CN221017045U

CN221017045U - Coating die head, coating equipment and battery production system

Info

Publication number: CN221017045U
Application number: CN202420492553.2U
Authority: CN
Inventors: 朱建明; 陈明亮; 陈金亮
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-03-14
Filing date: 2024-03-14
Publication date: 2024-05-28
Anticipated expiration: 2034-03-14

Abstract

The application discloses a coating die head, coating equipment and a battery production system, wherein the coating die head comprises a first die head, a second die head and a gasket, and the second die head is connected with the first die head; the gasket is arranged between the first die head and the second die head, the gasket, the first die head and the second die head are matched to form a coating gap, and the outlet of the coating gap faces to the first side of the coating die head; the first die head comprises a die head body and a lip insert, wherein the wear resistance of the lip insert is higher than that of the die head body, the die head body is provided with a first side surface matched with the gasket, the edge of the first side surface of the die head body is provided with a notch groove, the wall surface of the die head body surrounding the notch groove is provided with a groove, the lip insert is arranged in the notch groove and is in sealing connection with the wall surface, the lip insert is provided with a protruding part, and the protruding part is arranged in the groove and is in sealing connection with the groove wall of the groove; the risk of slurry leakage is reduced and the reliability of the coating die head is improved.

Description

Coating die head, coating equipment and battery production system

Technical Field

The application relates to the technical field of relevant equipment for battery production, in particular to a coating die head, coating equipment and a battery production system.

Background

This section provides merely background information related to the application, which is not necessarily prior art.

Coating is one of the processes in the production process of a battery, for example, coating a positive electrode active material onto a positive electrode substrate, coating a negative electrode active material onto a negative electrode substrate, and the like. The coating die is a member for applying a slurry to a pole piece substrate or the like in a coating process, and the reliability of the coating die has a large influence on the coating quality of the coating process, which directly affects the performance of the battery. How to improve the reliability of a coating die is always a problem to be solved.

Disclosure of utility model

In view of the above, the present application provides a coating die, a coating apparatus, and a battery production system, which improve the reliability of the coating die by improving the abrasion resistance and sealability of the coating die.

A first aspect of the present application provides a coating die comprising a first die, a second die, and a gasket, the second die being connected to the first die; the gasket is arranged between the first die head and the second die head, and is matched between the first die head and the second die head to form a coating gap, the coating die head is provided with a first side, and the first side is the side facing to the outlet of the coating gap; the first die head comprises a die head body and a lip insert, the wear resistance of the lip insert is higher than that of the die head body, the die head body is provided with a first side surface matched with a gasket, the edge of the first side of the die head body is provided with a notch groove, the wall surface of the die head body, which encloses the notch groove, is provided with a groove, the lip insert is arranged in the notch groove and is in sealing connection with the wall surface, the groove is arranged in a concave manner relative to the wall surface, the lip insert is provided with a protruding portion, and the protruding portion is arranged in the groove and is in sealing connection with the groove wall of the groove.

According to the coating die head of the embodiment of the application, the edge of the first side of the die head body is the edge of the die head body corresponding to the outlet side of the coating gap, and the position corresponding to the outlet of the coating gap is the position where the coating die head is more easily worn. According to the coating die head disclosed by the embodiment of the application, the notch groove is formed in the edge of the first side surface of the die head body, and the lip insert is arranged in the notch groove, so that the wear resistance of the coating die head at the position easy to be worn is improved, and the service life of the coating die head is prolonged because the wear resistance of the lip insert is higher than that of the die head body; the wall surface of the notch groove is in sealing fit with the lip insert, and meanwhile, the groove is further combined with the protruding part in sealing fit, so that the slurry leakage path is prolonged, the slurry leakage path tortuosity is improved, the slurry leakage difficulty is improved, the sealing performance of the connection position of the die head body and the lip insert is improved, the leakage risk of the slurry flowing through the coating gap from the connection position of the die head body and the lip insert is reduced, and the reliability of the coating die head is improved.

In addition, the coating die according to the application may also have the following additional technical features:

In some embodiments of the present application, the notch groove and the groove penetrate through two ends of the first die head along the first direction, the end surfaces of two ends of the lip insert along the first direction are respectively flush with the end surfaces of two ends of the first die head along the first direction, the arrangement direction of the first die head, the gasket and the second die head is a second direction, the direction in which the outlet of the coating gap faces is a third direction, and the first direction, the second direction and the third direction are intersected. The lip inserts link up the die head body along the both ends of first direction for first die head is the lip inserts towards the pole piece one side of waiting for the coating piece, and like this, the position that first die head is easily worn out can all be protected through the higher lip inserts of wear resistance, has improved the wear resistance of coating die head. And the lip inserts can be arranged as a whole, so that the flatness between the lip flow path surface and the first side surface of the die head body is improved, and the coating quality is improved.

In some embodiments of the application, the face of the lip insert that mates with the gasket is an insert channel face that is disposed flush with the first side face. The insert flow surface is flush with the first side surface, and in the process that slurry flows from the first side surface to the insert flow surface, the slurry flows smoothly, so that the coating quality is improved.

In some embodiments of the present application, the wall surface includes a first wall surface and a second wall surface, the first wall surface is spaced from the first side surface, the second wall surface intersects the first wall surface, one end of the second wall surface is connected to the first wall surface, the other end of the second wall surface is connected to the first side surface, and the groove is provided on the second wall surface. After the coating die head is assembled, the second wall surface is a wall surface extending along the vertical direction, the first wall surface is a wall surface extending along the horizontal direction, the groove is formed in the second wall surface, when the protruding portion of the lip insert is inserted into the groove, the groove wall of the groove can support the protruding portion from the lower portion, so that the lip insert can be temporarily hung on the die head body when other fixing is not performed, the subsequent fixing assembly of the lip insert and the die head body is facilitated, and after the fixing assembly is completed, the groove wall of the groove has a supporting effect on the protruding portion, so that the connection stability of the lip insert and the die head body is higher.

In some embodiments of the application, the first wall surface is disposed parallel to the first side surface, and the second wall surface is disposed perpendicular to the first wall surface. The notch groove is formed into the right-angle groove body with the L-shaped cross section, so that the attaching area of the lip insert and the die head body can be increased, the tightness between the lip insert and the die head body is improved, and the resistance of slurry permeation can be improved due to the right-angle transition between the first wall surface and the second wall surface, and the possibility of permeation can be further reduced.

In some embodiments of the present application, the groove is disposed at an end of the second wall surface, which is close to the first wall surface, so as to facilitate improvement of flatness of the second wall surface, thereby improving adhesion between the lip insert and the second wall surface, and further improving tightness between the lip insert and the die body.

In some embodiments of the application, the lip insert is in abutting sealing connection with the first wall and the second wall, respectively. The surface of the lip insert and the wall surface of the die head body are provided with larger sealing areas, so that the sealing performance between the lip insert and the die head body can be improved, and the possibility of slurry leakage is reduced.

In some embodiments of the application, the protrusion is in a snug, sealed connection with the circumferential side wall of the recess and the protrusion is in a sealed connection with the bottom wall of the recess. The surface of the protruding part and the wall surface of the die head body are provided with larger sealing areas, so that the sealing performance between the lip insert and the die head body can be improved, and the possibility of slurry leakage is reduced.

In some embodiments of the application, a sealant is filled between the lip insert and the wall surface and/or between the projection and the wall of the groove. By arranging the sealant, the tightness between the lip insert and the die head body can be improved, and the risk of leakage of slurry from the connecting position between the lip insert and the die head body is reduced.

In some embodiments of the application, the lip insert is a zirconia ceramic insert and/or the die body is a metal piece. The lip insert made of zirconia ceramic has high hardness, high wear resistance and corrosion resistance, can not react with slurry chemically, and can greatly prolong the service life of the lip of the die head.

In some embodiments of the present application, the lip insert protrudes toward the first side, the first outlet and the protrusion are respectively disposed on opposite sides of the lip insert, the first outlet, the gasket and the second die form an outlet of the coating gap in cooperation, the first outlet is disposed flush with the first side toward the side of the gasket, the thickness of the first outlet is tapered along a direction away from the protrusion, and the thickness of the first outlet is a dimension of the first outlet along an arrangement direction of the first die, the gasket and the second die. The thickness of the first outlet part is gradually reduced, so that the thickness of the lip insert at the outlet of the coating gap is smaller, the coating area of the coating die head is controlled, and the stability of the surface density of the coating die head coated on the piece to be coated is improved.

In some embodiments of the application, the edge of the first outlet portion facing the first side has a thickness of 0.5 mm to 1 mm. The thickness of the edge of the first outlet part is limited, so that the coating area of the coating die head is further controlled, and the stability of the surface density of the coating die head coated on the piece to be coated is improved.

In some embodiments of the present application, the first die is provided with an adjusting groove for installing an adjusting member, the depth of the adjusting groove is set along the arrangement direction of the first die, the gasket and the second die, the adjusting groove is communicated with the coating gap, and the adjusting groove and the notch groove are arranged at intervals along a third direction, and the third direction is consistent with the direction in which the outlet of the coating gap faces. The embodiment can reduce the possibility that the slurry flows from the adjusting groove to the notch groove or flows from the notch groove to the adjusting groove, and further can reduce the possibility of slurry leakage.

In some embodiments of the application, a minimum distance between the adjustment slot and the notch slot in the third direction is greater than or equal to 5 millimeters. The dimension of the minimum distance w between the adjusting groove and the notch groove is limited, so that the possibility of deformation of the part of the die head body between the adjusting groove and the notch groove can be reduced, and the possibility of unsmooth movement of the adjusting member can be reduced.

In some embodiments of the present application, a first mounting hole is formed on the lip insert, the first mounting hole penetrates through two opposite sides of the lip insert along a third direction, the third direction is consistent with a direction in which an outlet of the coating gap faces, a second mounting hole is formed on the second wall surface, and the second mounting hole is aligned with and corresponding to the first mounting hole; the coating die head further comprises a fastener, and the fastener penetrates through and is connected with the first mounting hole and the second mounting hole. The lip insert can be fastened on the die head body through the cooperation of the fastener, the first mounting hole and the second mounting hole, so that the connection stability of the lip insert and the die head body is improved; and the first mounting hole and the second mounting hole are equivalent to extending along the third direction, and the fastener can be assembled from the side part of the lip insert, so that the assembly is convenient, the flatness of the first flow surface is not influenced, and the flow uniformity of slurry is improved.

In some embodiments of the application, an end of the first mounting hole facing away from the die body is provided with a closure member. Through setting up the shutoff piece, can reduce the risk that the thick liquids overflows along the gap between fastener and the first mounting hole and the gap between fastener and the second mounting hole to can reduce the head shutoff of thick liquids with first mounting hole, lead to unable risk of dismantling the fastener.

The second aspect of the present application provides a coating apparatus comprising a coating die according to the present application or any of the embodiments of the present application.

A second aspect of the application proposes a battery production system comprising a coating device according to the application or according to any embodiment of the application.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 schematically illustrates a block diagram of a coating die according to some embodiments of the application;

Fig. 2 schematically shows an enlarged view of section a of fig. 1;

FIG. 3 schematically illustrates a split block diagram of a coating die according to some embodiments of the application;

FIG. 4 schematically illustrates a block diagram of a side view of a first die of some embodiments of the application;

Fig. 5 schematically illustrates a block diagram of a side view of a lip insert according to some embodiments of the present application;

Fig. 6 schematically illustrates a block diagram of a lip insert according to some embodiments of the present application;

FIG. 7 schematically illustrates a block diagram of a bottom view of a first die of some embodiments of the application;

Fig. 8 schematically illustrates a partial cross-sectional view of a lip insert coupled to a die body by fasteners in accordance with some embodiments of the application.

Reference numerals in the specific embodiments are as follows:

100. A first die; 101. a first side; 110. a die body; 111. a wall surface; 1111. a first wall surface; 1112. a second wall surface; 112. a groove; 1121. a circumferential side wall; 1122. a bottom wall; 113. An adjustment tank; 114. a second mounting hole; 115. a notch groove; 116. a mounting groove; 120. a lip insert; 121. an insert flowpath face; 122. a protruding portion; 123. a first outlet portion; 124. a first mounting hole; 125. a first surface; 126. a second surface; 130. a fastener; 140. a blocking member; 150. a fixing hole;

200. A second die; 201. a second flow surface; 210. a material cavity; 220. a second outlet portion;

300. a gasket; 310. a main body portion; 320. a stop portion; 330. a runner gap;

400. coating gaps;

x, a first direction; y, third direction; z, the second direction.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

The battery may include one or more battery cells including an electrode assembly and an electrolyte, the electrode assembly being composed of a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on part of the surface of the positive electrode current collector, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on part of the surface of the negative electrode current collector, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode lug. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like.

Coating is a process of applying a substance such as slurry, powder, or the like to the surface of an object such as fabric, paper, metal foil, or board to form a coating layer. In the production process of the battery cell, a coating process may be used to coat the positive electrode active material on the positive electrode current collector and to coat the negative electrode active material on the negative electrode current collector, i.e., the prepared pasty viscous slurry (positive electrode active material or negative electrode active material) is uniformly, continuously or intermittently coated on the substrate (positive electrode current collector or negative electrode current collector).

The coating equipment used in the coating process comprises a coating die head, a feeding pipeline, a slurry storage device and the like, wherein the coating die head comprises an upper die head, a lower die head and a gasket, a coating gap is formed between the upper die head and the lower die head through the gasket, the coating gap is also called a lip, a material cavity is arranged on the upper die head and/or the lower die head, and the material cavity is communicated with the coating gap. When the coating equipment is used for coating, the slurry in the slurry storage device enters the material cavity through the feeding pipeline, and then the slurry flows out of the cavity and is sprayed out of the outlet of the coating gap to be coated on the substrate.

In the coating process of the coating equipment, the structure of the coating gap (namely the lip) of the coating die head is easy to wear, the service life of the coating die head can be reduced, and after the surface of the structure is worn, the straightness of the opening of the coating gap is easy to be reduced, the coating quality is influenced, and then the quality of the battery monomer is influenced.

In order to solve the above problems, in some techniques, a coating die used in the coating process employs a metal body and a high hardness material such as DLC (Diamond-Like Carbon), which is a tool coating material commonly used in the industrial field, or tungsten carbide. The coating die head can prolong the service life of the coating die head, but the service life is short, the coating is not corrosion-resistant, part of the coating can react with slurry chemically, and the linearity of the lip of the die head is still poor.

In some further techniques, the structure at the coating gap (i.e., at the lip) of the coating die (i.e., the lip structure) is made of an insert that is more wear-resistant and corrosion-resistant than the main body structure, for example, in some specific techniques, the main body structure of the coating die is made of a metal material, and an insert ceramic insert is used as the lip structure on the main body structure (i.e., at the lip), so as to improve the above-mentioned problems. The wear resistance of the lip structure of the ceramic material is higher than that of the metal material, in the use process, the degree and the rate of the abrasion of the coating die head can be reduced, the wear resistance of the coating die head is improved, the service life of the coating die head is prolonged, the straightness of the opening of a coating gap can be well maintained by the coating die head due to the improvement of the wear resistance and the strong corrosion resistance, the coating quality is maintained, and the possibility of influencing the quality of a battery due to the coating quality is reduced.

Further research discovers that in the scheme that the coating die head is assembled through the main body structure and the lip structure and the like with the wear resistance higher than the main body structure, in the use process, the situation that slurry leakage easily occurs is difficult to achieve complete lamination at the assembling position of the main body structure and the lip structure, so that slurry waste and disordered coating environments can be caused, and the coating quality is greatly influenced, so that the performance of a battery can be influenced.

Aiming at the leakage condition of the slurry, the application provides a coating die head which comprises a first die head, a second die head and a gasket, wherein the second die head is connected with the first die head, the gasket is arranged between the first die head and the second die head, a coating gap is formed between the first die head and the second die head through the gasket, the first die head comprises a die head body and a lip insert, the wear resistance of the lip insert is higher than that of the die head body, the die head body is provided with a notch groove at the position corresponding to the lip, the wall surface of the die head body forming the notch groove is provided with a groove, the lip insert is provided with a bulge, the lip insert is embedded and sealed in the notch groove, and the bulge is sealed in the groove.

Through set up the breach groove on the die head body to install lip inserts in the breach groove, because the wear resistance of lip inserts is higher than the wear resistance of die head body, improved the wearing and tearing nature of coating die head by wearing and tearing position easily, improved the life of coating die head. The wall surface of the notch groove is in sealing fit with the lip insert, and meanwhile, the groove is further combined with the protruding part in sealing fit, so that the slurry leakage path is prolonged, the slurry leakage path tortuosity is improved, the slurry leakage difficulty is improved, the sealing performance of the connection position of the die head body and the lip insert is improved, the leakage risk of the slurry flowing through the coating gap from the connection position of the die head body and the lip insert is reduced, and the reliability of the coating die head is improved.

The coating die provided by the present application or the embodiments of the present application may be used, but not limited to, for coating a positive electrode active material to a positive electrode current collector, or for coating a negative electrode active material to a negative electrode current collector. The present embodiment mainly describes an example in which a coating die is used to coat a positive electrode current collector or a negative electrode current collector with a corresponding active material.

According to some embodiments of the present application, referring to fig. 1 to 5, fig. 1 schematically illustrates a structure diagram of a coating die of some embodiments of the present application, fig. 2 schematically illustrates an enlarged a portion of fig. 1, fig. 3 schematically illustrates a split structure diagram of a coating die of some embodiments of the present application, fig. 4 schematically illustrates a structure diagram of a side view of a first die of some embodiments of the present application, fig. 5 schematically illustrates a structure diagram of a side view of a lip insert of some embodiments of the present application, the present embodiment provides a coating die including a first die 100, a second die 200, and a gasket 300, the second die 200 is connected with the first die 100, the gasket 300 is disposed between the first die 100 and the second die 200, and the gasket 300 is mated between the first die 100 and the second die 200 to form a coating gap 400. The coating die has a first side, which is the side toward which the outlet of the coating slot 400 is directed. First die 100 includes die body 110 and lip inserts 120, and the wear resistance of lip inserts 120 is higher than the wear resistance of die body 110, and die body 110 has first side 101 with gasket 300 complex, and die body 110 is provided with notch groove 115 at the edge of first side 101, and is provided with recess 112 on the wall 111 of die body 110 surrounding notch groove 115, and lip inserts 120 set up in notch groove 115 to with wall 111 sealing connection, recess 112 is sunken setting for wall 111, and lip inserts 120 have bulge 122, and bulge 122 sets up in recess 112, and sealing connection with the cell wall of recess 112.

In the coating process, the coating die is assembled into the coating apparatus, and the first die 100 and the second die 200 may be sequentially arranged up and down, wherein the first die 100 may be an upper die and the second die 200 may be a lower die, that is, the first die 100 is arranged above the second die 200. The first side is understood to be the side of the coating die facing the pole piece waiting for the coating, i.e. the side from which the coating paste flows out through the coating die.

The die body 110 of the first die 100 is a main body portion of the first die 100, the first side 101 is a surface of the die body 110 mated with the gasket 300, the surface is a plane (a substantially plane is also a plane referred to in this embodiment), and the higher the flatness is, the better the first side 101 is enclosed on one side of the coating slit 400, that is, the first side 101 is a flow channel surface enclosed to form the coating slit 400. The face of lip insert 120 that mates with shim 300 is insert flow face 121, first side 101 and insert flow face 121 forming the flow face of first die 100, the flow face of first die 100 being defined as the first flow face for ease of description. The insert channel surface 121 and the first side surface 101 may be disposed at the same level, so as to improve the flatness of the first channel surface and facilitate the flow of the slurry.

The side surface of the second die 200 where the gasket 300 is mated is defined as a second flow surface 201, the second flow surface 201 is also a plane surface, the second flow surface 201 and the first flow surface are respectively sealed on both sides of the gasket 300, specifically, referring to fig. 1 and 3, the first flow surface is located on the top surface of the gasket 300, and the second flow surface 201 is located on the bottom surface of the gasket 300.

The gasket 300 is a structure for forming a coating slit 400 between the first die 100 and the second die 200, the coating slit 400 being used for flowing a paste, and the paste being extruded to the outside of the coating die, specifically, the first side of the coating die through the outlet of the coating slit 400 after flowing through the coating slit 400, to coat the corresponding paste to the substrate. As shown in fig. 3, and as can be seen in fig. 2, a flow gap 330 can be provided on shim 300, and flow gap 330 can be a notch on shim 300 with the open side of flow gap 330 facing the first side of the coating die. The first channel surface is in sealing contact with the gasket 300, the second channel surface 201 is in sealing contact with the gasket 300, and the first channel surface and the second channel surface 201 are disposed at a distance from each other through the channel gap 330 at the channel gap 330, so that a coating gap 400 is formed at the gap.

The gasket 300 includes a main body 310, the main body 310 has a sheet structure, the flow channel gap 330 may be disposed at a side of the main body 310 facing the first side, and as shown in fig. 2 and 3, the flow channel gap 330 may be disposed at intervals, and a plurality of flow channel gaps 330 may be separated from each other by a stopper 320 connected to the main body 310, and each flow channel gap 330 cooperates with the first and second flow channel surfaces 201 at corresponding positions to form a coating gap 400. The first flow surface is in sealing connection with the main body 310, the first flow surface is in sealing connection with the stopper 320, and the second flow surface 201 is in sealing connection with the main body 310, and the second flow surface 201 is in sealing connection with the stopper 320.

The coating die may be used to coat one kind of slurry, or may be used to coat two or more kinds of slurries. When two or more slurries are applied, the spacer 300 may be provided with corresponding isolation structures so that the slurries may flow, respectively. For example, in some embodiments, the coating die may simultaneously coat two kinds of slurries, where a flow channel groove may be disposed on the gasket 300, the flow channel groove and the flow channel gap 330 are spaced apart and not communicated with each other, the opening of the flow channel groove and the opening of the flow channel gap 330 face to the first side, the flow channel groove and the first flow channel surface and/or the second flow channel surface 201 at corresponding positions may also form a coating gap 400, and the slurry introduced into the flow channel groove is different from the slurry introduced into the flow channel gap 330, so that a substrate may be coated with different slurries.

The first die 100 or the second die 200 is provided with a material cavity 210, and an inlet of the material cavity 210 may be disposed at one side of the first die 100 or the second die 200 and connected with a slurry delivery device such as a pipe, etc., which delivers the slurry to the material cavity 210 and flows to the pole piece waiting coating member through an outlet of the coating slit 400. In the case of two slurries, separate chambers 210 may be provided to avoid mixing of the slurries, in some embodiments, different slurries 210 may be provided to the first die 100 and the second die 200, respectively, for example, a more-used main slurry chamber 210 and an inlet to the chamber 210 may be provided to the second die 200, and a less-used auxiliary slurry chamber 210 and an inlet to the chamber 210 may be provided to the first die 100.

Die body 110 of first die 100 is a main body portion of first die 100, first side 101 is a side of die body 110 facing gasket 300, and die body 110 is sealingly connected to main body portion 310, stopper portion 320, and the like of gasket 300. The notch groove 115 is formed on the die body 110, the notch groove 115 corresponds to a lip of the first die 100, and the notch groove 115 is matched with the lip insert 120, that is, the notch groove 115 may be a structure concavely formed on the die body 110, and it may allow the lip insert 120 to be installed therein. The notch groove 115 communicates with the side of the die body 110 facing the gasket 300 and may communicate with the first side of the die body 110, i.e., a notch is reserved at the lip of the die body 110 as the notch groove 115, which may improve the convenience of assembling the lip insert 120. The wall of the notch groove 115 is a part of the wall 111 of the die body 110, that is, a part of the wall 111 of the die body 110 surrounds the notch groove 115, in short, the wall 111 of the die body 110 surrounding the notch groove 115 is the wall of the notch groove 115.

The groove 112 is a groove body recessed further with respect to the groove wall of the notch groove 115, and the notch of the groove 112 communicates with the notch groove 115.

Lip insert 120 is a component at the lip of first die 100, the side of lip insert 120 facing gasket 300 is insert flow passage surface 121, which forms a first flow passage surface of first die 100 together with the side of die body 110 facing gasket 300, insert flow passage surface 121 is in sealing connection with stopper 320 of gasket 300, etc., and cooperates with gasket 300 to form a partial coating slit 400 and an outlet of coating slit 400.

The abrasion resistance refers to the resistance of a material to mechanical abrasion, and the abrasion resistance of the material can be lower under the same conditions as the higher the abrasion resistance of the material under the condition of a certain load and the abrasion resistance of the material per unit area per unit time. Lip insert 120 has a higher wear resistance than die body 110 such that lip insert 120 has a lower wear rate (i.e., material wear) than die body 110 under comparable operating conditions than die body 110.

Lip insert 120 may be a different material than the die so that lip insert 120 has a higher wear resistance than die body 110, e.g., lip insert 120 may be a wear resistant ceramic material and die body 110 may be a metallic material. The protrusion 122 is a portion of the lip insert 120, may be integrally formed with the lip insert 120, and may be made of the same material as the lip insert 120.

Lip insert 120 may be secured to die body 110 by fasteners 130, glue, or the like. Sealing between lip insert 120 and die body 110 may be achieved in a variety of ways, for example, by the engagement of the two surfaces, for example, by the provision of a seal, or by glue, etc. The seal between the projection 122 and the groove 112 can be achieved by the same means as described above.

The first die 100 and the second die 200 may be fastened by a fixing member, or may be implemented in other manners. In some embodiments, as shown in fig. 1 and 3, the first die 100, the gasket 300, and the second die 200 are respectively aligned with the fixing holes 150 extending in the second direction Z, and the fixing members such as screws sequentially pass through the fixing holes 150 of the first die 100, the gasket 300, and the second die 200 to lock and fix the three.

The second die 200 may be a unitary structure, and the lip and the main body may be made of the same material, for example, metal materials.

In this embodiment, the edge of the first side 101 of the die body 110, that is, the edge of the first die 100 corresponding to the outlet side of the coating slit 400, and the position corresponding to the outlet of the coating slit 400 is the position where the coating die is more easily worn. According to the coating die head provided by the embodiment of the application, the notch groove 115 is formed in the edge of the first side 101 of the die head body 110, and the lip insert 120 is arranged in the notch groove 115, so that the wear resistance of the coating die head is improved at the position easy to be worn due to the fact that the wear resistance of the lip insert 120 is higher than that of the die head body 110, and the service life of the coating die head is prolonged; meanwhile, as the wall surface 111 of the notch groove 115 is in sealing fit with the lip insert 120, and further through the sealing fit of the groove 112 and the protrusion 122, the sealing performance of the connection position of the die head body 110 and the lip insert 120 is improved, and the risk of leakage of slurry flowing through the coating gap 400 from the connection position of the die head body 110 and the lip insert 120 is reduced, so that the reliability of the coating die head is improved.

Further, in the first die 100 of this embodiment, the lip insert 120 with higher wear resistance may be disposed only at the lip, and the die body 110 may be made of conventional general materials, so that the production cost is reduced, and the die body 110 is made of conventional general materials, so that the good performance of the first die 100 may be maintained.

Optionally, as shown in fig. 1 and 3, the notch groove 115 and the groove 112 penetrate through two ends of the first die 100 along the first direction X, and the end surfaces of the two ends of the lip insert 120 along the first direction X are respectively flush with the end surfaces of the two ends of the first die 100 along the first direction X, and the alignment direction of the first die 100, the gasket 300 and the second die 200 is the second direction Z. The outlet of the coating gap 400 is directed in a third direction Y, and the first direction X, the second direction Z, and the third direction are directed in two-by-two intersecting directions.

That is, lip portions of the die body 110 are each provided as a lip insert 120 in the first direction X.

Wherein the arrangement direction of the first die 100, the gasket 300, and the second die 200 is the sequential arrangement direction of the three, which is approximately the height direction of the coating die; the outlet orientation of the coating gap 400 is the outflow direction of the slurry, which is approximately the width direction of the coating die; the first direction X is approximately the length direction of the coating die. Referring to fig. 1 to 3, the second direction Z, which is the arrangement direction of the first die 100, the gasket 300, and the second die 200, may be understood with reference to a substantially vertical direction, the third direction Y, which is the outlet direction of the coating slit 400, may be understood with reference to a substantially horizontal direction, and the first direction X may be understood with reference to a substantially front-rear direction. In some embodiments, the first direction X, the second direction Z, and the third direction Y are oriented two-by-two perpendicularly.

In this embodiment, the lip inserts 120 penetrate through two ends of the die body 110 along the first direction X, so that the side of the first die 100 facing the pole piece waiting for coating is the lip insert 120, and thus, the positions of the first die 100 that are easy to wear can be protected by the lip inserts 120 with higher wear resistance, and the wear resistance of the coating die is improved. And lip insert 120 may be provided as an integral strip, which is advantageous for improving flatness between the lip flow path surface and first side 101 of die body 110, thereby improving coating quality.

Optionally, according to some embodiments of the present application, the face of lip insert 120 that mates with gasket 300 is insert channel face 121, insert channel face 121 being disposed flush with first side 101.

The insert channel surface 121 is disposed flush with the first side 101, and it is understood that the insert channel surface 121 is in the same plane as the first side 101, wherein the flatness of the first channel surface formed by the insert channel surface 121 and the first side 101 is maintained at the micron level, that is, it is considered to be flush.

In this embodiment, the insert flow surface 121 is flush with the first side surface 101, so that the slurry flows smoothly in the process of flowing from the first side surface 101 to the insert flow surface 121, which is beneficial to improving the coating quality.

According to some embodiments of the present application, optionally, as shown in fig. 1, 3 and 4, a wall 111 surrounding the notch groove 115 of the die body 110 includes a first wall 1111 and a second wall 1112, the first wall 1111 is spaced apart from the first side 101, the second wall 1112 intersects the first wall 1111, one end of the second wall 1112 is connected to the first wall 1111, the other end of the second wall 1112 is connected to the first side 101, and the groove 112 is disposed on the second wall 1112.

The first wall 1111 and the second side are walls of the notch groove 115. The first wall 1111 may be disposed substantially parallel to the first side 101, and the second wall 1112 may be disposed between the first wall 1111 and the first side 101 and may be disposed perpendicular to the first wall 1111 and the first side 101, such that the notch groove 115 forms a groove body having an L-shaped cross section. Referring to fig. 1, 3 and 4, the second wall surface 1112 extends upward from the edge of the first side surface 101 to be connected to the first wall surface 1111, and the first wall surface 1111 and the first side surface 101 are substantially horizontally arranged.

Here, the length of the first wall 1111 (the dimension in the first direction X) and the length of the second wall 1112 (the dimension in the first direction X) may be set to be the same, and the width of the second wall 1112 (the dimension in the second direction Z) may be set to be greater than the width of the first wall 1111 (the dimension toward the outlet of the coating slit 400). The second wall 1112 has a larger width to facilitate placement of the recess 112. Meanwhile, in order to reduce the influence of the fastener 130 on the flatness of the first flow surface when the lip insert 120 is connected to the die body 110 through the fastener 130, as shown in fig. 3 to 6, fig. 6 schematically illustrates the structure of the lip insert according to some embodiments of the present application, and the corresponding mounting holes of the fastener are disposed between two opposite sides of the lip insert 120 and on the second wall 1112, and the width of the second wall 1112 is set to be larger, so that the size of the lip insert 120 along the second direction Z may be larger, which may facilitate the setting of the fastener. Further, in some embodiments, as shown in fig. 1, 2 and 7, fig. 7 schematically illustrates a structure of a first die head according to some embodiments of the present application in a bottom view, and the die body 110 is further provided with an adjusting mechanism inside the outlet of the coating gap 400 to adjust the flow uniformity of the slurry. The adjusting mechanism may include an adjusting groove 113 formed in the die body 110, wherein the depth of the adjusting groove 113 is set along the second direction Z, the adjusting groove 113 is communicated with the coating gap 400, the width of the first wall 1111 is smaller, and the width of the die body 110 occupied by the lip insert 120 and the notch groove 115 may be reduced, so that the setting of the adjusting groove 113 and the adjusting member in the adjusting groove 113 may be facilitated.

In this embodiment, the recess 112 is formed as a recess in the second wall 1112. After the coating die is assembled, the second wall 1112 is generally a wall 111 extending along a vertical direction (understood with reference to the second direction Z), while the first wall 1111 is a wall 111 extending along a horizontal direction (understood with reference to the first direction X), the groove 112 is disposed on the second wall 1112, when the protruding portion of the lip insert 120 is inserted into the groove 112, the groove wall of the groove 112 can support the protruding portion from below, so that the lip insert 120 can be temporarily hung on the die body 110 when other fixing is not performed, the subsequent fixing assembly of the lip insert 120 and the die body 110 is facilitated, and after the fixing assembly is completed, the supporting effect of the groove wall of the groove 112 on the protruding portion can also make the connection stability of the lip insert 120 and the die body 110 higher, compared with the manner that the groove 112 is disposed on the first wall 1111, the lip insert 120 is not easy to separate from the die body 110.

Optionally, as shown in fig. 3 and 4, the first wall 1111 is disposed parallel to the first side 101 and the second wall 1112 is disposed perpendicular to the first wall 1111, according to some embodiments of the present application.

It should be understood that the parallelism and the verticality referred to in this embodiment are not strictly required, and may be considered to be parallel or perpendicular within an allowable error, for example, between 175 ° and 185 ° between the first wall 1111 and the first side 101, and between 85 ° and 95 ° between the second wall 1112 and the first wall 1111.

Note that, when the first wall 1111 and the second wall 1112 are perpendicular to each other, the die body 110 of the lip insert 120 and the protrusion 122 are also perpendicular to each other, as shown in fig. 3, 5 and 6, in which the lip insert 120 and the protrusion 122 are matched with the notch groove 115 and the groove 112.

In this embodiment, the first wall 1111 may be disposed substantially parallel to the first side 101, the second wall 1112 is disposed between the first wall 1111 and the first side 101 and may be perpendicular to the first wall 1111 and the first side 101, so that the notch groove 115 forms a right-angle groove body with an L-shaped cross section, which can increase the bonding area between the lip insert 120 and the die body 110, improve the tightness between the lip insert 120 and the die body 110, and improve the slurry permeation resistance due to the right-angle transition between the first wall 1111 and the second wall 1112, thereby also reducing the possibility of permeation.

Optionally, as shown in fig. 3 and 4, the groove 112 is disposed at an end of the second wall 1112 near the first wall 1111, according to some embodiments of the present application.

It will be appreciated that where the groove 112 is disposed at an end of the second wall 1112 adjacent the first wall 1111, the projection 122 is also disposed at an end of the lip insert 120 facing away from the gasket 300.

Specifically, in some embodiments, as shown in fig. 3, 4 and 5, the groove 112 may have an extension surface of the first wall 1111 as a top surface, the rear end of the top of the lip insert 120 protrudes to form the protrusion 122, and the top surface of the protrusion 122 is disposed flush with the top surface of the lip insert 120.

In this embodiment, the groove 112 is disposed at one end of the second wall 1112 near the first wall 1111, so that the protruding portion 122 and the groove 112 are matched at one end of the second wall 1112 near the first wall 1111, so that the second wall 1112 can have a larger continuous area, which is beneficial to improving the flatness of the second wall 1112, thereby improving the fit between the lip insert 120 and the second wall 1112, and improving the tightness between the lip insert 120 and the die body 110.

According to some embodiments of the present application, optionally, the lip insert 120 is in abutting sealing connection with the first wall 1111 and the second wall 1112, respectively.

Specifically, as shown in fig. 1, 5 and 6, the lip insert 120 has a first surface 125 and a second surface 126, the first surface 125 is adjacent to and connected to the second surface 126, and the first surface 125 may be the same size as the first wall 1111 and in contact fit; the second surface 126 is the same size as the second wall 1112 and is in contact engagement.

By sealing lip insert 120 against first wall 1111 and lip insert 120 against second wall 1112, a larger sealing area is provided between the surface of lip insert 120 and wall 111 of die body 110, which improves the sealing between lip insert 120 and die body 110 and reduces the likelihood of slurry leakage.

According to some embodiments of the present application, optionally, the protrusion 122 is in conforming sealing connection with the circumferential side wall 1121 of the groove 112 and the protrusion 122 is in conforming sealing connection with the bottom wall 1122 of the groove 112.

That is, the top surface of the projection 122 is in mating sealing engagement with the bottom wall 1122 of the groove 112, and the circumferential side surface of the projection 122 is in mating sealing engagement with the circumferential side wall 1121 of the groove 112. Thus, a larger sealing area is provided between the surface of the protrusion 122 and the wall 111 of the die body 110, so that the sealing property between the lip insert 120 and the die body 110 can be improved, and the leakage possibility of slurry can be reduced.

According to some embodiments of the present application, optionally, a sealant is filled between the lip insert 120 and the wall 111 of the notch groove 115 and/or between the protrusion 122 and the wall of the groove 112.

Specifically, the wall 111 between the lip insert 120 and the notch 115 may be filled with sealant, and the wall between the protrusion 122 and the groove wall of the groove 112 may be filled with sealant. The walls of groove 112 may include, among other things, circumferential side walls 1121 of groove 112 and bottom wall 1122 of groove 112.

In the process of assembling lip insert 120 to die body 110, liquid sealing solvent may be filled in notch groove 115 and groove 112, then lip insert 120 is assembled to notch groove 115, and protrusion 122 is inserted into groove 112, after a period of time, the liquid sealing solvent will air dry and stay between wall 111 of notch groove 115 and lip insert 120 and between protrusion 122 and the wall of groove 112 to form a solid sealant. Wherein, the sealant can be made of corrosion-resistant and high-pressure-resistant materials so as to improve the stability of the sealant.

By arranging the sealant, the sealing performance between the lip insert 120 and the die head body 110 can be improved, and the risk of leakage of slurry from the connection position between the lip insert 120 and the die head body 110 can be reduced.

Optionally, lip insert 120 is a zirconia ceramic insert and/or die body 110 is a metallic piece according to some embodiments of the present application.

In some embodiments, the lip insert 120 is a zirconia ceramic insert, and the zirconia ceramic lip insert 120 has high hardness, high wear resistance, corrosion resistance, and no chemical reaction with the slurry, so that the service life of the die lip can be greatly prolonged.

In some embodiments, die body 110 is a metal piece, which may be a stainless steel piece in particular.

It should be noted that, the die body 110 is a metal piece, and it is understood that the main material of the die body 110 is metal, and other material layers may be disposed thereon, for example, a plating layer may be disposed thereon.

According to some embodiments of the present application, optionally, as shown in fig. 5 and 6, the lip insert 120 protrudes toward the first side with a first outlet portion 123. The first outlet portion 123 and the protruding portion 122 are respectively disposed on opposite sides of the lip insert 120, the first outlet portion 123, the gasket 300 and the second die 200 cooperate to form an outlet of the coating gap 400, the side surface of the first outlet portion 123 facing the gasket 300 is flush with the first side surface 101, the thickness of the first outlet portion 123 is tapered along the direction deviating from the protruding portion 122, and the thickness of the first outlet portion 123 is the dimension of the first outlet portion 123 along the arrangement direction of the first die 100, the gasket 300 and the second die 200.

Wherein the first outlet 123 is a part of the lip insert 120, in the second direction Z, the first outlet 123 is located at an end of the lip insert 120 near the gasket 300, and the protrusion may be located at an end of the lip insert 120 far from the gasket 300; along the outlet direction of the coating gap 400, the first outlet portion 123 is located at a first side of the lip insert 120, and the protruding portion is located at a side of the lip insert 120 facing away from the first side. The side of the first outlet portion 123 facing the gasket 300 may be in the same plane as the first side 101, in other words, the side of the first outlet portion 123 facing the gasket 300 may be understood as an outlet portion of the first flow path surface. Since the side of the first outlet portion 123 facing the gasket 300 is flush with the first side 101, such that the thickness of the first outlet portion 123 is defined by the tapering, i.e. in the second direction Z, the side of the first outlet portion 123 facing away from the gasket 300 is provided with an inclined surface.

It can be appreciated that the thickness of the first outlet 123 is tapered, so that the thickness of the lip insert 120 at the outlet of the coating gap 400 is smaller, which is beneficial to controlling the coating area of the coating die and improving the stability of the surface density of the coating die coated on the piece to be coated.

In some embodiments, the second die 200 may be provided with a second outlet portion 220 disposed symmetrically to the first outlet portion 123, and the first outlet portion 123, the second outlet portion 220, and the gasket 300 therebetween form an outlet of the coating gap 400.

According to some embodiments of the application, optionally, the edge of the first outlet portion 123 facing the first side has a thickness H of 0.5 to 1 mm.

The edge of the first outlet portion 123 toward the first side is a position corresponding to the minimum thickness of the lip insert 120, which is also the outlet end of the coating die.

The thickness H of the edge of the first outlet portion 123 facing the first side may specifically be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 1 mm.

The thickness of the edge of the first outlet 123 is limited in this embodiment, which is advantageous for further controlling the coating area of the coating die, and improving the stability of the area density of the coating die coated on the piece to be coated.

According to some embodiments of the present application, optionally, as shown in fig. 7, the first die 100 is provided with an adjustment groove 113 for mounting an adjustment member. The depth of the regulating groove 113 is set along the arrangement direction of the first die 100, the gasket 300 and the second die 200, the regulating groove 113 communicates with the coating slit 400, and the regulating groove 113 and the notch groove 115 are spaced apart along the direction in which the outlet of the coating slit 400 faces.

Wherein, the adjusting member may include an adjusting block (not shown in the drawing) and a driving mechanism (not shown in the drawing), the adjusting block is disposed in the adjusting slot 113, the adjusting block may move in the adjusting slot 113 along the second direction Z, one end of the adjusting block, which is close to the gasket 300, participates in forming the coating gap 400, one end of the adjusting block, which is away from the gasket 300, is connected with the driving mechanism, the driving mechanism may be disposed on the die body 110, when the driving mechanism drives the adjusting block to move downwards, the thickness of the coating gap 400 at the corresponding position may be reduced, thereby reducing the coating thickness of the slurry, and when the adjusting block moves upwards, the thickness of the coating gap 400 at the corresponding position may be increased, thereby increasing the coating thickness of the slurry. The number of the adjusting blocks can be provided with a plurality of blocks which are sequentially arranged along the first direction X, and the thickness of the slurry along the first direction X can be uniform by respectively adjusting the plurality of blocks. The driving mechanism may be a micrometer, etc., and an operation portion of the driving mechanism may be exposed above the first die head 100 so as to be convenient to operate, and a mounting groove 116 may be provided on the die head body 110 of the first die head 100, the mounting groove 116 being used for mounting the driving mechanism.

The direction in which the outlet of the coating slit 400 is oriented, i.e., the outlet of the coating slit 400 is oriented, can be understood with reference to the width direction of the coating die.

Along the direction of the outlet of the coating gap 400, the adjusting groove 113 and the notch groove 115 are arranged at intervals, that is, a solid structure of part of the die body 110 is reserved between the notch groove 115 and the adjusting groove 113. In this way, the likelihood of slurry flowing from the conditioning tank 113 to the notch tank 115, or from the notch tank 115 to the conditioning tank 113, can be reduced, and thus the likelihood of slurry leakage can be reduced.

According to some embodiments of the application, optionally, the minimum distance w between the adjustment slot 113 and the notch slot 115 is greater than or equal to 5 millimeters in the direction in which the outlet of the coating slot 400 is oriented.

Specifically, the minimum distance w between the adjustment groove 113 and the notch groove 115, that is, the width of the solid structure between the adjustment groove 113 and the notch groove 115, may be set to be greater than or equal to 5 mm, and specifically may be 5 mm, 6 mm, 7 mm, or the like.

It should be noted that the maximum distance between the adjustment slot 113 and the notch slot 115 should not affect the function of the first die 100. In some coating dies, the position of the adjustment slot 113 is substantially determined, such that the distance between the adjustment slot 113 and the edge of the lip insert 120 along the outlet of the coating slot 400 is substantially determined, and the distance between the adjustment slot 113 and the notch slot 115 is mainly determined by the width of the lip insert 120, so that the maximum distance between the adjustment slot 113 and the notch slot 115 can be reasonably set on the premise of enabling a relatively stable installation of the lip insert 120.

The size of the minimum distance w between the regulating groove 113 and the notch groove 115 according to the present embodiment is limited, so that the possibility of deformation of the portion of the die body 110 between the regulating groove 113 and the notch groove 115 can be reduced, and the possibility of unsmooth movement of the regulating member can be reduced.

According to some embodiments of the present application, optionally, as shown in fig. 1, 2 and 8, fig. 8 schematically illustrates a partial cross-sectional view of a lip insert of some embodiments of the present application coupled to a die body by a fastener; the first mounting hole 124 is disposed on the lip insert 120, and the first mounting hole 124 penetrates through opposite sides of the lip insert 120 along the third direction Y, and the third direction Y is consistent with the direction in which the outlet of the coating slit 400 faces. The second wall surface 1112 is provided with a second mounting hole 114, and the second mounting hole 114 is aligned with the first mounting hole 124 in a position corresponding to that of the first mounting hole; the coating die further includes a fastener 130, the fastener 130 being threaded and coupled to the first and second mounting holes 124, 114.

The fastener 130 may be a screw, bolt, or the like, and the first and second mounting holes 124 and 114 may be threaded holes, respectively. Fastener 130 is secured to die body 110 by threading through and connecting to first mounting hole 124 and second mounting hole 114 such that lip insert 120 is secured to die body.

The first mounting holes 124 and the second mounting holes 114 may be provided in a plurality of one-to-one correspondence, and the plurality of first mounting holes 124 may be arranged at intervals along the first direction X, or may be arranged at intervals along the second direction Z, and the plurality of first mounting holes 124 may be provided at equal intervals. In the second direction Z, the first mounting hole 124 and the second mounting hole 114 may be disposed offset from the protrusion and the groove 112, and in particular, the first mounting hole 124 and the second mounting hole 114 may be located at a side of the protrusion and the groove 112 near the gasket 300.

In this embodiment, the lip insert 120 can be fastened on the die body 110 by matching the fastener 130, the first mounting hole 124 and the second mounting hole 114, so that the connection stability of the lip insert 120 and the die body 110 is improved; and the first and second mounting holes 124 and 114 are equivalent to extending in the third direction Y, and the fastener 130 can be assembled from the side of the lip insert 120, so that not only is the assembly convenient, but also the flatness of the first flow surface is not affected, and the flow uniformity of the slurry is improved.

Optionally, according to some embodiments of the application, an end of the first mounting hole 124 facing away from the second wall 1112 is provided with a plug 140.

As shown in fig. 8, the first mounting hole 124 may be a counter bore and the blocking member 140 may be disposed within a head of the counter bore. The blocking piece 140 may be an elastic plastic or plastic piece, specifically may be a teflon material or other corrosion-resistant material, and the blocking piece 140 may be disposed in the head of the counterbore in an interference manner. The blocking member 140 may cover the outer side of the fastener 130.

By providing the blocking member 140, the risk of the slurry overflowing along the gap between the fastener 130 and the first mounting hole 124 and the gap between the fastener 130 and the second mounting hole 114 can be reduced, and the risk of the slurry blocking the head of the first mounting hole 124, resulting in failure to disassemble the fastener 130, can be reduced.

Some embodiments of the present application also provide a coating apparatus comprising a coating die according to the present application or any of the embodiments of the present application.

It will be appreciated that the coating apparatus may also include means such as a coating roll, a support means, a conduit for transporting slurry, etc., wherein the conduit is connected to the coating die for transporting slurry to the coating die, the coating roll may be used to support or transport the pole piece waiting coating, and the coating die may be mounted on the support means.

Some embodiments of the present application also provide a battery production system including the coating apparatus of the present application or any of the embodiments of the present application.

The coating apparatus may be used to coat the active material on the substrate of the opposing pole piece.

Referring to fig. 1 to 8, some embodiments of the present application provide a coating die including a first die 100, a second die 200, and a gasket 300, the first die 100 being connected to the second die 200, the gasket 300 being disposed between the first die 100 and the second die 200, and the gasket 300 being fitted between the first die 100 and the second die 200 to form a coating gap 400, an outlet of the coating gap 400 being directed toward a first side of the coating die; first die 100 includes die body 110 and lip insert 120, and the wear resistance of lip insert 120 is higher than the wear resistance of die body 110, and die body 110 has first side 101 with gasket 300 complex, and die body 110 is provided with notch groove 115 at the edge of first side 101, and is provided with recess 112 on the wall 111 of die body 110 surrounding notch groove 115, and lip insert 120 sets up in notch groove 115 to with wall 111 sealing connection, lip insert 120 has bulge 122, bulge 122 sets up in recess 112, and sealing connection with the cell wall of recess 112.

The notch groove 115 and the groove 112 penetrate through two ends of the first die 100 along the first direction X, the end surfaces of two ends of the lip insert 120 along the first direction X are respectively flush with the end surfaces of two ends of the first die 100 along the first direction X, the arrangement direction of the first die 100, the gasket 300 and the second die 200 is the second direction Z, the direction in which the outlet of the coating gap 400 faces is the third direction Y, and the directions of the first direction X, the second direction Z and the outlet of the coating gap 400 face each other. The surface of the lip insert 120 matching the gasket 300 is an insert channel surface 121, and the insert channel surface 121 is disposed flush with the first side 101. The wall surface 111 includes a first wall surface 1111 and a second wall surface 1112, the first wall surface 1111 is disposed at an interval from the first side surface 101, the second wall surface 1112 intersects the first wall surface 1111, one end of the second wall surface 1112 is connected to the first wall surface 1111, the other end of the second wall surface 1112 is connected to the first side surface 101, and the groove 112 is disposed on the second wall surface 1112 and is located at one end of the second wall surface 1112 close to the first wall surface 1111. The lip insert 120 is bonded to and sealed with the first wall 1111 and the second wall 1112, respectively. The sealing connection between the projection 122 and the circumferential side wall 1121 of the groove 112 and between the projection 122 and the bottom wall 1122 of the groove 112. Sealant is filled between the lip insert 120 and the wall surface 111 surrounding the notch groove 115 and between the projection 122 and the groove wall of the groove 112. Lip insert 120 is a zirconia ceramic insert and the body of die body 110 is a stainless steel piece.

The lip insert 120 protrudes toward the first side and has a first outlet 123, the first outlet 123 and the protruding portion are respectively disposed on opposite sides of the lip insert 120, the first outlet 123, the gasket 300 and the second die 200 are matched to form an outlet of the coating gap 400, the first outlet 123 faces the side of the gasket 300 and is flush with the first side 101, the thickness of the first outlet 123 tapers along the direction deviating from the protruding portion, the thickness of the first outlet 123 is the dimension of the first outlet 123 along the arrangement direction of the first die 100, the gasket 300 and the second die 200, and the thickness of the first outlet 123 faces the edge of the first side is 0.5 mm. The first die 100 is provided with an adjustment groove 113 for mounting an adjustment member, the adjustment groove 113 is provided in a depth along the first outlet portion 123 in an arrangement direction of the first die 100, the gasket 300 and the second die 200, the adjustment groove 113 is communicated with the coating slit 400, and the adjustment groove 113 is provided at an interval of 5 mm from the notch groove 115 in a third direction Y in which an outlet of the coating slit 400 faces.

The first mounting holes 124 are formed in the lip insert 120, the first mounting holes 124 penetrate through two opposite side surfaces of the lip insert 120 along a third direction Y, the third direction Y is consistent with the direction in which the outlet of the coating gap 400 faces, the second wall surface 1112 is provided with the second mounting holes 114, and the second mounting holes 114 are arranged in an aligned manner in correspondence with the positions of the first mounting holes 124; screws are inserted through and coupled to first and second mounting holes 124 and 114 to lock lip insert 120 to die body 110. First mounting hole 124 is provided with a blocking member 140 at an end facing away from die body 110.

The second die 200 may be an integral structure, and the lip and the main body may be made of metal. The second die 200 is provided as an integral structure, which is advantageous in improving the flatness of the second flow surface 201 of the second die 200 and improving the flow uniformity of the slurry.

The foregoing description of various embodiments is intended to highlight differences between the various embodiments, which may be the same or similar to each other by reference, and is not repeated herein for the sake of brevity.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A coating die, comprising:

a first die;

The second die head is connected with the first die head;

A gasket arranged between the first die head and the second die head, wherein the gasket is matched between the first die head and the second die head to form a coating gap, the coating die head is provided with a first side, and the first side is the side facing to the outlet of the coating gap;

The first die head comprises a die head body and a lip insert, the wear resistance of the lip insert is higher than that of the die head body, the die head body is provided with a first side surface matched with a gasket, the die head body is provided with a notch groove at the edge of the first side surface corresponding to the first side surface, the lip insert is arranged in the notch groove and is in sealing connection with the wall surface of the notch groove, a groove is formed in the wall surface, the groove is recessed relative to the wall surface, the lip insert is provided with a protruding portion, and the protruding portion is arranged in the groove and is in sealing connection with the wall of the groove.

2. The coating die of claim 1, wherein the notch groove and the groove each penetrate through two ends of the first die in a first direction, end surfaces of two ends of the lip insert in the first direction are respectively flush with end surfaces of two ends of the first die in the first direction, an arrangement direction of the first die, the gasket and the second die is a second direction, a direction in which an outlet of the coating gap faces is a third direction, and the first direction, the second direction and the third direction are intersected two by two.

3. The coating die of claim 2, wherein the face of the lip insert that mates with the shim is an insert flow face that is disposed flush with the first side face.

4. A coating die according to any one of claims 1 to 3, wherein the wall surfaces comprise a first wall surface and a second wall surface, the first wall surface is disposed at a distance from the first side surface, the second wall surface intersects the first wall surface, one end of the second wall surface is connected to the first wall surface, the other end of the second wall surface is connected to the first side surface, and the groove is disposed in the second wall surface.

5. The coating die of claim 4, wherein the first wall is disposed parallel to the first side and the second wall is disposed perpendicular to the first wall.

6. The coating die of claim 5, wherein the groove is disposed at an end of the second wall adjacent the first wall.

7. The coating die of claim 4, wherein the lip insert is in conforming sealing connection with the first wall and the second wall, respectively.

8. A coating die according to any one of claims 1 to 3, wherein the projections are in a snug sealing connection with the circumferential side walls of the recess and with the bottom wall of the recess.

9. A coating die according to any one of claims 1-3, characterized in that between the lip insert and the wall surface and/or between the projection and the wall of the groove is filled with a sealing compound.

10. A coating die according to any one of claims 1 to 3, wherein the lip insert is a zirconia ceramic insert and/or the die body is a metal piece.

11. A coating die according to any one of claims 1 to 3, wherein the lip insert projects towards the first side with a first outlet portion, the first outlet portion and the projection being respectively provided on opposite sides of the lip insert, the first outlet portion, the gasket and the second die cooperating to form an outlet of the coating slot, the first outlet portion being provided flush with the first side face towards the side face of the gasket, the thickness of the first outlet portion tapering in a direction away from the projection, the thickness of the first outlet portion being the dimension of the first outlet portion in the direction of arrangement of the first die, the gasket and the second die.

12. The coating die of claim 11, wherein the edge of the first outlet portion toward the first side has a thickness of 0.5 millimeters to 1 millimeter.

13. A coating die according to any one of claims 1 to 3, wherein an adjustment groove for mounting an adjustment member is provided in the first die, the adjustment groove is provided in a depth along an arrangement direction of the first die, the gasket, and the second die, the adjustment groove communicates with the coating slit, and is provided at an interval between the adjustment groove and the notch groove along a third direction, the third direction being coincident with a direction in which an outlet of the coating slit faces.

14. The coating die of claim 13, wherein a minimum distance between the adjustment slot and the relief slot in the third direction is greater than or equal to 5 millimeters.

15. The coating die of claim 4, wherein the lip insert is provided with first mounting holes penetrating through opposite sides of the lip insert in a third direction, the third direction being consistent with a direction in which an outlet of the coating slot faces, the second wall surface is provided with second mounting holes, and the second mounting holes are aligned in correspondence with the first mounting holes;

The coating die head further comprises a fastener, and the fastener penetrates through and is connected with the first mounting hole and the second mounting hole.

16. The coating die of claim 15, wherein an end of the first mounting hole facing away from the die body is provided with a plug.

17. A coating apparatus comprising the coating die of any one of claims 1-16.

18. A battery production system comprising the coating apparatus of claim 17.