Coating drying device

Abstract

The utility model relates to a coating drying device which comprises a release roller assembly, a material area smoothing roller assembly and an edge smoothing roller assembly. The release roller assembly is used for reducing stress accumulation in the pole piece; the material area flattening roller assembly is used for pressing down the pole piece to flatten the pole piece; the edge smoothing roller assembly is used for pressing down the edge of the pole piece to flatten the edge of the pole piece; wherein the release roller assembly, the material area smoothing roller assembly and the edge smoothing roller assembly are sequentially arranged in different pole piece processing areas in the pole piece conveying direction, different compression rollers are adopted for sequentially carrying out targeted treatment on the pole piece according to the problems occurring in the different pole piece processing areas, and the problems of stress lines, pole piece rolling, cracking and the like are avoided; and the yield and the production efficiency of the pole piece are improved.

Description

Technical Field

[0001] This application relates to the technical field of lithium battery coating and drying, and in particular to coating and drying apparatus. Background Technology

[0002] Lithium-ion batteries are rechargeable batteries that primarily function by the movement of lithium ions between the positive and negative electrodes. The manufacturing of lithium-ion batteries is a tightly linked process involving a series of interconnected steps, including electrode manufacturing, battery assembly, and final processes such as electrolyte injection, pre-charging, formation, and aging. Each of these three stages can be further divided into several key processes, each significantly impacting the final battery performance. Electrode manufacturing is the core of the entire lithium battery manufacturing process, directly affecting the battery's electrochemical performance.

[0003] The baking and heating process in electrode manufacturing mainly includes the following stages: preheating, accelerated drying, stable drying, and decelerated drying. During the stable drying stage, as the surface solvent evaporates, the solvent deep within the electrode begins to leach out. This stage is prone to uneven heating leading to cracking and localized stress concentration in the material area, which in turn causes uneven surface tension in the coating, resulting in a series of appearance defects, including edge curling, cracking in the material area, and shrinkage stress lines. Foil cracking and breakage severely impact production efficiency, leading to electrode scrap, increased defects, and affecting cell production costs and coating pass rates. Utility Model Content

[0004] Therefore, it is necessary to provide a coating drying device to address issues such as localized stress accumulation, edge curling, and cracking during the electrode drying process.

[0005] 1. In a first aspect, this application provides a coating and drying apparatus, including an oven and a roller conveying mechanism disposed within the oven, the roller conveying mechanism comprising: sequentially arranged along the electrode belt traveling direction:

[0006] The tension release roller assembly is used to reduce stress accumulation inside the electrode sheet;

[0007] The material leveling roller assembly is used to press down the electrode sheets to make them flat.

[0008] Edge smoothing roller assembly is used to press down on the edge of the electrode sheet to make the edge of the electrode sheet flat;

[0009] The tension release roller assembly, the material area smoothing roller assembly, and the edge smoothing roller assembly are either integral or separate structures.

[0010] In one embodiment, the release roller assembly is disposed in the stable drying area of ​​the oven, and the release roller assembly includes:

[0011] The tension release roller is rolled and connected to the first surface of the electrode sheet. The tension release roller has evenly distributed concave and convex textures, which make the tension of the electrode sheet evenly distributed when the electrode sheet passes through the tension release roller.

[0012] In one embodiment, the release roller assembly further includes:

[0013] The tension release roller bracket is disposed opposite to both sides of the electrode sheet and connected to the tension release roller for mounting the tension release roller;

[0014] The tension release roller groove is formed on the tension release roller support along a direction perpendicular to the electrode sheet, and is used to adjust the position of the tension release roller in the vertical direction.

[0015] In one embodiment, the material leveling roller assembly is disposed in the deceleration drying zone of the oven, and the material leveling roller assembly includes:

[0016] The material leveling roller is in rolling contact with the second surface of the electrode sheet;

[0017] The material leveling roller mounting components are positioned opposite each other on both sides of the electrode sheet and are used to install the material leveling rollers.

[0018] In one embodiment, the material leveling roller mounting component includes:

[0019] Material area smoothing roller fixing frame;

[0020] The material leveling roller bracket is connected to both ends of the material leveling roller;

[0021] The material leveling roller adjustment component is connected to the material leveling roller bracket and the material leveling roller fixing frame, and is used to adjust the relative position of the material leveling roller bracket and the electrode sheet.

[0022] In one embodiment, the material leveling roller adjustment component includes:

[0023] The adjusting screw is set on the material area smoothing roller bracket, and the first end of the adjusting screw is connected to the material area smoothing roller fixing frame;

[0024] The handwheel, connected to the second end of the adjusting screw, is used to rotate and adjust the relative position of the material area smoothing roller bracket and the adjusting screw.

[0025] In one embodiment, the material leveling roller adjustment component further includes:

[0026] The material leveling roller groove is set on the material leveling roller support and connected to one end of the material leveling roller. It is used to adjust the position of the material leveling roller in the length direction of the material leveling roller.

[0027] In one embodiment, the edge smoothing roller assembly is disposed in the deceleration drying zone of the oven, and the edge smoothing roller assembly includes:

[0028] A first edge smoothing roller and a second edge smoothing roller are disposed opposite to each other on both sides of the electrode sheet;

[0029] The first edge smoothing roller is tactilely connected to the second surface of the electrode sheet via a first edge smoothing roller bracket;

[0030] The second edge smoothing roller is rolledly connected to the second surface of the electrode sheet via a second edge smoothing roller bracket.

[0031] In one embodiment, the first edge smoothing roller bracket and the second edge smoothing roller are provided with edge smoothing roller grooves in the vertical direction for mounting and adjusting the position of the first edge smoothing roller and the second edge smoothing roller in the vertical direction.

[0032] In one embodiment, the opposite ends of the first edge smoothing roller and the second edge smoothing roller are rounded to form a spherical end.

[0033] The aforementioned coating and drying device arranges the tension release roller assembly, material area smoothing roller assembly, and edge smoothing roller assembly according to the different electrode baking processing areas. This allows the tension release roller assembly, material area smoothing roller assembly, and edge smoothing roller assembly to process the electrode sequentially. The tension release roller assembly reduces the accumulation of local stress caused by uneven force within the electrode, thereby preventing shrinkage stress marks on the electrode. The material area smoothing roller assembly and edge smoothing roller assembly press down and flatten the electrode, improving the stability of the electrode belt and preventing abnormalities such as edge curling and cracking after the electrode baking is completed. Multiple pressure rollers are used to sequentially and specifically treat the electrode to address problems that may occur in different processing areas, improving the electrode yield and production efficiency. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the coating and drying apparatus in some embodiments of this application.

[0036] Figure 2 This is a schematic diagram of the structure of the tension release roller assembly in some embodiments of this application.

[0037] Figure 3 This is a schematic diagram of the material leveling roller assembly in some embodiments of this application.

[0038] Figure 4 This is a plan view of the material leveling roller assembly in some embodiments of this application.

[0039] Figure 5 This is a schematic diagram of the edge smoothing roller assembly in some embodiments of this application.

[0040] Explanation of icon numbers:

[0041] 10. Electrode sheet; 20. Release roller assembly; 202. Release roller; 204. Release roller bracket; 206. Release roller groove; 208. Release roller fastener; 30. Material area smoothing roller assembly; 302. Material area smoothing roller; 304. Material area smoothing roller fixing frame; 306. Material area smoothing roller bracket; 308. Adjusting screw; 310. Handwheel; 312. Material area smoothing roller groove; 314. Guide component; 316. Limiting component; 40. Edge smoothing roller assembly; 402. First edge smoothing roller; 404. Second edge smoothing roller; 406. First edge smoothing roller bracket; 408. Second edge smoothing roller bracket; 410. Edge smoothing roller groove; 412. Edge smoothing roller fastener. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0043] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0048] The applicant noted that the electrode sheet undergoes multiple baking steps during the baking process, including preheating, accelerated drying, stabilizing drying, and decelerating drying. During the stabilizing drying stage, as the surface solvent evaporates, the solvent from deeper layers begins to leach out. This stage is prone to uneven heating leading to cracking and localized stress concentration in the material area, which in turn causes uneven surface tension in the coating, resulting in a series of appearance defects, including edge curling, cracking in the material area, and shrinkage stress lines. Therefore, the problems that arise with the electrode sheet vary depending on the baking step.

[0049] To address the problems in the relevant technologies, firstly, referring to... Figure 1One embodiment of this application provides a coating and drying apparatus, including a tension release roller assembly 20, a material area smoothing roller assembly 30, and an edge smoothing roller assembly 40; the tension release roller assembly 20 is used to reduce stress accumulation inside the electrode sheet 10; the material area smoothing roller assembly 30 is used to press down on the electrode sheet 10 to make the electrode sheet 10 flat; the edge smoothing roller assembly 40 is used to press down on the edge of the electrode sheet 10 to make the edge of the electrode sheet 10 flat; wherein, the tension release roller assembly 20, the material area smoothing roller assembly 30, and the edge smoothing roller assembly 40 are sequentially arranged in different processing areas inside the drying oven along the electrode sheet 10 conveying direction.

[0050] Among them, the tension release roller assembly 20 is used to make the surface tension of the electrode 10 uniform and reduce the local stress accumulation caused by uneven force inside the electrode 10; the material area smoothing roller assembly 30 presses down on the surface of the electrode 10 to make the surface of the electrode 10 flat; the edge smoothing roller assembly 40 presses down to the two sides of the electrode 10 to prevent the edges of the electrode 10 from curling.

[0051] In this embodiment, the tension release roller assembly 20, the material area smoothing roller assembly 30, and the edge smoothing roller assembly 40 are arranged according to different processing areas within the oven. This allows the tension release roller assembly 20, the material area smoothing roller assembly 30, and the edge smoothing roller assembly 40 to process the electrode sheet 10 sequentially. The tension release roller assembly 20 reduces the accumulation of local stress caused by uneven force within the electrode sheet 10, thereby preventing shrinkage stress lines from appearing on the electrode sheet 10. The material area smoothing roller assembly 30 and the edge smoothing roller assembly 40 press down and flatten the electrode sheet 10, improving the stability of the electrode sheet 10's conveyor belt and preventing abnormalities such as edge curling and cracking after the electrode sheet 10 has finished baking. To address the problems that may occur in different processing areas of the electrode sheet 10 within the oven, multiple roller pressing mechanisms are used to sequentially and specifically process the electrode sheet 10, improving the yield and production efficiency of the electrode sheet 10.

[0052] Combination Figure 1 and Figure 2 In some embodiments, the tension release roller assembly 20 is disposed in the stable drying area inside the oven. The tension release roller assembly 20 includes a tension release roller 202, which is tactilely connected to the first surface of the electrode 10. The tension release roller 202 is provided with uniformly distributed concave and convex textures, so that the tension of the electrode 10 is uniformly distributed when the electrode 10 passes through the tension release roller 202.

[0053] The tension release roller assembly 20 also includes a tension release roller bracket 204, which is disposed on both sides of the electrode sheet 10 and is used to install the tension release roller 202. The tension release roller bracket 204 has a tension release roller groove 206 in the vertical direction, which is used to adjust the position of the tension release roller 202 in the vertical direction.

[0054] Specifically, the release roller brackets 204 are respectively disposed on both sides of the electrode 10. After the release roller 202 is installed on the release roller brackets 204, the release roller 202 is perpendicular to the direction of movement of the electrode 10. The release roller brackets 204 have a release roller groove 206 in the vertical direction, and the release roller 202 can be adjusted up and down in the vertical direction within the release roller groove 206. When the release roller 202 is adjusted to a suitable position (such as a position that can reduce uneven tension inside the electrode 10), the release roller 202 is fixed on the release roller brackets 204 by the release roller fasteners 208.

[0055] For example, the release roller 202 is in rolling contact with the first surface of the electrode 10. Through the uneven texture of its surface, the release roller 202, combined with the weight of the electrode 10, applies appropriate compression and friction to the electrode 10 as it advances, thereby achieving a uniform distribution of surface tension and dispersing any previously uneven tension across the entire surface of the electrode 10. Optionally, the uneven texture on the release roller 202 can be a thread.

[0056] In this embodiment, the uneven texture on the surface of the release roller 202 allows for the uniform distribution of tension on the surface of the electrode 10. Because the internal stress of the electrode 10 is evenly distributed, the electrode 10 no longer experiences shrinkage stress marks due to excessive localized stress during subsequent deceleration drying and conveyor belt operation. The release roller groove 206 precisely adjusts the vertical position of the release roller 202 to accommodate electrodes 10 of different thicknesses or drying levels, ensuring that the contact pressure between the release roller 202 and the electrode 10 is optimal, further optimizing the stress distribution effect.

[0057] Reference Figure 1 and Figure 3 In some embodiments, the material leveling roller assembly 30 is disposed in the deceleration drying area inside the oven. The material leveling roller assembly 30 includes a material leveling roller 302 and a material leveling roller mounting component. The material leveling roller 302 is tactilely connected to the second surface of the electrode 10. The material leveling roller mounting component is disposed opposite to both sides of the electrode 10 and is used to mount the material leveling roller 302.

[0058] Specifically, the material leveling roller mounting components are respectively positioned on both sides of the electrode 10. After the material leveling roller 302 is installed, it is perpendicular to the direction of movement of the electrode 10. The material leveling roller 302 makes rolling contact with the second surface of the electrode 10 by pressing down, achieving smooth contact with the surface of the electrode 10. The first surface and the second surface of the electrode 10 are two opposing surfaces.

[0059] For example, after the stable drying stage, the electrode 10 enters the deceleration drying zone. At this time, the solvent on the surface of the electrode 10 has basically evaporated. However, due to the process and temperature changes in the previous stage, there may be local unevenness or minor irregularities on the surface of the electrode 10 caused by internal stress. When the electrode 10 enters the deceleration drying zone, the material leveling roller 302 makes continuous rolling contact with the second surface of the electrode 10. Through the rolling action, the surface of the electrode 10 is pressed down and leveled, eliminating the surface unevenness and minor local bulges caused by the front release roller 202, so that the surface of the electrode 10 reaches an ideal flat state.

[0060] In this embodiment, the even downward pressure of the material leveling roller 302 ensures that the electrode 10 is subjected to uniform force during the conveying process, reducing the risk of belt deviation or belt breakage caused by local unevenness. The material leveling roller mounting parts are symmetrically arranged at both ends of the electrode 10, so that the electrode 10 is subjected to balanced force during the leveling process of the material leveling roller 302, preventing belt deviation or local overpressure problems caused by uneven force on one side.

[0061] Reference Figure 1 , Figure 3 and Figure 4 In some embodiments, the material leveling roller mounting component includes a material leveling roller fixing frame 304, a material leveling roller bracket 306, and a material leveling roller adjusting component; the material leveling roller bracket 306 is connected to both ends of the material leveling roller 302; the material leveling roller adjusting component is connected to the material leveling roller bracket 306 and the material leveling roller fixing frame 304, and is used to adjust the relative position of the material leveling roller bracket 306 and the electrode 10.

[0062] The material leveling roller adjustment component includes an adjusting screw 308, a handwheel 310, and a material leveling roller groove 312. The adjusting screw 308 is mounted on the material leveling roller support 306, and its first end is connected to the material leveling roller fixing frame 304. The handwheel 310 is connected to the second end of the adjusting screw 308 and is used to rotate and adjust the relative position of the material leveling roller support 306 and the adjusting screw 308. The material leveling roller groove 312 is mounted on the material leveling roller support 306 and is connected to one end of the material leveling roller 302 and is used to adjust the relative position of the material leveling roller 302 and the electrode sheet in the length direction of the material leveling roller 302.

[0063] Specifically, taking the material leveling installation on either side as an example, the material leveling roller fixing frame 304 and the material leveling roller bracket 306 are connected by an adjusting screw 308, which passes through the material leveling roller bracket 306. The first end of the adjusting screw 308 is connected to the material leveling roller fixing frame 304, and the second end is connected to the handwheel 310. By rotating the handwheel 310, the adjusting screw 308 is rotated, causing the material leveling roller bracket 306 to move up and down vertically.

[0064] The material leveling roller groove 312 is provided on one side, and it is connected to the material leveling roller bracket 306 on either side. Since the position of the material leveling roller bracket 306 is adjusted individually from both sides, after adjusting the vertical position of one side's material leveling roller bracket 306, the material leveling roller 302 will tilt. When adjusting the position of the other side's material leveling roller bracket 306 at this time, misalignment and jamming may easily occur. In this situation, by loosening the connection between the material leveling roller groove 312 and the material leveling roller 302, the position of the material leveling roller 302 along its length can be adjusted, allowing the other side's material leveling roller bracket 306 to be freely adjusted.

[0065] Optionally, the material leveling roller mounting component also includes a limiting member 316 and a guide member 314. The limiting member 316 is disposed between the adjusting screw 308 and the handwheel 310 to prevent the material leveling roller bracket 306 from disengaging from the screw. The guide member 314 is mounted parallel to the adjusting screw 308 on the material leveling roller fixing frame 304, passes through the material leveling roller bracket 306, and its other end is connected to the limiting member 316 to prevent the material leveling roller bracket 306 from rotating horizontally during adjustment.

[0066] In this embodiment, by adjusting the relative position between the material area smoothing roller support 306 and the electrode 10, it can be ensured that the electrode 10 is subjected to uniform downward pressure during the deceleration drying stage, eliminating local unevenness, improving the overall flatness of the electrode 10, and enhancing the belt running stability.

[0067] Reference Figure 1 and Figure 5 In some embodiments, the edge smoothing roller assembly 40 is disposed in the deceleration drying area inside the oven. The edge smoothing roller assembly 40 includes a first edge smoothing roller 402, a second edge smoothing roller 404, a first edge smoothing roller 402 support, and a second edge smoothing roller 404 support. The first edge smoothing roller 402 and the first edge smoothing roller 402 support are connected, and the second edge smoothing roller 404 and the second edge smoothing roller 404 support are connected and disposed opposite to each other on both sides of the electrode sheet 10.

[0068] The first edge smoothing roller 402 bracket and the second edge smoothing roller 404 are provided with edge smoothing roller grooves 410 in the vertical direction for installing and adjusting the position of the first edge smoothing roller 402 and the second edge smoothing roller 404 in the vertical direction.

[0069] Specifically, the first edge smoothing roller 402 bracket and the second edge smoothing roller 404 bracket are respectively disposed on both sides of the electrode 10. The first edge smoothing roller 402 is connected to the first edge smoothing roller 402 bracket, and the second edge smoothing roller 404 is connected to the second edge smoothing roller 404 bracket, so that the first edge smoothing roller 402 and the second edge smoothing roller 404 are perpendicular to the movement direction of the electrode 10. The first edge smoothing roller 402 and the second edge smoothing roller 404 respectively press down on both sides of the electrode 10. The first edge smoothing roller 402 bracket and the second edge smoothing roller 404 bracket are provided with edge smoothing roller grooves 410 in the vertical direction, and the first edge smoothing roller 402 and the second edge smoothing roller 404 can be adjusted up and down in the vertical direction within the edge smoothing roller grooves 410. When the first edge smoothing roller 402 and the second edge smoothing roller 404 are adjusted to the appropriate position, the first edge smoothing roller 402 and the second edge smoothing roller 404 are respectively fixed on the first edge smoothing roller 402 bracket and the second edge smoothing roller 404 bracket by the edge smoothing roller fastener 412.

[0070] Furthermore, the opposite ends of the first edge smoothing roller 402 and the second edge smoothing roller 404 are rounded to form spherical ends, which helps to provide a gentler contact during the edge smoothing process and reduce the risk of mechanical damage to the edge of the electrode 10.

[0071] In this embodiment, the edge smoothing roller assembly 40 is set in the deceleration drying area, which can apply uniform pressure to both sides of the electrode 10. The first edge smoothing roller 402 support and the second edge smoothing roller 404 support are provided with vertical grooves, so that the edge smoothing roller can be precisely adjusted in height, thereby better adapting to different electrode thicknesses and process conditions. In the deceleration drying stage, the electrode 10 is pressed down to the edge area of ​​the electrode 10 by the edge smoothing roller before it leaves the oven, preventing abnormal cracking caused by edge curling before the electrode 10 leaves the oven.

[0072] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A coating and drying apparatus, comprising an oven, characterized in that, It also includes a roller-passing mechanism disposed within the oven, the roller-passing mechanism comprising: sequentially arranged along the electrode belt traveling direction: The tension release roller assembly, the material area smoothing roller assembly, and the edge smoothing roller assembly are either integral or separate structures.

2. The coating and drying apparatus according to claim 1, characterized in that, The tension release roller assembly includes: The tension release roller is tactilely connected to the first surface of the electrode sheet, and the tension release roller is provided with uniformly distributed concave and convex textures.

3. The coating and drying apparatus according to claim 2, characterized in that, The tension release roller assembly also includes: The tension release roller support is disposed opposite to both sides of the electrode sheet and connected to the tension release roller; The tension release roller groove is formed on the tension release roller support along a direction perpendicular to the electrode sheet.

4. The coating and drying apparatus according to claim 1, characterized in that, The material leveling roller assembly includes: The material leveling roller is in rolling contact with the second surface of the electrode sheet; The material leveling roller mounting components are arranged opposite to each other on both sides of the electrode sheet and connected to the material leveling roller.

5. The coating and drying apparatus according to claim 4, characterized in that, The material leveling roller mounting component includes: Material area smoothing roller fixing frame; A material leveling roller bracket is connected to both ends of the material leveling roller; The material leveling roller adjustment component is connected to the material leveling roller bracket and the material leveling roller fixing frame, and is used to adjust the relative position of the material leveling roller bracket and the electrode sheet.

6. The coating and drying apparatus according to claim 5, characterized in that, The material leveling roller adjustment component includes: An adjusting screw is mounted on the material area smoothing roller bracket, and the first end of the adjusting screw is connected to the material area smoothing roller fixing frame. The handwheel, connected to the second end of the adjusting screw, is used to rotate and adjust the relative position of the material area smoothing roller bracket and the adjusting screw.

7. The coating and drying apparatus according to claim 5, characterized in that, The material leveling roller adjustment component also includes: A material leveling roller groove is provided on the material leveling roller support and connected to one end of the material leveling roller, and is used to adjust the position of the material leveling roller in the length direction of the material leveling roller.

8. The coating and drying apparatus according to claim 1, characterized in that, The edge smoothing roller assembly includes: A first edge smoothing roller and a second edge smoothing roller are disposed opposite to each other on both sides of the electrode sheet; The first edge smoothing roller is tactilely connected to the second surface of the electrode sheet via a first edge smoothing roller bracket; The second edge smoothing roller is rolledly connected to the second surface of the electrode sheet via a second edge smoothing roller bracket.

9. The coating and drying apparatus according to claim 8, characterized in that, The first edge smoothing roller bracket and the second edge smoothing roller are provided with edge smoothing roller grooves in the vertical direction for installing and adjusting the position of the first edge smoothing roller and the second edge smoothing roller in the vertical direction.

10. The coating and drying apparatus according to claim 8, characterized in that, The opposite ends of the first edge smoothing roller and the second edge smoothing roller are rounded to form spherical ends.

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