Pole piece extension spacer bush, pole piece rolling device and pole piece processing equipment
By designing an extension spacer for the pole rolling device, the problems of inconsistent stretching and wear of the pole sheet in the prior art are solved, and uniform extension and efficient processing of the pole sheet white space area are achieved.
Patent Information
- Application Number
- CN202420776644.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-04-15
AI Technical Summary
In the existing electrode sheet production process, when using Teflon for rolling, it is easy to cause wear, inconsistent stretching, and lead to problems such as folding of the ear or breaking of the belt.
A pole sheet extension spacer is designed, including a main body being arranged on the flattening roller of the pole sheet roll pressing device through a mounting hole sleeve, and interfering with the flattening roller to achieve the extension of the white space area of the pole sheet.
The positioning accuracy of the spacer and flattening roller is improved, the surface wear of the spacer is reduced, the tensile extension consistency of the white space of the pole sheet is ensured, and the situation of the pole ear folding or the strip breakage is reduced.
Smart Images
Figure CN222562692U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pole piece processing, in particular to a pole piece extension spacer, a pole piece rolling device and pole piece processing equipment. Background Art
[0002] Battery pole pieces are important components of power batteries, such as lithium-ion batteries. Pole pieces include a coating area coated with active materials and a blank area not coated with active materials. In the production process of pole pieces, the blank area needs to be stretched to a preset thickness, and then the pole ears are cut in the blank area for subsequent battery production.
[0003] However, in the existing electrode manufacturing process, Teflon is generally used to perform layered staggered pasting and tension stretching on the inlet and outlet flattening rollers to extend the tabs in the blank area of the rolled electrode. This method is prone to Teflon wear, and there are differences in the stretching of the blank area of the electrode. In addition, the accuracy of Teflon pasting is low, and the stretching and extension of the blank area of the electrode are inconsistent. The blank area is prone to over-extension, resulting in the tabs folding after cutting or the tape breaking before cutting. Utility Model Content
[0004] In view of the above problems, the present utility model is proposed to provide a pole piece extension spacer, a pole piece rolling device and a pole piece processing equipment that overcome the above problems or at least partially solve the above problems.
[0005] Based on the first aspect of the utility model, a pole piece extension spacer is provided, the spacer comprises a main body, a mounting hole is provided on the main body, and the cross-sectional shape of the main body is a circular tube structure, wherein the main body is sleeved on the flattening roller of the pole piece rolling device through the mounting hole, and the main body is interference fit with the flattening roller to extend the pole piece blank area located on the flattening roller.
[0006] An optional utility model content, the main body includes a base portion, and the base portion is interference fit with the flattening roller.
[0007] An optional utility model content, the main body includes a main part and an extension part extending axially along the main part, the extension part is arranged on the end of the main part, wherein the inner diameter of the extension part is smaller than the inner diameter of the main part, so that the extension part and the flattening roller have an interference fit.
[0008] An optional utility model content, when the number of the extension parts is two, the two extension parts are respectively arranged on the two ends of the main part.
[0009] An optional utility model content, the inner surface of the axial cross-section formed by the main part and the extension part is stepped.
[0010] An optional utility model content, the thickness range between the inner diameter of the extension part and the outer diameter of the main part is 120-450μm.
[0011] An optional utility model content, the main part and the extension part are an integrated structure.
[0012] An optional utility model content, the main body is made of silicone material.
[0013] Based on the second aspect of the utility model, a pole piece rolling device is also provided, which comprises a flattening roller and a pole piece extension spacer as described in any one of the above utility models, and the pole piece extension spacer is interference fit with the flattening roller.
[0014] Based on the third aspect of the utility model, a pole piece processing equipment is also provided, and the pole piece processing equipment includes the pole piece rolling device as described in the above utility model.
[0015] Compared with the prior art, the utility model includes a main body, a mounting hole is provided on the main body, and the cross-sectional shape of the main body is a circular tube structure, wherein the main body is sleeved on the flattening roller of the pole piece rolling device through the mounting hole, and the main body and the flattening roller are interference fit to extend the pole piece blank area located on the flattening roller. This can improve the positioning accuracy of the spacer and the flattening roller, reduce the surface wear of the spacer, and thus ensure the consistency of the stretching and extension of the pole piece blank area.
[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.
[0018] In the attached picture:
[0019] Figure 1 It is a structural schematic diagram of a pole piece rolling device provided by an embodiment of the utility model;
[0020] Figure 2 It is a structural schematic diagram of a pole piece extension spacer provided in an embodiment of the utility model;
[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of another pole piece extension spacer provided in an embodiment of the utility model;
[0022] Figure 4 The utility model embodiment provides Figure 3 A schematic cross-sectional view of the section cut along the axial direction;
[0023] Figure 5 This is a structural schematic diagram of another pole piece extension spacer provided in an embodiment of the utility model;
[0024] Figure 6 It is a structural schematic diagram of a pole piece processing equipment provided by an embodiment of the utility model;
[0025] Figure numerals: 1. main body; 101. main part; 102. extension part; 103. mounting hole; 2. flattening roller; 3. pole piece blank area; 4. pole piece coating area; 5. rolling roller. DETAILED DESCRIPTION
[0026] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0027] Battery pole pieces are important components of power batteries, such as lithium-ion batteries. Pole pieces include a coating area coated with active materials and a blank area not coated with active materials. In the production process of pole pieces, the blank area needs to be stretched to a preset thickness, and then the pole ears are cut in the blank area for subsequent battery production.
[0028] However, in the existing electrode manufacturing process, Teflon is generally used to perform layered staggered pasting and tension stretching on the inlet and outlet flattening rollers to extend the tabs in the blank area of the rolled electrode. This method is prone to Teflon wear, and there are differences in the stretching of the blank area of the electrode. In addition, the accuracy of Teflon pasting is low, and the stretching and extension of the blank area of the electrode are inconsistent. The blank area is prone to over-extension, resulting in the tabs folding after cutting or the tape breaking before cutting.
[0029] In order to solve the above technical problems, the embodiment of the utility model provides a pole piece extension spacer, a pole piece rolling device and a pole piece processing equipment. The embodiment of the utility model includes a main body 1, a mounting hole 103 is opened on the main body 1, and the cross-sectional shape of the main body 1 is a circular tube structure, wherein the main body 1 is sleeved on the flattening roller 2 of the pole piece rolling device through the mounting hole 103, and the main body 1 and the flattening roller 2 are interference fit to extend the pole piece blank area 3 located on the flattening roller 2. Thereby, the positioning accuracy of the spacer and the flattening roller 2 can be improved, and the surface wear of the spacer can be reduced, so as to ensure the consistency of the stretching and extension of the pole piece blank area 3.
[0030] Reference Figure 1 As shown, the embodiment of the utility model further discloses a pole piece rolling device, the device comprising a flattening roller 2 and a pole piece extension spacer as described in any one of the following utility model embodiments, the pole piece extension spacer and the flattening roller 2 are interference fit. The pole piece extension spacer is located in the pole piece blank area 3 of the pole piece to extend the pole piece blank area 3 located on the flattening roller 2. In this way, the positioning accuracy of the spacer and the flattening roller 2 can be improved, and the surface wear of the spacer can be reduced, so that the consistency of the stretching and extension of the pole piece blank area 3 can be ensured.
[0031] The flattening roller 2 may be an inward flattening roller 2, or an outward flattening roller 2, or the flattening roller 2 may be multiple, including an inward flattening roller 2 and an outward flattening roller 2. The inward flattening roller 2 is located in front of the roller (i.e., on the side where the pole piece enters the roller), and the outward flattening roller 2 is located behind the roller (i.e., on the side where the pole piece exits the roller). The pole piece extension spacer is aligned with the pole piece blank area 3, and its outer diameter is larger than the outer diameter of the flattening roller 2, so that tension is generated on the pole piece blank area 3, and the pole piece blank area 3 is stretched and extended. In this way, the extension degree of the pole piece blank area 3 can be kept consistent with that of the pole piece coating area after rolling, so that the extension consistency of the produced pole piece can be high. It also reduces the situation of the pole ear folding after the pole piece is cut or the belt breaking before cutting, and improves the production qualification rate of subsequent power batteries.
[0032] Reference Figure 2-5 The embodiment of the utility model provides a pole piece extension spacer, which may include a main body 1, a mounting hole 103 is provided on the main body 1, and the cross-sectional shape of the main body 1 is a circular tube structure, wherein the main body 1 is sleeved on the flattening roller 2 of the pole piece rolling device through the mounting hole 103, and the main body 1 is interference fit with the flattening roller 2 to extend the pole piece blank area 3 located on the flattening roller 2. In this way, the positioning accuracy of the spacer and the flattening roller 2 can be improved, and the surface wear of the spacer can be reduced, so as to ensure the consistency of the stretching and extension of the pole piece blank area 3.
[0033] In the embodiment of the utility model, the main body 1 can be a cylindrical structure, and a mounting hole 103 for the flattening roller 2 to pass through can be opened on the main body 1, wherein the mounting hole 103 is centered on the central axis of the main body 1 and completely penetrates the main body 1 along the axial direction of the main body 1, thereby, the cross-sectional shape of the main body 1 is a circular tube structure. And the tube wall thickness of the main body 1 on the cross section is consistent everywhere. Therefore, it can be ensured that after the main body 1 and the flattening roller 2 are interference-fitted, the outer diameter of the main body 1 is the same everywhere, thereby improving the consistency of the stretching extension of the spacer to the blank area 3 of the pole piece.
[0034] For example, the main body 1 may be made of an elastic material, and when no external force is applied to the main body 1, the diameter of the mounting hole 103 is smaller than that of the flattening roller 2. When the main body 1 and the flattening roller 2 are assembled, the main body 1 may be deformed to enlarge the diameter of the mounting hole 103. When the main body 1 is sleeved on the flattening roller 2 and moved to a position corresponding to the blank space of the pole piece, the deformation of the main body 1 is restored, thereby achieving an interference fit between the main body 1 and the flattening roller 2.
[0035] An optional utility model embodiment, referring to Figure 2 As shown, the main body 1 includes a main portion 101 , and the main portion 101 is interference fit with the flattening roller 2 .
[0036] In the embodiment of the utility model, the main body 1 may include a main part 101 , wherein the mounting hole 103 is opened on the main part 101 , and an interference fit is formed with the flattening roller 2 through the main part 101 .
[0037] In another optional utility model embodiment, referring to Figure 3-5 As shown, the main body 1 includes a main part 101 and an extension part 102 extending axially along the main part 101, and the extension part 102 is arranged on the end of the main part 101, wherein the inner diameter of the extension part 102 is smaller than the inner diameter of the main part 101, so that the extension part 102 and the flattening roller 2 have an interference fit.
[0038] In the embodiment of the utility model, the main body 1 may further include a main part 101 and an extension part 102 extending along the axial direction of the main part 101, wherein the inner diameter of the extension part 102 is smaller than the inner diameter of the main part 101, that is, the diameter corresponding to the mounting hole 103 in the extension part 102 is smaller than the diameter corresponding to the mounting hole 103 in the main part 101. Therefore, when the main body and the flattening roller 2 are assembled, the extension part 102 forms an interference fit with the flattening roller 2.
[0039] Compared with the above-mentioned main body 1 having only the main part 101, the embodiment of the utility model can form an interference fit with the flattening roller 2 through the extension part 102, so as to reduce the contact area between the main body and the flattening roller 2. Therefore, when the thickness of the main body is relatively thick, the difficulty of deformation of the main body can be avoided, thereby reducing the difficulty of assembling the main body and the flattening roller 2. Among them, the main part 101 is directly opposite to the pole piece blank area 3, and is consistent with the length of the pole piece blank area 3 in the longitudinal direction, and the outer diameter of the extension part 102 is smaller than the outer diameter of the main part 101, so as to avoid secondary stretching and extension of the rolled pole piece coating area 4.
[0040] An optional utility model embodiment, referring to Figure 5 As shown, when there are two extending portions 102 , the two extending portions 102 are respectively disposed on two ends of the main portion 101 .
[0041] In the embodiment of the utility model, the number of the extension parts 102 is at most two, that is, the number of the extension parts 102 can be one or two. In the case of providing one extension part 102, the extension part 102 can be provided on one end of the main part 101 (it can be on the left end or on the right end). In the case of providing two extension parts 102, the two extension parts 102 can be fixed on the two ends of the main part 101, respectively. Thus, the extension parts 102 can form an interference fit with the flattening roller 2, respectively, so as to improve the consistency of the stretching extension of the main part 101 to the blank area 3 of the electrode sheet.
[0042] An optional utility model embodiment, referring to Figure 4 and Figure 5 As shown, the inner surface of the axial cross section formed by the main portion 101 and the extension portion 102 is stepped.
[0043] In the embodiment of the utility model, the axial cross section can be understood as a cross section formed along the central axis of the main part 101 (it can also be understood as a cross section formed along the central axis of the extension part 102). The inner surface of the axial cross section is stepped, which can be understood as the axial cross section shape of the extension part 102 is at least one layer of stepped. That is to say, the extension part 102 can be a tubular structure with a consistent inner diameter, or the inner diameter of the extension part 102 can be reduced at intervals from the end close to the main part 101 to the direction away from the main part 101. For example, the inner diameter of the main part 101 is r3, the inner diameter of the partial area of the extension part 102 close to the main part 101 is r2, and the inner diameter of the area of the extension part 102 away from the main part 101 is r1, so r3 is greater than r2, and r2 is greater than r1. As a result, the inner surface of the axial cross section of the extension part 102 is multi-layer stepped.
[0044] In the embodiment of the utility model, the inner surface of the axial cross section of the extension portion 102 can be determined to have several layers of steps according to actual design requirements, for example, it can be 1 layer and 2 layers, etc. And the area with the smallest inner diameter of the extension portion 102 can form an interference fit with the flattening roller 2 to reduce the contact area between the main body and the flattening roller 2. Therefore, when the thickness of the main body is thick, the difficulty of deformation of the main body can be avoided, thereby reducing the difficulty of assembling the main body and the flattening roller 2. Among them, the main part 101 is directly opposite to the pole piece blank area 3, and is consistent with the length of the pole piece blank area 3 in the longitudinal direction. The outer diameter of the extension portion 102 is smaller than the outer diameter of the main part 101, so as to avoid secondary stretching and extension of the rolled pole piece coating area 4.
[0045] An optional utility model embodiment, referring to Figure 4 As shown, the thickness range between the inner diameter of the extension portion 102 and the outer diameter of the main portion 101 is 120-450 μm.
[0046] In the embodiment of the utility model, considering the conventional extension thickness of the pole piece coating area 4, the total thickness h1 between the inner diameter of the extension portion 102 (which can also be understood as the minimum inner diameter of the extension portion 102) and the outer diameter of the main body 101 is 120-450 μm (micrometer). For example, the total thickness between the inner diameter of the extension portion 102 and the outer diameter of the main body 101 can be 120 microns, 150 microns, 240 microns, 360 microns and 450 microns, etc. It can be selected according to the extension thickness of the pole piece coating area 4, and no excessive restrictions are made here. Thereby, the consistency of the tensile extension of the pole piece coating area 4 and the pole piece blank area 3 can be improved, and the subsequent production yield of the power battery can be further improved. In some embodiments, there may be a difference between the thickness of the extension portion 102 and the thickness of the main body 101.
[0047] In an optional embodiment of the utility model, the main portion 101 and the extension portion 102 are an integrated structure.
[0048] In an embodiment of the utility model, the main part 101 and the extension part 102 can be an integrated structure, that is, the main part 101 and the extension part 102 can be processed and formed using the same material, thereby improving the concentricity of the main part 101 and the extension part 102, and further improving the consistency of the stretching and extension of the blank area 3 of the pole piece by the spacer.
[0049] In an optional embodiment of the utility model, the main body 1 is made of silicone material.
[0050] In the embodiment of the utility model, the main body 1 made of silicone material has the advantages of good elasticity and good wear resistance, and on the basis of facilitating the interference fit between the main body 1 and the flattening roller 2, the surface can be kept smooth and not prone to wear during the long-term stretching and extension process with the blank area 3 of the pole piece. Therefore, the over-extension of the blank area 3 of the pole piece can be reduced, resulting in the folding of the pole ear after cutting or the breaking of the belt before cutting.
[0051] Reference Figure 6 As shown, the embodiment of the utility model further discloses a pole piece processing equipment, and the pole piece processing equipment may include the pole piece rolling device as described in the above utility model embodiment. The pole piece processing equipment may also include elements such as rollers and guide rollers. The rollers, guide rollers and the pole piece rolling device are respectively installed on the equipment mounting seat, so that during the processing of the pole piece, the movement direction of the pole piece is limited by the guide roller, and the pole piece is sliced by the roller.
[0052] In summary, the embodiment of the utility model discloses a pole piece extension spacer, a pole piece rolling device and a pole piece processing equipment. The embodiment of the utility model includes a main body 1, a mounting hole 103 is provided on the main body 1, and the cross-sectional shape of the main body 1 is a circular tube structure, wherein the main body 1 is sleeved on the flattening roller 2 of the pole piece rolling device through the mounting hole 103, and the main body 1 is interference fit with the flattening roller 2 to extend the pole piece blank area 3 located on the flattening roller 2. Thereby, the positioning accuracy of the spacer and the flattening roller 2 can be improved, and the surface wear of the spacer can be reduced, so as to ensure the consistency of the stretching and extension of the pole piece blank area 3.
[0053] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0054] It is easy for a person skilled in the art to think that any combination of the above embodiments is feasible, so any combination of the above embodiments is an implementation scheme of the present utility model. However, due to space limitations, this specification will not describe them in detail here.
[0055] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.
[0056] Similarly, it should be understood that in order to simplify the present invention and help understand one or more of the various aspects of the present invention, in the above description of exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof.
[0057] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.
Claims
1. A pole piece extension spacer, characterized in that: The spacer comprises a main body (1), a mounting hole (103) is provided on the main body (1), and the cross-sectional shape of the main body (1) is a circular tube structure, wherein the main body (1) is sleeved on a flattening roller (2) of a pole piece rolling device through the mounting hole (103), and the main body (1) and the flattening roller (2) are interference fit to extend a pole piece blank area (3) located on the flattening roller (2).
2. The pole piece extension spacer according to claim 1, characterized in that: The main body (1) comprises a main part (101), and the main part (101) is interference fit with the flattening roller (2).
3. The pole piece extension spacer according to claim 1, characterized in that: The main body (1) comprises a main part (101) and an extension part (102) extending axially along the main part (101), wherein the extension part (102) is arranged on the end of the main part (101), wherein the inner diameter of the extension part (102) is smaller than the inner diameter of the main part (101), so that the extension part (102) and the flattening roller (2) are interference fit.
4. The pole piece extension spacer according to claim 3, characterized in that: When there are two extension portions (102), the two extension portions (102) are respectively arranged on two ends of the main portion (101).
5. The pole piece extension spacer according to claim 3, characterized in that: The inner surface of the axial cross section formed by the main portion (101) and the extension portion (102) is in a stepped shape.
6. The pole piece extension spacer according to claim 3, characterized in that: The thickness range between the inner diameter of the extension part (102) and the outer diameter of the main part (101) is 120-450 μm.
7. The pole piece extension spacer according to claim 3, characterized in that: The main part (101) and the extension part (102) are an integrated structure.
8. The pole piece extension spacer according to claim 3, characterized in that: The main body (1) is made of silicone material.
9. A pole piece rolling device, characterized in that: The device comprises a flattening roller (2) and a pole piece extension spacer as claimed in any one of claims 1 to 8, wherein the pole piece extension spacer is interference fit with the flattening roller (2).
10. A pole piece processing device, characterized in that: The pole piece processing equipment includes the pole piece rolling device as described in claim 9.