Roller coating device and solid-state battery manufacturing system
The roller coating device addresses the challenge of uniform electrode thickness by employing multiple coating portions at varying distances, enabling the production of non-standard electrodes with varied thicknesses and patterns.
Patent Information
- Application Number
- CN202420488520.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-13
AI Technical Summary
Existing electrode coating devices form uniform slurry layers, making it difficult to create electrodes with varying thicknesses or specific patterns on a single substrate, limiting the production of non-standard batteries.
A roller coating device with multiple coating portions at varying distances from the discharge port, allowing for the formation of coatings of different thicknesses and patterns on a single substrate by adjusting the distance and configuration of the coating parts.
Enables the production of diverse electrode thicknesses and patterns, meeting the requirements for non-standard electrodes and improving the versatility of battery manufacturing.
Smart Images
Figure CN222132408U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a roller coating device and a solid-state battery manufacturing system. Background Art
[0002] The slurry coated on the substrate by the existing electrode coating device is in the form of a complete flat plate, which makes it inconvenient to form positive / negative electrode slurry layers of different thicknesses on the same substrate, and it is even more impossible to form coating areas and blank areas on the same substrate according to a preset interval width. Therefore, it is impossible to produce non-standard electrodes and batteries. Utility Model Content
[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a roller coating device and a solid-state battery manufacturing system to form coatings of different thicknesses on the same substrate.
[0004] The purpose of the utility model is achieved through the following technical solutions:
[0005] A roller coating device comprises a silo and a coating roller, wherein the silo is used to contain a slurry to be coated, the silo is provided with a discharge port, the coating roller is installed at the discharge port and is rotatably connected to the silo; the coating roller comprises a plurality of coating portions, and at least two of the plurality of coating portions are at different distances from the discharge port.
[0006] In one embodiment, the plurality of coating portions are arranged along an axial direction of the coating roller, and the axial direction of the coating roller is perpendicular to a coating direction in which the coating roller moves relative to the substrate.
[0007] In one embodiment, the coating roller comprises at least three coating parts, and along the axial direction of the coating roller, the distance between the coating parts at both ends of the coating roller and the discharge port is less than or equal to the distance between the remaining coating parts and the discharge port.
[0008] In one embodiment, there is a gap between each of the coating portions and the discharge port.
[0009] In one embodiment, a scraper is provided on the silo at the discharge port, the distance between the coating portion and the discharge port is M, and the distance between the coating portion and the scraper is N, wherein M=N.
[0010] In one embodiment, there is a gap between each coating portion and the blade of the scraper.
[0011] In one embodiment, the distance between the discharge port and the coating portion is adjustable, and the distance between the coating portion closest to the discharge port and the discharge port is M', 0<M'≤2mm.
[0012] In one embodiment, the coating roller includes at least three coating parts, the coating part includes a raised area and a recessed area, the raised area and the recessed area are arranged alternately in sequence, the raised area is closer to the discharge port than the two adjacent recessed areas, and the recessed area is farther from the discharge port than the two adjacent raised areas.
[0013] In one embodiment, the distance between two adjacent raised areas or two adjacent recessed areas on the coating roller is Q, wherein 0 <Q≤1m。
[0014] In one embodiment, there are multiple raised areas, and each of the raised areas is at the same distance from the discharge port; and / or there are multiple recessed areas, and each of the recessed areas is at the same distance from the discharge port.
[0015] In one embodiment, the distance between the recessed area and the discharge port is M1, and the distance between the raised area and the discharge port is M2, wherein -1.25 mm ≤ M1 - M2 ≤ 1.25 mm.
[0016] The utility model also provides a solid-state battery manufacturing system, comprising the roller coating device as described above.
[0017] The beneficial effect of the utility model is that by arranging multiple coating parts at different distances from the discharge port on the coating roller, the coating roller can realize coating of different thicknesses on the same substrate by multiple coating parts during the rotating coating process, thereby solving the problem that the existing roller coating device is difficult to form coatings of different thicknesses on the same substrate, improving the diversity of electrode production, and being able to meet the production requirements of non-standard electrodes for coatings of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, 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 utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 It is a structural schematic diagram of a roller coating device according to an embodiment of the utility model;
[0020] Figure 2 yes Figure 1 A side view of the coating roller in FIG.
[0021] Figure 3 yes Figure 1 Schematic diagram of the decomposition structure in;
[0022] Figure 4 yes Figure 1A schematic diagram of the structure of the roller coating device during the coating process;
[0023] Figure 5 is a side view of a coating roller according to another embodiment of the present invention;
[0024] Figure 6 It is a partial cross-sectional view of a coating roller along the central axis of another embodiment of the utility model;
[0025] Figure 7 A schematic diagram of a solid-state battery 3D printing system.
[0026] In the figure: 1. roller coating device; 11. silo; 111. discharge port; 112. scraper; 113. flow blocking device; 12. coating roller; 121. coating part; 121A. raised area; 121B. recessed area; 122. heating resistor; 2. solvent volatilization device; 3. compaction device; 31. compaction upper part; 32. compaction lower part; 4. interface treatment device; 5. secondary roller coating device; 6. substrate; 7. coating; 71. raised coating; 72. recessed coating. DETAILED DESCRIPTION
[0027] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0029] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.
[0030] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.
[0031] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.
[0032] The utility model provides a roller coating device 1, such as Figures 1 to 4 As shown, it includes a silo 11 and a coating roller 12. The silo 11 is used to hold the slurry to be coated. The silo 11 is provided with a discharge port 111. The coating roller 12 is installed at the discharge port 111 and is rotatably connected to the silo 11. The coating roller 12 includes a plurality of coating parts 121, and at least two of the plurality of coating parts 121 are at different distances from the discharge port 111. Specifically, during the coating process, when the roller coating device 1 moves along the coating direction X1 for coating, the coating roller 12 rotates while moving along the coating direction X1 for coating. The direction of the rotation is the rotation direction S of the coating roller 12. The slurry to be coated contained in the silo 11 is discharged through the discharge port 111. After being discharged, the slurry contacts the coating roller 12. The coating part 121 is coated on the surface of the substrate 6 by the rotation of the coating roller 12, thereby forming a coating 7. Among them, the silo 11 can be set as a bucket-shaped structure, so that the slurry flows out of the discharge port 111 along the side wall of the silo that gradually shrinks from top to bottom, so as to reduce the residual amount of slurry in the silo 11. The utility model sets a plurality of coating parts 121 with different distances from the discharge port 111 on the coating roller 12, so that during the rotation coating process of the coating roller 12, the plurality of coating parts 121 can be coated on the same substrate 6 to form coatings 7 of different thicknesses, which solves the problem that the existing roller coating device 1 is difficult to form coatings 7 of different thicknesses on the same substrate 6, improves the diversity of electrode production, and can meet the production requirements of non-standard electrodes for coatings 7 of different thicknesses.
[0033] As an implementation method, Figure 1 , Figure 2 and Figure 4 As shown, a plurality of coating portions 121 are arranged along the axial direction L of the coating roller 12, and the axial direction L of the coating roller 12 is perpendicular to the coating direction X1 in which the coating roller 12 moves relative to the substrate 6, so that when the coating roller 12 rotates around its central axis, the coating 7 having a specific configuration can be continuously coated on the substrate 6. Of course, the coating portions 121 can also be arranged along any desired direction.
[0034] As an implementation method, Figure 5As shown, the coating roller 12 includes at least three coating parts 121. Along the axial direction of the coating roller 12, the distance between the coating parts 121 at both ends of the coating roller 12 and the discharge port 111 is less than or equal to the distance between the other coating parts 121 and the discharge port 111, that is, the diameter of the coating parts 121 at both ends of the coating roller 12 is greater than or equal to the diameter of the other coating parts 121. Of course, the distance between each coating part 121 and the discharge port 111 can also be reasonably arranged according to actual needs, and no further limitation is made here.
[0035] As an embodiment, at least one coating portion 121 is arranged in contact with the discharge port 111, and a blank area can be formed by coating with the coating portion 121; or there is a gap between each coating portion 121 and the discharge port 111, and by setting the size of the gap, a preset coating thickness is formed on the substrate 6, and by changing the size of the gap between each coating portion 121 and the discharge port 111, coatings 7 of different thicknesses can be formed on the same substrate 6.
[0036] As an implementation method, Figure 1 and Figure 3 As shown, a scraper 112 is provided at the discharge port 111 on the silo 11, and along the coating direction X1 of the coating roller 12, the scraper 112 is provided at the downstream side of the discharge port 111, the distance between the coating portion 121 and the discharge port 111 is M, and the distance between the coating portion 121 and the scraper 112 is N, wherein M=N. The scraper 112 is used to scrape off a portion of the slurry, so that the formed coating 7 is more uniform.
[0037] As an embodiment, at least one coating portion 121 is arranged to fit the blade of the scraper 112, and a blank area can be formed by coating with the coating portion 121; or there is a gap between each coating portion 121 and the blade of the scraper 112, and by setting the size of the gap, a coating 7 of a preset thickness is formed on the substrate 6, and by changing the size of the gap between each coating portion 121 and the blade of the scraper 112, coatings 7 of different thicknesses can be formed on the same substrate 6.
[0038] As an embodiment, the distance between the discharge port 111 and the coating portion 121 is adjustable, and the distance between the coating portion 121 closest to the discharge port 111 and the discharge port 111 is M', 0≤M≤2mm, or 0≤M'≤1mm, or 0≤M'≤0.5mm. By adjusting the distance M', the distance between the scraper 112 and other coating portions 121 is adjusted, and the thickness of different coatings 7 on the same substrate 6 is uniformly adjusted.
[0039] As an implementation method, Figures 1 to 3 and Figure 6As shown, the coating roller 12 includes at least three coating parts 121. The coating part 121 includes a convex area 121A and a concave area 121B, and the convex areas 121A and the concave areas 121B are arranged alternately in sequence. The convex area 121A is closer to the discharge port 111 than the two adjacent concave areas 121B, and the concave area 121B is farther from the discharge port 111 than the two adjacent convex areas 121A. Specifically, the coating part 121 that is closer to the discharge port 111 than the adjacent coating parts 121 on both sides forms the convex area 121A on the surface of the coating roller 12, and the coating part 121 that is farther from the discharge port 111 than the adjacent coating parts 121 on both sides forms the concave area 121B on the surface of the coating roller 12. Through the convex areas 121A and the concave areas 121B formed by the coating parts 121, coatings 7 with different thicknesses are formed on the same substrate 6. Among them, as Figure 4 shown, the convex area 121A coats and forms a concave coating 72 on the substrate 6, and the concave area 121B coats and forms a convex coating 71 on the substrate 6. The coatings 7 with different thicknesses are connected to each other, and there may also be blank areas in between.
[0040] As an implementation manner, as Figure 5 shown, the distance between two adjacent convex areas 121A or two adjacent concave areas 121B on the coating roller 12 is Q, where 0 < Q ≤ 1 m. As Figure 4 shown, through the coating of the convex area 121A and the concave area 121B, convex coatings 71 and concave coatings 72 with different thicknesses and different spacing widths can be formed on the same coating 7.
[0041] As an implementation manner, as Figures 1 to 4 shown, there are multiple convex areas 121A, and the distances of each convex area 121A from the discharge port 111 are the same, so that coatings 7 with different thicknesses are coated and formed on the substrate 6. And because the convex area 121A coats and forms a concave coating 72 on the substrate 6, the thicknesses of the concave coatings 72 formed by each coating 7 on the substrate 6 are consistent; and / or there are multiple concave areas 121B, and the distances of each concave area 121B from the discharge port 111 are the same, so that coatings 7 with different thicknesses are coated and formed on the substrate 6. And because the concave area 121B coats and forms a convex coating 71 on the substrate 6, the thicknesses of the convex coatings 71 formed by each coating 7 on the substrate 6 are consistent.
[0042] As an implementation manner, the distance between the concave area 121B and the discharge port 111 is M1, and the distance between the convex area 121A and the discharge port 111 is M2, where -1.25 mm ≤ M1 - M2 ≤ 1.25 mm, or -0.5 mm ≤ M1 - M2 ≤ 0.5 mm.
[0043] As an implementation manner, during the coating process, as Figure 4As shown, the roller coating device 1 moves along the coating direction X1 to coat, or moves to the coating starting point along the direction X2 opposite to the coating direction X1 after coating. Thus, by moving the roller coating device 1 without moving the substrate 6 during coating, the problem of the coating 7 breaking after coating when the rotation speed of the coating roller 12 does not match the movement speed of the substrate 6 in the prior art is solved.
[0044] As an implementation method, Figures 1 to 4 As shown, a heating resistor 122 is provided in the coating roller 12. The heating resistor 122 is used to heat the liquid slurry in the silo 11 so that the liquid slurry is coated on the substrate 6 more evenly, or to melt the solid material in the silo 11, such as a solid electrolyte, so that the solid material is melted and evenly coated on the substrate 6.
[0045] As an implementation method, Figure 4 As shown, the silo 11 is provided with a flow blocking device 113, and the material of the flow blocking device 113 can be rubber or plastic. The flow blocking device 113 is used to prevent the slurry from overflowing from the discharge port 111 of the silo 11, and is particularly used to prevent the slurry from overflowing from the lower end of the baffle plate opposite to the baffle plate where the discharge port 111 is located. Among them, along the rotation direction S of the coating roller 12, the discharge port 111 is closer to the uncoated part of the substrate 6 than the flow blocking device 113, that is, in the direction from the coated part of the substrate 6 to the uncoated part along the rotation direction, the discharge port 111 is located downstream of the flow blocking device 113.
[0046] As an implementation manner, the coating layer 7 formed by the coating unit 121 has a thickness ranging from 40 to 100 μm.
[0047] The utility model arranges a plurality of coating portions 121 at different distances from the discharge port 111 on the coating roller 12, so that during the rotating coating process of the coating roller 12, the plurality of coating portions 121 can coat the same substrate 6 to form coatings 7 of different thicknesses, thereby solving the problem that the existing roller coating device 1 is difficult to form coatings 7 of different thicknesses on the same substrate 6, improving the diversity of electrode production, and being able to meet the production requirements of non-standard electrodes for coatings 7 of different thicknesses.
[0048] The utility model also provides a solid-state battery manufacturing system, which can be a solid-state battery 3D printing system, such as Figure 7 As shown, it comprises the roller coating device 1 as described above.
[0049] As an implementation method, Figure 7 As shown, along the coating direction X1, the solid-state battery 3D printing system also includes a solvent volatilization device 2, a compaction device 3, an interface treatment device 4, and a secondary roller coating device 5, which are located downstream of the roller coating device 1 and arranged in sequence.
[0050] As an embodiment, the solvent volatilization device 2 is any one of an infrared heating device, an electric heating device and a laser heat treatment device.
[0051] As an implementation manner, the compacting device 3 includes a compacting upper part 31 and a compacting lower part 32 , wherein the compacting upper part 31 is a compacting roller or a compacting plate, and the compacting lower part 32 is a compacting roller or a compacting plate.
[0052] As an embodiment, when the compacting upper part 31 and the compacting lower part 32 of the compacting device 3 are both compacting rollers, the lower roller diameter D1 ≥ the upper roller diameter D2 . Thus, the coating 7 is not prone to wrinkles and breaks.
[0053] As an embodiment, the compacting roller and / or the compacting plate comprises a heating module, and the heating temperature range of the heating module is 25°C-150°C.
[0054] As an embodiment, the interface processing device 4 includes one or more of an infrared light heating processing device, a plasma processing device, and a laser processing device.
[0055] As an embodiment, the secondary roller coating device 5 has the same configuration as the roller coating device 1 and is used to further coat the positive electrode slurry, the negative electrode slurry or the electrolyte slurry to obtain a solid-state battery through multi-layer step-by-step coating.
[0056] The utility model also provides a method for printing a solid-state battery using the solid-state battery 3D printing system, comprising:
[0057] Step 1: Control the roller coating device 1 to move above the substrate 6 to apply the coating 7 on the substrate 6;
[0058] Step 2: Move the substrate 6, and the substrate 6 passes through the solvent volatilization device 2, the compaction device 3, the interface treatment device 4, and the secondary roller coating device 5 in the coating direction X1. Using 3D printing technology, through roller coating, solvent volatilization, compaction, interface treatment and other steps, the solid-solid interface inside and between the pole pieces is optimized, and a solid-state battery with low interface impedance is formed by repeatedly coating the coating 7 and interface treatment.
[0059] As an embodiment, the method further comprises: before step one, adding the slurry to be coated into the silo 11 of the roller coating device 1.
[0060] As an embodiment, the step 1 includes: the roller coating device 1 moves along a coating direction X1 to perform coating, and after coating is completed, moves along a direction X2 opposite to the coating direction X1 to a coating starting point.
[0061] As an embodiment, the step 2 includes: when the substrate 6 passes through the solvent volatilization device 2, the solvent volatilization device 2 heats the coating 7 on the substrate 6 by infrared heating, electric heating or laser heating, so that the solvent in the slurry volatilizes.
[0062] As an embodiment, the step 2 includes: when the substrate 6 passes through the compacting device 3, controlling the compacting device 3 to flatten the substrate 6 coated with the slurry through a compacting roller and / or a compacting plate.
[0063] As an embodiment, the step 2 includes: when the substrate 6 passes through the interface treatment device 4, the interface treatment device 4 uses one or more methods of infrared heating, plasma treatment, and laser treatment to cure and level the surface of the coating 7.
[0064] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to the technical contents disclosed above without departing from the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the protection scope of the technical solution of the present invention.
Claims
1. A roller coating device, characterized in that: The invention comprises a material bin (11) and a coating roller (12), wherein the material bin (11) is used to contain slurry to be coated, the material bin (11) is provided with a discharge port (111), and the coating roller (12) is installed at the discharge port (111) and is rotatably connected to the material bin (11); the coating roller (12) comprises a plurality of coating parts (121), and at least two of the plurality of coating parts (121) are at different distances from the discharge port (111).
2. The roller coating device according to claim 1, characterized in that: The plurality of coating portions (121) are arranged along an axial direction (L) of the coating roller (12), and the axial direction (L) of the coating roller (12) is perpendicular to a coating direction (X1) in which the coating roller (12) moves relative to the substrate (6).
3. The roller coating device according to claim 2, characterized in that: The coating roller (12) comprises at least three coating portions (121); along the axial direction (L) of the coating roller (12), the distance between the coating portions (121) located at the two ends of the coating roller (12) and the discharge port (111) is less than or equal to the distance between the remaining coating portions (121) and the discharge port (111).
4. The roller coating device according to claim 1, characterized in that: There is a gap between each coating portion (121) and the discharge port (111).
5. The roller coating device according to claim 1, characterized in that: A scraper (112) is provided on the silo (11) at the discharge port (111), the distance between the coating portion (121) and the discharge port (111) is M, and the distance between the coating portion (121) and the scraper (112) is N, wherein M=N.
6. The roller coating device according to claim 5, characterized in that: There is a gap between each coating portion (121) and the blade of the scraper (112).
7. The roller coating device according to claim 4, characterized in that: The distance between the discharge port (111) and the coating portion (121) is adjustable, and the distance between the coating portion (121) closest to the discharge port (111) and the discharge port (111) is M', 0<M'≤2mm.
8. The roller coating device according to claim 1, characterized in that: The coating roller (12) comprises at least three coating parts (121), and the coating part (121) comprises a raised area (121A) and a recessed area (121B), and the raised areas (121A) and the recessed areas (121B) are arranged alternately in sequence, and the raised area (121A) is closer to the discharge port (111) than two adjacent recessed areas (121B), and the recessed area (121B) is farther from the discharge port (111) than two adjacent raised areas (121A).
9. The roller coating device according to claim 8, characterized in that: The distance between two adjacent raised areas (121A) or two adjacent recessed areas (121B) on the coating roller (12) is Q, wherein 0 <Q≤1m。 10. The roller coating device according to claim 8, characterized in that: There are a plurality of raised areas (121A), and each of the raised areas (121A) is at the same distance from the discharge port (111); and / or there are a plurality of recessed areas (121B), and each of the recessed areas (121B) is at the same distance from the discharge port (111).
11. The roller coating device according to claim 8, characterized in that: The distance between the recessed area (121B) and the discharge port (111) is M1, and the distance between the raised area (121A) and the discharge port (111) is M2, wherein -1.25 mm ≤ M1 - M2 ≤ 1.25 mm.
12. A solid-state battery manufacturing system, characterized in that: It comprises a roller coating device (1) as claimed in any one of claims 1 to 11.