Roller passing mechanism and pole piece shaping device
By setting a spiral structure on the pressure roller, the deformation problem caused by uneven force during the winding process of the electrode sheet is solved, achieving a more efficient electrode sheet shaping effect and improving the stability of the winding process and the flatness of the electrode sheet.
Patent Information
- Application Number
- CN202520068223.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-13
AI Technical Summary
In existing technologies, uneven stress during the winding process can cause the electrode sheet to deform and twist, affecting the winding overhang and preventing the negative electrode from covering the positive electrode, posing a risk of defects. Furthermore, traditional pressure rollers have poor shaping effects.
Design a roller-passing mechanism that uses two opposing pressure rollers and a spiral structure on the pressure rollers so that they mesh with each other. The spiral structure provides bidirectional force to shape the electrode sheet. The spiral structure includes protrusions and recesses, the spiral angle is ≥60°, and the meshing gap is 1.0-1.5 times the electrode sheet thickness.
It improves the shaping stability and flatness of the electrode sheets, reduces electrode deformation, avoids adverse risks, and enhances the stability of the winding process.
Smart Images
Figure CN223669923U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field, and more specifically, relate to a kind of battery pole piece's over roller mechanism and shaping device. BACKGROUND
[0002] Battery monomers are widely used in electronic devices, such as mobile phones, laptops, electric cars, electric cars, electric planes, electric ships, electric toy cars, electric toy ships, electric toy planes and electric tools, etc. Battery monomers can include cadmium-nickel battery monomers, hydrogen-nickel battery monomers, lithium-ion battery monomers and secondary alkaline zinc-manganese battery monomers, etc.
[0003] In the production process of the pole piece of the battery monomer, improving the pole piece rate has always been the research direction in the field. During winding, the key control point is the stability control of the material line. After coating, baking and rolling, the pole piece will be deformed and twisted to different degrees, and the continuous accumulation of deformation and twisting will result in displacement of the pole piece due to the roller pressure during winding, which will cause the material line to deviate, and then affect the winding overhang (the part of the negative pole piece that exceeds the positive and negative pole pieces in length and width direction), which may cause the negative pole to be unable to cover the positive pole, and there is a certain risk of failure.
[0004] Currently, the shaping of the pole piece is generally realized by two cylindrical pressure rollers, which extrude the pole piece to shape it. The flatness of the pole piece processed by this method is relatively poor and needs to be further improved. UTILITY MODEL CONTENT
[0005] The main purpose of the utility model is to provide an over roller mechanism and a pole piece shaping device to solve the technical problems mentioned in the background art.
[0006] To solve the above technical problems, on the one hand, an over roller mechanism is proposed, which comprises:
[0007] Two oppositely arranged pressure rollers;
[0008] And a spiral structure is arranged on the two pressure rollers to enable the two pressure rollers to mesh with each other.
[0009] Each spiral structure includes two groups and is symmetrically arranged on both sides of each pressure roller to make the spiral directions of the two groups of spiral structures opposite.
[0010] In the above technical solution, further, the spiral structure comprises:
[0011] A protruding spiral part is arranged along the axial direction of one of the pressure rollers.
[0012] and a concave spiral part arranged in the axial direction of the other compression roller;
[0013] The convex spiral parts are arranged in the circumferential direction of the compression roller, and the number of the concave spiral parts corresponds to the number of the convex spiral parts, so that the two compression rollers can engage with each other.
[0014] In any of the above technical solutions, further, the number of the convex spiral parts is N, and N is a positive integer greater than or equal to 6.
[0015] In any of the above technical solutions, further, the spiral angle β of the spiral structure is an acute angle greater than or equal to 60°.
[0016] In any of the above technical solutions, further, the side surfaces of adjacent convex spiral parts are sequentially connected, and the side surfaces of adjacent concave spiral parts are sequentially connected.
[0017] In any of the above technical solutions, further, the opposite ends of the two groups of spiral structures are connected.
[0018] In any of the above technical solutions, further, the engagement gap between the two compression rollers is 1.0-1.5 times the thickness of the profiled object.
[0019] In any of the above technical solutions, further, the engagement gap between the two compression rollers is 110-200 μm.
[0020] In any of the above technical solutions, further, the compression roller comprises:
[0021] a base roller;
[0022] and a rubber roller sleeved on the base roller;
[0023] The spiral structure is arranged on the rubber roller.
[0024] In another aspect, an electrode sheet shaping device is also provided, which comprises the roller mechanism in any of the above solutions.
[0025] After the electrode sheet passes through the gap between the two compression rollers, the electrode sheet is rolled and shaped by the two groups of spiral structures.
[0026] Advantages: Compared with the prior art, the spiral structure is arranged on the traditional flat compression roller, so that the two compression rollers can engage with each other. After the electrode sheet passes through the gap between the two compression rollers, the corrugated surface of the compression roller provides bidirectional force. Compared with the traditional flat compression roller, an additional force is provided in the direction of the concave surface or the convex surface, so that the shaping of the electrode sheet is more stable and effective. BRIEF DESCRIPTION OF DRAWINGS
[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only constitute some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0028] Figure 1 is a three-dimensional structural schematic diagram of the present application;
[0029] Figure 2 is a sectional structural schematic diagram of the present application.
[0030] The following is the explanation of the reference signs:
[0031] 1, compression roller; 11, base roller; 12, rubber roller; 101, upper roller; 102, lower compression roller; 2, spiral structure; 21, convex spiral part; 22, concave spiral part. DETAILED DESCRIPTION
[0032] The following will describe the example embodiments according to the present application in detail with reference to the drawings. Obviously, the described embodiments only constitute some of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described here. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0033] It should be noted that, as shown in the present application and claims, unless the context clearly indicates otherwise, "one", "a", "an", and / or "the" do not specifically refer to the singular, but also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.
[0034] If the present application embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.
[0035] In the utility model, unless another definite provision and limitation, the terms "connect", "fix" and the like should be understood broadly, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirect connection through intermediate medium, can be the intercommunication of two elements or the interaction of two elements, unless another definite limitation. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.
[0036] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on that ordinary skilled in the art can realize, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.
[0037] Embodiment one:
[0038] As shown in Figure 1 And Figure 2 In the embodiment, a roller mechanism includes: two oppositely arranged compression rollers 1, and a spiral structure 2 arranged on the two compression rollers 1, so that the two compression rollers 1 can mesh with each other.
[0039] Each spiral structure 2 includes two groups and is symmetrically arranged on both sides of each compression roller 1, so that the spiral directions of the two groups of spiral structures 2 are opposite.
[0040] For the shaping of the pole piece, the spiral structure 2 is arranged on the traditional flat compression roller 1, so that the two compression rollers 1 can mesh with each other. After the pole piece passes through the gap between the two compression rollers 1, the corrugated surface on the compression roller 1 will provide a bidirectional force. Compared with the traditional flat compression roller 1, an additional force along the concave or convex direction is provided, and the shaping of the pole piece is more stable and effective.
[0041] Since the pole piece has a certain wrinkle at the middle position in the manufacturing process, in order to further improve the shaping effect, the whole pole piece can be subjected to tension. For this purpose, the application is provided with two spiral structures 2, and the spiral directions of the two spiral structures 2 are oppositely arranged. When the pole piece passes through the two compression rollers 1, one of the compression rollers 1 rotates clockwise, giving the pole piece an inward converging force from the outside to the inside (from both ends to the middle), and the other compression roller 1 rotates counterclockwise, giving the pole piece an outward expanding force from the inside to the outside (from the middle to both ends). The two compression rollers 1 shape the pole piece under a certain pressure through opposite forces.
[0042] In the embodiment, the spiral structure 2 includes a convex spiral part 21 arranged along the axial direction of one of the compression rollers 1 and a concave spiral part 22 arranged along the axial direction of the other compression roller 1.
[0043] The convex spiral part 21 has a plurality of parts and is distributed along the circumferential direction of the compression roller 1. The number of the concave spiral part 22 is consistent with the number of the convex spiral part 21 and corresponds one-to-one, so that the two compression rollers 1 can mesh with each other.
[0044] The spiral structure 2 is mainly composed of the convex spiral part 21 and the concave spiral part 22. Specifically, the convex spiral part 21 is provided on the surface of one of the compression rollers 1, and the concave spiral part 22 is provided on the surface of the other compression roller 1, so that the two compression rollers 1 can mesh with each other.
[0045] In the embodiment, the two compression rollers 1 are arranged in an upper and lower manner and are divided into an upper compression roller 101 and a lower compression roller 102. As for the convex spiral part 21 and the concave spiral part 22, whether they are arranged on the upper compression roller 101 or the lower compression roller 102 is not limited, as long as the two compression rollers can mesh with each other.
[0046] It should be noted that the degree of fluctuation on the compression roller 1 directly affects the deformation of the pole piece. If the degree of fluctuation is too large, the pole piece will have an irreversible deformation. Therefore, the spiral structure 2 needs to be limited.
[0047] Specifically, the number of the convex spiral part 21 is set to N, and N is a positive integer greater than or equal to 6. The spiral angle β of the spiral structure 2 is an acute angle greater than or equal to 60°. This setting can make the degree of fluctuation of the pole piece relatively small when it passes through the compression roller 1, which not only can more effectively shape the pole piece, but also will not damage the pole piece.
[0048] Embodiment Two
[0049] The embodiment is a further improvement based on Embodiment One.
[0050] As Figure 1 and Figure 2As shown, in this embodiment, the shaping effect on the pole piece is affected by the contact area between the pole piece and the spiral structure 2 on the compression roller 1. The greater the contact area, the greater the force area of the pole piece, and the more excellent the shaping effect. Therefore, the side surfaces of the adjacent convex spiral portions 21 are sequentially connected, the side surfaces of the adjacent concave spiral portions 22 are sequentially connected, and the opposite ends of the two groups of spiral structures 2 are connected, so that the convex spiral portions 21 on both sides of the compression roller 1 are sequentially connected to each other, and the concave spiral portions 22 on both sides of the compression roller 1 are sequentially connected to each other. After such arrangement, the entire pole piece is in contact with the spiral structure, and the pole piece is pulled and straightened under the action of the convex spiral portions 21 and the concave spiral portions 22.
[0051] It should be noted that, in order to ensure the uniformity of the force on the pole piece, the spiral structure 2 is a central symmetric structure, that is, the spiral structure 2 on the compression roller 1 is continuous, for example, the spiral direction of the spiral structure 2 on the compression roller 1 from one end to the other end is clockwise to the middle, and then counterclockwise to the other end, or first counterclockwise to the middle, and then counterclockwise to the other end.
[0052] Embodiment Three:
[0053] This embodiment is a further improvement based on any of the above embodiments.
[0054] As shown in Figure 1 and Figure 2 In this embodiment, in order to ensure the pressure between the two compression rollers 1 acting on the thickness of the shaped object, the meshing gap between the two compression rollers 1 is set to 1.0-1.5 times the thickness of the shaped object, specifically, about twice the thickness of the shaped object.
[0055] This application is mainly used for shaping the pole piece, so the meshing gap between the two compression rollers 1 is 110-200 μm.
[0056] It should be noted that the present application is not limited to the shaping of the pole piece, but can also be used for other thin plate (sheet) shaped objects.
[0057] Embodiment Four:
[0058] This embodiment is a further improvement based on any of the above embodiments.
[0059] As shown in Figure 1 and Figure 2 In this embodiment, the compression roller 1 comprises a base roller 11 and a rubber roller 12 sleeved on the base roller 11.
[0060] The spiral structure 2 is arranged on the rubber roller 12.
[0061] The pressure roller 1 is composed of a base roller 11 and a rubber roller 12. The rubber roller 12 is made of soft material similar to silicone rubber, so as to ensure close contact with the pole piece and not easily scratch the pole piece.
[0062] Embodiment five:
[0063] The embodiment provides a pole piece shaping device, which comprises the roller passing mechanism in any of the above embodiments, and wherein the pole piece is rolled and shaped by two groups of spiral structures 2 after passing through the gap between the two pressure rollers 1.
[0064] The above has described the embodiments of the present disclosure, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical application, or improvement of the technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.
Claims
1. A roll-over mechanism, characterized by, The utility model relates to a kind of over roller mechanism, including: Two opposite pressure rollers (1) are arranged; And spiral structure (2) is arranged on two the pressure roller (1), so that two the pressure roller (1) can be engaged with each other; Wherein, each spiral structure (2) includes two groups, and symmetrically arranged on both sides of each pressure roller (1), so that the spiral direction of two groups of spiral structure (2) is opposite.
2. The roll-over mechanism of claim 1, wherein, The spiral structure (2) includes: Convex spiral part (21) is arranged along the axial direction of one of the pressure roller (1); And recessed spiral part (22) is arranged along the axial direction of another pressure roller (1); Wherein, the convex spiral part (21) has multiple, and is distributed along the circumferential direction of pressure roller (1), the number of recessed spiral part (22) is consistent with the number of convex spiral part (21), and one-to-one correspondence, so that two the pressure roller (1) can be engaged with each other.
3. The roll-over mechanism of claim 2, wherein, The number of the convex spiral part (21) is N, and N is the positive integer of ≥6.
4. The roll-over mechanism of claim 3, wherein, The spiral angle β of the spiral structure (2) is ≥60 ° acute angle.
5. The roll-over mechanism of claim 2, wherein, The side surface of adjacent convex spiral part (21) is sequentially connected, and the side surface of adjacent recessed spiral part (22) is sequentially connected.
6. The roll-over mechanism of claim 5, wherein, Two groups of the spiral structure (2) are connected at opposite ends.
7. The roll-over mechanism of claim 1 wherein, The engagement gap between two the pressure roller (1) is 1.0-1.5 times of the thickness of the profile.
8. The roll-over mechanism of claim 1, wherein, The engagement gap between two the pressure roller (1) is 110-200 μm.
9. The roll-over mechanism according to any one of claims 1 to 8, wherein The pressure roller (1) includes: Base roller (11); And rubber roller (12) is sleeved on the base roller (11); Wherein, the spiral structure (2) is arranged on the rubber roller (12).
10. An electrode tab shaping device characterized by, Including the over roller mechanism as claimed in any one of claims 1-9; Wherein, after pole piece passes through the gap between two pressure rollers (1), it is rolled and shaped by two groups of spiral structure (2).