Battery separator production anti-curling structure

Abstract

The utility model discloses a kind of battery separator production anti-edge lifting structure, comprising: two groups of supporting frame, are separately arranged in the both sides of forming machine, and are fixed between forming roller group and guide roller group by locking member;Conical roller, located above battery separator corner, its small diameter end faces outward, large diameter end faces inward, for flattening battery separator edge lifting;Linking rod, one end is rotatably connected with conical roller, the other end is movably supported in supporting frame;And pressure regulating assembly, between supporting frame and linking rod, for adjusting the flattening pressure of conical roller to battery separator corner.The utility model is equipped with pressure regulating assembly, by adjusting knob and the cooperation of guide rod, the quick adjustment of conical roller pressure can be realized, the edge pressure demand of different thickness, different material diaphragm is satisfied, the flatness of diaphragm edge is guaranteed.

Description

Technical Field

[0001] This utility model relates to an anti-warping structure for battery separator production. Background Technology

[0002] The battery separator is the "third electrode" of a lithium-ion battery, and its surface smoothness directly affects the uniformity of the cell winding tension and the final safety performance. In wet biaxial stretching production lines, after exiting the forming rollers, the separator often develops a defect where the edges on both sides curl upwards (commonly known as "ruffled edges") due to stress relaxation, uneven cooling, or sudden changes in winding tension. If the curling edge is greater than 1 mm, it is very easy to be scratched by the clamps when entering the downstream cross-stretching machine, forming permanent cracks and causing a 5-10% decrease in yield.

[0003] Patent CN220763503U discloses an anti-warping device for battery separator production. It involves installing conical rollers on both sides of a forming machine, relying on the separator's own tension to flatten the edges. However, when changing separator thickness specifications (commonly 7-25 μm), the machine needs to be stopped for adjustment. The gap between the conical rollers cannot quickly follow this adjustment, thus affecting production efficiency. Furthermore, the conical rollers lack pressure buffering, making them prone to forming marks at points of sudden thickness changes.

[0004] Therefore, a structure for preventing edge warping in battery separator production is proposed. Utility Model Content

[0005] The purpose of this invention is to provide an anti-warping structure for battery separator production, in order to solve the problem mentioned in the background art that the prior art cannot quickly adjust the rolling pressure for different separator thicknesses, thus affecting the production efficiency.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a battery separator manufacturing anti-warping structure, comprising: Two sets of support frames are located on both sides of the forming machine and are fixed between the forming roller group and the guide roller group by fasteners; A tapered roller, located above the corner of the battery separator, with its small diameter end facing outward and its large diameter end facing inward, is used to flatten the warped edges of the battery separator. A connecting rod, one end of which is rotatably connected to a conical roller, and the other end which is movably supported vertically on a support frame; and The pressure regulating component, located between the support frame and the connecting rod, is used to adjust the flattening pressure of the conical roller on the corners of the battery separator.

[0007] Preferably, the pressure regulating assembly includes an regulating groove formed on the side of the support frame, a guide rod is provided inside the regulating groove, and a pressure regulating plate is provided on the outer periphery of the guide rod. The pressure regulating plate is threadedly engaged with the guide rod and is circumferentially limited within the regulating groove, allowing it to move only linearly up and down.

[0008] Preferably, the guide rod is rotatably and vertically disposed in the adjustment groove, and the top end of the guide rod extends to the top end of the support frame and is connected to an adjustment knob.

[0009] Preferably, a pressure spring is provided on the outer periphery of the guide rod. The pressure spring is located between the pressure adjusting plate and the connecting rod, and converts the helical displacement of the adjusting plate into elastic pressure on the connecting rod.

[0010] Preferably, the pressure regulating plate is in the shape of an "I", with its two flanges slidingly attached to the two side walls of the regulating groove to prevent the pressure regulating plate from rotating circumferentially.

[0011] Preferably, the connecting rod has a through hole that mates with the guide rod, so that the connecting rod can move linearly around the outer periphery of the guide rod through the through hole.

[0012] Preferably, a bearing seat is provided between the connecting rod and the tapered roller so that the tapered roller rolls on the side of the connecting rod via the bearing seat.

[0013] Preferably, the lower edge of the tapered roller is higher than the surface of the battery separator on the forming machine, so that the tapered roller presses down on the warped edge of the battery separator to flatten it.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention, through the setting of a pressure adjustment component, can quickly adjust the pressure of the conical roller by cooperating with the adjustment knob and guide rod, so as to meet the edge pressure requirements of diaphragms of different thicknesses and materials, and ensure the flatness of the diaphragm edges.

[0015] At the same time, the pressure of the conical roller can be quickly adjusted when switching diaphragm thickness specifications, without the need to stop the machine for complex adjustments, which significantly shortens the changeover time and improves the production efficiency of the production line.

[0016] The pressure spring in the pressure regulating assembly can buffer sudden changes in diaphragm thickness, avoiding dents caused by rigid compression and improving the surface quality of the diaphragm. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 3 This is a side view of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the conical roller side structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the pressure regulating plate structure according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the adjusting groove structure according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the connecting rod structure according to an embodiment of the present utility model.

[0018] In the diagram: 1. Support frame; 2. Conical roller; 3. Connecting rod; 31. Through hole; 4. Pressure regulating assembly; 41. Adjusting groove; 42. Guide rod; 43. Pressure regulating plate; 44. Adjusting knob; 45. Pressure spring; 5. Bearing seat. Detailed Implementation

[0019] To address the problem that existing technologies cannot quickly adjust rolling pressure for different diaphragm thicknesses, thus affecting production efficiency, this utility model provides an anti-warping structure for battery diaphragm production. The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] Please see Figure 1-7 This utility model provides an anti-warping structure for battery separator production, comprising: Two sets of support frames 1 are respectively located on both sides of the forming machine and are fixed between the forming roller group and the guide roller group by fasteners; The conical roller 2 is located above the corner of the battery separator, with its small diameter end facing outward and its large diameter end facing inward. It is used to flatten the warped edge of the battery separator. The lower edge of the conical roller 2 is higher than the surface of the battery separator on the forming machine so that the conical roller 2 can press the warped edge of the battery separator to flatten it.

[0021] A connecting rod 3 is rotatably connected at one end to the conical roller 2, and its other end is movably supported on the support frame 1. A through hole 31 is provided at the connecting rod 3 to mate with the guide rod 42, allowing the connecting rod 3 to move linearly around the outer periphery of the guide rod 42 through the through hole 31. A bearing seat 5 is provided between the connecting rod 3 and the conical roller 2, allowing the conical roller 2 to roll on the side of the connecting rod 3 via the bearing seat 5.

[0022] A pressure regulating component 4 is provided, located between the support frame 1 and the connecting rod 3, for adjusting the flattening pressure of the conical roller 2 on the corners of the battery separator. The pressure regulating component 4 includes an regulating groove 41 formed on the side of the support frame. A guide rod 42 is provided inside the regulating groove 41, and a pressure regulating plate 43 is provided on the outer periphery of the guide rod 42. The pressure regulating plate 43 is threadedly engaged with the guide rod 42 and is circumferentially limited within the regulating groove 41, allowing only linear up-and-down movement. The guide rod 42 is rotatably and vertically positioned within the regulating groove 41, and its top extends to the top of the support frame 1, where an adjusting knob 44 is connected. A pressure spring 45 is provided on the outer periphery of the guide rod 42, located between the pressure regulating plate 43 and the connecting rod 3, converting the helical displacement of the regulating plate into elastic pressure on the connecting rod 3. The pressure regulating plate 43 is I-shaped, with its two flanges slidingly against the side walls of the regulating groove 41 to prevent circumferential rotation of the pressure regulating plate 43.

[0023] The working principle of the anti-warping structure for battery separator production provided by this utility model is as follows: When in use, after the battery separator is extruded by the extruder, the operator can sequentially introduce the end of the battery separator into the forming roller group, the conical roller 2 and the guide roller group. When introducing it into the conical roller 2, the edges on both sides of the battery separator can be turned outward and pressed down to the lower end of the conical roller 2 on both sides. When switching battery separator specifications, rotate the adjustment knob 44. The adjustment knob 44 is connected to the guide rod 42 and rotates. The thread on the outer circumference of the guide rod 42 engages with the thread at the pressure adjustment plate 43, controlling the pressure adjustment plate 43 to move linearly up and down, thereby adjusting the squeezing and compression amount of the pressure spring 45 and controlling the roller pressure of the pressure spring 45.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery separator manufacturing anti-warping structure, characterized in that, include: Two sets of support frames (1) are respectively located on both sides of the forming machine and are fixed between the forming roller group and the guide roller group by fasteners; A tapered roller (2) is located above the corner of the battery separator, with its small diameter end facing outward and its large diameter end facing inward, and is used to flatten the warped edge of the battery separator. Connecting rod (3), one end of which is rotatably connected to tapered roller (2), and the other end of which is movably supported on support frame (1); and The pressure adjustment component (4) is located between the support frame (1) and the connecting rod (3) and is used to adjust the flattening pressure of the conical roller (2) on the corner of the battery separator.

2. The anti-warping structure for battery separator production according to claim 1, characterized in that: The pressure regulating assembly (4) includes an regulating groove (41) opened on the side of the support frame. A guide rod (42) is provided inside the regulating groove (41). A pressure regulating plate (43) is provided on the outer periphery of the guide rod (42). The pressure regulating plate (43) is threadedly engaged with the guide rod (42) and is circumferentially limited in the regulating groove (41) so that it can only move linearly up and down.

3. The anti-warping structure for battery separator production according to claim 2, characterized in that: The guide rod (42) is rotatably and vertically disposed in the adjustment groove (41), and the top end of the guide rod (42) extends to the top end of the support frame (1) and is connected to the adjustment knob (44).

4. The anti-warping structure for battery separator production according to claim 3, characterized in that: A pressure spring (45) is provided on the outer periphery of the guide rod (42). The pressure spring (45) is located between the pressure adjusting plate (43) and the connecting rod (3), and converts the helical displacement of the adjusting plate into elastic pressure on the connecting rod (3).

5. The anti-warping structure for battery separator production according to claim 2, characterized in that: The pressure regulating plate (43) is in the shape of an "I" and its two flanges slide against the two side walls of the regulating groove (41) to prevent the pressure regulating plate (43) from rotating circumferentially.

6. A battery separator manufacturing anti-warping structure according to any one of claims 1-3, characterized in that: The connecting rod (3) has a through hole (31) that mates with the guide rod (42) so that the connecting rod (3) can move linearly around the guide rod (42) through the through hole (31).

7. The anti-warping structure for battery separator production according to claim 1, characterized in that: A bearing seat (5) is provided between the connecting rod (3) and the tapered roller (2) so that the tapered roller (2) rolls on the side of the connecting rod (3) through the bearing seat (5).

8. A battery separator manufacturing anti-warping structure according to any one of claims 1-3, characterized in that: The lower edge of the conical roller (2) is higher than the surface of the battery separator on the forming machine so that the conical roller (2) presses the raised edge of the battery separator to flatten it.

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