Gasket assembly, coating device and coating machine

Abstract

The utility model provides a gasket assembly, a coating device and a coater, the gasket assembly comprises a first gasket, a second gasket and a third gasket, the first gasket comprises a first edge, a second edge, a third edge and a fourth edge which are connected in sequence, the second gasket is arranged on one side of the first gasket and connected with the second edge, and the third gasket is arranged on the other side of the first gasket. The third gasket is arranged on the other side of the first gasket and connected with the fourth edge, and the first edge of the first gasket, the second gasket and the third gasket form a coating opening. The gasket assembly is composed of the first gasket, the second gasket and the third gasket, and in the coating process of battery slurry, if the model of a coated battery is changed, the first gasket, the second gasket and the third gasket of different sizes and specifications can be switched so that coating openings of different widths can be formed in the gasket assembly; therefore, the gasket assembly can adapt to the battery pole pieces with different widths, a gasket does not need to be redesigned to meet the size requirement of the pole pieces in the battery, and the coating efficiency of the battery is improved.

Description

Technical Field

[0001] This application relates to the technical field of battery coating gaskets, and particularly relates to a gasket assembly, a coating device, and a coating machine. Background Art

[0002] A battery coating gasket is a component used in the manufacturing process of lithium-ion batteries. The extrusion coating gasket needs to be designed in a fixed manner according to the designed size specifications of the battery cell, and each gasket can only correspond to one size; when the size of the battery cell needs to be changed, a new gasket needs to be designed to meet the requirements of the electrode sheet size in the battery cell. In other words, in the related art, when the size of the coated battery cell changes, a new size gasket needs to be designed, and the design of a new size gasket requires a long cycle, which is not conducive to improving the efficiency of battery coating. Summary of the Utility Model

[0003] The purpose of this application is to provide a gasket assembly, a coating device, and a coating machine to solve the technical problem in the related art that when the size of the coated battery cell changes, a new size gasket needs to be designed, which is not conducive to improving the efficiency of battery coating.

[0004] In a first aspect, this application provides a gasket assembly, including:

[0005] A first gasket, including a first side, a second side, a third side, and a fourth side connected in sequence. The first gasket further includes a plurality of first positioning holes, and the plurality of first positioning holes are arranged in sequence along the direction of the third side;

[0006] A second gasket, disposed on one side of the first gasket and connected to the second side. The second gasket includes a plurality of second positioning holes, and the plurality of second positioning holes are arranged along the extending direction of the plurality of first positioning holes; and

[0007] A third gasket, disposed on the other side of the first gasket and connected to the fourth side. The third gasket includes a plurality of third positioning holes, and the plurality of third positioning holes are arranged along the extending direction of the plurality of first positioning holes. Among them, the first side of the first gasket, the side of the second gasket close to the first gasket, and the side of the third gasket close to the second gasket form a coating opening.

[0008] In the gasket assembly provided by the present application, the first gasket includes a first side, a second side, a third side, and a fourth side connected in sequence. The first gasket further includes a plurality of first positioning holes arranged in sequence along the direction of the third side. The second gasket is disposed on one side of the first gasket and connected to the second side. The second gasket includes a plurality of second positioning holes arranged along the extending direction of the plurality of first positioning holes. The third gasket is disposed on the other side of the first gasket and connected to the fourth side. The third gasket includes a plurality of third positioning holes arranged along the extending direction of the plurality of first positioning holes. Among them, the first side of the first gasket, the side of the second gasket close to the first gasket, and the side of the third gasket close to the second gasket form a coating opening. The gasket assembly is composed of the first gasket, the second gasket, and the third gasket. During the coating process of the battery slurry, when the battery model to be coated changes, different-width coating openings can be formed in the gasket assembly by switching the first gasket, the second gasket, and the third gasket of different size specifications, so that the gasket assembly can be adapted to battery electrodes of different widths, and there is no need to redesign the gasket to meet the requirements of the electrode size in the battery, which is beneficial to improving the efficiency of battery coating.

[0009] Among them, the size of the second gasket along a preset direction is greater than the size of the first gasket along the preset direction, and in the side of the second gasket close to the first gasket, the part exceeding the first gasket forms a first opening edge, where the preset direction is the extending direction of the second side and the fourth side in the first gasket;

[0010] The size of the third gasket along the preset direction is greater than the size of the first gasket along the preset direction, and in the side of the third gasket close to the first gasket, the part exceeding the first gasket forms a second opening edge, and the first opening edge and the second opening edge are arranged opposite to each other to form the coating opening.

[0011] Among them, a first guiding flow channel is provided on the second gasket, the first guiding flow channel is arranged close to the coating opening, and the first guiding flow channel is used for coating ceramic slurry; a second guiding flow channel is provided on the third gasket, the second guiding flow channel is arranged close to the coating opening, and the second guiding flow channel is used for coating ceramic slurry.

[0012] Among them, a first chamfering portion is provided on the side of the second gasket facing the first gasket, and the first chamfering portion is arranged adjacent to the first guiding flow channel; a second chamfering portion is provided on the side of the third gasket facing the first gasket, and the second chamfering portion is arranged adjacent to the second guiding flow channel.

[0013] Among them, a first opening is provided on the first opening edge, and the first opening is used for passing the battery slurry; a second opening is provided on the second opening edge, and the second opening is used for passing the battery slurry.

[0014] In a second aspect, the present application provides a coating device, which includes a first die head, a second die head and the gasket assembly. The first die head and the second die head are arranged opposite to each other at an interval to form an extrusion gap, and the gasket assembly is arranged in the extrusion gap.

[0015] Among them, the second die head includes a first accommodating cavity for accommodating battery slurry, and the first accommodating cavity communicates with the coating opening.

[0016] Among them, the first die head includes a second accommodating cavity for accommodating ceramic slurry, and the second accommodating cavity communicates with the first guiding flow channel of the second gasket and the second guiding flow channel of the third gasket.

[0017] Among them, the coating device further includes a plurality of fixing members. A plurality of first fixing holes are provided on the first die head, and a plurality of second fixing holes are provided on the second die head. The first fixing holes and the second fixing holes correspond to each other one by one. At least one of the fixing members sequentially passes through the first fixing hole, the first positioning hole, and the second fixing hole to fix the first gasket. At least one of the fixing members sequentially passes through the first fixing hole, the second positioning hole, and the second fixing hole to fix the second gasket. At least one of the fixing members sequentially passes through the first fixing hole, the third positioning hole, and the second fixing hole to fix the third gasket.

[0018] In a third aspect, the present application provides a coater, which includes a storage device and the coating device, and the storage device is used for storing battery slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a schematic structural diagram of a coating device provided by an embodiment of the present application;

[0021] Figure 2 is a schematic combined structure diagram of a gasket assembly provided by an embodiment of the present application Figure 1 ;

[0022] Figure 3 is a schematic exploded structure diagram of a gasket assembly provided by an embodiment of the present application;

[0023] Figure 4 is a schematic structural diagram of a first gasket provided by an embodiment of the present application;

[0024] Figure 5 is a schematic combination structure of a gasket assembly provided by an embodiment of the present application Figure 2 ;

[0025] Figure 6 is an enlarged schematic structural view of a first guiding flow channel in a gasket assembly provided by an embodiment of the present application;

[0026] Figure 7 is a schematic cross-sectional structure view of a coating device provided by an embodiment of the present application;

[0027] Figure 8 is a schematic structural view of a coating machine provided by an embodiment of the present application.

[0028] Reference numeral description:

[0029] Coating machine - 10000, coating device - 1000, gasket assembly - 100, first die head - 200, second die head - 300, first accommodating cavity - 310, first gasket - 10, first side - 101, second side - 102, third side - 103, fourth side - 104, first positioning hole - 11, second gasket - 20, first opening side - 201, second positioning hole - 21, first opening - 22, first guiding flow channel - 23, first chamfered portion - 24, third gasket - 30, second opening side - 301, third positioning hole - 31, second opening - 32, second guiding flow channel - 33, second chamfered portion - 34, receiving device - 2000, storage device - 3000. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0032] In this specification, for convenience, terms indicating orientation or positional relationship such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are used to describe the positional relationship of the components with reference to the accompanying drawings. This is only for the convenience of describing this specification and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present disclosure. The positional relationship of the components is appropriately changed according to the direction of the described components. Therefore, it is not limited to the terms described in the specification and can be appropriately replaced according to the circumstances.

[0033] In this specification, unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate member, or the communication inside two components. For those of ordinary skill in the art, the meanings of the above terms in the present disclosure can be understood according to the circumstances.

[0034] The battery coating gasket is a component used in the manufacturing process of lithium-ion batteries. The extrusion coating gasket needs to be fixedly designed according to the size specifications of the battery cell design, and each gasket can only correspond to one size; when the size of the battery cell needs to be changed, a new gasket needs to be designed to meet the requirements of the electrode sheet size in the battery cell. In other words, in the related art, when the size of the coated battery cell changes and the old gasket cannot meet the coating requirements, it is scrapped, and a new gasket with a new size needs to be designed. Designing a new gasket with a new size requires a long cycle, which not only causes waste of resources but also is not conducive to improving the efficiency of battery coating or realizing the rapid switching of gasket models.

[0035] Please refer to Figures 1 to 4 , Figure 1 which is a schematic structural diagram of a coating device provided by an embodiment of the present application, Figure 2 is a combined structural schematic diagram of a gasket assembly provided by an embodiment of the present application Figure 1 , Figure 3 is a disassembled structural schematic diagram of a gasket assembly provided by an embodiment of the present application, Figure 4 is a schematic structural diagram of a first gasket provided by an embodiment of the present application.

[0036] The present application provides a gasket assembly 100, a coating device 1000, and a coating machine 10000 to solve the technical problem in the related art that when the size of the coated battery cell changes, a new gasket needs to be designed, which is not conducive to improving the efficiency of battery coating.

[0037] The gasket assembly 100 provided by the present application is applied to the coating device 1000, and the gasket assembly 100 is located in the extrusion gap formed by the first die head 200 and the second die head 300. Among them, the first die head 200 is the upper die head, and the second die head 300 is the lower die head. For the convenience of description, the gasket assembly 100 is defined with reference to the first perspective. The length direction of the gasket assembly 100 is defined as the X direction, and the width direction of the gasket assembly 100 is defined as the Y direction.

[0038] The gasket assembly 100 includes a first gasket 10, a second gasket 20, and a third gasket 30. The first gasket 10 includes a first side 101, a second side 102, a third side 103, and a fourth side 104 that are connected in sequence. The first gasket 10 further includes a plurality of first positioning holes 11, and the plurality of first positioning holes 11 are arranged in sequence along the direction of the third side 103. The second gasket 20 is disposed on one side of the first gasket 10 and is connected to the second side 102. The second gasket 20 includes a plurality of second positioning holes 21, and the plurality of second positioning holes 21 are arranged along the extending direction of the plurality of first positioning holes 11. The third gasket 30 is disposed on the other side of the first gasket 10 and is connected to the fourth side 104. The third gasket 30 includes a plurality of third positioning holes 31, and the plurality of third positioning holes 31 are arranged along the extending direction of the plurality of first positioning holes 11. Among them, the first side 101 of the first gasket 10, the side of the second gasket 20 close to the first gasket 10, and the side of the third gasket 30 close to the second gasket 20 form a coating opening.

[0039] The first side 101, the second side 102, the third side 103, and the fourth side 104 of the first gasket 10 provided by the present application are connected in sequence. In other words, the first side 101 and the third side 103 are relatively spaced apart, and the second side 102 and the fourth side 104 are relatively spaced apart. Specifically, the first side 101 and the third side 103 of the first gasket 10 connected in sequence are arranged along the X direction and are relatively spaced apart along the Y direction, and the second side 102 and the fourth side 104 are arranged along the Y direction and are relatively spaced apart along the X direction.

[0040] The first side 101, the second side 102, the third side 103, and the fourth side 104 of the first gasket 10 enclose a quadrilateral. And in this embodiment, the shape of the first gasket 10 is a rectangle. In other embodiments, the shape of the first gasket 10 can also be a square or other quadrilaterals, and the present application does not limit this.

[0041] The first gasket 10 further includes a plurality of first positioning holes 11, which are used for positioning with the first die head 200 and the second die head 300 of the coating device 1000. Optionally, the application does not limit how the first gasket 10 is fixed to the first die head 200 and the second die head 300 through the first positioning holes 11, which will be described in detail later. The plurality of first positioning holes 11 are arranged in sequence along the direction of the third side 103, and the plurality of first positioning holes 11 are relatively close to the third side 103 to be away from the coating opening, so as to avoid interference and affect the coating of the battery paste in the coating opening.

[0042] The second gasket 20 is arranged on one side of the first gasket 10 and connected to the second side 102, and the third gasket 30 is arranged on the other side of the first gasket 10 and connected to the fourth side 104. In other words, the second gasket 20 and the third gasket 30 are respectively arranged on both sides of the first gasket 10.

[0043] Further, similarly, the second gasket 20 further includes a plurality of second positioning holes 21, which are used for positioning with the first die head 200 and the second die head 300 of the coating device 1000. Optionally, the application does not limit how the second gasket 20 is fixed to the first die head 200 and the second die head 300 through the second positioning holes 21, which will be described in detail later. The plurality of second positioning holes 21 are arranged along the extending direction of the plurality of first positioning holes 11. In other words, the plurality of second positioning holes 21 and the plurality of first positioning holes 11 extend in a straight line direction. And, the third gasket 30 further includes a plurality of third positioning holes 31, which are used for positioning with the first die head 200 and the second die head 300 of the coating device 1000. Optionally, the application does not limit how the third gasket 30 is fixed to the first die head 200 and the second die head 300 through the third positioning holes 31, which will be described in detail later. The plurality of third positioning holes 31 are arranged along the extending direction of the plurality of first positioning holes 11. In other words, the plurality of third positioning holes 31, the plurality of first positioning holes 11 and the plurality of second positioning holes 21 extend in a straight line direction.

[0044] The first side 101 of the first gasket 10, the side of the second gasket 20 close to the first gasket 10, and the side of the third gasket 30 close to the second gasket 20 form a coating opening. That is, the width of the first side 101 in the first gasket 10 is the width of the coating opening. In other words, the width (dimension along the X direction) of the first side 101 in the first gasket 10 determines the coating width of the battery paste. It should be noted that the first gasket 10 can have multiple size specifications. Similarly, the second gasket 20 and the third gasket 30 can have multiple size specifications. During the coating process of the battery paste, when the battery model to be coated changes, different size specifications of the first gasket 10, the second gasket 20, and the third gasket 30 can be switched to make the gasket assembly 100 form coating openings with different widths, so that the gasket assembly 100 can adapt to battery electrodes with different widths, without the need to redesign the gasket to meet the requirements of the electrode size in the battery, which is beneficial to improving the efficiency of battery coating. Further, although the first gasket 10 has multiple size specifications, the dimension of the gasket assembly 100 along the X direction is the same. In other words, when the size specification of the first gasket 10 changes, the size specifications of the second gasket 20 and the third gasket 30 can change synchronously, so that the dimension of the gasket assembly 100 along the X direction is the same, enabling the gasket assembly 100 to adjust the width of the coating opening while adapting to the first die head 200 and the second die head 300. For example, when the width of the battery to be coated decreases, a smaller size specification of the first gasket 10 can be selected to reduce the width of the coating opening of the gasket assembly 100 to adapt to the coating width of the battery, and larger size specifications of the second gasket 20 and the third gasket 30 can be selected to enable the dimension of the gasket assembly 100 along the X direction to be adapted to the extrusion gap formed by the first die head 200 and the second die head 300.

[0045] In the gasket assembly 100 provided by the present application, the first gasket 10 includes a first side 101, a second side 102, a third side 103, and a fourth side 104 that are connected in sequence. The first gasket 10 further includes a plurality of first positioning holes 11, and the plurality of first positioning holes 11 are arranged in sequence along the direction of the third side 103. The second gasket 20 is disposed on one side of the first gasket 10 and connected to the second side 102. The second gasket 20 includes a plurality of second positioning holes 21, and the plurality of second positioning holes 21 are arranged along the extending direction of the plurality of first positioning holes 11. The third gasket 30 is disposed on the other side of the first gasket 10 and connected to the fourth side 104. The third gasket 30 includes a plurality of third positioning holes 31, and the plurality of third positioning holes 31 are arranged along the extending direction of the plurality of first positioning holes 11. Among them, the first side 101 of the first gasket 10, the side of the second gasket 20 close to the first gasket 10, and the side of the third gasket 30 close to the second gasket 20 form a coating opening. The gasket assembly 100 is composed of the first gasket 10, the second gasket 20, and the third gasket 30. During the coating process of the battery paste, if the battery model to be coated changes, different sizes and specifications of the first gasket 10, the second gasket 20, and the third gasket 30 can be switched to make the gasket assembly 100 form coating openings with different widths, so that the gasket assembly 100 can adapt to battery electrodes with different widths, without the need to redesign the gasket to meet the requirements of the electrode size in the battery, which is beneficial to improving the efficiency of battery coating.

[0046] It should be noted that in this embodiment, the size range of the gasket assembly 100 in the X direction is 100 mm - 1000 mm. Optionally, the size of the gasket assembly 100 in the X direction can be 100 mm, or 150 mm, or 200 mm, or 210 mm, or 300 mm, or 320 mm, or 400 mm, or 450 mm, or 500 mm, or 600 mm, or 700 mm, or 800 mm, or 900 mm, or 1000 mm, or other values within 100 mm - 1000 mm.

[0047] Please refer to Figure 5 , Figure 5 which is a schematic combination structure of a gasket assembly provided by an embodiment of the present application Figure 2。In one embodiment, the dimension of the second gasket 20 along a preset direction is greater than the dimension of the first gasket 10 along the preset direction. And in the side of the second gasket 20 close to the first gasket 10, the part exceeding the first gasket 10 forms a first opening edge 201. Wherein, the preset direction is the extending direction of the second side 102 and the fourth side 104 of the first gasket 10. In other words, the preset direction is the above-mentioned Y direction.

[0048] Moreover, the dimension of the third gasket 30 along the preset direction is greater than the dimension of the first gasket 10 along the preset direction. And in the side of the third gasket 30 close to the first gasket 10, the part exceeding the first gasket 10 forms a second opening edge 301. The first opening edge 201 and the second opening edge 301 are oppositely arranged to form the coating opening. The battery paste flows out from the coating opening and is coated onto the electrode sheet of the battery through the coating opening. The coating opening determines and limits the coating width of the battery paste.

[0049] Please refer to again Figure 5 , in one embodiment, a first opening 22 is provided on the first opening edge 201. The first opening 22 is used for passing the battery paste. A second opening 32 is provided on the second opening edge 301. The second opening 32 is used for passing the battery paste.

[0050] The first opening 22 and the second opening 32 can be used to buffer the battery paste, avoid uneven flow rates of different parts of the battery paste, so as to improve the uniformity of coating the battery paste by using the gasket assembly 100, and further improve the production yield of the battery. It should be noted that, in this embodiment, one first opening 22 is provided on the first opening edge 201. In other embodiments, multiple first openings 22 can also be provided on the first opening edge 201, such as two, or three, or four, or more than four. The present application does not limit this. Similarly, in this embodiment, one second opening 32 is provided on the second opening edge 301. In other embodiments, multiple second openings 32 can also be provided on the second opening edge 301, such as two, or three, or four, or more than four. The present application does not limit this.

[0051] Please refer to Figure 1 and Figure 6 , Figure 6It is an enlarged structural schematic diagram of the first guiding flow channel in a gasket assembly provided by an embodiment of the present application. In one embodiment, a first guiding flow channel 23 is provided on the second gasket 20. The first guiding flow channel 23 is disposed close to the coating opening, and the first guiding flow channel 23 is used for coating ceramic slurry. A second guiding flow channel 33 is provided on the third gasket 30. The second guiding flow channel 33 is disposed close to the coating opening, and the second guiding flow channel 33 is used for coating ceramic slurry.

[0052] It should be noted that the first guiding flow channel 23 and the second guiding flow channel 33 are respectively close to both ends of the coating opening. In other words, the ceramic slurry flowing out from the first guiding flow channel 23 and the second guiding flow channel 33 is coated on the edge of the battery electrode sheet. Coating the ceramic slurry on the edge of the battery electrode sheet can reduce burrs during laser slitting or die cutting, which is beneficial to reducing the risk of internal short circuit of the battery, and the ceramic edge can play an insulating role to prevent internal short circuit of the battery.

[0053] It should be noted that the first guiding flow channel 23 is disposed on the side of the second gasket 20 facing the first die head 200, and the first guiding flow channel 23 does not penetrate through the second gasket 20. Similarly, the second guiding flow channel 33 is disposed on the side of the third gasket 30 facing the second die head 300, and the second guiding flow channel 33 does not penetrate through the third gasket 30.

[0054] Please refer to again Figure 6 , in one embodiment, a first chamfering portion 24 is provided on the side of the second gasket 20 facing the first gasket 10. The first chamfering portion 24 is disposed adjacent to the first guiding flow channel 23. By disposing the first chamfering portion 24 at a position adjacent to the first guiding flow channel 23, the fluid pressure at the lip edge of the first die head 200 can be stabilized during the coating of the ceramic slurry, the velocity distribution of the ceramic slurry extruded from the slit is uniform, the thickness consistency of the coated film surface edge is high, and the problem of edge swelling during the preparation of the battery can be prevented.

[0055] A second chamfering portion 34 is provided on the side of the third gasket 30 facing the first gasket 10. The second chamfering portion 34 is disposed adjacent to the second guiding flow channel 33. Similarly, by disposing the second chamfering portion 34 at a position adjacent to the second guiding flow channel 33, the fluid pressure at the lip edge of the first die head 200 can be stabilized during the coating of the ceramic slurry, the velocity distribution of the ceramic slurry extruded from the slit is uniform, the thickness consistency of the coated film surface edge is high, and the problem of edge swelling during the preparation of the battery can be prevented.

[0056] Please refer to Figure 1 and Figure 2, this application also provides a coating device 1000. In the coating device 1000, it includes a first die head 200, a second die head 300 and the gasket assembly 100. The first die head 200 and the second die head 300 are arranged opposite to each other with a spacing to form an extrusion gap, and the gasket assembly 100 is arranged in the extrusion gap.

[0057] One end of the extrusion gap has a discharge port. According to the above, the first side 101 of the first gasket 10, the second gasket 20, and the third gasket 30 form the coating opening, and the coating opening communicates with the discharge port so that the battery paste flows out from the discharge port for coating.

[0058] In the coating device 1000 provided by this application, the first gasket 10 of the gasket assembly 100 includes a first side 101, a second side 102, a third side 103 and a fourth side 104 connected in sequence. The first gasket 10 further includes a plurality of first positioning holes 11, and the plurality of first positioning holes 11 are arranged in sequence along the direction of the third side 103. The second gasket 20 is arranged on one side of the first gasket 10 and is connected to the second side 102. The second gasket 20 includes a plurality of second positioning holes 21, and the plurality of second positioning holes 21 are arranged along the extending direction of the plurality of first positioning holes 11. The third gasket 30 is arranged on the other side of the first gasket 10 and is connected to the fourth side 104. The third gasket 30 includes a plurality of third positioning holes 31, and the plurality of third positioning holes 31 are arranged along the extending direction of the plurality of first positioning holes 11. Among them, the first side 101 of the first gasket 10, the side of the second gasket 20 close to the first gasket 10, and the side of the third gasket 30 close to the second gasket 20 form the coating opening. The gasket assembly 100 is composed of the first gasket 10, the second gasket 20 and the third gasket 30. During the coating process of the battery paste, if the battery model to be coated changes, different sizes and specifications of the first gasket 10, the second gasket 20 and the third gasket 30 can be switched so that the gasket assembly 100 forms coating openings with different widths, thereby enabling the coating device 1000 to be adapted to coat battery electrode sheets with different widths, without the need to redesign the gasket to meet the requirements of the electrode sheet size in the battery, which is beneficial to improving the efficiency of battery coating.

[0059] Please refer to Figure 7 , Figure 7It is a schematic cross-sectional structure diagram of a coating device provided by an embodiment of the present application. In one embodiment, the second die head 300 includes a first accommodating cavity 310 for accommodating battery slurry, and the first accommodating cavity 310 communicates with the coating opening. Specifically, the battery slurry in the first accommodating cavity 310 is used to be located in the extrusion gap between the first die head 200 and the second die head 300 after passing through the coating opening, and is extruded from the discharge port at one end of the extrusion gap for coating.

[0060] In one embodiment, the first die head 200 includes a second accommodating cavity (not shown) for accommodating ceramic slurry, and the second accommodating cavity communicates with the first guiding flow channel 23 of the second gasket 20 and the second guiding flow channel 33 of the third gasket 30. Specifically, the ceramic slurry in the second accommodating cavity is used to be located in the extrusion gap between the first die head 200 and the second die head 300 after passing through the first guiding flow channel 23 and the second guiding flow channel 33, and is extruded from the discharge port at one end of the extrusion gap for coating.

[0061] In one embodiment, the coating device 1000 further includes a plurality of fixing members. The first die head 200 is provided with a plurality of first fixing holes, and the second die head 300 is provided with a plurality of second fixing holes. The first fixing holes and the second fixing holes correspond one by one. At least one of the fixing members sequentially passes through the first fixing hole, the first positioning hole 11, and the second fixing hole to fix the first gasket 10. At least one of the fixing members sequentially passes through the first fixing hole, the second positioning hole 21, and the second fixing hole to fix the second gasket 20. At least one of the fixing members sequentially passes through the first fixing hole, the third positioning hole 31, and the second fixing hole to fix the third gasket 30. It should be noted that in this embodiment, the fixing members include but are not limited to screws, and the first fixing holes and the second fixing holes include but are not limited to threaded holes. The fixing members relatively fix the first die head 200 and the second die head 300 through threaded connection, and fix the gasket assembly 100 between the first die head 200 and the second die head 300. In other embodiments, the first die head 200, the second die head 300, and the fixing members can also be fixed by fixing structures such as bolts, and the present application does not limit this.

[0062] Please refer to Figure 8 , Figure 8 It is a schematic structure diagram of a coating machine provided by an embodiment of the present application. The present application also provides a coating machine 10000, and the coating machine 10000 includes a storage device 3000 and the coating device 1000, and the storage device 3000 is used to store battery slurry.

[0063] Further, the storage device 3000 communicates with the first accommodation cavity 310 of the second die head 300 and is configured to transfer the battery slurry into the first accommodation cavity 310 for coating.

[0064] The coater 10000 further includes a containment device 2000 for storing ceramic slurry. Further, the containment device 2000 communicates with the second accommodation cavity of the first die head 200 and is configured to transfer the ceramic slurry into the second accommodation cavity for coating.

[0065] In the coater 10000 provided in this application, the first gasket 10 of the gasket assembly 100 includes a first side 101, a second side 102, a third side 103, and a fourth side 104 that are connected in sequence. The first gasket 10 further includes a plurality of first positioning holes 11, and the plurality of first positioning holes 11 are arranged in sequence along the direction of the third side 103. The second gasket 20 is disposed on one side of the first gasket 10 and is connected to the second side 102. The second gasket 20 includes a plurality of second positioning holes 21, and the plurality of second positioning holes 21 are arranged along the extending direction of the plurality of first positioning holes 11. The third gasket 30 is disposed on the other side of the first gasket 10 and is connected to the fourth side 104. The third gasket 30 includes a plurality of third positioning holes 31, and the plurality of third positioning holes 31 are arranged along the extending direction of the plurality of first positioning holes 11. Among them, the first side 101 of the first gasket 10, the side of the second gasket 20 close to the first gasket 10, and the side of the third gasket 30 close to the second gasket 20 form a coating opening. The gasket assembly 100 is composed of the first gasket 10, the second gasket 20, and the third gasket 30. During the coating process of the battery slurry, if the battery model to be coated changes, different sizes and specifications of the first gasket 10, the second gasket 20, and the third gasket 30 can be switched to enable the gasket assembly 100 to form coating openings with different widths. Furthermore, the coater 10000 can be adapted to coat battery electrode sheets with different widths without the need to redesign the gasket to meet the requirements of the electrode sheet size in the battery, which is beneficial to improving the efficiency of battery coating.

[0066] References to "embodiments" or "implementation manners" in this application mean that specific features, structures, or characteristics described in connection with an embodiment can be included in at least one embodiment of this application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art understand explicitly and implicitly that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures, or characteristics described in each embodiment of this application can be combined arbitrarily without contradiction to form another embodiment that does not depart from the spirit and scope of the technical solution of this application.

[0067] The above are some implementation manners of this application. It should be noted that for those of ordinary skill in the art, without departing from the principle of this application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of this application.

Claims

1. A gasket assembly, characterized in that: include: A first gasket, comprising a first side, a second side, a third side and a fourth side connected in sequence, the first gasket further comprising a plurality of first positioning holes, the plurality of first positioning holes being arranged in sequence along the direction of the third side; a second gasket, disposed on one side of the first gasket and connected to the second side, the second gasket comprising a plurality of second positioning holes, the plurality of second positioning holes being arranged along an extending direction of the plurality of first positioning holes; and A third gasket is arranged on the other side of the first gasket and connected to the fourth side, and the third gasket includes a plurality of third positioning holes, and the plurality of third positioning holes are arranged along the extension direction of the plurality of first positioning holes, wherein a coating opening is formed on the first side of the first gasket, on the side of the second gasket close to the first gasket, and on the side of the third gasket close to the second gasket.

2. The gasket assembly according to claim 1, characterized in that The size of the second gasket along a preset direction is greater than the size of the first gasket along the preset direction, and a portion of the second gasket on a side close to the first gasket that exceeds the first gasket forms a first opening edge, wherein the preset direction is an extension direction of the second edge and the fourth edge of the first gasket; The dimension of the third gasket along the preset direction is greater than that of the first gasket along the preset direction, and the portion of the third gasket on the side close to the first gasket that exceeds the first gasket forms a second opening edge, and the first opening edge and the second opening edge are relatively arranged to form the coating opening.

3. The gasket assembly according to claim 1, characterized in that The second gasket is provided with a first guide channel, the first guide channel is arranged close to the coating opening, and the first guide channel is used to coat the ceramic slurry; the third gasket is provided with a second guide channel, the second guide channel is arranged close to the coating opening, and the second guide channel is used to coat the ceramic slurry.

4. The gasket assembly according to claim 3, characterized in that The second gasket is provided with a first chamfered portion on a side facing the first gasket, and the first chamfered portion is arranged adjacent to the first guide channel; the third gasket is provided with a second chamfered portion on a side facing the first gasket, and the second chamfered portion is arranged adjacent to the second guide channel.

5. The gasket assembly according to claim 2, characterized in that: A first opening is provided on the side of the first opening, and the first opening is used for passing battery slurry; a second opening is provided on the side of the second opening, and the second opening is used for passing battery slurry.

6. A coating device, characterized in that: The coating device comprises a first die head, a second die head and the gasket assembly according to any one of claims 1 to 5, wherein the first die head and the second die head are arranged with relative spacing to form an extrusion gap, and the gasket assembly is arranged in the extrusion gap.

7. The coating device according to claim 6, characterized in that: The second die head includes a first accommodating cavity, the first accommodating cavity is used to accommodate battery slurry, and the first accommodating cavity is connected to the coating opening.

8. The coating device according to claim 6, characterized in that: The first die head includes a second accommodating cavity, the second accommodating cavity is used to accommodate ceramic slurry, and the second accommodating cavity is connected to the first guide flow channel of the second gasket and the second guide flow channel of the third gasket.

9. The coating device according to claim 6, characterized in that: The coating device also includes a plurality of fixing parts, the first die head is provided with a plurality of first fixing holes, the second die head is provided with a plurality of second fixing holes, the first fixing holes and the second fixing holes correspond to each other one by one, at least one of the fixing parts sequentially passes through the first fixing hole, the first positioning hole, and the second fixing hole to fix the first gasket, at least one of the fixing parts sequentially passes through the first fixing hole, the second positioning hole, and the second fixing hole to fix the second gasket, and at least one of the fixing parts sequentially passes through the first fixing hole, the third positioning hole, and the second fixing hole to fix the third gasket.

10. A coating machine, characterized in that: It comprises a storage device and a coating device as described in any one of claims 6 to 9, wherein the storage device is used to store battery slurry.

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