Gasket, coating die head and coating machine

Abstract

The gasket comprises a gasket base body, a first sliding part and a second sliding part, specifically, the gasket base body is provided with a first connecting end, a second connecting end and an opening part, the first connecting end and the second connecting end are arranged side by side in a spaced mode, and the opening part is located between the first connecting end and the second connecting end. The first connecting end is provided with a first sliding connection part, and the second connecting end is provided with a second sliding connection part. The first sliding part is in sliding connection with the first sliding connection part, the second sliding part is in sliding connection with the second sliding connection part and is opposite to the first sliding part, and the first sliding part and the second sliding part can slide oppositely or oppositely; the maximum value of the minimum distance between the first sliding part and the second sliding part is larger than or equal to the width size of the opening part. According to the gasket, by adjusting the distance between the first sliding part and the second sliding part, the size of the coating opening of the coating die head of the coating machine is adjusted, the coating opening can be matched with pole pieces of more sizes, and the coating efficiency of the coating machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery coating, in particular to a gasket, a coating die head with the gasket and a coating machine equipped with the coating die head. Background Art

[0002] With the development of the new energy field, the research intensity on the manufacturing of new energy batteries is also increasing, and the research focus is mainly on how to improve the manufacturing efficiency and finished product quality of new energy batteries.

[0003] In batteries, pole pieces are one of the important components of batteries, and their processing quality must be guaranteed to ensure the product quality of the batteries. During the processing of pole pieces, in order to improve the performance and stability of the battery, it is necessary to brush the surface of the pole pieces. By brushing the pole pieces, a uniform coating is formed on the surface of the pole pieces. In this way, the contact area between the electrode and the electrolyte is increased to a certain extent inside the battery, and the charge transfer efficiency is improved; in addition, the coating can also protect the surface of the pole piece from the influence of environmental factors such as maintenance and clothing, thereby extending the service life of the battery.

[0004] During the electrode coating operation, when the electrode passes through the brush die of the coating machine, the coating port size of the brush die is difficult to match with the actual size of the electrode. As a result, the coating size on the surface of the electrode does not match the actual size of the electrode, and the electrode needs to be trimmed accordingly to match the size of the electrode with the size of the coating on its surface. This not only increases the number of electrode processing steps and reduces the electrode processing efficiency, but also, during the electrode trimming operation, the electrode is likely to be damaged due to factors such as human errors and machine errors, thereby causing the electrode to be scrapped.

[0005] To solve the above problems, a gasket structure with a slider is designed in the existing coating machine. The slider on the gasket structure is used to adjust the opening size of the coating head so that the coating head can adapt to the size of the electrode for coating. However, the electrode size that this type of gasket structure can adapt to is limited, and the maximum size of the electrode that it can correspond to is less than or equal to the opening size of the gasket body. Therefore, how to expand the adjustable range of the coating port of the coating head so that the coating head can adapt to coating more electrode sizes has become a technical problem that urgently needs to be solved. Utility Model Content

[0006] In view of this, the present application provides a gasket, a coating die having the gasket, and a coating machine equipped with the coating die. When the coating machine is used for coating operations, the size of the coating port of the coating die can be adjusted by adjusting the structure of the gasket to solve the above-mentioned technical problems.

[0007] A first aspect of an embodiment of the present application provides a gasket, comprising a gasket base, a first sliding part and a second sliding part, wherein the gasket comprises a gasket base, a first sliding part and a second sliding part, specifically, the gasket base is provided with a first connecting end and a second connecting end arranged side by side at an interval, and an opening portion located between the first connecting end and the second connecting end, the first connecting end is provided with a first sliding connection portion, and the second connecting end is provided with a second sliding connection portion; the first sliding part is slidably connected to the first sliding connection portion of the first connecting end, the second sliding part is slidably connected to the second sliding connection portion of the second connecting end, and is arranged opposite to the first sliding part, wherein the first sliding part and the second sliding part can slide toward each other or away from each other, and the maximum value of the minimum distance between the first sliding part and the second sliding part is greater than or equal to the width dimension of the opening portion.

[0008] In the present application, the user adjusts the distance between the first sliding part and the second sliding part in the gasket to adjust the width of the opening that can be formed by the gasket, thereby correspondingly adjusting the size of the coating port of the coating die head using the gasket. Moreover, since the maximum value of the minimum distance between the first sliding part and the second sliding part is greater than or equal to the width size of the opening, the adjustable size range of the coating port is increased, so that the coating die head can match more sizes of pole pieces, thereby improving the coating efficiency of the coater.

[0009] In some embodiments of the first aspect, the first sliding portion has a first end and a second end relative to the first connecting end, wherein the first end can extend into the opening when the first sliding portion slides toward a side of the opening and can slide into the first sliding connection portion when the first sliding portion slides toward a side away from the opening, and the second end is located on a side of the first connecting end away from the opening; and / or the second sliding portion has a third end and a fourth end relative to the second connecting end, wherein the third end can extend into the opening when the second sliding portion slides toward a side of the opening and can slide into the second sliding connection portion when the second sliding portion slides toward a side away from the opening, and the fourth end is located on a side of the second connecting end away from the opening, so that by sliding the first sliding portion and / or the second sliding portion, a coating die head using the gasket can form a coating port larger than the size of the opening, so that the coating die head can adapt to coating pole pieces of more sizes.

[0010] In some embodiments of the first aspect, when the first sliding part and the second sliding part slide toward each other, the minimum value of the minimum distance between the first end and the second end is the sliding distance of the first end when the first end slides to abut against the third end, and / or the minimum value of the minimum distance between the third end and the fourth end is the sliding distance of the third end when the third end slides to abut against the first end. In this way, the coating die head can control the opening and closing state of the coating port by adjusting the first sliding part and the second sliding part.

[0011] In some embodiments of the first aspect, the first sliding portion penetrates the first sliding portion in the sliding direction of the first sliding portion to form a first through groove; the first sliding portion is provided with a first convex portion, and the first convex portion is slidably connected to the first through groove provided at the first connecting end; the second sliding portion penetrates the second sliding portion in the sliding direction of the above-mentioned second sliding portion to form a second through groove, and the second sliding portion is provided with a second convex portion, and the second convex portion is slidably connected to the second through groove provided at the second connecting end. In this way, on the sliding paths of the first sliding portion and the second sliding portion, there is no mutual restriction between the first convex portion and the side wall of the first through groove, and there is no mutual restriction between the second convex portion and the side wall of the second through groove, thereby expanding the size range of the coating port of the coating die head.

[0012] In some embodiments of the first aspect, along the groove depth direction of the first through groove, the maximum cross-sectional width of the first protrusion is greater than the groove opening size of the first through groove; and / or, along the groove depth direction of the second through groove, the maximum cross-sectional width of the second protrusion is greater than the groove opening size of the second through groove, so that, along the groove depth direction of the first through groove, it is difficult for the first protrusion to leave the first through groove from the groove opening of the first through groove, and the first sliding portion can be stably slidably connected to the first connecting end; and / or, along the groove depth direction of the second through groove, it is difficult for the second protrusion to leave the second through groove from the groove opening of the second through groove, and the second sliding portion can be stably slidably connected to the second connecting end.

[0013] In some embodiments of the first aspect, the first through groove and / or the second through groove is a dovetail groove, and the first protrusion and / or the second protrusion is a dovetail protrusion, so that the first sliding part is stably slidably connected to the first connecting end, and / or the second sliding part is stably slidably connected to the second connecting end.

[0014] In some embodiments of the first aspect, in the sliding direction of the first sliding part, the first protrusion is equal to the first sliding part; in the sliding direction of the second sliding part, the second protrusion is equal to the second sliding part. In this way, on the sliding path of the first sliding part, the first protrusion is always located in the first sliding groove, and on the sliding path of the second sliding part, the second protrusion is always located in the second sliding groove, so that the first sliding part and the second sliding part can both be stably slidably connected to the gasket base.

[0015] In some embodiments of the first aspect, the surface of the first sliding part and / or the second sliding part is provided with size marks, so that when the user operates to move the first sliding part and / or the second sliding part, the moving distance of the first sliding part and / or the second sliding part, and the distance between the first sliding part and the second sliding part can be known by reading the data of the size marks, so that the coating port size of the coating die head can be known.

[0016] In some embodiments of the first aspect, the first sliding part and / or the second sliding part is provided with an adjustment through hole. When the first sliding part and / or the second sliding part is difficult to move, the adjustment through hole can be drilled with the help of a tool to move the first sliding part and / or the second sliding part.

[0017] In some embodiments of the first aspect, the gasket also includes a third sliding part and a fourth sliding part, the third sliding part is used to replace the first sliding part, and the fourth sliding part is used to replace the second sliding part, wherein the chamfer of the third sliding part is different from that of the first sliding part, and the chamfer of the fourth sliding part is different from that of the second sliding part. In this way, when the coating viscosity used by the coating die is different, the sliding part can be replaced accordingly to ensure uniform distribution of the coating on the surface of the pole piece and ensure the coating quality of the pole piece.

[0018] The second aspect of the embodiment of the present application provides a coating die, including a first die, a second die and the above-mentioned gasket, the first die and the second die are stacked to limit a coating cavity; the gasket substrate is arranged in the coating cavity, and the first die and the second die are spaced apart to form a coating port of a connecting opening, the coating cavity is connected to the outside through the coating port, the first sliding part and the second sliding part are at least partially exposed to the outside through the coating port, and the size of the coating port is adjusted by adjusting the distance between the first sliding part and the second sliding part, so that the size of the coating port matches the size of the pole piece.

[0019] A third aspect of an embodiment of the present application provides a coating machine, including a frame and the above-mentioned coating die head, wherein the coating die head is installed on the frame to perform coating operations on a substrate. The coating machine can be adapted to coat electrodes of various sizes and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a simplified schematic diagram of the local structure of the coating machine in this application;

[0022] Figure 2 for Figure 1 A simplified schematic diagram of the front structure of the coating die;

[0023] Figure 3 for Figure 1 A schematic diagram of the front structure of the middle gasket;

[0024] Figure 4 for Figure 3 Sectional view of the AA section;

[0025] Figure 5 for Figure 3 Other possible cross-sectional views at the AA section;

[0026] Figure 6 for Figure 3 The enlarged view of point B in the middle;

[0027] Figure 7 for Figure 3 A schematic diagram of the structure of the middle gasket matrix;

[0028] Figure 8 for Figure 3 A schematic structural diagram of the first sliding part;

[0029] Fig. 9 for Figure 3 Schematic diagram of the structure of the third sliding part and the fourth sliding part.

[0030] Description of Figure Numbers:

[0031] 1-coating machine, 10-coating die, 11-first die, 12-second die, 13-coating cavity, 14-coating port, 100-gasket, 110-gasket base, 111-first connecting end, 1111-first sliding portion, 1111a-first through groove, 112-second connecting end, 1121-second sliding portion, 1121a-second through groove, 113-opening portion, 120-first sliding portion, 121-first end, 122-second end, 123-first convex portion, 124-first chamfer, 125-size mark, 126-adjusting through hole, 130-second sliding portion, 131-third end, 132-fourth end, 140-third sliding portion, 141-second chamfer, 150-fourth sliding portion, 20-frame. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application is clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application.

[0033] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meaning as understood by a person of ordinary skill in the field to which this application belongs. The words "one", "an" or "the" and the like used in this application do not indicate a quantitative limitation, but are only used to indicate the presence of at least one. The words "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0034] 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.

[0035] The following will be combined with the attached examples of the present application Figure 1-Figure 9 , clearly and completely describe the technical solutions in the embodiments of the present application, as well as the prior art embodiments related to the present application.

[0036] It should be understood that pole piece coating is an important step in the manufacturing process of lithium-ion batteries. It is of great significance to the performance, safety and reliability of lithium batteries. It is one of the key links in the battery manufacturing process and will directly affect the quality and market competitiveness of the final battery products. Therefore, in order to improve the processing quality and operation efficiency of pole piece coating, a coating machine 1 is provided in this application, which can be referred to as Figure 1 and Figure 2 The coating machine 1 includes a frame 20 and a coating die 10, and the coating die 10 is installed on the frame 20 to perform coating operations on the pole piece, wherein the coating die 10 includes a first die 11, a second die 12 and a gasket 100, the first die 11 and the second die 12 are stacked to limit a coating cavity 13; the gasket 100 includes a gasket base 110, a first sliding part 120 and a second sliding part 130, and the first sliding part 120 and the second sliding part 130 are slidably connected to the gasket The substrate 110 and the gasket substrate 110 are arranged in the coating cavity 13, and the first die head 11 and the second die head 12 are spaced apart to form a coating port 14 communicating with the opening portion 113. The coating cavity 13 is connected to the outside through the coating port 14. The first sliding portion 120 and the second sliding portion 130 are at least partially exposed to the outside through the coating port 14. The size of the coating port 14 is adjusted by adjusting the distance between the first sliding portion 120 and the second sliding portion 130 so as to match the size of the electrode.

[0037] Parts of the first sliding part 120 and the second sliding part 130 are exposed to the outside world, so as to provide a certain operable surface for the user, so that the user can fiddle with the first sliding part 120 and the second sliding part 130 to make the first sliding part 120 and the second sliding part 130 relatively close to or away from each other. When the first sliding part 120 abuts against the second sliding part 130, the first sliding part 120, the second sliding part 130 and the gasket substrate 110 jointly close the coating port 14, that is, the slurry inside the coating cavity 13 cannot flow out of the coating port 14; and when the first sliding part 120 and the second sliding part 130 move relatively away from each other, the coating port 14 is closed by the first sliding part 120, the second sliding part 130 and the gasket substrate 110. When a certain distance is formed between the two, the partial coating port 14 located between the first sliding part 120 and the second sliding part 130 connects the coating cavity 13 and the outside world, so that the slurry inside the coating cavity 13 can flow to the outside world along the partial coating port 14 to reach the surface of the pole piece. In this way, the user can quickly adjust the distance between the first sliding part 120 and the second sliding part 130 according to the actual size of the pole piece, so that the size of the coating port 14 can be quickly matched to the actual size of the pole piece, so that the surface of the pole piece can be coated with slurry of a matching size, thereby reducing the defective rate of the pole piece coating and improving the processing efficiency of the pole piece coating operation.

[0038] It should also be noted that the coating machine 1 in the present application can also be applied to other substrates that require coating operations. The substrate can not only be the electrode mentioned above, but also paper, cloth, plastic film, etc. After processing the substrate, a composite material that meets user needs can be produced.

[0039] For reference Figure 3 The present application also mentions a gasket 100, which includes a gasket base 110, a first sliding portion 120 and a second sliding portion 130, wherein the gasket 100 includes the gasket base 110, the first sliding portion 120 and the second sliding portion 130, specifically, the gasket base 110 is provided with a first connecting end 111 and a second connecting end 112 arranged side by side at intervals, and an opening portion 113 located between the first connecting end 111 and the second connecting end 112, the first connecting end 111 is provided with a first sliding portion 1111, The second connecting end 112 is provided with a second sliding portion 1121; the first sliding portion 120 is slidably connected to the first sliding portion 1111 of the first connecting end 111, and the second sliding portion 130 is slidably connected to the second sliding portion 1121 of the second connecting end 112, and is arranged opposite to the first sliding portion 120, wherein the first sliding portion 120 and the second sliding portion 130 can slide toward each other or slide away from each other, and the maximum value of the minimum distance between the first sliding portion 120 and the second sliding portion 130 is greater than or equal to the width dimension of the opening 113.

[0040] Specifically, the user moves the first sliding part 120 and the second sliding part 130 in the gasket 100, that is, by adjusting the distance between the first sliding part 120 and the second sliding part 130 in the gasket 100, to quickly adjust the opening width that can be formed by the gasket 100, thereby correspondingly adjusting the size of the coating port 14 of the coating die head 10 using the gasket 100, so that the size of the coating port 14 can match the size of the electrode, thereby improving the coating efficiency of the coater 1, and the electrode after the coating operation of the coater 1 in the present application no longer needs to be subjected to edge cutting, waste picking and other operations, thereby improving the coating quality of the coater 1.

[0041] In addition, in the existing gasket 100 structure, the movement of the slider arranged on the gasket body is limited by the inner wall of the gasket body, and the maximum value of the minimum distance between the two relatively arranged sliders is less than or equal to the width of the opening of the gasket body. In the present application, the maximum value of the minimum distance between the first sliding part 120 and the second sliding part 130 of the gasket 100 is greater than or equal to the width of the opening 113. Therefore, compared with the existing gasket structure, the gasket 100 in the present application can adjust a larger range of coating ports 14. Therefore, the coating die 10 using the gasket 100 can be adaptively coated on more sizes of pole pieces. In this way, the range of pole piece sizes that can be coated by the coater 1 is expanded. When pole pieces of different sizes need to be coated, it is no longer necessary to frequently replace gaskets 100 of different specifications, which saves production costs and improves the coating process efficiency to a certain extent.

[0042] Among them, in the above embodiment, since the size of the coating port 14 is limited by the relative spacing between the first sliding part 120 and the second sliding part 130, within the sliding range of the first sliding part 120 and the second sliding part 130, the spacing between the two opposite ends of the first sliding part 120 and the second sliding part 130 can be greater than the width dimension of the opening 113, so that the size of the coating port 14 can be greater than the size of the opening 113. In this way, the coating die head 10 can match more pole pieces of different sizes, that is, when the coating machine 1 corresponds to coating pole pieces of various sizes, the first sliding part 120 and the second sliding part 130 can be moved to adjust the corresponding relationship between the coating port 14 and the pole piece size without replacing gaskets 100 of different sizes, thereby improving the operating efficiency of the coating machine 1. At the same time, there is no need to produce multiple models of gaskets 100, saving the production cost of the gasket 100 used for the coating machine 1.

[0043] You can continue to refer to Figure 3In some embodiments, the first sliding portion 120 has a first end 121 and a second end 122 relative to the first connecting end 111, wherein the first end 121 can extend into the opening portion 113 when the first sliding portion 120 slides on the side toward the opening portion 113 and can slide into the first sliding connection portion 1111 when the first sliding portion 120 slides on the side away from the opening portion 113, and the second end 122 is located on the side of the first connecting end 111 away from the opening portion 113; and / or, the second sliding portion 130 has a third end 131 and a fourth end 132 relative to the second connecting end 112, wherein the third end 131 can extend into the opening portion 113 when the second sliding portion 130 slides on the side toward the opening portion 113 and can slide into the second sliding connection portion 1121 when the second sliding portion 130 slides on the side away from the opening portion 113, and the fourth end 132 is located on the side of the second connecting end 112 away from the opening portion 113.

[0044] When the first end 121 enters the first sliding portion 1111 and the third end 131 enters the second sliding end, the distance between the first end 121 and the third end 131 is greater than the opening size of the opening portion 113, that is, the distance between the first sliding portion 120 and the second sliding portion 130 is greater than the opening size of the opening portion 113. In this way, by sliding the first sliding portion 120 and / or the second sliding portion 130, the coating die 10 using the gasket 100 can form a coating port 14 larger than the size of the opening portion 113, so that the coating die 10 can adapt to coating more sizes of pole pieces, thereby improving the coating efficiency of the coating machine 1.

[0045] Further, please refer to Figure 3 and Figure 8 In some embodiments, when the first sliding portion 120 and the second sliding portion 130 slide toward each other, the minimum value of the minimum distance between the first end 121 and the second end 122 is the sliding distance of the first end 121 when the first end 121 slides to abut against the third end 131, and / or the minimum value of the minimum distance between the third end 131 and the fourth end 132 is the sliding distance of the third end 131 when the third end 131 slides to abut against the first end 121. In this way, on the sliding path of the first sliding portion 120 and / or the second sliding portion 130, the first sliding portion 1 20 and / or the second sliding part 130 can always maintain a sliding connection relationship with the gasket base 110, that is, the first sliding part 120 and / or the second sliding part 130 will not separate from the gasket base 110, so that the first sliding part 120 and / or the second sliding part 130 is difficult to separate from the coating chamber 13, so that, during the use of the coater 1, the gasket 100 can always maintain its own adjustment function, that is, the coating die head 10 can control the size of the coating port 14 by adjusting the distance between the first sliding part 120 and the second sliding part 130.

[0046] In addition, when the first end 121 abuts the third end 131, the size of the coating port 14 limited by the first sliding part 120 and the second sliding part 130 and the gasket substrate 110 and the coating cavity 13 is 0, that is, the first sliding part 120 and the second sliding part 130 jointly close the coating cavity 13. At this time, the slurry in the coating cavity 13 cannot flow to the outside due to the loss of the path connecting to the outside. At this time, the electrode piece can be adjusted, or the electrode piece that has been coated can be removed from the material roller. In this way, the coating head can also control the opening and closing state of the coating port 14 by adjusting the first sliding part 120 and the second sliding part 130. When there is no need to perform the coating operation, the first sliding part 120 and the second sliding part 130 can be temporarily adjusted to the abutment state to close the coating cavity 13 to prevent the slurry in the coating cavity 13 from continuing to flow out.

[0047] For reference Figure 7 In some embodiments, the first sliding portion 1111 penetrates the first sliding portion 1111 in the sliding direction of the first sliding portion 120 to form a first through groove 1111a; the first sliding portion 120 is provided with a first convex portion 123, and the first convex portion 123 is slidably connected to the first through groove 1111a provided at the first connecting end 111; the second sliding portion 1121 penetrates the second sliding portion 1121 in the sliding direction of the second sliding portion 130 to form a second through groove 1121a, and the second sliding portion 130 is provided with a second convex portion, and the second convex portion The first sliding part 120 and the second sliding part 130 are slidably connected to the second through groove 1121a provided at the second connecting end 112, so that, on the sliding path of the first sliding part 120 and the second sliding part 130, there is no mutual restriction between the first protrusion 123 and the side wall of the first through groove 1111a, and there is no mutual restriction between the second protrusion and the side wall of the second through groove 1121a, that is, the sliding distance between the first sliding part 120 and the second sliding part 130 is correspondingly enlarged, thereby expanding the size range of the coating port 14 of the coating die head 10, so that the coating machine 1 can adapt to coating electrodes of larger sizes.

[0048] It should be noted that, in some embodiments, in order to reduce the difficulty of processing, the specific structure of the second protrusion is set identically to the first protrusion 123. Thus, when processing the first protrusion 123 and the second protrusion, the same mold can be used without the need for an additional casting mold, thereby reducing the difficulty of processing the gasket 100 and also reducing the processing cost of the gasket 100 to a certain extent.

[0049] Please refer to Figure 5 , and combined with reference Figure 7In some embodiments, along the groove depth direction of the first through groove 1111a, the maximum cross-sectional width of the first protrusion 123 is greater than the groove size of the first through groove 1111a; and / or, along the groove depth direction of the second through groove 1121a, the maximum cross-sectional width of the second protrusion is greater than the groove size of the second through groove 1121a, so that along the groove depth direction of the first through groove 1111a, the first protrusion 123 and the groove wall of the first through groove 1111a can be mutually limited, so that the first protrusion 1 23 is difficult to leave the first through groove 1111a from the groove opening of the first through groove 1111a, and the first sliding portion 120 can be stably slidably connected to the first connecting end 111; and / or, along the groove depth direction of the second through groove 1121a, the second protrusion and the groove wall of the second through groove 1121a can be mutually limited, so that the second protrusion is difficult to leave the second through groove 1121a from the groove opening of the second through groove 1121a, and the second sliding portion 130 can be stably slidably connected to the second connecting end 112.

[0050] In some embodiments, Figure 4 As shown, the first through groove 1111a and / or the second through groove 1121a are dovetail grooves, and the first protrusion 123 and / or the second protrusion are dovetail protrusions, so that the first sliding part 120 is stably slidably connected to the first connecting end 111, and / or the second sliding part 130 is stably slidably connected to the second connecting end 112, so that in the groove depth direction of the first through groove 1111a, the first protrusion 123 and the first through groove 1111a can be interlocked, so that the first protrusion 123 can slide stably Connected to the first connecting end 111, the first protrusion 123 will not disengage from the first slide groove along the groove depth direction of the first slide groove, that is, the first sliding part 120 is stably slidably connected to the first connecting end 111; and / or, an interlocking can be formed between the second protrusion and the second through groove 1121a, so that the second protrusion is stably slidably connected to the second connecting end 112, and the second protrusion will not disengage from the second slide groove along the groove depth direction of the second slide groove, that is, the second sliding part 130 is stably slidably connected to the second connecting end 112.

[0051] Also refer to Figure 5 , Figure 5 Several other shapes of first protrusions 123 and first through grooves 1111a matching the first protrusions 123 are also shown, wherein in Figure (a), the cross-sectional diameter at the notch of the first through groove 1111a is smaller than the maximum diameter of the spherical groove, and in Figure (b), the notch size of the first through groove 1111a is smaller than the size of the groove body below, so that when the first protrusion 123 is slidably connected in the first through groove 1111a, the first protrusion 123 will not detach from the gasket base 110 from the first through groove 1111a.

[0052] In some embodiments, in the sliding direction of the first sliding part 120, the first protrusion 123 is equal to the first sliding part 120; in the sliding direction of the second sliding part 130, the second protrusion is equal to the second sliding part 130. In this way, on the sliding path of the first sliding part 120, the first protrusion 123 is always located in the first slide groove, and on the sliding path of the second sliding part 130, the second protrusion is always located in the second slide groove, so that the first sliding part 120 and the second sliding part 130 can be stably slidably connected to the gasket base 110, thereby avoiding the first sliding part 120 and the second sliding part 130 from being separated from the gasket base 110 and affecting the coating effect of the coating die 10.

[0053] For reference Figure 8 and Fig. 9 In some embodiments, a size mark 125 is provided on the surface of the first sliding part 120 and / or the second sliding part 130. Thus, when the user operates to move the first sliding part 120 and / or the second sliding part 130, the moving distance of the first sliding part 120 and / or the second sliding part 130 and the distance between the first sliding part 120 and the second sliding part 130 can be known by reading the data of the size mark 125, so as to know the size of the coating port 14 of the coating die head 10. Thus, the user can adjust the first sliding part 120 and the second sliding part 130 conveniently and efficiently, thereby improving the coating efficiency of the coating machine 1.

[0054] Please refer to Figure 3 and Figure 8 In some embodiments, the first sliding part 120 and / or the second sliding part 130 are provided with an adjustment hole 126. When the first sliding part 120 and / or the second sliding part 130 are difficult to move, the adjustment hole 126 can be pierced with the help of a tool to move the first sliding part 120 and / or the second sliding part 130. In this way, it is easier for the user to operate the first sliding part 120 and / or the second sliding part 130, so that the gasket 100 is more in line with the actual usage needs of the user.

[0055] It should be noted that, during the use of the coating die head 10, the first sliding portion 120 and / or the second sliding portion 130 of the gasket 100 may be stained with slurry. In this way, when the user needs to adjust the first sliding portion 120 and / or the second sliding portion 130, the first sliding portion 120 and / or the second sliding portion 130 will slide against the user's hand or handheld tool, making it difficult for the user to operate the first sliding portion 120 and / or the second sliding portion 130, thereby failing to adjust the size of the coating port 14. However, when the first sliding portion 120 and / or the second sliding portion 130 After the adjustment through hole 126 is opened, the user can hold a rod-shaped, hook-shaped or other tool and pass one end of the rod-shaped tool through the adjustment through hole 126 so that a mutual abutment can be formed between the rod-shaped tool and the inner wall of the adjustment through hole 126. In this way, when the user moves the rod-shaped, hook-shaped or other tool, the first sliding part 120 and / or the second sliding part 130 can move synchronously with the rod-shaped, hook-shaped or other tool. At this time, the movement of the first sliding part 120 and / or the second sliding part 130 is no longer disturbed by the slurry on its surface, so that the gasket 100 is more in line with the needs of users and the ease of use of the gasket 100 is improved.

[0056] For reference Figure 6 , Figure 8 and Fig. 9 In some embodiments, the gasket 100 further includes a third sliding portion 140 and a fourth sliding portion 150, wherein the third sliding portion 140 is used to replace the first sliding portion 120, and the fourth sliding portion 150 is used to replace the second sliding portion 130, wherein the chamfer of the third sliding portion 140 is different from that of the first sliding portion 120, and the chamfer of the fourth sliding portion 150 is different from that of the second sliding portion 130. For ease of understanding, the chamfers of the first sliding portion 120 and the second sliding portion 130 are referred to as first chamfers 124, and the chamfers of the third sliding portion 140 and the fourth sliding portion 150 are referred to as second chamfers 141, that is, the first chamfer 124 is different from the second chamfer 141. In this way, when the coating viscosity used by the coating die 10 is different, the sliding portion can be replaced accordingly to ensure uniform distribution of the coating on the surface of the pole piece and to ensure the coating quality of the pole piece.

[0057] Specifically, in the process of the slurry flowing from the coating port to the surface of the electrode, the slurry near the first sliding part 120 and the second sliding part 130 will experience flow slowdown and accumulation due to the limiting effect. In addition, since the viscosity of the slurry required for coating different electrodes is different, in order to avoid the formation of bulges, thick edges and other adverse processing effects at the two edges of the electrode when the slurry is coated on the surface of the electrode, a plurality of sets of sliding parts with different chamfers are provided corresponding to slurries of different viscosities (such as: the first sliding part 120 and the second sliding part 130 of the first chamfer 124, and the third sliding part 140 and the fourth sliding part 150 of the second chamfer 141). The different chamfers guide the flow of slurries of different viscosities to avoid the formation of bulges, thick edges and other adverse conditions at the two edges of the electrode after coating, thereby improving the coating effect.

[0058] In addition, the gasket 100 can overcome the poor processing conditions such as bulging and thick edges during the coating operation by simply replacing the third sliding part 140, the fourth sliding part 150 (or more sliding parts) with different chamfers without replacing the gasket 100 as a whole. Therefore, in this part of the embodiment, the gasket base 110 can always be stably placed in the coating chamber 13 without replacement. For slurries with different viscosities, only the sliding parts with different chamfers need to be replaced. In this way, the material cost of the coating die head and the coating machine 1 is saved to a certain extent, and resources are saved.

[0059] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0060] As described above, 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A gasket, characterized in that: include: A gasket base body, provided with a first connecting end and a second connecting end spaced apart and arranged side by side, and an opening portion located between the first connecting end and the second connecting end, wherein the first connecting end is provided with a first sliding portion, and the second connecting end is provided with a second sliding portion; A first sliding portion, slidably connected to the first sliding connection portion of the first connection end; a second sliding portion, slidably connected to the second sliding connection portion of the second connection end and arranged opposite to the first sliding portion; The first sliding part and the second sliding part can slide toward each other or away from each other, and the maximum value of the minimum distance between the first sliding part and the second sliding part is greater than or equal to the width of the opening.

2. The gasket according to claim 1, characterized in that The first sliding portion has a first end and a second end relative to the first connecting end, wherein the first end can extend into the opening portion when the first sliding portion slides toward one side of the opening portion and can slide into the first sliding connection portion when the first sliding portion slides toward a side away from the opening portion, and the second end is located on a side of the first connecting end away from the opening portion; and / or the second sliding portion has a third end and a fourth end relative to the second connecting end, wherein the third end can extend into the opening portion when the second sliding portion slides toward one side of the opening portion and can slide into the second sliding connection portion when the second sliding portion slides toward a side away from the opening portion, and the fourth end is located on a side of the second connecting end away from the opening portion.

3. The gasket according to claim 2, characterized in that When the first sliding part and the second sliding part slide toward each other, the minimum value of the minimum distance between the first end and the second end is the sliding distance of the first end when the first end slides to abut against the third end; And / or, the minimum value of the minimum distance between the third end and the fourth end is the sliding distance of the third end when the third end slides to abut against the first end.

4. The gasket according to claim 1, characterized in that The first sliding connection portion penetrates the first sliding connection portion in the sliding direction of the first sliding portion to form a first through groove; the first sliding portion is provided with a first convex portion, and the first convex portion is slidably connected to the first through groove provided at the first connection end; The second sliding portion penetrates the second sliding portion in the sliding direction of the second sliding portion to form a second through groove, and the second sliding portion is provided with a second convex portion, and the second convex portion is slidably connected to the second through groove provided at the second connection end.

5. The gasket according to claim 4, characterized in that Along the groove depth direction of the first through groove, the maximum cross-sectional width of the first protrusion is greater than the groove opening size of the first through groove; and / or, along the groove depth direction of the second through groove, the maximum cross-sectional width of the second protrusion is greater than the groove opening size of the second through groove.

6. The gasket according to claim 5, characterized in that The first through groove and / or the second through groove is a dovetail groove, and the first convex portion and / or the second convex portion is a dovetail convex portion.

7. The gasket according to claim 4, characterized in that In a sliding direction of the first sliding portion, the first convex portion is equal to the first sliding portion; in a sliding direction of the second sliding portion, the second convex portion is equal to the second sliding portion.

8. The gasket according to claim 1, characterized in that Size marks are provided on the surfaces of the first sliding part and / or the second sliding part.

9. The gasket according to claim 1, characterized in that The first sliding part and / or the second sliding part is provided with an adjustment through hole.

10. The gasket according to any one of claims 1 to 9, characterized in that: The gasket further includes a third sliding part and a fourth sliding part, wherein the third sliding part is used to replace the first sliding part, and the fourth sliding part is used to replace the second sliding part, wherein the chamfer of the third sliding part is different from that of the first sliding part, and the chamfer of the fourth sliding part is different from that of the second sliding part.

11. A coating die head, characterized in that: It includes a first die head, a second die head and the gasket described in any one of claims 1 to 10, the first die head and the second die head are overlapped to limit a coating cavity; the gasket substrate is arranged in the coating cavity, and the first die head and the second die head are spaced apart to form a coating port connected to the opening portion, the coating cavity is connected to the outside through the coating port, and at least part of the first sliding portion and the second sliding portion are exposed to the outside through the coating port.

12. A coating machine, characterized in that: It comprises a frame and the coating die head according to claim 11, wherein the coating die head is installed on the frame to perform coating operation on the substrate.

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