Film compositing device

Abstract

The present application relates to the field of film compositing, and in particular to a film compositing device. The film compositing device comprises: a main roller configured to receive a first film; and a first auxiliary roller and a second auxiliary roller which are sequentially arranged around the main roller along the rotating direction of the main roller; wherein the distance between the first auxiliary roller and the main roller is L1, the distance between the second auxiliary roller and the main roller is L2, L1>L2, and the first auxiliary roller and the second auxiliary roller are configured to jointly guide the first film to gradually fit with the main roller. The film compositing device can alleviate axial shrinkage of the film before compositing, thereby improving the quality of film compositing.

Description

Thin film composite equipment Technical Field

[0001] The present application relates to the field of thin film composite technology, and in particular to a thin film composite device. Background Art

[0002] Composite thin films are a common raw material in the manufacturing industry. Poor quality composite thin films can seriously impact the safety of the products or devices they are used to manufacture, posing potential safety risks. For example, in the manufacturing process of hydrogen batteries, a proton exchange membrane and a frame membrane must be combined to form a composite thin film. Poor quality composites of the proton exchange membrane and frame membrane can reduce the battery's capacity or safety. Another example is the preparation of electrolyzers, where a proton membrane and a catalyst membrane must be combined before the catalyst layer is applied to the membrane via a transfer process. Poor quality composites of the proton exchange membrane and catalyst membrane can impact the electrolytic performance of the electrolyzer.

[0003] Summary of the Invention

[0004] The present application discloses a thin film composite device, which can improve the phenomenon of axial shrinkage of thin films before composite, thereby improving the quality of thin film composite.

[0005] In order to achieve the above-mentioned purpose, the present application discloses a film composite equipment, including: a main roller, for receiving a first film; a first auxiliary roller and a second auxiliary roller, along the rotation direction of the main roller, the first auxiliary roller and the second auxiliary roller are arranged around the main roller in sequence; wherein, the spacing between the first auxiliary roller and the main roller is L1, and the spacing between the second auxiliary roller and the main roller is L2, L1>L2, and the first auxiliary roller and the second auxiliary roller are configured to jointly guide the first film to gradually fit onto the main roller.

[0006] Optionally, the film composite equipment also includes: a first composite roller, located downstream of the second auxiliary roller, the first composite roller and the main roller having a rotation direction opposite to each other, the first composite roller being used to receive the second film and composite the first film and the second film together with the main roller to form a composite film.

[0007] Optionally, the film composite equipment also includes: a second composite roller, located downstream of the first composite roller, the distance between the first composite roller and the main roller is L3, the distance between the second composite roller and the main roller is L4, L3≥L4, the second composite roller is used to press the composite film with the main roller.

[0008] Optionally, the diameter of the first composite roller is d1, and the diameter of the second composite roller is d2, satisfying: d2≤d1.

[0009] Optionally, the hardness of the outer circumferential surface of the first composite roller is smaller than the hardness of the outer circumferential surface of the main roller.

[0010] Optionally, the diameter of the first composite roller is d1, and the diameter of the main roller is D, satisfying: d1<D.

[0011] Optionally, the film composite equipment further includes: a frame, on which the main roller, the first auxiliary roller and the second auxiliary roller are rotatably mounted; and a composite drive mechanism mounted on the frame for driving the first composite roller to move closer to or away from the main roller.

[0012] Optionally, the first composite roller is slidably mounted on the frame along a third direction via a slide rail assembly, and the composite drive mechanism is used to drive the first composite roller to switch between a composite position and a non-composite position along the third direction.

[0013] Optionally, the film laminating equipment further includes: a heating module, configured to heat the second film received by the first laminating roller.

[0014] Optionally, the heating module is an infrared heating module, or the first composite roller is a hot roller.

[0015] Optionally, the distance between the first composite roller and the main roller is L3, which satisfies: 0.4≤d1 / D≤0.8, 0.01≤L3 / D≤0.1.

[0016] Optionally, the main roller is a steel roller, the first composite roller is a rubber roller, or a rubber layer is provided on the surface of the first composite roller.

[0017] Optionally, the first film is a proton exchange membrane, and the second film is a frame material, or the first film is a proton membrane, and the second film is a transfer membrane with a catalyst layer on its surface.

[0018] Optionally, along the axial direction of the first auxiliary roller, the surface of the first auxiliary roller bulges from the edge toward the middle.

[0019] Optionally, the film composite equipment further includes: a speed measuring module installed on the first auxiliary roller, for detecting the rotation speed of the first auxiliary roller, and the main roller is configured to adjust its own rotation speed in real time according to the detection value of the speed measuring module.

[0020] Optionally, the speed measurement module is an encoder.

[0021] Optionally, the arrangement angle between the first auxiliary roller and the second auxiliary roller relative to the main roller is α, which satisfies: α≤90°.

[0022] Optionally, the film composite equipment further includes: an intermediate auxiliary roller, arranged between the first auxiliary roller and the second auxiliary roller, and the distance between the intermediate auxiliary roller and the main roller is L5, satisfying: L1<L5≤L2.

[0023] Optionally, there are multiple intermediate auxiliary rollers, and the multiple intermediate auxiliary rollers are arranged at intervals between the first auxiliary roller and the second auxiliary roller. Along the direction from the first auxiliary roller to the second auxiliary roller, the distance between each intermediate auxiliary roller and the main roller gradually becomes smaller.

[0024] Optionally, a flattened section is formed between the first auxiliary roller and the second auxiliary roller, and in the circumferential direction of the main roller, the flattened section occupies less than one quarter of the circumference of the main roller.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The film laminating equipment of the embodiment of the present application comprises a first auxiliary roller and a second auxiliary roller. The spacing between the first auxiliary roller and the main roller is greater than the spacing between the second auxiliary roller and the main roller. After the first film enters the main roller, it passes through the first and second auxiliary rollers in sequence, and the spacing between the first film and the main roller gradually decreases, so that it gradually adheres to the outer circumference of the main roller. On the one hand, the outer circumference of the main roller is continuously curved, which can provide normal support force to the first film to offset the normal force generated during axial shrinkage. On the other hand, as the first film gradually approaches the main roller, it can be gradually bent until it adheres to the surface of the main roller, reducing the possibility of localized large-scale bending of the first film and the probability of axial shrinkage. Therefore, the first film is fully flattened before being attached to the main roller, which reduces the phenomenon of axial shrinkage, and the film laminating equipment also has good film lamination quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] FIG1 is a schematic diagram of a thin film composite device provided in an embodiment of the present application;

[0029] FIG2 is a schematic diagram of a first auxiliary roller in a thin film composite device provided in an embodiment of the present application;

[0030] FIG3 is a schematic diagram of another form of thin film composite equipment provided in an embodiment of the present application;

[0031] FIG4 is a schematic structural diagram of a heating module and a speed measurement module in a thin film composite device according to an embodiment of the present application.

[0032] Description of the drawings: 100-film composite equipment; 110-frame; 120-main roller; 121-first outer peripheral surface; 130-flattening roller group; 131-first auxiliary roller; 1311-first end; 1312-second end; 1313-middle; 1314-second outer peripheral surface; 132-second auxiliary roller; 133-middle auxiliary roller; 140-first composite roller; 150-second composite roller; 160-composite drive mechanism; 170-heating module; 180-speed measurement module; 210-first film; 220-second film; 230-composite film; P1-first direction; P2-second direction; Q-first axis; R-third direction. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0035] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0036] In the related art, two different films are passed between a pair of rollers to form a composite film. However, due to the possibility of axial shrinkage of the films during transportation, the composite film inevitably has quality problems.

[0037] If a film composite device can be provided that can improve the phenomenon of axial shrinkage of the film before it enters a pair of pressure rollers, the yield rate of the composite film will be improved, thereby indirectly reducing the production cost of the composite film. Products using the composite film as raw material will also have better safety performance.

[0038] It should be understood that thin films refer to highly elastic, easily deformable, low-modulus films, such as proton exchange membranes, polyethylene films, and silicone films. These thin film materials are prone to deformation during transport. Due to factors such as roller temperature and roller diameter fluctuations, they can easily wrinkle along the roller's axis when attached to the roller, leading to defects such as delamination and bending during lamination. The purpose of laminating two thin films can be to form a composite film or to transfer a coating from one film to another.

[0039] As shown in FIG1 , a film laminating apparatus 100 according to some embodiments of the present application includes a main roller 120 and a flattening roller assembly 130 . The flattening roller assembly 130 includes a first auxiliary roller 131 and a second auxiliary roller 132 . The main roller 120 is used to receive a first film 210 and rotates in a first direction P1 . The first auxiliary roller 131 and the second auxiliary roller 132 are sequentially arranged around the main roller 120 along the first direction P1 . The spacing between the first auxiliary roller 131 and the main roller 120 is L1 , and the spacing between the second auxiliary roller 132 and the main roller 120 is L2 , where L1>L2 . The first auxiliary roller 131 and the second auxiliary roller 132 are configured to jointly guide the first film 210 to gradually adhere to the main roller 120 .

[0040] The film laminating apparatus 100 of the embodiment of the present application comprises a first auxiliary roller 131 and a second auxiliary roller 132. The spacing between the first auxiliary roller 131 and the main roller 120 is greater than the spacing between the second auxiliary roller 132 and the main roller 120. After the first film 210 enters the main roller 120, it passes through the first and second auxiliary rollers 131 and 132 in sequence, with the spacing between the first film 210 and the main roller 120 gradually decreasing, thereby gradually conforming to the outer circumference of the main roller 120. On the one hand, the outer circumference of the main roller 120 is continuously curved, providing normal support force to the first film 210 to offset the normal force generated during axial contraction. On the other hand, as the first film 210 gradually approaches the main roller 120, it is able to gradually bend until it conforms to the surface of the main roller 120, reducing the possibility of localized significant bending of the first film 210 and the probability of axial contraction. Therefore, the first film 210 is fully flattened before being attached to the main roller 120 , thereby improving the axial shrinkage phenomenon, and the film laminating device 100 also has better film laminating quality.

[0041] The embodiments of this application frequently involve the spacing between two rollers. The spacing between two rollers refers to the minimum distance between the outer circumferences of the two rollers. As shown in Figure 1 , taking the spacing between the main roller 120 and the first auxiliary roller 131 as an example, the main roller 120 has a first outer circumference 121, and the first auxiliary roller 131 has a second outer circumference 1314. The spacing between the first auxiliary roller 131 and the main roller 120 refers to the minimum distance between the first outer circumference 121 and the second outer circumference 1314.

[0042] As shown in FIG. 1 , in some embodiments of the present application, the first auxiliary roller 131 and the second auxiliary roller 132 are arranged at an angle α relative to the main roller 120 , and α≤90°.

[0043] A flattening section is formed between the first auxiliary roller 131 and the second auxiliary roller 132, through which the first film 210 is flattened. The flattening section occupies less than one-quarter of the circumference of the main roller 120. This effectively flattens the first film 210 while leaving space around the main roller 120 for arranging other components.

[0044] As shown in FIG. 2 , in some embodiments of the present application, along the axial direction of the first auxiliary roller 131 , the surface of the first auxiliary roller 131 bulges from the edge toward the middle.

[0045] Specifically, the first auxiliary roller 131 is a mid-height roller. The axis of the first auxiliary roller 131 extends along the first axis Q. Along the first axis Q, the first auxiliary roller 131 includes a first end 1311, a second end 1312, and a middle portion 1313. The local diameter of the first auxiliary roller 131 gradually increases from the first end 1311 to the middle portion 1313, and then gradually decreases from the middle portion 1313 to the second end 1312.

[0046] With this arrangement, the first film 210 can be stretched from the middle to the edge, thereby improving the phenomenon of axial contraction of the first film 210 .

[0047] In other embodiments, the first auxiliary roller 131 may also be a flat roller, that is, along the first axis Q, the diameter of the first auxiliary roller 131 is stable and unchanged.

[0048] As shown in Figure 3, in some embodiments of the present application, the flattening roller group 130 also includes an intermediate auxiliary roller 133, which is arranged between the first auxiliary roller 131 and the second auxiliary roller 132. The distance between the intermediate auxiliary roller 133 and the main roller 120 is L5, L1<L5≤L2.

[0049] As an example, L5<L2, by setting the intermediate auxiliary roller 133, the first film 210 can be guided to bend gently and gradually adhere to the first outer peripheral surface 121 of the main roller 120, so as to improve the axial shrinkage of the first film 210; as another example, L5=L2, by setting the intermediate auxiliary roller 133, the bonding area between the first film 210 and the first outer peripheral surface 121 can be increased, so as to improve the axial shrinkage of the first film 210.

[0050] Furthermore, the number of intermediate auxiliary rollers 133 can be multiple, and the multiple intermediate auxiliary rollers 133 are arranged between the first auxiliary roller 131 and the second auxiliary roller 132 at intervals along the first direction P1. Along the direction from the first auxiliary roller 131 to the second auxiliary roller 132, the distance between each intermediate auxiliary roller 133 and the main roller 120 gradually becomes smaller.

[0051] As shown in Figure 3, in some embodiments of the present application, the film composite equipment 100 also includes a first composite roller 140, which is located downstream of the second auxiliary roller 132. The rotation direction of the first composite roller 140 is opposite to that of the main roller 120. The first composite roller 140 is used to receive the second film 220 and to composite the first film 210 and the second film 220 together with the main roller 120 to form a composite film 230.

[0052] The first laminating roller 140 rotates in the second direction P2, with the first direction P1 and the second direction P2 being opposite each other. A fixed section is formed between the first laminating roller 140 and the second auxiliary roller 132. This means that the first film 210 is completely adhered to the surface of the main roller 120 at the second auxiliary roller 132 and is transported toward the first laminating roller 140 as the main roller 120 rotates. After passing through the second auxiliary roller 132, the tension of the first film 210 remains stable, allowing for reliable lamination of the first and second films 210, 220, at the first laminating roller 140.

[0053] With this arrangement, the first film 210 and the second film 220 can be composited at the first composite roller 140 to form a composite film 230 .

[0054] In some embodiments of the present application, the first film 210 is a proton exchange membrane, the second film 220 is a frame material, and the composite film 230 is one of the raw materials of the hydrogen energy battery; in other embodiments of the present application, the first film 210 is a proton membrane, the second film 220 is a transfer film with a catalyst layer on the surface, and the first film 210 and the second film 220 are composited and then the second film 220 is torn off, and the catalyst layer on the surface of the second film 220 is transferred to the surface of the first film 210 to form the composite film 230; in other embodiments, the first film 210, the second film 220 and the composite film 230 can also be other films.

[0055] In some embodiments of the present application, the surface of the second film 220 facing away from the first composite roller 140 is coated with an adhesive layer. After the second film 220 and the first film 210 are laminated, they are bonded together via the adhesive layer. The adhesive layer is then pressed against the main roller 120 by the first composite roller 140 to form the composite film 230. The adhesive layer can be made of either a heat-sensitive adhesive or a pressure-sensitive adhesive. In other embodiments of the present application, the first film 210 and the second film 220 can also be a pair of films that are transfer-coated with a catalyst layer.

[0056] In some embodiments of the present application, the hardness of the outer circumference of the first composite roller 140 is less than the hardness of the outer circumference of the main roller 120 .

[0057] With this arrangement, the supporting force of the first composite roller 140 on the first film 210 and the second film 220 is weaker than that of the main roller 120. The surface of the first composite roller 140 can be deformed to achieve elastic pressing of the first film 210 and the second film 220, thereby reducing the probability of the first film 210 and the second film 220 tearing at the composite point.

[0058] In some embodiments of the present application, the main roller 120 is a steel rod, and the first composite roller 140 is a rubber roller; in other embodiments, a rubber layer may also be provided on the surface of the first composite roller 140 .

[0059] As shown in FIG. 3 , in some embodiments of the present application, the diameter of the first composite roller 140 is d1 , the diameter of the main roller 120 is D, and d1 <D.

[0060] This arrangement can reduce the lamination area between the first composite roller 140 and the main roller 120. When the first film 210 and the second film 220 pass through the first composite roller 140 for lamination, the lamination shear force they are subjected to is smaller, thereby reducing the probability of tearing at this location.

[0061] Furthermore, the distance between the first composite roller 140 and the main roller 120 is L3, 0.4≤d1 / D≤0.8, 0.01≤L3 / D≤0.1.

[0062] Limiting the values ​​of d1 / D and L3 / D within the above range can not only reduce the pressing area between the first composite roller 140 and the main roller 120, but also ensure the pressing strength of the first film 210 and the second film 220, so that the first film 210 and the second film 220 can be reliably composited to form a composite film 230.

[0063] It will be appreciated that in some embodiments of the present application, composite film 230 is formed by laminating first film 210 and second film 220, and first laminating roller 140 receives second film 220 and completes the lamination process of the two films. In other embodiments, for composite films composed of three or more layers, additional laminating rollers may be arranged downstream of first laminating roller 140 to sequentially complete the lamination of multiple layers of film. This will not be further described herein.

[0064] As shown in Figure 3, in some embodiments of the present application, the film composite equipment 100 also includes a second composite roller 150, which is located downstream of the first composite roller 140. The distance between the first composite roller 140 and the main roller 120 is L3, and the distance between the second composite roller 150 and the main roller 120 is L4, L3 ≥ L4, and the second composite roller 150 is used to press the composite film 230 with the main roller 120.

[0065] As an example, L3>L4, a reinforcement section is formed between the first and second composite rollers 140, 150. The first and second films 210, 220 pass through the first composite roller 140 to form a composite film 230. Initial bonding is achieved between the first and second films 210, 220. After the composite film 230 passes through the second composite roller 150, it is subjected to segmented pressurization to achieve full bonding and further reduce the thickness of the composite film 230. As another example, L3=L4, the composite film 230 passes through the second composite roller 150 for a secondary pressurization, further uniformizing the surface density of the composite film 230 and improving the quality of the composite film 230.

[0066] The diameter of the second composite roller 150 is d2. In some embodiments of the present application, d2 is less than d1, thereby further reducing the lamination area between the second composite roller 150 and the main roller 120. When the composite film 230 passes through the second composite roller 150 for lamination, the lamination shear force is further reduced, thereby further ensuring the lamination quality at this location.

[0067] In other embodiments, d2 may be equal to d1.

[0068] As shown in FIG4 , the thin film laminating apparatus 100 further includes a frame 110 and a composite drive mechanism 160. The main roller 120, the first auxiliary roller 131, and the second auxiliary roller 132 are all rotatably mounted on the frame 110. The composite drive mechanism 160 is mounted on the frame 110 and is used to drive the first composite roller 140 toward or away from the main roller 120.

[0069] The first composite roller 140 can be slidably mounted on the frame 110 along a third direction R via a slide rail assembly. The composite drive mechanism 160 is configured to drive the first composite roller 140 along the third direction R between a composite position and a non-combine position. When the first composite roller 140 is in the composite position, the distance between the first composite roller 140 and the main roller 120 is L3, and the first composite roller 140 and the main roller 120 jointly compress the first film 210 and the second film 220. When the first composite roller 140 is in the non-combine position, the distance between the first composite roller 140 and the main roller 120 is greater than L3. Furthermore, the first composite roller 140 can have different composite positions to accommodate different materials of the second film 220 and different thickness requirements of the composite film 230.

[0070] This arrangement makes it easier for the first composite roller 140 to receive the second film 220 or perform maintenance.

[0071] In other embodiments, the first composite roller 140 may also be always maintained at the composite position.

[0072] In some embodiments of the present application, the film laminating apparatus 100 further includes a heating module 170 for heating the second film 220 received by the first laminating roller 140 .

[0073] The heating module 170 is installed on the rack 110 and can be an infrared heating module or other types of heating modules.

[0074] By providing the heating module 170 , the adhesive layer on the surface of the second film 220 can be heated, thereby improving the thermal bonding effect between the first film 210 and the second film 220 .

[0075] In other embodiments, the second film 220 may also be heated by arranging the first composite roller 140 as a hot roller.

[0076] In some embodiments of the present application, the thin film composite equipment 100 also includes a speed measuring module 180 installed on the first auxiliary roller 131, which is used to detect the rotational speed of the first auxiliary roller 131, and the main roller 120 is configured to adjust its own rotational speed in real time according to the detection value of the speed measuring module 180.

[0077] The main roller 120 may vary in diameter due to temperature fluctuations, causing fluctuations in the linear speed of the main roller 120. By detecting the rotational speed of the first auxiliary roller 131, the conveying speed of the first film 210 can be accurately calculated, and the rotational speed of the main roller 120 can be adjusted in the opposite direction until the conveying speed of the first film 210 meets the preset value.

[0078] Specifically, the speed measuring module 180 can be an encoder. The first film 210 passes through the first auxiliary roller 131 to drive the first auxiliary roller 131 to rotate. The speed measuring module 180 records the pulse output and transmits it to the PLC. After conversion, the conveying speed of the first film 210 is obtained, and the rotation speed of the main roller 120 is adjusted in real time to make the conveying speed of the first film 210 meet the preset value.

[0079] Through this arrangement, the rotation speed of the main roller 120 can be adjusted in real time, overcoming the problem of the conveying speed of the first film 210 being affected by the change in the diameter of the main roller 120, reducing the phenomenon of accumulation or tearing of the first film 210, and improving the operating reliability of the film composite equipment 100.

[0080] The working principle of the thin film composite device 100 is as follows:

[0081] The first film 210 is fed into the main roller 120 and is bent toward the outer circumference of the main roller 120 under the guidance of the first auxiliary roller 131. The main roller 120 rotates along the first direction P1 to transport the first film 210.

[0082] The first film 210 is completely attached to the outer circumference of the main roller 120 when passing through the second auxiliary roller 132. During the process of the first film 210 passing through the flattening section, it gradually adheres to the outer circumference of the main roller 120.

[0083] The first film 210 passes through the fixed section and reaches the first composite roller 140;

[0084] The second film 220 is fed into the first composite roller 140 , and the first composite roller 140 rotates along the second direction P2 to convey the second film 220 ;

[0085] The heating module 170 heats the adhesive layer on the outer surface of the second film 220;

[0086] The second film 220 and the first film 210 are put into the space between the first composite roller 140 and the main roller 120 for preliminary composite to form a composite film 230 ;

[0087] After passing through the reinforcement section, the composite film 230 passes between the second composite roller 150 and the main roller 120 for further composite, so that the first film 210 and the second film 220 are fully bonded;

[0088] The composite film 230 is unloaded and sent to the next step.

[0089] In the film laminating apparatus 100 of the embodiment of the present application, firstly, the spacing between the first auxiliary roller 131 and the main roller 120 is greater than the spacing between the second auxiliary roller 132 and the main roller 120, which can improve the wrinkling of the first film 210. Secondly, the diameter d1 of the first laminating roller 140 is smaller than the diameter D of the main roller 120, which can reduce the shear force on the first and second films 210, 220 at the first laminating roller 140, thereby reducing the probability of film tearing during lamination of the first and second films 210, 220. Thirdly, the second laminating roller 150 is positioned downstream of the first laminating roller 140, which reduces the probability of film delamination and poor adhesion during lamination of the first and second films 210, 220 by increasing pressure in stages. Using the film laminating apparatus 100 of the embodiment of the present application for film lamination operations achieves good film lamination quality.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A thin film composite device, characterized in that: include: a main roller for receiving the first film; A first auxiliary roller and a second auxiliary roller, wherein the first auxiliary roller and the second auxiliary roller are sequentially arranged around the main roller along the rotation direction of the main roller; The distance between the first auxiliary roller and the main roller is L1, the distance between the second auxiliary roller and the main roller is L2, L1>L2, and the first auxiliary roller and the second auxiliary roller are configured to jointly guide the first film to gradually adhere to the main roller.

2. The thin film composite device according to claim 1, characterized in that: The thin film composite equipment also includes: The first composite roller is located downstream of the second auxiliary roller. The first composite roller rotates in the opposite direction to the main roller. The first composite roller is used to receive the second film and composite the first film and the second film together with the main roller to form a composite film.

3. The thin film composite device according to claim 2, characterized in that: The thin film composite equipment also includes: The second composite roller is located downstream of the first composite roller, the distance between the first composite roller and the main roller is L3, the distance between the second composite roller and the main roller is L4, L3≥L4, and the second composite roller is used to press the composite film with the main roller.

4. The thin film composite device according to claim 3, characterized in that: The diameter of the first composite roller is d1, and the diameter of the second composite roller is d2, which satisfies: d2≤d1.

5. The thin film composite device according to claim 2, characterized in that: The hardness of the outer peripheral surface of the first composite roller is smaller than the hardness of the outer peripheral surface of the main roller.

6. The thin film composite device according to claim 2, characterized in that: The diameter of the first composite roller is d1, and the diameter of the main roller is D, which satisfies: d1<D.

7. The thin film composite device according to claim 2, characterized in that: The thin film composite equipment also includes: A frame, wherein the main roller, the first auxiliary roller and the second auxiliary roller are rotatably mounted on the frame; The composite driving mechanism is installed on the frame and is used to drive the first composite roller to approach or move away from the main roller.

8. The thin film composite device according to claim 7, characterized in that: The first composite roller is slidably mounted on the frame along a third direction via a slide rail assembly, and the composite drive mechanism is used to drive the first composite roller to switch between a composite position and a non-composite position along the third direction.

9. The thin film composite device according to claim 2, characterized in that: The thin film composite equipment also includes: The heating module is used to heat the second film received by the first composite roller.

10. The thin film composite device according to claim 9, characterized in that: The heating module is an infrared heating module, or The first composite roller is a hot roller.

11. The thin film composite device according to claim 2, characterized in that: The distance between the first composite roller and the main roller is L3, which satisfies: 0.4≤d1 / D≤0.8, 0.01≤L3 / D≤0.

1.

12. The thin film composite device according to claim 2, characterized in that: The main roller is a steel roller, and the first composite roller is a rubber roller, or The surface of the first composite roller is provided with a rubber layer.

13. The thin film composite device according to claim 2, characterized in that: The first film is a proton exchange membrane, the second film is a frame material, or The first film is a proton membrane, and the second film is a transfer membrane having a catalyst layer on its surface.

14. The thin film composite device according to any one of claims 1 to 13, characterized in that: Along the axial direction of the first auxiliary roller, the surface of the first auxiliary roller bulges from the edge to the middle.

15. The thin film composite device according to any one of claims 1 to 13, characterized in that: The thin film composite equipment also includes: The speed measuring module is installed on the first auxiliary roller and is used to detect the rotation speed of the first auxiliary roller. The main roller is configured to adjust its own rotation speed in real time according to the detection value of the speed measuring module.

16. The thin film composite device according to claim 15, characterized in that: The speed measurement module is an encoder.

17. The thin film composite device according to any one of claims 1 to 13, characterized in that: The arrangement angle α between the first auxiliary roller and the second auxiliary roller relative to the main roller satisfies: α≤90°。 18. The thin film composite device according to any one of claims 1 to 13, characterized in that: The thin film composite equipment also includes: The intermediate auxiliary roller is arranged between the first auxiliary roller and the second auxiliary roller, and the distance between the intermediate auxiliary roller and the main roller is L5, which satisfies: L1<L5≤L2.

19. The thin film composite device according to claim 18, characterized in that: There are multiple intermediate auxiliary rollers, which are arranged between the first auxiliary roller and the second auxiliary roller at intervals. Along the direction from the first auxiliary roller to the second auxiliary roller, the distance between each intermediate auxiliary roller and the main roller gradually decreases.

20. The thin film composite device according to any one of claims 1 to 13, characterized in that: A flattened section is formed between the first auxiliary roller and the second auxiliary roller, and in the circumferential direction of the main roller, the flattened section occupies less than one quarter of the circumferential direction of the main roller.

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