Pressing knife and folding table for preventing indentation

Abstract

The utility model relates to the technical field of pole piece battery production, and particularly discloses a pressing knife and a stacking table for preventing indentation. The pressing knife comprises a pressing knife main body, the pressing knife main body comprises a connecting end and a pressing end; the pressing knife body is provided with a pressing contact face used for making contact with a material piece. The edge, close to the pressing end, of the pressing contact face is provided with a first fillet structure. The pressing knife body comprises a first surface located on the horizontal plane and a second surface located on the vertical plane. The first fillet structure is disposed along the first surface toward the second surface. According to the scheme, the edge of the pressing contact face can be rounded in the thickness direction through the first rounded corner structure, then linear contact between the edge position and a material piece is changed into face-shaped contact, the stress area between the pressing knife body and the material piece is increased under the same pressure, and the edge pressure intensity is reduced; and the risk that indentations are generated on the edge part is effectively reduced.

Description

Technical Field

[0001] This application relates to the field of electrode battery manufacturing technology, and in particular to a pressing knife and stacking platform for preventing indentation. Background Technology

[0002] In the electrode production process, the stacking process refers to the alternating stacking of slit electrodes and separators in a specific order, ultimately forming a stack. During the stacking of electrodes and separators, a pressure cutter is needed to fix the electrodes or separators, ensuring alignment of the sheets on the stack.

[0003] In actual operation, after the pressure cutter presses down onto the material sheet, it needs to apply pressure to the material sheet to clamp it and prevent displacement. However, in the contact area between the pressure cutter and the material sheet, the edge of the contact area on the pressure cutter has a small contact area with the material sheet, resulting in high pressure and a high risk of indentation at the edge of the contact area on the material sheet.

[0004] Meanwhile, in the clamping area where the pressure knife clamps the sheet, there can be inconsistencies in the degree of clamping, resulting in indentations. Specifically, during the sheet stacking process, when the sheets are piled up, the actual height of the area near the center is often higher than that of the area near the edge. Therefore, under the same production settings, the pressure knife leaves a deeper indentation on the area near the center of the sheet, making the area near the center of the sheet more prone to indentations. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a pressure knife and stacking platform for preventing indentation, so as to solve some or all of the above-mentioned problems.

[0006] To achieve the above-mentioned technical objectives, the first aspect of this application provides a pressure tool for preventing indentation, comprising: a pressure tool body;

[0007] The pressing knife body includes a connecting end and a pressing end;

[0008] The pressure knife body has a pressing contact surface for contacting the material sheet;

[0009] The edge of the pressing contact surface near the pressing end is provided with a first rounded corner structure;

[0010] The pressure knife body includes a first surface located in a horizontal plane and a second surface located in a vertical plane;

[0011] The first rounded corner structure is disposed along the first surface toward the second surface.

[0012] Furthermore, the corner of the pressing contact surface near the pressing end is provided with a second rounded corner structure;

[0013] The second rounded corner structure is disposed along the first surface toward the second surface;

[0014] The second rounded corner structure is smoothly connected to the first rounded corner structure.

[0015] Furthermore, the first rounded corner structure includes multiple slopes;

[0016] The plurality of the slopes are adjacent to each other in a smooth transition along the thickness direction of the pressure body.

[0017] Furthermore, the pressing contact surface is provided with a groove.

[0018] Furthermore, the groove edge is provided with a groove chamfer structure.

[0019] Furthermore, the pressing knife body comprises multiple components;

[0020] The multiple pressure knife bodies have the same shape, or the pressing contact surfaces of the multiple pressure knife bodies have different shapes.

[0021] Furthermore, the pressure knife body is provided with a detection hole;

[0022] The detection hole is disposed through the pressing contact surface.

[0023] Furthermore, the outer periphery of the detection hole is provided with a chamfered structure.

[0024] A second aspect of this application provides a stacking platform, comprising: a stacking platform body, a material box, and a pressure knife for preventing indentation as described in any of the above claims;

[0025] The stacking platform is used for stacking the feed sheets;

[0026] The pressure knife body of the pressure knife used for preventing indentation is disposed on the stacking platform body;

[0027] The material box is used to store the material sheet, and the material box is located on the side of the stacking platform body.

[0028] Furthermore, it also includes: a material box drive mechanism;

[0029] The material box drive mechanism is connected to the material box and is used to drive the material box to move horizontally to align with or avoid the loading port of the stacking platform body.

[0030] As can be seen from the above technical solutions, this application provides a pressure knife and stacking platform for preventing indentation; wherein, the pressure knife includes: a pressure knife body; the pressure knife body includes a connecting end and a pressing end; the pressure knife body has a pressing contact surface for contacting the material sheet; the pressing contact surface is provided with a first rounded corner structure near the edge of the pressing end; the pressure knife body includes a first surface located in a horizontal plane and a second surface located in a vertical plane; the first rounded corner structure is provided along the first surface toward the second surface.

[0031] In this solution, the first rounded corner structure can round the edge of the pressing contact surface in the thickness direction, thereby changing the contact between the edge and the material sheet from a linear contact to a surface contact. This increases the force-bearing area between the pressing blade body and the material sheet under the same pressure and reduces the edge pressure, effectively reducing the risk of indentations at the edge. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a pressure knife for preventing indentation with the pressing contact surface facing upward, provided in an embodiment of this application.

[0034] Figure 2 A schematic diagram of a lifting cylinder for connecting a pressure knife to prevent indentation, provided in an embodiment of this application;

[0035] Figure 3 A schematic diagram of the structure of a pressure knife for preventing indentation provided in this application embodiment, in the state where a groove is provided and the pressing contact surface faces upward.

[0036] Figure 4 This application provides a schematic diagram of the structure of a pressure knife for preventing indentation when the shape of the pressing contact surface is close to a right-angled trapezoid.

[0037] Figure 5 This is a schematic diagram of a stacking platform provided in an embodiment of this application;

[0038] In the picture:

[0039] 10. Pressure knife body; 11. Connecting end; 12. Clamping end; 13. Clamping contact surface; 14. First rounded corner structure; 141. Sloping surface; 15. Groove; 151. Groove chamfer structure; 16. Detection hole; 101. First surface; 102. Second surface; 161. Detection hole chamfer structure;

[0040] 17. Second rounded corner structure;

[0041] 20. Stacking platform main body; 21. Lifting cylinder;

[0042] 30. Material box;

[0043] 40. Material box drive mechanism. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0045] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0047] Please see Figure 1 The first aspect of this application provides a pressure knife for preventing indentation, comprising: a pressure knife body 10. The pressure knife body 10 can be applied to an existing stacking platform. A stacking platform refers to a device that allows electrode sheets, diaphragms, and other sheets to be stacked to form a stack. The pressure knife body 10 disposed on the stacking platform can use the installation and connection methods in the prior art, specifically enabling the pressure knife body 10 to perform a pressing action on the sheets on the stacking platform to press the sheets tightly.

[0048] The pressing body 10 includes a connecting end 11 and a pressing end 12. The connecting end 11 is the end of the pressing body 10 used to connect with the pressing drive mechanism; correspondingly, the pressing end 12 is the end away from the connecting end 11 and can be used to press the material sheet.

[0049] The pressing drive mechanism refers to the mechanism on the stack used to drive the pressing knife body 10 to perform a pressing action. After the output end of the pressing drive mechanism is connected to the connecting end 11, it can drive the pressing knife body 10 to perform a pressing action. Specifically, the pressing drive mechanism can use existing technology, and correspondingly, the method of driving the pressing knife body 10 to perform a pressing action after the output end of the pressing drive mechanism is connected to the connecting end 11 can use existing technology. As one embodiment provided in this example, please refer to... Figure 2 The pressing drive mechanism can be a lifting cylinder 21 and a translation cylinder (not shown in the figure); the output end of the translation cylinder is connected to the lifting cylinder 21; the output end of the lifting cylinder 21 is fixedly connected to the connecting end 11 by bolts or other connecting parts. Through the cooperation of the translation cylinder and the lifting cylinder 21, the pressing body 10 can be driven to perform pressing actions such as translation, rising, translation again, and pressing down.

[0050] The pressure cutter body 10 has a pressing contact surface 13 for contacting the material sheet. In this embodiment, for ease of explanation, the pressure cutter body 10 is placed horizontally, so the pressing contact surface 13 is a horizontal plane, and in actual use, the pressing contact surface 13 is located on the bottom surface of the pressure cutter body 10. After the pressure cutter body 10 performs a pressing action, the pressing contact surface 13 is used to contact the material sheet and apply a pressing force to the material sheet.

[0051] In this embodiment, a first rounded corner structure 14 is provided on the edge of the pressing contact surface 13 near the pressing end 12; the first rounded corner structure 14 is provided along a first direction; the first direction is the thickness direction of the pressing body 10, that is... Figure 1 The Z-axis direction is shown in the diagram. Specifically, the pressure knife body 10 includes a first surface 101 located in a horizontal plane and a second surface 102 located in a vertical plane. A first rounded corner structure 14 is provided along the first surface 101 toward the second surface 102, such that the boundary between the first surface 101 and the second surface 102 forms a rounded corner structure. It should be noted that this embodiment is described with the pressure knife body 10 placed horizontally. When the pressure knife body 10 is placed in other orientations, the positional state of the first surface 101 and the second surface 102 will change accordingly. That is, in this embodiment, the top and bottom surfaces of the pressure knife body 10 both belong to the first surface 101, and the pressing contact surface 13 can be provided on the first surface 101 located on the bottom surface.

[0052] In practical applications, multiple edges of the pressing contact surface 13 can be provided with a first rounded corner structure 14. The first rounded corner structure 14 can round the corners of the edges of the pressing contact surface 13 in the thickness direction; under the same pressure adjustment, it can increase the contact area between the pressing contact surface 13 and the material sheet, reduce the pressure between the pressing contact surface 13 and the material sheet, thereby reducing the risk of indentation and achieving the effect of preventing indentation.

[0053] Furthermore, due to factors such as the difference in gas escape velocity of the material sheets and the action of the pressure knife body 10 on the corner area of ​​the stack, there is a slight height difference between the actual height of the part of the stack near the middle area and the actual height of the part near the edge area.

[0054] Since the clamping end 12 is closer to the center area of ​​the sheet than the connecting end 11, the first rounded corner structure 14 located on the edge of the clamping contact surface 13 near the clamping end 12 can provide a buffer space for the part near the center area of ​​the sheet, thereby reducing the risk of indentation in the part of the sheet near the center area of ​​the sheet in the clamping area.

[0055] In a further improved embodiment, a second rounded corner structure 17 is provided at the end corner of the pressing contact surface 13 near the pressing end 12; the second rounded corner structure 17 is provided along the first direction, that is, the second rounded corner structure 17 is also provided along the first surface 101 to the second surface 102; the second rounded corner structure 17 and the first rounded corner structure 14 are smoothly connected.

[0056] In the embodiments provided in this application, the first rounded corner structure 14 and the second rounded corner structure 17 are arranged along the first direction, which means that the arc direction of the rounded corner structure is located on the vertical surface. Specifically, the pressing contact surface 13, which is a horizontal surface, can be transitioned to the original vertical surface of the outer periphery of the pressing knife body 10 by an arc.

[0057] The second rounded corner structure 17 can further increase the contact area between the pressing contact surface 13 and the material sheet, reducing the risk of indentation at the corner of the pressing contact surface 13.

[0058] In one embodiment, the first rounded corner structure 14 includes a plurality of slopes 141; the plurality of slopes 141 are adjacent to each other in a smooth transition along a first direction.

[0059] Specifically, the slope 141 can be an arc surface or a combination of an arc surface and a plane. For example, the slope 141 closest to the pressing contact surface 13 is an arc surface, while the other slopes 141 are planes. By configuring the first rounded corner structure 14 as multiple adjacent slopes 141, it is easier to process the first rounded corner structure 14 in the actual production process.

[0060] In one embodiment, see Figure 3A groove 15 is provided on the pressing contact surface 13.

[0061] The inventors have discovered that in practical applications, due to process requirements such as applying adhesive or printing frames on the sheet material, localized protrusions may occur on the sheet material. The groove 15 allows the pressing contact surface 13 to avoid contact with the protruding parts on the sheet material. Correspondingly, the groove 15 is positioned to correspond to the locations where protrusions may occur on the sheet material during the actual manufacturing process.

[0062] Furthermore, the groove edge of the groove 15 is provided with a groove chamfer structure 151 to reduce the pressure between the groove edge of the groove 15 and the material sheet.

[0063] In one embodiment, see Figure 1 , Figure 3 and Figure 5 The pressure knife body 10 includes multiple pressure knife bodies 10; the multiple pressure knife bodies 10 have the same shape, or the pressing contact surfaces 13 of the multiple pressure knife bodies 10 have different shapes.

[0064] Specifically, such as Figure 1 As shown, Figure 1 The clamping contact surface 13 of the clamping body 10 shown is configured as a near-rectangular surface. For example... Figure 3 As shown, Figure 3 The pressing contact surface 13 of the pressure knife body 10 shown in the figure is configured as a near right-angled trapezoidal surface.

[0065] In one embodiment, the pressing contact surfaces 13 of the plurality of pressing bodies 10 can all be configured as right-angled trapezoidal surfaces, and the inclined side of the pressing contact surface 13 is located on the side near the middle region of the material sheet, so as to reduce the contact area between the pressing contact surface 13 and the middle region of the material sheet.

[0066] In one embodiment, the pressure knife body 10 is provided with a detection hole 16; the detection hole 16 is disposed through the pressing contact surface 13. When there are multiple pressure knife bodies 10, the detection hole 16 can be provided on some of the pressure knife bodies 10, or the detection hole 16 can be provided on all of the pressure knife bodies 10.

[0067] The detection hole 16 allows optical inspection equipment to perform inspections, enabling the equipment to detect the compaction state of the material sheet through the detection hole 16.

[0068] Specifically, optical inspection using an inspection hole 16 is an existing technology. For example, after the pressure knife body 10 presses the sheet, the optical inspection device can acquire an overall image of the pressing area between the pressure knife body 10 and the sheet, as well as a partial image of the sheet within the inspection hole 16. When the pressure knife body 10 is not fully pressing the sheet, the sheet may be compressed, wrinkled, or otherwise damaged. Therefore, the optical inspection device can determine whether the sheet is properly pressed using the aforementioned overall and partial images.

[0069] Furthermore, a chamfered structure 161 is provided on the outer periphery of the detection hole 16. Both the chamfered structure 161 and the aforementioned groove chamfered structure 151 can be rounded corner structures with chamfers made along the first direction.

[0070] The chamfered structure 161 of the detection hole can reduce the pressure on the material sheet from the outer periphery of the detection hole 16.

[0071] Please see Figures 1 to 5 The second aspect of this application provides a stacking platform, including: a stacking platform body 20, a material box 30, and a pressure knife for preventing indentation as described in any of the above embodiments; the stacking platform body 20 is used for feeding sheet stacking; the pressure knife body 10 of the pressure knife for preventing indentation is disposed on the stacking platform body 20; the material box 30 is used for storing sheet, and the material box 30 is disposed on the side of the stacking platform body 20.

[0072] Specifically, in this embodiment, the stacking platform 20 may be equipped with the aforementioned pressing drive mechanism, which drives the pressing knife body 10 to perform a pressing action. The material box 30 can store material sheets and feeds the stacking platform 20 with material through the feeding port of the stacking platform 20.

[0073] In one embodiment, the system further includes a material box driving mechanism 40. The material box driving mechanism 40 is connected to the material box 30 and is used to drive the material box 30 to move horizontally to align with or avoid the loading port of the stacking platform body 20. The direction in which the material box driving mechanism 40 drives the material box 30 to move can be... Figure 5 The X-axis direction is shown in the figure.

[0074] Specifically, during the stacking process, in addition to the material box 30 providing material sheets to the stacking platform 20, there may also be situations where other items need to be moved onto the stacking platform 20, such as moving stacked semi-finished products onto the stacking platform 20. The material box drive mechanism 40 can drive the material box 30 to avoid feeding other items, improving the convenience of feeding.

[0075] The above are merely preferred embodiments of this application and are not intended to limit the present invention. Although the present application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pressure cutter for preventing indentation, characterized in that, include: Pressing knife body (10); The pressure knife body (10) includes a connecting end (11) and a pressing end (12). The pressure knife body (10) has a pressing contact surface (13) for contacting the material sheet. The pressing contact surface (13) is provided with a first rounded corner structure (14) near the edge of the pressing end (12). The pressure knife body (10) includes a first surface (101) located in the horizontal plane and a second surface (102) located in the vertical plane. The first rounded corner structure (14) is disposed along the first surface (101) toward the second surface (102).

2. The pressure cutter for preventing indentation according to claim 1, characterized in that, The end corner of the pressing contact surface (13) near the pressing end (12) is provided with a second rounded corner structure (17). The second rounded corner structure (17) extends along the first surface (101) toward the second surface (102); The second rounded corner structure (17) is smoothly connected to the first rounded corner structure (14).

3. The pressure knife for preventing indentation according to claim 1, characterized in that, The first rounded corner structure (14) includes multiple slopes (141); The plurality of said slopes (141) are adjacent to each other in a smooth transition along the thickness direction of the pressing body (10).

4. The pressure knife for preventing indentation according to claim 1, characterized in that, The pressing contact surface (13) is provided with a groove (15).

5. The pressure cutter for preventing indentation according to claim 4, characterized in that, The groove (15) has a groove chamfer structure (151) along its groove edge.

6. The indenter for preventing indentation according to any one of claims 1 to 5, characterized in that, The pressing knife body (10) includes multiple components; The multiple pressure knife bodies (10) have the same shape, or the pressing contact surfaces (13) of the multiple pressure knife bodies (10) have different shapes.

7. The pressure cutter for preventing indentation according to claim 6, characterized in that, The pressure knife body (10) is provided with a detection hole (16); The detection hole (16) is disposed through the pressing contact surface (13).

8. The pressure cutter for preventing indentation according to claim 7, characterized in that, The outer periphery of the detection hole (16) is provided with a detection hole chamfer structure (161).

9. A stacking platform, characterized in that, include: Stacking table body (20), material box (30) and pressure knife for preventing indentation as described in any one of claims 1 to 8; The stacking platform (20) is used for stacking feed sheets; The pressure knife body (10) of the pressure knife used for preventing indentation is disposed on the stacking body (20); The material box (30) is used to store the material sheet, and the material box (30) is located on the side of the stacking platform body (20).

10. The stacking platform according to claim 9, characterized in that, Also includes: Material box drive mechanism (40); The material box drive mechanism (40) is connected to the material box (30) and is used to drive the material box (30) to move in the horizontal direction to align with the loading port of the stacking body (20) or avoid the loading port of the stacking body (20).

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