Coating apparatus

Abstract

The utility model discloses a kind of coating equipment, it is related to battery manufacturing technical field.Coating equipment includes base, coating assembly, drying cabinet, unwinding roller and winding roller, coating assembly is located in base, coating assembly is equipped with multiple, multiple coating assembly is used to carry out multilayer coating to pole piece, every coating assembly includes plate roller, plate roller is detachably rotatably connected with base;Drying cabinet is located in base, for the pole piece after being coated by every coating assembly carries out drying;Unwinding roller is located in base, one end of pole piece is located in unwinding roller;Winding roller is located in base, the other end of pole piece is located in winding roller, winding roller is used to wind the pole piece dried by drying cabinet.The technical scheme provided by the utility model realizes the quick change of plate roller, and then improve the use flexibility of coating equipment.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a coating device. Background Technology

[0002] Electrodes are critical components in battery manufacturing, and their quality directly affects battery performance and safety. Coating equipment is used to uniformly coat the electrode sheet with a slurry containing a mixture of active materials, conductive agents, and binders to form the electrode. The uniformity and stability of the coating are crucial to the quality of the electrode. Currently, common coating equipment mainly employs roller coating technology. The roller is the core component of the coating equipment, and the pattern on its surface determines the coating thickness and uniformity of the slurry.

[0003] Most existing coating equipment directly fixes the printing roller to the base, making the replacement process complicated or even impossible, thus making the existing coating equipment incompatible with different electrode sheets. Utility Model Content

[0004] The main purpose of this invention is to propose a coating equipment that enables quick change of the coating roller and improves the flexibility of the coating equipment.

[0005] To achieve the above objectives, the present invention provides a coating apparatus for coating electrode sheets, comprising:

[0006] abutment;

[0007] A coating assembly is provided on the base. Multiple coating assemblies are provided, and multiple coating assemblies are used to apply multi-layer coating to the electrode sheet. Each coating assembly includes a printing roller, and the printing roller is detachably and rotatably connected to the base.

[0008] A drying oven, located on the base, is used to dry the electrode sheet after it has been coated by any of the coating components;

[0009] An unwinding roller is disposed on the base, and one end of the electrode sheet is disposed on the unwinding roller; and

[0010] A take-up roller is provided on the base, and the other end of the electrode sheet is provided on the take-up roller. The take-up roller is used to take up the electrode sheet after it has been dried in the drying box.

[0011] In one embodiment, the coating assembly further includes:

[0012] A first power component is disposed on the base, and its output shaft is drivenly connected to the printing roller via a coupling. The first power component is used to drive the printing roller to rotate about its own axial direction.

[0013] A connector is provided on the base and is detachably and rotatably connected to the printing roller.

[0014] In one embodiment, the connector includes:

[0015] A fixed semi-ring bearing housing is provided on the base; and

[0016] A movable semi-ring bearing housing, one end of which is movably disposed at one end of a fixed semi-ring bearing housing, and the other end of which is detachably connected to the other end of the fixed semi-ring bearing housing to clamp or release the printing roller.

[0017] In one embodiment, the printing roller is configured as a gravure roller or a micro-gravure roller.

[0018] In one embodiment, each of the coating components includes two printing rollers that rotate in opposite directions and are used to coat the electrode sheet on both sides.

[0019] In one embodiment, the drying chamber is provided with multiple drying channels, which are arranged in parallel and spaced apart. The inlet and outlet positions of two adjacent drying channels are opposite and connected.

[0020] In one embodiment, the coating apparatus further includes:

[0021] A correction component is provided at the outlet of each of the drying channels, and the correction component is used to correct the position of the electrode.

[0022] In one embodiment, the correction component includes:

[0023] A mounting base is provided on the base;

[0024] Two straightening rollers are arranged parallel to each other and spaced apart, and are provided on the mounting base.

[0025] A drive unit, disposed on the base and velocally connected to the mounting base, is used to drive the mounting base to rotate the alignment roller relative to the base; and

[0026] A detection element is disposed on the base, and the detection element is used to detect the position of the edge of the electrode.

[0027] In one embodiment, the driving unit includes:

[0028] The second power component is located on the base and is drivenly connected to one end of the mounting base;

[0029] A guide plate, disposed on the base, is inclined relative to the axial direction of the straightening roller; and

[0030] The slider is slidably disposed on the guide plate, and the other end of the mounting base is rotatably connected to the slider.

[0031] In one embodiment, the surface of the alignment roller is recessed with a connecting path for airflow.

[0032] The technical solution of this utility model embodiment includes a coating equipment comprising a base, coating components, a drying chamber, an unwinding roller, and a winding roller. Multiple coating components are mounted on the base and used to apply multi-layer coatings to the electrode sheet. Each coating component includes a printing roller, which is detachably and rotatably connected to the base. The drying chamber is located on the base and is used to dry the electrode sheet coated by any of the coating components. The unwinding roller is located on the base, with one end of the electrode sheet attached to it. The winding roller is located on the base, with the other end of the electrode sheet attached to it, and is used to wind up the electrode sheet dried in the drying chamber. Compared to existing coating equipment where the printing roller is fixed to the base, this utility model's technical solution allows the printing roller to be detachably and rotatably connected to the base. This ensures that the printing roller can rotate relative to the base to coat the electrode sheet while facilitating the installation and removal of the printing roller, allowing for the replacement of the appropriate printing roller according to the electrode material or specifications. This enables quick roller replacement, thereby improving the flexibility of the coating equipment. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the structure of an embodiment of the coating equipment provided by this utility model;

[0035] Figure 2 A schematic diagram of another embodiment of the coating equipment provided by this utility model;

[0036] Figure 3 A schematic diagram of another embodiment of the coating equipment provided by this utility model;

[0037] Figure 4 for Figure 1 A schematic diagram of a structure of an embodiment of the intermediate coating assembly;

[0038] Figure 5 for Figure 4 An enlarged view of an embodiment at point A;

[0039] Figure 6 for Figure 1 A schematic diagram of one embodiment of the mid-course correction component.

[0040] Explanation of icon numbers:

[0041] 100. Coating assembly; 110. Printing roller; 111. Gravure roller; 112. Micro-gravure roller; 113. Roller body; 114. Extension shaft; 120. First power component; 121. Coupling; 130. Connecting component; 131. Movable semi-ring bearing seat; 132. Fixed semi-ring bearing seat; 133. Clearance hole; 134. Fastening bolt; 140. Pressure roller;

[0042] 200. Drying oven;

[0043] 310. Unwinding roll; 320. Rewinding roll;

[0044] 400, Correction assembly; 410, Mounting base; 420, Correction roller; 421, Connecting path; 430, Second power component; 440, Slider; 450, Guide plate; 451, First locking tooth; 460, Detection element;

[0045] 500, Electrode.

[0046] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0048] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0049] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0050] Electrodes are critical components in battery manufacturing, and their quality directly affects battery performance and safety. Coating equipment is used to uniformly coat the electrode sheet with a slurry containing a mixture of active materials, conductive agents, and binders to form the electrode. The uniformity and stability of the coating are crucial to the quality of the electrode. Currently, common coating equipment mainly employs roller coating technology. The roller is the core component of the coating equipment, and the pattern on its surface determines the coating thickness and uniformity of the slurry.

[0051] Most existing coating equipment directly fixes the printing roller to the base, making the replacement process complicated or even impossible, thus making the existing coating equipment incompatible with different electrode sheets.

[0052] This invention proposes a coating equipment to enable quick change of coating rollers and improve the flexibility of the coating equipment.

[0053] Please see Figures 1 to 3 In one embodiment, the coating equipment includes a base (not shown), a coating assembly 100, a drying chamber 200, an unwinding roller 310, and a winding roller 320. The coating assembly 100 is disposed on the base, and multiple coating assemblies 100 are provided. The multiple coating assemblies 100 are used to perform multi-layer coating on the electrode sheet 500. Each coating assembly 100 includes a printing roller 110, which is detachably and rotatably connected to the base. The drying chamber 200 is disposed on the base and is used to dry the electrode sheet 500 after it has been coated by any one of the coating assemblies 100. The unwinding roller 310 is disposed on the base, and one end of the electrode sheet 500 is disposed on the unwinding roller 310. The winding roller 320 is disposed on the base, and the other end of the electrode sheet 500 is disposed on the winding roller 320. The winding roller 320 is used to wind up the electrode sheet 500 after it has been dried in the drying chamber 200.

[0054] The base platform provides support and a mounting foundation for the coating equipment. In one embodiment, the base platform includes a support frame and a mounting plate. The mounting plate is used to mount the functional structure of the coating equipment, and the support frame is located at the bottom of the mounting plate to provide support for the mounting plate. Of course, in other embodiments, the base platform may only have a mounting plate or a support frame, etc., and there is no limitation on this.

[0055] The coating assembly 100 is used to coat the electrode 500, and the printing roller 110 is the main structure in the coating assembly 100 for coating the electrode 500. In one embodiment, multiple coating assemblies 100 are provided, and each coating assembly 100 includes at least one printing roller 110. Each printing roller 110 stores coating liquid, so that multiple coating assemblies 100 sequentially coat the electrode 500 to perform multi-layer coating on at least one side of the electrode 500. By performing multi-layer coating on the electrode 500, the total coating thickness required for the electrode 500 is achieved by stacking the thickness of each coating layer. In one embodiment, at least two coating assemblies 100 are provided to achieve at least two layers of coating on the electrode 500. Specifically, three or four coating assemblies 100 can be provided, and the number of coating assemblies 100 can be flexibly set according to the required total coating thickness and the thickness of each coating layer, and is not limited here. In one embodiment, the printing roller 110 includes a roller body 113 and an extension shaft 114. The extension shaft 114 is located at opposite ends of the roller body 113 and is coaxially arranged with the roller body 113. The extension shaft 114 is detachably rotatably connected to the base. Since different printing rollers 110 have different parameters, such as the pattern shape and pattern density of the roller body 113, when it is necessary to replace the printing roller 110, the extension shaft 114 can be removed to achieve quick replacement of the printing roller 110.

[0056] The drying chamber 200 is used to dry the electrode 500 after each coating layer. In one embodiment, multiple coating components 100 are distributed on opposite sides of the drying chamber 200, and each opposite side of the drying chamber 200 has an opening. After the electrode 500 has undergone one coating layer by one coating component 100, it enters the drying chamber 200 through an opening on one side and exits the drying chamber 200 through an opening on the other side, so that another coating component 100 can apply a second coating layer to the electrode 500. This process of drying and coating is repeated sequentially. In this way, cross-contamination between adjacent coating layers is avoided, ensuring that the electrode 500 is dry before each coating layer is applied, and ensuring the thickness stacking of multiple coating layers.

[0057] The unwinding roller 310 is used to fix the uncoated end of the electrode 500, and the take-up roller 320 is used to take up the coated end of the electrode 500. In one embodiment, both the unwinding roller 310 and the take-up roller 320 are rotatably mounted on the base and are connected to a driving member (not shown in the figure). The driving member is used to drive the unwinding roller 310 and the take-up roller 320 to rotate synchronously during the coating process, ensuring that the electrode 500 is always in a taut state during the coating process, thereby ensuring the coating quality. The take-up roller 320 and the unwinding roller 310 can be located on the same side of the drying chamber 200 or on different sides of the drying chamber 200; the driving member can be a motor or a cylinder, etc., and there is no limitation here. In one embodiment, a plurality of guide rollers are provided on opposite sides of the drying chamber 200. The guide rollers are used to guide the electrode sheet 500 from the unwinding roller 310 through the coating assembly 100 and the drying chamber 200 and then to the take-up roller 320. The guide rollers are also used to ensure that the electrode sheet 500 is in a tensioned state during the movement. The number and position of the guide rollers can be flexibly set according to actual needs and are not limited here.

[0058] The technical solution of this utility model embodiment involves setting up a base, a coating assembly 100, a drying chamber 200, an unwinding roller 310, and a winding roller 320 in a coating equipment. The coating assembly 100 is located on the base, and there are multiple coating assemblies 100 for multi-layer coating of the electrode sheet 500. Each coating assembly 100 includes a printing roller 110, which is detachably and rotatably connected to the base. The drying chamber 200 is located on the base and is used to dry the electrode sheet 500 after it has been coated by any one of the coating assemblies 100. The unwinding roller 310 is located on the base, and one end of the electrode sheet 500 is located on the unwinding roller 310. The winding roller 320 is located on the base, and the other end of the electrode sheet 500 is located on the winding roller 320. The winding roller 320 is used to wind up the electrode sheet 500 after it has been dried in the drying chamber 200. Compared to existing coating equipment where the printing roller 110 is fixed to the base, the present invention detachably and rotatably connects the printing roller 110 to the base. This ensures that the printing roller 110 can rotate relative to the base to coat the electrode 500, while also facilitating the installation and removal of the printing roller 110, allowing for replacement with a suitable printing roller 110 based on the material or specifications of the electrode 500. This enables quick replacement of the printing roller 110, thereby improving the operational flexibility of the coating equipment.

[0059] Please see Figure 4 and Figure 5 In one embodiment, the coating assembly 100 further includes a first power member 120 and a connector 130. The first power member 120 is disposed on the base, and the output shaft of the first power member 120 is drivenly connected to the printing roller 110 through a coupling 121. The first power member 120 is used to drive the printing roller 110 to rotate around its own axis. The connector 130 is disposed on the base and is detachably rotatably connected to the printing roller 110.

[0060] In one embodiment, the two extension shafts 114 of the printing roller 110 are detachably connected to the base via a connector 130, and one of the extension shafts 114 is also connected to the output shaft of the first power member 120 via a coupling 121. The power of the first power member 120 is adjustable to change the rotational speed of the printing roller 110, thereby changing the coating thickness. The first power member 120 can be configured as a motor or cylinder, etc., and is not limited thereto. In one embodiment, the coupling 121 and the first power member 120 are located on one side of the base, and the printing roller 110 and the connector 130 are located on the other side of the base. The extension shaft 114 of the printing roller 110 passes through the base to connect with the coupling 121. In one embodiment, each connector 130 is mounted on the base via a bracket, and the connector 130 is detachably rotatably connected to the extension shaft 114.

[0061] Please see Figure 5 In one embodiment, the connector 130 includes a fixed half-ring bearing seat 132 and a movable half-ring bearing seat 131. The fixed half-ring bearing seat 132 is disposed on the base. One end of the movable half-ring bearing seat 131 is movably disposed at one end of the fixed half-ring bearing seat 132, and the other end of the movable half-ring bearing seat 131 is detachably connected to the other end of the fixed half-ring bearing seat 132 to clamp or release the printing roller 110.

[0062] In one embodiment, a fixed semi-ring bearing seat 132 is provided on a bracket, and one end of a movable semi-ring bearing seat 131 is rotatably connected to one end of a fixed semi-ring bearing seat 132 via a rotating shaft. The other end of the movable semi-ring bearing seat 131 is detachably connected to the other end of a fixed semi-ring bearing seat 132 to clamp or release the extension shaft 114 of the printing roller 110. That is, when the printing roller 110 needs to be replaced, the coupling 121 is opened, and the other end of the movable half-ring bearing seat 131 is separated from the other end of the fixed half-ring bearing seat 132 to release the extension shaft 114 of the original printing roller 110; after the original printing roller 110 is removed, the extension shaft 114 of the other printing roller 110 is placed between the movable half-ring bearing seat 131 and the fixed half-ring bearing seat 132 and extended into the coupling 121; the coupling 121 is closed, and the other end of the movable half-ring bearing seat 131 is connected to the other end of the fixed half-ring bearing seat 132 so that the inner circumferences of the movable half-ring bearing seat 131 and the fixed half-ring bearing seat 132 are tightly fitted with the outer circumference of the extension shaft 114.

[0063] In one embodiment, the connector 130 further includes a fastening bolt 134. The other end of the movable semi-ring bearing seat 131 is provided with a clearance hole 133, and the other end of the fixed semi-ring bearing seat 132 is provided with a threaded hole. The fastening bolt 134 can pass through the clearance hole 133 to be threadedly connected to the threaded hole. The cross-sectional dimension of the clearance hole 133 is smaller than the outer diameter of the head of the fastening bolt 134, so that when the fastening bolt 134 passes through the clearance hole 133 and is threadedly connected to the threaded hole, it can lock the other end of the movable semi-ring bearing seat 131 to the other end of the fixed semi-ring bearing seat 132. In one embodiment, the clearance hole 133 is semi-open, so that when the clearance hole 133 is relatively far from the threaded hole, that is, when the movable half-ring bearing seat 131 is tilted at a certain angle relative to the fixed half-ring bearing seat 132, it can avoid obstructing the installation of the fastening bolt 134, allowing the fastening bolt 134 to still pass through the clearance hole 133 to connect with the threaded hole, thereby increasing the outer diameter range of the extension shaft 114 that can be clamped by the movable half-ring bearing seat 131 and the fixed half-ring bearing seat 132. Of course, in other embodiments, both ends of the fixed half-ring bearing seat 132 and the movable half-ring bearing seat 131 can be detachably connected, which is not limited here.

[0064] The technical solution of this utility model embodiment connects the first power component 120 and the printing roller 110 using a coupling 121. This ensures that the first power component 120 can drive the printing roller 110 to rotate while achieving a detachable connection between the first power component 120 and the printing roller 110. By setting the connecting member 130 as a fixed semi-ring bearing seat 132 and a movable semi-ring bearing seat 131, the printing roller 110 can be clamped or released. This ensures that the printing roller 110 rotates while achieving a detachable connection between the printing roller 110 and the base, thereby ensuring the quick change of the printing roller 110.

[0065] Please see Figures 1 to 3 In one embodiment, the printing roller 110 is configured as a gravure roller 111 or a micro-gravure roller 112.

[0066] Both the gravure roller 111 and the microgravure roller 112 have inwardly recessed patterns on their outer surfaces, which are the same patterns as those on the printing roller 110. These patterns can store coating liquid, facilitating its application to the electrode 500. The rotational speed of either the gravure roller 111 or the microgravure roller 112 is adjustable to accommodate the moving speed of the electrode 500 and to change the coating thickness.

[0067] In one embodiment, each coating assembly 100 has a printing roller 110 configured as a microgravure roller 112. The microgravure roller 112 has a small depth of its weave pattern, enabling extremely thin coating. Furthermore, the microgravure roller 112 has a small outer diameter, resulting in a smaller moment of inertia, allowing for faster and more uniform coating. In one embodiment, the microgravure roller 112 coats the electrode 500 using a kissing coating method, meaning the rotation direction of the microgravure roller 112 is opposite to the movement direction of the electrode 500, and the contact pressure between the microgravure roller 112 and the electrode 500 is very low, allowing the coating liquid to form a very uniform, thin, and smooth coating on the surface of the electrode 500.

[0068] In another embodiment, each coating assembly 100 has a printing roller 110 configured as a gravure roller 111. The gravure roller 111 has a larger depth of the weave pattern, which can store more coating liquid and reduce the feeding frequency. Furthermore, the micro-gravure roller 112 has a larger outer diameter, allowing for various coating thicknesses from thick to thin by adjusting the rotation speed of the gravure roller 111, thus providing strong adaptability. In one embodiment, each coating assembly 100 also includes a pressure roller 140, which is parallel to and opposite to the gravure roller 111. The electrode 500 passes between the pressure roller 140 and the gravure roller 111. The pressure roller 140 ensures that the electrode 500 is in contact with the gravure roller 111 as it passes, so that the gravure roller 111 performs coating by back roller pressing, further improving coating uniformity. Moreover, by adjusting the pressure applied to the electrode 500 by the pressure roller 140, the coating thickness can be further changed.

[0069] In another embodiment, some of the coating components 100 have printing rollers 110 configured as microgravure rollers 112, while other parts of the coating components 100 have printing rollers 110 configured as gravure rollers 111. The microgravure rollers 112 and gravure rollers 111 are used to coat the electrode sheet 500 with different layers. The specific number and position of the microgravure rollers 112 and gravure rollers 111 can be flexibly set according to actual needs, and are not limited here.

[0070] In one embodiment, each coating assembly 100 further includes a coating liquid storage box (not shown in the figure), which is used to replenish the coating liquid in the anilox pattern of the microgravure roller 112 or gravure roller 111. The coating liquid in the anilox pattern of each roller 110 can be of different materials or specifications, and this is not limited. In one embodiment, a coating liquid storage box is provided below each roller 110, and part of the roller 110 is placed in the coating liquid storage box to contact the coating liquid. During the rotation of the roller 110, the coating liquid is carried into the anilox pattern to facilitate coating of the electrode 500. In another embodiment, a coating liquid storage box is located inside the printing roller 110 and communicates with the screen pattern. A movable baffle is provided between the coating liquid storage box and the screen pattern. The movable baffle is located inside the printing roller 110 and is movably connected to both ends of the printing roller 110. The movable baffle can rotate around the axis of the printing roller 110 at a certain angle. The movable baffle is used to isolate or connect the screen pattern and the coating liquid storage box. Multiple movable baffles can be arranged around the axis of the printing roller 110. The movable baffles can be driven by a micro-drive component, which can be a micro-motor or a micro-cylinder, etc., which is not specified here. Of course, in other embodiments, the coating liquid can also be replenished to the screen pattern of the printing roller 110 at regular intervals by manual feeding, etc., which is not limited here.

[0071] The technical solution of this utility model embodiment, by setting the printing roller 110 as a gravure roller 111 or a micro-gravure roller 112, can ensure the uniformity of coating and achieve extremely thin multi-layer coating.

[0072] Please see Figure 1 and Figure 3 In one embodiment, each coating assembly 100 includes two printing rollers 110 rotating in opposite directions, and the two printing rollers 110 are used to coat the electrode 500 on both sides.

[0073] In one embodiment, each coating assembly 100 is used to coat both sides of the electrode 500. The two printing rollers 110 in each coating assembly 100 are both configured as microgravure rollers 112. The two printing rollers 110 are staggered and arranged on the same side of the drying chamber 200, respectively contacting both sides of the electrode 500. The rotation directions of the two printing rollers 110 are opposite and both are opposite to the movement direction of the electrode 500, so as to coat both sides of the electrode 500. In another embodiment, some coating assemblies 100 include only one printing roller 110, configured as a letterpress roller 110, to coat one side of the electrode 500; other coating assemblies 100 include two printing rollers 110, both configured as microgravure rollers 112, to coat both sides of the electrode 500. The number and position of coating components 100 with different configurations can be determined according to actual needs, so as to meet the requirements of different double-sided layer numbers while satisfying the double-layer coating of electrode 500. No restrictions are imposed here.

[0074] The technical solution of this utility model embodiment provides two printing rollers 110 in the coating assembly 100 to simultaneously coat both sides of the electrode sheet 500, and enables multi-layer coating on both sides, thereby improving the coating efficiency and application range of the coating assembly 100.

[0075] Please see Figures 1 to 3 In one embodiment, the drying chamber 200 is provided with a plurality of drying channels, which are arranged in parallel and spaced apart, with the inlet and outlet positions of two adjacent drying channels being opposite and connected.

[0076] In one embodiment, a plurality of drying channels are arranged parallel to each other within the drying chamber 200. The openings on both sides of the drying chamber 200 correspond to the inlets and outlets of the drying channels. The inlets and outlets of two adjacent drying channels are opposite in position and connected. The electrode 500 enters from the inlet of one drying channel and exits from the outlet of that drying channel, then enters another drying channel from the inlet of another adjacent drying channel. The electrode 500 passes through each drying channel in sequence, making the movement path of the electrode 500 in the drying chamber 200 serpentine. The drying channels are equipped with heating tubes, hot air elements, infrared rays, or lasers, etc., to dry the electrode 500; no limitation is made here. In one embodiment, a coating assembly 100 is located at the inlet of the drying channel, so that the electrode 500 is coated with a layer by the coating assembly 100 before entering the drying chamber 200 for drying. In one embodiment, the coating assembly 100 for applying an intermediate layer to the electrode 500 may also be located at the outlet of the coating assembly 100. When a coating assembly 100 is located at the outlet of one drying channel, a coating assembly 100 cannot be located at the inlet of the adjacent drying channel, to ensure that after coating the electrode 500 by any coating assembly 100, the electrode 500 enters the drying channel for drying before proceeding to the next coating step. Of course, in other embodiments, the coating assembly 100 for applying an intermediate layer to the electrode 500 may also be located at the outlet of the coating assembly 100, and the multiple drying channels within the drying chamber 200 may also be interconnected; no limitation is imposed here.

[0077] The technical solution of this utility model embodiment, by setting multiple parallel and spaced drying channels in the drying oven 200, ensures that the electrode 500 can be dried in time after each coating component 100 coating, and can avoid different parts of the electrode 500 from touching each other in the drying oven 200, ensuring that the drying oven 200 can accurately dry the electrode 500, and improving the reliability of the drying oven 200.

[0078] Please see Figures 1 to 3 In one embodiment, the coating apparatus further includes a correction component 400, with a correction component 400 provided at the outlet of each drying channel. The correction component 400 is used to correct the position of the electrode 500.

[0079] In one embodiment, a plurality of correction components 400 are provided, which are located between coatings for two adjacent coating steps of the electrode 500 and between the coating component 100 for the final coating step and the take-up roller 320.

[0080] Please see Figure 6In one embodiment, the correction assembly 400 includes a mounting base 410, a correction roller 420, a drive unit, and a detection unit. The mounting base 410 is disposed on a base; the correction roller 420 is disposed on the mounting base 410, and two correction rollers 420 are arranged in parallel at intervals; the drive unit is disposed on the base and drivenly connected to the mounting base 410, and the drive unit is used to drive the mounting base 410 to rotate the correction roller 420 relative to the base; the detection element 460 is disposed on the base, and the detection element 460 is used to detect the position of the edge of the electrode 500.

[0081] In one embodiment, the mounting base 410 is movably mounted on the base and connected to the drive unit. Two straightening rollers 420 are parallel and spaced apart on the mounting base 410, with both ends of the rollers 420 rotatably connected to the mounting base 410. The two rollers 420 rotate in the same direction and in the same direction as the electrode 500. The electrode 500 passes over the two rollers 420 in sequence, and the rollers 420 contact both sides of the electrode 500. In one embodiment, a detection element 460 is positioned close to the mounting base 410 and near the edge of the electrode 500. The detection element 460 is used to detect the edge position of the electrode 500 in real time to determine whether the electrode 500 has deviated during movement. In one embodiment, two detection elements 460 are provided, spaced apart axially along the rollers 420 and positioned near the two edges of the electrode 500, respectively, to simultaneously detect the two edge positions of the electrode 500 and ensure the reliability of the detection. In one embodiment, the detection element 460 can also be slidably disposed on the base, and can move towards or away from the electrode 500 to accommodate electrodes 500 of different sizes. When coating electrodes 500 of different sizes, the detection element 460 can be moved to a suitable position and then locked to ensure that the detection element 460 can function properly. Of course, in other embodiments, the detection element 460 can also be detachably disposed on the base or fixed to the base; this is not limited here.

[0082] In one embodiment, the detection element 460 is configured as an ultrasonic sensor. The ultrasonic sensor has a receiving surface and can emit ultrasonic waves toward the edge of the electrode 500 and receive the echo reflected from the electrode 500. By comparing the distribution of the echo energy on the receiving surface with a preset distribution, it is determined whether the edge of the electrode 500 deviates from a preset position. When it deviates from the preset position, the drive unit drives the mounting base 410 to rotate a small angle so that the correction roller 420 guides the electrode 500 back to the correct path.

[0083] In another embodiment, the detection element 460 is configured as a photoelectric sensor. The photoelectric sensor has a photosensitive array and can emit light towards the edge of the electrode 500 and receive light reflected from the electrode 500. By detecting the position of the reflected light on the photosensitive array and comparing it with a preset position, or by detecting the intensity of the reflected light and comparing it with a preset light intensity, it determines whether the edge of the electrode 500 deviates from the preset position and in which direction it deviates. When it deviates from the preset position, the drive unit drives the mounting base 410 to rotate a small angle so that the correction roller 420 guides the electrode 500 back to the correct path.

[0084] The technical solution of this utility model embodiment, by setting the correction component 400, can correct the position of the electrode 500 in time before the next coating, ensuring that the position of each coating is completely consistent, thereby ensuring that all coating layers are completely overlapped; it can also correct the electrode 500 before the electrode 500 is wound up, so as to ensure the winding alignment and improve the reliability of the coating equipment.

[0085] Please see Figure 6 In one embodiment, the driving unit includes a second power member 430, a guide plate 450, and a slider 440. The second power member 430 is disposed on the base and drivenly connected to one end of the mounting base 410. The guide plate 450 is disposed on the base and is inclined relative to the axial direction of the correction roller 420. The slider 440 is slidably disposed on the guide plate 450, and the other end of the mounting base 410 is rotatably connected to the slider 440.

[0086] In one embodiment, the mounting base 410 is mounted on a base with the slider 440 at opposite ends of the axial direction of the straightening roller 420 via a second power member 430 and a guide plate 450, respectively. In one embodiment, the side of the slider 440 facing away from the guide plate 450 is rotatably connected to the mounting base 410. The second power member 430 is mounted on the base via a fixing frame (not shown in the figure), and its output shaft is connected to the side of the mounting base 410 facing away from the straightening roller 420, so as to drive the mounting base 410 to rotate and cause the mounting base 410 to move the slider 440 a small distance relative to the guide block. The second power member 430 can be configured as a motor or a cylinder, etc., and is not limited here. In one embodiment, the guide plate 450 is inclined relative to the axis of the straightening roller 420. When the mounting base 410 rotates relative to the slider 440 and drives the slider 440 to move relative to the guide plate 450, the inclination angle of the guide plate 450 relative to the axis of the straightening roller 420 can limit the displacement of the slider 440, thereby limiting the rotation angle of the mounting base 410. The tilt angle of the guide plate 450 can be flexibly set according to the actual required rotation angle range of the mounting base 410, and there is no limitation here.

[0087] In one embodiment, the slider 440 has a protrusion (not shown in the figure) on its edge, and the guide plate 450 has a groove (not shown in the figure) on its edge. The protrusion slides into the groove to restrict the slider 440 to the guide plate 450. In another embodiment, the guide plate 450 has a plurality of first teeth 451 on the side facing the slider 440, and the slider 440 has a second tooth on the side facing the guide plate 450. Each first tooth 451 and each second tooth has a triangular cross-sectional shape, and the tip of the second tooth abuts against the tip of one of the first teeth 451. Under the action of an external force, the slider 440 drives the second tooth to move relative to the first tooth 451; after the external force is removed, the second tooth abuts against another first tooth 451 to restrict the movement of the slider 440. Of course, in other embodiments, a driving structure can be provided between the guide plate 450 and the slider 440 to drive the slider 440 to slide along the guide plate 450. The driving structure can be a motor or a cylinder, etc., and the driving structure can also include a gear and rack structure, etc. There are no limitations here.

[0088] The technical solution of this utility model embodiment, by setting an inclined guide plate 450 and a slider 440 rotatably connected to the mounting base 410, can ensure that the mounting base 410 can rotate relative to the base while limiting the rotation angle of the mounting base 410, ensuring that the mounting base 410 only rotates a small angle, avoiding damage to the electrode 500 due to excessive rotation angle, and improving the reliability of the correction component 400.

[0089] Please see Figure 6 In one embodiment, the surface of the correction roller 420 is recessed with a connecting path 421 for airflow.

[0090] In one embodiment, both straightening rollers 420 are provided with recessed textures. The end of each texture on each straightening roller 420 extends to both ends of the straightening roller 420, and the end of each texture is open to form multiple connecting paths 421. The shape of the connecting paths 421 can be straight, curved, or spiral. The shape of the connecting paths 421 on each straightening roller 420 can be the same or different, and there is no limitation on this.

[0091] The technical solution of this utility model embodiment provides a connecting path 421 on the correction roller 420. On the one hand, when the correction roller 420 is in contact with the electrode 500, the air between the correction roller 420 and the electrode 500 can flow along the connecting path 421 and flow out to the external environment from the end of the connecting path 421, thus avoiding slippage. On the other hand, the connecting path 421 forms a low-friction area, which can help the electrode 500 maintain a flat state. This allows the correction assembly 400 to correct the deviation of the electrode 500 while ensuring the flatness of the electrode 500, thereby improving the reliability of the correction assembly 400.

[0092] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A coating apparatus for coating electrode sheets, characterized in that, include: abutment; A coating assembly is provided on the base. Multiple coating assemblies are provided, and multiple coating assemblies are used to apply multi-layer coating to the electrode sheet. Each coating assembly includes a printing roller, and the printing roller is detachably and rotatably connected to the base. A drying oven, located on the base, is used to dry the electrode sheet after it has been coated by any of the coating components; An unwinding roller is disposed on the base, and one end of the electrode sheet is disposed on the unwinding roller; as well as A take-up roller is provided on the base, and the other end of the electrode sheet is provided on the take-up roller. The take-up roller is used to take up the electrode sheet after it has been dried in the drying box.

2. The coating equipment as described in claim 1, characterized in that, The coating assembly further includes: A first power component, disposed on the base, has its output shaft connected to the printing roller via a coupling. The first power component drives the printing roller to rotate about its own axial direction. A connector is provided on the base and is detachably and rotatably connected to the printing roller.

3. The coating equipment as described in claim 2, characterized in that, The connector includes: A fixed semi-ring bearing housing is provided on the base; and A movable semi-ring bearing housing, one end of which is movably disposed at one end of a fixed semi-ring bearing housing, and the other end of which is detachably connected to the other end of the fixed semi-ring bearing housing to clamp or release the printing roller.

4. The coating equipment as described in claim 1, characterized in that, The printing roller is configured as a gravure roller or a micro-gravure roller.

5. The coating equipment as described in claim 1, characterized in that, Each of the coating components includes two printing rollers that rotate in opposite directions and are used to coat the electrode sheet on both sides.

6. The coating equipment as described in claim 1, characterized in that, The drying chamber is provided with multiple drying channels, which are arranged in parallel and spaced apart. The inlet and outlet positions of two adjacent drying channels are opposite and connected.

7. The coating equipment as described in claim 6, characterized in that, The coating equipment also includes: A correction component is provided at the outlet of each of the drying channels, and the correction component is used to correct the position of the electrode.

8. The coating equipment as described in claim 7, characterized in that, The correction component includes: A mounting base is provided on the base; Two straightening rollers are arranged parallel to each other and spaced apart, and are provided on the mounting base. A drive unit, disposed on the base and velocally connected to the mounting base, is used to drive the mounting base to rotate the alignment roller relative to the base; and A detection element is disposed on the base, and the detection element is used to detect the position of the edge of the electrode.

9. The coating equipment as described in claim 8, characterized in that, The driving unit includes: The second power component is located on the base and is drivenly connected to one end of the mounting base; A guide plate, disposed on the base, is inclined relative to the axial direction of the straightening roller; and The slider is slidably disposed on the guide plate, and the other end of the mounting base is rotatably connected to the slider.

10. The coating equipment as described in claim 8, characterized in that, The surface of the correction roller is recessed with a connecting path for airflow.

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