Composite device and composite foil manufacturing system

Abstract

A composite device comprises a compression roller combination, an abutting roller body and a guiding and separating roller, the compression roller combination is formed by more than two compression roller assemblies, and each compression roller assembly comprises a compression roller and a telescopic mechanism connected with the compression roller; the compression roller combination is at least used for transmitting a first material layer; the surface of the abutting roller body carries a second material layer, and the pressing roller combination and the surface of the abutting roller body are configured to jointly press the first material layer and the second material layer to obtain a composite material; the guide roller is used for pulling the composite material to leave the surface of the propping roller body; a stripping angle is formed by the guiding and separating roller, the most downstream pressing roller of the pressing roller combination and the abutting roller body, and the stripping angle is an included angle formed by a composite material segment between the pressing roller combination and the guiding and separating roller and a tangent line of the stripped position of the second material layer on the abutting roller body; and the stripping angle is 0-15 degrees. Matching among the abutting roller body, the pressing roller and the guiding and separating roller is fully achieved, and the situation that materials are torn or not completely stripped in the process from compounding to guiding and separating is avoided. Corresponding foils are promoted to be compounded and stripped, and the production yield and the production efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of composite material manufacturing equipment, and more specifically, to a composite device and a composite foil manufacturing system. Background Art

[0002] In the prior art, in the production method of composite foils, it is disclosed that a substrate and a foil are pressed on the surface of a cathode roller to obtain a composite foil; multiple identical pressing rollers arranged circumferentially along the cathode roller are used to press down to laminate the substrate layer and the foil layer; then, the composite material is taken away from the cathode roller by a downstream turning roller. However, in this process, the cooperation among the cathode roller, the pressing roller, and the turning roller is ignored. For example, when the turning amplitude is relatively large, during the above-mentioned taking-away process, since the foil on the surface of the cathode roller is usually only a few micrometers thick, tearing or incomplete peeling is likely to occur. The rejection rate increases, which is not conducive to continuous and efficient production.

[0003] Therefore, there is an urgent need in the prior art for an optimized composite device to facilitate improving the peeling effect, promoting the lamination and peeling of corresponding foils, and increasing the production yield and production efficiency. Summary of the Invention

[0004] The present invention aims to overcome at least one of the above-mentioned deficiencies in the prior art, and provides a composite device and a composite foil manufacturing system to facilitate the production of composite foils and improve the corresponding production quality.

[0005] The technical solution adopted by the present invention is that a composite device includes a pressing roller assembly, a supporting roller body, and a guiding and separating roller. The pressing roller assembly is formed by two or more pressing roller components. Each pressing roller component includes a pressing roller and a telescopic mechanism connected to the pressing roller. The pressing roller assembly at least drives a first material layer. The surface of the supporting roller body carries a second material layer. The pressing roller assembly and the surface of the supporting roller body are configured to jointly press the first material layer and the second material layer to obtain a composite material. The guiding and separating roller is used to pull the composite material away from the surface of the supporting roller body. Moreover, a peeling angle is formed among the guiding and separating roller, the most downstream pressing roller of the pressing roller assembly, and the supporting roller body. The peeling angle is the included angle formed by the composite material segment between the pressing roller assembly and the guiding and separating roller and the tangent line of the position where the second material layer on the supporting roller body is peeled off. The angle of the peeling angle is 0 to 15°.

[0006] When the first material layer travels between the pressure roller assembly and the abutting roller body carrying the second material layer, the first material layer can be pressed down onto the second material layer through the pressure roller assembly and pressed downward toward the second material layer side to achieve the lamination between the first material layer and the second material layer; further, the first material layer and / or the second material layer has adhesiveness. When at least two pressure roller assemblies are provided in the pressure roller assembly, at least two areas of lamination are achieved on the corresponding columnar side surfaces. On the one hand, it is convenient to extend the lamination time and improve the lamination quality on the premise of ensuring the continuous production of the material; on the other hand, it is also convenient to achieve different area lamination settings according to the material characteristics. After passing through the lamination area, when the second material layer is peeled off from the surface of the abutting roller body, at this time, through the peeling angle formed by the cooperation of the most downstream pressure roller assembly and the guiding roller in the pressure roller assembly, it is beneficial for the second material layer to be smoothly taken away from the abutting roller body in a manner close to the tangent line of the peeled position of the abutting roller body. Based on the 0-15° peeling angle formed by the cooperation among the three, large-angle peeling is avoided, and the output toward the peeling side is coordinated with the rotation of the abutting roller body, so that the tension increased by the winding of the pressure roller and the abutting roller body can be avoided by means of the movement direction trend of the second material layer itself, and basically only the adhesion between the second material layer and the abutting roller body needs to be overcome, which is convenient to improve the peeling effect. And when the second material layer is a metal foil layer only a few microns thick, the lamination and peeling effect of the composite device of the present application is more remarkable, and conditions such as foil layer fracture and tensile damage can be effectively reduced. Based on the composite device of the present application, it is beneficial to realize the lamination of ultra-thin materials, ensure the smooth lamination and peeling of materials, and improve the lamination yield of materials, especially for ultra-thin materials and the like.

[0007] Further, the guiding roller is arranged opposite to the abutting roller body, and the end of the guiding roller close to the abutting roller body and the peeled position of the second material layer on the abutting roller body are located on the same tangent line. Further, that is, the angle of the peeling angle is 0° at this time. At this time, the composite material can be smoothly led out along with the traveling direction of the composite material after lamination, and the rolling feeding of the abutting roller body is coordinated to smoothly and continuously output the composite material and peel it off the abutting roller body. At this peeling angle, the resistance received by the peeling can be avoided as much as possible.

[0008] Further, the telescopic direction of the telescopic mechanism is perpendicular to the corresponding abutting roller body. Further, the lamination direction of the pressure roller assembly is perpendicular to the tangent line of the corresponding abutting position of the abutting roller body. That is, when the pressure roller is controlled by the telescopic mechanism, the telescopic direction of the telescopic mechanism is perpendicular to the corresponding abutting roller body. That is, it is perpendicular to the abutting roller body for lamination. This lamination direction can fully act on the material to make the material laminated tightly. At the same time, it can also avoid the situation that the composite material deflects or slides forward / backward during the downward pressing process.

[0009] Furthermore, the roller closest to the upstream end in the roller combination is the preliminary pressing roller, and the roller closest to the downstream end in the roller combination is the finishing pressing roller. The diameter D1 of the preliminary pressing roller is less than the diameter D2 of the finishing pressing roller. In this application, the preliminary pressing roller is set to have a smaller diameter. On the one hand, it is beneficial for the preliminary pressing roller to act intensively on material compounding. On the other hand, it is convenient to provide a larger range of material entry angles, so as to adjust the corresponding material entry angles according to material characteristics, etc. And setting the diameter of the finishing pressing roller to be larger is beneficial for restricting the peeling angle, so that the composite material is peeled at a smaller peeling angle, and the composite material is slowly peeled at the finishing pressing roller. Based on this diameter design, in cooperation with the aforementioned roller combination, from the entry of the composite material to be processed into the pressing area, being pressed and peeled, all stages of the complete process have achieved targeted optimization, thereby significantly improving the material compounding quality and the export efficiency after compounding, and being applicable to a wide range of materials, including ultra-thin materials, etc.

[0010] Furthermore, one or more intermediate pressing rollers are provided between the preliminary pressing roller and the finishing pressing roller; the diameter D3 of the intermediate pressing roller is greater than the diameter D1 of the preliminary pressing roller, and the diameter D3 of the intermediate pressing roller is less than or equal to the diameter D2 of the finishing pressing roller; or, the diameter D3 of the intermediate pressing roller is less than or equal to the diameter D1 of the preliminary pressing roller. Through the cooperation of the intermediate pressing roller with the preliminary pressing roller and the finishing pressing roller, the diameter can be used to further achieve multi-stage compounding and corresponding adjustment during the compounding process, and further improve the compounding quality.

[0011] Furthermore, among the combination of pressure rollers, the pressure roller near the upstream end is the preliminary pressing roller, and the pressure roller near the downstream end is the finishing pressing roller; the pressure roller assembly in the combination of pressure rollers is configured such that the downward pressure F1 of the preliminary pressing roller > the downward pressure F2 of the finishing pressing roller. By setting F1 > F2, when the composite material to be processed reaches the preliminary pressing roller and starts to be laminated, the preliminary pressing roller provides a strong lamination pressure, thereby tightly laminating the composite layer in the initial lamination state, maintaining sufficient stretching of the composite material in the lamination area, and squeezing out the possible gaps or bubbles at the composite interface towards the upstream input side, thus ensuring that the composite interface of the composite layer passing through the preliminary pressing roller is completely adhered and basically free of obvious bubbles, gaps, etc., improving the lamination quality; while the finishing pressing roller provides a lamination pressure F2 that is less than F1, which can avoid excessive stretching caused by strong tensions on both the front and back sides of the composite layer, and avoid wrinkles caused by elastic contraction after passing through the lamination section; there may still be very few air gaps that basically do not affect the performance of the composite layer microscopically in the composite layer passing through the preliminary pressing roller. If the finishing pressing roller also maintains a strong lamination pressure, it may squeeze the air gaps towards the upstream, that is, between the preliminary pressing roller and the finishing pressing roller. As the production process progresses, obvious bubbles or wrinkles will continue to accumulate in multiple areas of the composite layer finished product; this will significantly affect the quality of the final product formed. On the other hand, setting F2 < F1 is also beneficial for the export and peeling of the composite layer. The reduction of the lamination pressure of the finishing pressing roller compared to the upstream one is conducive to reducing the adhesion degree of the second material layer on the corresponding supporting roller body, facilitating the detachment of the already laminated second material layer from the corresponding roller body along the transmission direction. If F2 is a strong lamination pressure, then as the material advances, the second material is likely to stick to the corresponding supporting roller body, and it is prone to tearing and other conditions during the export of the composite layer due to uneven stress as the material is transmitted. The pressure includes the pressure when the corresponding pressure roller acts on its surface perpendicular to the supporting roller body.

[0012] Furthermore, there is one or more intermediate pressing rollers provided between the initial pressing roller and the final pressing roller; in the roller combination, the pressing pressure F1 of the initial pressing roller pressing down > the pressing pressure F2 of the final pressing roller pressing down, and the pressing pressure F1 of the initial pressing roller pressing down > the pressing pressure F3 of the intermediate pressing roller pressing down; and / or, in the roller combination, the pressing pressure F1 of the initial pressing roller pressing down > the pressing pressure F3 of the intermediate pressing roller pressing down > the pressing pressure F2 of the final pressing roller pressing down, and the pressing pressures of the initial pressing roller, the intermediate pressing roller, and the final pressing roller decrease in sequence, and the decreasing ratio ranges from 3% to 20%. That is, F1×3% < F1 - F3 < F1×20%, and F3×3% < F3 - F2 < F3×20%. Further, the decreasing ratio range is 5% to 15%, F1×5% < F1 - F3 < F1×15%, and F3×5% < F3 - F2 < F3×15%. Further, the magnitudes of F1, F2, and F3 are in the range of 0.1 N / in to 10 N / in (0.1 N per inch to 10 N per inch). The initial pressing roller applies a relatively large pressing pressure at the initial stage of lamination, so that the force is concentrated in the pressing area to fully laminate while excluding air bubbles from entering. The final pressing roller assists in laminating to strengthen the bonding strength of the composite layer. In addition to extending the lamination area of the composite layer during travel, the final pressing roller can also slowly release the composite layer, thereby promoting it to separate from the abutting roller body and be led out. The intermediate pressing roller can at least also play an auxiliary pressing role of the final pressing roller. Preferably, its pressing pressure F3 is also less than F1. As the intermediate pressing roller, it can increase the auxiliary pressing area and further improve the lamination effect. Combining F3 less than F1, it can cooperate with the initial pressing roller and the final pressing roller to achieve a progressive slowdown in pressing and release. It provides a more diverse adjustment process, facilitating selective adjustment according to the material characteristics and lamination requirements.

[0013] Furthermore, in the roller combination, the roller near the upstream end is the initial pressing roller, and the roller near the downstream end is the final pressing roller; the surface hardness H1 of the initial pressing roller > the surface hardness H2 of the final pressing roller. When this hardness relationship is set, the initial pressing roller can make the corresponding passing composite material concentrate the force with a smaller acting area, thereby improving the effects such as air bubble discharge in the initial stage. And the decrease in the hardness of the final pressing roller is beneficial to increasing the acting area with the abutting roller body, facilitating further improvement of the pressing uniformity after the initial pressing and other operations by the aforementioned initial pressing roller. And it is also convenient to provide a buffer for the process of the composite material from being laminated to being peeled off.

[0014] Further, there is provided at least one intermediate pressing roller between the initial pressing roller and the final pressing roller; the surface hardness H1 of the initial pressing roller > the surface hardness H3 of the intermediate pressing roller; or, the surface hardness H1 of the initial pressing roller > the surface hardness H3 of the intermediate pressing roller ≥ the surface hardness H2 of the final pressing roller. The surface hardness of the roller includes the surface rubber hardness of the roller body, which is the Shore A hardness; the acting areas corresponding to the surface hardnesses of different rollers are different, and by setting them as the aforementioned H1, H3, and H2, the compounding effect can be further significantly improved. Further, the range of H1 is 45 - 55 degrees; the range of H3 is 35 - 45 degrees; the range of H2 is 25 - 35 degrees.

[0015] Another object of the present application is to provide a composite foil manufacturing system, where the composite foil includes a base material layer and a foil layer compounded on at least one side of the base material layer, and includes the aforementioned compounding device. Further, the composite foil includes a composite current collector.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows: The cooperation between the abutting roller body, the pressing roller, and the guiding roller is fully realized, avoiding the situation of tearing or incomplete peeling during the process from material compounding to peeling. The peeling effect is improved, promoting the compounding and peeling of the corresponding foil, and increasing the production yield and production efficiency. It is particularly beneficial for realizing the compounding of ultra-thin materials, ensuring the smooth compounding and peeling of ultra-thin materials. And based on the further cooperation of the diameter, hardness, and pressing roller pressure, the regulation and control of the entire stage from the beginning to the end of compounding can be achieved. Compared with the prior art, the entire compounding process has been significantly improved. It can significantly improve the material compounding effect. Even for composite materials with a thickness of several micrometers, obvious bubbles, wrinkles, etc. can be effectively avoided, facilitating the production of high-quality composite foils and conducive to realizing industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cooperation structure of the guiding roller, the pressing roller combination, and the guiding roller in the compounding device of the present application.

[0018] Figure 2 It is a schematic diagram (I) of the structure of the compounding device of the present application.

[0019] Figure 3 It is a three-dimensional structure diagram of the cooperation of the guiding roller, the pressing roller combination, and the guiding roller in the compounding device of the present application.

[0020] Figure 4 It is a schematic diagram (II) of the structure of the compounding device of the present application.

[0021] Figure 5 It is a schematic diagram (III) of the structure of the compounding device of the present application.

[0022] Figure 6 It is a schematic diagram (IV) of the structure of the compounding device of the present application.

[0023] Description of the drawings: Composite device 3000, feeding roller 3101, height adjusting mechanism 3102, discharging roller 3103, support beam 3111, side plate 3112, pressure roller assembly 3120, pressure roller 31211, telescopic mechanism 31212, preliminary pressing roller 3121A, final pressing roller 3121B, transitional pressing roller 3121C, abutting roller body 4100, first material layer 5100, second material layer 5200, composite material 5300, peeling angle α. Detailed implementation manners

[0024] The drawings of the present invention are only for illustrative purposes and should not be construed as a limitation to the present invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0025] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings and specific implementation manners. However, those skilled in the art will understand that the following described embodiments are some embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention and should not be regarded as a limitation to the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention. For those conditions not specified in the embodiments, they shall be carried out according to the conventional conditions or the conditions recommended by the manufacturers. The reagents or instruments not specified by the manufacturers can be obtained as conventional products through commercial purchase. Embodiment 1

[0026] As Figure 1 、 2As shown in the figure, this embodiment discloses a composite device 3000, including a pressure roller combination 3120, a holding roller body 4100, and a guiding roller 3103. The pressure roller combination 3120 is formed by two or more pressure roller assemblies. Each pressure roller assembly includes a pressure roller 31211 and a telescopic mechanism 31212 connected to the pressure roller 31211. The pressure roller combination 3120 is at least used to drive the first material layer 5100. The surface of the holding roller body 4100 carries a second material layer 5200. The surface of the pressure roller combination 3120 and the holding roller body 4100 are configured to jointly press the first material layer 5100 and the second material layer 5200 to obtain a composite material 5300. The guiding roller 3103 is used to pull the composite material 5300 away from the surface of the holding roller body 4100. Moreover, the guiding roller 3103, the lowermost pressure roller 31211 of the pressure roller combination 3120, and the holding roller body 4100 form a peeling angle α. The peeling angle α is the angle formed by the segment of the composite material 5300 between the pressure roller combination 3120 and the guiding roller 3103 and the tangent line of the peeled position of the second material layer 5200 on the holding roller body 4100. The angle of the peeling angle α is 0° to 15°. In this embodiment, the telescopic direction of the telescopic mechanism 31212 is perpendicular to the corresponding holding roller body 4100. That is, the pressing direction of the pressure roller assembly is perpendicular to the tangent line of the corresponding holding position of the holding roller body 4100.

[0027] When the first material layer 5100 travels between the pressure roller combination 3120 and the holding roller body 4100, the pressure roller combination 3120 can press down the first material layer 5100 onto the second material layer 5200 wound on the surface of the holding roller body 4100 and press it downward toward the second material layer 5200 side to achieve the adhesion between the first material layer 5100 and the second material layer 5200. Further, the first material layer 5100 and / or the second material layer 5200 has adhesiveness. After passing through the composite area, when peeling the second material layer 5200 from the surface of the lowermost pressure roller assembly of the pressure roller combination 3120 and the holding roller body 4100, at this time, the peeling angle α formed by cooperating with the guiding roller 3103 is conducive to the second material layer 5200 being gradually taken away from the holding roller body 4100 smoothly and in a manner close to the tangent line of the peeled position of the holding roller body 4100. Based on the 0° to 15° peeling angle α formed by the cooperation among the three, the peeling is smooth.

[0028] As Figure 3 As shown in the figure, in this embodiment, the pressure roller combination 3120 is installed on an installation bracket. The installation bracket includes a support beam 3111 and side plates 3112 on both sides of the support beam 3111. Moreover, in order to facilitate the introduction of the first material layer 5100, the composite device 3000 of this embodiment is also provided with an introduction roller 3101, and a height adjustment mechanism 3102 is connected to the end of the introduction roller 3101. The upstream first material layer 5100 travels to the pressure roller combination 3120 through the introduction roller 3101.

[0029] Among the pressure roller assemblies 3120, the pressure roller 31211 near the upstream end is the preliminary pressing roller 3121A, and the pressure roller 31211 near the downstream end is the finishing pressing roller 3121B. The diameter D1 of the preliminary pressing roller 3121A < the diameter D2 of the finishing pressing roller 3121B. And there is more than one intermediate pressing roller 3121C provided between the preliminary pressing roller 3121A and the finishing pressing roller 3121B; the diameter D3 of the intermediate pressing roller 3121C > the diameter D1 of the preliminary pressing roller 3121A, and the diameter D3 of the intermediate pressing roller 3121C ≤ the diameter D2 of the finishing pressing roller 3121B; in addition, various matching methods can also be set, including the diameter D3 of the intermediate pressing roller 3121C ≤ the diameter D1 of the preliminary pressing roller 3121A, etc. As Figures 4 - 6 shown, different diameter matching methods are shown to perform pressing in cooperation with other pressing requirements or material characteristics. Importantly, in this application, the range of D1 is 120 - 180 mm, and the range of D2 is 180 - 200 mm; under the range of the larger diameter D2 of the finishing pressing roller 3121B, the larger D2 diameter can cooperate to limit the peeling angle α of the composite material 5300 after passing through the pressing position within a small angle range, so as to facilitate the peeling at the aforementioned peeling angle α.

[0030] In this embodiment, in order to improve the composite effect, the pressing pressure F1 of the preliminary pressing roller 3121A in the pressure roller assembly 3120 > the pressing pressure F2 of the finishing pressing roller 3121B. Set as F1 > F2. When the composite material 5300 to be processed reaches the preliminary pressing roller 3121A for composite, the preliminary pressing roller 3121A provides a strong pressing pressure, so as to tightly press the composite layer in the initial fitting state, and keep the composite material 5300 in the pressing area fully stretched, and squeeze out the possible gaps or bubbles at the composite interface to the upstream input side; while the finishing pressing roller 3121B provides a pressing pressure F2 less than F1, reducing the fitting degree of the wound second material on the corresponding abutting roller body 4100, and facilitating the detachment of the already composite second material layer 5200 from the corresponding roller body along the transmission direction. And when there is more than one intermediate pressing roller 3121C between the preliminary pressing roller 3121A and the finishing pressing roller 3121B, as Figure 4As shown, in the press roller assembly 3120, the press roller assembly can be configured such that the downward pressure F1 of the preliminary pressing roller 3121A > the downward pressure F2 of the final pressing roller 3121B, and the downward pressure F1 of the preliminary pressing roller 3121A > the downward pressure F3 of the transition pressing roller 3121C; specifically, in the press roller assembly 3120, the press roller assembly is configured such that the downward pressure F1 of the preliminary pressing roller 3121A > the downward pressure F3 of the transition pressing roller 3121C > the downward pressure F2 of the final pressing roller 3121B, and the downward pressures of the preliminary pressing roller 3121A, the transition pressing roller 3121C, and the final pressing roller 3121B decrease in sequence, and the decreasing ratio ranges from 3% to 20%. That is, F1×3% < F1 - F3 < F1×20%, F3×3% < F3 - F2 < F3×20%. To further improve the effect, the decreasing ratio range can be set to 5% to 15%, F1×5% < F1 - F3 < F1×15%, F3×5% < F3 - F2 < F3×15%.

[0031] In addition to directly improving the pressing force, it can also be further improved in terms of hardness. For example, the surface hardness H1 of the preliminary pressing roller 3121A is set > the surface hardness H2 of the final pressing roller 3121B. When there is more than one transition pressing roller 3121C between the preliminary pressing roller 3121A and the final pressing roller 3121B, the surface hardness H1 of the preliminary pressing roller 3121A > the surface hardness H3 of the transition pressing roller 3121C; or, the surface hardness H1 of the preliminary pressing roller 3121A > the surface hardness H3 of the transition pressing roller 3121C ≥ the surface hardness H2 of the final pressing roller 3121B. In this embodiment, the range of H1 is 45 to 55 degrees; the range of H3 is 35 to 45 degrees; the range of H2 is 25 to 35 degrees. Embodiment 2

[0032] This embodiment discloses a composite device 3000, as Figure 4 shown. The difference from Embodiment 1 is that in this embodiment, the peeling is directly based on the peeling angle α being 0°; at this time, the guiding roller 3103 and the abutting roller body 4100 are oppositely arranged, and the end of the guiding roller 3103 close to the abutting roller body 4100 and the position where the second material layer 5200 on the abutting roller body 4100 is peeled are located on the same tangent line; that is, the angle of the peeling angle α is 0° at this time. The composite material 5300 is guided out along the advancing direction of the composite material 5300 after lamination, and in cooperation with the rolling feeding of the abutting roller body 4100, the composite material 5300 is smoothly and continuously output and peeled from the abutting roller body 4100. Embodiment 3

[0033] This embodiment discloses a composite device 3000, which is different from Embodiment 1 in that: in this embodiment, the diameter D2 of the end pressing roller 3121B is set to 80 mm, and a peeling roller is configured to perform peeling at an angle of the peeling angle α of 60°. The peeling is repeated twenty times in both this embodiment and Embodiment 1. The first material layer includes a 4-μm PET film, and the PET film carries a 2-μm adhesive layer. The second material layer is a 1.8-μm copper foil layer. The proportion of the fracture condition occurring during the peeling process is compared. The results show that no fracture condition occurred during the production process of the composite device 3000 in Embodiment 1, while 2 peeling fractures and 1 peeling damage condition occurred in this embodiment. That is, based on the composite device 3000 in Embodiment 1, problems such as fracture and incomplete peeling that are likely to occur during the composite process of such ultra-thin layer structures can be solved. Embodiment 4

[0034] This embodiment discloses a composite foil manufacturing system. The composite foil includes a base material layer and a foil layer composite on at least one side of the base material layer, and includes the aforementioned composite device 3000. Specifically, the composite foil may include a composite current collector, and the composite current collector includes at least a base material layer and foil layers composite on both sides of the base material layer. The aforementioned first material layer 5100 may be a film base material layer attached with an adhesive layer, and the second material layer 5200 may be a foil layer.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solutions of the present invention, rather than limitations on the specific implementation manners of the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the claims of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A composite device, characterized in that, It includes a pressure roller combination, a supporting roller body and a guiding roller. The pressure roller combination is formed by two or more pressure roller assemblies. Each pressure roller assembly includes a pressure roller and a telescopic mechanism connected to the pressure roller. The pressure roller combination is at least used to drive a first material layer. The surface of the supporting roller body carries a second material layer. The pressure roller combination and the surface of the supporting roller body are configured to jointly press the first material layer and the second material layer to obtain a composite material. The guiding roller is used to pull the composite material away from the surface of the supporting roller body. And a peeling angle is formed among the guiding roller, the most downstream pressure roller of the pressure roller combination and the supporting roller body. The peeling angle is the included angle formed by the composite material segment between the pressure roller combination and the guiding roller and the tangent line of the position where the second material layer on the supporting roller body is peeled off. The angle of the peeling angle is 0 to 15°.

2. The composite device according to claim 1, wherein, The pressure roller near the upstream end in the pressure roller combination is a preliminary pressing roller, and the pressure roller near the downstream end in the pressure roller combination is a finishing pressing roller. The diameter D1 of the preliminary pressing roller < the diameter D2 of the finishing pressing roller.

3. The composite device according to claim 2, characterized in that, One or more intermediate pressing rollers are further provided between the preliminary pressing roller and the finishing pressing roller. The diameter D3 of the intermediate pressing roller > the diameter D1 of the preliminary pressing roller, and the diameter D3 of the intermediate pressing roller ≤ the diameter D2 of the finishing pressing roller.

4. The composite device according to claim 2, characterized in that, The diameter D3 of the intermediate pressing roller ≤ the diameter D1 of the preliminary pressing roller.

5. The composite device according to any one of claims 1 to 4, characterized in that And the pressure roller near the upstream end in the pressure roller combination is a preliminary pressing roller, and the pressure roller near the downstream end in the pressure roller combination is a finishing pressing roller. The downward pressure F1 of the preliminary pressing roller in the pressure roller combination > the downward pressure F2 of the finishing pressing roller.

6. The composite device according to claim 5, characterized in that, One or more intermediate pressing rollers are further provided between the preliminary pressing roller and the finishing pressing roller. The downward pressure F1 of the preliminary pressing roller in the pressure roller combination > the downward pressure F2 of the finishing pressing roller, and the downward pressure F1 of the preliminary pressing roller > the downward pressure F3 of the intermediate pressing roller; and / or, the downward pressure F1 of the preliminary pressing roller in the pressure roller combination > the downward pressure F3 of the intermediate pressing roller > the downward pressure F2 of the finishing pressing roller, and the downward pressures of the preliminary pressing roller, the intermediate pressing roller and the finishing pressing roller decrease in sequence, and the decreasing ratio range is 3% to 20%.

7. The composite device according to any one of claims 1 to 6, characterized in that The pressure roller near the upstream end in the pressure roller combination is a preliminary pressing roller, and the pressure roller near the downstream end in the pressure roller combination is a finishing pressing roller. The surface hardness H1 of the preliminary pressing roller > the surface hardness H2 of the finishing pressing roller.

8. The composite device according to claim 7, wherein One or more intermediate pressing rollers are further provided between the preliminary pressing roller and the finishing pressing roller. The surface hardness H1 of the preliminary pressing roller > the surface hardness H3 of the intermediate pressing roller; or, the surface hardness H1 of the preliminary pressing roller > the surface hardness H3 of the intermediate pressing roller ≥ the surface hardness H2 of the finishing pressing roller.

9. The composite device according to claim 8, characterized in that, The range of H1 is 45 to 55 degrees; the range of H3 is 35 to 45 degrees; the range of H2 is 25 to 35 degrees.

10. A composite foil manufacturing system, wherein the composite foil comprises a substrate layer and a foil layer laminated on at least one side of the substrate layer, characterized in that, It includes the composite device according to any one of claims 1 to 9.

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