Precise coating roller for lithium battery

Abstract

The utility model discloses a precise coating roller for a lithium battery, and belongs to the technical field of coating rollers. The inner roller mainly comprises an inner roller and further comprises a limiting ring fixed to one side of the outer end of the inner roller. The roller surface is arranged at the outer end of the inner roller in a sleeving mode and comprises a sleeve, the middle of the sleeve is a reticulated area, the two sides of the sleeve are smooth areas, and one end of the sleeve abuts against the limiting ring; the enclasping mechanism is arranged at one end, far away from the limiting ring, of the roller surface in a sleeving manner and is used for positioning the roller surface; the two tensioning mechanisms are fixed to the upper side and the lower side of one end of the inner roller respectively and comprise installation bases, traction assemblies are installed on the outer sides of the installation bases and connected with pull rods, the tail ends of the pull rods extend to the outer sides of the holding mechanisms and are fixedly connected with positioning heads, and the positioning heads abut against the outer sides of the holding mechanisms. According to the precise coating roller for the lithium battery, the enclasping mechanism and the tensioning mechanism are arranged, so that sleeving type installation and detachable design of the roller surface are achieved, the integrity of a reticulate pattern area is guaranteed, and the roller surface is conveniently and rapidly assembled and disassembled.

Description

Technical Field

[0001] This application relates to the field of coating roller technology, specifically to precision coating rollers for lithium batteries. Background Technology

[0002] Precision coating rollers for lithium batteries are the core equipment in the production of lithium battery electrode sheets. They are used to uniformly coat the positive and negative electrode slurries onto the surface of substrates such as copper foil and aluminum foil. Their precision directly affects the consistency of electrode sheet thickness and coating uniformity, which in turn determines the energy density, cycle life and safety of lithium batteries.

[0003] For example, the patent with publication number CN217415187U discloses a printing and coating gravure roller for lithium battery manufacturing, including: a roller shaft and a doctor blade, multiple arc-shaped grooves opened on the outside of the roller body, and an arc-shaped roller surface embedded inside the arc-shaped grooves; the anilox layer can be disassembled separately for cleaning or replacement.

[0004] The aforementioned patent achieves disassembly of the roller surface through fastening bolts and positioning holes. However, in actual use, because its arc-shaped roller surface is embedded in an arc-shaped groove, the roller surface needs to be divided into multiple sections, resulting in discontinuous sections in the textured area. Furthermore, the embedded installation method creates gaps between the coating area and the roller body, leading to the accumulation of coating slurry in these gaps over time, which can affect the uniformity of the coating slurry. Therefore, it is necessary to provide a precision coating roller for lithium batteries to solve these problems.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is: to provide a precision coating roller for lithium batteries, which is equipped with a clamping mechanism and a tensioning mechanism to realize the sleeve-type installation and detachable design of the roller surface, ensuring the integrity of the textured area and facilitating quick loading and unloading of the roller surface.

[0007] The technical solution adopted by this application to solve its technical problem is: a precision coating roller for lithium batteries, including an inner roller, and further comprising:

[0008] A limiting ring is fixed to one side of the outer end of the inner roller;

[0009] The roller surface, sleeved on the outer end of the inner roller, includes a sleeve, the middle part of which is a textured area and the two sides are smooth areas, and one end of the sleeve abuts against the limiting ring.

[0010] A clamping mechanism is fitted onto the end of the roller surface away from the limiting ring, and is used to position the roller surface;

[0011] The tensioning mechanism has two sets, which are respectively fixed on the upper and lower sides of one end of the inner roller. It includes a mounting base, and a tensioning assembly is installed on the outer side of the mounting base. The tensioning assembly is connected to a pull rod. The end of the pull rod extends to the outer side of the clamping mechanism and is fixedly connected to a positioning head. The positioning head abuts against the outer side of the clamping mechanism.

[0012] Furthermore, the inner roller includes a roller body, a roller shaft is fixedly disposed at the center of the roller body, and guide bars are fixedly disposed on the outer surface of the roller body.

[0013] Furthermore, a guide groove is provided on the inner side of the sleeve. The guide groove is open on the side near the limiting ring and closed at the other end. The guide bar slides in conjunction with the guide groove.

[0014] Furthermore, the traction assembly includes a connecting frame rotatably connected to the mounting base, one end of the connecting frame is rotatably connected to a handle, and a connecting column is rotatably installed on the inner side of the handle. The connecting column slides through the ring on the upper side of the mounting base and is fixedly connected to the pull rod.

[0015] Furthermore, the sleeve has through holes on both sides, top and bottom, with the inner diameter of the through holes being larger than the diameter of the positioning head. The pull rod slides through the limiting ring, the positioning head, and the clamping mechanism in sequence.

[0016] Furthermore, the clamping mechanism includes two clamping rings rotatably connected at their ends. Each of the two clamping rings has a fixed end head at its mating end. A screw is rotatably connected to the inner side of the lower end head. A locking nut is sleeved on the outer end of the screw, and the locking nut abuts against the upper end head.

[0017] Furthermore, both of the retaining rings have through slots on their inner sides for the pull rod to pass through.

[0018] Furthermore, an end ring is fixed to the end of the sleeve away from the limiting ring, and the clamping ring has two clamping surfaces arranged in a stepped manner, one clamping surface contacting the end ring and the other contacting the inner roller.

[0019] The beneficial effects of this application are as follows: The precision coating roller for lithium batteries provided by this application adopts an integral sleeve structure on the roller surface. Compared with the embedded roller surface in the prior art, the central textured area is continuous and uninterrupted, without any embedded gaps, which can prevent the coating slurry from accumulating in the gaps and reduce coating thickness fluctuations caused by material accumulation. At the same time, by setting a clamping mechanism and a tensioning mechanism, the roller surface can be installed in a sleeve-type and detachable design, which not only ensures the integrity of the textured area, but also facilitates quick installation and removal of the roller surface for cleaning or replacement.

[0020] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0022] In the attached diagram:

[0023] Figure 1 This is an overall schematic diagram of the precision coating roller for lithium batteries in this application;

[0024] Figure 2 This is a schematic diagram of the structure of the precision coating roller for lithium batteries in this application;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a schematic diagram of the end structure of the roller surface in the precision coating roller for lithium batteries in this application;

[0027] Figure 5 This is a schematic diagram of the structure of the other end of the roller surface in the precision coating roller for lithium batteries in this application;

[0028] Figure 6 This is a schematic diagram of the clamping mechanism in the precision coating roller for lithium batteries in this application.

[0029] The following are the labeling elements in the figure:

[0030] 1. Inner roller; 11. Roller body; 12. Roller shaft; 13. Guide bar; 2. Roller surface; 21. Sleeve; 22. Through hole; 23. Guide groove; 24. End ring; 3. Clamping mechanism; 31. Clamping ring; 32. End head; 33. Screw; 34. Locking nut; 4. Limiting ring; 5. Tensioning mechanism; 51. Mounting base; 52. Pulling assembly; 521. Handle; 522. Connecting frame; 523. Connecting column; 53. Pull rod; 54. Positioning head. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0033] like Figure 1-6 As shown, this application provides a precision coating roller for lithium batteries, including an inner roller 1, a limiting ring 4, a roller surface 2, a clamping mechanism 3, and a tensioning mechanism 5. The limiting ring 4 is fixed to one side of the outer end of the inner roller 1 by a plurality of screws, which is used to limit the installation position of the roller surface 2.

[0034] In this embodiment, the inner roller 1 includes a roller body 11, a roller shaft 12 is fixedly disposed at the center of the roller body 11, and a guide bar 13 is fixedly disposed on the outer surface of the roller body 11.

[0035] Roller surface 2 is sleeved on the outer end of inner roller 1, including sleeve 21. The middle part of sleeve 21 is a textured area, and the two sides are smooth areas. The textured area in the middle of sleeve 21 is used to uniformly coat the slurry, and the smooth areas on both sides can be used with the scraper of the coating machine to control the edge of the coating. One end of sleeve 21 abuts against limit ring 4.

[0036] The sleeve 21 has a guide groove 23 on its inner side. The guide groove 23 is open on one side near the limiting ring 4 and closed on the other side. The guide bar 13 slides in cooperation with the guide groove 23. When the guide bar 13 slides along the guide groove 23, it restricts the circumferential rotation of the sleeve 21 and ensures that the textured area is accurately aligned with the inner roller 1. After the closed end of the guide groove 23 abuts against the guide bar 13, it cooperates with the abutment of the sleeve 21 and the limiting ring 4 to form axial positioning.

[0037] In this embodiment, the clamping mechanism 3 is mounted on the end of the roller surface 2 away from the limiting ring 4, and is used to position the roller surface 2.

[0038] Specifically, the clamping mechanism 3 includes two clamping rings 31 rotatably connected at their ends. Each clamping ring 31 has a fixed end 32 at its mating end. A screw 33 is rotatably connected to the inner side of the lower end 32. A locking nut 34 is sleeved on the outer end of the screw 33. The locking nut 34 abuts against the upper end 32. Rotating the locking nut 34 makes the locking nut 34 fit tightly against the end 32, thereby tightening the upper and lower clamping rings 31 to achieve radial clamping and positioning the roller surface 2.

[0039] The sleeve 21 is fixed with an end ring 24 at the end away from the limiting ring 4. The clamping ring 31 has two clamping surfaces arranged in a stepped manner. One clamping surface contacts the end ring 24 and the other contacts the inner roller 1. The stepped clamping surface contacts both the end ring 24 and the inner roller 1 at the same time, which disperses the locking force to prevent local deformation and also enhances the radial constraint stability.

[0040] The tensioning mechanism 5 has two sets, which are respectively fixedly embedded on the upper and lower sides of the inner roller 1 near the end of the limiting ring 4, and are used to provide axial tension force and position the roller surface 2.

[0041] Specifically, the tensioning mechanism 5 includes a mounting base 51, on the outside of which a tensioning assembly 52 is mounted. The tensioning assembly 52 is connected to a pull rod 53, the end of which extends to the outside of the clamping mechanism 3 and is fixedly connected to a positioning head 54. The positioning head 54 abuts against the outside of the clamping mechanism 3. The tensioning assembly 52 of the tensioning mechanism 5 drives the pull rod 53 to move axially via a lever principle, causing the positioning head 54 to press against the clamping ring 31, thus forming axial tension and ensuring the stability of the roller surface 2.

[0042] It should be noted that through holes 22 are provided on both the upper and lower sides of the sleeve 21, and the inner diameter of the through holes 22 is larger than the diameter of the positioning head 54. The pull rod 53 slides through the limiting ring 4, the positioning head 54, and the clamping mechanism 3 in sequence. The through holes 22 are designed to allow the pull rod 53 to pass through, and their inner diameter is larger than the diameter of the positioning head 54, so that when the sleeve 21 is disassembled, the positioning head 54 can pass smoothly through the through holes 22 without interference.

[0043] Both retaining rings 31 have through slots on their inner sides for the pull rod 53 to pass through. The outer side of the through slot is open, so that the pull rod 53 can pass through when the retaining ring 31 is closed or open. The through slot on the retaining surface that contacts the inner roller 1 has a long opening. In order to ensure that the pull rod 53 can enter smoothly, the opening of the through slot is set as a slope to ensure that the inner wall of the through slot does not interfere with the pull rod 53.

[0044] The traction assembly 52 includes a connecting frame 522 rotatably connected to the mounting base 51. One end of the connecting frame 522 is rotatably connected to a handle 521. A connecting post 523 is rotatably installed on the inner side of the handle 521. The connecting post 523 slides through the ring on the upper side of the mounting base 51 and is fixedly connected to the pull rod 53. The handle 521 is in the shape of a "Z". When the handle 521 is pressed down, the pull rod 53 is pulled back through the transmission of the connecting post 523, so that the positioning head 54 presses against the retaining ring 31. When the handle 521 is lifted up, the pull rod 53 extends a certain distance, and the positioning head 54 is released from the state of pressing against the retaining ring 31.

[0045] During disassembly, lift handle 521, then disassemble the clamping mechanism 3 to lock the roller surface 2, thus removing the roller surface 2 and improving disassembly and installation efficiency. This socket-type installation method also ensures the integrity of the roller surface 2, preventing any breaks in the mesh pattern and avoiding gaps between the mesh area and the roller body in the embedded structure. This prevents the accumulation of coating slurry in the gaps, ensuring the uniformity of the coating slurry.

[0046] The clamping mechanism 3 provides radial positioning, while the tensioning mechanism 5 provides axial positioning, forming a double fixing structure to resist centrifugal force during rotation, prevent axial movement and radial offset of the roller surface 2, reduce the coating defect rate caused by vibration, and ensure precision.

[0047] Working principle: During installation, first, the sleeve 21 of the roller surface 2 is fitted onto the outer end of the inner roller 1, aligning the guide groove 23 on the inner side of the sleeve 21 with the guide bar 13 of the inner roller 1, and aligning the through hole 22 and the pull rod 53. Slide the sleeve 21 along the guide bar 13 until one end of the sleeve 21 abuts against the limiting ring 4 on the inner roller 1, and the pull rod 53 also completely passes through the sleeve 21. The cooperation between the guide bar 13 and the guide groove 23 restricts the circumferential rotation of the sleeve 21, while the limiting ring 4 limits the initial axial position.

[0048] Then, install the clamping mechanism 3, and put the two clamping rings 31 on the outside of the end ring 24 of the sleeve 21, so that the stepped clamping surfaces of the clamping rings 31 are respectively in contact with the end ring 24 and the inner roller 1. Rotate the screw 33 of the lower end 32 so that the upper end 32 is embedded in the screw 33. Tighten the locking nut 34 until it abuts against the upper end 32, and fix the sleeve 21 by the radial tightening force of the clamping rings 31.

[0049] Finally, by pulling the handle 521 of the pulling assembly 52, the lever transmission between the connecting frame 522 and the connecting column 523 drives the pull rod 53 to move, causing the end positioning head 54 to press against the outside of the clamping ring 31. At this time, the axial tension of the tensioning mechanism 5 and the limiting ring 4 form a bidirectional constraint, which, together with the radial fixation of the clamping mechanism 3, achieves a stable installation of the roller surface 2.

[0050] 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 precision coating roller for lithium batteries, comprising an inner roller (1), characterized in that, Also includes: A limiting ring (4) is fixed to one side of the outer end of the inner roller (1); Roller surface (2), sleeved on the outer end of the inner roller (1), includes sleeve (21), the middle part of the sleeve (21) is a textured area, the two sides are smooth areas, and one end of the sleeve (21) abuts against the limiting ring (4). The clamping mechanism (3) is sleeved on the end of the roller surface (2) away from the limiting ring (4) and is used to position the roller surface (2); The tensioning mechanism (5) has two sets, which are respectively fixed on the upper and lower sides of one end of the inner roller (1). It includes a mounting base (51), and a traction assembly (52) is installed on the outside of the mounting base (51). The traction assembly (52) is connected to a pull rod (53). The end of the pull rod (53) extends to the outside of the clamping mechanism (3) and is fixedly connected to a positioning head (54). The positioning head (54) abuts against the outside of the clamping mechanism (3).

2. The precision coating roller for lithium batteries according to claim 1, characterized in that: The inner roller (1) includes a roller body (11), a roller shaft (12) is fixedly provided at the center of the roller body (11), and a guide bar (13) is fixedly provided on the outer surface of the roller body (11).

3. The precision coating roller for lithium batteries according to claim 2, characterized in that: The sleeve (21) has a guide groove (23) on its inner side. The guide groove (23) is open on one side near the limiting ring (4) and closed on the other side. The guide bar (13) slides in cooperation with the guide groove (23).

4. The precision coating roller for lithium batteries according to claim 1, characterized in that: The traction assembly (52) includes a connecting frame (522) rotatably connected to the mounting base (51). One end of the connecting frame (522) is rotatably connected to a handle (521). A connecting column (523) is rotatably installed on the inner side of the handle (521). The connecting column (523) slides through the ring on the upper side of the mounting base (51) and is fixedly connected to the pull rod (53).

5. The precision coating roller for lithium batteries according to claim 4, characterized in that: The sleeve (21) has through holes (22) on both sides inside, and the inner diameter of the through holes (22) is larger than the diameter of the positioning head (54). The pull rod (53) slides through the limiting ring (4), the positioning head (54) and the clamping mechanism (3) in sequence.

6. The precision coating roller for lithium batteries according to claim 1, characterized in that: The clamping mechanism (3) includes two clamping rings (31) rotatably connected at their ends. Each clamping ring (31) has a fixed end (32) at its mating end. A screw (33) is rotatably connected to the inner side of the lower end (32). A locking nut (34) is sleeved on the outer end of the screw (33). The locking nut (34) abuts against the upper end (32).

7. The precision coating roller for lithium batteries according to claim 6, characterized in that: Both of the two retaining rings (31) have through slots on their inner sides for the pull rod (53) to pass through.

8. The precision coating roller for lithium batteries according to claim 6, characterized in that: The sleeve (21) is fixed with an end ring (24) at the end away from the limiting ring (4). The clamping ring (31) has two clamping surfaces arranged in a stepped manner. One clamping surface contacts the end ring (24), and the other contacts the inner roller (1).

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