Coating die and coating equipment

Abstract

This application provides a coating die and coating equipment, relating to the field of battery technology. When using the coating die, the slurry enters the main material chamber through the inlet, then enters the secondary material chamber through a notch, and then flows out through the notch for coating. By setting at least one main separator to divide the main opening into multiple main material chambers and setting multiple inlets, independent feeding is achieved for each main material chamber. This reduces the flow pressure difference between different positions of the slurry in the main opening and improves the flow velocity consistency between different positions of the slurry in the main opening. By setting at least one secondary separator to divide the secondary opening into multiple secondary material chambers, each secondary material chamber is connected to a main material chamber through a notch. This reduces the flow pressure difference between different positions of the slurry in the secondary opening and improves the flow velocity consistency between different positions of the slurry in the secondary opening.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a coating die and coating equipment. Background Technology

[0002] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] In the production process of battery cells, slurry is applied to the surface of the current collector through a coating die. In related technologies, the coating die is provided with a main opening and a secondary opening. After the slurry enters the main opening, it spreads from the middle to both ends until it fills the main opening and then flows into the secondary opening. Due to the large flow pressure difference between the slurry at different positions in the cavity, the flow rate of the slurry is inconsistent, which is not conducive to the uniformity of the coating surface density. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a coating die and coating equipment, which aims to solve the technical problem of how to improve the uniformity of coating surface density.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows: In a first aspect, embodiments of this application provide a coating die head, comprising: a first die head; a second die head disposed opposite to the first die head, the second die head having a plurality of feed ports on its outer periphery, the second die head having a main opening and a secondary opening facing the first die head, the main opening being located between the feed ports and the secondary opening; a coating pad sandwiched between the first die head and the second die head, the coating pad having a plurality of notches at one end away from the feed ports; at least one main separator disposed within the main opening to divide the main opening into a plurality of main material cavities, each main material cavity communicating with one of the feed ports, the main separator being spaced apart from the feed ports, the main separator being sandwiched between the second die head and the coating pad; and at least one secondary separator disposed within the secondary opening to divide the secondary opening into a plurality of secondary material cavities, each secondary material cavity communicating with one of the main material cavities through one of the notches, the secondary separator being sandwiched between the second die head and the coating pad.

[0006] In some embodiments of the first aspect, the coating die head further includes an adjusting screw, and the second die head has a first groove on the side facing away from the first die head. The first groove and the notch are disposed opposite to each other. The first groove is located on the side of the second die head away from the feed inlet. The first groove has a first groove sidewall and a second groove sidewall disposed opposite to each other. The second groove sidewall is located on the side of the first groove sidewall facing away from the feed inlet. A portion of the adjusting screw passes through the first groove sidewall and abuts against the second groove sidewall.

[0007] In some embodiments of the first aspect, the coating die head further includes a first die lip and a second die lip, the first die lip being connected to the first die head, the second die lip being connected to the side of the second die head away from the feed inlet, the first die lip and the second die lip being disposed opposite to each other, the coating pad being sandwiched between the first die lip and the second die lip, the coating pad, the first die lip and the second die lip forming a lip opening, the plurality of notches communicating with the lip opening, and the first groove being located between the feed inlet and the lip opening.

[0008] In some embodiments of the first aspect, the coating die head further includes a torsion nut located on the same side of the second die head as the feed inlet, and the torsion nut is fixedly connected to the adjusting screw.

[0009] In some embodiments of the first aspect, both the number of torsion nuts and the number of adjusting screws are multiple, with the multiple adjusting screws spaced apart, and each adjusting screw corresponding to one torsion nut.

[0010] In some embodiments of the first aspect, the coating die further includes a first elastic sealing layer sandwiched between the main separator and the coating gasket; and / or, the coating die further includes a second elastic sealing layer sandwiched between the secondary separator and the coating gasket.

[0011] In some embodiments of the first aspect, the coating die further includes a first elastic sealing ring, which is sleeved on the outer periphery of the main separator and abuts against the second die and the coating gasket respectively; and / or, the coating die further includes a second elastic sealing ring, which is sleeved on the outer periphery of the sub-separator and abuts against the second die and the coating gasket respectively.

[0012] In some embodiments of the first aspect, the main open cavity has a first arcuate cavity wall, and the main partition includes a first arcuate surface abutting against the first arcuate cavity wall; and / or, the secondary open cavity has a second arcuate cavity wall, and the secondary partition includes a second arcuate surface abutting against the second arcuate cavity wall.

[0013] In some embodiments of the first aspect, the coating pad includes a main body and a plurality of extensions, each extension being connected to the side of the main body away from the feed inlet, the extensions being spaced apart, the main body and two adjacent extensions forming a notch, the main body being sandwiched between the first die head and the second die head, the extensions being sandwiched between the first die head and the second die head, the main separator and the sub-separator being disposed opposite each other, each main separator being sandwiched between the second die head and one extension, and each sub-separator being sandwiched between the second die head and one extension.

[0014] In some embodiments of the first aspect, the coating die head further includes a plurality of lifting rods and a plurality of adjusting blocks, each of the adjusting blocks being fixedly connected to one of the lifting rods, the lifting rods passing through the first die head and being slidably connected to the first die head, the first die head having a second groove on one side facing the second die head, the plurality of notches communicating with the second groove, and the plurality of adjusting blocks being arranged in the second groove.

[0015] In some embodiments of the first aspect, there are multiple main separators and multiple sub-separators, with the multiple main separators spaced apart and the multiple sub-separators spaced apart, and each main separator is positioned opposite to one sub-separator.

[0016] Secondly, embodiments of this application provide a coating apparatus, including the coating die head described in any of the embodiments of the first aspect above.

[0017] The beneficial effects of this application are as follows: When using the coating die head provided in this application, the slurry enters the main material chamber through the inlet, then enters the secondary material chamber through a notch, and finally flows out through the notch for coating. By setting at least one main separator to divide the main opening into multiple main material chambers and setting multiple inlets, each main material chamber can be fed independently. This reduces the flow pressure difference between different positions of the slurry in the main opening and improves the flow velocity consistency of the slurry in different positions of the main opening, thereby helping to improve the uniformity of coating surface density. By setting at least one secondary separator to divide the secondary opening into multiple secondary material chambers, each secondary material chamber is connected to a main material chamber through a notch. This reduces the flow pressure difference between different positions of the slurry in the secondary opening and improves the flow velocity consistency of the slurry in different positions of the secondary opening, thereby helping to further improve the uniformity of coating surface density. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This paper shows a schematic diagram of the coating die head from one perspective in an embodiment of this application. Figure 2 This paper shows a schematic diagram of the coating die head from another perspective in an embodiment of this application. Figure 3 It shows Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4 It shows Figure 2 Schematic diagram of the cross-sectional structure at point BB; Figure 5 It shows Figure 2 A schematic diagram of the cross-sectional structure at the CC section; Figure 6 This shows another perspective structural schematic diagram of the coating die head in an embodiment of this application; Figure 7 It shows Figure 6 A schematic diagram of the decomposed structure; Figure 8 It shows when Figure 7 A schematic diagram of the structure when the first mold head, first mold lip, lifting rod, and adjusting pressure block are concealed; Figure 9 It shows Figure 8 A schematic diagram of the decomposed structure; Figure 10 It shows when Figure 8 A schematic diagram of the structure when the coated gasket, the first elastic sealing layer, and the second elastic sealing layer are concealed; Figure 11 It shows Figure 10 Schematic diagram of the main and secondary partition components; Figure 12 It shows when Figure 11 A schematic diagram showing the structure of the first and second elastic sealing rings is displayed. Figure 13 This illustration shows another perspective structural diagram of the coating die head in an embodiment of this application; Figure 14 It shows Figure 13 A schematic diagram of its decomposed structure.

[0020] Explanation of key component symbols: 100-Coating die head; 110-First die head; 111-Second groove; 120-Second die head; 121-Inlet; 122-Main opening cavity; 1221-Main material cavity; 1222-First arc-shaped cavity wall; 123-Secondary opening cavity; 1231-Secondary material cavity; 1232-Second arc-shaped cavity wall; 124-First groove; 1241-First groove sidewall; 1242-Second groove sidewall; 130-Coating gasket; 131-Notch; 132-Main body; 133-Extension; 1 40 - Main separator; 141 - First arc-shaped surface; 150 - Secondary separator; 151 - Second arc-shaped surface; 161 - Adjusting screw; 162 - Torsion nut; 163 - First elastic sealing layer; 164 - Second elastic sealing layer; 165 - First elastic sealing ring; 166 - Second elastic sealing ring; 171 - Lifting rod; 172 - Adjusting pressure block; 181 - First mold lip; 182 - Second mold lip; 183 - Lip; Z - First direction; Y - Second direction; X - Third direction. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Moreover, "above" or "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below" or "below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this application, the terms "first," "second," etc., are used to distinguish different objects and should not be construed as indicating or implying a specific order or hierarchy, or implicitly specifying the number of technical features indicated. Therefore, a feature marked "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, the term "multiple" means two or more, unless otherwise explicitly defined.

[0025] In the description of this application, unless otherwise explicitly specified, the term "connection" should be interpreted broadly. For example, it can refer to a non-detachable connection, a detachable connection, or a single-piece structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] In the description of this application, the term "and / or" can be understood to mean three possibilities. For example, A and / or B can represent: A alone; A and B simultaneously; and B alone. Additionally, the character " / " generally indicates an "or" relationship between the preceding and following objects.

[0027] In the description of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 80° to 90°, the two directions can be considered perpendicular; if the angle between two directions is 0° to 10°, the two directions can be considered parallel.

[0028] In the description of this application, the term "fixed connection" refers to two objects that are connected to each other and whose relative positions remain unchanged under normal use conditions, i.e., they will not easily undergo relative movement (e.g., relative rotation and relative movement); the term "rotational connection" refers to two objects that are connected to each other and can rotate relative to each other; and the term "sliding connection" refers to two objects that are connected to each other and can move relative to each other.

[0029] Electrode assembly is the core component of a battery cell. Electrode assembly includes a positive electrode, a negative electrode, and a separator, and is manufactured using a winding or stacking process. The separator is located between the positive and negative electrode. In the production process of electrode assembly, a slurry (positive electrode slurry or negative electrode slurry) is applied to the surface of the current collector through a coating die for subsequent electrode fabrication (positive electrode or negative electrode).

[0030] In related technologies, the coating die head is provided with a main opening and a secondary opening. After the slurry enters the main opening, it spreads from the middle to both ends until it fills the main opening and then flows into the secondary opening. Due to the large flow pressure difference between different positions of the slurry in the cavity (i.e., the flow pressure decreases from the middle to both ends of the cavity), the flow rate of the slurry is inconsistent, which is not conducive to the uniformity of the coating surface density.

[0031] like Figure 1 As shown, in order to solve the above-mentioned technical problems, the embodiments of this application provide a coating die head 100, which relates to the field of battery technology and is mainly used in coating equipment for coating slurry onto the surface of current collector.

[0032] like Figures 1 to 3 as well as Figures 8 to 10 As shown, the coating die head 100 provided in this embodiment includes: a first die head 110, a second die head 120, a coating pad 130, at least one main separator 140 and at least one secondary separator 150.

[0033] The second die head 120 is disposed opposite to the first die head 110. The outer periphery of the second die head 120 is provided with multiple feed inlets 121. The second die head 120 has a main opening 122 and a secondary opening 123 facing the first die head 110, with the main opening 122 located between the feed inlets 121 and the secondary opening 123. A coating gasket 130 is sandwiched between the first die head 110 and the second die head 120, with multiple notches 131 at one end of the coating gasket 130 away from the feed inlets 121. At least one main separator 140 is disposed within the main opening 122 to allow the main opening to... The oral cavity 122 is divided into multiple main material cavities 1221, each main material cavity 1221 is connected to a feed inlet 121, and a main separator 140 is spaced apart from the feed inlet 121. The main separator 140 is sandwiched between the second die head 120 and the coating pad 130. At least one secondary separator 150 is disposed in the secondary open oral cavity 123 to divide the secondary open oral cavity 123 into multiple secondary material cavities 1231. Each secondary material cavity 1231 is connected to a main material cavity 1221 through a notch 131. The secondary separator 150 is sandwiched between the second die head 120 and the coating pad 130.

[0034] It is understood that when using the coating die head 100 provided in this embodiment, the slurry enters the main material chamber 1221 through the feed inlet 121, then enters the auxiliary material chamber 1231 through the notch 131 from the main material chamber 1221, and then flows out through the notch 131 for coating. By setting at least one main separator 140 to divide the main opening 122 into multiple main material chambers 1221 and setting multiple feed inlets 121, independent feeding can be achieved for each main material chamber 1221. This reduces the flow pressure difference between the slurry at different positions in the main opening 122 and improves the flow velocity consistency between the slurry at different positions in the main opening 122, thereby helping to improve the uniformity of the coating surface density.

[0035] In addition, by setting at least one secondary separator 150 to divide the secondary opening 123 into multiple secondary material chambers 1231, each secondary material chamber 1231 is connected to a main material chamber 1221 through a notch 131. This reduces the flow pressure difference between the slurry at different positions in the secondary opening 123 and improves the flow velocity consistency between the slurry at different positions in the secondary opening 123, thereby helping to further improve the uniformity of the coating surface density.

[0036] It should be noted that when the first die head 110 and the coating pad 130 are not installed, the size of the main material cavity 1221 and the secondary material cavity 1231 can be adjusted by adjusting the position of the main separator 140 and the secondary separator 150, so as to achieve different coating widths.

[0037] like Figure 1 , Figure 2 and Figure 4As shown, in some embodiments, the coating die head 100 further includes an adjusting screw 161. The second die head 120 has a first groove 124 on the side facing away from the first die head 110. The first groove 124 and the notch 131 are arranged opposite to each other. The first groove 124 is located on the side of the second die head 120 away from the feed inlet 121. The first groove 124 has a first groove sidewall 1241 and a second groove sidewall 1242 arranged opposite to each other. The second groove sidewall 1242 is located on the side of the first groove sidewall 1241 facing away from the feed inlet 121. A portion of the adjusting screw 161 passes through the first groove sidewall 1241 and abuts against the second groove sidewall 1242.

[0038] Understandably, when the adjusting screw 161 is rotated to move it closer to the side wall 1242 of the second groove, the adjusting screw 161 deforms the part of the second die head 120 away from the feed port 121 by squeezing the side wall 1242 of the second groove. This causes the first die head 110 and the second die head 120 to fit more tightly with the coating pad 130, which helps to eliminate the gap between the first die head 110 (or the second die head 120) and the coating pad 130 due to long-term use. This reduces the risk of slurry leakage during high-speed coating and improves the coating yield.

[0039] like Figure 1 , Figure 2 and Figure 4 As shown, the coating die head 100 further includes a first die lip 181 and a second die lip 182. The first die lip 181 is connected to the first die head 110, and the second die lip 182 is connected to the side of the second die head 120 away from the feed port 121. The first die lip 181 and the second die lip 182 are arranged opposite to each other. A coating pad 130 is sandwiched between the first die lip 181 and the second die lip 182. The coating pad 130, the first die lip 181 and the second die lip 182 form a lip 183. Multiple notches 131 are all connected to the lip 183. The first groove 124 is located between the feed port 121 and the lip 183.

[0040] It is understood that when using the coating die head 100 provided in this embodiment, the slurry enters the main material chamber 1221 through the feed port 121, then enters the auxiliary material chamber 1231 from the main material chamber 1221 through the notch 131, and then flows out through the notch 131 and the lip 183 in sequence and is coated on the surface of the collector. After the above process is carried out for a long time, gaps may occur between the first die lip 181 and the coating pad 130, or between the second die head 120 and the coating pad 130, due to insufficient fit, and the slurry may easily leak from the gaps.

[0041] By setting the adjusting screw 161, when the adjusting screw 161 is rotated to move it closer to the side wall 1242 of the second groove, the adjusting screw 161 compresses the side wall 1242 of the second groove, causing the part of the second die head 120 away from the feed port 121 to deform. During the deformation process, the first die lip 181 and the second die lip 182 can fit more tightly with the coating pad 130, which helps to eliminate the above-mentioned gap, thereby reducing the risk of slurry leakage during high-speed coating and improving the coating yield.

[0042] like Figure 1 , Figure 2 and Figure 4 As shown, the coating die head 100 further includes a torsion nut 162, which is located on the same side of the second die head 120 as the feed inlet 121, and is fixedly connected to the adjusting screw 161.

[0043] It is understandable that by setting the torsion nut 162, it is easy to drive the adjusting screw 161 to rotate, thereby realizing the movement of the adjusting screw 161 under the action of the threaded engagement.

[0044] Furthermore, the coating die head 100 also includes a driver, which is connected to the torsion nut 162 and is used to drive the torsion nut 162 to rotate, thereby driving the adjusting screw 161 to rotate and realize the movement of the adjusting screw 161. The driver can be a rotary motor, drive motor, etc., and no specific limitation is made here.

[0045] Of course, in the above embodiment, the adjustment screw 161 can also be moved by manually turning the torsion nut 162 with a hand wrench.

[0046] like Figure 1 As shown, furthermore, there are multiple torsion nuts 162 and multiple adjusting screws 161, with the multiple adjusting screws 161 spaced apart, and each adjusting screw 161 corresponding to one torsion nut 162. This facilitates the compression of multiple parts of the second groove sidewall 1242, thereby helping to more accurately adjust the fit between the die head and die lip and the coating gasket 130.

[0047] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, the coating die 100 further includes a first elastic sealing layer 163, which is sandwiched between the main separator 140 and the coating gasket 130.

[0048] Understandably, the first elastic sealing layer 163 utilizes its own elastic deformation capability to fit tightly with the main separator 140 and the coating gasket 130. On the one hand, it can increase the friction force and restrict the movement of the main separator 140, thereby enhancing the stability of the main separator 140 in the main opening 122. On the other hand, it can play a sealing role, isolating the two adjacent main material cavities 1221 from each other, thereby reducing the adverse effects on the coating surface density.

[0049] like Figure 1 , Figure 2 and Figure 5 As shown, in some embodiments, the coating die 100 further includes a second elastic sealing layer 164, which is sandwiched between the sub-separator 150 and the coating gasket 130.

[0050] Understandably, the second elastic sealing layer 164 utilizes its own elastic deformation capability to fit tightly with the sub-separator 150 and the coating gasket 130. On the one hand, it can increase the friction force and restrict the movement of the sub-separator 150, thereby enhancing the stability of the sub-separator 150 in the sub-opening cavity 123. On the other hand, it can play a sealing role, isolating the two adjacent sub-material cavities 1231 from each other, thereby reducing the adverse effects on the coating surface density.

[0051] like Figure 6 as well as Figures 10 to 12 As shown, in some embodiments, the coating die 100 further includes a first elastic sealing ring 165, which is sleeved on the outer periphery of the main separator 140 and abuts against the second die 120 and the coating gasket 130 respectively.

[0052] Understandably, the first elastic sealing ring 165 utilizes its own elastic deformation capability to fit tightly with the main separator 140, the second die head 120, and the coating gasket 130. On the one hand, it can increase the friction force and restrict the movement of the main separator 140, thereby enhancing the stability of the main separator 140 in the main opening 122. On the other hand, it can play a better sealing role, better isolating the two adjacent main material cavities 1221 from each other, thereby reducing the adverse effects on the coating surface density.

[0053] like Figure 6 as well as Figures 10 to 12 As shown, in some embodiments, the coating die 100 further includes a second elastic sealing ring 166, which is sleeved on the outer periphery of the sub-separator 150 and abuts against the second die 120 and the coating gasket 130 respectively.

[0054] Understandably, the second elastic sealing ring 166 utilizes its own elastic deformation capability to fit tightly with the sub-separator 150, the second die head 120, and the coating gasket 130. On the one hand, it can increase the friction force and restrict the movement of the sub-separator 150, thereby enhancing the stability of the sub-separator 150 in the sub-opening cavity 123. On the other hand, it can play a better sealing role, better isolating the two adjacent sub-material cavities 1231 from each other, thereby reducing the adverse effects on the coating surface density.

[0055] Furthermore, the outer periphery of the main separator 140 is provided with a first annular groove, and at least a portion of the first elastic sealing ring 165 is located within the first annular groove. This enhances the stability and reliability of the first elastic sealing ring 165 while reducing the space occupied by the first elastic sealing ring 165. The outer periphery of the secondary separator 150 is provided with a second annular groove, and at least a portion of the second elastic sealing ring 166 is located within the second annular groove. This enhances the stability and reliability of the second elastic sealing ring 166 while reducing the space occupied by the second elastic sealing ring 166.

[0056] For example, the material of the elastic sealing layer / elastic sealing ring can be fluororubber, EPDM rubber, silicone, etc., without specific limitations.

[0057] like Figure 2 and Figure 5 As shown, in some embodiments, the main opening 122 has a first arcuate cavity wall 1222, and the main separator 140 includes a first arcuate surface 141 that abuts against the first arcuate cavity wall 1222. This increases the fit between the main separator 140 and the second die head 120, thus isolating adjacent main material cavities 1221 from each other.

[0058] like Figure 2 and Figure 5 As shown, in some embodiments, the secondary opening 123 has a second arcuate cavity wall 1232, and the secondary separator 150 includes a second arcuate surface 151 that abuts against the second arcuate cavity wall 1232. This increases the fit between the secondary separator 150 and the second die head 120, thus isolating adjacent secondary material cavities 1231 from each other.

[0059] It should be noted that when the coating die head 100 includes a first elastic sealing ring 165 and a second elastic sealing ring 166, the first elastic sealing ring 165 covers the first arc-shaped surface 141, and the second elastic sealing ring 166 covers the second arc-shaped surface 151.

[0060] like Figures 7 to 9As shown, in some embodiments, the coating pad 130 includes a main body 132 and a plurality of extensions 133. The plurality of extensions 133 are all connected to the side of the main body 132 away from the feed port 121. The plurality of extensions 133 are spaced apart. The main body 132 and two adjacent extensions 133 form a notch 131. The main body 132 is sandwiched between the first die head 110 and the second die head 120. The extensions 133 are sandwiched between the first die head 110 and the second die head 120. The main separator 140 and the secondary separator 150 are disposed opposite to each other. Each main separator 140 is sandwiched between the second die head 120 and an extension 133. Each secondary separator 150 is sandwiched between the second die head 120 and an extension 133.

[0061] Understandably, since the main separator 140 and the secondary separator 150 are arranged opposite to each other, with each main separator 140 sandwiched between the second die head 120 and an extension 133, and each secondary separator 150 sandwiched between the second die head 120 and an extension 133, the possibility of the main separator 140 and the secondary separator 150 being completely exposed to the notch 131 can be reduced, thus isolating two adjacent main material cavities 1221 from each other and two adjacent secondary material cavities 1231 from each other, thereby reducing the adverse effects on the coating surface density.

[0062] like Figure 6 , Figure 7 , Figure 13 and Figure 14 As shown, in some embodiments, the coating die head 100 further includes a plurality of lifting rods 171 and a plurality of adjusting blocks 172. Each adjusting block 172 is fixedly connected to a lifting rod 171. The lifting rod 171 passes through the first die head 110 and is slidably connected to the first die head 110. The first die head 110 has a second groove 111 on the side facing the second die head 120. A plurality of notches 131 are all connected to the second groove 111. A plurality of adjusting blocks 172 are arranged in the second groove 111.

[0063] Understandably, the adjusting block 172 can move under the action of the lifting rod 171, thereby acting on the slurry flowing through the notch 131 to adjust the weight, so as to evenly distribute the flow pressure of the slurry and help to further improve the uniformity of the coating surface density.

[0064] It should be noted that a micrometer or a linear motor can be connected to the lifting rod 171, thereby driving the lifting rod 171 to move relative to the first mold head 110.

[0065] like Figures 8 to 10As shown, in some embodiments, there are multiple main separators 140 and multiple secondary separators 150, with multiple main separators 140 spaced apart and multiple secondary separators 150 spaced apart, and each main separator 140 is positioned opposite to one secondary separator 150. This can separate at least two main material chambers 1221 and at least two secondary material chambers 1231, further reducing the flow pressure difference between slurries at different locations and making the coating effect more uniform.

[0066] It should be noted that when the coating die head 100 has a first direction Z, a second direction Y, and a third direction X that are perpendicular to each other, the second die head 120 and the first die head 110 are arranged opposite each other along the first direction Z, multiple feed ports 121 are located in the third direction X, and the main opening 122 is located between the feed port 121 and the secondary opening 123 along the third direction X; the coating pad 130 is provided with multiple notches 131 at one end away from the feed port 121 along the third direction X, multiple main separators 140 are spaced apart along the third direction X, and multiple secondary separators 150 are spaced apart along the third direction X; the first groove 124 and the notch 131 are arranged opposite each other along the first direction Z, and the first groove 124 is located between the feed port 121 and the lip 183 along the second direction Y; multiple extensions 133 are all connected to the side of the main body 132 away from the feed port 121.

[0067] To address the aforementioned technical problems, embodiments of this application also provide a coating device, including a body, a buffer tank, multiple feed pipes, and a coating die 100 as described in any of the above embodiments. The buffer tank is used to store slurry. The port of each feed pipe is connected to an inlet 121. The multiple feed pipes are all directly connected to the buffer tank, or the multiple feed pipes are all indirectly connected to the buffer tank through a main feed pipe. The second die 120 is fixedly connected to the body.

[0068] It is understood that since the coating equipment provided in this embodiment includes the coating die 100 in any of the above embodiments, it has all the beneficial effects of the coating die 100, which will not be described in detail here.

[0069] In the description of this application, the terms "some embodiments," "one embodiment," "example," "specific example," "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In the description of this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0070] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A coating die head, characterized in that, include: First mold head (110); The second mold head (120) is disposed opposite to the first mold head (110). The outer periphery of the second mold head (120) is provided with a plurality of feed ports (121). The second mold head (120) is provided with a main opening (122) and a secondary opening (123) facing the first mold head (110). The main opening (122) is located between the feed ports (121) and the secondary opening (123). A coating pad (130) is sandwiched between the first die head (110) and the second die head (120), and the coating pad (130) has a plurality of notches (131) at the end away from the feed port (121). At least one main partition (140) is disposed within the main opening (122) to divide the main opening (122) into a plurality of main material cavities (1221), each of the main material cavities (1221) being connected to a feed inlet (121), the main partition (140) being spaced apart from the feed inlet (121), and the main partition (140) being sandwiched between the second die head (120) and the coating pad (130); At least one secondary separator (150) is disposed within the secondary opening (123) to divide the secondary opening (123) into a plurality of secondary material cavities (1231), each of the secondary material cavities (1231) being connected to a primary material cavity (1221) through a notch (131), and the secondary separator (150) being sandwiched between the second die head (120) and the coating pad (130).

2. The coating die head according to claim 1, characterized in that, The coating die head also includes an adjusting screw (161). The second die head (120) has a first groove (124) on the side facing away from the first die head (110). The first groove (124) and the notch (131) are arranged opposite to each other. The first groove (124) is located on the side of the second die head (120) away from the feed port (121). The first groove (124) has a first groove sidewall (1241) and a second groove sidewall (1242) arranged opposite to each other. The second groove sidewall (1242) is located on the side of the first groove sidewall (1241) facing away from the feed port (121). A portion of the adjusting screw (161) passes through the first groove sidewall (1241) and abuts against the second groove sidewall (1242).

3. The coating die head according to claim 2, characterized in that, The coating die head further includes a first die lip (181) and a second die lip (182). The first die lip (181) is connected to the first die head (110), and the second die lip (182) is connected to the side of the second die head (120) away from the feed inlet (121). The first die lip (181) and the second die lip (182) are arranged opposite to each other. The coating pad (130) is sandwiched between the first die lip (181) and the second die lip (182). The coating pad (130), the first die lip (181) and the second die lip (182) form a lip opening (183). A plurality of notches (131) are connected to the lip opening (183). The first groove (124) is located between the feed inlet (121) and the lip opening (183).

4. The coating die head according to claim 2, characterized in that, The coating die head also includes a torsion nut (162), which is located on the same side of the second die head (120) as the feed inlet (121), and the torsion nut (162) is fixedly connected to the adjusting screw (161).

5. The coating die head according to claim 4, characterized in that, The number of torsion nuts (162) and the number of adjusting screws (161) are both multiple, and the multiple adjusting screws (161) are spaced apart, with each adjusting screw (161) corresponding to one torsion nut (162).

6. The coating die head according to claim 1, characterized in that, The coating die head also includes a first elastic sealing layer (163), which is sandwiched between the main separator (140) and the coating gasket (130); And / or, the coating die head further includes a second elastic sealing layer (164), which is sandwiched between the sub-separator (150) and the coating gasket (130).

7. The coating die head according to claim 1, characterized in that, The coating die head also includes a first elastic sealing ring (165), which is sleeved on the outer periphery of the main separator (140) and abuts against the second die head (120) and the coating gasket (130) respectively. And / or, the coating die head further includes a second elastic sealing ring (166), which is sleeved on the outer periphery of the sub-separator (150), and the second elastic sealing ring (166) abuts against the second die head (120) and the coating gasket (130) respectively.

8. The coating die head according to claim 1, characterized in that, The main open cavity (122) has a first arcuate cavity wall (1222), and the main partition (140) includes a first arcuate surface (141) that abuts against the first arcuate cavity wall (1222). And / or, the secondary open cavity (123) has a second arcuate cavity wall (1232), and the secondary partition (150) includes a second arcuate surface (151) that abuts against the second arcuate cavity wall (1232).

9. The coating die head according to any one of claims 1 to 8, characterized in that, The coating pad (130) includes a main body (132) and a plurality of extensions (133). The plurality of extensions (133) are all connected to the side of the main body (132) away from the feed inlet (121). The plurality of extensions (133) are spaced apart. The main body (132) and two adjacent extensions (133) form a notch (131). The main body (132) is sandwiched between the first die head (110) and the second die head. Between the heads (120), the extension (133) is sandwiched between the first mold head (110) and the second mold head (120), the main separator (140) and the sub separator (150) are arranged opposite to each other, each main separator (140) is sandwiched between the second mold head (120) and the extension (133), and each sub separator (150) is sandwiched between the second mold head (120) and the extension (133).

10. The coating die head according to any one of claims 1 to 8, characterized in that, The coating die head also includes multiple lifting rods (171) and multiple adjusting blocks (172). Each adjusting block (172) is fixedly connected to one of the lifting rods (171). The lifting rods (171) pass through the first die head (110) and are slidably connected to the first die head (110). The first die head (110) has a second groove (111) on the side facing the second die head (120). Multiple notches (131) are all connected to the second groove (111). Multiple adjusting blocks (172) are arranged in the second groove (111).

11. The coating die head according to any one of claims 1 to 8, characterized in that, The number of main separators (140) and the number of sub-separators (150) are both multiple. The multiple main separators (140) are spaced apart, and the multiple sub-separators (150) are spaced apart. Each main separator (140) is positioned opposite to one sub-separator (150).

12. A coating apparatus, characterized in that, It includes the coating die head according to any one of claims 1 to 11.

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