Coating die head and coating device

Abstract

The utility model discloses a coating die head and a coating device, and belongs to battery pole piece processing equipment. The coating die head comprises a die head body, an adjusting mechanism and a first die lip. A containing cavity with a lip is formed in the die head body, and the lip is used for allowing first slurry to flow out of the containing cavity; the adjusting mechanism is arranged on one side, in the height direction of the die head body, of the lip, and the adjusting mechanism is used for driving the die head body to elastically deform so as to adjust the size of the lip in the height direction; the inner side, close to the adjusting mechanism, of the lip is sunken to form a first groove, and the first die lip is contained in the first groove; wherein the first die lip is made of ceramic, and the first die lip is connected with the bottom wall of the first groove. By adopting the coating die head with the structure, the abrasion of slurry to the lip can be reduced, and the coating quality is improved.

Description

Technical Field

[0001] The present application relates to the field of battery pole piece processing equipment, and more specifically, to a coating die head and a coating device. Background Art

[0002] Coating is an essential process in the battery production process, and is mainly used in the production of battery pole pieces. Coating in pole piece production refers to the process of coating the prepared paste-like viscous slurry evenly, continuously or intermittently on the pole piece substrate through the lip of the coating die head.

[0003] When the slurry passes through the lip, it is easy to wear or corrode the coating at the lip, thereby reducing the linearity of the lip and affecting the quality of the coating. Utility Model Content

[0004] The embodiments of the present application provide a coating die head and a coating device, which can reduce the wear of the lip by the slurry and improve the quality of coating.

[0005] In the first aspect, the embodiment of the present application provides a coating die, including a die body, an adjustment mechanism and a first die lip. A receiving cavity with a lip is formed inside the die body, and the lip is used for allowing the first slurry to flow out of the receiving cavity; the adjustment mechanism is arranged on one side of the lip in the height direction of the die body, and the adjustment mechanism is used to drive the die body to elastically deform to adjust the size of the lip in the height direction; the lip is concave near the inner side of the adjustment mechanism to form a first groove, and the first die lip is accommodated in the first groove; wherein the first die lip is made of ceramic, and the first die lip is connected to the bottom wall of the first groove.

[0006] In the above technical solution, the first die lip is made of ceramic so that the hardness of the first die lip is improved, thereby improving the wear resistance of the first die lip, thereby reducing the risk of the first slurry wearing the first die lip, thereby reducing the risk of reduced linearity of one side of the lip due to wear of the first die lip during coating, thereby improving the coating quality; at the same time, the inner side of the lip close to the adjusting mechanism is recessed to form a first groove, and since the first die lip is connected to the bottom wall of the first groove, that is, the first die lip is connected to the wall of the first groove on the side close to the adjusting mechanism, and then when the adjusting mechanism drives the die body to elastically deform, the first die lip can be driven by the connection between it and the first groove to follow the deformation of the die body, thereby facilitating the adjustment of the size of the lip in the height direction, reducing the risk of reduced linearity of the lip due to the first die lip not following the deformation of the die body, thereby improving the coating quality.

[0007] In some embodiments, the first die lip is welded and / or bonded to the bottom wall of the first groove.

[0008] In the above technical solution, the first die lip and the bottom wall of the first groove are connected by welding and / or bonding, which can effectively improve the connection firmness and reliability between the first die lip and the bottom wall of the first groove, and is beneficial to reduce the risk of the first die lip and the bottom wall of the first groove falling off from each other during use, so as to improve the reliability of the lip.

[0009] In some embodiments, the die body has a first side in its width direction, and the lip is located on the first side; the die body has a second side in the height direction, and the second side is recessed to form a first adjustment groove, and along the height direction, the first groove and the first adjustment groove are arranged in sequence; along the width direction, the first adjustment groove has a first wall and a second wall arranged oppositely, and the first wall is located between the second wall and the accommodating cavity; the adjustment mechanism includes a first adjusting member, the first adjusting member is connected to the second wall, and is configured to drive the second wall to elastically deform in a direction close to the first wall.

[0010] In the above technical scheme, the first groove and the first adjustment groove are arranged in sequence along the height direction, and along the width direction, the first adjustment groove has a first wall and a second wall arranged oppositely, and the first adjustment member is connected to the second wall, that is, the bottom wall of the first adjustment groove and the bottom wall of the first groove are respectively the opposite sides of the part of the die body in the height direction, and the first adjustment member is configured to drive the second wall to elastically deform in the direction close to the first wall, thereby driving the bottom wall of the first adjustment groove connected to the second wall to elastically deform in the direction away from the lip, thereby driving the bottom wall of the first groove to elastically deform in the direction away from the other side of the lip, and then driving the first die lip to elastically deform in the other side away from the lip, thereby adjusting the size of the lip in the height direction to adjust the thickness of the first slurry leaving the containing cavity from the lip, and the structure is simple and easy to implement.

[0011] In some embodiments, along the width direction, the first die lip has a first surface close to the accommodating cavity, the first groove has a third wall close to the accommodating cavity, and the first surface is attached to the third wall.

[0012] In the above technical solution, the first surface is attached to the third wall, and there is no gap between the first die lip and the third wall in the width direction. Therefore, when the first slurry leaves the containing cavity from the lip, the flow rate of the first slurry is reduced due to entering the gap between the first die lip and the third wall in the width direction. The risk of coating quality is reduced, thereby improving the coating quality.

[0013] In some embodiments, along the width direction, the first surface is located between the accommodating cavity and the first wall.

[0014] In the above technical solution, along the width direction, the first surface is located between the accommodating cavity and the first wall, and then when the first adjusting member drives the bottom wall of the first adjusting groove connected to the second wall to elastically deform in a direction away from the lip, thereby driving the bottom wall of the first groove to elastically deform in a direction away from the other side of the lip, and driving the first mold lip to elastically deform in a direction away from the other side of the lip, the first surface is located in an area with less deformation or no deformation, thereby reducing the risk of a gap between the first surface and the third wall due to deformation of the first surface, thereby causing flow rate disturbance of the first slurry, thereby improving the coating quality.

[0015] In some embodiments, a dimension of the first die lip in the height direction is H, satisfying 3mm≤H≤8mm.

[0016] In the above technical solution, when H≥3mm, on the one hand, the first die lip has a certain strength, reducing the risk of cracking when the first die lip is elastically deformed, and on the other hand, the volume of the first die lip that needs to be cut during processing is reduced, reducing the processing difficulty of the first die lip and reducing the processing cost; when H≤8mm, the first die lip is easy to follow the elastic deformation of the bottom wall of the first groove, reducing the risk of cracking at the connection between the first die lip and the bottom wall of the first groove when the die body is elastically deformed; therefore, when 3mm≤H≤8mm, the first die lip has a certain strength and is not easy to crack when it is elastically deformed, and is also easy to process, and is easy to follow the elastic deformation of the bottom wall of the first groove, thereby reducing the risk of cracking at the connection between the first die lip and the bottom wall of the first groove when the die body is elastically deformed.

[0017] In some embodiments, the first groove penetrates the die body along the length direction of the die body.

[0018] In the above technical solution, the first groove penetrates the die body along the length direction of the die body, so that both ends of the first groove in the length direction are open structures, which is convenient for applying external force to the first die lip through the two ends of the first groove in the length direction when disassembling and replacing the first die lip, thereby facilitating the disassembly and replacement of the first die lip.

[0019] In some embodiments, the die body has a first side in a width direction thereof, the lip is located on the first side, and the first groove extends to the first side along the width direction.

[0020] In the above technical solution, the first groove extends to the first side along the width direction, so that one side of the first groove in the width direction is an open structure, which is convenient for applying external force to the first die lip through one side of the first groove in the width direction when disassembling and replacing the first die lip, thereby facilitating the disassembly and replacement of the first die lip.

[0021] In some embodiments, the coating die head further includes a second die lip; the lip is recessed away from the inner side of the adjustment mechanism to form a second groove, the second die lip is accommodated in the second groove, and the second die lip is made of ceramic.

[0022] In the above technical solution, the second die lip is made of ceramic so that the hardness of the second die lip is improved, thereby improving the wear resistance of the second die lip, thereby reducing the risk of the first slurry wearing the second die lip, thereby reducing the risk of reduced linearity on the other side of the lip due to wear of the second die lip during the coating process, thereby improving the coating quality.

[0023] In some embodiments, the lip is recessed away from the inner side of the adjustment mechanism to form a second adjustment groove, and along the width direction of the die body, the second adjustment groove is located between the accommodating cavity and the second groove; a second adjustment member is adjustably arranged in the second adjustment groove along the height direction, and the second adjustment member protrudes from the second adjustment groove along the height direction to adjust the size of the lip in the height direction.

[0024] In the above technical solution, the second adjusting member is protruded out of the second adjusting groove in the height direction to adjust the size of the lip in the height direction, thereby adjusting the flow of the first slurry to adjust the coating thickness of the first slurry. The structure is simple and easy to implement.

[0025] In some embodiments, the die body includes a first die and a second die stacked along the height direction, the first die and the second die enclose the accommodating cavity, and the first groove is arranged on the side of the first die facing the second die; the coating die also includes a gasket, along the height direction, the gasket is located between the first die and the second die, the gasket is recessed on one side of the die body in the width direction to form a notch, and the notch and the opposite sides of the first die and the second die form the lip.

[0026] In the above technical solution, a gasket is arranged between the first die head and the second die head in the height direction so that there is a gap between the first die head and the second die head, and a lip is formed by enclosing the notch of the gasket and the opposite sides of the first die head and the second die head, and the accommodating cavity and the lip are connected through the notch, so the structure is simple and easy to implement.

[0027] In some embodiments, the gasket has a third surface facing the first die head and a fourth surface facing the second die head in the height direction, the third surface is recessed to form a third groove, the fourth surface is recessed to form a fourth groove, the third groove and the fourth groove extend along the width direction, one end of the third groove is connected to one end of the fourth groove, and the third groove and the fourth groove are enclosed with the sides opposite to the first die head and the second die head to form a flow channel for accommodating the second slurry.

[0028] In the above technical solution, the third groove and the fourth groove are enclosed with the sides opposite to the first die head and the second die head to form a flow channel for accommodating the second slurry, so that a part of the flow channel is located on the side of the gasket close to the first die head, and the other part of the flow channel is located on the side of the gasket close to the second die head, so that the flow channel can avoid the gap between the gasket and the first die head and the second die head caused by the structural parts (such as the second adjusting part) on the first die head and the second die head, thereby reducing the risk of the second slurry mixing with the first slurry from the inlet lip due to the gap between the gasket and the first die head and the second die head.

[0029] In some embodiments, the first groove is located on the third surface, the first die lip has a first surface close to the accommodating cavity in the width direction, the first groove has a third wall close to the accommodating cavity in the width direction, and the first surface is attached to the third wall; on a plane perpendicular to the height direction, the orthographic projection of the first surface overlaps with the orthographic projection of the fourth groove.

[0030] In the above technical solution, on a plane perpendicular to the height direction, the orthographic projection of the first surface overlaps with the orthographic projection of the fourth groove, so that when the second slurry flows through the joint of the first surface and the third wall in the flow channel, the gasket can be located between the second slurry and the joint of the first surface and the third wall in the height direction, thereby reducing the risk of the second slurry flowing from the joint of the first surface and the third wall into the lip and mixing with the first slurry.

[0031] In a second aspect, an embodiment of the present application further provides a coating device, comprising the above-mentioned coating die head. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1A schematic diagram of the structure of a coating die provided in some embodiments of the present application;

[0034] Figure 2 for Figure 1 Sectional view of AA in the middle;

[0035] Figure 3 for Figure 2 The enlarged view of point B in the middle;

[0036] Figure 4 An exploded view of the structure of a coating die provided in some embodiments of the present application;

[0037] Figure 5 for Figure 4 Enlarged view of point C in the middle.

[0038] Icon: 100- coating die;

[0039] 10-die body; 10A-accommodating cavity; 10B-lip; 10C-feeding port; 10D-first adjustment slot; 101D-first wall; 102D-second wall; 10E-second adjustment slot; 10F-second mounting hole; 10G-first mounting hole; 10H-third mounting hole; 101-first side; 102-second side; 103-third side;

[0040] 11-first die head; 111-first groove; 111A-bottom wall of the first groove; 111B-third wall;

[0041] 12-second die head; 121-second groove;

[0042] 20-adjusting mechanism; 21-first adjusting member;

[0043] 30-first die lip; 31-first surface;

[0044] 40-second die lip; 41-second surface;

[0045] 50 - second adjusting member;

[0046] 60-gasket; 61-notch; 62-third surface; 62A-third groove; 63-fourth surface; 63A-fourth groove; 64-avoidance groove;

[0047] X-width direction; Y-length direction; Z-height direction. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0050] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0054] The term “plurality” used in this application refers to two or more (including two).

[0055] Pole coating refers to the process of evenly, continuously or intermittently coating the prepared coating slurry on the substrate (aluminum foil or copper foil) during the production of lithium batteries, which is one of the key steps in preparing batteries. Coating needs to ensure the consistency of thickness at each coating position and control the coating thickness within the tolerance range required by the process. The quality and stability of the pole coating process have an important impact on battery performance and cycle life.

[0056] There are two commonly used coating methods in China: transfer coating and extrusion coating. Transfer coating is a mature technology, but its structure is complex and the equipment debugging is cumbersome. Moreover, the slurry of transfer coating is in an exposed state (that is, the coating slurry is exposed to the air), and the performance of the coating slurry is difficult to guarantee.

[0057] The technology of extrusion coating machine is becoming more and more mature. It has simple structure, compact equipment and convenient debugging. In addition, the coating slurry in the coating head is in a closed state and isolated from the outside world, which can ensure the excellent quality of the coating slurry. Moreover, the coating accuracy of the extrusion coating machine is much higher than that of the traditional transfer coating machine. The current experimental results show that the minimum thickness limit of transfer coating is 50um, while the extrusion coating can reach 20um. Therefore, it has become a development trend to use extrusion coating machine to coat lithium-ion battery pole pieces.

[0058] The coating die is an important component of the coating device, which is used to evenly apply the coating slurry on the surface of the substrate (positive electrode substrate or negative electrode substrate). The coating die usually has a cavity inside to accommodate the first slurry (positive electrode active material or negative electrode active material).

[0059] As an example, the negative electrode substrate may be a metal foil, a foamed metal or a composite current collector. For example, as the metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, nickel or titanium, etc. may be used. The foamed metal may be foamed nickel, foamed copper, foamed aluminum, foamed alloy, etc. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0060] As an example, the negative electrode sheet may include a negative electrode substrate and a negative electrode active material disposed on at least one surface of the negative electrode substrate.

[0061] As an example, the negative electrode substrate has two surfaces that are opposed to each other in its thickness direction, and the negative electrode active material is provided on either or both of the two opposing surfaces of the negative electrode substrate.

[0062] As an example, the negative electrode active material may adopt the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0063] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0064] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0065] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0066] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0067] The coating die heads currently used in the coating process are mainly metal bodies and surfaces coated with high-hardness coatings such as DLC or chromium nitride. The thickness of the coating is between 2-8um. Even if the coating is hard and wear-resistant, the die body material is relatively soft, and the spray coating is easy to wear as a whole, with a short lifespan. In addition, some coatings are not corrosion-resistant and will react chemically with the slurry. After the die head is worn, the straightness of the die lip will deteriorate. Poor straightness of the die lip will lead to poor coating consistency, thus affecting the coating quality and the quality of the pole piece.

[0068] Based on the above considerations, in order to reduce the wear of the lip by the slurry and improve the quality of coating. An embodiment of the present application provides a coating die, including a die body, an adjustment mechanism and a first die lip. A receiving cavity with a lip is formed inside the die body, and the lip is used for the first slurry to flow out of the receiving cavity; the adjustment mechanism is arranged on one side of the lip in the height direction of the die body, and the adjustment mechanism is used to drive the elastic deformation of the die body to adjust the size of the lip in the height direction; the lip is concave near the inner side of the adjustment mechanism to form a first groove, and the first die lip is accommodated in the first groove; wherein, the first die lip is made of ceramic, and the first die lip is connected to the bottom wall of the first groove.

[0069] In a coating die of this structure, the first die lip is made of ceramic to improve the hardness of the first die lip, thereby improving the wear resistance of the first die lip, thereby reducing the risk of the first slurry wearing the first die lip, thereby reducing the risk of reduced linearity of one side of the lip due to wear of the first die lip during coating, thereby improving the coating quality; at the same time, the lip is recessed on the inner side close to the adjusting mechanism to form a first groove, and because the first die lip is connected to the bottom wall of the first groove, that is, the first die lip is connected to the wall of the first groove on the side close to the adjusting mechanism, and then when the adjusting mechanism drives the die body to elastically deform, the first die lip can be driven by the connection between it and the first groove to follow the deformation of the die body, thereby facilitating the adjustment of the size of the lip in the height direction, reducing the risk of reduced linearity of the lip due to the first die lip not following the deformation of the die body, thereby improving the coating quality.

[0070] The specific structure of the coating die head is described in detail below in conjunction with the accompanying drawings.

[0071] Please refer to Figure 1 and Figure 2 , and please refer to Figure 3 , Figure 1 This is a schematic diagram of the structure of a coating die head 100 provided in some embodiments of the present application. Figure 2 for Figure 1 The cross-sectional view of AA in the figure, Figure 3 for Figure 2An enlarged view of point B in the figure. The embodiment of the present application provides a coating die 100, including a die body 10, an adjustment mechanism 20 and a first die lip 30. A receiving cavity 10A having a lip 10B is formed inside the die body 10, and the lip 10B is used for allowing the first slurry to flow out of the receiving cavity 10A. The adjustment mechanism 20 is arranged on one side of the lip 10B in the height direction Z of the die body 10, and the adjustment mechanism 20 is used to drive the die body 10 to elastically deform so as to adjust the size of the lip 10B in the height direction Z. The inner side of the lip 10B close to the adjustment mechanism 20 is recessed to form a first groove 111, and the first die lip 30 is accommodated in the first groove 111. Among them, the first die lip 30 is made of ceramic, and the first die lip 30 is connected to the bottom wall 111A of the first groove.

[0072] The die body 10 is a part of the coating die 100 for uniformly applying the coating slurry on the surface of the substrate. Exemplarily, the die body 10 is generally a metal part to have high strength and rigidity, thereby reducing the risk of deformation of the die body 10 when the pressure of the accommodating cavity 10A is too high.

[0073] The accommodating cavity 10A is a space in the die body 10 for accommodating the first slurry.

[0074] In some embodiments, the die body 10 has a feed port 10C communicating with the accommodating chamber 10A, and the slurry in the slurry tank enters the accommodating chamber 10A through the feed port 10C.

[0075] The lip 10B is a gap disposed on one side of the width direction X of the die body 10 and connected to the accommodating cavity 10A. Exemplarily, the lip 10B extends along the length direction Y of the die body 10. It can be understood that the length of the lip 10B in the length direction Y of the die body 10 should be adapted to the width of the first slurry coated on the substrate.

[0076] In some implementations, the adjustment mechanism 20 may include a driving member, which may be a driving unit such as a hydraulic cylinder, a pneumatic cylinder, or an electric telescopic rod. The driving end of the driving member is connected to one side of the die body 10 in the height direction Z, and the driving end is extended and retracted along the height direction Z to drive the die body 10 between the driving end and the lip 10B to elastically deform, thereby adjusting the size of the lip 10B in the height direction Z.

[0077] It can be understood that when the size of the lip 10B in the length direction Y of the die body 10 remains unchanged, the size of the lip 10B in the height direction Z is reduced, which will reduce the flow rate of the first slurry applied to the substrate through the lip 10B, thereby reducing the thickness of the active material on the electrode piece. When the size of the lip 10B in the height direction Z is increased, the flow rate of the first slurry applied to the substrate through the lip 10B is increased, thereby increasing the thickness of the active material on the electrode piece.

[0078] The inner side of the lip 10B close to the adjustment mechanism 20, that is, the inner side of the lip 10B that is elastically deformed by the adjustment mechanism 20. The inner side is recessed to form a first groove 111, and the first die lip 30 is accommodated in the first groove 111, that is, the first die lip 30 is arranged on the side of the lip 10B that is elastically deformed by the adjustment mechanism 20.

[0079] The first groove 111 can be formed synchronously with the die body 10 by an integral molding method such as casting. The first groove 111 can also be formed by machining the entire blank of the die body 10 by a machining method such as milling. Exemplarily, the first groove 111 extends along the length direction Y.

[0080] “The first die lip 30 is made of ceramic” can be understood as the entire first die lip 30 is made of ceramic material, or it can also be understood as the surface of the first die lip 30 having a portion for friction with the first slurry has a wear-resistant layer made of ceramic material. Exemplarily, the first die lip 30 extends along the length direction Y.

[0081] Ceramics are a widely used class of inorganic non-metallic materials, usually composed of metal oxides, nitrides, carbides, etc.

[0082] Exemplarily, the ceramic material may be a nano-ceramic material, a tungsten carbide alloy material, a high molecular ceramic polymer material, or the like.

[0083] The first die lip 30 and the bottom wall 111A of the first groove may be connected by welding, screwing or bonding.

[0084] Specifically, since the first die lip 30 is connected to the bottom wall 111A of the first groove, that is, the first die lip 30 is connected to the wall portion of the first groove 111 on the side close to the adjustment mechanism 20, when the adjustment mechanism 20 drives the die body 10 to elastically deform, the first die lip 30 can be driven by the connection between it and the first groove 111 to follow the deformation of the die body 10.

[0085] In this embodiment, the first die lip 30 is made of ceramic so that the hardness of the first die lip 30 is improved, thereby improving the wear resistance of the first die lip 30, thereby reducing the risk of the first slurry wearing the first die lip 30, thereby reducing the risk of the linearity of the lip 10B being reduced due to the wear of the first die lip 30 during the coating process, thereby improving the coating quality. At the same time, the inner side of the lip 10B close to the adjustment mechanism 20 is recessed to form a first groove 111, and because the first die lip 30 is connected to the bottom wall 111A of the first groove, that is, the first die lip 30 is connected to the wall of the first groove 111 close to the adjustment mechanism 20, when the adjustment mechanism 20 drives the die body 10 to elastically deform, the first die lip 30 can be driven by the connection between it and the first groove 111 to follow the deformation of the die body 10, thereby facilitating the adjustment of the size of the lip 10B in the height direction Z, reducing the risk of the linearity of the lip 10B being reduced due to the first die lip 30 not following the deformation of the die body 10, thereby improving the coating quality.

[0086] According to some embodiments of the present application, the first die lip 30 is welded and / or bonded to the bottom wall 111A of the first groove.

[0087] In some embodiments, the first die lip 30 and the bottom wall 111A of the first groove can be connected by brazing. After the brazing material is heated to the melting temperature, the liquid brazing material is used to fill the gap between the first die lip 30 and the bottom wall 111A of the first groove to connect the first die lip 30 and the bottom wall 111A of the first groove.

[0088] In some embodiments, the first die lip 30 and the bottom wall 111A of the first groove may be connected together by bonding with an adhesive.

[0089] In some embodiments, the first die lip 30 and the bottom wall 111A of the first groove may be connected by brazing, and then the gap remaining after brazing may be filled with adhesive.

[0090] Exemplarily, after the first die lip 30 is welded and / or bonded to the bottom wall 111A of the first groove, the side of the first die lip 30 facing away from the bottom wall 111A of the first groove needs to be polished to improve the linearity of the lip 10B with one side of the first die lip 30 .

[0091] In this embodiment, the first die lip 30 and the bottom wall 111A of the first groove are connected by welding and / or bonding, which can effectively improve the connection firmness and reliability between the first die lip 30 and the bottom wall 111A of the first groove, and help reduce the risk of the first die lip 30 and the bottom wall 111A of the first groove falling off from each other during use, thereby improving the reliability of the lip 10B.

[0092] Please refer to Figure 1 and Figure 2 , and please refer to Figure 3 According to some embodiments of the present application, the die body 10 has a first side 101 in its width direction X, and the lip 10B is located on the first side 101. The die body 10 has a second side 102 in the height direction Z, and the second side 102 is recessed to form a first adjustment groove 10D. Along the height direction Z, the first groove 111 and the first adjustment groove 10D are arranged in sequence. Along the width direction X, the first adjustment groove 10D has a first wall 101D and a second wall 102D that are oppositely arranged, and the first wall 101D is located between the second wall 102D and the accommodating cavity 10A. The adjustment mechanism 20 includes a first adjustment member 21, which is connected to the second wall 102D and is configured to drive the second wall 102D to elastically deform in a direction close to the first wall 101D.

[0093] The first side 101 is one side of the die body 10 in the width direction X. Exemplarily, the die body 10 has a first side 101 and a third side 103 that are relatively arranged in the width direction X. The feed port 10C is arranged on the third side 103 , and the lip 10B is arranged on the first side 101 .

[0094] The second side 102 is a side of the die body 10 close to the adjustment mechanism 20 in the height direction Z thereof.

[0095] The first adjustment groove 10D can be formed synchronously with the die body 10 by an integral molding method such as casting. The first adjustment groove 10D can also be formed by machining the entire blank of the die body 10 by a machining method such as milling. Exemplarily, the first adjustment groove 10D extends along the length direction Y.

[0096] It can be understood that along the height direction Z, the inner side and the second side 102 of the lip 10B having the first groove 111 are arranged in sequence, and the first groove 111 and the first adjustment groove 10D are arranged in sequence, so that the bottom wall of the first adjustment groove 10D and the bottom wall 111A of the first groove are respectively the opposite sides of the part of the die body 10 in the height direction Z.

[0097] The first wall 101D and the second wall 102D are two side walls of the first adjustment groove 10D that are opposite to each other in the width direction X.

[0098] In some implementations, the first adjusting member 21 may be a driving member, and the driving member may be a driving unit such as a hydraulic cylinder, a pneumatic cylinder, or an electric telescopic rod. The driving end of the first adjusting member 21 is connected to the second wall 102D, and the driving end is extended and retracted along the width direction X to drive the second wall 102D to elastically deform in a direction close to the first wall 101D or in a direction away from the bottom wall.

[0099] In some embodiments, please refer to Figure 2, the first wall 101D has a first mounting hole 10G extending to the third side 103 along the width direction X, and the second wall 102D has a second mounting hole 10F extending to the first side 101 along the width direction X, wherein the second mounting hole 10F is a threaded hole, the first adjusting member 21 is a bolt, the first adjusting member 21 is penetrated in the first mounting hole 10G, and is threadedly connected with the second mounting hole 10F, the nut of the first adjusting member 21 abuts against the third side 103 along the width direction X, and the first adjusting member 21 rotates along its axis to drive the second wall 102D to elastically deform in a direction close to the first wall 101D. It can be understood that the aperture of the first mounting hole 10G is greater than the diameter of the first adjusting member 21. Exemplarily, the first adjusting member 21 is a plurality of first adjusting members 21 spaced apart along the length direction Y.

[0100] Specifically, when the second wall 102D elastically deforms toward the first wall 101D, it drives the bottom wall of the first adjustment groove 10D to elastically deform toward the direction away from the lip 10B, thereby causing the bottom wall 111A of the first groove to elastically deform toward the other inner side away from the lip 10B, thereby driving the first die lip 30 to elastically deform toward the other inner side away from the lip 10B, thereby increasing the size of the lip 10B in the height direction Z, thereby increasing the flow rate of the first slurry, and thus increasing the coating thickness. When the second wall 102D elastically deforms in the direction away from the first wall 101D, it drives the bottom wall of the first adjustment groove 10D to elastically deform in the direction close to the lip 10B, so that the bottom wall 111A of the first groove elastically deforms in the direction close to the other inner side of the lip 10B, thereby driving the first die lip 30 to elastically deform in the direction close to the other inner side of the lip 10B, thereby reducing the size of the lip 10B in the height direction Z, thereby increasing the flow rate of the first slurry, thereby reducing the coating thickness.

[0101] In this embodiment, along the height direction Z, the first groove 111 and the first adjustment groove 10D are arranged in sequence, and along the width direction X, the first adjustment groove 10D has a first wall 101D and a second wall 102D that are arranged oppositely, and the first adjustment member 21 is connected to the second wall 102D, that is, the bottom wall of the first adjustment groove 10D and the bottom wall 111A of the first groove are respectively on the opposite sides of the die body 10 in the height direction Z, and the first adjustment member 21 is configured to drive the second wall 102D to move closer to the first wall 101D. 01D direction elastically deforms, thereby driving the bottom wall of the first adjustment groove 10D connected to the second wall 102D to elastically deform in the direction away from the lip 10B, thereby driving the bottom wall 111A of the first groove to elastically deform in the direction away from the other side of the lip 10B, and further driving the first die lip 30 to elastically deform in the direction away from the other side of the lip 10B, thereby adjusting the size of the lip 10B in the height direction Z, so as to adjust the thickness of the first slurry leaving the accommodating cavity 10A from the lip 10B. The structure is simple and easy to implement.

[0102] Please refer to Figure 2 and Figure 3 According to some embodiments of the present application, along the width direction X, the first die lip 30 has a first surface 31 close to the accommodating cavity 10A, the first groove 111 has a third wall 111B close to the accommodating cavity 10A, and the first surface 31 is attached to the third wall 111B.

[0103] The first surface 31 is a surface of the first die lip 30 that is close to the accommodating cavity 10A along the width direction X when the first die lip 30 is disposed in the first groove 111. Exemplarily, the first surface 31 may be a plane or an arc surface.

[0104] The third wall 111B is a wall portion of the first groove 111 close to the accommodating cavity 10A in the width direction X. Exemplarily, the third wall 111B may be a plane or an arc surface adapted to the first surface 31 .

[0105] The first surface 31 is attached to the third wall 111B, which can be understood as the contact between the first surface 31 and the third wall 111B to provide a pressing force to each other. It can also be understood that the contact between the first surface 31 and the third wall 111B does not provide a pressing force to each other.

[0106] In some embodiments, a filler (such as a resin matrix, etc.) may be injected between the first surface 31 and the third wall 111B to fill the gap between the first surface 31 and the third wall 111B.

[0107] In some embodiments, the first surface 31 and the third wall 111B may be connected by welding and / or bonding.

[0108] In this embodiment, the first surface 31 is attached to the third wall 111B, and there is no gap between the first die lip 30 and the third wall 111B in the width direction X. Therefore, when the first slurry leaves the containing cavity 10A from the lip 10B, the flow rate of the first slurry is reduced due to the gap between the first die lip 30 and the third wall 111B in the width direction X. This reduces the risk of coating quality and improves the coating quality.

[0109] Please refer to Figure 2 and Figure 3 According to some embodiments of the present application, along the width direction X, the first surface 31 is located between the accommodating cavity 10A and the first wall 101D.

[0110] It can be understood that when the second wall 102D elastically deforms to drive the bottom wall of the first adjustment groove 10D to elastically deform, and then drives the die body 10 to elastically deform, the main elastic deformation range is concentrated in the portion of the die body 10 where the first adjustment groove 10D is provided. Along the width direction X, the first surface 31 is located between the accommodating cavity 10A and the first wall 101D, so that the first surface 31 is located in a region with less deformation or no deformation.

[0111] In the present embodiment, along the width direction X, the first surface 31 is located between the accommodating cavity 10A and the first wall 101D, and then when the first adjusting member 21 drives the bottom wall of the first adjusting groove 10D connected to the second wall 102D to elastically deform in a direction away from the lip 10B, thereby driving the bottom wall 111A of the first groove to elastically deform in a direction away from the other side of the lip 10B, and driving the first die lip 30 to elastically deform in a direction away from the other side of the lip 10B, the first surface 31 is located in an area with less deformation or no deformation, thereby reducing the risk of a gap between the first surface 31 and the third wall 111B due to deformation of the first surface 31, thereby causing flow rate disturbance of the first slurry, thereby improving the coating quality.

[0112] Please refer to Figure 3 According to some embodiments of the present application, the dimension of the first die lip 30 in the height direction Z is H, satisfying 3mm≤H≤8mm.

[0113] The dimension of the first die lip 30 in the height direction Z is the thickness of the first die lip 30. It can be understood that, due to the large deformation of the ceramic during the firing process, in order to improve the precision of the first die lip 30, the first die lip 30 needs to be polished after firing so that its thickness meets the requirements.

[0114] H can be any point value among 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, etc., or a range value between any two of them.

[0115] In this embodiment, when H≥3mm, on the one hand, the first die lip 30 has a certain strength, reducing the risk of cracking when the first die lip 30 is elastically deformed, and on the other hand, the volume of the first die lip 30 that needs to be cut during processing is reduced, reducing the processing difficulty of the first die lip 30 and reducing the processing cost. When H≤8mm, the first die lip 30 is easy to follow the elastic deformation of the bottom wall 111A of the first groove, reducing the risk of cracking at the connection between the first die lip 30 and the bottom wall 111A of the first groove when the die body 10 is elastically deformed. Therefore, when 3mm≤H≤8mm, the first die lip 30 has a certain strength and is not easy to crack when it is elastically deformed, and is also easy to process. At the same time, it is easy to follow the elastic deformation of the bottom wall 111A of the first groove, thereby reducing the risk of cracking at the connection between the first die lip 30 and the bottom wall 111A of the first groove when the die body 10 is elastically deformed.

[0116] Please refer to Figure 4 , Figure 4 The structure explosion diagram of the coating die 100 provided in some embodiments of the present application. According to some embodiments of the present application, the first groove 111 penetrates the die body 10 along the length direction Y of the die body 10 .

[0117] In this embodiment, the first groove 111 penetrates the die body 10 along the length direction Y of the die body 10, so that both ends of the first groove 111 in the length direction Y are open structures, which is convenient for applying external force to the first die lip 30 through the two ends of the first groove 111 in the length direction Y when disassembling and replacing the first die lip 30, thereby facilitating the disassembly and replacement of the first die lip 30.

[0118] Please refer to Figure 4 According to some embodiments of the present application, the die body 10 has a first side 101 in the width direction X thereof, and the lip 10B is located on the first side 101 . The first groove 111 extends along the width direction X to the first side 101 .

[0119] In this embodiment, the first groove 111 extends to the first side 101 along the width direction X, so that one side of the first groove 111 in the width direction X is an open structure, which is convenient for applying external force to the first die lip 30 through the one side of the first groove 111 in the width direction X when disassembling and replacing the first die lip 30, thereby facilitating the disassembly and replacement of the first die lip 30.

[0120] Please refer to Figure 3 and 4 According to some embodiments of the present application, the coating die head 100 further includes a second die lip 40. The lip 10B is recessed away from the inner side of the adjustment mechanism 20 to form a second groove 121, and the second die lip 40 is accommodated in the second groove 121, and the second die lip 40 is made of ceramic.

[0121] The second groove 121 can be formed synchronously with the die body 10 by an integral molding method such as casting. The second groove 121 can also be formed by machining the entire blank of the die body 10 by a machining method such as milling. Exemplarily, the second groove 121 extends along the length direction Y.

[0122] In some embodiments, the second groove 121 penetrates the die body 10 along the length direction Y of the die body 10 .

[0123] In some embodiments, the second groove 121 extends along the width direction X to the first side 101 .

[0124] “The second die lip 40 is made of ceramic” can be understood as the entire second die lip 40 is made of ceramic material, or it can also be understood as the surface of the second die lip 40 having a portion for friction with the first slurry has a wear-resistant layer made of ceramic material. Exemplarily, the second die lip 40 extends along the length direction Y.

[0125] Exemplarily, the second die lip 40 and the second groove 121 may be connected by welding, screwing or bonding.

[0126] In some embodiments, along the width direction X, the second die lip 40 has a second surface 41 close to the accommodating cavity 10A, and the second surface 41 is attached to the side wall of the second groove 121 close to the accommodating cavity 10A.

[0127] In the present embodiment, the second die lip 40 is made of ceramic so that the hardness of the second die lip 40 is improved, thereby improving the wear resistance of the second die lip 40, thereby reducing the risk of the first slurry wearing the second die lip 40, thereby reducing the risk of reduced linearity on the other side of the lip 10B due to wear of the second die lip 40 during the coating process, thereby improving the coating quality.

[0128] Please refer to Figure 3 According to some embodiments of the present application, the inner side of the lip 10B away from the adjustment mechanism 20 is recessed to form a second adjustment groove 10E, and along the width direction X of the die body 10, the second adjustment groove 10E is located between the accommodating cavity 10A and the second groove 121. The second adjustment member 50 is adjustable in the height direction Z and is disposed in the second adjustment groove 10E. The second adjustment member 50 protrudes from the second adjustment groove 10E in the height direction Z to adjust the size of the lip 10B in the height direction Z.

[0129] The second adjustment groove 10E can be formed synchronously with the die body 10 by an integral molding method such as casting. The second adjustment groove 10E can also be formed by machining the entire blank of the die body 10 by a machining method such as milling. For example, the second adjustment groove 10E extends along the length direction Y.

[0130] The second adjusting member 50 is a sliding block that can slide in the second adjusting groove 10E.

[0131] In some embodiments, reference Figure 3 The bottom wall of the second adjustment groove 10E has a third mounting hole 10H that penetrates the die body 10 along the height direction Z. Part of the second adjustment member 50 passes through the third mounting hole 10H and is located outside the die body 10. The second adjustment member 50 is adjusted through this part to protrude from the second adjustment groove 10E along the height direction Z to adjust the size of the lip 10B in the height direction Z.

[0132] In this embodiment, the second adjusting member 50 is protruded out of the second adjusting groove 10E along the height direction Z to adjust the size of the lip 10B in the height direction Z, thereby adjusting the flow rate of the first slurry to adjust the coating thickness of the first slurry. The structure is simple and easy to implement.

[0133] Please refer to Figure 2 and Figure 3 , and please refer to Figure 4 According to some embodiments of the present application, the die body 10 includes a first die 11 and a second die 12 stacked in a height direction Z, the first die 11 and the second die 12 enclose a receiving cavity 10A, and a first groove 111 is provided on a side of the first die 11 facing the second die 12. The coating die 100 further includes a gasket 60, which is located between the first die 11 and the second die 12 in the height direction Z, and the gasket 60 is recessed on one side of the die body 10 in the width direction X to form a notch 61, and the notch 61 and the side opposite to the first die 11 and the second die 12 enclose a lip 10B.

[0134] The first die 11 and the second die 12 are main parts of the die body 10 .

[0135] It can be understood that the first die 11 and the second die 12 are generally metal parts to have higher strength and rigidity, thereby reducing the risk of deformation of the die body 10 when the pressure in the accommodating cavity 10A is too high.

[0136] Exemplarily, the first die head 11 and the second die head 12 may be connected by screws, or the first die head 11 and the second die head 12 may be connected by snaps, or the first die head 11 and the second die head 12 may be clamped by a fixture.

[0137] The first die 11 and the second die 12 enclose a holding cavity 10A for holding the first slurry, which can be understood as the first die 11 and the second die 12 enclose opposite sides to form the holding cavity 10A. Exemplarily, the side of one of the first die 11 and the second die 12 facing the other is recessed to form a groove, and the groove and the side of the other facing the groove enclose the holding cavity 10A.

[0138] If the groove is disposed on the side of the first die head 11 facing the second die head 12, the groove and the side of the second die head 12 facing the first die head 11 together form the accommodating cavity 10A. If the groove is disposed on the side of the second die head 12 facing the first die head 11, the groove and the side of the first die head 11 facing the second die head 12 together form the accommodating cavity 10A.

[0139] In some embodiments, the first groove 111 is disposed on the side of the first die 11 facing the second die 12, the side of the first die 11 away from the second die 12 along the height direction Z is the second side 102, the second side 102 is recessed to form a first adjustment groove 10D, and the first groove 111 and the first adjustment groove 10D are arranged in sequence along the height direction Z. The second groove 121 and the second adjustment groove 10E are disposed on the side of the second die 12 facing the first die 11, and the second groove 121 and the second adjustment groove 10E are arranged in sequence along the width direction X.

[0140] By setting the die body 10 as a split structure of the first die 11 and the second die 12, on the one hand, when dry slurry that is not easily washed away by the cleaning liquid appears in the accommodating cavity 10A, the die body 10 is designed to be split, which is more conducive to cleaning the dry slurry that is not easily washed away by the cleaning liquid in the accommodating cavity 10A by disassembling the first die 11 and the second die 12. On the other hand, the structural grooves such as the first groove 111 and the second groove 121 in the split die body 10 are easier to manufacture than the integrated die body 10, so the manufacturing cost of the coating die 100 can also be reduced.

[0141] The gasket 60 is a member provided between the first die 11 and the second die 12 to form the lip 10B between the first die 11 and the second die 12 .

[0142] For example, the notch 61 can be made simultaneously with the gasket 60 by an integral molding method such as casting. The notch 61 can also be made by machining the entire blank of the gasket 60 by a machining method such as milling.

[0143] It can be understood that the length of the notch 61 in the length direction Y should be adapted to the width of the first slurry coated on the substrate.

[0144] In this embodiment, the gasket 60 is arranged between the first die head 11 and the second die head 12 in the height direction Z so that there is a gap between the first die head 11 and the second die head 12, and the notch 61 of the gasket 60 is enclosed with the opposite sides of the first die head 11 and the second die head 12 to form a lip 10B, and the accommodating cavity 10A and the lip 10B are connected through the notch 61, so the structure is simple and easy to implement.

[0145] Please refer to Figure 4 and Figure 5 , Figure 5 for Figure 4 Enlarged view at C in the middle. According to some embodiments of the present application, the gasket 60 has a third surface 62 facing the first die 11 and a fourth surface 63 facing the second die 12 in the height direction Z, the third surface 62 is recessed to form a third groove 62A, the fourth surface 63 is recessed to form a fourth groove 63A, the third groove 62A and the fourth groove 63A both extend along the width direction X, one end of the third groove 62A is connected to one end of the fourth groove 63A, and the third groove 62A and the fourth groove 63A are enclosed with the sides opposite to the first die 11 and the second die 12 to form a flow channel for accommodating the second slurry.

[0146] The third surface 62 is the surface of the gasket 60 that fits with the first mold body after being clamped by the first mold body and the second mold body along the height direction Z. The fourth surface 63 is the surface of the gasket 60 that fits with the second mold body after being clamped by the first mold body and the second mold body along the height direction Z.

[0147] The third groove 62A and the fourth groove 63A can be formed simultaneously with the gasket 60 by an integral molding method such as casting. The third groove 62A and the fourth groove 63A can also be formed by machining the entire blank of the gasket 60 by a machining method such as milling.

[0148] In some embodiments, the third groove 62A and the fourth groove 63A both extend along the width direction X, and the orthographic projection of the third groove 62A and the orthographic projection of the fourth groove 63A on a plane perpendicular to the height direction Z partially overlap, and the overlapping portion passes through the gasket 60 to connect the third groove 62A and the fourth groove 63A.

[0149] In some embodiments, the fourth surface 63 is recessed to form an avoidance groove 64 corresponding to the second adjusting member 50, and a portion of the second adjusting member 50 protrudes from the second adjusting groove 10E and is located in the avoidance groove 64. On a plane perpendicular to the height direction Z, the orthographic projection of the avoidance groove 64 partially overlaps with the orthographic projection of the third groove 62A, and does not overlap with the orthographic projection of the fourth groove 63A.

[0150] In this embodiment, the third groove 62A and the fourth groove 63A are enclosed with the sides opposite to the first die head 11 and the second die head 12 to form a flow channel for accommodating the second slurry, so that part of the flow channel is located on the side of the gasket 60 close to the first die head 11, and the other part of the flow channel is located on the side of the gasket 60 close to the second die head 12, so that the flow channel can avoid the gap between the gasket 60 and the first die head 11 and the second die head 12 caused by the structural parts (such as the second adjusting member 50) on the first die head 11 and the second die head 12, thereby reducing the risk of the second slurry mixing with the first slurry from the inlet lip 10B due to the gap between the gasket 60 and the first die head 11 and the second die head 12.

[0151] Please refer to Figure 4 and Figure 5 According to some embodiments of the present application, the first groove 111 is located on the third surface 62, the first die lip 30 has a first surface 31 close to the accommodating cavity 10A in the width direction X, the first groove 111 has a third wall 111B close to the accommodating cavity 10A in the width direction X, and the first surface 31 is attached to the third wall 111B. On a plane perpendicular to the height direction Z, the orthographic projection of the first surface 31 overlaps with the orthographic projection of the fourth groove 63A.

[0152] In this embodiment, on a plane perpendicular to the height direction Z, the orthographic projection of the first surface 31 overlaps with the orthographic projection of the fourth groove 63A, so that when the second slurry flows through the joint of the first surface 31 and the third wall 111B in the flow channel, the gasket 60 can be located between the second slurry and the joint of the first surface 31 and the third wall 111B in the height direction Z, thereby reducing the risk of the second slurry flowing from the joint of the first surface 31 and the third wall 111B into the lip 10B and mixing with the first slurry.

[0153] The embodiment of the present application also provides a coating device, including the coating die head 100 mentioned above.

[0154] According to some embodiments of the present application, referring to Figure 1-Figure 5As shown, the embodiment of the present application provides a coating die 100, including a die body 10, an adjustment mechanism 20 and a first die lip 30. A receiving cavity 10A having a lip 10B is formed inside the die body 10, and the lip 10B is used for allowing the first slurry to flow out of the receiving cavity 10A. The adjustment mechanism 20 is arranged on one side of the lip 10B in the height direction Z of the die body 10, and the adjustment mechanism 20 is used to drive the die body 10 to elastically deform to adjust the size of the lip 10B in the height direction Z. The inner side of the lip 10B close to the adjustment mechanism 20 is recessed to form a first groove 111, and the first die lip 30 is accommodated in the first groove 111. Among them, the first die lip 30 is made of ceramic, and the first die lip 30 is connected to the bottom wall 111A of the first groove. The first die lip 30 is welded and / or bonded to the bottom wall 111A of the first groove. The die body 10 has a first side 101 in its width direction X, and the lip 10B is located on the first side 101. The die body 10 has a second side 102 in the height direction Z, and the second side 102 is recessed to form a first adjustment groove 10D. The first groove 111 and the first adjustment groove 10D are arranged in sequence along the height direction Z. Along the width direction X, the first adjustment groove 10D has a first wall 101D and a second wall 102D arranged opposite to each other, and the first wall 101D is located between the second wall 102D and the accommodating cavity 10A. The adjustment mechanism 20 includes a first adjustment member 21, which is connected to the second wall 102D and is configured to drive the second wall 102D to elastically deform in a direction close to the first wall 101D.

[0155] Along the width direction X, the first die lip 30 has a first surface 31 close to the accommodating cavity 10A, the first groove 111 has a third wall 111B close to the accommodating cavity 10A, the first surface 31 is attached to the third wall 111B, and the first surface 31 is located between the accommodating cavity 10A and the first wall 101D.

[0156] The dimension of the first die lip 30 in the height direction Z is H, which satisfies 3 mm ≤ H ≤ 8 mm.

[0157] The first groove 111 penetrates the die body 10 along the length direction Y of the die body 10 , and extends along the width direction X to the first side 101 .

[0158] The coating die 100 further includes a second die lip 40. The lip 10B is recessed away from the inner side of the adjustment mechanism 20 to form a second groove 121, and the second die lip 40 is accommodated in the second groove 121, and the second die lip 40 is made of ceramic. The lip 10B is recessed away from the inner side of the adjustment mechanism 20 to form a second adjustment groove 10E, and along the width direction X of the die body 10, the second adjustment groove 10E is located between the accommodating cavity 10A and the second groove 121. The second adjustment member 50 is adjustable in the second adjustment groove 10E along the height direction Z, and the second adjustment member 50 protrudes from the second adjustment groove 10E along the height direction Z to adjust the size of the lip 10B in the height direction Z. The die body 10 includes a first die 11 and a second die 12 stacked along the height direction Z, the first die 11 and the second die 12 enclose the accommodating cavity 10A, and the first groove 111 is arranged on the side of the first die 11 facing the second die 12. The coating die 100 further includes a gasket 60, which is located between the first die 11 and the second die 12 along the height direction Z. The gasket 60 is recessed on one side of the die body 10 in the width direction X to form a notch 61, and the notch 61 and the side opposite to the first die 11 and the second die 12 are enclosed to form a lip 10B. The gasket 60 has a third surface 62 facing the first die 11 and a fourth surface 63 facing the second die 12 in the height direction Z, the third surface 62 is recessed to form a third groove 62A, and the fourth surface 63 is recessed to form a fourth groove 63A. The third groove 62A and the fourth groove 63A both extend along the width direction X, one end of the third groove 62A is connected to one end of the fourth groove 63A, and the third groove 62A and the fourth groove 63A are enclosed with the side opposite to the first die 11 and the second die 12 to form a flow channel for accommodating the second slurry. The first groove 111 is located on the third surface 62, the first die lip 30 has a first surface 31 close to the accommodating cavity 10A in the width direction X, the first groove 111 has a third wall 111B close to the accommodating cavity 10A in the width direction X, and the first surface 31 is attached to the third wall 111B. On a plane perpendicular to the height direction Z, the orthographic projection of the first surface 31 overlaps with the orthographic projection of the fourth groove 63A.

[0159] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0160] The above embodiments are only used to illustrate the technical solution of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coating die head, characterized in that: include: The die body has a receiving cavity with a lip formed inside, and the lip is used for allowing the first slurry to flow out of the receiving cavity; An adjusting mechanism is arranged on one side of the lip in the height direction of the die body, and the adjusting mechanism is used to drive the die body to elastically deform so as to adjust the size of the lip in the height direction; a first die lip, wherein the lip is concave near the inner side of the adjusting mechanism to form a first groove, and the first die lip is accommodated in the first groove; Wherein, the first die lip is made of ceramic, and the first die lip is connected to the bottom wall of the first groove.

2. The coating die head according to claim 1, characterized in that The first die lip is welded and / or bonded to the bottom wall of the first groove.

3. The coating die head according to claim 1, characterized in that The die body has a first side in the width direction thereof, and the lip is located on the first side; The die body has a second side in the height direction, the second side is recessed to form a first adjustment groove, and along the height direction, the first groove and the first adjustment groove are arranged in sequence; Along the width direction, the first adjustment groove has a first wall and a second wall that are oppositely arranged, and the first wall is located between the second wall and the accommodating cavity; The adjustment mechanism includes a first adjustment member, which is connected to the second wall and is configured to drive the second wall to elastically deform in a direction close to the first wall.

4. The coating die head according to claim 3, characterized in that Along the width direction, the first die lip has a first surface close to the accommodating cavity, the first groove has a third wall close to the accommodating cavity, and the first surface is attached to the third wall.

5. The coating die head according to claim 4, characterized in that Along the width direction, the first surface is located between the accommodating cavity and the first wall.

6. The coating die head according to claim 1, characterized in that The dimension of the first die lip in the height direction is H, which satisfies 3mm≤H≤8mm.

7. The coating die head according to claim 1, characterized in that The first groove penetrates the die body along the length direction of the die body.

8. The coating die head according to claim 1, characterized in that The die body has a first side in the width direction thereof, and the lip is located on the first side; The first groove extends along the width direction to the first side.

9. The coating die head according to claim 1, characterized in that: The coating die also includes: The second die lip is recessed away from the inner side of the adjusting mechanism to form a second groove. The second die lip is accommodated in the second groove, and the second die lip is made of ceramic.

10. The coating die head according to claim 9, characterized in that: The inner side of the lip away from the adjustment mechanism is recessed to form a second adjustment groove, and along the width direction of the die body, the second adjustment groove is located between the accommodating cavity and the second groove; The second adjusting member is adjustably arranged in the second adjusting groove along the height direction, and the second adjusting member protrudes from the second adjusting groove along the height direction to adjust the size of the lip in the height direction.

11. The coating die head according to claim 1, characterized in that: The die body comprises a first die and a second die stacked in the height direction, the first die and the second die together form the accommodating cavity, and the first groove is arranged on a side of the first die facing the second die; The coating die also includes a gasket, which is located between the first die and the second die along the height direction. The gasket is recessed on one side of the die body in the width direction to form a notch, and the notch and the opposite sides of the first die and the second die are combined to form the lip.

12. The coating die head according to claim 11, characterized in that The gasket has a third surface facing the first die head and a fourth surface facing the second die head in the height direction, the third surface is recessed to form a third groove, the fourth surface is recessed to form a fourth groove, the third groove and the fourth groove both extend along the width direction, one end of the third groove is connected to one end of the fourth groove, and the third groove and the fourth groove are enclosed with the sides opposite to the first die head and the second die head to form a flow channel for accommodating the second slurry.

13. The coating die head according to claim 12, characterized in that: The first groove is located on the third surface, the first die lip has a first surface close to the accommodating cavity in the width direction, the first groove has a third wall close to the accommodating cavity in the width direction, and the first surface is attached to the third wall; On a plane perpendicular to the height direction, an orthographic projection of the first surface overlaps with an orthographic projection of the fourth groove.

14. A coating device, characterized in that: The coating die comprises the coating die head according to any one of claims 1 to 13.

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