Film surface particle removing mechanism and device

Abstract

The utility model relates to the technical field of lithium battery production, and particularly discloses a mechanism and a device for removing particles on the surface of a film. Comprising a back roller which is driven by a rotary driving part to rotate; the removing unit is arranged opposite to the back roller, and a gap is reserved between the removing unit and the back roller to form a roller gap; the adjusting module is arranged between the back roller and the removing unit, and the adjusting module is in transmission connection with the removing unit so as to drive the removing unit to be close to or away from the back roller. The device has the following technical effects that particles on the composite current collector film are automatically scraped, the surface flatness of the composite current collector film is ensured, the performance of a battery is improved, the production efficiency is high, and the operation is simple.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production, and particularly relates to a mechanism and device for removing particles from a film surface. Background Art

[0002] Composite current collector film is a material in the field of lithium-ion batteries. It adopts a three-layer composite structure of "metal-polymer material-metal" and is made by plating one or more layers of metal (such as copper, aluminum) on the surface of a polymer material (such as PET, PP, PI, etc.). In the manufacturing process of the composite current collector film, there are certain requirements for the thickness and surface flatness of the finished product. However, in the actual production process, there may be large protruding particles on the surface of the uniform film. The particles will affect the uniformity of the coating and form scratches on the coating surface. When assembled into a battery, the particles are in direct contact with the diaphragm inside the battery, which can easily cause the diaphragm to be punctured, thereby affecting the electrochemical performance of the battery, and may even cause internal short circuit or thermal runaway of the battery.

[0003] The existing treatment method is mostly to manually use scraping tools such as scrapers to scrape the particles on the surface of the composite current collector. This method is time-consuming and labor-intensive, and there is a phenomenon of missed scraping. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the utility model provides a mechanism and device for removing particles from the surface of a thin film.

[0005] The technical effects to be achieved by the present invention are achieved through the following technical aspects:

[0006] In a first aspect, a device for removing particles from a film surface is provided, comprising:

[0007] The back roller is driven to rotate by the rotary drive member;

[0008] a rejecting unit, disposed opposite to the backing roller, with a gap between the rejecting unit and the backing roller to form a roller gap; and

[0009] The adjusting module is arranged between the backing roller and the rejecting unit, and the adjusting module is in transmission connection with the rejecting unit to drive the rejecting unit to move closer to or away from the backing roller.

[0010] In some embodiments, the removal unit is a scraper, and the scraper is arranged along the length direction of the backing roller.

[0011] In some embodiments, the adjustment module includes a first driving unit, and a driving end of the first driving unit is connected to the rejection unit.

[0012] In some embodiments, the adjustment module further includes a connector and a fine-tuning component;

[0013] The driving end of the first driving unit is connected to one end of the connecting member, and the rejecting unit is detachably connected to the other end of the connecting member;

[0014] The fine-adjustment component is disposed between the connecting member and the rejecting unit, and the fine-adjustment component is configured to drive the rejecting unit to move relative to the backing roller to adjust the height of the roller gap.

[0015] In some embodiments, the fine-tuning assembly includes a second drive unit and an inclined block, the inclined surface of the inclined block abuts against the connecting member, and the second drive unit is transmission-connected to the inclined block to drive the inclined block to move, thereby driving the connecting member to move closer to or away from the back roller.

[0016] In some embodiments, a first mounting seat is provided at the end of the back roller, and the adjustment module is provided on the first mounting seat.

[0017] In some embodiments, the second mounting seat is further included, the second mounting seat is arranged on the first mounting seat, and a surface of the second mounting seat facing away from the first mounting seat is an inclined surface;

[0018] Adjustment modules are respectively provided at both ends of the rejection unit, and the adjustment modules are arranged on the inclined surface of the second mounting seat.

[0019] In some embodiments, an angle between the inclined surface of the second mounting seat and the bottom surface of the second mounting seat is an acute angle.

[0020] In some embodiments, a roll gap detection sensor for detecting the height of the roll gap is provided on one side of the roll gap.

[0021] In a second aspect, a device for removing particles from a thin film surface is provided, comprising a device for removing particles from a thin film surface as described in any one of the above technical solutions.

[0022] In summary, the present invention has the following advantages:

[0023] The present invention can automatically scrape off particles on the composite current collector film by setting a back roller, a removal unit and an adjustment module, ensuring the surface flatness of the composite current collector film, improving the performance of the battery, and at the same time eliminating the possibility of subsequent particles piercing the internal diaphragm of the battery, thereby causing danger. When in use, it is only necessary to determine the size of the particles to be scraped off, adjust the size of the roller gap between the removal device and the back roller through the adjustment module, and then pass the composite current collector film through the roller gap. Under the rotation of the back roller, the composite current collector is transferred, and the particles on the surface of the composite current collector film can be automatically removed by the removal unit. Compared with the existing manual scraping method, the film surface particle removal mechanism in this application is simple to operate and has high removal efficiency. It can realize automatic scraping without the problem of missed scraping. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the film surface particle removal mechanism in an embodiment of the present application.

[0025] Figure 2 It is a top view of the film surface particle removal mechanism in an embodiment of the present application.

[0026] Figure 3 It is a cross-sectional view at AA in the embodiment of the present application.

[0027] Figure 4 It is a front view of the film surface particle removal mechanism in an embodiment of the present application.

[0028] Figure 5 It is a cross-sectional view at BB in the embodiment of the present application.

[0029] Markings in the figure:

[0030] 1. Back roller; 2. Rejection unit; 3. Adjustment module; 310. First drive unit; 320. Connector; 330. Fine-tuning assembly; 331. Second drive unit; 332. Inclined block; 4. Rotary drive member; 5. Roll gap; 6. First mounting seat; 7. Second mounting seat; 8. Roll gap sensor. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] Please see the attached Figure 1 This embodiment provides a thin film surface particle removal mechanism, which is primarily used to remove particles from a composite current collector thin film to improve battery performance. The thin film surface particle removal mechanism includes a backing roller 1, a removal unit 2, and an adjustment module 3.

[0035] The back roller 1 is rotated by a rotary drive 4. The rotary drive 4 may be a drive device such as a servo motor or a steering gear, which is not limited in this embodiment. During use, the rotary drive 4 can be connected to the back roller 1 via a speed reducer, thereby driving the back roller 1 to rotate. This provides active power to the back roller 1, facilitating subsequent conveying of the current collector on the back roller 1. Conveying refers to the process of transporting composite current collector films and electrodes along a specific path and speed during production.

[0036] The rejecting unit 2 is arranged opposite to the backing roller 1 , and a gap is left between the rejecting unit 2 and the backing roller 1 to form a roller gap 5 .

[0037] Specifically, the removal unit 2 is used to remove particulate matter from the composite current collector film. It can be a laser removal device or a scraper. The removal unit 2 is arranged opposite the backing roller 1, and a roller gap 5 is formed between the removal unit 2 and the backing roller 1. During use, the composite current collector film passes through the roller gap 5, thereby achieving its conveyance on the backing roller 1.

[0038] The adjusting module 3 is disposed between the backing roller 1 and the rejecting unit 2 , and the adjusting module 3 is transmission-connected to the rejecting unit 2 to drive the rejecting unit 2 to move closer to or away from the backing roller 1 .

[0039] Among them, the adjustment module 3 is used to adjust the distance between the rejection unit 2 and the back roller 1, so that it can meet the requirements of rejecting particles of different sizes and prevent the omission of some small-sized particles during subsequent use. The adjustment module 3 can be a combination of a cylinder or a drive motor and a ball screw, or can manually adjust the distance between the rejection unit 2 and the back roller 1 through a device such as a nut. The specific design method is not limited in this embodiment. It only needs to drive the rejection unit 2 closer to or away from the back roller 1 to adjust the size of the roller gap 5. Preferably, the adjustment module 3 is arranged between the back roller 1 and the rejection unit 2, and its drive end is connected to the rejection unit 2. In this way, the volume of the equipment can be reduced and the convenience of installation can be improved.

[0040] During use, assuming the uniform thickness of the electrode sheet is X, particles with a height exceeding A are considered large particles and are removed. The height of the roller gap 5 between the rejection unit 2 and the backing roller 1 is adjusted to X plus A by adjusting the module 3. At this time, the composite current collector film passes through the roller gap 5, and the rotary drive member 4 drives the backing roller 1 to rotate, and the composite current collector film is conveyed. The rejection unit 2 can then automatically remove large particles on the composite current collector film.

[0041] This embodiment is capable of automatically scraping off particles on the composite current collector film by providing a back roller 1, a removal unit 2, and an adjustment module 3, thereby ensuring the surface flatness of the composite current collector film, improving the performance of the battery, and reducing the possibility of subsequent particles piercing the internal diaphragm of the battery, thereby causing danger. When in use, it is only necessary to determine the size of the particles to be scraped off, adjust the size of the roller gap 5 between the removal device and the back roller 1 through the adjustment module, and then pass the composite current collector film through the roller gap 5. Under the rotation of the back roller 1, the composite current collector is transferred to automatically remove the particles on the surface of the composite current collector film. Compared with the existing manual scraping method, the film surface particle removal mechanism in this embodiment is simple to operate, has high removal efficiency, can realize automatic scraping, and will not miss any scraping.

[0042] Example 2

[0043] The difference between Example 2 and Example 1 is that this example further optimizes the particle removal mechanism on the film surface. Figure 2-5 As shown. In some embodiments, the removal unit 2 is a scraper, and the scraper is arranged along the length direction of the back roller 1. Specifically, the scraper can remove particles on the surface of the film, and the scraper has low cost and stable operation. The scraper is arranged along the length direction of the back roller 1, and the scraper is arranged parallel to the back roller 1 to increase the removal area. The length of the scraper is greater than the width of the composite current collector film. During use, when some particles are large and difficult to remove, the high-precision scraper can scrape off the particle electrode, and then after removing the large particles through external equipment, the composite current collector film is spliced ​​to continue producing the film.

[0044] In some embodiments, the adjustment module 3 includes a first drive unit 310, the drive end of which is connected to the rejection unit 2. The first drive unit 310 can be a cylinder or a combination of a drive motor and a ball screw. For example, the first drive unit 310 is a cylinder, the drive end of which is connected to the rejection unit 2, thereby driving the movement of the rejection unit 2.

[0045] In some embodiments, the adjustment module 3 also includes a connector 320 and a fine-tuning assembly 330; the driving end of the first driving unit 310 is connected to one end of the connector 320, and the rejection unit 2 is detachably connected to the other end of the connector 320; the fine-tuning assembly 330 is arranged between the connector 320 and the rejection unit 2, and the fine-tuning assembly 330 is configured to drive the rejection unit 2 to move relative to the back roller 1 to adjust the height of the roller gap 5.

[0046] Specifically, the fine-tuning assembly 330 is used to finely adjust the roller gap 5 between the rejection unit 2 and the backing roller 1, thereby improving the rejection accuracy. The connecting member 320 is a connecting block, which is used to connect the first drive unit 310, the fine-tuning assembly 330, and the rejection unit 2 together. The specific connection method can be that the driving end of the first drive unit 310 is connected to one end of the connecting block, the fine-tuning assembly 330 is connected to the other end of the connecting block, and the driving end of the fine-tuning assembly 330 is connected to the rejection unit 2. Alternatively, the first drive unit 310 can be a cylinder, the driving end of the cylinder is connected to the connecting block, the other end of the connecting block is connected to the rejection unit 2, the driving end of the fine-tuning assembly 330 is connected to the connecting block, and the other end of the fine-tuning assembly 330 is fixedly connected. In this case, when the cylinder is extended and retracted into place, the fine-tuning assembly 330 can make slight adjustments to the position of the connecting block. The rejection unit 2 adopts a detachable connection to facilitate subsequent replacement. The detachable connection can be a nut connection, a snap connection, etc. The fine-tuning assembly 330 can be a combination of an adjusting bolt, a motor and a screw guide rail, etc., which is used to drive the connecting block to move.

[0047] During use, the first driving unit 310 first drives the connecting block to press down. At this time, the rejection unit 2 moves down with the connecting block, and the position of the rejection unit 2 is preliminarily adjusted. Subsequently, the fine-tuning component 330 adjusts the position between the rejection unit 2 and the connecting block, and fine-tunes the rejection unit 2.

[0048] Furthermore, the fine-tuning assembly 330 includes a second drive unit 331 and an inclined block 332. The inclined block 332 is disposed on one side of the connecting member 320, and the inclined surface of the inclined block 332 abuts against the connecting member 320. The second drive unit 331 is in transmission connection with the inclined block 332 to drive the inclined block 332 to move, thereby driving the connecting member 320 toward or away from the back roller 1. A support base is introduced, which is fixedly disposed at the end of the back roller 1. The first drive unit 310 is disposed on one side of the support base, and the connecting member 320 is connected to the driving end of the first drive unit 310. The inclined block 332 is disposed between the support base and the connecting member 320. The inclined surface of the inclined block 332 abuts against the connecting member 320, and the other surface abuts against the support base. The second drive unit 331 is in transmission connection with the inclined block 332 to drive the inclined block 332 to move, and the connecting member 320 moves upward or downward driven by the inclined surface. The second driving unit 331 is a combination of a motor and a screw, and the inclined block 332 is movably connected to the screw, and the inclined block 332 is driven by rotating the screw.

[0049] In some embodiments, the ends of the backing roller 1 are provided with first mounting seats 6, and the adjustment module 3 is disposed on the first mounting seats 6. Specifically, the first mounting seats 6 are bearing seats, which are disposed at both ends of the backing roller 1 to enable the backing roller 1 to rotate. Simultaneously, the adjustment module 3 can be disposed on the first mounting seats 6, assembling the film surface particle removal mechanism to reduce floor space.

[0050] In some embodiments, the device further includes a second mounting seat 7, which is disposed on the first mounting seat 6 and has an inclined surface facing away from the first mounting seat 6. Adjustment modules 3 are provided at both ends of the removal unit 2, and the adjustment modules 3 are disposed on the inclined surface of the second mounting seat 7. The second mounting seat 7 is disposed on the first mounting seat 6 and has an inclined surface, the inclination of which is set according to actual conditions. The adjustment module 3 is disposed on the inclined surface to allow the scraper to have an inclined angle relative to the film passing through the roller gap 5, making it easier to scrape off particles. Preferably, the angle between the inclined surface of the second mounting seat 7 and the bottom surface of the second mounting seat 7 is acute.

[0051] In some embodiments, a roll gap 5 detection sensor for detecting the height of the roll gap 5 is provided on one side of the roll gap 5. The roll gap 5 detection sensor can detect the height of the roll gap 5 to facilitate subsequent automated control.

[0052] Example 3

[0053] This embodiment provides a device for removing particles from a thin film surface, capable of automatically removing particles from the film, including a film surface particle removal mechanism. The device may further include a roller, a tension adjustment roller, and the like. The film is fed along the roller, and the tension adjustment roller adjusts the tension of the film. The film surface particle removal mechanism is disposed on the device along the feeding direction of the film, capable of removing particles from the film surface, ensuring the surface smoothness of the composite current collector film, improving battery performance, and reducing the possibility of subsequent particles piercing the internal separator of the battery, thereby causing danger.

[0054] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0055] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0056] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0057] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. A film surface particle removal mechanism, characterized in that: include The back roller is driven to rotate by the rotary drive member; a rejecting unit, disposed opposite to the backing roller, with a gap between the rejecting unit and the backing roller to form a roller gap; as well as The adjusting module is arranged between the backing roller and the rejecting unit, and the adjusting module is in transmission connection with the rejecting unit to drive the rejecting unit to move closer to or away from the backing roller.

2. The thin film surface particle removal mechanism according to claim 1, characterized in that: The removal unit is a scraper, and the scraper is arranged along the length direction of the backing roller.

3. The thin film surface particle removal mechanism according to claim 1, characterized in that: The adjustment module includes a first driving unit, and a driving end of the first driving unit is connected to the rejecting unit.

4. The thin film surface particle removal mechanism according to claim 3, characterized in that: The adjustment module also includes a connecting piece and a fine-tuning component; The driving end of the first driving unit is connected to one end of the connecting member, and the rejecting unit is detachably connected to the other end of the connecting member; The fine-adjustment component is disposed between the connecting member and the rejecting unit, and the fine-adjustment component is configured to drive the rejecting unit to move relative to the backing roller to adjust the height of the roller gap.

5. The thin film surface particle removal mechanism according to claim 4, characterized in that: The fine-tuning assembly includes a second driving unit and an inclined block. The inclined block is arranged on one side of the connecting member. The inclined surface of the inclined block abuts against the connecting member. The second driving unit is transmission-connected to the inclined block to drive the inclined block to move, thereby driving the connecting member to move closer to or away from the back roller.

6. The thin film surface particle removal mechanism according to claim 1, characterized in that: A first mounting seat is provided at the end of the back roller, and the adjustment module is provided on the first mounting seat.

7. The thin film surface particle removal mechanism according to claim 6, characterized in that: The second mounting seat is provided on the first mounting seat, and a side of the second mounting seat facing away from the first mounting seat is an inclined surface; Adjustment modules are respectively provided at both ends of the rejection unit, and the adjustment modules are arranged on the inclined surface of the second mounting seat.

8. The thin film surface particle removal mechanism according to claim 7, characterized in that: An angle between the inclined surface of the second mounting seat and the bottom surface of the second mounting seat is an acute angle.

9. The thin film surface particle removal mechanism according to claim 1, characterized in that: A roll gap detection sensor for detecting the height of the roll gap is provided on one side of the roll gap.

10. A device for removing particles from a film surface, characterized in that: The device comprises the film surface particle removal mechanism according to any one of claims 1 to 9.

Images