Composite current collector production system
Through the optimized design of integrated roll pressing device and unwinding system, the problem of expensive equipment and intimate composite composites in the production of composite fluids is solved, and high-quality composite materials are achieved.
Patent Information
- Application Number
- CN202421393227.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-06-18
AI Technical Summary
The existing composite fluid production system equipment is expensive and the composite process is complex, and it is prone to problems such as bubbles and gaps, which affects product quality.
An integrated pressing roller device is adopted, including a preliminary pressing roller, a finishing pressing roller and a transition pressing roller. By adjusting the pressing pressure and the hardness of the roller surface, a progressive composite is achieved, and combined with the tension adjustment and guidance system of the unwinding device, ensuring the material is flat and tightly fit.
Reduce production costs, improve the quality of composite fluid collection, reduce bubbles and gaps, and obtain high-quality composite materials with flat surfaces.
Smart Images
Figure CN223260611U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of composite current collectors, and more specifically, to a composite current collector production system. Background Art
[0002] With the development of material preparation technology, more and more composite materials are replacing original metal materials, playing an important role in lithium-ion batteries. Among them, the progress of composite current collectors replacing traditional lithium battery copper foil current collectors is particularly rapid. At present, most common composite current collector production methods are based on magnetron sputtering and other methods to make the metal foil layer adhere to the substrate, and combine water electroplating and other methods to obtain the composite current collector. In order to realize this type of production process, the equipment required is usually relatively expensive, and the overall preparation process is complicated, and the production cost of the production system is high. For this reason, the prior art proposes a production process and a corresponding system for attaching a metal foil layer by coating a glue solution online on the substrate. This type of system composites the adhered sticky substrate with the foil material. However, since the thickness of common composite current collectors is only a few microns to tens of microns, the requirements for all aspects of the composite finished product are high, and slight changes will significantly affect the performance; the surface flatness, the quality of the bonding between the metal foil layer and the substrate, etc. have a significant impact on the composite current collector, and the process of bonding the adhesive substrate and the foil layer will directly affect the flatness and bonding quality; in this process, if the fixed rolling gap between the rollers of the existing technology is directly used to directly bond and then export, without adjusting the characteristics of the metal foil layer and the production process, it is easy to have problems such as loose bonding and bubbles in the bonding interface.
[0003] Therefore, the existing technology urgently needs a corresponding composite current collector production system suitable for utilizing adhesive bonding of metal foil layers, which can improve the bonding effect in combination with the bonding process and minimize the deficiencies in the bonding composite process, such as bubbles and gaps, so as to obtain a higher quality composite current collector. Utility Model Content
[0004] The present invention aims to overcome at least one of the shortcomings of the above-mentioned prior art and provide a composite current collector production system with low production cost, easy mass production, and the ability to combine the bonding process to improve the bonding effect and avoid problems such as bubbles and gaps in the composite layer as much as possible, so as to obtain a higher quality composite current collector.
[0005] The technical solution adopted by the present invention is a composite current collector production system, comprising: a reeling system, at least for reeling off a first material layer; an integrated pressure roller device, located downstream of the reeling device, comprising a pressure roller combination, wherein the pressure roller combination is formed by two or more pressure roller assemblies, the pressure roller assembly comprising a pressure roller and a telescopic mechanism connected to the pressure rollers, the pressure roller combination in the integrated pressure roller device is at least for transmitting the first material layer; and the pressure roller assemblies in the pressure roller combination are arranged circumferentially along the surface of the cathode roller; the cathode roller is at least for generating a second material layer, which is a metal foil layer; the pressure roller combination and the cathode roller surface are configured so that the surface of the cathode roller The supporting surface is used as the pressure roller combination to press the first material layer and the second material layer to the surface of the cathode roller to obtain a composite material; the composite material includes the local structure of the composite current collector, such as the composite foil layer, and also includes the composite current collector as a whole; the detent roller is used to pull the composite material away from the surface of the cathode roller; and the pressure roller near the upstream end of the pressure roller combination is the initial pressing roller, and the pressure roller near the downstream end of the pressure roller combination is the finishing pressing roller; the pressure roller assembly in the pressure roller combination is configured so that the initial pressing roller pressure F1 is greater than the finishing pressing roller pressure F2; the pressing pressure at least includes the pressure when the pressure roller acts vertically on the surface of the cathode roller at the corresponding position.
[0006] The pressure roller assembly is arranged circumferentially along the surface of the abutting roller body, adapting to the cylindrical side surface of a rolled or wound material. When a first material layer passes between the pressure roller assembly and the wound material, the pressure roller assembly presses the first material layer onto the wound second material layer and presses downward toward one side of the second material layer to achieve adhesion between the first and second material layers. Furthermore, the first and / or second material layers are adhesive. When the pressure roller assembly comprises at least two pressure roller assemblies, at least two areas of the corresponding cylindrical side surface are pressed together. This not only facilitates extending the pressing time and improving the pressing quality while ensuring continuous material production, but also facilitates the configuration of different areas for pressing according to material properties. In situations where the distance between the pressure roller assembly and the abutting surface, such as the roller body surface, remains substantially constant, the telescopic mechanism at least maintains and adjusts the telescopic length to ensure a relatively stable pressing pressure. For example, in the case of abutting rollers such as cathode rollers producing a metal foil layer on their surface, the distance between the pressure roller and cathode roller remains substantially constant during the lamination process. However, the telescopic mechanism does not only stretch to provide pressure when pressing is required. Its applicable scenarios are more extensive. For example, as the thickness of the wound material decreases as the wound material is compounded and released, the diameter of the cylindrical structure including the loaded wound material decreases. The following abutting roller body also includes this type of cylindrical structure. In this case, the telescopic mechanism adjusts the extension length in a timely manner during the production process, and adjusts the extension length as it is released to maintain the state of abutting the corresponding abutting roller surface, thereby ensuring a relatively constant downward pressure. Furthermore, the roller components in the pressure roller combination are arranged circumferentially along the surface of the abutting roller body. At least when the telescopic mechanism is in the contracted state, the telescopic mechanism is also arranged circumferentially accordingly. This is beneficial to use the same telescopic mechanism to adapt to pressing at multiple locations on the arc-shaped side of the cylindrical side of the abutting roller body, while reducing the difficulty of controlling different roller components in the corresponding device control program. The integrated pressure roller device of the present application can fully fit the cathode roller and compound the foil on the surface of the cathode roller, avoiding tearing and other conditions caused by the transmission of micron-level foil, and the surface of the composite material is smooth.
[0007] Furthermore, the first material layer is a substrate layer with an adhesive surface; or, alternatively, the first material layer is a substrate layer coated with an adhesive layer. For a thinner second material layer, the adhesive first material layer can be peeled off from the corresponding roller after lamination. The adhesive property can be achieved by the first material layer's own surface adhesiveness or by coating the first material layer with an adhesive layer, which is then laminated to the second material layer. Furthermore, the second material layer is a foil such as copper foil.
[0008] Set F1 > F2. When the待 composite materials all reach the preliminary compaction roller for lamination, the preliminary compaction roller provides a strong compaction pressure, thereby tightly compressing the composite layer in the initial lamination state, maintaining sufficient stretching of the composite materials in the compaction area, and squeezing out any 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 compaction roller is fully adhered and basically free of obvious bubbles, gaps, etc., improving the lamination quality; while the finishing compaction roller provides a compaction pressure of F2 which 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 compaction section; at the same time, avoid continuous accumulation of obvious air gaps, etc. Because the composite layer passing through the preliminary compaction roller may still have extremely few air gaps at the microscopic level that basically do not affect the performance of the composite layer. If the finishing compaction roller also maintains a strong compaction pressure, it may squeeze the air gaps upstream, that is, between the preliminary compaction roller and the finishing compaction roller. As the production process progresses, it will continuously accumulate to form obvious bubbles or wrinkles 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 separation of the composite layer. The decrease in the compaction pressure of the finishing compaction roller compared to the upstream one is conducive to reducing the adhesion degree of the wound material on the corresponding abutting roller body, facilitating the detachment of the wound material that has been laminated from the corresponding roller body along the transmission direction. If F2 is a strong compaction pressure, it may cause the wound material to easily stick to the corresponding abutting roller body as the material advances, 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 downward compaction pressure includes the pressure when the corresponding compaction roller acts vertically on the surface of the abutting roller body.
[0009] Further, the compaction roller combination includes more than three compaction rollers, including a preliminary compaction roller, a finishing compaction roller, and more than one intermediate compaction roller located between the preliminary compaction roller and the finishing compaction roller; the compaction roller assemblies in the compaction roller combination are configured such that the downward compaction pressure F1 of the preliminary compaction roller > the downward compaction pressure F2 of the finishing compaction roller, and the downward compaction pressure F1 of the preliminary compaction roller > the downward compaction pressure F3 of the intermediate compaction roller. Further, F3 ≥ F2. More specifically, the compaction roller assemblies in the compaction roller combination are configured such that F1 > F3 > F2, and the downward compaction pressure decreases in the direction from preliminary compaction to finishing compaction, and the decreasing ratio ranges from 3% to 20%; that is, F1 × 3% < F1 - F3 < F1 × 20%, F3 × 3% < F3 - F2 < F3 × 20%. More specifically, the decreasing ratio ranges from 5% to 15%, F1 × 5% < F1 - F3 < F1 × 15%, F3 × 5% < F3 - F2 < F3 × 15%. Further, the magnitudes of F1, F2, and F3 are within the range of 0.1 N / in to 10 N / in (0.1 N per inch to 10 N per inch). Further, the diameter range of the compaction rollers in the compaction roller combination is 120 to 200 mm.
[0010] The initial lamination roller applies a high lamination pressure during the initial lamination phase, concentrating the force on the downward pressure area for full lamination while simultaneously eliminating air bubbles. The final lamination roller assists in laminating the composite layer, strengthening its bond strength. In addition to extending the lamination area during lamination, the final lamination roller also slowly releases the composite layer, encouraging it to detach from the abutting roller and be guided away. The transition lamination roller also serves as a secondary lamination roller, preferably with a downward pressure F3 less than F1. As an intermediate transition lamination roller, it increases the auxiliary lamination area, further enhancing the lamination effect. With F3 less than F1, the initial and final lamination rollers can achieve a progressively slower lamination and release process. This provides a more versatile adjustment process, facilitating selective adjustment based on material properties and lamination requirements. Furthermore, the surface hardness H1 of the initial lamination roller is greater than the surface hardness H2 of the final lamination roller, while the surface hardness H1 of the initial lamination roller is greater than the surface hardness H3 of the transition lamination roller. Furthermore, H3 ≥ H2; further, H1 ≥ 45 degrees; and even further, H1 > H3 > H2. Furthermore, H1 ranges from 45 to 55 degrees; H3 ranges from 35 to 45 degrees; and H2 ranges from 25 to 35 degrees. The roller surface hardness includes the rubber hardness of the roller body, measured in Shore A hardness. Different roller surface hardnesses correspond to different effective areas, and setting the aforementioned H1, H3, and H2 can significantly improve the composite effect.
[0011] Furthermore, the unwinding system includes an unwinding device, which includes an unwinding bracket and an unwinding shaft. The unwinding bracket is also provided with a tension adjustment roller, a tension detection roller, and at least one guide roller; the relative positions of the tension adjustment roller, the tension detection roller, and the guide roller are set so that the first material layer on the unwinding shaft passes through the tension adjustment roller, the tension detection roller, and the guide roller, and the first surface side of the first material layer only abuts against the surface of at most one roller among all the rollers of the tension adjustment roller, the tension detection roller, or the guide roller; the first surface side is the surface side of the first material layer used for compounding with the second material layer downstream. The unwinding device of the present application can be applied to the first material layer to be compounded with a sticky material such as an adhesive layer on the surface, which is beneficial to ensure the integrity of its surface material, etc., and improve the quality of the subsequent composite material product. Furthermore, the first material layer is a composite film roll, including a film layer and an adhesive layer, and the adhesive layer is arranged on the surface of the film layer; the first surface side is the exposed adhesive surface side of the film roll. Furthermore, when the unwinding device of the present application is used in the unwinding process before lamination, the side of the first material layer film roll used for lamination with other materials only passes through one roller surface at most, which can avoid contact with the roller surface as much as possible, thereby reducing the loss of surface material before lamination and ensuring a certain degree of flatness, such as the surface material including a preliminarily cured adhesive layer; so that in the subsequent specific lamination, the downstream material can be laminated flat, reducing bubbles and gaps between the lamination interfaces, etc., to significantly improve the quality of the finished composite material. In addition, the present application uses a tension detection roller to detect the unwinding tension in real time, and cooperates with the tension adjustment roller to adjust the unwinding tension to ensure that the unwinding surface is flat and smooth, and thus ensure that no wrinkles are generated when laminating with downstream materials. Only a small number of rollers and a specific arrangement of rollers are required to reduce the loss of the exposed adhesive surface during the unwinding process, while ensuring the effects of unwinding tension control.
[0012] Furthermore, the unwinding system includes a load-bearing bracket, an unwinding device, a first direction drive device and a second direction drive device; the first direction drive device is installed on the load-bearing bracket, and the unwinding device is installed on the first direction drive device through the second direction drive device; the first direction drive device drives the unwinding device to move in the first direction, and the second direction drive device drives the unwinding device to move in the second direction; the first direction is the unwinding direction of the unwinding device, and the second direction is the direction perpendicular to the unwinding direction of the unwinding device. The present application drives the unwinding device to deliver or receive the unwinding device through a first-direction drive device. On the one hand, it can be delivered during specific use to form a compact production system, especially providing a smaller roller distance between the unwinding device and the adjacent device, thereby improving the roller stability. On the other hand, it can be received when not in use, thereby increasing the space between the unwinding device and the adjacent device in the first direction, thereby facilitating the installation, replacement, maintenance or cleaning of the adjacent device in the first direction. At the same time, the first-direction drive device can stably move the unwinding device to avoid lateral deviation in the first direction, thereby facilitating the stabilization of the subsequent unwinding position in the first direction. The second-direction drive device can provide a deviation correction function during the unwinding process, especially after delivering or receiving the unwinding device, thereby further improving its transmission stability and accuracy. The unwinding system based on the present application can be compactly arranged while facilitating the installation and maintenance of adjacent devices. At the same time, it avoids the influence of the deviation of the unwinding end, thereby ensuring stable and accurate unwinding.
[0013] Furthermore, the first direction drive device includes a first slide rail, a first slider, a rack, a base, and a first drive motor; the first slide rail and the rack are fixed to the upper surface of the supporting bracket, the unwinding device is installed on the base, and the bottom of the base is provided with a first slider that cooperates with the first slide rail; the first drive motor is connected to a transmission shaft, and the transmission shaft is provided with a transmission gear. The first drive motor drives the transmission gear to cooperate with the rack to drive the base to move in the first direction; the second direction drive device includes a second slider, a second slide rail, and a second drive motor; the unwinding device includes a base plate, and the second slider is arranged on the lower surface of the base plate; the second slide rail and the second drive motor are fixed to the upper surface of the first direction drive device, such as the upper surface of the base; the base plate is also provided with a hollow mounting opening, the second drive motor is located in the mounting opening, and the output end of the second motor abuts against the wall of the mounting opening. The first drive motor is connected to a transmission shaft, and the transmission shaft is provided with a transmission gear. The first drive motor drives the transmission gear to cooperate with the rack to drive the base to move in the first direction. The slider and rails work together to guide the movement, and because they fit tightly together, significant deviation is avoided. Since the support bracket is typically fixed to the ground, attaching the rack and rails to the support bracket provides greater stability during installation and operation, and is less susceptible to positional shifting. Drive is provided by a drive shaft and gears, transmitting power to both sides of the unwinding device, thereby promoting smooth movement. When a film roll is placed on the unwinding device, the drive shaft and gears can overcome the heavy load and provide stable drive.
[0014] Furthermore, the base has two rearwardly extending mounting portions; the first drive motor, drive shaft, and transmission gear are all disposed between the mounting portions. The rear side of the wall panel is fixed to the mounting portions, providing a mounting location for the wall panel and facilitating the placement of the unwinding device roller. Furthermore, between the mounting portions, a space is formed for the first drive motor, drive shaft, and transmission gear, resulting in a stable and compact structure.
[0015] Furthermore, the first drive motor is a worm gear motor, positioned in the middle of the transmission shaft; the transmission shaft is provided with transmission gears on both sides of the first drive motor. Positioning the first drive motor in the middle and providing transmission gears on both sides of the first drive motor facilitates balanced drive on both sides, improving drive stability and synchronization. Furthermore, balanced drive on both sides also helps avoid wear caused by incomplete synchronization between the two sides, thereby increasing the service life of the unwinding device.
[0016] Furthermore, the second drive motor is placed horizontally on the upper surface of the base. In this application, the second drive motor is arranged in the mounting opening, eliminating the need for additional horizontal extension space for arrangement; at the same time, the horizontal rigidity of the base plate can be utilized to improve drive stability; further, the output end of the second drive motor is directly abutted against the side of the base plate mounting opening.
[0017] Furthermore, the tension adjustment roller and the tension detection roller are positioned adjacent to each other. Furthermore, in the case of an unwinding device, the tension adjustment roller and the tension detection roller are positioned sequentially in the unwinding direction. Furthermore, the guide roller is positioned before or after the tension adjustment roller and the tension detection roller. Positioning the tension adjustment roller adjacent to the tension detection roller facilitates improved accuracy in tension detection and adjustment. When the tension adjustment roller is adjusted, the adjacent tension detection roller can instantly and accurately detect the corresponding tension, facilitating more accurate tension control and adjustment. Positioning the tension adjustment roller and the tension detection roller sequentially in the unwinding direction facilitates placing the detection roller, whose position remains unchanged, closer to the downstream laminating device, thereby improving tension stability between the unwinding device and the laminating process. Alternatively, the guide roller can be positioned between the tension adjustment roller and the tension detection roller, with the tension adjustment roller positioned closer to the unwinding axis and the tension detection roller positioned further away from the unwinding axis in the unwinding direction.
[0018] Furthermore, a bottom guide roller is provided on the lower side of the supporting bracket, and a plurality of transmission guide rollers are provided above the unwinding device; the composite material is transmitted downstream through the bottom guide roller and the plurality of transmission guide rollers after being combined by the pressure rollers.
[0019] Furthermore, the first surface of the web is coated with a release film layer; the unwinding system further includes a peeling component configured to peel the release film layer before the tension adjustment roller; the peeling component simultaneously rewinds the release film layer while peeling. Furthermore, the peeling component is configured to peel the release film layer before the web passes through the tension adjustment roller and the tension detection roller. Furthermore, in the unwinding device, a guide roller, a tension adjustment roller, and a tension detection roller are sequentially arranged in the unwinding direction, and the peeling component is positioned between the tension adjustment roller and the guide roller in the rolling direction. When the first material layer is a film roll with an adhesive layer on the surface, a release film is typically required to separate the adhesive layer on the outer coil from the film layer on the inner coil to facilitate winding and storage. To facilitate direct lamination after unwinding, the release film must be peeled off in advance. During the peeling process, the release film will generate a certain degree of interference. Positioning the peeling component before the tension adjustment roller facilitates immediate adjustment based on tension changes caused by the peeling process, thereby ensuring smooth and even unwinding during peeling. The stripping component particularly needs to be arranged before the tension adjustment roller so that the tension can be adjusted back to the required tension in time using the tension adjustment roller.
[0020] Furthermore, the guide roller, tension detection roller and / or pressure roller of the unwinding device are all connected to tension sensors; when the peeling component peels or the integrated pressure roller device presses down to compound, the unwinding system adjusts the tension in real time based on the feedback data from the tension sensor to maintain a relatively stable tension.
[0021] Furthermore, the cathode roller is a cathode roller in a foil machine; the foil machine is installed underground. Furthermore, when the unwinding device extends forward in a first direction and protrudes beyond the support bracket, the foil machine is located below the unwinding device. Furthermore, the foil machine includes an electrolytic cell and a cathode roller, and the cathode roller is connected to a drive motor at its end, and the cathode roller is driven to rotate by the drive motor connected to the end. A conductive copper ring is also provided on the drive shaft connecting the cathode roller and the drive motor.
[0022] The integrated roller assembly further includes a passivation tank, squeeze rollers, a spray chamber, a hot air device, and / or a drying chamber downstream of the integrated roller assembly. Furthermore, after sequentially passing through the passivation tank, squeeze rollers, spray chamber, hot air device, and drying chamber, the material reaches the winding device for winding. Furthermore, the winding device is configured to wind the material so that the foil layer is located on the inside of the coil.
[0023] Another object of the present invention is to provide a composite current collector produced by the aforementioned composite current collector production system. The composite current collector has tightly bonded material layers, is not easily separated, and has a smooth composite interface; and has excellent composite current collector performance.
[0024] Compared with the prior art, the beneficial effects of the present application are as follows: based on the composite current collector production system described in the present application, it can be applied to the composite of ultra-thin foil materials in the composite current collector production process, and composite can be achieved under the premise of avoiding the transmission of ultra-thin materials, so as to obtain high-quality composite materials with tight composite and smooth surface. The overall composite current collector production system has a simple structure, is easy to deploy and install, and the resulting composite product has corresponding good performance. It is not only convenient for compact deployment and installation, but also promotes the production of high-quality composite current collectors through corresponding structures at least in the unwinding and composite process before composite. It includes utilizing the structural characteristics of the unwinding device to avoid the loss of surface material before composite and to ensure a certain degree of flatness. The surface material includes a preliminarily solidified adhesive layer; so that in the subsequent specific composite, the downstream materials can be flatly bonded, and bubbles and gaps between the bonding interfaces are reduced, so as to significantly improve the quality of the finished composite material. It also includes achieving progressive composite through a combination of pressure rollers to further improve the quality of the composite current collector. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 This is a schematic diagram of the coordination between the unwinding system and the composite system of the composite current collector production system of this application;
[0026] Figure 2This is a schematic diagram of the working state of the unwinding system and the composite system of the composite current collector production system of this application;
[0027] Figure 3 This is a schematic diagram of the structure of the integrated pressure roller device of this application (1);
[0028] Figure 4 This is a schematic diagram of the structure of the integrated pressure roller device of this application (II);
[0029] Figure 5 This is a schematic diagram of the composite system structure of this application (I);
[0030] Figure 6 This is a schematic diagram of the composite system structure of this application (II);
[0031] Figure 7 This is a schematic diagram of the structure of the initial pressing roller, transition pressing roller, and final pressing roller of the integrated pressing roller device of this application;
[0032] Figure 8 This is a schematic diagram of the structure of the unwinding device and the integrated pressure roller device in this application;
[0033] Figure 9 Schematic diagram of the unwinding device structure for this application
[0034] Figure 10 A schematic diagram of the structure of the unwinding device for loading the film roll in this application;
[0035] Figure 11 This is a schematic diagram of the unwinding system structure for this application;
[0036] Figure 12 This is a schematic diagram of the first direction drive device structure of the unwinding system of this application (I);
[0037] Figure 13 This is a schematic diagram of the first direction drive device structure of the unwinding system of this application (II);
[0038] Figure 14 This is a schematic diagram of the structure of the second direction drive device of the unwinding system of this application (1);
[0039] Figure 15 This is a schematic diagram of the structure of the second direction drive device of the unwinding system of this application (II);
[0040] Figure 16 This is a schematic diagram of the overall structure of the composite current collector production system and process of this application;
[0041] Description of the drawings: unwinding system 1000, unwinding device 1100, unwinding bracket 1110, bottom plate 1111, wall panel 1112, unwinding shaft 1120, tension adjustment roller 1130, tension detection roller 1140, tension sensor 1141, guide roller 1150, film roll 2000, first surface side 201, peeling component 1200, supporting bracket 1300, first slide rail 1410, first slider 1420, rack 1430, base 1440, first drive motor 1450, transmission shaft 1460, transmission gear 1470, second slider 1510, second slide rail 1520, The second drive motor 1530, the composite system 3000, the integrated pressing roller device 3100, the introduction roller 3101, the height adjustment mechanism 3102, the guide roller 3103, the pressing roller combination 3120, the pressing roller 31211, the telescopic mechanism 31212, the preliminary pressing roller 3121A, the final pressing roller 3121B, the transition pressing roller 3121C, the raw foil machine 4000, the supporting roller body 4100, the first material layer 5100, the second material layer 5200, the composite layer 5300, the passivation tank 6100, the extrusion roller 6200, the spray chamber 6300, the hot air device 6400, and the drying chamber 6500. DETAILED DESCRIPTION
[0042] The drawings in this utility model are for illustrative purposes only and are not to be construed as limiting the scope of this utility model. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the products. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.
[0043] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.
[0044] Example 1
[0045] like Figures 1 to 4As shown, this embodiment discloses a composite current collector production system, including: an unwinding system 1000, at least for unwinding a first material layer 5100; an integrated pressure roller device 3100, located downstream of the unwinding system 1000, including a pressure roller combination 3120, the pressure roller combination 3120 is formed by two or more pressure roller assemblies, the pressure roller assembly includes a pressure roller 31211 and a telescopic mechanism 31212 connected to the pressure roller 31211, the pressure roller combination 3120 in the integrated pressure roller device 3100 is at least used to transmit the first material layer 5100; and the pressure roller assembly in the pressure roller combination 3120 is along the cathode roller 41 00 surface is arranged circumferentially; the cathode roller 4100 is at least used to generate the second material layer 5200, and the second material layer 5200 is a metal foil layer; the pressing roller combination 3120 and the surface of the cathode roller 4100 are configured such that the surface of the cathode roller 4100 is used as the support surface, and the pressing roller combination 3120 presses the first material layer 5100 and the second material layer 5200 to the surface of the cathode roller 4100 to obtain a composite material; the composite material includes a local structure of the composite current collector, such as a composite foil layer, and also includes the composite current collector as a whole; the decoupling roller 3103 is used to pull the composite material away from the surface of the cathode roller 4100; and as Figure 7 As shown, the pressure roller 31211 near the upstream end of the pressure roller combination 3120 is the preliminary pressure roller 3121A, and the pressure roller 31211 near the downstream end of the pressure roller combination 3120 is the finishing pressure roller 3121B; the pressure roller assembly in the pressure roller combination 3120 is configured so that the downward pressure F1 of the preliminary pressure roller 3121A is greater than the downward pressure F2 of the finishing pressure roller 3121B; the downward pressure at least includes the pressure when the pressure roller 31211 acts vertically on the surface of the cathode roller 4100 at the corresponding position.
[0046] The unwinding system 1000 unwinds the first material layer 5100, and maintains its unwinding direction and the tension of the first material layer 5100 during the unwinding process to keep it in a flat state; when the first material layer 5100 moves between the pressure roller assembly 3120 and the winding material, as shown in FIG. Figures 5-7As shown, the integrated pressing roller assembly 3100 and the cathode roller 4100 cooperate to form a composite system 3000. The pressing roller assembly 3120 presses the first material layer 5100 onto the wound second material layer 5200, pressing downward toward one side of the second material layer 5200, with the corresponding roller surface of the cathode roller 4100 serving as support to achieve lamination between the first and second material layers 5100, 5200. After lamination, the decoupling roller 3103 pulls the laminated portion away from the pressing roller assembly 3120 and the cathode roller 4100, specifically driving the second material layer 5200 away from the roller surface of the cathode roller 4100. In this embodiment, the first material layer 5100 is adhesive, allowing for direct lamination with the second material layer 5200. Specifically, the first material layer 5100 is a substrate layer having an adhesive surface; alternatively, the first material layer 5100 is a substrate layer coated with an adhesive layer. For the thinner second material layer 5200, the first material layer 5100 with adhesiveness can be peeled off from the corresponding roller body after lamination; the second material layer 5200 is a foil such as copper foil. Set to F1>F2, when the composite materials to be composited reach the preliminary lamination roller 3121A for lamination, the preliminary lamination roller 3121A provides strong lamination pressure, thereby tightly laminating the composite layer 5300 in the initial lamination state, and maintaining the full stretch of the composite materials in the lamination area, and squeezing out any gaps or bubbles that may exist in the composite interface to the upstream input side, ensuring that the composite interface of the composite layer 5300 passing through the preliminary lamination roller 3121A is completely laminated, and basically does not contain obvious bubbles, gaps, etc., thereby improving the lamination quality. Quality; the finishing laminating roller 3121B provides a laminating pressure of F2 which is less than F1, which can avoid excessive stretching caused by strong tension on the front and rear sides of the composite layer 5300, and avoid wrinkles caused by elastic contraction after passing through the laminating interval; F2<F1 is also beneficial to the derivation and separation of the composite layer 5300. The finishing laminating roller 3121B has a lower laminating pressure than the upstream roller, which can reduce the degree of adhesion of the winding material on the corresponding supporting roller cathode roller 4100, making it easier for the composite winding material to separate from the corresponding roller body along the transmission direction.
[0047] After the unwinding reaches the laminating area, it is transferred to the pressing roller assembly 3120 via the introduction roller 3101; the end of the introduction roller is connected to a height adjustment mechanism 3102. The pressing roller assembly 3120 presses the first material layer 5100 downward to fit the second material layer 5200 on the corresponding side. To improve the laminating effect, in this embodiment, the pressing roller assembly 3120 includes three pressing rollers 31211, including a preliminary laminating roller 3121A, a final laminating roller 3121B, and a transition laminating roller 3121C located between the preliminary laminating roller 3121A and the final laminating roller 3121B. The pressing roller components in the pressing roller assembly 3120 are configured such that the downward pressure F1 of the preliminary laminating roller 3121A is greater than the downward pressure F2 of the final laminating roller 3121B, and the downward pressure F1 of the preliminary laminating roller 3121A is greater than the downward pressure F3 of the transition laminating roller 3121C. In order to gradually slow down the pressing process, the pressing roller assembly in the pressing roller combination 3120 can also be specifically configured to be telescopic so that the downward pressure F1 of the initial pressing roller 3121A is greater than the downward pressure F3 of the transition pressing roller 3121C and the downward pressure F2 of the final pressing roller 3121B.
[0048] The surface hardness of the initial lamination roller, H1, is greater than the surface hardness of the final lamination roller, H2; the surface hardness of the initial lamination roller, H1, is greater than the surface hardness of the transition lamination roller, H3; furthermore, H3 ≥ H2. The stronger surface hardness of the initial lamination roller 3121A, combined with greater downward pressure, concentrates force on the pressed area, thereby eliminating air bubbles from entering the initial lamination area. The subsequent transition lamination roller 3121C and the final lamination roller 3121B, with their lower surface hardness and downward pressure, mitigate the lamination intensity and extend the lamination area, thereby assisting in lamination and facilitating subsequent release.
[0049] like Figures 8-11As shown, the unwinding system 1000 includes an unwinding device 1100, and the unwinding device 1100 includes an unwinding bracket 1110 and an unwinding shaft 1120. The unwinding bracket 1110 is also provided with a tension adjustment roller 1130, a tension detection roller 1140 and at least one guide roller 1150; the relative positions of the tension adjustment roller 1130, the tension detection roller 1140 and the guide roller 1150 are set so that the first material layer 5100 on the unwinding shaft 1120 passes through the tension adjustment roller 1130, the tension detection roller 1140 and the guide roller 1150, and the first surface side 201 of the first material layer 5100 only passes against the surface of at most one roller among all the rollers of the tension adjustment roller 1130, the tension detection roller 1140 or the guide roller 1150; the first surface side 201 is the surface side of the first material layer 5100 used for compounding with the downstream second material layer 5200. The tension detection roller 1140 detects the unwinding tension in real time and coordinates with the tension adjustment roller 1130 to adjust the unwinding tension. A viscous material, such as an adhesive layer, is present on the first surface side 201. In this embodiment, the first material layer 5100 is a composite film roll 2000, comprising a PET / PP / PI film layer and an adhesive layer disposed on the film surface. The first surface side 201 is the exposed adhesive surface of the film roll.
[0050] Specifically, in this embodiment, the tension adjustment roller 1130 and the tension detection roller 1140 are disposed adjacent to each other. The tension adjustment roller 1130 and the tension detection roller 1140 are disposed sequentially in the unwinding direction. The guide roller 1150 is disposed before and / or after the tension adjustment roller 1130 and the tension detection roller 1140. Alternatively, the guide roller 1150 may be disposed between the tension adjustment roller 1130 and the tension detection roller 1140. In the unwinding direction, the tension adjustment roller 1130 is disposed on the side closer to the unwinding shaft 1120, while the tension detection roller 1140 is disposed on the side farther from the unwinding shaft 1120. During the unwinding process of the first material layer 5100, the unwinding device 1100 minimizes contact with the side of the first material layer 5100 to be laminated. The tension detection roller 1140 monitors the tension in real time, and the tension adjustment roller 1130 adjusts the tension in real time.
[0051] like Figures 12-15As shown, in addition to the design of the simple unwinding direction, the unwinding device 1100 also has other adjustment methods. The unwinding system 1000 specifically includes a supporting bracket 1300, an unwinding device 1100, a first directional drive device, and a second directional drive device; the first directional drive device is mounted on the supporting bracket 1300, and the unwinding device 1100 is mounted on the first directional drive device via the second directional drive device; the first directional drive device drives the unwinding device 1100 to move in the first direction, and the second directional drive device drives the unwinding device 1100 to move in the second direction; the first direction is the unwinding direction of the unwinding device 1100, and the second direction is the direction perpendicular to the unwinding direction of the unwinding device 1100. The unwinding device 1100 is driven by the first directional drive device to deliver or receive, and the second directional drive device can provide a deviation correction function during the unwinding process, improving its transmission stability and accuracy.
[0052] In order to realize the driving in the first direction, the first direction driving device in this embodiment includes a first slide rail 1410, a first slider 1420, a rack 1430, a base 1440, and a first driving motor 1450; the first slide rail 1410 and the rack 1430 are fixed to the upper surface of the supporting bracket 1300, the unwinding device 1100 is installed on the base 1440, and the bottom of the base 1440 is provided with a first slider 1420 that cooperates with the first slide rail 1410; The first drive motor 1450 is connected to a transmission shaft 1460, which is equipped with a transmission gear 1470. The first drive motor 1450 drives the transmission gear 1470 to cooperate with the rack 1430 to drive the base 1440 to move in the first direction. Both sides of the base 1440 extend rearward to form mounting portions. The rear side of the wall panel 1112 is fixed to the mounting portions, and the first drive motor 1450, transmission shaft 1460, and transmission gear 1470 are all arranged between the mounting portions. To improve drive stability and synchronization, the first drive motor 1450 is a worm gear motor, installed in the middle of the transmission shaft 1460. Transmission gears 1470 are installed on both sides of the transmission shaft 1460. The second direction driving device includes a second slider 1510, a second slide rail 1520, and a second driving motor 1530; the unwinding device 1100 includes a base plate 1111, and the second slider 1510 is arranged on the lower surface of the base plate 1111; the second slide rail 1520 and the second driving motor 1530 are fixed to the upper surface of the first direction driving device; a hollow mounting opening is also provided on the base plate 1111, and the second driving motor 1530 is located in the mounting opening, and the output end of the second motor is against the wall of the mounting opening; the second driving motor 1530 is placed horizontally on the upper surface of the base 1440.
[0053] Because the first material layer 5100 used in this embodiment has a sticky surface and is in a wound state before use, it must be coated with a release film layer on its first surface side 201 and peeled off before lamination. Therefore, this system also includes a peeling component 1200, which is configured to peel off the release film layer before the film roll 2000 passes through the tension adjustment roller 1130 and the tension detection roller 1140. Specifically, when the guide roller 1150, the tension adjustment roller 1130, and the tension detection roller 1140 are arranged in sequence in the unwinding direction, the peeling component 1200 is positioned between the tension adjustment roller 1130 and the guide roller 1150, or between the unwinding shaft 1120 and the guide roller 1150.
[0054] In the unwinding and compounding process, the guide roller 1150 and / or the tension detection roller 1140 of the unwinding device 1100 and the pressure roller 31211 of the integrated pressure roller device 3100 in this embodiment are all connected to a tension sensor 1141; when the peeling component 1200 peels or the integrated pressure roller device 3100 presses down to compound, the unwinding system 1000 realizes tension adjustment in real time based on the feedback data of the tension sensor 1141 to maintain relatively stable tension.
[0055] In this embodiment, the cathode roller 4100 is the cathode roller in the foil machine 4000; the foil machine 4000 is installed underground. The foil machine 4000 includes an electrolytic cell and a cathode roller 4100. A drive motor is connected to the end of the cathode roller 4100, driving the cathode roller 4100 to rotate. A conductive copper ring is also provided on the drive shaft 1460 connecting the cathode roller 4100 to the drive motor. When the unwinding device 1100 extends forward in the first direction and protrudes beyond the support bracket 1300, the foil machine 4000 is located below the unwinding device 1100.
[0056] After passing through the pressure roller assembly 3120 and the deflection roller 3103, the composite layer 5300 is discharged; at this time, a bottom guide roller is provided on the lower side of the support frame 1300, and a plurality of transmission guide rollers are provided above the unwinding device 1100; the composite layer 5300 is transmitted downstream through the bottom guide roller and the plurality of transmission guide rollers. Figure 16 As shown, the downstream portion includes at least a passivation tank 6100, an extrusion roller 6200, a spray chamber 6300, a hot air device 6400, and a drying chamber 6500. The composite layer 5300 passes through the passivation tank 6100, the extrusion roller 6200, the spray chamber 6300, the hot air device 6400, and the drying chamber 6500 in sequence, and then reaches the winding device for winding. In this embodiment, the winding device is configured to wind so that the foil layer is located inside the wound material.
[0057] Example 2
[0058] This embodiment discloses a composite current collector produced using the composite current collector production system described in Example 1. The composite current collector can have a five-layer structure that undergoes two layers of lamination, namely, a film layer with an adhesive layer and a foil layer symmetrically disposed on either side, with the adhesive layer positioned between the foil layer and the film layer. The resulting composite current collector exhibits a tightly bonded structure, resisting separation, and a smooth composite interface, resulting in excellent composite current collector performance.
[0059] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. A composite current collector production system, characterized in that: include: an unwinding system for unwinding at least a first material layer; a cathode roller, at least used to generate a second material layer, wherein the second material layer is a metal foil layer; An integrated pressing roller device is located downstream of the unwinding system and includes a pressing roller assembly, wherein the pressing roller assembly is formed of two or more pressing roller assemblies, wherein the pressing roller assembly includes a pressing roller and a telescopic mechanism connected to the pressing roller, and the pressing roller assembly is used to at least transmit the first material layer; with the surface of the cathode roller as a support surface, the pressing roller assemblies are arranged circumferentially along the surface of the cathode roller, and the pressing roller assembly presses the first material layer and the second material layer downward to obtain a composite material; and a decoupling roller, the decoupling roller being used for pulling the composite material away from the surface of the cathode roller; The pressure roller near the upstream end of the pressure roller combination is the preliminary pressure roller, and the pressure roller near the downstream end of the pressure roller combination is the final pressure roller; the downward pressure F1 of the preliminary pressure roller is greater than the downward pressure F2 of the final pressure roller.
2. The composite current collector production system according to claim 1, characterized in that: The surface hardness H1 of the preliminary pressing roller is greater than the surface hardness H2 of the finishing pressing roller.
3. The composite current collector production system according to claim 2, characterized in that: The pressing roller combination includes more than three pressing rollers, namely the preliminary pressing roller, the final pressing roller and one or more transition pressing rollers located between the preliminary pressing roller and the final pressing roller; the downward pressure F1 of the preliminary pressing roller is greater than the downward pressure F3 of the transition pressing roller.
4. The composite current collector production system according to claim 3, characterized in that: F1, F2, and F3 are independently 0.1N / in to 10N / in.
5. The composite current collector production system according to claim 1, characterized in that: The unwinding system includes an unwinding device, which includes an unwinding bracket and an unwinding shaft. The unwinding bracket is also provided with a tension adjustment roller, a tension detection roller and at least one guide roller; the relative positions of the tension adjustment roller, the tension detection roller and the guide roller are set so that the first material layer on the unwinding shaft passes through the tension adjustment roller, the tension detection roller and the guide roller, and the first surface side of the first material layer only abuts against the surface of at most one roller among all the rollers of the tension adjustment roller, the tension detection roller or the guide roller; the first surface side is the surface side of the first material layer used for compounding with the second material layer downstream.
6. The composite current collector production system according to claim 3, characterized in that: The unwinding system includes a supporting bracket, an unwinding device, a first directional driving device and a second directional driving device; the first directional driving device is installed on the supporting bracket, and the unwinding device is installed on the first directional driving device through the second directional driving device; The first direction driving device drives the unwinding device to move in the first direction, and the second direction driving device drives the unwinding device to move in the second direction; the first direction is the unwinding direction of the unwinding device, and the second direction is a direction perpendicular to the unwinding direction of the unwinding device.
7. The composite current collector production system according to claim 6, characterized in that: The first direction driving device includes a first slide rail, a first slider, a rack, a base, and a first driving motor; the first slide rail and the rack are fixed to the upper surface of the supporting bracket, the unwinding device is installed on the base, and the bottom of the base is provided with a first slide rail that cooperates with the first slide rail; the first driving motor is connected to the transmission shaft, and a transmission gear is provided on the transmission shaft, and the first driving motor drives the transmission gear to cooperate with the rack to drive the base to move in the first direction; the second direction driving device includes a second slider, a second slide rail, and a second driving motor; the unwinding device includes a base plate, and the second slider is arranged on the lower surface of the base plate; the second slide rail and the second driving motor are fixed to the upper surface of the first direction driving device; a hollow mounting opening is also provided on the base plate, the second driving motor is located in the mounting opening, and the output end of the second driving motor is against the wall of the mounting opening.
8. The composite current collector production system according to claim 7, characterized in that: The first driving motor is connected to a transmission shaft, and a transmission gear is provided on the transmission shaft. The first driving motor drives the transmission gear to cooperate with the rack to drive the base to move in the first direction.
9. The composite current collector production system according to claim 7, characterized in that: Both sides of the base extend backward to form mounting parts; the first drive motor, the transmission shaft, and the transmission gear are all arranged between the mounting parts.
10. The composite current collector production system according to claim 3, characterized in that: The first surface side of the first material layer is covered with a release film layer; the unwinding system further comprises a peeling component, and the peeling component is configured to peel off the release film layer before the tension adjustment roller.
11. The composite current collector production system according to claim 10, characterized in that: The tension detection roller of the unwinding device and the pressure roller of the integrated pressure roller device are both connected to tension sensors; when the peeling component peels or the integrated pressure roller device presses down to compound, the unwinding system adjusts the tension in real time based on the feedback data from the tension sensor.
12. The composite current collector production system according to any one of claims 1 to 8, characterized in that: The cathode roller is a cathode roller in a foil machine; the foil machine is installed underground.
13. The composite current collector production system according to claim 12, characterized in that: When the unwinding device extends toward the front side in the first direction and protrudes from the supporting bracket, the foil production machine is located below the unwinding device.
14. The composite current collector production system according to claim 13, characterized in that: The foil machine comprises an electrolytic cell and a cathode roller, wherein the end of the cathode roller is connected to a drive motor, and the cathode roller is driven to rotate by the drive motor connected to the end; A conductive copper ring is also provided on the transmission shaft connecting the cathode roller and the drive motor.
15. The composite current collector production system according to any one of claims 1 to 8, characterized in that: The downstream of the integrated pressing roller device also includes a passivation tank, an extrusion roller, a spray chamber, a hot air device and / or a drying chamber.