WO2025031288A1 - Film compositing device - Google Patents

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

The present application relates to the field of thin film composite technology, and in particular to a thin film composite device.

Background Art

In the manufacturing industry, composite film is a very common raw material. If the quality of the composite film is poor, it will seriously affect the safety performance of the products or devices used to prepare it, and there are certain safety hazards. For example, in the manufacturing process of hydrogen energy cells, the proton exchange membrane and the frame membrane need to be composited to form a composite film. If the composite quality of the proton exchange membrane and the frame membrane is poor, the capacity or safety performance of the hydrogen energy battery may be reduced; for another example, in the preparation process of the electrolyzer, the proton membrane and the catalyst membrane need to be composited, and then the catalyst layer is coated on the proton membrane by transfer printing. If the composite quality of the proton membrane and the catalyst membrane is poor, the electrolytic performance of the electrolyzer may be affected.

Summary of the invention

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

In order to achieve the above-mentioned purpose, the present application discloses a film composite equipment, including: a main roller, used to receive 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, the spacing between the second auxiliary roller and the main roller is L2, L1＞L2, the first auxiliary roller and the second auxiliary roller are configured to jointly guide the first film to gradually fit onto the main roller.

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 have a rotation direction opposite, the first composite roller is used to receive the second film, and together with the main roller composite the first film and the second film to form a composite film.

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, and the second composite roller is used to press the composite film with the main roller.

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

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.

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

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.

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.

Optionally, the film composite equipment further comprises: a heating module, configured to heat the second film received by the first composite roller.

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

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.

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.

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 having a catalyst layer on its surface.

Optionally, along the axial direction of the first auxiliary roller, the surface of the first auxiliary roller bulges from the edge to the middle.

Optionally, the thin film composite equipment further comprises: 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.

Optionally, the speed measurement module is an encoder.

Optionally, the arrangement angle between the first auxiliary roller and the second auxiliary roller relative to the main roller is α, satisfying: α≤90°.

Optionally, the thin film composite equipment further includes: an intermediate auxiliary roller, which 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, satisfying: L1＜L5≤L2.

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 decreases.

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

Compared with the prior art, the beneficial effects of this application are:

The film composite equipment of the embodiment of the present application is equipped with a first auxiliary roller and a second auxiliary roller. The distance between the first auxiliary roller and the main roller is greater than the distance between the second auxiliary roller and the main roller. After the first film enters the main roller, it passes through the first auxiliary roller and the second auxiliary roller in sequence. The distance between the first film and the main roller gradually decreases to gradually fit the outer peripheral surface of the main roller. On the one hand, the outer peripheral surface of the main roller is continuously bent, which can provide normal support force for the first film to offset the normal force generated during axial contraction; on the other hand, as the first film gradually approaches the main roller, the first film can be gradually bent until it fits the surface of the main roller, reducing the existence of the first film. The possibility of local large-scale bending can also reduce the probability of axial shrinkage. Therefore, the first film is fully flattened before being attached to the main roller, which improves the axial shrinkage phenomenon and the film composite equipment also has better film composite quality.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 paying creative work.

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

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

FIG3 is a schematic diagram of another form of thin film composite device provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of the structure of a heating module and a speed measuring module in a thin film composite device provided in an embodiment of the present application.

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

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, ordinary technicians in this field will not make creative All other embodiments obtained under the premise of labor are within the scope of protection of this application.

In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

In the related art, two different films are passed between a pair of pressing rollers and compounded to form a composite film. However, since the films may shrink axially during transportation, the composite film formed by compounding inevitably has quality problems.

If a thin 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.

It is understood that the film refers to a low modulus film with high elasticity and easy deformation, such as proton exchange membrane, polyethylene film, silicone film, etc. This type of film material is easy to deform during transportation. Due to factors such as roller temperature and roller diameter changes, it is easy to wrinkle along the axial direction of the roller when it is attached to the roller, and it is easy to have problems such as delamination and bending during lamination. The purpose of laminating two layers of film can be to form a composite film or to transfer the coating layer on the surface of one film to another film.

As shown in FIG. 1 , a thin film composite device 100 of some embodiments of the present application includes a main roller 120 and a flattening roller group 130, wherein the flattening roller group 130 includes a first auxiliary roller 131 and a second auxiliary roller 132. The main roller 120 is used to connect The first film 210 is collected, the main roller 120 rotates along the first direction P1, and along the first direction P1, the first auxiliary roller 131 and the second auxiliary roller 132 are sequentially arranged around the main roller 120. The distance between the first auxiliary roller 131 and the main roller 120 is L1, and the distance between the second auxiliary roller 132 and the main roller 120 is L2, L1>L2, and 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.

The film composite equipment 100 of the embodiment of the present application is provided with a first auxiliary roller 131 and a second auxiliary roller 132. The distance between the first auxiliary roller 131 and the main roller 120 is greater than the distance 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 auxiliary roller 131 and the second auxiliary roller 132 in sequence. The distance between the first film 210 and the main roller 120 gradually decreases, so as to gradually fit the outer peripheral surface of the main roller 120. On the one hand, the outer peripheral surface of the main roller 120 is continuously bent, which can provide a normal support force to the first film 210 to offset the normal force generated during axial contraction; on the other hand, since the first film 210 gradually approaches the main roller 120, the first film 210 can be gradually bent until it fits the surface of the main roller 120, which reduces the possibility of local large-scale 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 a good film laminating quality.

In the embodiments of the present application, the spacing between two roller bodies is involved in many places. The spacing between two roller bodies refers to the minimum spacing between the outer circumferences of the two roller bodies. As shown in FIG1 , 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 spacing between the first outer circumference 121 and the second outer circumference 1314.

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°.

A flattening section is formed between the first auxiliary roller 131 and the second auxiliary roller 132, and the first film 210 is flattened by passing through the flattening section. In the circumference of the main roller 120, the flattening section occupies less than one quarter of the circumference of the main roller 120. The first film 210 can be effectively flattened, and other spaces in the circumferential direction of the main roller 120 can be left for arranging other components.

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 to the middle.

Specifically, the first auxiliary roller 131 is a middle-high roller, and 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 gradually decreases from the middle portion 1313 to the second end 1312.

Through 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 .

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.

As shown in FIG. 3 , in some embodiments of the present application, the flattening roller set 130 further includes an intermediate auxiliary roller 133 disposed between the first auxiliary roller 131 and the second auxiliary roller 132 , and the distance between the intermediate auxiliary roller 133 and the main roller 120 is L5 , L1＜L5≤L2.

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

Furthermore, the number of the 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 decreases.

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 composite the first film 210 and the second film 220 together with the main roller 120 to form a composite film 230.

The rotation direction of the first composite roller 140 is the second direction P2, and the first direction P1 is opposite to the second direction P2. A fixed section is formed between the first composite roller 140 and the second auxiliary roller 132, that is, the first film 210 is completely attached to the surface of the main roller 120 at the second auxiliary roller 132, and is transported to the first composite roller 140 under the rotation of the main roller 120. After passing through the second auxiliary roller 132, the tension state of the first film 210 is maintained stable, and the first film 210 and the second film 220 are reliably composited at the first composite roller 140.

Through 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 .

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 having a catalyst layer on the surface, 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 may also be other films.

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 a glue layer, and the second film 220 and the first film 210 are laminated and bonded by the glue layer, and then the first composite roller 140 and the main roller 120 are pressed together to form a composite film 230. The material of the glue layer can be 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.

In some embodiments of the present application, the hardness of the outer peripheral surface of the first composite roller 140 is less than that of the main roller 120. The hardness of the outer surface.

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, and the elastic pressing of the first film 210 and the second film 220 can be achieved by deformation of the surface of the first composite roller 140, thereby reducing the probability of tearing of the first film 210 and the second film 220 at the composite point.

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 .

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.

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 are laminated together through the first composite roller 140, the lamination shear force they are subjected to is smaller, thereby reducing the probability of tearing at this location.

Further, 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.

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.

It is understood that in some embodiments of the present application, the composite film 230 is formed by the composite of the first film 210 and the second film 220, and the first composite roller 140 receives the second film 220 and completes the composite process of the two films. In other embodiments, based on the composite film composed of three or more layers of films, more composite rollers can be arranged downstream of the first composite roller 140 to sequentially complete the composite of the multi-layer films, which will not be further described herein.

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, 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.

As an example form, L3>L4, a reinforcement section is formed between the first composite roller 140 and the second composite roller 150, the first film 210 and the second film 220 pass through the first composite roller 140 and form a composite film 230, the first film 210 and the second film 220 are initially bonded, and the composite film 230 is subjected to segmented pressurization after passing through the second composite roller 150 to achieve full bonding, further reducing the thickness of the composite film 230. As another example form, L3=L4, the composite film 230 passes through the second composite roller 150 for secondary lamination, further making the surface density of the composite film 230 uniform everywhere, and improving the quality of the composite film 230.

The diameter of the second composite roller 150 is d2. In some embodiments of the present application, d2<d1, so as to further reduce the lamination area between the second composite roller 150 and the main roller 120, and the lamination shear force of the composite film 230 when being laminated by the second composite roller 150 is further reduced, thereby further ensuring the lamination quality at this location.

In other embodiments, d2 may be equal to d1.

As shown in FIG4 , the thin film composite device 100 further includes a frame 110 and a composite drive mechanism 160, and 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 to approach or move away from the main roller 120.

The first composite roller 140 can be slidably installed on the frame 110 along the third direction R by means of a slide rail assembly, and the composite drive mechanism 160 is used to drive the first composite roller 140 to switch between the composite position and the non-composite position along the third direction R. 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 press the first film 210 and the second film 220; when the first composite roller 140 is in the non-composite position, the distance between the first composite roller 140 and the main roller 120 is L3. The spacing is greater than L3. Furthermore, the first composite roller 140 may also have different composite positions to adapt to different materials of the second film 220 and different thickness requirements of the composite film 230.

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

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

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 .

The heating module 170 is installed on the frame 110 and may be an infrared heating module or other forms of heating modules.

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 .

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

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 for detecting 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 .

The main roller 120 may change its roller diameter due to roller temperature changes, which may cause fluctuations in the linear speed of the main roller 120. By detecting the rotation speed of the first auxiliary roller 131, the conveying speed of the first film 210 can be accurately calculated, and then the rotation speed of the main roller 120 is reversely adjusted until the conveying speed of the first film 210 meets the preset value.

Specifically, the speed measuring module 180 may 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 speed of the main roller 120 is adjusted in real time to make the first film 210 The conveying speed meets the preset value.

Through this arrangement, the rotation speed of the main roller 120 can be adjusted in real time, thereby 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.

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

The first film 210 is fed into the main roller 120 and is bent toward the outer peripheral surface 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.

The first film 210 is completely attached to the outer circumference of the main roller 120 when passing through the second auxiliary roller 132. When the first film 210 passes through the flattening section, it gradually attaches to the outer circumference of the main roller 120.

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

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;

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

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;

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, and the first film 210 and the second film 220 are fully bonded;

The composite film 230 is unloaded to be sent to the next step.

In the film composite equipment 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 phenomenon of wrinkles in the first film 210; secondly, the diameter d1 of the first composite roller 140 is smaller than the diameter D of the main roller 120, which can reduce the shear force of the first film 210 and the second film 220 at the first composite roller 140, and reduce the probability of film tearing when the first film 210 and the second film 220 are composited; thirdly, at the first composite roller A second composite roller 150 is disposed downstream of 140 to reduce the probability of film delamination and poor adhesion when the first film 210 and the second film 220 are composited by segmented pressurization. The film composite device 100 of the embodiment of the present application is used for film composite operation, and has good film composite quality.

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 it. 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims (20)

A thin film composite device, characterized in that it comprises: 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. The thin film composite device according to claim 1, characterized in that the thin film composite device further comprises: 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. The thin film composite device according to claim 2, characterized in that the thin film composite device further comprises: 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. The thin film composite equipment according to claim 3 is characterized in that the diameter of the first composite roller is d1, and the diameter of the second composite roller is d2, satisfying: d2≤d1. The thin film composite equipment according to claim 2 is 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. The thin film composite equipment according to claim 2 is characterized in that the diameter of the first composite roller is d1, the diameter of the main roller is D, and the following conditions are satisfied: d1＜D. The thin film composite device according to claim 2, characterized in that the thin film composite device further comprises: 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. The thin film composite equipment according to claim 7 is characterized in that the first composite roller is slidably mounted on the frame along a third direction through 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. The thin film composite device according to claim 2, characterized in that the thin film composite device further comprises: The heating module is used to heat the second film received by the first composite roller. 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. The thin film composite equipment according to claim 2 is 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. The thin film composite equipment according to claim 2, characterized in that the main roller is a steel roller, the first composite roller is a rubber roller, or The surface of the first composite roller is provided with a rubber layer. The thin film composite device according to claim 2, characterized in that the first thin film is a proton exchange membrane, the second thin 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. The thin film composite equipment according to any one of claims 1 to 13 is 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. The thin film composite device according to any one of claims 1 to 13, characterized in that the thin film composite device further comprises: 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. The thin film composite equipment according to claim 15 is characterized in that the speed measurement module is an encoder. The thin film composite equipment according to any one of claims 1 to 13, characterized in that the arrangement angle between the first auxiliary roller and the second auxiliary roller relative to the main roller is α, satisfying: α≤90°. The thin film composite device according to any one of claims 1 to 13, characterized in that the thin film composite device further comprises: 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. The thin film composite equipment according to claim 18 is characterized in that the number of the intermediate auxiliary rollers is multiple, and the multiple intermediate auxiliary rollers are arranged at intervals between the first auxiliary roller and the second auxiliary roller, and 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. The thin film composite equipment according to any one of claims 1 to 13 is characterized in that a flattening section is formed between the first auxiliary roller and the second auxiliary roller, and in the circumferential direction of the main roller, the flattening section occupies less than one quarter of the circumference of the main roller.