Bump post-processing device for preparing composite current collector
By using structures such as the unwinding assembly, rolling assembly, and vision inspection mechanism on the frame, the quality problem caused by protrusions in the preparation of composite current collectors was solved, achieving higher molding quality and battery performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-03-31
AI Technical Summary
During the preparation of composite current collectors, the presence of bumps affects the appearance quality and flatness of the composite current collectors, leading to increased battery internal resistance, reduced energy density, and poorer cycle stability.
The structure employs unwinding components, rolling components, vision inspection mechanisms, and limiting plates on the frame. Through rolling and inspection, protrusions on the surface of the composite current collector are removed to ensure its flatness.
This improved the molding quality of the composite current collector, reduced the battery's internal resistance, and enhanced energy density and cycle stability.
Smart Images
Figure CN224058407U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of composite current collectors, specifically to a post-processing device for the preparation of composite current collectors with protrusions. Background Technology
[0002] As a core component of lithium-ion batteries, composite current collectors often suffer from surface bumps during their fabrication due to the complexity of material composite processes, the inhomogeneity of raw materials, and limitations of processing equipment. These bumps not only affect the appearance quality of the composite current collector but also disrupt its surface smoothness, hindering effective contact between the battery's internal electrode materials and the current collector. This leads to increased internal resistance, reduced energy density, and poorer cycle stability. Therefore, this application proposes a bump post-processing device for composite current collector fabrication to address these technical problems. Utility Model Content
[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a bump post-processing device for the preparation of composite current collectors.
[0004] To achieve the above objectives, the technical solution adopted by this utility model includes: a frame, wherein an unwinding assembly and a winding assembly are respectively provided at both ends of the frame along a first direction, the unwinding assembly being used to release the composite current collector, and the winding assembly being used to wind the composite current collector released by the unwinding assembly; a roller pressing assembly, having at least a first pressure roller and a second pressure roller arranged in a vertical direction, and a first adjusting device for adjusting the distance between the first pressure roller and the second pressure roller; and a visual inspection mechanism, arranged on the side of the roller pressing assembly along the first direction, for detecting whether the protrusions on the surface of the composite current collector after the roller pressing assembly has completed the roller pressing meet the standard.
[0005] In the preferred embodiment of the above-mentioned post-processing device for preparing composite current collectors, a first limiting plate and a second limiting plate are disposed on the side of the roller pressing assembly near the unwinding assembly. A limiting space is formed between the first limiting plate and the second limiting plate. The composite current collector released by the unwinding assembly passes through the limiting space. The ends of the first limiting plate and the second limiting plate extend to the first pressure roller and the second pressure roller.
[0006] In the preferred embodiment of the above-mentioned post-processing device for preparing composite current collectors, multiple sets of rollers are provided on the inner sides of both the first limiting plate and the second limiting plate. The rollers of the first limiting plate and the rollers of the second limiting plate are symmetrically arranged. The composite current collector is guided to move towards the rolling assembly by the multiple sets of symmetrically arranged rollers.
[0007] In the preferred embodiment of the above-mentioned post-processing device for preparing composite current collectors, heating components are provided inside the first limiting plate and the second limiting plate.
[0008] In the preferred embodiment of the above-mentioned post-processing device for preparing composite current collectors, the first limiting plate has a first wing at the end facing the unwinding assembly, and the second limiting plate has a second wing at the end facing the unwinding assembly.
[0009] In the preferred embodiment of the above-mentioned post-processing device for preparing composite current collectors, the first limiting plate and the second limiting plate are mounted on the second adjusting device, and the second adjusting device can adjust the gap between the first limiting plate and the second limiting plate to change the size of the limiting space.
[0010] In the preferred embodiment of the above-mentioned post-processing device for preparing composite current collectors, both the first limiting plate and the second limiting plate have rounded corners at the end facing the roller pressing assembly.
[0011] In the preferred embodiment of the above-mentioned post-processing device for preparing composite current collectors, the first adjusting device includes at least a bidirectional screw that is vertically rotatably mounted on the frame and a first driving device for driving the bidirectional screw to rotate, wherein the first pressure roller is mounted on the forward thread of the bidirectional screw by means of a first slider, and the second pressure roller is mounted on the reverse thread of the bidirectional screw by means of a second slider.
[0012] In the preferred embodiment of the above-mentioned post-processing device for preparing composite current collectors, the second adjustment device includes at least a bracket, on which a first waist-shaped hole and a second waist-shaped hole are provided in the vertical direction. The first limiting plate is installed in the first waist-shaped hole of the bracket by means of a first bolt, and the second limiting plate is installed in the second waist-shaped hole of the bracket by means of a second bolt.
[0013] In the preferred embodiment of the above-mentioned bump post-processing device for preparing composite current collectors, the unwinding assembly includes at least an unwinding roller rotatably mounted on the frame and a second driving device for driving the unwinding roller to rotate.
[0014] In the preferred embodiment of the above-mentioned post-processing device for preparing composite current collectors, the winding assembly includes at least a winding roller rotatably mounted on the frame and a third driving device for driving the winding roller to rotate.
[0015] The beneficial effect of this utility model is that the composite current collector is released by the unwinding assembly and pulled by the winding assembly, so that the composite current collector continuously passes through the rolling assembly and the vision inspection mechanism. The rolling assembly rolls and shapes the protrusions of the composite current collector, and the vision inspection mechanism inspects and records the composite current collector after rolling and shaping, so as to further improve the forming quality of the composite current collector and make it practical. Attached Figure Description
[0016] Figure 1 This is the front view of the present invention;
[0017] Figure 2 This is a schematic diagram of the first limiting plate, the second limiting plate, and the second adjusting device;
[0018] In the figure: frame 1, unwinding assembly 2, unwinding roller 21, winding assembly 3, winding roller 31, roller pressing assembly 4, first pressure roller 41, second pressure roller 42, first adjusting device 43, first limiting plate 5, first wing plate 51, second limiting plate 6, second wing plate 61, limiting space 7, second adjusting device 8, bracket 81, first waist-shaped hole 811, second waist-shaped hole 812, visual inspection mechanism 9, roller 10, heating resistance wire 11, protrusion detection mechanism 12. Detailed Implementation
[0019] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.
[0020] It should be noted that in the description of this utility model, terms such as "upper," "lower," "left," "right," "front," and "rear," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0022] like Figures 1 to 2As shown, the post-processing device for the preparation of composite current collectors according to this utility model includes: a frame 1, with an unwinding assembly 2 and a winding assembly 3 respectively provided at both ends of the frame 1 along a first direction. The unwinding assembly 2 is used to release the composite current collector, and the winding assembly 3 is used to wind the composite current collector released by the unwinding assembly 2; a roller pressing assembly 4, which has at least a first pressure roller 41 and a second pressure roller 42 arranged in a vertical direction, and a first adjusting device 43 for adjusting the distance between the first pressure roller 41 and the second pressure roller 42; and a visual inspection mechanism 9, which is arranged on the side of the roller pressing assembly 4 along the first direction, for detecting whether the protrusions on the surface of the composite current collector after the roller pressing assembly 4 has completed the roller pressing process meet the standard.
[0023] See Figure 1 The first direction is the length direction of the frame 1. The two ends of the frame 1 are equipped with an unwinding assembly 2 and a winding assembly 3. The frame 1 is equipped with a roller pressing assembly 4 and a vision inspection mechanism 9 between the unwinding assembly 2 and the winding assembly 3. The composite current collector released by the unwinding assembly 2 passes through the roller pressing assembly 4 and the vision inspection mechanism 9 in sequence and is then wound up by the winding assembly 3. The roller pressing assembly 4 can roll the protrusions on the composite current collector to improve the forming quality of the composite current collector. The vision inspection mechanism 9 can take pictures of the surface of the composite current collector after rolling to confirm whether the protrusions have been rolled flat.
[0024] Specifically, when shaping the composite current collector, the unwinding assembly 2 releases the composite current collector, and the winding assembly 3 pulls the composite current collector, causing it to continuously pass through the rolling assembly 4 and the vision inspection mechanism 9. The vision inspection mechanism 9 includes at least a CCD camera mounted on the frame 1 and a light source that illuminates the surface of the composite current collector. The CCD camera and the light source are located on the side of the rolling assembly 4. When the light source illuminates the surface of the composite current collector, if it illuminates a protrusion, the CCD camera will take a picture, forming a bright and dark area, thereby determining and recording the position of the protrusion. The rolling assembly 4 can roll and shape the protrusions of the composite current collector. The CCD camera inspects and records the rolled and shaped composite current collector to confirm whether the protrusions have been rolled flat. This setup can further improve the forming quality of the composite current collector and is practical.
[0025] In another embodiment, a bump detection mechanism 12 is also included. The bump detection mechanism 12 is located on the side of the roller pressing assembly 4 away from the vision inspection mechanism 9 along the first direction. It is used to detect the position and height of the bumps on the surface of the composite current collector before roller pressing and to feed back the signal to the first adjustment device 43 to adjust the distance between the first pressure roller 41 and the second pressure roller 42. The roller pressing distance can be adjusted according to the size of the bumps on the surface of the composite current collector to achieve a better roller pressing effect, ensure that the bumps are pressed flat, and guarantee the molding quality. The bump detection mechanism 12 and the vision inspection mechanism 9 are configured in the same way. The position and height of the bumps are detected and recorded by using a CCD camera and a light source.
[0026] In one or more embodiments, it further includes a first limiting plate 5 and a second limiting plate 6 disposed on the side of the roll forming assembly 4 near the unwinding assembly 2, a limiting space 7 is formed between the first limiting plate 5 and the second limiting plate 6, the composite current collector released by the unwinding assembly 2 passes through the limiting space 7, and the ends of the first limiting plate 5 and the second limiting plate 6 extend to the first pressure roller 41 and the second pressure roller 42; the first limiting plate 5 has a first wing 51 at the end facing the unwinding assembly 2, and the second limiting plate 6 has a second wing 61 at the end facing the unwinding assembly 2.
[0027] See Figure 1 , Figure 2The limiting space 7 formed between the first limiting plate 5 and the second limiting plate 6 is used for the passage of the composite current collector. The first limiting plate 5 and the second limiting plate 6 extend from the end away from the unwinding assembly 2 to the gap between the first pressure roller 41 and the second pressure roller 42. The center plane of the limiting space 7 is on the same horizontal plane as the gap between the first pressure roller 41 and the second pressure roller 42. This arrangement can reduce the displacement of the composite current collector entering between the first pressure roller 41 and the second pressure roller 42 to a certain extent. Furthermore, multiple sets of rollers 10 are respectively provided on the two opposite sides of the first limiting plate 5 and the second limiting plate 6. The rollers 10 on the first limiting plate 5 and the rollers 10 on the second limiting plate 6 are symmetrically arranged. Under the guidance of the multiple sets of symmetrical rollers 10, the composite current collector moves towards the rollers. The directional movement of the pressure component 4 further ensures the stable transmission of the composite current collector, reduces transmission deviation, and acts as a correction mechanism, guiding it back to the correct transmission path. This reduces the scrap rate caused by positional deviations and improves the consistency of the pressure applied to the composite current collector's protrusions by the first pressure roller 41 and the second pressure roller 42. On the other hand, it limits the movement of the composite current collector, preventing friction and scratching between it and the first limiting plate 5 and the second limiting plate 6 during transmission, thus avoiding damage to the surface of the composite current collector and affecting product performance. The first fin 51 of the first limiting plate 5 and the second fin 61 of the second limiting plate 6 are funnel-shaped. This design facilitates the placement of the composite current collector into the limiting space 7, improving the shaping efficiency of the composite current collector.
[0028] In one or more embodiments, heating components are provided in both the first limiting plate 5 and the second limiting plate 6. The heating components are heating resistance wires 11. When the composite current collector passes through the limiting space 7, the heating resistance wires 11 are energized and heated to generate high temperature, which heats the composite current collector passing through the limiting space 7, so that the polymer core layer of the composite current collector is in a slightly molten state. At this time, the composite current collector enters the roller pressing component 4. Under the pressure of the first pressure roller 41 and the second pressure roller 42, the protrusions on the surface of the composite current collector are more easily rolled flat, improving the rolling effect.
[0029] In one or more embodiments, the first limiting plate 5 and the second limiting plate 6 are mounted on the second adjusting device 8. The second adjusting device 8 can adjust the gap between the first limiting plate 5 and the second limiting plate 6 to change the size of the limiting space 7 and the gap between the symmetrically arranged rollers 10. It is suitable for composite current collectors of different widths and has high practicality. The second adjusting device 8 includes at least a bracket 81. The bracket 81 has a first waist-shaped hole 811 and a second waist-shaped hole 812 opened in the vertical direction. The first limiting plate 5 is mounted in the first waist-shaped hole 811 of the bracket 81 by means of a first bolt, and the second limiting plate 6 is mounted in the second waist-shaped hole 812 of the bracket 81 by means of a second bolt.
[0030] See Figure 2 The bracket 81 is vertically mounted on the frame 1. The first limiting plate 5 is installed in the first oblong hole 811 of the bracket 81 by the first bolt, and the second limiting plate 6 is installed in the second oblong hole 812 of the bracket 81 by the second bolt. When adjusting the distance between the first limiting plate 5 and the second limiting plate 6, it is only necessary to adjust the position of the first bolt in the first oblong hole 811 and the position of the second bolt in the second oblong hole 812. It has the characteristics of simple adjustment structure and convenient operation, and is practical.
[0031] In one or more embodiments, both the first limiting plate 5 and the second limiting plate 6 have rounded corners at their ends facing the roller pressing assembly 4. This arrangement reduces wear on the composite current collector at the ends of the first limiting plate 5 and the second limiting plate 6, thereby improving the molding quality of the composite current collector.
[0032] In one or more embodiments, the first adjusting device 43 includes at least a bidirectional screw vertically rotatably mounted on the frame 1 and a first driving device for driving the bidirectional screw to rotate. The first pressure roller 41 is mounted on the forward thread of the bidirectional screw via a first slider, and the second pressure roller 42 is mounted on the reverse thread of the bidirectional screw via a second slider. It should be noted that the first driving device can be a servo motor. By controlling the forward or reverse rotation of the bidirectional screw through the first driving device, the distance between the first pressure roller 41 and the second pressure roller 42 can be increased or decreased, adapting to composite current collectors of different thicknesses and achieving adjustment of the roller pressure at the convex points of the composite current collector.
[0033] In one or more embodiments, the unwinding assembly 2 includes at least an unwinding roller 21 rotatably mounted on the frame 1 and a second drive device for driving the unwinding roller 21 to rotate; the winding assembly 3 includes at least a winding roller 31 rotatably mounted on the frame 1 and a third drive device for driving the winding roller 31 to rotate.
[0034] See Figure 1 The second drive device can be a servo motor, and the third drive device can be a servo motor. By driving the unwinding roller 21 to rotate through the second drive device, the composite current collector wound on the unwinding roller 21 can be released. At the same time, the winding roller 31 is controlled to rotate through the third drive device to pull the composite current collector released on the unwinding roller 21, so that the composite current collector that has passed through the roll forming assembly 4 and the vision inspection mechanism 9 is in a taut state, thereby improving the roll forming effect of the composite current collector on the protrusions of the present application.
[0035] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.
Claims
1. A post-nibbing device for the production of composite current collectors, characterized by, The application relates to a composite current collector manufacturing device, which comprises the following parts: a frame body, a releasing assembly and a winding assembly arranged at the two ends of the frame body along a first direction, the releasing assembly being used to release a composite current collector, and the winding assembly being used to wind the composite current collector released by the releasing assembly; a roller pressing assembly, which comprises a first roller and a second roller arranged along a vertical direction and a first adjusting device used to adjust the distance between the first roller and the second roller; and a visual inspection mechanism arranged at the side of the roller pressing assembly along the first direction and used to detect whether the convex points on the surface of the composite current collector after being pressed by the roller pressing assembly meet the standard. The first limiting plate and the second limiting plate are arranged on the side of the roller pressing assembly close to the releasing assembly, a limiting space is formed between the first limiting plate and the second limiting plate, the composite current collector released by the releasing assembly passes through the limiting space, and the end portions of the first limiting plate and the second limiting plate extend to the first roller and the second roller. The inner sides of the first limiting plate and the second limiting plate are provided with a plurality of groups of rollers, the rollers of the first limiting plate and the rollers of the second limiting plate are arranged symmetrically with each other, and the composite current collector is guided to move towards the roller pressing assembly by the plurality of groups of rollers arranged symmetrically with each other. The first limiting plate and the second limiting plate are provided with heating assemblies.
2. The bump post-processing apparatus for composite current collector preparation according to claim 1, characterized in that: The first limiting plate is provided with a first fin plate at the end close to the releasing assembly, and the second limiting plate is provided with a second fin plate at the end close to the releasing assembly.
3. The bump post-processing apparatus for composite current collector preparation according to claim 2, characterized in that: The first limiting plate and the second limiting plate are mounted on a second adjusting device, the second adjusting device can adjust the gap between the first limiting plate and the second limiting plate to change the size of the limiting space.
4. The bump post-processing apparatus for composite current collector preparation according to claim 2, characterized in that: The first limiting plate and the second limiting plate are both provided with a rounded structure at the end close to the roller pressing assembly.
5. The bump post-processing apparatus for composite current collector preparation according to claim 2, characterized in that: The first adjusting device at least comprises a bidirectional screw rod vertically rotatably mounted on the frame body, a first driving device used to drive the bidirectional screw rod to rotate, the first roller is mounted on the forward thread of the bidirectional screw rod by means of a first sliding block, and the second roller is mounted on the reverse thread of the bidirectional screw rod by means of a second sliding block.
6. The bump post-processing apparatus for composite current collector preparation according to claim 2, characterized in that: The second adjusting device at least comprises a support, a first waist-shaped hole and a second waist-shaped hole are formed in the support along the vertical direction, the first limiting plate is mounted in the first waist-shaped hole of the support by means of a first bolt, and the second limiting plate is mounted in the second waist-shaped hole of the support by means of a second bolt.
7. The bump post-processing apparatus for composite current collector preparation according to claim 2, characterized in that: The releasing assembly at least comprises a releasing roller rotatably mounted on the frame body and a second driving device used to drive the releasing roller to rotate, and the winding assembly at least comprises a winding roller rotatably mounted on the frame body and a third driving device used to drive the winding roller to rotate.
8. The bump post-processing apparatus for composite current collector preparation according to claim 1, characterized in that: 9. The bump post-processing apparatus for composite current collector preparation according to claim 6, characterized in that: 10. The bump post-processing apparatus for composite current collector preparation according to claim 1, characterized in that: