upward relative to the punching shaft 151, so that the bending shaft 153 can be embedded in the bending through hole 121 to apply pressure to the central area of ​​the aluminum alloy circular plate.

[0040] Furthermore, when the bottom end face of the sliding shaft 152 coincides with the end face of the bending through hole 121, the outer surface of the bending shaft 153 coincides with the inner surface of the bending through hole 121. When the stamping shaft 151 drives the bending shaft 153 to move downward, the sliding shaft 152 moves upward relative to the bending shaft 153.

[0041] Specifically, the inner surface of the sliding shaft 152 slides relative to the outer surface of the bending shaft 153. When the sliding shaft 152 slides relative to the stamping shaft 151, it also slides relative to the bending shaft 153, so that the stamping shaft 151 drives the sliding shaft 152 to press down the upper cut piece 11 to obtain an aluminum alloy circular plate. The sliding shaft 152 moves upward relative to the stamping shaft 151, so that the bottom end face of the bending shaft 153 protrudes further from the bottom end face of the sliding shaft 152, so that when the stamping shaft 151 shears to obtain the aluminum alloy circular plate, the bottom end face of the bending shaft 153 contacts the aluminum alloy circular plate and presses it down, so that its central area enters the bending through hole 121 to form a shell with a cavity in the middle, and the shell falls through the penetrating bending through hole 121.

[0042] Example 2

[0043] like Figure 3 As shown, a battery cell shell processing device includes: a blanking device body 1, a punching device 2, a cleaning device 3 and a riveting device 4.

[0044] Specifically, the punching device body 1 can process the aluminum alloy plate into a shell with a cavity in the middle, the stamping device 2 can continuously stretch the side of the shell, the cleaning device 3 can clean the surface of the shell, and the riveting device 4 can rivet other parts of the battery cell shell onto the cleaned shell to form a product battery cell shell.

[0045] Example 3

[0046] A method for preparing a battery cell shell using the second embodiment includes the following steps:

[0047] S1: The blanking device body blanks and preliminarily bends the aluminum alloy sheet to obtain a first shell;

[0048] Specifically, the punching device body shears the aluminum alloy plate into an aluminum alloy circular plate through the shearing structure formed by the staggered upper cutting piece and the lower cutting piece, so that the edge of the aluminum alloy circular plate is regular and has few burrs; secondly, the bending axis squeezes the central area of ​​the aluminum alloy circular plate, that is, the area corresponding to the bending through hole, into the bending through hole, so that the peripheral area of ​​the aluminum alloy circular plate is folded vertically upward under the action of the bending through hole, and then the central area of ​​the aluminum alloy circular plate and its peripheral area form a cavity, thereby forming a first shell, which falls to the next workstation through the bending through hole.

[0049] S2: The punching device draws and stretches the side length of the first shell multiple times to obtain a second shell with dimensions that meet production requirements;

[0050] Specifically, the stamping device draws the side surface of the first shell multiple times so that the surface of the first shell will not have quality problems such as surface cracks during the drawing process, thereby ensuring the sealing of the battery cell shell. As the outer shell of the battery cell, the battery cell shell needs to focus on its sealing to improve the safety of the battery cell.

[0051] S3: The cleaning device performs hydrocarbon cleaning on the second shell to obtain a third shell;

[0052] Specifically, the cleaning device cleans the second shell using the dissolution, emulsification, and dispersion effects of hydrocarbon solvents at specific temperatures and pressures. Combined with ultrasonic technology, the strong mechanical vibrations generated by ultrasound help the cleaning agent better penetrate into the tiny gaps on the surface of the second shell to remove stubborn dirt. Finally, cleaning is performed under a vacuum state, which can improve cleaning efficiency and quality.

[0053] S4: The open end of the third shell faces the riveting end of the riveting device, and the riveting end rivets and presses the other parts of the battery cell shell and the third shell into shape to obtain a product battery cell shell.

[0054] Specifically, the riveting end of the riveting device penetrates deep into the interior of the third shell, so that the side of the third shell where other parts need to be installed contacts the support surface on which the third shell is placed, and then the riveting end presses the other parts toward the support surface, reducing the possibility of other parts shaking during the riveting process, improving the riveting accuracy of the riveting device, and thereby improving the product qualification rate of the battery cell shell.

[0055] 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.

[0056] The technology, shape, and structure not described in detail in the present invention are all well-known technologies.

Claims

1. A punching device, comprising a punching device body (1), characterized in that: The blanking device body (1) comprises: A lower cutting piece (12) and an upper cutting piece (11) with parallel opposite surfaces; a guide member (14) disposed between the upper cutting member (11) and the lower cutting member (12), wherein the length direction of the guide member (14) is perpendicular to the lower cutting member (12) and the upper cutting member (11); The upper cutting piece (11) or the lower cutting piece (12) can move along the length direction of the guide piece (14), and when the bottom surface of the upper cutting piece (11) and the top surface of the lower cutting piece (12) approach the same plane along the length direction of the guide piece (14) until they intersect, the bottom edge of the upper cutting piece (11) and the top edge of the lower cutting piece (12) form a shearing structure; The upper cutting piece is formed with an upper through hole, and the punching device body also includes: a stamping piece, the stamping piece includes a stamping shaft that coincides with the axis of the lower cutting piece, and a bent through hole is formed inside the lower cutting piece, and the inner hole diameter of the bent through hole is smaller than the diameter of the upper through hole, and the stamping piece also includes: a sliding shaft arranged inside the stamping shaft, a bending shaft arranged inside the sliding shaft, the bending shaft is fixedly connected to the stamping shaft, the bending shaft is slidably connected to the sliding shaft, the diameter of the bending shaft is equal to the inner hole diameter of the bent through hole, the bending shaft and the stamping shaft are coaxial, the distance between the bottom end face of the bending shaft and the bottom end face of the stamping shaft is greater than the thickness of the upper cutting piece, when the bottom end face of the sliding shaft coincides with the end face of the bent through hole, the outer surface of the bending shaft coincides with the inner surface of the bent through hole, and when the stamping shaft drives the bending shaft to move downward, the sliding shaft moves upward relative to the bending shaft.

2. The punching device according to claim 1, characterized in that: The bottom surface of the upper cutting piece (11) intersects with the upper through hole (111) to form an inner diameter edge of the bottom surface, and the inner diameter edge of the bottom surface is a type of the bottom surface edge. The top surface of the lower cutting piece (12) intersects with the side surface of the lower cutting piece (12) to form an outer circular edge of the top surface, and the outer circular edge of the top surface is a type of the top surface edge. The diameter of the inner diameter edge of the bottom surface is equal to the diameter of the outer circular edge of the top surface. When the bottom surface of the upper cutting piece (11) approaches along the length direction of the guide piece (14) until it intersects with the top surface of the lower cutting piece (12), the inner diameter edge of the bottom surface and the outer circular edge of the top surface form a shear structure.

3. The punching device according to claim 2, characterized in that: The axis of the punching piece (15) coincides with the axis of the lower cutting piece (12), the diameter of the punching shaft (151) is larger than the diameter of the upper through hole (111), and the punching shaft (151) can push the upper cutting piece (11) to move along the length direction of the guide piece (14) to form a shearing structure.

4. The punching device according to claim 3, characterized in that: The axis of the bent through hole (121) coincides with the axis of the lower cutting piece (12), and the bent through hole (121) is a through hole.

5. The punching device according to claim 4, characterized in that: The sliding shaft (152) has the same axis as the punching shaft (151), the sliding shaft (152) is slidably connected to the punching shaft (151), and the distance between the bottom end surface of the sliding shaft (152) and the bottom end surface of the punching shaft (151) is greater than the thickness of the upper cut piece (11), the diameter of the sliding shaft (152) is smaller than the diameter of the upper through hole (111), and the diameter of the sliding shaft (152) is greater than the inner hole diameter of the bent through hole (121).

6. A battery cell shell processing equipment, characterized in that: include: The blanking device body (1), the punching device (2), the cleaning device (3) and the riveting device (4) in the blanking device as claimed in claim 5.

7. The method for preparing a cell shell by using a cell shell processing device according to claim 6, characterized in that: The steps include: S1: The blanking device body blanks and preliminarily bends the aluminum alloy sheet to obtain a first shell; S2: The punching device draws and stretches the side length of the first shell multiple times to obtain a second shell with dimensions that meet production requirements; S3: The cleaning device performs hydrocarbon cleaning on the second shell to obtain a third shell; S4: The open end of the third shell faces the riveting end of the riveting device, and the riveting end rivets and presses the other parts of the battery cell shell and the third shell into shape to obtain a product battery cell shell.

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