Coating die head and coating device

Abstract

The utility model discloses a coating die head and a coating device, and belongs to the technical field of batteries. The coating die head is used for coating slurry and comprises a first die head, a second die head, a gasket and a first elastic layer, the gasket is arranged between the first die head and the second die head, and the gasket is provided with a first surface facing the first die head and a second surface facing the second die head. Wherein at least part of the first elastic layer is located between the first die head and the first surface, and the elastic modulus of the first elastic layer is smaller than that of the gasket. The first elastic layer is arranged between the first die head and the first surface, so that the risk of material mixing of the coating die head caused by a gap between the first die head and the first surface can be reduced, and the coating quality of the coating die head can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing equipment, and in particular to a coating die head and a coating device. Background Art

[0002] Coating is an essential process in the production of lithium-ion batteries and is also a key process that directly affects battery reliability, capacity, life and other performance. Coating is to evenly, continuously or intermittently coat the prepared paste-like viscous slurry on the substrate (aluminum foil or copper foil). During the coating process, the thickness consistency of each coating position must be ensured and the coating thickness must be controlled within the tolerance range required by the process.

[0003] Therefore, how to improve coating quality is an urgent problem to be solved in the battery manufacturing process. Utility Model Content

[0004] In view of the above problems, the present application provides a coating die head and a coating device, which can improve the coating quality.

[0005] In a first aspect, the present application provides a coating die for coating a slurry, comprising a first die, a second die, a gasket and a first elastic layer, wherein the gasket is disposed between the first die and the second die, and the gasket has a first surface facing the first die and a second surface facing the second die, wherein at least part of the first elastic layer is located between the first die and the first surface, and the elastic modulus of the first elastic layer is less than the elastic modulus of the gasket.

[0006] In the technical solution of the embodiment of the present application, by setting a first elastic layer between the first die head and the first surface, the risk of gaps between the first die head and the first surface causing material cross-linking in the coating die head can be reduced, which is beneficial to improving the coating quality of the coating die head.

[0007] In one or more embodiments of the first aspect, the gasket is made of metal, and the first elastic layer is made of rubber.

[0008] In the above scheme, the metal gasket has a stable structure and a strong shape, which is conducive to the coating die head forming a relatively stable coating width and coating thickness. Rubber has the advantages of low processing difficulty and low cost. At the same time, the rubber itself has a strong elastic deformation ability to fill the gap between the first die head and the first surface, which is conducive to improving the coating quality of the coating die head.

[0009] In one or more embodiments of the first aspect, the thickness of the first elastic layer is T1, satisfying: 0.5 mm≤T1≤1 mm.

[0010] In the above scheme, when T1≤1mm, the compression load required to press the first elastic layer can be reduced, thereby reducing the reaction force of the first elastic layer acting on the first die head and the gasket, which is beneficial to improving the structural stability of the coating die head. When T1≥0.5mm, the first elastic layer can have a higher elastic deformation ability to improve the coating quality of the coating die head. Therefore, when 0.5mm≤T1≤1mm, the coating die head can have both higher structural stability and coating quality.

[0011] In one or more embodiments of the first aspect, the first die head has a third surface facing the gasket, the third surface is provided with a third elastic layer, and the elastic modulus of the third elastic layer is smaller than the elastic modulus of the first die head.

[0012] In the above scheme, providing the third elastic layer on the third surface can further reduce the risk of gaps between the first die head and the first surface causing material cross-talk in the coating die head, which is beneficial to further improve the coating quality of the coating die head.

[0013] In one or more embodiments of the first aspect, the coating die further comprises a second elastic layer, at least a portion of the second elastic layer is located between the second die and the second surface, and an elastic modulus of the second elastic layer is less than an elastic modulus of the gasket.

[0014] In the above scheme, by providing a second elastic layer between the second die and the second surface, the risk of gaps between the second die and the second surface causing material cross-linking in the coating die can be reduced, which is beneficial to improving the coating quality of the coating die.

[0015] In one or more embodiments of the first aspect, the first elastic layer and the second elastic layer are integrally formed.

[0016] In the above solution, forming the first elastic layer and the second elastic layer in an integral manner can simplify the assembly process of the coating die head and reduce the manufacturing cost of the coating die head to a certain extent.

[0017] In one or more embodiments of the first aspect, the second die head has a fourth surface facing the gasket, the fourth surface is provided with a fourth elastic layer, and the elastic modulus of the fourth elastic layer is smaller than the elastic modulus of the second die head.

[0018] In the above scheme, providing the fourth elastic layer on the fourth surface can further reduce the risk of material cross-linking in the coating die due to a gap between the second die and the second surface, which is beneficial to further improve the coating quality of the coating die.

[0019] In one or more embodiments of the first aspect, an outwardly opening adjustment groove and at least two adjustment holes are provided in the first die head, and an adjustment mechanism for adjusting the height of the adjustment groove is provided in the at least two adjustment holes.

[0020] In the above scheme, when the adjustment mechanism is used to adjust the height of the adjustment groove, there is a high risk of a gap between the first die head and the gasket. Providing the first elastic layer can significantly reduce the risk of a gap between the first die head and the first surface, resulting in material cross-linking in the coating die head, which is beneficial for the coating die head to have a higher coating quality.

[0021] In one or more embodiments of the first aspect, the adjustment mechanism is a threaded screw.

[0022] In the above scheme, the use of letter screws as the adjustment mechanism can effectively adjust the coating die head, which is beneficial to improving the coating efficiency.

[0023] In a second aspect, the present application provides a coating device, which includes the coating die head in one or more embodiments of the first aspect.

[0024] In the above scheme, since the coating die in one or more embodiments of the first aspect has a higher coating quality, the coating device including the coating die in one or more embodiments of the first aspect also has a higher coating quality.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of a coating die head according to some embodiments of the present application;

[0028] Figure 2 For this application Figure 1 A partial enlarged view of the middle A;

[0029] Figure 3 A schematic diagram of a partial structure of a coating die head according to some embodiments of the present application;

[0030] Figure 4 For this application Figure 3 A partial enlarged view of point B in the middle;

[0031] Figure 5 A cross-sectional view of a coating die head according to some embodiments of the present application;

[0032] Figure 6 For this application Figure 5 A partial enlarged view of point C in the middle;

[0033] Figure 7 It is a cross-sectional view of a partial structure of a coating die head according to some embodiments of the present application.

[0034] The reference numerals in the specific implementation manner are as follows:

[0035] 100-coating die; 1-first die; 11-third surface; 12-first adjustment hole; 13-second adjustment hole; 14-adjustment groove; 2-second die; 21-fourth surface; 3-gasket; 31-first surface; 32-second surface; 33-notch; 4-first elastic layer; 5-second elastic layer; 6-third elastic layer; 7-fourth elastic layer; 8-adjustment mechanism; 81-adjustment screw; 82-screw; 9-fastening screw. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0041] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0042] In the present application, battery cells may include but are not limited to lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc. The shape of the battery cell may include but is not limited to a cylinder, a flat body, a rectangular parallelepiped or other shapes, etc. The battery cell may include but is not limited to a cylindrical battery cell, a square battery cell, a soft-pack battery cell and a blade battery cell according to the packaging method.

[0043] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0044] Coating is the process of applying a thin layer of coating material in liquid or powder form on the surface of objects such as fabrics, paper, metal foil or plates. Coating is an indispensable step in the manufacturing process of battery cells.

[0045] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on part of the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode active material layer is coated on part of the surface of the negative electrode collector. The negative electrode collector not coated with the negative electrode active material layer serves as a negative electrode ear. The material of the negative electrode collector can be copper, and the negative electrode active material can be carbon or silicon. In order to ensure that a large current is passed without melting, the number of positive electrodes is multiple and stacked together, and the number of negative electrodes is multiple and stacked together.

[0046] In the production process of battery cells, the coating process is used to coat the positive active material on the positive current collector, and the negative active material on the negative current collector. That is, the prepared paste-like viscous slurry (positive active material or negative active material) is evenly, continuously or intermittently coated on the substrate (positive current collector or negative current collector). During coating, the thickness consistency of each coating position must be ensured, and the coating thickness must be controlled within the tolerance range required by the process.

[0047] The coating device used in the coating process includes a coating die, a feed pipe and a slurry tank. The die body generally includes an upper die, a lower die, a feed port and a material cavity. The material cavity is generally arranged on the lower die, and the gap between the upper die and the lower die forms a lip. When the coating device is coating, the slurry in the slurry tank enters the material cavity from the feed port through the feed pipe, and then the slurry flows out of the material cavity and is sprayed out from the lip to be coated on the substrate.

[0048] A gasket is also provided between the upper die and the lower die. In a common coating die, the gasket is provided between the upper die and the lower die. After the upper die and the lower die are fixed, the gasket is also clamped between the two. During the production, processing and assembly process, a gap is easily generated between the upper die and / or the lower die and the gasket. The appearance of the gap will cause the slurry in the coating die to cross and mix, thereby reducing the coating quality of the coating die.

[0049] In view of this, the present application provides a coating die for coating slurry, comprising a first die, a second die, a gasket and a first elastic layer, wherein the gasket is arranged between the first die and the second die, and the gasket has a first surface facing the first die and a second surface facing the second die. At least part of the first elastic layer is located between the first die and the first surface, and the elastic modulus of the first elastic layer is less than the elastic modulus of the gasket. By arranging the first elastic layer between the first die and the first surface, the risk of gaps between the first die and the first surface, which leads to cross-linking of the coating die, can be reduced, which is conducive to improving the coating quality of the coating die.

[0050] The application scenarios of the coating die head disclosed in the embodiments of the present application include but are not limited to coating slurry on positive electrode collectors or negative electrode collectors, coating electronic materials on magnetic cards, circuit boards or chips, and producing packaging boxes, various types of paper or labels.

[0051] The following description will take the coating die head used to coat the active substance on the substrate as an example.

[0052] According to some embodiments of this application, please refer to Figure 1 and Figure 2 The present application provides a coating die 100 for coating a slurry, comprising a first die 1, a second die 2, a gasket 3 and a first elastic layer 4, wherein the gasket 3 is disposed between the first die 1 and the second die 2, and the gasket 3 has a first surface 31 facing the first die 1 and a second surface 32 facing the second die 2. At least part of the first elastic layer 4 is located between the first die 1 and the first surface 31, and the elastic modulus of the first elastic layer 4 is less than that of the gasket 3.

[0053] In some embodiments, a cavity is disposed in the coating die 100 , and the cavity is used to buffer the slurry. The cavity can be disposed in the first die 1 and / or the second die 2 .

[0054] In some embodiments, the first die head 1 and the second die head 2 are detachably connected to each other by a plurality of fastening screws 9. The fastening screws 9 pass through the gasket 3, and the gasket 3 is fixed between the first die head 1 and the second die head 2 after the first die head 1 and the second die head 2 are fixed.

[0055] The material of the first die head 1 and / or the second die head 2 may include but is not limited to metal, ceramic, etc.

[0056] The material of the gasket 3 may include but is not limited to metal, ceramic, etc.

[0057] The first elastic layer 4 may be an elastic member or a coating disposed on the first surface 31 .

[0058] The elastic modulus of the first elastic layer 4 is smaller than that of the gasket 3 , which means that the first elastic layer 4 is more easily deformed than the gasket 3 when subjected to a force.

[0059] There may be processing errors between the first die head 1, the second die head 2 and the gasket 3 after processing, and the existence of processing errors will cause a gap to form between the first die head 1 and the gasket 3. There may also be assembly errors during the assembly process of the above three, and the existence of assembly errors will also form gaps. In the coating production process, if the coating speed is increased, the pressure of the slurry will increase. If there is a gap, the slurry will flow through the gap, causing the coating quality to deteriorate.

[0060] In the technical solution of the embodiment of the present application, by setting the first elastic layer 4 between the first die 1 and the first surface 31, the risk of gaps between the first die 1 and the first surface 31 causing material cross-linking of the coating die 100 can be reduced, which is beneficial to improving the coating quality of the coating die 100.

[0061] According to some embodiments of the present application, the gasket 3 is made of metal, and the first elastic layer 4 is made of rubber.

[0062] The material of the gasket 3 may include but is not limited to stainless steel, copper, aluminum, titanium, etc.

[0063] The material of the first elastic layer 4 may include but is not limited to chlorosulfonated polyethylene rubber, ethylene propylene rubber, butyl rubber, chloroprene rubber and the like.

[0064] In the above scheme, the metal gasket structure is stable and strong, which is conducive to the coating die 100 forming a relatively stable coating width and coating thickness. Rubber has the advantages of low processing difficulty and low cost. At the same time, the strong elastic deformation ability of rubber itself can fill the gap between the first die 1 and the first surface 31, which is conducive to improving the coating quality of the coating die 100.

[0065] According to some embodiments of this application, please refer to Figure 1 and Figure 2 The thickness of the first elastic layer 4 is T1, which satisfies: 0.5 mm ≤ T1 ≤ 1 mm.

[0066] The thickness of the first elastic layer 4 can be any value between 0.5 mm and 1 mm, for example, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm.

[0067] In some embodiments, the upper die clamps the first elastic layer 4 with the gasket 3, and the force applied to the first elastic layer 4 is provided by the adjustment mechanism 8 or the fasteners for fixing the first die 1 and the second die 2. The thicker the gasket 3 is, the stronger the reaction force on the fastener or the adjustment mechanism 8 is, and the higher the risk of damage to the adjustment mechanism 8 or the fastener. The thinner the first elastic layer 4 is, the worse its ability to fill the gap is.

[0068] In the above scheme, when T1≤1mm, the compressive load required to press the first elastic layer 4 can be reduced, thereby reducing the reaction force of the first elastic layer 4 acting on the first die 1 and the gasket 3, which is beneficial to improving the structural stability of the coating die 100. When T1≥0.5mm, the first elastic layer 4 can have a higher elastic deformation ability to improve the coating quality of the coating die 100. Therefore, when 0.5mm≤T1≤1mm, the coating die 100 can have both higher structural stability and coating quality.

[0069] According to some embodiments of this application, please refer to Figure 1 and Figure 2 The first die head 1 has a third surface 11 facing the gasket 3 , and the third surface 11 is provided with a third elastic layer 6 , and the elastic modulus of the third elastic layer 6 is smaller than the elastic modulus of the first die head 1 .

[0070] The third elastic layer 6 may be an elastic member or a coating disposed on the third surface 11 .

[0071] The elastic modulus of the third elastic layer 6 is smaller than that of the first die head 1 , which means that the third elastic layer 6 is more easily deformed than the third die head when subjected to a force.

[0072] In the above solution, providing the third elastic layer 6 on the third surface 11 can further reduce the risk of gaps between the first die 1 and the first surface 31 causing material cross-linking of the coating die 100 , which is beneficial to further improve the coating quality of the coating die 100 .

[0073] According to some embodiments of this application, please refer to Figure 1 and Figure 2 The coating die 100 further includes a second elastic layer 5 , at least part of which is located between the second die 2 and the second surface 32 , and an elastic modulus of the second elastic layer 5 is smaller than an elastic modulus of the gasket 3 .

[0074] The second elastic layer 5 may be an elastic member or a coating disposed on the second surface 32 .

[0075] The elastic modulus of the second elastic layer 5 is smaller than that of the gasket 3 , which means that the second elastic layer 5 is more easily deformed than the gasket 3 when subjected to a force.

[0076] In some embodiments, the coating die 100 includes a first die 1 , a second die 2 , a gasket 3 , a first elastic layer 4 , a second elastic layer 5 , and a third elastic layer 6 .

[0077] In the above scheme, by setting the second elastic layer 5 between the second die 2 and the second surface 32, the risk of gap between the second die 2 and the second surface 32 causing material cross-linking of the coating die 100 can be reduced, which is beneficial to improving the coating quality of the coating die 100.

[0078] According to some embodiments of this application, please refer to Figure 1-Figure 4 , the first elastic layer 4 and the second elastic layer 5 are integrally formed.

[0079] The first elastic layer 4 and the second elastic layer 5 may be integrally formed by providing an elastic coating layer on the outer surface of the gasket 3, and the elastic coating layer covers all outer surfaces of the gasket 3. In some embodiments, the elastic coating layer covers all outer surfaces of the gasket 3. The elastic coating layer may be pre-coated on the gasket 3, and then the elastic coating layer and the gasket 3 are assembled as a whole between the first die 1 and the second die 2. Compared with the method of providing an elastic member, the steps of positioning and shaping the elastic member are omitted.

[0080] In the above solution, integrally forming the first elastic layer 4 and the second elastic layer 5 can simplify the assembly process of the coating die 100 and reduce the manufacturing cost of the coating die 100 to a certain extent.

[0081] According to some embodiments of this application, please refer to Figure 1-Figure 2 The second die head 2 has a fourth surface 21 facing the gasket 3 , and the fourth surface 21 is provided with a fourth elastic layer 7 , and the elastic modulus of the fourth elastic layer 7 is smaller than the elastic modulus of the second die head 2 .

[0082] The fourth elastic layer 7 may be an elastic member or a coating disposed on the fourth surface 21 .

[0083] The elastic modulus of the fourth elastic layer 7 is smaller than that of the second die head 2 , which means that the fourth elastic layer 7 is more easily deformed than the second die head 2 when subjected to a force.

[0084] In some embodiments, the coating die 100 includes a first die 1 , a second die 2 , a gasket 3 , a first elastic layer 4 , a second elastic layer 5 , a third elastic layer 6 , and a fourth elastic layer 7 .

[0085] In some embodiments, the coating die 100 includes a first die 1 , a second die 2 , a gasket 3 , a first elastic layer 4 , a second elastic layer 5 , and a fourth elastic layer 7 .

[0086] In some embodiments, the coating die 100 includes a first die 1 , a second die 2 , a gasket 3 , a first elastic layer 4 , a third elastic layer 6 , and a fourth elastic layer 7 .

[0087] In the above solution, disposing the fourth elastic layer 7 on the fourth surface 21 can further reduce the risk of material cross-linking of the coating die 100 caused by a gap between the second die 2 and the second surface 32 , which is beneficial to further improve the coating quality of the coating die 100 .

[0088] According to some embodiments of this application, please refer to Figure 5-Figure 7 The first die head 1 is provided with an outwardly opening adjustment groove 14 and at least two adjustment holes, and an adjustment mechanism 8 for adjusting the height of the adjustment groove 14 is penetrated in at least the two adjustment holes.

[0089] The adjustment groove 14 may be provided on the first die head 1 and / or the second die head 2 .

[0090] There can be multiple adjustment mechanisms 8, and the adjustment mechanism 8 is set at a position corresponding to the area of ​​the gasket 3 for the slurry to flow out. Figure 3 The above-mentioned area can be formed by processing the notch 33.

[0091] During the coating process, there is usually a situation where the lateral weight of the local area coated on the substrate is adjusted. In this case, the adjustment mechanism 8 is required to cause local micro-deformation of the third surface 11 and / or the fourth surface 21. When the third surface 11 and / or the fourth surface 21 is locally micro-deformed, the risk of a gap between the first die 1 and / or the second die 2 and the gasket 3 increases.

[0092] The transverse weight of the coating slurry usually refers to the weight or mass of the slurry per unit length in the transverse direction (i.e., the direction perpendicular to the coating direction) during the coating process. This indicator can be used to measure the distribution uniformity of the coating slurry on the substrate and the coating quality.

[0093] The two adjustment holes are respectively the first adjustment hole 12 and the second adjustment hole 13. In some embodiments, the first adjustment hole 12 and the second adjustment hole 13 are both arranged on the first die head 1. The first adjustment hole 12 and the second adjustment hole 13 are both connected to the adjustment groove 14. The adjustment mechanism 8 can be a screw, and the screw includes a threaded section and an optical axis section. One of the threaded section and the optical axis section is threadedly connected to the first adjustment hole 12, and the other is fixedly connected to the second adjustment hole 13 (fixed connection means that the relative position with the first die head 1 does not change). The threaded section or the optical axis section is arranged on the side of the screw close to the gasket 3. Since the length of the screw is fixed, the height of the adjustment groove 14 will change during the process of screwing the screw, so that the third surface 11 can be close to or away from the gasket 3 to adjust the flow rate of the slurry flowing out of the coating die head 100.

[0094] In the above scheme, when the height of the adjustment groove 14 is adjusted by the adjustment mechanism 8, there is a high risk of a gap between the first die head 1 and the gasket 3. The provision of the first elastic layer 4 can significantly reduce the risk of a gap between the first die head 1 and the first surface 31, which leads to a cross-linking of the coating die head 100, and is conducive to making the coating die head 100 have a higher coating quality. At the same time, the provision of the first elastic layer 4 can also increase the adjustment range of the adjustment mechanism 8 to a certain extent.

[0095] According to some embodiments of this application, please refer to Figure 5-Figure 7 The adjusting mechanism 8 is a threaded screw.

[0096] In some embodiments, the mother-and-child screw includes an adjusting screw 81 and a sleeve 82, the sleeve 82 is fixedly connected to the second adjusting hole 13, the sleeve 82 is sleeved on the adjusting screw 81 and threadedly connected to the adjusting screw 81, and the distance between the opposite end faces of the adjusting screw 81 and the sleeve 82 can be changed by screwing the adjusting screw 81, thereby adjusting the height of the adjusting groove 14, thereby changing the distance between the third surface 11 and the gasket 3.

[0097] In the above solution, the use of letter screws as the adjustment mechanism 8 can effectively adjust the coating die head 100, which is beneficial to improving the coating efficiency.

[0098] According to some embodiments of the present application, the present application provides a coating device, which includes the coating die 100 in one or more of the above embodiments.

[0099] In the above scheme, since the coating die head 100 in one or more of the above embodiments has a higher coating quality, the coating device including the coating die head 100 in one or more of the above embodiments also has a higher coating quality.

[0100] According to some embodiments of the present application, referring to Figure 1-Figure 7 The present application provides a coating die 100 for coating slurry, comprising a first die 1, a second die 2, a gasket 3 and a first elastic layer 4, wherein the gasket 3 is disposed between the first die 1 and the second die 2, and the gasket 3 has a first surface 31 facing the first die 1 and a second surface 32 facing the second die 2. An adjustment groove 14 with an opening facing outward and at least two adjustment holes are disposed in the first die 1, and a sub-screw for adjusting the height of the adjustment groove 14 is inserted in the at least two adjustment holes.

[0101] The coating die 100 includes a first elastic layer 4, a second elastic layer 5, a third elastic layer 6 and a fourth elastic layer 7, wherein the first elastic layer 4 is disposed on the first surface 31. The coating die 100 also includes a second elastic layer 5, wherein at least a portion of the second elastic layer 5 is located between the second die 2 and the second surface 32. The first die 1 has a third surface 11 facing the gasket 3, and the third elastic layer 6 is disposed on the third surface 11. The second die 2 has a fourth surface 21 facing the gasket 3, and the fourth surface 21 is disposed on the fourth elastic layer 7. The first elastic layer 4 and the second elastic layer 5 are integrally formed.

[0102] The material of the gasket 3 is metal, and the materials of the first elastic layer 4 , the second elastic layer 5 , the third elastic layer 6 and the fourth elastic layer 7 are all rubber.

[0103] Regardless of the gaps caused by processing errors, assembly errors or the adjustment process of the adjustment mechanism 8, the first elastic layer 4, the second elastic layer 5, the third elastic layer 6 and the fourth elastic layer 7 can be filled in time, thereby reducing the risk of cross-linking of the coating die 100.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A coating die head for coating slurry, characterized in that: include: a first die and a second die; A gasket is disposed between the first die head and the second die head, the gasket having a first surface facing the first die head and a second surface facing the second die head; The coating die further comprises a first elastic layer, at least a portion of the first elastic layer is located between the first die and the first surface, and an elastic modulus of the first elastic layer is smaller than an elastic modulus of the gasket.

2. The coating die head according to claim 1, characterized in that: The gasket is made of metal, and the first elastic layer is made of rubber.

3. The coating die head according to claim 1, characterized in that: The thickness of the first elastic layer is T1, which satisfies: 0.5 mm≤T1≤1 mm.

4. The coating die head according to claim 1, characterized in that: The first die head has a third surface facing the gasket, the third surface is provided with a third elastic layer, and the elastic modulus of the third elastic layer is smaller than the elastic modulus of the first die head.

5. The coating die head according to claim 1, characterized in that: The coating die also includes a second elastic layer, at least a portion of the second elastic layer is located between the second die and the second surface, and the elastic modulus of the second elastic layer is less than the elastic modulus of the gasket.

6. The coating die head according to claim 5, characterized in that: The first elastic layer and the second elastic layer are integrally formed.

7. The coating die head according to claim 5, characterized in that: The second die head has a fourth surface facing the gasket, the fourth surface is provided with a fourth elastic layer, and the elastic modulus of the fourth elastic layer is smaller than the elastic modulus of the second die head.

8. The coating die head according to claim 1, characterized in that: The first die head is provided with an outwardly opening adjustment groove and at least two adjustment holes, and at least two of the adjustment holes are provided with adjustment mechanisms for adjusting the height of the adjustment groove.

9. The coating die head according to claim 8, characterized in that: The adjusting mechanism is a threaded screw.

10. A coating device, characterized in that: The coating die comprises the coating die according to any one of claims 1 to 9.

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