Foil drying adjusting device and foil drying adjusting method

Abstract

The invention relates to the technical field of electrode foils, and provides a dried foil adjusting device and a dried foil adjusting method. The foil drying adjusting device comprises at least one adjusting roller set, and each adjusting roller set comprises a first roller body, a second roller body and a driving part. The first roller body is provided with an annular curved surface protruding part. The second roller body and the first roller body are oppositely arranged, an annular curved surface concave part is arranged on the second roller body, and the annular curved surface convex part of the first roller body and the annular curved surface concave part of the second roller body are correspondingly embedded so as to roll the foil. The driving part is connected with at least one of the first roller body and the second roller body, and the driving part is used for adjusting the pressing force between the first roller body and the second roller body. Friction structures are arranged at the two ends of the first roller body and / or the two ends of the second roller body correspondingly so that friction of the adjusting roller set to the edge of the foil can be increased. By means of the foil drying adjusting device, the problems of deformation and conveying deviation after foil drying can be effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrode foil, in particular to a drying foil adjusting device and a drying foil adjusting method. BACKGROUND

[0002] Aluminum powder sintered anode foil is a preparation technology of a high-performance aluminum electrolytic capacitor anode foil. The advantage of the technology is that the specific capacitance of the electrolytic capacitor can be significantly improved. It is prepared by coating an aluminum powder slurry on an aluminum base material to form a coating layer, and then drying, sintering and forming. The sintered aluminum powder forms a porous layer to obtain a large specific surface area, thereby obtaining the characteristics of high specific capacitance. However, after the foil is dried, the temperature drops sharply (from 70°C to 25°C), and due to the difference in the thermal expansion coefficients of the aluminum base material and the coating layer, complex stress is generated at the interface between the aluminum base material and the coating layer. Not only will it cause the foil to deviate during transportation, but it may also cause the edge of the foil to bend irreversibly, or even tear, which seriously affects the production efficiency of the foil and the performance of the product. SUMMARY

[0003] Therefore, it is necessary to provide a drying foil adjusting device and a drying foil adjusting method that can avoid deformation and deviation of the foil after drying.

[0004] In a first aspect, the present application provides a drying foil adjusting device, which comprises at least one adjusting roller set, and the adjusting roller set comprises:

[0005] a first roller body, wherein a ring-shaped curved protruding portion is arranged on the first roller body;

[0006] a second roller body, wherein the second roller body is arranged opposite to the first roller body, a ring-shaped curved recessed portion is arranged on the second roller body, and the ring-shaped curved protruding portion of the first roller body is correspondingly embedded in the ring-shaped curved recessed portion of the second roller body to roll the foil; and

[0007] a driving member, wherein the driving member is connected to at least one of the first roller body and the second roller body, and the driving member is used to adjust the pressing force between the first roller body and the second roller body;

[0008] wherein the two ends of the first roller body and / or the two ends of the second roller body are respectively provided with a friction structure to increase the friction of the adjusting roller set on the edge of the foil.

[0009] In some embodiments, the adjusting roller set further comprises a temperature controller connected to the first roller body and / or the second roller body to adjust the temperature of the first roller body and / or the second roller body.

[0010] In some embodiments, the drying foil adjusting device comprises at least two adjusting roller sets arranged in sequence along the conveying direction of the foil, and the temperature of the adjusting roller sets gradually decreases along the conveying direction of the foil.

[0011] In some embodiments, a cavity is provided inside the first roller body and / or the second roller body, and a temperature controller is circulatedly connected to the cavity. The temperature controller is used to introduce heat transfer fluid into the cavity.

[0012] In some embodiments, the friction structure includes a layer of friction material or a friction texture disposed on a first roller and / or a second roller.

[0013] And / or, the total width of the friction structure on the first roller and / or the total width of the friction structure on the second roller are each independently 20% to 30% of the width of the foil.

[0014] In some embodiments, the foil drying adjustment device includes at least two adjustment roller groups, with the height of the annular curved protrusions in each adjustment roller group gradually decreasing along the foil conveying direction.

[0015] In some embodiments, the height of the annular curved protrusion is 25mm to 30mm.

[0016] And / or, the depth of the concave portion of the annular curved surface is 25mm~30mm.

[0017] Secondly, this application provides a method for adjusting the drying of foil, which uses the drying foil adjusting device as described in the first aspect to adjust the drying of foil, including:

[0018] The foil material output from the dryer is conveyed to the adjusting roller group. The annular curved protrusion of the first roller body and the annular curved concave part of the second roller body are correspondingly fitted together. The pressing force between the first roller body and the second roller body is adjusted by the driving component to roll the foil material.

[0019] In some embodiments, the method for conditioning the drying foil satisfies at least one of the following conditions:

[0020] (1) The pressing force between the first roller and the second roller is 10N~20N;

[0021] (2) The tension of the foil is 70N~80N.

[0022] In some embodiments, the foil drying adjustment device includes at least two adjustment roller groups arranged sequentially along the foil conveying direction, the temperature of the adjustment roller groups decreasing step by step along the foil conveying direction, and the temperature difference between two adjacent adjustment roller groups being 5°C to 15°C.

[0023] Compared with traditional technologies, this application has at least the following beneficial effects:

[0024] This application employs a first roller with an annular curved protrusion and a second roller with an annular curved concave portion. The first and second rollers cooperate to roll and press the foil, releasing the internal stress caused by cooling. Simultaneously, a friction structure is incorporated into the adjusting roller assembly. This not only increases friction to prevent foil misalignment but also further resists stress deformation at the edges. Working in conjunction with the annular curved protrusion and concave portion, this effectively prevents foil deformation and maintains foil flatness, thereby improving foil product quality and processing efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the first and second roller bodies in the non-pressed state of the adjusting roller group provided in one embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the pressing state of the first and second roller bodies in the adjusting roller group provided in one embodiment of this application;

[0027] Figure 3 This is a photograph of the adjusted foil material in Embodiment 1 of this application;

[0028] Figure 4 This is a photograph of the adjusted foil material in Comparative Example 1 of this application.

[0029] Among them, 100-adjusting roller group; 110-first roller body; 120-second roller body; 130-driving component; 140-friction structure; 150-temperature controller. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the embodiments and examples. These embodiments and examples are only for illustrating the present application and are not intended to limit the scope of the present application. The purpose of providing these embodiments and examples is to make the disclosure of the present application more thorough and comprehensive. It should also be understood that the present application can be implemented in many different forms and is not limited to the embodiments and examples described herein. Those skilled in the art can make various modifications or alterations without departing from the spirit of the present application, and the equivalent forms obtained also fall within the protection scope of the present application. In addition, numerous specific details are set forth in the following description to provide a fuller understanding of the present application. It should be understood that the present application can be implemented without one or more of these details.

[0031] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0032] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "fixed," and "set" 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. Those skilled in the art can understand the meaning of the above terms in this application according to the specific circumstances.

[0033] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or quantity, nor should they be construed as implicitly specifying the importance or quantity of the indicated technical features. Furthermore, "first," "second," etc., serve only a non-exhaustive enumeration purpose and should be understood as not constituting a closed limitation on quantity. In this application, "optionally," "optionally," and "optional" mean that something is optional, that is, selected from either "with" or "without" parallel solutions. If multiple "optional" statements appear in a technical solution, unless otherwise specified and without contradiction or mutual constraint, each "optional" statement is independent.

[0034] Traditional techniques rely on patterned structures on the regulating rollers to increase friction between the foil and the rollers, thus preventing foil misalignment. However, the dried anode foil has a layered structure, and the difference in thermal expansion coefficients between the coating layer and the substrate layer easily generates complex stresses at the interlayer interface. This can lead to edge warping and internal bending of the foil, reducing the contact area between the foil and the regulating rollers and still posing a risk of misalignment. Significant misalignment necessitates machine shutdown for manual adjustment, severely impacting foil processing efficiency. While higher conveying tension can increase the contact area between the foil and the regulating rollers to reduce misalignment, excessive tension during conveying can cause internal bending and edge warping that is difficult to recover, significantly affecting foil quality.

[0035] Based on this, the first aspect of this application provides a drying foil adjusting device, which includes at least one adjusting roller group, such as... Figure 1 and Figure 2As shown, the regulating roller group 100 includes a first roller body 110, a second roller body 120, and a drive member 130.

[0036] The first roller 110 has an annular curved protrusion. The second roller 120 is disposed opposite to the first roller 110 and has an annular curved concave portion. The annular curved protrusion of the first roller 110 and the annular curved concave portion of the second roller 120 are correspondingly engaged to roll the foil. A driving member 130 is connected to at least one of the first roller 110 and the second roller 120, and the driving member 130 is used to adjust the pressing force between the first roller 110 and the second roller 120.

[0037] The first roller 110 and / or the second roller 120 are respectively provided with friction structures 140 to increase the friction of the adjusting roller group 100 on the edge of the foil.

[0038] This application employs a first roller 110 with an annular curved protrusion and a second roller 120 with an annular curved concave portion. The first roller 110 and the second roller 120 cooperate to roll the foil, releasing the internal stress caused by cooling. Simultaneously, a friction structure 140 is provided in the adjusting roller group 100, which not only prevents foil misalignment by increasing friction but also further resists stress deformation at the edges. Working in conjunction with the annular curved protrusion and the annular curved concave portion, it effectively prevents foil deformation and maintains foil flatness, thereby improving foil product quality and processing efficiency.

[0039] Specifically, the first roller 110 and the second roller 120 of this application utilize the annular curved surface protrusion and the annular curved surface concave portion to roll and press the central area of ​​the foil, thereby applying multi-directional force to the central area of ​​the foil, effectively releasing the internal stress of the foil, preventing the foil from bending internally, and improving the flatness of the foil. At the same time, using the friction structure 140 provided at the edge in the adjusting roller group 100, under the mutual pressing action of the first roller 110 and the second roller 120, the foil displacement caused by the internal stress of the foil is effectively resisted, and the stress release of the foil edge under rolling is offset by the friction force, effectively preventing edge warping deformation.

[0040] It is understood that, in this application, the annular curved protrusion refers to an annular protrusion structure formed on the first roller 110, with the side of the protrusion in contact with the foil being curved. For example, the edge of the annular curved protrusion in the longitudinal section of the first roller 110 can be parabolic or arc-shaped. The annular protrusion structure can be integral with the first roller 110 or a separate structure. Similarly, the annular curved concave portion refers to an annular concave structure formed on the second roller 120, with the side of the concave portion in contact with the foil being curved.

[0041] In some embodiments, the drive member 130 may be a telescopic cylinder, which drives the first roller 110 or the second roller 120 to adjust the pressing force between them.

[0042] In some embodiments, such as Figure 1 As shown, the regulating roller assembly 100 also includes a temperature controller 150, which is connected to the first roller body 110 and / or the second roller body 120 to regulate the temperature of the first roller body 110 and / or the second roller body 120. By providing a temperature controller 150 on the regulating roller assembly 100 to regulate the temperature of the first roller body 110 or the second roller body 120, this application can further reduce foil bending and edge curling caused by instantaneous cooling of the foil, thereby improving the surface flatness of the foil.

[0043] In some embodiments, the foil drying adjustment device includes at least two adjusting roller groups 100 arranged sequentially along the foil conveying direction, and the temperature of the adjusting roller groups 100 gradually decreases along the foil conveying direction. This application achieves gradient cooling of the foil by providing multiple adjusting roller groups 100, ensuring gradual release of foil stress and further reducing deformation caused by stress release.

[0044] In some embodiments, a cavity is provided within the first roller 110 and / or the second roller 120, and a temperature controller 150 is circulatedly connected to the cavity. The temperature controller 150 is used to introduce heat transfer fluid into the cavity. Optionally, the cavity can be a circulating channel provided within the first roller 110 or the second roller 120. The temperature controller 150 heats or cools the heat transfer fluid to stabilize the temperature of the heat transfer fluid flowing into the circulating channel. The connection between the temperature controller 150 and the circulating channel can be a rotary joint, thereby ensuring sealing without hindering the rotation of the rollers.

[0045] In some embodiments, such as Figure 1 As shown, the friction structure 140 includes a friction material layer or friction texture disposed on the first roller 110 and / or the second roller 120. It is understood that the friction structure 140 is only used to increase the friction between the foil and the rollers to prevent the foil from shifting, and damage to the surface of the foil edge should be avoided during the pressing process of the first roller 110 and the second roller 120. Optionally, the friction texture can be a grid texture or a stripe texture, etc. Optionally, the friction material layer can be a rubber material, etc.

[0046] In some embodiments, the total width of the friction structure 140 on the first roller 110 and / or the total width of the friction structure 140 on the second roller 120 are each independently 20% to 30% of the width of the foil, for example, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, or 30%. The total width of the friction structure 140 refers to the sum of the widths of the friction structures 140 at the two ends of the first roller 110 or the second roller 120. Width refers to the dimension of the area of ​​the first roller 110 or the second roller 120 where the friction structure 140 is located in the axial direction of the first roller 110 or the second roller 120.

[0047] Since the first roller 110 and the second roller 120 press against each other in this application, by selecting the width of the friction structure 140 as described above, it can not only resist foil offset but also roll flatten the edge area, effectively avoiding the problem of edge lifting. If the width of the friction structure 140 is relatively large, during the pressing process of the first roller 110 and the second roller 120, slight offset may occur due to the release of foil stress or relative friction between the foil and the friction structure 140, resulting in the friction structure 140 scratching the foil.

[0048] In some embodiments, the drying foil adjusting device includes at least two adjusting roller groups 100, and the height of the annular curved protrusions in each adjusting roller group 100 gradually decreases along the foil conveying direction. This application, by setting adjusting roller groups 100 with progressively decreasing heights of the annular curved protrusions, utilizes adjusting roller groups 100 with lower annular curved protrusion heights to restore the flatness of the foil, thereby avoiding foil deformation and in-plane bending problems after a single rolling process.

[0049] In some embodiments, such as Figure 1 As shown, the height 'a' of the annular curved surface protrusion is 25mm~30mm, for example, it can be 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm. And / or, the depth 'b' of the annular curved surface concave portion is 25mm~30mm, for example, it can be 25mm, 26mm, 27mm, 28mm, 29mm, or 30mm. It is understood that the width of the annular curved surface protrusion and the width of the annular curved surface concave portion can be selected according to the width of the foil material, as long as the annular curved surface protrusion and the annular curved surface concave portion can cover the width of the foil material. For example, the width of the foil material can be 500mm~520mm.

[0050] The dimensions of the annular curved surface protrusion and concave portion are selected as described above to ensure that the foil remains within a recoverable bending range, thereby effectively preventing internal bending deformation of the foil caused by the mutual pressing of the annular curved surface protrusion and concave portion during the pressing process. If the height of the annular curved surface protrusion is too large, the excessive protrusion may cause irreversible deformation of the foil during the pressing process, affecting the quality of the foil.

[0051] The second aspect of this application provides a method for adjusting the drying of foil, which employs the foil adjusting device as described in the first aspect. The method includes:

[0052] The foil material output from the dryer is conveyed to the adjusting roller group 100. The annular curved protrusion of the first roller 110 is correspondingly fitted with the annular curved concave part of the second roller 120. The pressing force between the first roller 110 and the second roller 120 is adjusted by the driving member 130 to roll the foil material.

[0053] In some embodiments, the pressing force between the first roller 110 and the second roller 120 is 10N to 20N, for example, it can be 10N, 11N, 12N, 13N, 14N, 15N, 16N, 17N, 18N, 19N, or 20N. The pressing force selected above between the first roller 110 and the second roller 120 in this application avoids damage to the foil material while, in conjunction with the friction structure 140, preventing foil material displacement and ensuring stress release within the foil material.

[0054] In some embodiments, the tension of the foil is 70N~80N, for example, it can be 70N, 71N, 72N, 73N, 74N, 75N, 76N, 77N, 78N, 79N or 80N.

[0055] In some embodiments, the foil drying adjustment device includes at least two adjustment roller groups 100 arranged sequentially along the foil conveying direction, and the temperature of the adjustment roller groups 100 decreases step by step along the foil conveying direction.

[0056] Optionally, the temperature difference between two adjacent adjusting roller groups 100 is 5℃ to 15℃, for example, it can be 5℃, 6℃, 7℃, 8℃, 9℃, 10℃, 11℃, 12℃, 13℃, 14℃ or 15℃. By selecting the temperature difference between the adjusting roller groups 100 as described above, this application achieves gradient cooling of the foil during the adjustment process, ensuring the step-by-step release of internal stress in the foil, and further preventing foil displacement and deformation.

[0057] The embodiments of this application will be described in detail below with reference to examples. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. For experimental methods in the following embodiments where specific conditions are not specified, please refer to the guidelines given in this application, or follow experimental manuals or conventional conditions in the art, or follow the conditions recommended by the manufacturer, or refer to experimental methods known in the art.

[0058] Example 1

[0059] This embodiment provides a drying foil adjusting device, including three adjusting roller groups 100 arranged sequentially. The adjusting roller groups 100 adopt the following... Figure 1 The diagram shows a first roller 110 and a second roller 120, with a drive component 130 adjusting the pressing force between them. The first roller 110 has an annular curved protrusion with a height of 25mm and a width equal to the width of the foil (500mm). The second roller 120 has an annular curved concave portion whose dimensions match those of the first roller 110. Both ends of the first and second rollers are provided with friction structures 140. The total width of the friction structures 140 on both rollers is 100mm, with one end having a width of 50mm. The friction structures 140 are striped patterns spaced 5mm apart.

[0060] The above-mentioned foil adjustment device is used to adjust the foil output from the dryer, including:

[0061] The foil material, with a temperature of approximately 70°C after being discharged from the dryer, is sequentially conveyed to each adjusting roller group 100. In the adjusting roller group 100, the first roller 110 and the second roller 120 apply a pressure of 15N to the foil material under the action of the drive member 130, and the tension of the foil material during the conveying process is 70N.

[0062] Example 2

[0063] The foil output from the dryer is adjusted using the foil adjustment device in Example 1. The difference is that each adjustment roller group 100 is also equipped with a temperature controller 150. The temperatures of the adjustment roller group 100 along the foil conveying direction are 60°C, 50°C and 40°C respectively.

[0064] Comparative Example 1

[0065] The foil output from the dryer is adjusted using the foil adjustment device in Example 1. The difference is that the first roller 110 and the second roller 120 in the adjustment roller group 100 are both replaced with smooth rollers with a diameter of 150 mm.

[0066] Comparative Example 2

[0067] The foil output from the dryer is adjusted using the foil adjustment device in Example 1. The difference is that the first roller 110 and the second roller 120 in the adjustment roller group 100 are both replaced with rollers with a diameter of 150 mm and a friction structure 140 on the surface.

[0068] Comparative Example 3

[0069] The foil output from the dryer is adjusted using the foil adjustment device in Example 1. The difference is that the first roller 110 and the second roller 120 in the adjustment roller group 100 are replaced with rollers with friction structures 140 on the edge and a diameter of 150mm.

[0070] Comparative Example 4

[0071] The foil material output from the dryer is adjusted using the foil material adjustment device in Example 1. The difference is that the friction structure 140 at the edge of the first roller 110 and the second roller 120 in the adjustment roller group 100 is replaced with a smooth structure.

[0072] The foil materials obtained from the above embodiments and comparative examples were subjected to quality testing, and the testing methods included:

[0073] Offset detection: Using the above method, continuously adjust 100m of foil, test the offset distance of the center point of the foil at the winding point, and observe the amount of edge curling.

[0074] Table 1

[0075]

[0076] Note: When the offset distance is ≥7mm, it will exceed the adjustment capacity of the web guiding machine as the foil is fed, and the offset distance will gradually increase, making it impossible to meet the winding requirements.

[0077] Compared with Examples 1-2 and Comparative Examples 1-4, it can be seen that the foil drying adjustment device of this application can effectively avoid edge warping and conveying deviation caused by stress release after foil drying.

[0078] Compared with Comparative Example 1, and in combination with Example 1, Example 1 is a comparison of Example 1 and Comparative Figure 3 and Figure 4 It can be seen that after adjustment, the foil edge in this application is basically free of warping, while the foil edge in Comparative Example 1 warps severely after adjustment. The reason is that Comparative Example 1 uses a traditional smooth roller for adjustment. After the foil temperature drops, the stress is released, causing the foil to shift significantly. Moreover, the foil will warp more edges and deform internally due to stress release, and there may even be edge tearing.

[0079] Compared with Comparative Example 2, Example 1 shows that although Comparative Example 2 uses a friction roller to increase the friction of the foil and thus reduce foil offset, the friction roller cannot effectively release the internal stress of the foil, and the problem of edge lifting still exists, and there are many scratches on the foil surface. Furthermore, compared with Comparative Example 3, it can be seen that using only a roller with a friction structure 140 on the edge can reduce foil offset, but it still cannot effectively release stress, and the problem of edge lifting still exists, and even edge tearing occurs.

[0080] Compared with Comparative Example 4, Example 1 shows that Comparative Example 4 did not provide the friction structure 140 at the edges of the first roller 110 and the second roller 120, resulting in foil misalignment and an increase in the number of edge lift-offs. This further demonstrates that the edge friction structure 140 can further improve foil stress release and reduce foil misalignment.

[0081] In summary, this application employs a first roller 110 with an annular curved protrusion and a second roller 120 with an annular curved concave portion. The first roller 110 and the second roller 120 cooperate to roll the foil, releasing the internal stress caused by cooling. Simultaneously, a friction structure 140 is provided in the adjusting roller group 100. This not only increases friction to prevent foil misalignment but also further resists stress deformation at the edges. Working in conjunction with the annular curved protrusion and the annular curved concave portion, it effectively prevents foil deformation and maintains foil flatness, thereby improving foil product quality and processing efficiency.

[0082] 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.

[0083] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the 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 modifications and improvements all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A device for adjusting the temperature of a drying foil, characterized in that, The drying foil adjusting device includes at least one adjusting roller group, the adjusting roller group comprising: A first roller body, wherein an annular curved protrusion is provided on the first roller body; A second roller body is disposed opposite to the first roller body. The second roller body has an annular curved surface concave portion. The annular curved surface protrusion of the first roller body and the annular curved surface concave portion of the second roller body are correspondingly engaged to roll the foil material. A driving component, the driving component being connected to at least one of the first roller body and the second roller body, the driving component being used to adjust the pressing force between the first roller body and the second roller body; The first roller body and / or the second roller body are respectively provided with friction structures at both ends to increase the friction of the adjusting roller group on the edge of the foil.

2. The drying foil adjusting device as described in claim 1, characterized in that, The regulating roller assembly also includes a temperature controller connected to the first roller body and / or the second roller body to regulate the temperature of the first roller body and / or the second roller body.

3. The drying foil adjusting device as described in claim 2, characterized in that, The drying foil adjustment device includes at least two adjustment roller groups arranged sequentially along the foil conveying direction, and the temperature of the adjustment roller groups decreases step by step along the foil conveying direction.

4. The drying foil adjusting device as described in claim 2, characterized in that, A cavity is provided inside the first roller body and / or the second roller body, and the temperature controller is circulatedly connected to the cavity. The temperature controller is used to introduce heat-conducting liquid into the cavity.

5. The drying foil adjusting device as described in claim 1, characterized in that, The friction structure includes a friction material layer or friction texture disposed on the first roller body and / or the second roller body; And / or, the total width of the friction structure on the first roller and / or the total width of the friction structure on the second roller are each independently 20% to 30% of the width of the foil.

6. The drying foil adjusting device as described in claim 1, characterized in that, The drying foil adjusting device includes at least two adjusting roller groups, and the height of the annular curved protrusion in each adjusting roller group gradually decreases along the conveying direction of the foil.

7. The drying foil adjusting device according to any one of claims 1-6, characterized in that, The height of the annular curved protrusion is 25mm~30mm; And / or, the depth of the concave portion of the annular curved surface is 25mm~30mm.

8. A method for adjusting the drying of foil, characterized in that, The method for adjusting the drying foil using the drying foil adjusting device according to any one of claims 1-7 includes: The foil material output from the dryer is conveyed to the adjusting roller group. The annular curved protrusion of the first roller body and the annular curved concave part of the second roller body are correspondingly fitted. The pressing force between the first roller body and the second roller body is adjusted by the driving component to roll the foil material.

9. The method for adjusting the drying foil as described in claim 8, characterized in that, The method for adjusting the drying foil material satisfies at least one of the following conditions: (1) The pressing force between the first roller and the second roller is 10N~20N; (2) The tension of the foil is 70N~80N.

10. The method for adjusting the drying foil as described in claim 8 or 9, characterized in that, The drying foil adjustment device includes at least two adjustment roller groups arranged sequentially along the foil conveying direction. The temperature of the adjustment roller groups decreases gradually along the foil conveying direction, and the temperature difference between two adjacent adjustment roller groups is 5℃~15℃.

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