Coating equipment

Abstract

The utility model provides coating equipment which comprises a coating roller, the coating roller comprises at least one reticulate pattern section and smooth roller sections located at the two ends of each reticulate pattern section, the reticulate pattern sections are used for forming target coating areas, and the smooth roller sections are used for forming blank areas; and the 3D printing assembly is located in the material incoming direction of the coating station of the coating roller, the 3D printing assembly comprises a printing head, the printing head is used for printing a protective layer, the protective layer is located in the blank area, and the protective layer is adjacent to the target coating. According to the application, the edge area of the pole piece can be reliably coated, so that the tab area can be reliably protected and different areas of the pole piece can be coated with different materials in the pole piece processing process, and the production and processing efficiency of the pole piece can be improved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of battery pole piece processing equipment, and specifically relates to a coating device. Background Art

[0002] Micro-gravure solid-state coating is a reverse, contact-type solid-state coating method. The coating roller, an anilox roller, rotates in the opposite direction of the material film. This method produces a smooth, uniform, and stable coating. Related technologies, such as micro-gravure coating, can only coat the entire width of the substrate. It cannot coat only the center of the substrate, leaving blank areas on the sides, or coat the center and sides of the substrate with different materials separately. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a coating device that can reliably coat the edge area of ​​the diaphragm, which is beneficial for reliably protecting the tab area during the electrode processing process and coating different materials in different areas of the electrode, thereby helping to improve the production and processing efficiency of the electrode.

[0004] In a first aspect, the present invention provides a coating device, comprising:

[0005] A coating roller, comprising at least one anilox segment and smooth roller segments located at both ends of each anilox segment, wherein the anilox segment is used to form a target coating area, and the smooth roller segment is used to form a blank area;

[0006] The 3D printing component is located in the material direction of the coating station of the coating roller. The 3D printing component includes a print head, which is used to print a protective layer. The protective layer is located in the blank area and is adjacent to the target coating.

[0007] As an optional solution, the coating device further includes an adjusting mechanism for adjusting the relative position of the print head and the blank area.

[0008] As an optional solution, the adjustment mechanism includes a pitch adjustment mechanism, which includes a driving member and a transmission member driven by the driving member, the transmission member is connected to the print head, and the driving member drives the transmission member to move the print head so that the print head moves toward or away from the blank area in a direction perpendicular to the axial direction of the coating roller.

[0009] As an optional solution, the adjustment mechanism includes an axial adjustment mechanism, which is used to adjust the print head to move in a direction parallel to the axial direction of the coating roller.

[0010] As an optional solution, the 3D printing device further includes a bracket, and the print head is fixedly mounted on the bracket;

[0011] The axial adjustment mechanism includes a fixed rod, a shaft sleeve, an elastic member and a fixed ring. The fixed rod is arranged parallel to the coating roller, and the bracket is sleeved on the fixed rod.

[0012] The shaft sleeve is sleeved on the fixing rod and is located on the first end surface and the second end surface opposite to the bracket, and the fixing ring is respectively fixed to the areas of the fixing rod located on both sides of the bracket;

[0013] Part of the fixing rod is provided with an external thread, and the inner periphery of the sleeve located on the first end surface of the bracket is provided with an internal thread, the external thread and the internal thread cooperate, and the sleeve abuts against the first end surface;

[0014] The elastic member is sleeved on the fixing rod, and two ends of the elastic member in the elastic deformation direction are respectively in contact with the second end surface and the fixing ring on the other side.

[0015] As an optional solution, the coating equipment also includes a feed assembly, which includes a storage tank, a diaphragm pump, a metering cylinder and an output pipeline. The input end of the diaphragm pump is connected to the discharge port of the storage tank, the output end of the diaphragm pump is connected to the input port of the metering cylinder, the output port of the metering cylinder is connected to the output pipeline, and the output pipeline is connected to the print head;

[0016] The metering cylinder has a first state and a second state, and the metering cylinder is controlled to switch between the first state and the second state to keep the flow of the output pipeline unchanged.

[0017] As an optional solution, the metering cylinder includes a feed cylinder, a discharge cylinder and a switch valve, the feed cylinder is connected to the output end of the diaphragm pump, the discharge cylinder is connected to the output pipeline, a first material delivery passage and a second material delivery passage are formed between the feed cylinder and the discharge cylinder, and the switch valve has a first working state corresponding to the first state and a second working state corresponding to the second state;

[0018] When the switch valve is in the first working state, the first material delivery passage is connected, the second material delivery passage is disconnected, and the metering cylinder is in the first state;

[0019] When the switch valve is in the second working state, the first material delivery passage is disconnected, the second material delivery passage is connected, and the metering cylinder is in the second state.

[0020] As an optional solution, a first pipeline, a second pipeline and a third pipeline are provided between the feed cylinder and the discharge cylinder, the first pipeline is located on the feed cylinder side, the third pipeline is located on the discharge cylinder side, and the second pipeline is located between the first pipeline and the third pipeline. The switch valve defines a first material delivery passage and a second material delivery passage between the first pipeline, the second pipeline and the third pipeline;

[0021] The metering cylinder also includes a piston and a drive motor. The drive motor is drive-connected to the piston. The piston is arranged in the second pipeline. The drive member drives the piston to move to adjust the switch valve to be in the first working state or the second working state.

[0022] As an optional solution, the switch valve includes a first two-position three-way valve and a second two-position three-way valve, and the first two-position three-way valve and the second two-position three-way valve are arranged at the connection point of the first pipeline, the second pipeline and the third pipeline;

[0023] When the piston regulating switch valve is in the first working state, the first end of the first two-position three-way valve is connected to the first pipeline, the second end of the first two-position three-way valve is connected to the second pipeline, the third end of the first two-position three-way valve is closed, the first end of the second two-position three-way valve is closed, the second end of the second two-position three-way valve is connected to the second pipeline, and the third end of the second two-position three-way valve is closed;

[0024] When the piston regulating switch valve is in the second working state, the first end of the first two-position three-way valve is closed, the second end of the first two-position three-way valve is connected to the second pipeline, the third end of the first two-position three-way valve is connected to the third pipeline, the first end of the second two-position three-way valve is connected to the first pipeline, the second end of the second two-position three-way valve is connected to the second pipeline, and the third end of the second two-position three-way valve is closed;

[0025] As an optional solution, the feed assembly also includes a diverter valve and a return line, the first end of the diverter valve is connected to the output port of the metering cylinder, the second end of the diverter valve is connected to the output line, and the return line is respectively connected to the third end of the diverter valve and the feed port of the storage tank.

[0026] The coating equipment of the present invention is provided with a 3D printing component, and the print head of the 3D printing component is used to print a protective layer. The protective layer is correspondingly arranged in the blank area, and the protective layer is adjacent to the target coating, which solves the problem that the current micro-gravure solid-state introduction method can only coat the entire width, but cannot coat different materials in different areas. This is conducive to partitioning the coating of the to-be-processed area on the surface of the electrode during the electrode processing process, reliably protecting the pole ear area, and avoiding the occurrence of foil leakage area, further improving the production and processing quality of the electrode, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0028] Figure 1 A front view of a coating device according to an embodiment of the present application;

[0029] Figure 2 A side view of a coating device according to an embodiment of the present application;

[0030] Figure 3 This is a schematic structural diagram of an adjustment mechanism and a 3D printing component in a coating device according to an embodiment of the present application;

[0031] Figure 4A structural side view of an adjustment mechanism and a 3D printing component in a coating device according to an embodiment of the present application;

[0032] Figure 5 This is a schematic structural diagram of an axial adjustment mechanism of a 3D printing component in a coating device according to an embodiment of the present application;

[0033] Figure 6 This is a schematic structural diagram of a feeding assembly in a coating device according to an embodiment of the present application;

[0034] Figure 7 This is a schematic diagram of the structure of a metering cylinder in a coating device according to an embodiment of the present application;

[0035] Figure 8 This is a schematic diagram of the flow direction of slurry in a coating device according to an embodiment of the present application, in which a metering cylinder is in a first state;

[0036] Figure 9 This is a schematic diagram of the flow direction of the slurry when the metering cylinder in a coating device of an embodiment of the present application is in the second state.

[0037] In the figure,

[0038] 100. Coating equipment;

[0039] 1. Coating roller, roller A1, roller A2, 3. Hot oil roller, 4. Pole piece;

[0040] 10. 3D printing component, 11. print head, 12. bracket, first end surface S1, second end surface S2;

[0041] 20. Adjustment mechanism, 21. Cylinder fixing bracket, 22. Cylinder, 23. Fixing rod, 24. Bushing, external thread L1, internal thread L2, 25. Elastic member, 26. Fixing ring, 27. Gasket;

[0042] 30. Feed assembly, 31. Storage tank, 32. Diaphragm pump, 33. Metering cylinder, 331. Feed cylinder, 332. Discharge cylinder, 333. First pipeline, 334. Second pipeline, 335. Third pipeline, 336. First two-position three-way valve, 337. Second two-position three-way valve, 338. Piston, 339. Drive motor, 34. Diverter valve, 35. Output pipeline, 36. Return pipeline, 37. Filter, 38. Agitator. DETAILED DESCRIPTION

[0043] The present application will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model.

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the embodiments.

[0045] The embodiment of the present application provides a coating device 100, such as Figure 1 and 2 Shown, including:

[0046] A coating roller 1, comprising at least one anilox segment and smooth roller segments located at both ends of each anilox segment, wherein the anilox segment is used to form a target coating area, and the smooth roller segment is used to form a blank area;

[0047] The 3D printing component 10 is located in the material direction of the coating station of the coating roller 1. The 3D printing component 10 includes a print head 11. The print head 11 is used to print a protective layer. The protective layer is located in the blank area and is adjacent to the target coating.

[0048] It should be noted that the coating equipment of the embodiment of the present application can be used to coat different materials on the surface of the pole pieces in the battery production process, and of course can also be used to coat other sheet substrates.

[0049] It can be understood that the textured segment refers to the concave and convex structure arranged in a certain manner formed on the surface of the coating roller 1. During the electrode processing, the coating liquid is poured into an open material box, and the material box is raised to immerse the textured segment of the coating roller 1 in the liquid. The coating roller 1 is rotated and the liquid on the coating roller 1 is scraped flat by a scraper. The textured segment of the coating roller 1 forms a target coating on the surface of the current collector, and correspondingly, the smooth roller segment of the coating roller 1 forms a blank area on the surface of the current collector.

[0050] Among them, the electrode processing process includes multiple electrode processing steps. After the previous step is completed, the electrode is transferred to the next step for further processing. Here, the incoming material direction of the coating station of the coating roller 1 refers to the direction of the previous step of the current step; it can be understood that the 3D printing component 10 first prints a protective layer on the blank area of ​​the electrode 4, and then the electrode is transferred to the coating station of the coating roller 1, and the textured segment of the coating roller 1 is coated on the electrode to form a target coating.

[0051] It can also be understood that the material of the protective layer can be, but is not limited to, a solid electrolyte material, such as an oxide solid electrolyte, a sulfide solid electrolyte, a halide solid electrolyte, or a boride solid electrolyte; wherein the oxide solid electrolyte includes at least one of a garnet-type solid electrolyte, a perovskite-type solid electrolyte, a NASICON-type solid electrolyte, and a lithium-phosphorus-oxygen-nitrogen solid electrolyte;

[0052] The sulfide solid electrolyte includes at least one of an Argyrodite-type solid electrolyte, a Thio-LiSICON-type solid electrolyte, and a glass-ceramic Li2S-P2S5;

[0053] Halide solid electrolytes include LiX, Li2MX4, Li3M'X6 and Li a M'' b Ln c Cl3; wherein X includes at least one of F, Cl, Br and I, M includes at least one of Mg, Mn, Fe, Zn and Cd, M' includes at least one of O, In, Y, Sc, Ho, Yb, Lu and Er, M'' includes at least one of Ta, Zr, Ca and Al, Ln includes at least one of La, Ce, Pr, Nd and Sm, 0 < a ≤ 0.5, 0 ≤ b ≤ 0.83, 0 < c ≤ 0.83;

[0054] Boride solid electrolytes include Li2B n X n (X includes Cl, Br, H; n = 10, 12), LiBH4, LiCB n H n+1 (n=9,11), Li3BO3, Li2B4O7, Li2O-B2O3-P2O5, Li5B7S 13 、Li3BS3、Li9B 19 S3, Li2B2S5, Li 10 B 10 S 20 、Li 6+2x [B 10 S 18 ]S x At least one of (x≈1); the embodiments of the present application do not specifically limit the material of the protective layer, as long as it can be ensured that the protective layer can be printed in the blank area; and in the embodiments of the present application, the protective layer is adjacent to the target coating, which means that the protective layer is located at the edge of the target coating and there is no gap between the protective layer and the target coating, which is beneficial to reliably protect the tab area on the one hand, and on the other hand, it is beneficial to avoid the formation of a leaking foil area during the die-cutting process.

[0055] Among them, according to the number of coating rollers 1 in the actual coating equipment, a print head 11 of a 3D printing component 10 is correspondingly set for the optical roller segment of each coating roller 1, that is, at least two print heads 11 of the 3D printing component 10 are set in the material feeding direction of each coating roller 1.

[0056] The coating equipment of the embodiment of the present application solves the problem that the existing micro-gravure solid-state introduction method can only coat the entire width, but cannot coat different materials in different areas. The coating equipment of the embodiment of the present application sets a 3D printing component 10 in the material direction of the coating station of the coating roller 1. The print head 11 of the 3D printing component 10 is used to print a protective layer on the blank area of ​​the electrode and the electrode to cover and protect the blank area. Then the textured section of the coating roller 1 forms a target coating on the electrode, and the protective layer and the target coating are adjacent, thereby realizing the zoned coating of the area to be processed on the electrode surface during the electrode processing process, reliably protecting the electrode ear area, and avoiding the occurrence of foil leakage area, which is further beneficial to improving the production and processing quality of the electrode and improving production efficiency.

[0057] As an achievable method, Figure 3-5 As shown, the coating device further includes an adjusting mechanism 20, which is used to adjust the relative position of the print head 11 and the blank area.

[0058] It can be understood that due to the different sizes of the current collectors and actual process requirements, adjusting the relative position of the print head 11 and the blank area through the adjustment mechanism 20 is beneficial to ensure that the print head 11 is set at the target position of the blank area so as to reliably form a protective layer in the blank area.

[0059] Among them, the adjustment mechanism 20 can drive the print head 11 to move in a direction perpendicular to the axial direction of the coating roller 1, so that the print head 11 is close to or away from the blank area; of course, the adjustment mechanism 20 can also drive the print head 11 to move in a direction parallel to the axial direction of the coating roller 1 to adjust the position of the print head 11 in the blank area; in some embodiments, the adjustment mechanism 20 can also drive the print head 11 to rotate in a predetermined direction. The implementation method of the present application does not make specific limitations on this, as long as the relative position of the print head 11 and the blank area can be adjusted to achieve the print head 11 Reliably form a protective layer in the blank area.

[0060] This embodiment is conducive to adjusting the relative position between the print head 11 and the blank area, thereby reliably realizing printing and forming a protective layer in the blank area.

[0061] In some embodiments, the adjustment mechanism 20 includes a pitch adjustment mechanism 20, the pitch adjustment mechanism 20 includes a driving member and a transmission member driven by the driving member, the transmission member is connected to the print head 11, and the driving member drives the transmission member to move the print head 11 so that the print head 11 moves toward or away from the blank area in a direction perpendicular to the axial direction of the coating roller 1.

[0062] It can be understood that the pitch adjustment mechanism 20 is used to drive the print head 11 to move toward or away from the blank area in a direction perpendicular to the axial direction of the coating roller 1; wherein, the driving member can be but is not limited to a driving motor 339 or a cylinder 22, etc.; the transmission member can be but is not limited to a connecting rod or a transmission shaft, etc., and under the drive of the driving member, the transmission member drives the print head 11 to move toward or away from the blank area in a direction perpendicular to the axial direction of the coating roller 1.

[0063] The pitch adjustment mechanism 20 of this embodiment has a simple structure and can reliably drive the print head 11 to adjust the relative position of the print head 11 .

[0064] For example, the coating equipment includes a cylinder 22 fixing rod 23, which is arranged parallel to the coating roller 1, and the cylinder 22 fixing rod 23 is fixedly installed with the cylinder 22. The output shaft of the cylinder 22 is connected to the transmission shaft, and the transmission shaft is connected to the main body of the 3D printing component 10. The printing is installed on the main body of the 3D printing component 10. The reciprocating motion of the cylinder 22 drives the main body of the 3D printing component 10 to move in a direction perpendicular to the axial direction of the coating roller 1, so as to realize the movement of the print head 11 toward or away from the blank area.

[0065] In some other embodiments, the adjustment mechanism 20 includes an axial adjustment mechanism 20 , and the axial adjustment mechanism 20 is used to adjust the print head 11 to move along a direction parallel to the axial direction of the coating roller 1 .

[0066] In this embodiment, the print head 11 moves in a direction parallel to the axial direction of the coating roller 1, which can accurately adjust the position of the print head 11 in the blank area and can also adjust the width of the printed protective layer in the blank area.

[0067] The axial adjustment mechanism 20 may be, but is not limited to, a ball screw or other telescopic structures, as long as it can ensure that the print head 11 moves in a direction parallel to the axial direction of the coating roller 1 .

[0068] In a preferred embodiment, the 3D printing device further comprises a bracket 12 , and the print head 11 is fixedly mounted on the bracket 12 ;

[0069] The axial adjustment mechanism 20 includes a fixing rod 23, a sleeve 24, an elastic member 25 and a fixing ring 26. The fixing rod 23 is arranged parallel to the coating roller 1, and the bracket 12 is sleeved on the fixing rod 23.

[0070] The shaft sleeve 24 is sleeved on the fixing rod 23 and is located on the first end surface S1 and the second end surface S2 opposite to the bracket 12. The fixing ring 26 is fixed to the areas on both sides of the fixing rod 23 of the bracket 12.

[0071] A portion of the fixing rod 23 is provided with an external thread L1, and an inner circumference of the sleeve 24 located on the first end surface S1 of the bracket 12 is provided with an internal thread L2. The external thread L1 and the internal thread L2 cooperate with each other, and the sleeve 24 abuts against the first end surface S1.

[0072] The elastic member 25 is sleeved on the fixing rod 23 , and both ends of the elastic member 25 in the elastic deformation direction respectively abut against the second end surface S2 and the fixing ring 26 on the other side.

[0073] In the axial adjustment mechanism 20 of this embodiment, the fixed rod 23 serves as the bearing body, the 3D component bracket 12 is installed on the fixed rod 23, and the print head 11 is installed on the bracket 12. The movement of the bracket 12 along the fixed rod 23 enables the print head 11 to move in a direction parallel to the axial direction of the coating roller 1; wherein, the fixed ring 26 can be fixed to the fixed rod 23 by any connection method, such as but not limited to welding, etc.; when it is necessary to adjust the print head 11 to move in a direction parallel to the axial direction of the coating roller 1, due to the elastic action between the sleeve 24 located on the second end face S2 of the bracket 12 and the fixed ring 26, the first end face S1 of the bracket 12 and the sleeve 24 are in close contact, and the bracket 12 is moved along the length direction of the fixed rod 23 by loosening the threaded fit between the sleeve 24 and the fixed rod 23 located on the first end face S1 of the bracket 12. After the bracket 12 moves to the target position, the position of the bracket 12 is fixed by tightening the threaded fit between the sleeve 24 and the fixed rod 23.

[0074] The axial adjustment mechanism 20 in this embodiment is simple, and while achieving the installation of the 3D printing component, the print head 11 can be reliably moved in a direction parallel to the axial direction of the coating roller 1 through the cooperation of the elastic member 25 and the thread.

[0075] The elastic member 25 may be, but is not limited to, a rigid spring.

[0076] In some embodiments, in order to securely fix the 3D assembly, the fixing ring 26 and the sleeve 24 bracket 12 may further be provided with a gasket 27 .

[0077] As an achievable method, Figure 6-9 As shown, the coating equipment further includes a feed assembly 30, which includes a storage tank 31, a diaphragm pump 32, a metering cylinder 33 and an output pipeline 35. The input end of the diaphragm pump 32 is connected to the discharge port of the storage tank 31, the output end of the diaphragm pump 32 is connected to the input port of the metering cylinder 33, the output port of the metering cylinder 33 is connected to the output pipeline 35, and the output pipeline 35 is connected to the print head 11;

[0078] The metering cylinder 33 has a first state and a second state. The metering cylinder 33 is controlled to switch between the first state and the second state to keep the flow of the output pipeline 35 unchanged.

[0079] Among them, the material storage tank 31 is mainly used to store raw materials used to print the protective layer of the 3D printing component 10. For example, the material storage tank 31 contains a fixed electrolyte slurry. In some embodiments, the material storage tank 31 is also equipped with a stirring member 38. The stirring member 38 is located inside the material storage tank 31 and continuously stirs the slurry contained in the material storage tank 31 to prevent the slurry from settling or stratifying, thereby maintaining a uniform slurry mixture. The diaphragm pump 32 is used to transfer the material from the material storage tank 31 to the metering cylinder 33. The metering cylinder 33 is used to accurately control the flow rate of the output slurry to ensure a stable and continuous output of a certain flow rate of slurry, thereby ensuring that the 3D printing component 10 can reliably print the protective layer. The output pipeline 35 is used to transport the slurry to the print head 11 of the 3D printing component 10. In some embodiments, to prevent clogging or affecting the normal printing of the print head 11, a filter 37 can also be provided between the output of the diaphragm pump 32 and the input of the metering cylinder 33.

[0080] It can be understood that the metering cylinder 33 has a first state and a second state, wherein the first state and the second state can be, but are not limited to, the flow direction of the slurry in the metering cylinder 33, or the degree of connectivity between the diaphragm pump 32 and the input port of the metering cylinder 33. By controlling the switching of the first state and the second state of the metering cylinder 33, it is beneficial to accurately adjust the flow rate of the output slurry and ensure that the flow rate of the output slurry remains stable.

[0081] In some embodiments, the metering cylinder 33 includes a feed cylinder 331, a discharge cylinder 332, and a switch valve. The feed cylinder 331 is connected to the output end of the diaphragm pump 32, and the discharge cylinder 332 is connected to the output pipeline 35. A first material delivery passage and a second material delivery passage are formed between the feed cylinder 331 and the discharge cylinder 332. The switch valve has a first working state corresponding to the first state and a second working state corresponding to the second state.

[0082] When the switch valve is in the first working state, the first material delivery passage is connected, the second material delivery passage is disconnected, and the metering cylinder 33 is in the first state;

[0083] When the switch valve is in the second working state, the first material delivery passage is disconnected, the second material delivery passage is connected, and the metering cylinder 33 is in the second state.

[0084] It can be understood that the flow rate of the slurry output by the diaphragm pump 32 is large and the flow rate is unstable. The embodiment of the present application sets a feed cylinder 331, a switch valve and a discharge cylinder 332. The slurry is first input into the feed cylinder 331 through the diaphragm pump 32, and the first feed circuit or the second feed circuit is connected by adjusting the switch valve, which is conducive to the stable output of the slurry to the discharge cylinder 332, and thus the stable output to the print head 11.

[0085] Among them, the flow paths and directions of the slurry in the first feeding loop and the second feeding loop are different. By adjusting the switch valve to selectively connect the first feeding loop and the second feeding loop, it is beneficial to the flow rate and flow velocity of the slurry, so that the slurry can be output stably.

[0086] The switch valve may be, but is not limited to, various pneumatic switch valves, hydraulic switch valves, or electromagnetic valves.

[0087] As an achievable method, Figure 7 As shown, a first pipeline 333, a second pipeline 334 and a third pipeline 335 are provided between the feed cylinder 331 and the discharge cylinder 332. The first pipeline 333 is located on the side of the feed cylinder 331, the third pipeline 335 is located on the side of the discharge cylinder 332, and the second pipeline 334 is located between the first pipeline 333 and the third pipeline 335. The switch valve defines a first material delivery passage and a second material delivery passage between the first pipeline 333, the second pipeline 334 and the third pipeline 335.

[0088] The metering cylinder 33 also includes a piston 338 and a drive motor 339. The drive motor 339 is connected to the piston 338. The piston 338 is arranged in the second pipeline 334. The drive member drives the piston 338 to move to adjust the switch valve to be in the first working state or the second working state.

[0089] In this embodiment, a first pipeline 333, a second pipeline 334 and a third pipeline 335 are arranged between the feed cylinder 331 and the discharge cylinder 332, which realizes diversion well and is conducive to accurately adjusting the flow rate of the output slurry; wherein, a piston 338 is arranged in the second pipeline 334, and the piston 338 is driven to move in the second pipeline 334, so that the pressure difference in the first pipeline 333, the second pipeline 334 and the third pipeline 335 changes, thereby adjusting the working state of the switch valve; for example, the piston 338 moves downward along the second pipeline 334, and the switch valve is in the first working state; the piston 338 moves upward along the second pipeline 334, and the switch valve is in the second working state.

[0090] In a preferred embodiment, the switch valve includes a first two-position three-way valve 336 and a second two-position three-way valve 337, and the first two-position three-way valve 336 and the second two-position three-way valve 337 are arranged at the connection point of the first pipeline 333, the second pipeline 334 and the third pipeline 335;

[0091] like Figure 8As shown, when the piston 338 regulates the on-off valve in the first working state, the first end of the first two-position three-way valve 336 is connected to the first pipeline 333, the second end of the first two-position three-way valve 336 is connected to the second pipeline 334, the third end of the first two-position three-way valve 336 is closed, the first end of the second two-position three-way valve 337 is closed, the second end of the second two-position three-way valve 337 is connected to the second pipeline 334, and the third end of the second two-position three-way valve 337 is closed;

[0092] like Figure 9 As shown, when the piston 338 regulates the switch valve to be in the second working state, the first end of the first two-position three-way valve 336 is closed, the second end of the first two-position three-way valve 336 is connected to the second pipeline 334, the third end of the first two-position three-way valve 336 is connected to the third pipeline 335, the first end of the second two-position three-way valve 337 is connected to the first pipeline 333, the second end of the second two-position three-way valve 337 is connected to the second pipeline 334, and the third end of the second two-position three-way valve 337 is closed.

[0093] Among them, a two-position three-way valve is a valve used to control the flow direction of a fluid, and has two working positions and three channel ports.

[0094] In this embodiment, the two-position three-way valve has a simple structure and can reliably realize diversion; by driving the piston 338 to move in the second pipeline 334, a pressure difference is generated in the first pipeline 333, the second pipeline 334 and the third pipeline 335, so the connection ports of the first two-position three-way valve 336 and the second two-position three-way valve 337 change, thereby realizing the connection of the first infusion circuit or the second infusion circuit.

[0095] As a feasible method, the feed assembly 30 also includes a diverter valve 34 and a return line 36. The first end of the diverter valve 34 is connected to the output port of the metering cylinder 33, the second end of the diverter valve 34 is connected to the output line 35, and the return line 36 is respectively connected to the third end of the diverter valve 34 and the feed port of the storage tank 31.

[0096] The diverter valve 34 in this embodiment can also be used to control the flow of slurry entering the print head 11. The diverter valve 34 is connected to the return line 36, which is conducive to recovering the slurry and avoiding waste of slurry.

[0097] The diverter valve 34 can be any type of three-way valve.

[0098] In some embodiments, a filter 37 may be further provided between the return line 36 and the feed port of the storage tank 31 to prevent impurities from entering the storage tank 31 and ensure the quality of the slurry in the storage tank 31 .

[0099] In summary, the coating device of the embodiment of the present application is provided with a 3D printing component 10, and the print head 11 of the 3D printing component 10 is used to print a protective layer. The protective layer is correspondingly provided in the blank area, and the protective layer is adjacent to the target coating. This solves the problem that the current micro-gravure solid-state introduction method can only fully coat the entire width, but cannot coat different materials in different areas. This is conducive to partitioning the coating of the to-be-processed area on the surface of the electrode during the electrode processing process, reliably protecting the tab area, while avoiding the occurrence of foil leakage areas, further improving the production and processing quality of the electrode, and improving production efficiency.

[0100] In addition, the adjustment mechanism 20 is conducive to adjusting the relative position of the print head 11 and the blank area, further ensuring that the protective layer is printed in the blank area; the setting of the metering cylinder 33 is conducive to accurately controlling the output flow of the slurry, ensuring that the slurry is continuously and stably output to the print head 11, thereby ensuring that the 3D printing component 10 works reliably and the protective layer is reliably printed in the blank area.

[0101] The coating equipment of the present application is described below through a specific embodiment.

[0102] like Figure 1-9 As shown, the coating equipment includes a coating roller 1, a roller A1, a hot oil roller 3 and a 3D printing component 10. The electrode is sequentially passed through the 3D printing component 10, the hot oil roller 3, the coating roller 1 and the roller. In order to ensure that the surface of the target coating formed by the coating roller 1 is smooth, a roller A2 is further provided above the coating roller 1. The electrode is positioned between the roller A2 and the coating roller 1. The coating roller 1 coats the electrode to form a target coating. The areas on both sides of the target coating are blank areas. The 3D printing component 10 includes a bracket 12 and a print head 11. The print head 11 is fixedly mounted on the bracket 12. The print head 11 is arranged corresponding to the blank area of ​​the electrode.

[0103] The coating device further includes a cylinder fixing frame 21, on which a cylinder 22 is mounted. The output shaft of the cylinder 22 is connected to the bracket 12. The output shaft of the cylinder 22 is arranged along a direction perpendicular to the axial direction of the coating roller 1. The cylinder 22 drives the bracket 12 to move along a direction perpendicular to the axial direction of the coating roller 1, so that the printing moves closer to or away from the blank area.

[0104] The coating device also includes a fixing rod 23, a sleeve 24, an elastic member 25 and a fixing ring 26. The fixing rod 23 is arranged in a direction parallel to the axial direction of the coating roller 1. The fixing rod 23 passes through the bracket 12, and the bracket 12 is sleeved on the fixing rod 23. The first end face S1 and the second end face S2 opposite to the bracket 12 are respectively provided with sleeves 24. The fixing ring 26 is fixed to the area located on both sides of the bracket 12. Part of the fixing rod 23 is provided with an external thread L1. The inner periphery of the sleeve 24 located on the first end face S1 of the bracket 12 is provided with an internal thread L2. The external thread L1 and the internal thread L2 cooperate, and the sleeve 24 on the first end face S1 of the displacement bracket 12 abuts against the first end face S1 of the bracket 12; the elastic member 25 It is sleeved on the fixing rod 23, and the two ends of the elastic member 25 in the elastic deformation direction are respectively in contact with the second end face S2 and the fixing ring 26. Due to the elastic action between the sleeve 24 located at the second end face S2 of the bracket 12 and the fixing ring 26, the first end face S1 of the bracket 12 and the sleeve 24 are in tight contact. By loosening the threaded fit between the sleeve 24 and the fixing rod 23 located at the first end face S1 of the bracket 12, the bracket 12 is moved along the length direction of the fixing rod 23, so that the bracket 12 drives the print head 11 to move along the direction parallel to the axial direction of the coating roller 1. After the bracket 12 moves to the target position, the position of the bracket 12 is fixed by tightening the threaded fit between the sleeve 24 and the fixing rod 23.

[0105] The coating equipment also includes a storage tank 31, a diaphragm pump 32, a metering cylinder 33 and an output pipeline 35. The input end of the diaphragm pump 32 is connected to the discharge port of the storage tank 31, the output end of the diaphragm pump 32 is connected to the input port of the metering cylinder 33, the output port of the metering cylinder 33 is connected to the output pipeline 35, and the output pipeline 35 is connected to the print head 11;

[0106] Among them, a stirring member 38 is installed inside the storage tank 31 to continuously stir the slurry to prevent stratification or sedimentation of the slurry; the metering cylinder 33 includes a feeding cylinder 331, a discharging cylinder 332 and a switch valve, and a first pipeline 333, a second pipeline 334 and a third pipeline 335 are provided between the feeding cylinder 331 and the discharging cylinder 332. The first pipeline 333 is located on the side of the feeding cylinder 331, the third pipeline 335 is located on the side of the discharging cylinder 332, and the second pipeline 334 is located between the first pipeline 333 and the third pipeline 335. A first material feeding passage and a second material feeding passage are defined between the first pipeline 333, the second pipeline 334 and the third pipeline 335. A piston 338 is provided inside the second pipeline 334, and a first two-position three-way valve 336 and a second two-position three-way valve 337 are provided at the connecting point of the first pipeline 333, the second pipeline 334 and the third pipeline 335;

[0107] The driving piston 338 moves downward along the second pipeline 334, the first end of the first two-position three-way valve 336 is closed, the second end of the first two-position three-way valve 336 is connected to the second pipeline 334, the third end of the first two-position three-way valve 336 is connected to the third pipeline 335, the first end of the second two-position three-way valve 337 is connected to the first pipeline 333, the second end of the second two-position three-way valve 337 is connected to the second pipeline 334, and the third end of the second two-position three-way valve 337 is closed. In this way, the first material delivery passage is connected, and the slurry is reliably delivered to the print head 11.

[0108] The piston 338 is driven to move upward along the second pipeline 334. The first end of the first two-position three-way valve 336 is connected to the first pipeline 333, the second end of the first two-position three-way valve 336 is connected to the second pipeline 334, the third end of the first two-position three-way valve 336 is closed, the first end of the second two-position three-way valve 337 is closed, the second end of the second two-position three-way valve 337 is connected to the second pipeline 334, and the third end of the second two-position three-way valve 337 is closed. In this way, the second infusion passage is connected, and the slurry is reliably output to the print head 11.

[0109] The coating equipment also includes a three-way valve and a return line 36. The first end of the three-way valve is connected to the output port of the metering cylinder 33, the second end of the three-way valve is connected to the output line 35, and the return line 36 is respectively connected to the third end of the three-way valve and the feed port of the storage tank 31.

[0110] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. Coating equipment, characterized in that, The coating equipment includes: A coating roller, comprising at least one textured segment and smooth roller segments located at both ends of each textured segment, wherein the textured segment is used to form a target coating area, and the smooth roller segment is used to form a blank area; A 3D printing component is located in the material feeding direction of the coating station of the coating roller, and the 3D printing component includes a print head, and the print head is used to print a protective layer, the protective layer is located in the blank area, and the protective layer is adjacent to the target coating.

2. The coating device according to claim 1, characterized in that The coating device further includes an adjusting mechanism for adjusting the relative position of the print head and the blank area.

3. The coating device according to claim 2, characterized in that The adjustment mechanism includes a pitch adjustment mechanism, which includes a driving member and a transmission member driven by the driving member. The transmission member is connected to the print head, and the driving member drives the transmission member to move the print head so that the print head moves toward or away from the blank area in a direction perpendicular to the axial direction of the coating roller.

4. The coating device according to claim 2, characterized in that The adjustment mechanism includes an axial adjustment mechanism, and the axial adjustment mechanism is used to adjust the print head to move along a direction parallel to the axial direction of the coating roller.

5. The coating device according to claim 4, characterized in that The 3D printing assembly further includes a bracket, and the print head is fixedly mounted on the bracket; The axial adjustment mechanism includes a fixing rod, a shaft sleeve, an elastic member and a fixing ring, wherein the fixing rod is arranged parallel to the coating roller, and the bracket is sleeved on the fixing rod; The shaft sleeve is sleeved on the fixing rod and is located on the first end surface and the second end surface opposite to the bracket, and the fixing rings are respectively fixed to the areas of the fixing rod located on both sides of the bracket; A portion of the fixing rod is provided with an external thread, and an inner circumference of the sleeve located on the first end surface of the bracket is provided with an internal thread, the external thread and the internal thread cooperate, and the sleeve abuts against the first end surface; The elastic member is sleeved on the fixing rod, and both ends of the elastic member in the elastic deformation direction are respectively in contact with the second end surface and the fixing ring.

6. The coating device according to any one of claims 1 to 5, characterized in that: The coating equipment also includes a feed assembly, which includes a storage tank, a diaphragm pump, a metering cylinder and an output pipeline. The input end of the diaphragm pump is connected to the discharge port of the storage tank, the output end of the diaphragm pump is connected to the input port of the metering cylinder, the output port of the metering cylinder is connected to the output pipeline, and the output pipeline is connected to the print head; The metering cylinder has a first state and a second state, and the metering cylinder is controlled to switch between the first state and the second state to keep the flow of the output pipeline unchanged.

7. The coating device according to claim 6, characterized in that The metering cylinder includes a feed cylinder, a discharge cylinder and a switch valve, the feed cylinder is connected to the output end of the diaphragm pump, the discharge cylinder is connected to the output pipeline, a first material delivery passage and a second material delivery passage are formed between the feed cylinder and the discharge cylinder, and the switch valve has a first working state corresponding to the first state and a second working state corresponding to the second state; When the switch valve is in the first working state, the first material delivery passage is connected, the second material delivery passage is disconnected, and the metering cylinder is in the first state; When the switch valve is in the second working state, the first material delivery passage is disconnected, the second material delivery passage is connected, and the metering cylinder is in the second state.

8. The coating device according to claim 7, characterized in that A first pipeline, a second pipeline, and a third pipeline are provided between the feed cylinder and the discharge cylinder, wherein the first pipeline is located on the feed cylinder side, the third pipeline is located on the discharge cylinder side, and the second pipeline is located between the first pipeline and the third pipeline. The switch valve defines the first and second material delivery passages between the first, second, and third pipelines; The metering cylinder also includes a piston and a drive motor. The drive motor is drive-connected to the piston. The piston is arranged in the second pipeline. The drive motor drives the piston to move to adjust the switch valve to be in the first working state or the second working state.

9. The coating device according to claim 8, characterized in that The switch valve includes a first two-position three-way valve and a second two-position three-way valve, wherein the first two-position three-way valve and the second two-position three-way valve are arranged at the connection point of the first pipeline, the second pipeline and the third pipeline; When the piston adjusts the switch valve to be in the first working state, the first end of the first two-position three-way valve is connected to the first pipeline, the second end of the first two-position three-way valve is connected to the second pipeline, the third end of the first two-position three-way valve is closed, the first end of the second two-position three-way valve is closed, the second end of the second two-position three-way valve is connected to the second pipeline, and the third end of the second two-position three-way valve is closed; When the piston adjusts the switch valve to be in the second working state, the first end of the first two-position three-way valve is closed, the second end of the first two-position three-way valve is connected to the second pipeline, the third end of the first two-position three-way valve is connected to the third pipeline, the first end of the second two-position three-way valve is connected to the first pipeline, the second end of the second two-position three-way valve is connected to the second pipeline, and the third end of the second two-position three-way valve is closed.

10. The coating device according to claim 6, characterized in that The feed assembly also includes a diverter valve and a return line. The first end of the diverter valve is connected to the output port of the metering cylinder, the second end of the diverter valve is connected to the output line, and the return line is respectively connected to the third end of the diverter valve and the feed port of the storage tank.

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