Tension traction device for lithium battery coating

Abstract

The utility model discloses a tension traction device for coating a lithium battery, which comprises a guide-in adjustable roller, a tension traction roller, a tension traction roller, a tension traction roller and a tension traction roller, wherein the guide-in adjustable roller is used for guiding a battery foil into the tension traction device; the floating roller assembly is used for tensioning the battery foil and comprises an inlet floating roller assembly and an outlet floating roller assembly; the S roller assembly is used for limiting and guiding the battery foil, and the inlet floating roller assembly and the outlet floating roller assembly are located on the two sides of the S roller assembly respectively; the inlet floating roller assembly is located on one side of the guiding-in adjustable roller and used for bearing the battery foil guided out by the guiding-in adjustable roller. When the device is used, cloth is guided in from the unwinding roller and is guided into the front end face of the base plate through the guide-in roller to be pulled, then the cloth is tensioned through the arranged inlet floating roller assembly, and the position of the inlet floating roller in the center can be adjusted, so that the tensioning degree of battery foil can be adjusted; therefore, the surface of the battery foil is always kept at proper tension degree, and the subsequent coating process is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production, specifically to a tension traction device for lithium battery coating. Background Technology

[0002] Lithium-ion batteries have advantages such as high energy density, wide operating temperature range, and stable discharge, and have gradually become the mainstream power battery. During the manufacturing process of lithium-ion battery electrodes, negative or positive electrode slurry needs to be coated to ensure that the electrode material is evenly applied to the substrate.

[0003] Existing battery foil carbon coating processes typically require cutting the battery foil into small rolls before hauling them into the carbon coating production line via a robotic arm on the inlet traction machine. Because existing battery foil carbon coating production lines require cutting the foil into small rolls before hauling, the process is not only cumbersome and time-consuming, but also requires manual unwinding of the small rolls. Furthermore, traditional lithium battery foil uses a single unwinding mode, requiring equipment shutdown and manual rewinding to remove the mandrel sleeve and replace it with a full-length roll. Even though the inventors of this application have developed a dual-station unwinding and winding device that achieves automatic roll changing without stopping the machine, it still increases energy consumption and causes production interruptions.

[0004] To address the aforementioned problems, the inventors of this application, after years of research, have developed a large-diameter battery foil carbon coating production line. This solves the problem of cutting and slitting the battery foil before it is introduced into traditional carbon coating production lines. By directly introducing the large-diameter battery foil and performing carbon coating, continuous production is achieved, simplifying the process, reducing manual operation costs, and achieving a high degree of automation. However, during the unwinding process of large-diameter battery foil, due to its large diameter, uneven end faces of the roll are prone to occur, easily causing errors and affecting the subsequent carbon coating effect. Therefore, it is necessary to design a tension traction device for lithium battery coating. By applying tension traction to the large-diameter battery foil and adjusting the surface tension of the battery foil during unwinding, the end faces of the roll are made neat, ensuring a good unwinding effect. Utility Model Content

[0005] The purpose of this utility model is to provide a tension traction device for lithium battery coating, so as to solve the problem that large-diameter battery foil is prone to uneven end face during unwinding, which can easily lead to uneven coating. Through the design of the tension traction device, the large-diameter battery foil is tensioned, the surface tension of the battery foil is adjusted during unwinding, the end face of the foil is made neat, and good unwinding effect is guaranteed.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a tension traction device for coating lithium batteries, comprising:

[0008] An adjustable roller is used to guide the battery foil into the tension traction device;

[0009] The floating roller assembly, which enables tensioning of the battery foil, includes an inlet floating roller assembly and an outlet floating roller assembly;

[0010] The S-roller assembly is used to filter tension fluctuations on the surface of the battery foil, and the inlet floating roller assembly and the outlet floating roller assembly are located on both sides of the S-roller assembly, respectively.

[0011] The inlet floating roller assembly is located on the side of the inlet adjustable roller. It is used to receive the battery foil exported by the inlet adjustable roller, and after tensioning the surface of the battery foil, it is exported to the S roller assembly. The S roller assembly then exports the battery foil to the outlet floating roller assembly, and the outlet floating roller assembly is used to tension the surface of the battery foil before exporting it to the tension traction device.

[0012] Preferably, the imported floating roller assembly includes three sets of imported floating rollers, with the battery foil wound around the outer surface of the three sets of imported floating rollers along the travel direction and distributed in an S-shape.

[0013] Preferably, the imported floating roller assembly further includes an adjustment mechanism for adjusting the tension of the battery foil surface;

[0014] Furthermore, the adjustment mechanism is used to adjust the position of the inlet floating roller located at the center position. It includes an adjustment plate connected to the inlet floating roller at the center position. The adjustment plate swings horizontally under the drive of the floating cylinder, thereby adjusting the position of the inlet floating roller at the center position.

[0015] Preferably, the adjustment mechanism further includes a rotating shaft, which is rotatably connected to the adjustment plate, and the rotating shaft is used to install and position one end of the adjustment plate.

[0016] Preferably, the adjusting plate is arranged along the first direction, and the rotating shaft and the inlet floating roller located at the center are respectively arranged at both ends of the adjusting plate.

[0017] Preferably, the S-roll assembly includes three sets of filter rollers. The battery foil is discharged from the inlet floating roller assembly and enters the S-roll assembly, and is wound around the outer surface of the three sets of filter rollers in the direction of travel, and is distributed in an S-shape.

[0018] Preferably, the three sets of inlet floating rollers are arranged in a V-shape along the first direction, and the three sets of filter rollers are arranged in a V-shape along the second direction, with the first direction and the second direction being perpendicular to each other on the same plane.

[0019] Preferably, the outlet floating roller assembly includes three sets of outlet floating rollers. After the battery foil is discharged through the S-roller assembly, it enters the outlet floating roller assembly and is wound around the outer surface of the three sets of outlet floating rollers in the direction of travel, and is distributed in an S-shape.

[0020] Preferably, the three sets of outlet floating rollers are arranged in a V-shape along the first direction;

[0021] Furthermore, the diameters of the two sets of outlet floating rollers located at the inlet and outlet positions are consistent and smaller than the diameter of the outlet floating roller located at the center position.

[0022] Preferably, the system also includes a substrate, wherein the adjustable inlet roller, the floating roller assembly, and the S-roller assembly are all mounted on the same side of the substrate.

[0023] An adjustable inlet roller is installed at the top end of the front face of the substrate, an inlet floating roller assembly is installed at the center side of the front face of the substrate, an S-roller assembly is installed at the bottom side of the front face of the substrate, a fine-tuning roller is installed at the bottom side of one side of the front face of the substrate, an outlet floating roller assembly is installed at the top side of one side of the front face of the substrate, and an outlet roller is installed at the top side of one side of the substrate.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] In use, the fabric is introduced from the unwinding roller, then guided to the front end of the substrate by the inlet roller for traction. The fabric is then tensioned by the inlet floating roller assembly, and the position of the central inlet floating roller can be adjusted to adjust the tension of the battery foil, so that the surface of the battery foil always maintains a suitable tension, which is convenient for subsequent coating processes.

[0026] This invention utilizes a floating cylinder that allows for telescopic movement, enabling the adjustment plate to rotate around a rotating shaft. This, in turn, adjusts the distance between the central inlet floating roller and the inlet floating rollers on the same vertical plane at both ends, thereby adjusting the tension of the fabric sequentially wound around the inlet floating roller.

[0027] This invention uses three sets of S-shaped filter rollers to make the fabric wrap around the outer wall of the filter rollers in an S-shape, thus keeping the fabric in a taut state. The surface of the battery foil before it is discharged is further tensioned by the set outlet floating roller. Attached Figure Description

[0028] Figure 1 This is a front view of the tension traction device for lithium battery coating in an embodiment of this utility model;

[0029] Figure 2 This is a schematic diagram of the adjustment mechanism in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the S-roller assembly in an embodiment of the present invention;

[0031] Figure 4 This is a cross-sectional view of the adjustable roller in an embodiment of the present invention.

[0032] Figure 5 for Figure 4 Sectional view of section BB;

[0033] Figure 6 for Figure 4 A sectional view of section AA in the middle.

[0034] In the picture:

[0035] 3. Substrate; 4. Adjustable inlet roller; 5. Inlet floating roller assembly; 501. Inlet floating roller; 6. S-roller assembly; 601. Filter roller; 7. Fine-tuning roller; 8. Outlet floating roller assembly; 801. Outlet floating roller; 9. Outlet roller; 10. Rotating shaft; 11. Adjusting plate; 12. Floating cylinder;

[0036] 401. Horizontal connecting screw; 402. Horizontal slide rail; 403. Horizontal adjusting seat; 404. Horizontal locking nut; 405. Horizontal adjusting screw; 406. Height connecting screw; 407. Height locking nut; 408. Height adjusting slide rail; 409. Height adjusting screw; 410. Height adjusting seat. Detailed Implementation

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or connected in an integral manner; they can be mechanically connected or electrically connected; they can be directly connected, indirectly connected through an intermediate medium, or they can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The following describes the embodiments of the present invention based on its overall structure. Example

[0039] Please see Figure 1-3 This embodiment provides a tension traction device for lithium battery coating. This tension traction device is located on the discharge side of the unwinding device in a lithium battery coating production line and is used to pull the battery foil unwound by the unwinding device. Since this application uses large-diameter battery foil rolls, without a tension traction device to control the tension of the battery foil surface, insufficient tension can lead to unevenness and wrinkles on the end face of the battery foil roll, while excessive tension can cause tearing and cracks on the surface of the battery foil roll.

[0040] The specific tension traction device includes an adjustable guide roller 4, a floating roller assembly, and an S-roller assembly 6. The adjustable guide roller 4 is located on the feed side of the tension traction device and is used to guide the unwound battery foil into the tension traction device. The floating roller assembly adjusts the tension of the battery foil surface, thereby adjusting the tension of the battery foil surface. In addition, the S-roller assembly 6 is used to limit and guide the battery foil in this embodiment.

[0041] The adjustable inlet roller 4 is used to inlet the battery foil, and the floating roller assembly is used to control the tension of the battery foil surface to adjust the surface tension of the battery foil. The floating roller assembly is located on the discharge side of the adjustable inlet roller 4 and is used to pull the battery foil out of the adjustable inlet roller 4. The adjustable inlet roller 4 is used to adjust the incoming plate shape and the tension of the strip (battery foil).

[0042] In some feasible methods, the position of the adjustable guide roller 4 can be adjusted for height or left / right position. This is mainly achieved by adjusting the position of the mounting base of the adjustable guide roller 4 on the horizontal or vertical slide rail. This can be done manually and secured with bolts. Once the position of the adjustable guide roller 4 is adjusted, it will not be adjusted again during continuous operation. Adjustment will only be considered when replacing a different battery foil. There are various ways to adjust the left / right and up / down positions of the adjustable guide roller 4 in the prior art, which should be clear to those skilled in the art; therefore, they will not be elaborated upon here.

[0043] The position of the adjustable roller 4 is adjusted via a horizontal adjustment mechanism and a height adjustment mechanism. For details, please refer to [reference needed]. Figures 4-6 As shown, in this embodiment, the axial ends of the adjustable roller 4 are respectively rotatably connected to a horizontal connecting screw 401 and a height connecting screw 406. The horizontal position of the adjustable roller 4 is adjusted by adjusting the horizontal connecting screw 401 in the horizontal position, and the vertical height position of the adjustable roller 4 is adjusted by adjusting the height connecting screw 406 in the vertical position. Specifically, in this embodiment, the end of the horizontal connecting screw 401 away from the adjustable roller 4 is locked to the horizontal adjusting seat 403 by a horizontal locking nut 404, and the side of the horizontal adjusting seat 403 opposite to the adjustable roller 4 is provided with a horizontal slider that cooperates with the horizontal slide rail 402. Figure 5 As can be seen, there is a pair of horizontal slide rails 402, symmetrically distributed on both sides of the horizontal adjusting seat 403. A horizontal adjusting screw 405 is provided between the two horizontal slide rails 402 to drive the horizontal adjusting seat 403 to move horizontally. The horizontal adjusting screw 405 is connected to the horizontal adjusting seat 403. In actual use, the horizontal adjusting screw 405 can be manually rotated to adjust the horizontal position of the horizontal adjusting seat 403, thereby adjusting the horizontal position of the guide adjustable roller 4.

[0044] Similarly, the end of the height connecting screw 406 away from the adjustable guide roller 4 is locked to the height adjusting seat 410 by a height locking nut 407, and the side of the height adjusting seat 410 away from the adjustable guide roller 4 is provided with a horizontal slider that cooperates with the height slide rail 408. Figure 6As can be seen, the height slide rails 408 are a pair, symmetrically distributed on both sides of the height adjusting seat 410, and a height adjusting screw 409 is provided between the two height slide rails 408 to drive the height adjusting seat 410 to move vertically. The height adjusting screw 409 is connected to the height adjusting seat 410. In actual use, the height adjusting screw 409 can be manually rotated to adjust the horizontal position of the height adjusting seat 410, thereby driving the adjustment of the vertical height position of the guide adjustable roller 4. It can be understood that the horizontal adjustment mechanism and the vertical height adjustment mechanism of the guide adjustable roller 4 do not interfere with each other.

[0045] In this embodiment, the floating roller assembly includes an inlet floating roller assembly 5 and an outlet floating roller assembly 8, which are located on opposite sides of the S-roller assembly 6. The inlet floating roller assembly 5 is located on the side of the adjustable inlet roller 4. It receives the battery foil discharged from the adjustable inlet roller 4, tensions the surface of the battery foil, and discharges it to the S-roller assembly 6. The S-roller assembly then discharges the battery foil to the outlet floating roller assembly 8, where the outlet floating roller assembly 8 tensions the surface of the battery foil and discharges it to the tension traction device.

[0046] Furthermore, if Figure 1 As shown, in this embodiment, the imported floating roller assembly 5 includes three sets of imported floating rollers 501. The battery foil is wound around the outer surface of the three sets of imported floating rollers 501 along the traveling direction and is distributed in an S-shape. The fabric is tensioned by the imported floating roller assembly 5, and the position of the central imported floating roller 501 can be adjusted to adjust the tension of the fabric, so that fabrics of different sizes are always in a taut state, which is convenient for subsequent coating processes.

[0047] In this embodiment, the outlet floating roller assembly 8 includes three sets of outlet floating rollers 801. After the battery foil is discharged through the S roller assembly 6, it enters the outlet floating roller assembly 8 and is wrapped and attached to the outer surface of the three sets of outlet floating rollers 801 along the travel direction, and is distributed in an S-shape. The battery foil is tensioned again by the outlet floating rollers 801.

[0048] Furthermore, the diameter of the two sets of outlet floating rollers 801 located at the inlet and outlet positions is consistent and smaller than the diameter of the outlet floating roller 801 located at the center position.

[0049] Figure 3The diagram shows the structure of the S-roller assembly 6, which includes three sets of filter rollers 601. The battery foil, after being guided by the inlet floating roller assembly 5, enters the S-roller assembly 6 and is wound around the outer surface of the three sets of filter rollers 601 in an S-shape along the direction of travel. The V-shaped arrangement of the three sets of filter rollers 601 causes the fabric to wrap around the outer wall of the filter rollers 601 in an S-shape, thus keeping the fabric taut. This S-roller assembly 6 not only limits and pulls the battery foil but also tensions the surface of the battery foil, effectively filtering tension fluctuations on the battery foil surface and achieving tension stability.

[0050] In some feasible embodiments, three sets of inlet floating rollers 501 are arranged in a V-shape along a first direction, three sets of filter rollers 601 are arranged in a V-shape along a second direction, and three sets of outlet floating rollers 801 are arranged in a V-shape along the first direction, with the first and second directions perpendicularly distributed on the same plane. In this embodiment, the first direction is as follows: Figure 1 The vertical direction shown in the figure, the second direction is as follows Figure 1 The horizontal direction shown.

[0051] In some feasible embodiments, the inlet floating roller assembly 5 further includes an adjustment mechanism for adjusting the tension of the battery foil surface, specifically, as follows: Figure 2 As shown, the adjustment mechanism is used to adjust the position of the inlet floating roller 501 located at the center position. It includes an adjustment plate 11 connected to the inlet floating roller 501 at the center position. The adjustment plate 11 swings horizontally under the drive of the floating cylinder 12, thereby adjusting the position of the inlet floating roller 501 at the center position.

[0052] Furthermore, the adjustment mechanism also includes a rotating shaft 10, which is rotatably connected to the adjustment plate 11. The rotating shaft 10 is used to position one end of the adjustment plate 11. The inlet floating roller 501 is connected to the adjustment plate, but does not affect the rotation of the inlet floating roller 501. Specifically, in some feasible embodiments, the adjustment plate 11 can be connected to the bearing seat of the inlet floating roller 501. Under the extension and retraction movement of the floating cylinder 12, the adjustment plate 11 drives the bearing seat and the inlet floating roller 501 to swing left and right. After adjusting the position of the inlet floating roller 501 at the center position, it does not affect the rotation of the inlet floating roller 501 itself. The positions of the rotating shaft 10 and the adjustment plate 11 do not interfere with the inlet floating roller 501, nor do they affect the discharge of the battery foil.

[0053] Specifically, in some feasible embodiments, the extension and retraction of the floating cylinder 12 drives the adjusting plate 11 to rotate around the rotating shaft 10, thereby adjusting the left and right swing of the inlet floating roller 501 at the center position, and thus adjusting the surface tension of the battery foil wound on the inlet floating roller 501.

[0054] This embodiment also includes a substrate 3, wherein the adjustable roller 4, the floating roller assembly and the S roller assembly 6 are all mounted on the same side of the substrate 3, which is used to provide an installation platform, and when the tension traction device is used, the bottom of the substrate 3 can be fixedly installed on the ground or the installation platform.

[0055] A fine-tuning roller 7 is installed at the bottom of one side of the front end face of the substrate 3, an outlet floating roller assembly 8 is installed at the top of one side of the front end face of the substrate 3, and an outlet roller 9 is installed at the top of one side of the substrate 3.

[0056] The working principle of the tension traction device in this embodiment is as follows:

[0057] In use, the adjustable inlet roller 4 is used to guide the battery foil roll unwound from the unwinding mechanism on the lithium battery coating production line to the inlet floating roller assembly 5. The inlet floating roller assembly 5 is used to initially tension the surface of the battery foil and pull it out. During use, the position of the inlet floating roller 501 at the center of the inlet floating roller assembly 5 can be adjusted according to the actual situation using the adjustment mechanism. Then the battery foil is guided to the S roller assembly 6. After the tension fluctuation of the battery foil surface is filtered by the S roller assembly 6, it is exported to the outlet floating roller assembly 8. After being tensioned again by the outlet floating roller assembly 8, it is exported to the next process for subsequent processing via the export roller 9.

[0058] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A tension traction device for coating lithium batteries, characterized in that, include: An adjustable roller (4) is used to guide the battery foil into the tension traction device; The floating roller assembly, which enables the tensioning of the battery foil, includes an inlet floating roller assembly (5) and an outlet floating roller assembly (8). The S-roller assembly (6) is used to filter tension fluctuations on the surface of the battery foil, and the inlet floating roller assembly (5) and the outlet floating roller assembly (8) are located on both sides of the S-roller assembly (6); The inlet floating roller assembly (5) is located on one side of the inlet adjustable roller (4). It is used to receive the battery foil exported by the inlet adjustable roller (4), and after tensioning the surface of the battery foil, it is exported to the S roller assembly (6). The battery foil is exported to the outlet floating roller assembly (8) through the S roller assembly, and the outlet floating roller assembly (8) is used to tension the surface of the battery foil and export it to the tension traction device.

2. The tension traction device for lithium battery coating according to claim 1, characterized in that, The imported floating roller assembly (5) includes three sets of imported floating rollers (501). The battery foil is wound around the outer surface of the three sets of imported floating rollers (501) along the travel direction and is distributed in an S-shape.

3. The tension traction device for lithium battery coating according to claim 2, characterized in that, The imported floating roller assembly (5) also includes an adjustment mechanism for adjusting the tension of the battery foil surface; And / or, the adjustment mechanism is used to adjust the position of the inlet floating roller (501) located at the center position, which includes an adjustment plate (11) connected to the inlet floating roller (501) at the center position. The adjustment plate (11) swings horizontally under the drive of the floating cylinder (12), thereby adjusting the position of the inlet floating roller (501) at the center position.

4. The tension traction device for lithium battery coating according to claim 3, characterized in that, The adjustment mechanism also includes a rotating shaft (10), which is rotatably connected to the adjustment plate (11). The rotating shaft (10) is used to install and position one end of the adjustment plate (11).

5. The tension traction device for lithium battery coating according to claim 4, characterized in that, The adjusting plate (11) is arranged along the first direction, and the rotating shaft (10) and the inlet floating roller (501) located at the center are respectively arranged at both ends of the adjusting plate (11).

6. The tension traction device for lithium battery coating according to claim 1, characterized in that, The S-roller assembly (6) includes three sets of filter rollers (601). The battery foil is discharged through the inlet floating roller assembly (5) and enters the S-roller assembly (6), and is wound around the outer surface of the three sets of filter rollers (601) in the direction of travel, and is distributed in an S-shape.

7. The tension traction device for lithium battery coating according to claim 6, characterized in that, The three sets of inlet floating rollers (501) are arranged in a V-shape along the first direction, and the three sets of filter rollers (601) are arranged in a V-shape along the second direction, with the first direction and the second direction being perpendicular to each other on the same plane.

8. The tension traction device for lithium battery coating according to claim 1, characterized in that, The outlet floating roller assembly (8) includes three sets of outlet floating rollers (801). After the battery foil is discharged through the S roller assembly (6), it enters the outlet floating roller assembly (8) and is wound around the outer surface of the three sets of outlet floating rollers (801) in the direction of travel, and is distributed in an S-shape.

9. The tension traction device for lithium battery coating according to claim 8, characterized in that, The three sets of outlet floating rollers (801) are arranged in a V-shape along the first direction; And / or, the diameter of the two sets of outlet floating rollers (801) located at the inlet and outlet positions is consistent and smaller than the diameter of the outlet floating roller (801) located at the center position.

10. The tension traction device for lithium battery coating according to claim 1, characterized in that, It also includes a substrate (3), wherein the adjustable roller (4), the floating roller assembly and the S roller assembly (6) are all mounted on the same side of the substrate (3); An adjustable inlet roller (4) is installed at the top end of the front end face of the substrate (3), an inlet floating roller assembly (5) is installed at the center side of the front end face of the substrate (3), an S roller assembly (6) is installed at the bottom side of the front end face of the substrate (3), a fine-tuning roller (7) is installed at the bottom side of one side of the front end face of the substrate (3), an outlet floating roller assembly (8) is installed at the top side of one side of the front end face of the substrate (3), and an outlet roller (9) is installed at the top side of one side of the substrate (3).

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