Coating gasket and coating die head

Abstract

The utility model relates to a coating gasket and a coating die head, the coating gasket comprises a gasket body, a turbulent flow assembly and a flow guide assembly, and one or more discharge ports are formed in the gasket body; the turbulent flow assembly comprises turbulent flow single pieces arranged in the discharging port. The flow guide assembly comprises flow guide pieces arranged on the two sides of the discharging opening. According to the coating gasket, interference on slurry flowing out of the discharging opening can be achieved through the turbulent flow single pieces of the turbulent flow assemblies, so that the flow speed of the slurry in the coating middle area is slowed down, and the problem that the surface density of the middle area is high is solved; the flow deflectors are arranged on the two sides of the discharging port, the flow speed of slurry on the edge of the discharging port can be guided and controlled, excessive accumulation of the slurry in the discharging edge area is avoided, and therefore the phenomenon that the coating edge becomes thick is prevented, the surface density and the coating thickness of the coating area can be consistent through the cooperative cooperation effect of the flow disturbing assembly and the flow guiding assembly, and the coating quality is improved. The problems of uneven surface density and edge thickness change in the coating process are solved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a coating pad and a coating die. Background Technology

[0002] In lithium battery production, the coating process is a crucial step affecting battery performance and consistency. Existing coating processes often suffer from uneven coating thickness, particularly in the central coating area where the areal density is often higher than at the edges. This uneven coating leads to unstable battery performance, especially in large-scale production. Furthermore, existing coating die structures struggle to control slurry distribution at the edges, resulting in excessive slurry accumulation and an overly thick coating at the edges, thus impacting the overall coating quality. Utility Model Content

[0003] This application provides a coating pad and a coating die to solve the technical problems of uneven surface density and excessive edge thickness that easily occur in the existing coating process.

[0004] In a first aspect, this application provides a coated gasket, comprising:

[0005] Gasket body, the gasket body is provided with one or more discharge ports;

[0006] A flow-dissipating assembly, comprising a flow-dissipating element disposed within the discharge port;

[0007] The flow guiding assembly includes flow guiding elements disposed on both sides of the discharge port.

[0008] Optionally, there are multiple discharge ports, which are arranged sequentially along the coating width direction. The turbulence-inducing component includes multiple turbulence-inducing elements, which are arranged one-to-one with the multiple discharge ports.

[0009] Optionally, the plurality of turbulence-disrupting elements include a first turbulence-disrupting element, a second turbulence-disrupting element, and a third turbulence-disrupting element. The first turbulence-disrupting element is disposed in the middle of the gasket body, and the second and third turbulence-disrupting elements are symmetrically disposed on both sides of the first turbulence-disrupting element. The size of the second turbulence-disrupting element and the size of the third turbulence-disrupting element are both smaller than the size of the first turbulence-disrupting element.

[0010] Optionally, the turbulence-inducing component is a long strip structure, with the length direction of the long strip structure perpendicular to the discharge direction of the discharge port.

[0011] Optionally, the spoiler assembly also includes a connector that connects the gasket body and the spoiler unit.

[0012] Optionally, multiple connectors are sequentially arranged along the length of the turbulence-disrupting unit, and the multiple connectors, the turbulence-disrupting unit, and the gasket body are integrated into one structure.

[0013] Optionally, the guide is a curved guide vane, and there is a preset angle between the discharge end of the guide and the discharge direction of the discharge port.

[0014] Optionally, the guides on both sides of the discharge port are arranged symmetrically, so that the end of the discharge port is gradually widened.

[0015] Optionally, the thickness of the turbulence component is 20%-40% of the thickness of the gasket body, and the thickness of the flow guide is 50%-60% of the thickness of the gasket body.

[0016] Secondly, this application provides a coating die head, including the coating pad provided in the first aspect of this application.

[0017] The technical solutions provided in this application have the following advantages compared with the prior art:

[0018] The coating pad provided in this embodiment can interfere with the slurry in the outlet through the turbulence component, thereby slowing down the flow rate of the slurry in the middle coating area and reducing the problem of high surface density in the middle area. The guide vanes on both sides of the outlet can guide and control the flow rate of the slurry at the edge of the outlet, avoiding excessive accumulation of slurry at the edge of the outlet, thereby preventing the coating edge from becoming thick. Through the synergistic effect of the turbulence component and the guide component, the surface density and coating thickness of the coating area can be made consistent, solving the problems of uneven surface density and excessive edge thickness in the coating process. Attached Figure Description

[0019] 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.

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0022] Figure 1 A top view of the coated pad provided in the embodiments of this application;

[0023] Figure 2 Provided for the embodiments of this application Figure 1 A magnified view of a local detail;

[0024] Figure 3 Provided for the embodiments of this application Figure 2 Enlarged detail of section A;

[0025] Figure 4 Provided for the embodiments of this application Figure 2 A magnified view of the details in section B.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Gasket body; 11. First discharge port; 12. Second discharge port; 13. Third discharge port; 14. Plate body;

[0028] 2. Spoiler assembly; 21. First spoiler component; 22. Second spoiler component; 221. Arc-shaped end; 23. Third spoiler component; 24. Connector;

[0029] 3. Flow guiding component; 31. First flow guiding element; 32. Second flow guiding element. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0032] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0033] To address the technical problems of uneven surface density and excessive edge thickness that easily occur in existing coating processes, this application provides a coating pad and a coating die head. The pad can interfere with the slurry inside the outlet through the flow-dispersing component 2, slowing down the flow rate of the slurry in the middle coating region, thereby reducing the problem of excessive surface density in the middle region. Guide vanes are provided on both sides of the outlet to guide and control the flow rate of the slurry at the outlet edge, preventing excessive accumulation of slurry in the outlet edge region and thus preventing the coating edge from becoming thicker. Through the synergistic effect of the flow-dispersing component 2 and the flow-guided component 3, the surface density and coating thickness of the coating area can be made consistent, solving the problems of uneven surface density and edge thickness variations during the coating process.

[0034] Please see Figures 1 to 4 The first aspect of this application provides a coating pad, including a pad body 1, a flow-deflecting component 2, and a flow-guiding component 3. The pad body 1 has one or more outlets, allowing coating slurry to flow out from one or more outlets. The flow-deflecting component 2 includes a flow-deflecting element disposed within the outlet, which can agitate the slurry flowing out of the outlet, thereby slowing down the slurry flow rate in the middle region of the outlet, thus preventing excessive areal density in the middle region and affecting the consistency of areal density in the coating area. In addition, the flow-deflecting element can also prevent the coating in the middle region of the outlet from being too thick, which is beneficial to ensuring the consistency of coating thickness in the coating area. The flow-guiding component 3 includes flow-guiding elements disposed on both sides of the outlet, which can control the slurry flow in the outlet edge region on both sides of the outlet. When the slurry flows to the outlet edge, it slows down the slurry flow rate and controls the slurry flow rate, preventing excessive accumulation of slurry in the edge region, thereby preventing an excessively thick coating in the edge region.

[0035] In some embodiments of this application, the number of discharge ports is multiple, and the multiple discharge ports are along the coating width direction (i.e. Figure 1 The multiple outlets (located sequentially in the left-right direction) allow for more uniform slurry flow compared to a single outlet, ensuring consistent slurry thickness across the coating area covered by the coating pad when the width of the coating area is constant. The turbulence-disrupting component 2 comprises multiple turbulence-disrupting elements, each corresponding to one of the multiple outlets, enabling adjustment of the slurry flow rate at each outlet. By adjusting the position, length, and thickness of the turbulence-disrupting elements, the problem of uneven surface density in the coating area can be effectively improved.

[0036] In some embodiments of this application, the gasket body 1 includes three discharge ports sequentially opened along the coating width direction. Figure 1 From left to right, the outlets are designated as the second outlet 12, the first outlet 11, and the third outlet 13. The first outlet 11 is located in the middle of the coating pad plate 14, while the second outlet 12 and the third outlet 13 are located on either side of the first outlet 11. The turbulence assembly 2 includes multiple turbulence components: a first turbulence component 21, a second turbulence component 22, and a third turbulence component 23. The first turbulence component 21 is located in the middle of the pad body 1 and is used to agitate the slurry flowing from the first outlet 11. The second turbulence component 22 and the third turbulence component 23 are symmetrically arranged on either side of the first turbulence component 21 and are used to agitate the slurry flowing from the second outlet 12 and the third outlet 13, respectively. Figure 1 As shown. Since the high-speed flow area of ​​the coating die head is mainly distributed in the middle area of ​​the coating pad (i.e., the area corresponding to the first discharge port 11), the dimensions of the second turbulence element 22 and the third turbulence element 23 are both smaller than the dimensions of the first turbulence element 21 (the dimensions may include length, thickness, etc.). This is to allow the larger-sized first turbulence element 21 to have a greater turbulence effect on the middle area of ​​the coating pad, thereby ensuring that the surface density of the coating area remains consistent from the middle area to the edge area.

[0037] Specifically, in the coating width direction (i.e. Figure 1 In terms of dimensions (left-right direction), the lengths of the second turbulence element 22 and the third turbulence element 23 are both less than the length of the first turbulence element 21; in the thickness direction of the gasket body 1 (i.e., the front-back direction perpendicular to the paper surface), the thicknesses of the second turbulence element 22 and the third turbulence element 23 are both less than the thickness of the first turbulence element 21, which can effectively reduce the slurry flow rate in the high-speed slurry flow area, reduce the surface density in the middle of the coating area, and ensure the consistency of the surface density and coating quality of the coating area.

[0038] In some preferred embodiments of this application, the length of the first baffle 21 is the same as the width of the outlet, and the widths of the second baffle 22 and the third baffle 23 are the same, both being 60%-70% of the outlet width. The second baffle 22 is connected to the side of the second outlet 12 closest to the first outlet 11, creating a gap between the second baffle 22 and the left side of the second outlet 12. The third baffle 23 is connected to the side of the third outlet 13 closest to the first outlet 11, creating a gap between the third baffle 23 and the right side of the third outlet 13. Figure 1 As shown, the second turbulence element 22, the first turbulence element 21, and the third turbulence element 23 are arranged in a straight line in the high-speed flow area of ​​the die head feeding area. This can prevent the second turbulence element 22 and the third turbulence element 23 from causing turbulence on the left and right edge areas of the entire coating area, thereby preventing the surface density of the edge area from further decreasing. This solves the problem of the coating surface density being high in the middle and low on both sides, and improves the consistency of the coating surface density.

[0039] In some embodiments of this application, please refer to Figure 1 , Figure 2 and Figure 3 The second turbulence element 22 has an arc-shaped end 221 at the end furthest from the first discharge port 11, which reduces the obstruction of the slurry in the left edge region and facilitates the diffusion of the slurry at the discharge port edge, thereby improving the consistency of the areal density. Correspondingly, the third turbulence element 23 also has an arc-shaped end 221 at the end furthest from the first discharge port 11, which reduces the obstruction of the slurry in the right edge region, thus ensuring that the coating area maintains a consistent areal density from left to center and from center to right.

[0040] It should be noted that in the above embodiments, the thickness of the turbulence-disrupting element is slightly higher than the normal flow height of the slurry. When the turbulence-disrupting element is placed in the discharge port and the bottom surface of the turbulence-disrupting element is in contact with the upper surface of the lower die head, it can block and interfere with the flow of the slurry. The slurry needs to pass over the turbulence-disrupting element before it can continue to flow forward, which can effectively reduce the flow rate of the slurry.

[0041] In some preferred embodiments of this application, the thickness of the turbulence-reducing element is 20%-40% of the thickness of the gasket body 1. This reduces the slurry flow rate and prevents the turbulence-reducing element from being too thick and affecting the normal discharge of the slurry. Specifically, the thickness of the first turbulence-reducing element 21 is 30%-40% of the thickness of the plate 14, while the thicknesses of the second turbulence-reducing element 22 and the third turbulence-reducing element 23 are 20%-40% of the thickness of the plate 14. This allows the turbulence intensity of the first turbulence-reducing element 21 to be greater than that of the second turbulence-reducing element 22 and the third turbulence-reducing element 23, thereby providing a greater turbulence and speed reduction effect on the slurry in the middle of the coating area.

[0042] In some embodiments of this application, please refer to Figure 1 The turbulence-inducing component is a long strip structure, the length of which is perpendicular to the discharge direction of the outlet. Figure 1 The elongated, strip-shaped turbulence-inducing element in the middle can vertically block and turbulently flow the slurry flowing out of the outlet, thereby reducing the flow velocity of the slurry in the outlet.

[0043] In some embodiments of this application, please refer to Figure 1 and Figure 2 The turbulence assembly 2 also includes a connector 24, which is connected between the gasket body 1 and the turbulence unit. This connector 24 can achieve relative fixation of the turbulence unit and prevent the turbulence unit from changing position after being impacted by the slurry, which would cause the areal density of the coating area to change as well.

[0044] In some embodiments of this application, please refer to Figure 1 and Figure 2 Multiple connectors 24 are sequentially arranged along the length of the baffle element, forming multiple connection points between the baffle element and the gasket body 1. This enhances the support strength of the elongated baffle element, thereby improving its structural stability and preventing deformation and bending due to insufficient rigidity during long-term use. The multiple connectors 24, the multiple baffle elements, and the gasket body 1 form an integrated structure, which can be manufactured through integrated milling. This reduces the manufacturing difficulty of the baffle assembly 2, eliminates the assembly process between the baffle assembly 2 and the gasket body 1, and thus improves the production efficiency of the coated gasket.

[0045] In some embodiments of this application, please refer to Figure 1 , Figure 2 and Figure 4 The guide element is a curved guide vane. The discharge end of the guide element has a preset angle α with the discharge direction of the discharge port, forming a wing-like structure on the edge side of the discharge port. This allows the slurry to diffuse to a certain extent on the outer side of the discharge port edge area, preventing slurry accumulation in the edge area and thus avoiding an excessively thick coating. The shape and size of the guide element can be designed according to the viscosity, flow rate, and coating width of the slurry; no limitations are imposed here.

[0046] Please refer to some preferred embodiments of this application. Figure 2 and Figure 4 The two guide elements on both sides of the discharge port are symmetrically arranged, making the end of the discharge port gradually widen. This reduces the flow velocity of the slurry at the end of the discharge port and guides the slurry to the outer area of ​​the discharge port through the guide elements, avoiding excessive accumulation of slurry at the edge of the discharge port and thus preventing the phenomenon of edge thickening.

[0047] Specifically, a first guide member 31 is provided on the left side of the discharge port, and a second guide member 32 is provided on the right side of the discharge port. The discharge end of the first guide member 31 is inclined to the left front in the discharge direction, and the discharge end of the second guide member 32 is inclined to the right front in the discharge direction, with an inclination angle of α for both. The diffusion of slurry in the edge area of ​​the discharge port can be achieved through the guiding effect of the curved guide plate, avoiding excessive accumulation of slurry in the edge area of ​​the discharge port. In some preferred embodiments of this application, the value of α is in the range of 50°-60°.

[0048] In the above embodiments, the curved guide vane can be a streamlined guide vane or a guide vane with a bending angle, both of which can achieve the purpose of this application. The guide component and the gasket body 1 are an integral structure, which can be integrated and set on the plate 14 of the gasket body 1. This helps to reduce the manufacturing difficulty of the coated gasket, eliminates the assembly process between the guide component 3 and the gasket body 1, and thus improves the production efficiency of the coated gasket.

[0049] In some embodiments of this application, the thickness of the guide element is 50%-60% of the thickness of the gasket body 1. If the slurry has strong fluidity, the thickness of the guide element can be appropriately increased to make it more effective at blocking the slurry. The guide element with a certain thickness plays a role in blocking and guiding the slurry in the edge area of ​​the outlet. After the slurry flows over the guide element, it can diffuse to the edge area of ​​the outlet through the guidance of the guide element.

[0050] In the above embodiments, the coating gasket can be made of SUS304 stainless steel, which has good mechanical properties and corrosion resistance. During the manufacturing process, it is manufactured by precision casting or CNC machining to make the surface of the coating gasket smooth and burr-free, so as to ensure the smooth flow of the slurry; at the same time, it is also necessary to ensure that the dimensional accuracy of the coating gasket meets the design requirements of the coating die head through machining, so as to avoid deformation or scratches during the production process.

[0051] A second aspect of this application provides a coating die head, including the coating pad described in the above embodiments. The coating die head includes an upper die head and a lower die head, with the coating pad sandwiched between the upper die head and the lower die head.

[0052] The bottom of both the turbulence-disrupting element and the flow-guiding element is in contact with the upper surface of the lower die head. Since the thickness of the turbulence-disrupting element is 20%-40% of the thickness of the gasket body 1 (i.e., plate 14), and the thickness of the flow-guiding element is 50%-60% of the thickness of the gasket body 1 (i.e., plate 14), when the upper die head contacts the upper surface of plate 14, gaps exist between the turbulence-disrupting element and the lower surface of the upper die head, and between the flow-guiding element and the lower surface of the upper die head. This facilitates the flow of the slurry through the turbulence-disrupting element or the flow-guiding element within the coating die head. By turbulent and guiding the slurry within the slurry cavity of the coating die head through the turbulence-disrupting element and the flow-guiding element, the coating area formed by the coating die head can achieve good areal density consistency and coating thickness consistency.

[0053] Please see Figures 1 to 4 In some embodiments of this application, the working process of the above-mentioned coated pad is as follows:

[0054] Step 1: The slurry from the coating die head is output from the first outlet 11, the second outlet 12 and the third outlet 13, wherein the slurry flow rate at the first outlet 11 is greater than the slurry flow rate at the second outlet 12 and the third outlet 13.

[0055] Step 2: When the slurry moves to the position of the turbulence unit, the first turbulence unit 21 disturbs the slurry in the first outlet 11, reducing the slurry flow rate in the first outlet 11; the second turbulence unit 22 disturbs the slurry in the right area of ​​the second outlet 12, reducing the slurry flow rate in the right area of ​​the second outlet 12; the third turbulence unit 23 disturbs the slurry in the left area of ​​the third outlet 13, reducing the slurry flow rate in the left area of ​​the third outlet 13, and the slurry flow rate in the first outlet 11 decreases the most, so as to keep the slurry flow rate of the three outlets balanced.

[0056] Step 3: After being blocked and disturbed by the turbulence-disrupting element, the slurry flows over the turbulence-disrupting element and flows to the end of the discharge port. Under the blocking and guiding effect of the flow guide, the slurry velocity in the edge area of ​​the discharge port decreases and diffuses to a certain extent towards the outside of the edge area of ​​the discharge port, avoiding the accumulation of slurry in the edge area of ​​the discharge port and preventing the edge area of ​​the discharge port from being too thick.

[0057] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0058] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0059] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A coated gasket, characterized in that, include: Gasket body (1), wherein the gasket body (1) is provided with one or more discharge ports; A flow-dispersing component (2), the flow-dispersing component (2) comprising a flow-dispersing element disposed within the discharge port; The flow guiding component (3) includes flow guiding elements disposed on both sides of the discharge port.

2. The coated gasket according to claim 1, characterized in that, The number of discharge ports is multiple, and the multiple discharge ports are arranged sequentially along the coating width direction. The turbulence component (2) includes multiple turbulence units, and the multiple turbulence units are arranged one-to-one with the multiple discharge ports.

3. The coated gasket according to claim 2, characterized in that, The plurality of the aforementioned turbulence-disrupting components include a first turbulence-disrupting component (21), a second turbulence-disrupting component (22), and a third turbulence-disrupting component (23). The first turbulence-disrupting component (21) is disposed in the middle of the gasket body (1). The second turbulence-disrupting component (22) and the third turbulence-disrupting component (23) are symmetrically disposed on both sides of the first turbulence-disrupting component (21). The size of the second turbulence-disrupting component (22) and the size of the third turbulence-disrupting component (23) are both smaller than the size of the first turbulence-disrupting component (21).

4. The coated gasket according to any one of claims 1 to 3, characterized in that, The turbulence-disrupting component is a long strip structure, and the length direction of the long strip structure is perpendicular to the discharge direction of the discharge port.

5. The coated gasket according to any one of claims 1 to 3, characterized in that, The turbulence assembly (2) further includes a connector (24) which is connected between the gasket body (1) and the turbulence unit.

6. The coated gasket according to claim 5, characterized in that, Multiple connectors (24) are sequentially arranged along the length of the turbulence-disrupting unit, and the multiple connectors (24), the turbulence-disrupting unit, and the gasket body (1) are an integral structure.

7. The coated gasket according to any one of claims 1 to 3, characterized in that, The guide is a curved guide plate, and there is a preset angle between the discharge end of the guide and the discharge direction of the discharge port.

8. The coated gasket according to any one of claims 1 to 3, characterized in that, The guide members on both sides of the discharge port are symmetrically arranged, so that the end of the discharge port is gradually widened.

9. The coated gasket according to any one of claims 1 to 3, characterized in that, The thickness of the turbulence component is 20%-40% of the thickness of the gasket body (1), and the thickness of the flow guide is 50%-60% of the thickness of the gasket body (1).

10. A coating die head, characterized in that, Includes the coated pad as described in any one of claims 1 to 9.

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