Via roller and roller press

Abstract

The passing roller comprises a roller body, a plurality of auxiliary parts and a plurality of movable parts, the roller body is provided with a mounting groove and a mounting hole, the mounting groove is formed in the circumferential direction of the roller body, and the mounting hole is formed in the bottom of the mounting groove and penetrates through the roller body; the movable parts penetrate through the mounting holes to be connected with the auxiliary parts, and the auxiliary parts protrude out of the circumferential surface of the roller body. In the application, the auxiliary part protrudes out of the circumferential surface of the roller body, and when the pole piece is rolled by the roller, the auxiliary part can be in contact with the empty foil area, so that the empty foil area is also rolled to extend, the inconsistent extension of the coating area and the empty foil area is prevented, and the empty foil area does not generate wrinkles. Meanwhile, the auxiliary part is arranged, so that an adhesive tape does not need to be pasted on the surface of the passing roller, the operation of an operator is facilitated, the time required for rolling the pole piece is saved, and the efficiency of rolling the pole piece is improved.

Description

A roller press and roller mill Technical Field

[0001] This application relates to the field of battery tab manufacturing technology, and in particular to a roller press and roll forming machine. Background Technology

[0002] Roll forming is the most commonly used electrode compaction process. Roll forming can change the pore structure of the electrode and the distribution of the conductive agent, thereby affecting the electrochemical performance of the battery. Because the coated area of ​​the battery electrode is thicker than the uncoated foil area (also known as the tab), during the rolling process, the coated area is stretched by the rolling, while the uncoated foil area, being too thin, is not stretched. This results in inconsistent stretching between the coated and uncoated foil areas, causing wrinkles in the uncoated foil area.

[0003] To eliminate wrinkles in the empty foil area, the existing technology involves manually applying Teflon tape to the roller. However, this process requires aligning the coating boundary line and ensuring that the thickness of the tape is consistent at each position. This process is time-consuming and inconvenient for production. Summary of the Invention

[0004] This application provides a roller and roller press to solve the problem that existing rollers require Teflon tape, which makes production inconvenient.

[0005] This application provides a roller guide, comprising: a roller body, multiple auxiliary components, and multiple movable components. The roller body has a mounting groove and a mounting hole. The mounting groove is arranged along the circumference of the roller body, and the mounting hole is located at the bottom of the mounting groove and extends through the roller body. The movable components pass through the mounting hole and are connected to the auxiliary components. The auxiliary components protrude from the circumferential surface of the roller body.

[0006] In one possible design, the movable part includes a fixed part, a movable part, and a driving part. The fixed part is provided with a receiving cavity, the movable part is slidably connected to the receiving cavity, and the driving part is capable of driving the movable part to slide relative to the receiving cavity.

[0007] In one possible design, the drive unit is disposed within the receiving cavity.

[0008] In one possible design, the drive unit includes a lead screw and a servo motor. A push block is threaded onto the lead screw. When the servo motor drives the lead screw to rotate, the push block moves along the lead screw and pushes the moving part to slide relative to the receiving cavity.

[0009] In one possible design, one of the inner wall of the receiving cavity and the outer periphery of the moving part is provided with a guide protrusion, and the other is provided with a guide groove, wherein the guide protrusion and the guide groove cooperate with each other.

[0010] In one possible design, one of the ends of the moving part away from the driving part and the auxiliary member is provided with a snap-fit ​​protrusion, and the other is provided with a snap-fit ​​recess, wherein the snap-fit ​​protrusion engages with the snap-fit ​​recess.

[0011] In one possible design, the roller includes multiple sets of fan-shaped auxiliary members, the movable members being able to change their length in the radial direction of the roller body.

[0012] In one possible design, the roller includes multiple sets of fan-shaped auxiliary components, each set having a different thickness along the radial direction of the roller body.

[0013] In one possible design, the roller includes multiple sets of fan-shaped auxiliary components, each set having a different thickness along the radial direction of the roller body.

[0014] In one possible design, the roller includes a plurality of said auxiliary members, one end of which is provided with a protrusion and the other end with a recess along the extending direction of the auxiliary members, the protrusion being able to engage with the recess of an adjacent auxiliary member.

[0015] This application provides a roller press, which includes a machine body and a guide roller installed on the machine body, wherein the guide roller is the guide roller described above.

[0016] In this application, the auxiliary component protrudes from the circumferential surface of the roller body. When the electrode sheet is rolled by the roller, the auxiliary component can contact the empty foil area, causing the empty foil area to also be rolled and stretched, preventing inconsistent stretching between the coated area and the empty foil area, and preventing wrinkles from forming in the empty foil area. At the same time, by setting up the auxiliary component, there is no need to stick tape on the surface of the roller, which facilitates the operator's operation, saves the time required for rolling the electrode sheet, and improves the efficiency of rolling the electrode sheet.

[0017] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the structure of the electrode sheet in a specific embodiment of this application;

[0019] Figure 2 is a schematic diagram of the structure of the roller provided in this application in a specific embodiment;

[0020] Figure 3 is a left view of the roller in Figure 2;

[0021] Figure 4 is a cross-sectional view along direction AA in Figure 3;

[0022] Figure 5 is a structural schematic diagram of the movable part in Figure 2;

[0023] Figure 6 is a structural schematic diagram of the fixing part in Figure 5;

[0024] Figure 7 is a cross-sectional view along the BB direction in Figure 6;

[0025] Figure 8 is a schematic diagram of the moving part in Figure 5;

[0026] Figure 9 is a partial structural schematic diagram of the auxiliary component in Figure 2.

[0027] Figure label:

[0028] 1-Roller body;

[0029] 11-Mounting slot;

[0030] 2-Auxiliary components;

[0031] 21-Protrusion;

[0032] 22-Recessed area;

[0033] 3-Active parts;

[0034] 31-Fixing part;

[0035] 311 - Receiving cavity;

[0036] 312 - Guide groove;

[0037] 32-Moving part;

[0038] 321 - Guide protrusion;

[0039] 322-Snap-fit ​​protrusion;

[0040] 4-Electrode;

[0041] 41 - Coating area;

[0042] 42 - Empty foil area.

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0044] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0045] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0046] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0047] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0048] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0049] Figure 1 shows an electrode sheet. As shown in Figure 1, the electrode sheet 4 includes a coating area 41 and empty foil areas 42 disposed on both sides of the coating area 41. The coating area 41 is coated with an active material, so the thickness of the coating area 41 is greater than the thickness of the empty foil area 42.

[0050] This application provides a guide roller, as shown in Figures 2 to 4. The guide roller includes a roller body 1, multiple auxiliary components 2, and multiple movable components 3. The roller body 1 has a mounting groove 11 and a mounting hole 12. The mounting groove 11 is arranged along the circumference of the roller body 1, and the mounting hole 12 is arranged at the bottom of the mounting groove 11 and penetrates the roller body 1. The movable component 3 passes through the mounting hole 12 and is connected to the auxiliary component 2. The auxiliary component 2 protrudes from the circumferential surface of the roller body 1.

[0051] In this embodiment, as shown in Figures 2-4, the auxiliary component 2 protrudes from the circumferential surface of the roller body 1. When the electrode sheet 4 is rolled by the roller, the auxiliary component 2 can contact the empty foil area 42, causing the empty foil area 42 to also be stretched by the roller, preventing inconsistent stretching between the coating area 41 and the empty foil area 42, and preventing wrinkles from forming in the empty foil area 42. At the same time, by setting the auxiliary component 2, there is no need to stick tape on the surface of the roller, which facilitates the operator's operation, saves the time required for rolling the electrode sheet 4, and improves the efficiency of rolling the electrode sheet 4. When the degree to which the auxiliary component 2 protrudes from the circumferential surface of the roller body 1 is small, a part of the auxiliary component 2 is accommodated in the mounting groove 11; when the degree to which the auxiliary component 2 protrudes from the circumferential surface of the roller body 1 is large, the auxiliary component 2 is outside the mounting groove 11.

[0052] Specifically, along the axial direction X of the roller body 1, two mounting grooves 11 are provided at intervals on the roller body 1. Auxiliary components 2 can be installed in the two mounting grooves 11 respectively, and are supported by movable components 3 respectively. The auxiliary components 2 in the two mounting grooves 11 can correspond to the empty foil areas 42 on both sides of the coating area 41, so that when the electrode sheet 4 is rolled by the roller, the extension degree of the empty foil areas 42 on both sides is the same as the extension degree of the coating area 41 in the middle, and the electrode sheet 4 will not wrinkle.

[0053] Specifically, the auxiliary component 2 is fan-shaped, and multiple auxiliary components 2 can be arranged into a ring. Multiple auxiliary components 2 arranged into a ring form a group. The auxiliary components 2 in a group are exactly the same in size and shape and can be produced by the same set of molds.

[0054] Specifically, as shown in Figures 5 and 6, the movable part 3 includes a fixed part 31, a movable part 32, and a driving part (not shown in the figures). The fixed part 31 is provided with a receiving cavity 311. The movable part 32 is slidably connected to the receiving cavity 311. The driving part can drive the movable part 32 to slide relative to the receiving cavity 311 to change the length of the movable part 32 extending out of the receiving cavity 311, thereby changing the length of the movable part 3 and thus adapting it to auxiliary parts 2 of different sizes.

[0055] Both the receiving cavity 311 and the moving part 32 are rectangular or cubic in shape. When the moving part 32 is installed in the receiving cavity 311, the receiving cavity 311 restricts the rotation of the moving part 32 relative to the fixed part 31.

[0056] Optionally, the drive unit is located inside the receiving cavity 311, making the roller structure more concentrated and simple, while also making the drive unit less susceptible to damage from external impacts. The drive unit includes a lead screw and a servo motor. A push block is threaded onto the lead screw. When the servo motor drives the lead screw to rotate, the push block moves along the lead screw and pushes the moving part 32 to slide relative to the receiving cavity 311.

[0057] Understandably, the drive unit can also be other structures that enable the drive moving unit 32 to slide relative to the receiving cavity 311.

[0058] In addition, the movable part 3 may not have a drive unit, and when it is necessary to adjust the length of the moving part 32 extending out of the receiving cavity 311, it can be done manually by the operator.

[0059] More specifically, as shown in Figures 7 and 8, one of the inner wall of the receiving cavity 311 and the outer periphery of the moving part 32 is provided with a guide protrusion 321, and the other is provided with a guide groove 312. The guide protrusion 321 and the guide groove 312 cooperate to limit the range of movement of the moving part 32 relative to the fixed part 31, thereby guiding the sliding of the moving part 32 relative to the fixed part 31 and improving the stability of the moving part 3 during operation.

[0060] Optionally, the inner wall of the receiving cavity 311 is provided with a guide groove 312, and the outer periphery of the moving part 32 is provided with a guide protrusion 321. Preferably, the guide groove 312 is provided on two opposite inner walls of the receiving cavity 311, and the guide protrusion 321 is provided on two opposite outer walls of the moving part 32.

[0061] Optionally, the inner wall of the receiving cavity 311 is provided with a guide protrusion 321, and the outer periphery of the moving part 32 is provided with a guide groove 312. Preferably, the guide protrusion 321 is provided on two opposite inner walls of the receiving cavity 311, and the guide groove 312 is provided on two opposite outer walls of the moving part 32.

[0062] Furthermore, as shown in Figure 8, one of the ends of the moving part 32 away from the driving part and the auxiliary part 2 is provided with a snap-fit ​​protrusion 322, and the other is provided with a snap-fit ​​recess. The snap-fit ​​protrusion 322 and the snap-fit ​​recess cooperate to enable the moving part 3 to stably support the auxiliary part 2 and ensure the stability of the auxiliary part 2 during the process of pressing the electrode sheet through the roller 4.

[0063] Optionally, the end of the movable part 32 away from the fixed part 31 is provided with a snap-fit ​​protrusion 322, and the auxiliary member 2 is provided with a snap-fit ​​recess. The size of the snap-fit ​​protrusion 322 is smaller than the size of other parts on the movable part 32 to prevent interference between the movable part 32 and the electrode 4. The snap-fit ​​protrusion 322 can be integrally formed with other parts on the movable part 32 or be provided separately.

[0064] Optionally, the end of the movable part 32 away from the fixed part 31 is provided with a snap-fit ​​recess, and the auxiliary part 2 is provided with a snap-fit ​​protrusion 322.

[0065] Furthermore, the snap-fit ​​protrusion 322 and the snap-fit ​​recess are interference-fitted to improve the stability of the connection between the movable part 3 and the auxiliary part 2.

[0066] In one specific embodiment, the roller includes multiple sets of auxiliary components 2, each set of auxiliary components 2 having the same thickness along the radial direction X of the roller body 1, and each set of auxiliary components 2 having a different minimum radius; the movable component 3 can change its length along the radial direction X of the roller body 1.

[0067] For electrode sheets 4 of different specifications, the thickness difference between the coating area 41 and the empty foil area 42 varies. The roller can be adapted to auxiliary parts 2 with different minimum radii so that the pressure applied by the roller to the coating area 41 and the empty foil area 42 is similar, and the degree of stretching caused by the roller pressure is similar, making it less likely for wrinkles to form on the electrode sheet 4. The length of the movable part 3 along the radial direction X of the roller body 1 can be changed, so it can be adapted to auxiliary parts 2 with different minimum radii and provides support for the auxiliary parts 2.

[0068] In another specific embodiment, the roller includes multiple sets of auxiliary components 2, each set of auxiliary components 2 having a different thickness along the radial direction X of the roller body 1, and each set of auxiliary components 2 having the same minimum radius.

[0069] For electrode sheets 4 of different specifications, the thickness difference between the coating area 41 and the empty foil area 42 varies. The roller can accommodate auxiliary parts 2 of different thicknesses to make the pressure applied by the roller to the coating area 41 and the empty foil area 42 similar, so that the degree of stretching caused by the roller pressure is similar, and wrinkles are less likely to form on the electrode sheet 4. Since the minimum radius of each set of auxiliary parts 2 is the same, the length of the movable part 3 adapted to different auxiliary parts 2 along the radial direction X of the roller body 1 can be the same.

[0070] Furthermore, the length of the movable part 3 along the radial direction X of the roller body 1 does not need to be changed. Therefore, the movable part 3 can be configured to have a fixed length along the radial direction X of the roller body 1, thereby simplifying the structure of the movable part 3 and reducing the production cost of the roller. At the same time, since the length of the movable part 3 along the radial direction X of the roller body 1 does not need to be adjusted when replacing the auxiliary part 2, the difficulty of replacing the auxiliary part 2 can be reduced, and the time required for replacing the auxiliary part 2 can be reduced.

[0071] In the above embodiments, as shown in FIG9, along the extension direction of the auxiliary member 2, one end of the auxiliary member 2 is provided with a protrusion 21 and the other end is provided with a recess 22, and the protrusion 21 can cooperate with the recess 22 of the adjacent auxiliary member 2.

[0072] The protrusion 21 overlaps or snaps with the recess 22, making the connection at the joint of adjacent auxiliary parts 2 relatively stable. During the rolling process, when the joint of adjacent auxiliary parts 2 comes into contact with the electrode 4, the friction between the auxiliary parts 2 and the electrode 4 will not cause the adjacent auxiliary parts 2 to separate, thus ensuring that the rolling operation can proceed normally.

[0073] Optionally, along the extending direction of the auxiliary member 2, the width of the recess 22 or the protrusion 21 may gradually decrease, gradually increase, or remain unchanged.

[0074] Furthermore, the roller has four movable parts 3, which are perpendicular to each other, forming a cross shape. Each movable part 3 is connected to an auxiliary part 2, meaning that each auxiliary part 2 is supported by at least one movable part 3, making the support of the auxiliary part 2 by the movable part 3 more reliable.

[0075] Accordingly, as shown in Figure 3, the bottom of the mounting groove 11 is provided with four mounting holes 12 spaced apart, with adjacent mounting holes 12 spaced 90° apart, so that the four movable parts 3 can pass through the four mounting holes 12 respectively and contact the auxiliary parts 2.

[0076] Furthermore, the four fixed parts 31 of the four interconnected movable parts 3 are connected together, and the receiving cavities 311 of the four fixed parts 31 are connected, so that the volume of the receiving cavity 311 is large and the driving part can be accommodated in the receiving cavity 311.

[0077] This application embodiment also provides a roller press, which includes a machine body and a guide roller. The guide roller is mounted on the machine body, and the machine body can drive the guide roller to roll the electrode sheet 4. After the electrode sheet 4 is rolled by the roller press, the degree of extension of the empty foil areas 42 on both sides of the electrode sheet 4 is the same as the degree of extension of the coating area 41 in the middle, and the electrode sheet 4 will not produce wrinkles.

[0078] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. 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 roller, characterized in that, The roller includes: a roller body (1) having a mounting groove (11) and a mounting hole (12), the mounting groove (11) being arranged along the circumference of the roller body (1), and the mounting hole (12) being located at the bottom of the mounting groove (11) and penetrating the roller body (1); a plurality of auxiliary parts (2) protruding from the circumferential surface of the roller body (1); and a plurality of movable parts (3) passing through the mounting hole (12) and connected to the auxiliary parts (2).

2. The roller according to claim 1, characterized in that, The movable part (3) includes a fixed part (31), a movable part (32) and a driving part. The fixed part (31) is provided with a receiving cavity (311). The movable part (32) is slidably connected to the receiving cavity (311). The driving part can drive the movable part (32) to slide relative to the receiving cavity (311).

3. The roller according to claim 2, characterized in that, The drive unit is disposed within the receiving cavity (311).

4. The roller according to claim 3, characterized in that, The drive unit includes a lead screw and a servo motor. A push block is threaded onto the lead screw. When the servo motor drives the lead screw to rotate, the push block moves along the lead screw and pushes the moving part (32) to slide relative to the receiving cavity (311).

5. The roller according to claim 2, characterized in that, One of the inner wall of the receiving cavity (311) and the outer periphery of the moving part (32) is provided with a guide protrusion (321), and the other is provided with a guide groove (312), wherein the guide protrusion (321) and the guide groove (312) cooperate.

6. The roller according to claim 2, characterized in that, The moving part (32) is provided with a snap-fit ​​protrusion (322) at one end away from the driving part and the auxiliary member (2), and a snap-fit ​​recess is provided on the other end, wherein the snap-fit ​​protrusion (322) and the snap-fit ​​recess cooperate.

7. The roller according to claim 1, characterized in that, The roller includes multiple sets of fan-shaped auxiliary components (2); the movable component (3) is capable of changing its length along the radial direction of the roller body (1).

8. The roller according to claim 1, characterized in that, The roller includes multiple sets of fan-shaped auxiliary components (2), each set of auxiliary components (2) having a different thickness along the radial direction (X) of the roller body (1).

9. The roller according to any one of claims 1-8, characterized in that, The roller includes a plurality of auxiliary components (2). Along the extending direction of the auxiliary component (2), one end of the auxiliary component (2) is provided with a protrusion (21) and the other end is provided with a recess (22). The protrusion (21) can cooperate with the recess (22) of the adjacent auxiliary component (2).

10. A roller press, characterized in that, The roller press includes a machine body and a guide roller installed on the machine body, wherein the guide roller is the guide roller as described in any one of claims 1-9.

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