Flanging device and flanging method

Abstract

The present invention discloses a flanging device and a flanging method, comprising a base, a first folding knife is fixedly arranged on the base, a second folding knife is arranged just above the first folding knife, and the first folding knife and the second folding knife are aligned in the vertical direction; a third folding knife is arranged on one side of the junction of the first folding knife and the second folding knife; the junction of the first folding knife and the second folding knife is a rotation point, the third folding knife is connected to a driving connecting rod mechanism, and the driving connecting rod mechanism drives the third folding knife to flip and fold the target folded object around the rotation point by 180 degrees. The first folding knife 1 and the second folding knife 2 are used to fix the edge of the battery core, and the third folding knife 3 is pushed by the driving connecting rod mechanism 5 to bend the edge of the battery core at a predetermined angle, and bend it to 180 degrees, so as to realize the flanging at one time, thereby overcoming the technical defect that the prior art cannot realize the one-time 180-degree flanging, improving the flanging quality, and increasing the flanging range.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery bend cornering, and in particular to a bend cornering device and a bend cornering method. Background Art

[0002] In the lithium battery manufacturing process, folding the skirts on both sides of the battery cell is one of the most important processes. The folding accuracy is strictly controlled. The folding technology is to flip the skirt of several millimeters 180° to form a double fold.

[0003] The existing technology is to use a roller with a gradual angle to fold the edge. As the battery cell packaging technology improves, the skirt edge becomes thicker and thicker, and the battery cell becomes longer and longer. The roller folding method will make it impossible to ensure the consistency of the folding width, and will result in poor appearance. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a flanging device and a flanging method to improve the width accuracy of the folded edge and maintain consistency and appearance integrity.

[0005] The present invention provides a flanging device, comprising a base, a first folding knife is fixedly arranged on the base, a second folding knife is arranged directly above the first folding knife, and the first folding knife and the second folding knife are aligned in the vertical direction;

[0006] A third folding knife is provided on one side of the junction of the first folding knife and the second folding knife; the junction of the first folding knife and the second folding knife is a rotation point, and the third folding knife is connected to a driving link mechanism, and the driving link mechanism drives the third folding knife to flip and fold the target folded object 180° around the rotation point.

[0007] Furthermore, a mounting plate is provided on a side of the second folding knife close to the third folding knife, and a second folding knife driving device is provided on the mounting plate. The second folding knife driving device drives the second folding knife to move in a vertical direction.

[0008] Furthermore, the driving connecting rod mechanism includes a driving motor and a connecting rod mechanism, the driving motor is arranged on the mounting plate, a mounting block is provided at the front end of the connecting rod mechanism, and the mounting block is fixedly connected to the third folding knife; the driving motor drives the connecting rod mechanism to move along a parallelogram trajectory.

[0009] Furthermore, the connecting rod mechanism includes a base, a first connecting block, a second connecting block, a third connecting block and a fourth connecting block;

[0010] The first connection block and the second connection block are respectively located on both sides of the base, and the front ends of the first connection block and the second connection block are connected by a first rotating shaft; the rear ends of the first connection block and the second connection block are connected by a second rotating shaft;

[0011] The third connecting block and the fourth connecting block are respectively located on both sides of the base, and the front ends of the third connecting block and the fourth connecting block are connected by a third rotating shaft; the rear ends of the third connecting block and the fourth connecting block are connected by a fourth rotating shaft;

[0012] The first connection block is located above the third connection block; the second connection block is located above the fourth connection block;

[0013] A triangular connecting block, the triangular connecting block being arranged on a side of the first connecting block and the third connecting block close to the base; the triangular connecting block is also arranged on a side of the second connecting block and the fourth connecting block close to the base;

[0014] The two ends of the second rotating shaft pass through the two triangular connecting blocks and are respectively rotatably connected to the first connecting block and the second connecting block; the fourth rotating shaft passes through the two triangular connecting blocks and is respectively rotatably connected to the third connecting block and the fourth connecting block;

[0015] The base rotating shaft has two ends that penetrate through the base and are respectively connected to the two triangular connecting blocks.

[0016] Furthermore, three connecting holes are respectively provided at the three corner positions of the triangular connecting block, one connecting hole is rotatably connected to the two ends of the second rotating shaft, one connecting hole is rotatably connected to the two ends of the fourth rotating shaft, and one connecting hole is rotatably connected to the two ends of the base rotating shaft.

[0017] Furthermore, there are two bases, one of which is arranged at the rear end of the connecting rod mechanism, and the other of which is arranged at the middle position of the connecting rod mechanism; the middle position of the first connecting block and the second connecting block is connected by a sixth rotating shaft, and the middle position of the third connecting block and the fourth connecting block is connected by a seventh rotating shaft.

[0018] Furthermore, another base rotating shaft is provided on the other base, and both ends of the other base rotating shaft are respectively rotatably connected to one connecting hole of the triangular connecting block, and the other two connecting holes of the triangular connecting block are respectively rotatably connected to both ends of the sixth rotating shaft and both ends of the seventh rotating shaft.

[0019] Furthermore, the mounting block is sleeved on the first rotating shaft and the third rotating shaft.

[0020] Furthermore, a pull rod is provided on both sides of the output shaft of the driving motor, one end of the two pull rods is fixedly connected to the mounting plate respectively, the other end of one pull rod is fixedly connected to the top surface of the first connecting block; the other end of the other pull rod is fixedly connected to the top surface of the second connecting block.

[0021] On the other hand, a method for flanging an edge is provided, using the flanging an edge device, comprising the following steps:

[0022] Place the cell skirt horizontally into the flanging device and attach it to the first folding knife;

[0023] The second folding knife is driven downward by the second folding knife driving device to cooperate with the first folding knife to press the skirt;

[0024] The third folding knife is driven by the driving link mechanism to flip the battery core skirt around the rotation point to a predetermined angle;

[0025] The second folding knife moves upward away from the first folding knife and reaches a position at a preset distance;

[0026] The third folding knife drives the connecting rod mechanism to continue to flip the battery skirt to 180 degrees;

[0027] The third folding knife is driven by the driving link mechanism to rotate to 180 degrees to complete one folding.

[0028] Beneficial effects of the invention: The embodiment of the invention provides a flanging device and a flanging method, comprising a base, a first folding knife is fixedly provided on the base, a second folding knife is provided just above the first folding knife, and the first folding knife and the second folding knife are aligned in the vertical direction; a third folding knife is provided on one side of the junction of the first folding knife and the second folding knife; the junction of the first folding knife and the second folding knife is a rotation point, the third folding knife is connected to a driving link mechanism, and the driving link mechanism drives the third folding knife to flip and fold the target folded object around the rotation point by 180°. The first folding knife 1 and the second folding knife 2 are used to fix the edge of the battery cell, and the driving link mechanism 5 is used to push the third folding knife 3 to bend the edge of the battery cell at a predetermined angle, and bend it to 180°, so as to achieve flanging at one time, thereby overcoming the technical defect that the prior art cannot achieve 180° flanging at one time, improving the flanging quality, and increasing the flanging range. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 A schematic structural diagram of an original state of a flanging device provided by an embodiment of the present invention;

[0031] Figure 2 A schematic structural diagram of an original state of a flanging device provided by an embodiment of the present invention;

[0032] Figure 3 A side view of an original state of a flanging device provided by an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the structure of a flanging device in working state provided by an embodiment of the present invention;

[0034] Figure 5 A side view of a flanging device in working state provided by an embodiment of the present invention;

[0035] Figure 6 A flowchart of the steps of a method for flanging an edge provided by an embodiment of the present invention.

[0036] In the figure: 100, base; 1, first folding knife; 2, second folding knife; 20, driving device; 3, third folding knife; 4, rotation point; 5, driving connecting rod mechanism; 50, driving motor; 51, connecting rod mechanism; 510, base; 511, first connecting block; 512, second connecting block; 513, third connecting block; 514, fourth connecting block; 515, triangular connecting block; 501, first rotating shaft; 502, second rotating shaft; 503, third rotating shaft; 504, fourth rotating shaft; 505, base rotating shaft; 506, sixth rotating shaft; 507, seventh rotating shaft; 6, mounting plate; 7, mounting block; 8, pull rod. DETAILED DESCRIPTION

[0037] The embodiments of the present invention provide a hem flanging device and a hem flanging method, which improve the width accuracy of the hem and maintain consistency and appearance integrity.

[0038] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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 creative work are within the scope of protection of the present invention.

[0039] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0040] Embodiment 1:

[0041] Please refer to Figure 1 , Figure 1 Schematic diagram of a structure of a flanging device, such as Figure 1 As shown, a flanging device comprises a base 100, on which a first folding knife 1 is fixedly provided, and a second folding knife 2 is provided just above the first folding knife 1, and the first folding knife 1 and the second folding knife 2 are aligned in the vertical direction;

[0042] A third folding knife 3 is provided on one side of the junction of the first folding knife 1 and the second folding knife 2; the junction of the first folding knife 1 and the second folding knife 2 is a rotation point 4, and the third folding knife 3 is connected to a driving link mechanism 5, and the driving link mechanism 5 drives the third folding knife 3 to flip and fold the target folded object 180° around the rotation point 4.

[0043] In a specific embodiment, the flanging hem device of this embodiment is used in the field of lithium battery skirt flanging technology. The first folding knife 1 is fixedly mounted on the base 100, and the second folding knife 2 is directly above the first folding knife 1. The blade of the first folding knife 1 is flat and can be used to place the skirt of the lithium battery cell. Generally, the size of the cell skirt is 2.3 mm. The skirt of the lithium battery cell is placed in the flanging hem device from a horizontal state and placed on the flat blade of the first folding knife 1. Then the second folding knife 2 is pressed down by the drive device 20 to press the cell skirt. The third folding knife 3 is driven by the driving connecting rod mechanism 5 to bend the cell skirt around the rotation point 4 at a certain angle. Then the second folding knife 2 is lowered and raised vertically to create space for the third folding knife 3. The third folding knife 3 continues to flip the cell skirt to 180° under the drive of the driving connecting rod mechanism 5, so that the cell skirt is folded 180°. The third folding knife 3 rotates 180° and leaves the cell skirt to complete a one-time flanging.

[0044] Working principle: The first folding knife 1 and the second folding knife 2 are used to fix the edge of the battery cell, and the third folding knife 3 is pushed by the driving connecting rod mechanism 5 to bend the edge of the battery cell at a preset angle, and bend it to 180°, so as to achieve folding at one time, thus overcoming the technical defect that the prior art cannot achieve 180° folding at one time, improving the folding quality and increasing the folding range.

[0045] Further, such as Figure 2 As shown, a mounting plate 6 is provided on a side of the second folding knife 2 close to the third folding knife 3, and a second folding knife driving device 20 is provided on the mounting plate 6. The second folding knife driving device 20 drives the second folding knife 2 to move in a vertical direction.

[0046] In a specific embodiment, the second folding knife driving device 20 is two cylinders, which drive the second folding knife 2 to move in the vertical direction.

[0047] Further, such as Figure 1-Figure 5 As shown, the driving linkage mechanism 5 includes a driving motor 50 and a linkage mechanism 51. The driving motor 50 is arranged on the mounting plate 6. A mounting block 7 is provided at the front end of the linkage mechanism 51. The mounting block 7 is fixedly connected to the third folding knife 3. The driving motor 50 drives the linkage mechanism 51 to move along a parallelogram trajectory.

[0048] In a specific embodiment, the driving connecting rod mechanism 5 includes a driving motor 50 and a connecting rod mechanism 51. A general connecting rod mechanism is also called a low-pair mechanism, which is a type of mechanical component and refers to a mechanism composed of several (more than two) components with a certain relative motion connected by a low-pair (rotating pair or moving pair).

[0049] In this embodiment, the connecting rod mechanism 51 is also composed of relatively moving structural parts to form a parallelogram. Under the drive of the driving motor 50, the connecting rod mechanism 51 uses the parallelogram principle to realize the turning of the connecting rod to a position state of 180°. In addition, the third folding knife 3 is installed at the front end of the connecting rod mechanism 51 by a mounting block 7. The mounting block 7 can be a cam or a component of other structures. The driving motor 50 drives the connecting rod mechanism 51 to move along the parallelogram track, so that the third folding knife 3 bends the battery core skirt 180° and then returns to the initial state.

[0050] Further, such as Figure 1-Figure 5 As shown, the connecting rod mechanism 51 includes a base 510, a first connecting block 511, a second connecting block 512, a third connecting block 513 and a fourth connecting block 514;

[0051] The first connection block 511 and the second connection block 512 are respectively located on both sides of the base 510, and the front ends of the first connection block 511 and the second connection block 512 are connected by a first rotating shaft 501; the rear ends of the first connection block 511 and the second connection block 512 are connected by a second rotating shaft 502;

[0052] The third connection block 513 and the fourth connection block 514 are respectively located on both sides of the base 510, and the front ends of the third connection block 513 and the fourth connection block 514 are connected through the third rotating shaft 503; the rear ends of the third connection block 513 and the fourth connection block 514 are connected through the fourth rotating shaft 504;

[0053] The first connection block 511 is located above the third connection block 513 ; the second connection block 512 is located above the fourth connection block 514 .

[0054] A triangular connecting block 515, wherein the triangular connecting block 515 is disposed on a side of the first connecting block 511 and the third connecting block 513 close to the base 510; the triangular connecting block 515 is also disposed on a side of the second connecting block 512 and the fourth connecting block 514 close to the base 510;

[0055] The two ends of the second rotating shaft 502 pass through the two triangular connecting blocks 515 and are rotatably connected to the first connecting block 511 and the second connecting block 512 respectively; the fourth rotating shaft 504 passes through the two triangular connecting blocks 515 and is rotatably connected to the third connecting block 513 and the fourth connecting block 514 respectively;

[0056] The base shaft 505 has two ends that pass through the base 510 and are connected to the two triangular connecting blocks 515 respectively.

[0057] In a specific embodiment, a base rotating shaft 505 is provided through the base 510 and through the middle position of the base 510. The first connecting block 511, the second connecting block 512, the third connecting block 513 and the fourth connecting block 514 on both sides of the base 510 are all long strips, wherein the first connecting block is located above the third connecting block 513, and the second connecting block 512 is located above the fourth connecting block 514. The front ends of the first connecting block 511 and the second connecting block 512 are connected by the first rotating shaft 501, and the rear ends of the first connecting block 511 and the second connecting block 512 are connected by the second rotating shaft 502; the front ends of the third connecting block 513 and the fourth connecting block 514 are connected by the third rotating shaft 503, and the rear ends of the third connecting block 513 and the fourth connecting block 514 are connected by the fourth rotating shaft 504. The above-mentioned connecting blocks and the rotating shaft form a parallelogram. Finally, through four triangular connecting blocks 515, the triangular connecting blocks 515 are respectively arranged at both ends of the base rotating shaft 505, arranged on the inner side of the first connecting block 511 and the second connecting block 512, and also on the inner side of the third connecting block 513 and the fourth connecting block 514. The second rotating shaft 512 and the fourth rotating shaft 514 are connected through the triangular connecting block 515, so that the second rotating shaft 512, the fourth rotating shaft 514 and the base rotating shaft 505 are respectively sleeved at three corners of the triangular connecting block 515, and the second rotating shaft 512, the fourth rotating shaft 514 and the base rotating shaft 515 rotate along with the triangular connecting block 515.

[0058] Further, such as Figure 2 or Figure 4 As shown, the three corner positions of the triangular connecting block 515 are respectively provided with three connecting holes, one of the connecting holes is rotatably connected to the two ends of the second rotating shaft 502, one of the connecting holes is rotatably connected to the two ends of the fourth rotating shaft 504, and one of the connecting holes is rotatably connected to the two ends of the base rotating shaft 505.

[0059] In a specific embodiment, three connection holes are respectively provided at three corners of the triangular connection block 515, and the three connection holes are rotatably connected to the second rotating shaft 502, the fourth rotating shaft 504 and the base rotating shaft 505 respectively, driving the connection mechanism 51 to move along the parallelogram trajectory.

[0060] Further, such as Figure 2 As shown, there are two bases 510, one base 510 is arranged at the rear end of the connecting rod mechanism 51, and the other base 510 is arranged at the middle position of the connecting rod mechanism 51; the middle position of the first connecting block 511 and the second connecting block 512 is connected by the sixth rotating shaft 506, and the middle position of the third connecting block 513 and the fourth connecting block 514 is connected by the seventh rotating shaft 507.

[0061] In a specific embodiment, two groups of bases 510 are provided in the connecting rod mechanism 51, and a base rotating shaft 505 is passed through the middle of each base 510. One group of bases 510 is arranged at the rear end, and the other group of bases 510 is arranged in the middle position. A third folding knife 3 is provided at the front end of the connecting rod mechanism 51, and the third folding knife 3 is abutted against the rotation point 4. The rotation point 4 and the first rotating shaft 501 and the third rotating shaft 503 form a virtual triangle. When the battery cell skirt is folded, the first connecting block 511, the second connecting block 512 and the second rotating shaft 502 of the upper layer of the connecting rod mechanism 51 are flipped and moved forward under the drive of the triangular connecting block 515. The upper layer height of the connecting rod mechanism 51 spans the top surface of the base 510. When the battery cell skirt is folded and rotated, the upper layer of the connecting rod mechanism 51 returns to its original position, and the upper layer of the connecting rod mechanism 51 is lower than the top surface of the base 510.

[0062] Further, such as Figure 3 or Figure 5 As shown, another base rotating shaft 505 is provided on the other base 510, and the two ends of the other base rotating shaft 505 are respectively rotatably connected to a connecting hole of a triangular connecting block 515, and the other two connecting holes of the triangular connecting block 515 are respectively rotatably connected to the two ends of the sixth rotating shaft 506 and the two ends of the seventh rotating shaft 507.

[0063] In a specific embodiment, a group of bases and base shafts 505 are placed in the middle position of the connecting rod mechanism 51, two triangular connecting blocks 515 are added, and two shafts are added, the sixth shaft 506 and the seventh shaft 507, so as to increase the stability and power of the movement of the connecting rod mechanism 51.

[0064] Furthermore, the mounting block 7 is sleeved on the first rotating shaft 501 and the third rotating shaft 503 .

[0065] In a specific embodiment, the mounting block 7 at the front end of the connecting rod mechanism 51 is sleeved on the first rotating shaft 501 and the third rotating shaft 503 , and can control the movement of the first rotating shaft 501 and the third rotating shaft 503 .

[0066] Further, such as Figure 1-Figure 5 As shown, a pull rod 8 is provided on both sides of the output shaft of the driving motor 50, one end of the two pull rods 8 is fixedly connected to the mounting plate 6 respectively, the other end of one pull rod 8 is fixedly connected to the top surface of the first connecting block 511; the other end of the other pull rod 8 is fixedly connected to the top surface of the second connecting block 512.

[0067] In a specific embodiment, a pull rod 8 is respectively provided on both sides of the driving motor 50, and the pull rod 8 pulls the connecting rod mechanism 51 to move along a parallelogram track.

[0068] In summary, the embodiment of the present invention provides a flanging device, including a base, a first folding knife is fixedly provided on the base, a second folding knife is provided just above the first folding knife, and the first folding knife and the second folding knife are aligned in the vertical direction; a third folding knife is provided on one side of the junction of the first folding knife and the second folding knife; the junction of the first folding knife and the second folding knife is a rotation point, the third folding knife is connected to a driving link mechanism, and the driving link mechanism drives the third folding knife to flip and fold the target folded object 180° around the rotation point. The first folding knife 1 and the second folding knife 2 are used to fix the edge of the battery cell, and the third folding knife 3 is pushed by the driving link mechanism 5 to bend the edge of the battery cell at a predetermined angle, and bend it to 180°, so as to achieve flanging at one time, thereby overcoming the technical defect that the prior art cannot achieve 180° flanging at one time, improving the flanging quality, and increasing the flanging range.

[0069] Embodiment 2:

[0070] like Figure 6 As shown, a method for turning an edge comprises the following steps:

[0071] Step 101: Place the cell skirt horizontally into the flanging device and attach it to the first folding knife;

[0072] Specifically, the cell skirt is horizontally placed on the first folding knife of the flanging device. The blade of the first folding knife is flat and can hold the cell skirt.

[0073] Step 102: The second folding knife is driven downward by the second folding knife driving device to cooperate with the first folding knife;

[0074] Press the skirt tightly;

[0075] Specifically, the third folding knife is driven by the driving link mechanism to flip the battery core skirt around the rotation point to a predetermined angle.

[0076] Step 103: the third folding knife is driven by the driving link mechanism to flip around the rotation point to a predetermined angle;

[0077] Specifically, the third folding knife is driven by the driving link mechanism to flip around the rotation point to a predetermined angle;

[0078] Step 104: the second folding knife moves upward away from the first folding knife and reaches a position at a preset distance;

[0079] Specifically, after the battery cell skirt is folded to a certain angle, the second folding knife moves upward away from the first folding knife and reaches a position at a preset distance.

[0080] Step 105: The third folding knife drives the connecting rod mechanism to continue to flip the battery skirt to 180 degrees;

[0081] Specifically, the third folding knife continues to flip and fold the battery skirt to 180 degrees.

[0082] Step 106: The third folding knife is driven by the driving link mechanism to rotate to 180 degrees to complete one folding.

[0083] Specifically, the third folding knife rotates 180 degrees to complete one folding.

[0084] In summary, a method for flanging an edge of the present invention includes the following steps: the battery cell skirt is horizontally inserted into the flanging edge device and attached to the first folding knife; the second folding knife is driven by the second folding knife driving device to press the skirt with the first folding knife; the third folding knife is driven by the driving link mechanism to rotate around the rotation point at a predetermined angle; the second folding knife moves upward away from the first folding knife to a preset distance; the third folding knife continues to flip the battery skirt to 180° by the driving link mechanism; the third folding knife is rotated back to 180° by the driving link mechanism to complete a folding. By utilizing the parallelogram structural principle of the present invention, the link mechanism is flipped 180°, the battery skirt is folded once, and the folding efficiency is improved.

[0085] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flanging device, characterized in that: The invention comprises a base (100), a first folding knife (1) being fixedly arranged on the base (100), a second folding knife (2) being arranged directly above the first folding knife (1), and the first folding knife (1) and the second folding knife (2) being aligned in the vertical direction; A third folding knife (3) is provided on one side of the junction of the first folding knife (1) and the second folding knife (2); the junction of the first folding knife (1) and the second folding knife (2) is a rotation point (4); the third folding knife (3) is connected to a driving connecting rod mechanism (5); the driving connecting rod mechanism (5) drives the third folding knife (3) to flip and fold the target foldable object 180 degrees around the rotation point (4); A mounting plate (6) is provided on a side of the second folding knife (2) close to the third folding knife (3), and a second folding knife driving device (20) is provided on the mounting plate (6), and the second folding knife driving device (20) drives the second folding knife (2) to move in a vertical direction; The driving connecting rod mechanism (5) comprises a driving motor (50) and a connecting rod mechanism (51); the driving motor (50) is arranged on the mounting plate (6); a mounting block (7) is arranged at the front end of the connecting rod mechanism (51); the mounting block (7) is fixedly connected to the third folding knife (3); the driving motor (50) drives the connecting rod mechanism (51) to move along a parallelogram track; The connecting rod mechanism (51) comprises a base (510), a first connecting block (511), a second connecting block (512), a third connecting block (513) and a fourth connecting block (514); The first connection block (511) and the second connection block (512) are respectively located on two sides of the base (510); the front ends of the first connection block (511) and the second connection block (512) are connected via a first rotating shaft (501); and the rear ends of the first connection block (511) and the second connection block (512) are connected via a second rotating shaft (502); The third connecting block (513) and the fourth connecting block (514) are respectively located on two sides of the base (510); the front ends of the third connecting block (513) and the fourth connecting block (514) are connected via a third rotating shaft (503); the rear ends of the third connecting block (513) and the fourth connecting block (514) are connected via a fourth rotating shaft (504); The first connection block (511) is located above the third connection block (513); the second connection block (512) is located above the fourth connection block (514); a triangular connection block (515), the triangular connection block (515) being arranged on a side of the first connection block (511) and the third connection block (513) close to the base (510); the triangular connection block (515) being also arranged on a side of the second connection block (512) and the fourth connection block (514) close to the base (510); The two ends of the second rotating shaft (502) penetrate the two triangular connecting blocks (515) and are respectively rotatably connected to the first connecting block (511) and the second connecting block (512); the fourth rotating shaft (504) penetrates the two triangular connecting blocks (515) and is respectively rotatably connected to the third connecting block (513) and the fourth connecting block (514); A base rotating shaft (505), two ends of which pass through the base (510) and are respectively connected to the two triangular connecting blocks (515); The mounting block (7) is sleeved on the first rotating shaft (501) and the third rotating shaft (503); A pull rod (8) is provided on each side of the output shaft of the driving motor (50); one end of the two pull rods (8) is fixedly connected to the mounting plate (6) respectively; the other end of one pull rod (8) is fixedly connected to the top surface of the first connecting block (511); and the other end of the other pull rod (8) is fixedly connected to the top surface of the second connecting block (512).

2. The flanging device according to claim 1, characterized in that: The three corners of the triangular connection block (515) are respectively provided with three connection holes, one of the connection holes is rotatably connected to the two ends of the second rotating shaft (502), one of the connection holes is rotatably connected to the two ends of the fourth rotating shaft (504), and one of the connection holes is rotatably connected to the two ends of the base rotating shaft (505).

3. The flanging device according to claim 2, characterized in that: There are two bases (510), one of which is arranged at the rear end of the connecting rod mechanism (51), and the other of which is arranged at the middle position of the connecting rod mechanism (51); the middle position of the first connecting block (511) and the second connecting block (512) is connected via a sixth rotating shaft (506), and the middle position of the third connecting block (513) and the fourth connecting block (514) is connected via a seventh rotating shaft (507).

4. The flanging device according to claim 3, characterized in that: Another base rotating shaft (505) is provided on the other base (510), and two ends of the other base rotating shaft (505) are respectively rotatably connected to one connecting hole of a triangular connecting block (515), and the other two connecting holes of the triangular connecting block (515) are respectively rotatably connected to two ends of the sixth rotating shaft (506) and two ends of the seventh rotating shaft (507).

5. A method for flanging an edge, characterized in that: Using the flanging device according to any one of claims 1 to 4 comprises the following steps: Place the cell skirt horizontally into the flanging device and attach it to the first folding knife; The second folding knife is driven downward by the second folding knife driving device to cooperate with the first folding knife to press the skirt; The third folding knife is driven by the driving link mechanism to flip the battery core skirt around the rotation point to a predetermined angle; The second folding knife moves upward away from the first folding knife and reaches a position at a preset distance; The third folding knife drives the connecting rod mechanism to continue to flip the battery core skirt to 180°; The third folding knife is driven by the driving link mechanism to rotate to 180 degrees to complete one folding.

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