Dry pre-film forming device with cleaning assembly

Abstract

The utility model relates to battery pole piece production equipment technical field discloses a dry method pre -film forming device with cleaning component, including two parallelly arranged riser plates, be provided with a pair of steel band conveying mechanism between two riser plates, form to have film forming cavity between the steel band of a pair of steel band conveying mechanism, still include cleaning mechanism, and at least one group steel band conveying mechanism is correspondingly provided with cleaning mechanism, and cleaning mechanism includes scraper subassembly, and scraper subassembly sets up between two riser plates, and scraper subassembly abuts at the outside of steel band, is used for scraping the material on steel band. Solve the current dry method pre -film forming device through steel band extrusion in film forming process, material is extremely easy to adhere on steel band, make the flatness of steel band change, and then the membrane thickness of steel band subsequent extrusion forming is uneven, lead to the membrane forming quality is poor, and then influence the production quality and yield of battery pole piece problem.

Description

Technical Field

[0001] This utility model relates to the technical field of battery electrode production equipment, specifically to a dry pre-film forming device with a cleaning component. Background Technology

[0002] In the manufacturing process of battery electrodes, dry electrode production has unique advantages; among them, turning powder into film is a crucial step in the dry electrode production process; currently, there are various dry pre-film forming devices on the market, which can realize the conversion of powder into film to a certain extent.

[0003] In related technologies, dry pre-film forming devices generally include two vertical plates, with a pair of opposing steel belt conveyor mechanisms set between the two plates. A film-forming cavity is formed between the steel belts of the two sets of steel belt conveyor mechanisms. By driving the steel belts of the two sets of steel belt conveyor mechanisms to rotate, the material is gradually squeezed into a film through the film-forming cavity. However, in the actual production process, during the film-forming process by the steel belt extrusion, the material is very easy to adhere to the steel belt, which changes the flatness of the steel belt. As a result, the thickness of the film formed by the subsequent extrusion of the steel belt is uneven, resulting in poor film forming quality, which in turn affects the production quality and yield of battery electrode sheets. Utility Model Content

[0004] In view of this, the present invention provides a dry pre-film forming device with a cleaning component to solve the problem that in the existing dry pre-film forming device, the material easily adheres to the steel strip during the film forming process by steel strip extrusion, which changes the flatness of the steel strip and leads to uneven film thickness in the subsequent extrusion forming of the steel strip, resulting in poor film forming quality and thus affecting the production quality and yield of battery electrode sheets.

[0005] This utility model provides a dry pre-film forming device with a cleaning component, including two parallel vertical plates, a pair of steel belt conveying mechanisms between the two vertical plates, a film forming cavity formed between the steel belts of the pair of steel belt conveying mechanisms, and a cleaning mechanism. At least one set of steel belt conveying mechanisms is correspondingly provided with the cleaning mechanism. The cleaning mechanism includes a scraper assembly, which is disposed between the two vertical plates and abuts against the outside of the steel belt for scraping off the material on the steel belt.

[0006] In one alternative implementation, the scraper assembly includes:

[0007] The scraper is connected to the two vertical plates at both ends, and the scraping end of the scraper abuts against the steel strip; the extension direction of the scraping end of the scraper is opposite to the moving direction of the steel strip, and it is gradually inclined towards the steel strip.

[0008] In one alternative embodiment, the scraper assembly further includes a pressure block and an elastic element, with both ends of the scraper rotatably connected to the two upright plates; the pressure block is disposed on the upright plates; one end of the elastic element is connected to the pressure block, and the other end is connected to the end of the scraper opposite to its brush end; the elastic element has a biasing force that drives the brush end of the scraper to rotate and abut against the steel strip.

[0009] In one alternative implementation, the elastic element is a compression spring.

[0010] In one alternative embodiment, the cleaning mechanism further includes a collection trough located below the scraper assembly for collecting scraped material.

[0011] In one alternative embodiment, the cleaning mechanism further includes a brush assembly disposed between the two uprights; the brush assembly is provided on at least one side of the steel belt, and the brush assembly is used to clean the material on the steel belt.

[0012] In one optional embodiment, the brush assembly includes a brush and a brush motor; the two ends of the brush are respectively rotatably connected to the two upright plates and are driven to rotate by the brush motor.

[0013] In one optional embodiment, the brush assembly further includes a cleaning hood and a negative pressure unit. The two ends of the cleaning hood are connected to the two upright plates, and the cleaning hood covers the outside of the brush. The cleaning hood and the two upright plates form a semi-enclosed cavity. The upright plates are provided with air ducts communicating with the cavity, and the cavity is connected to the negative pressure unit through the air ducts.

[0014] In one optional embodiment, the brush assemblies are provided on both sides of the steel strip, and the two sets of brush assemblies are arranged opposite to each other.

[0015] In one alternative embodiment, each group of the steel belt conveyor mechanisms is provided with a corresponding cleaning mechanism.

[0016] The technical solution of this utility model has the following advantages:

[0017] In this invention, a scraper assembly is installed against the outer side of the steel belt. When the steel belt on the conveyor mechanism is working, the force generated by the movement of the steel belt and the scraper assembly removes the material adhering to the steel belt, keeping the surface of the steel belt relatively flat and clean. This allows the material to be evenly distributed on the steel belt and compressed into a film, greatly improving the uniformity of the film thickness, ensuring the quality of film forming, and thus improving the consistency of the battery electrodes, guaranteeing the overall performance of the battery. In addition, it avoids the risk of equipment failure caused by material adhesion, thus keeping the steel belt clean and reducing problems such as steel belt jamming and deviation caused by material adhesion. This improves the stability of equipment operation, significantly reduces downtime, and increases production efficiency. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a dry pre-film forming device with a cleaning component according to an embodiment of the present invention.

[0020] Figure 2 for Figure 1 A partial structural schematic diagram of a dry pre-film forming apparatus with a cleaning component is shown.

[0021] Figure 3 This is a schematic diagram of the cleaning mechanism according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the brush assembly according to an embodiment of the present utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Vertical plate; 2. Steel strip; 3. Film forming chamber; 4. Scraper assembly; 401. Scraper; 402. Pressure block; 403. Elastic element; 5. Brush assembly; 501. Brush; 502. Brush motor; 503. Cleaning cover; 6. Steel strip traction roller; 7. Steel strip guide roller; 8. Gap adjusting roller; 9. Steel strip correction roller; 10. Steel strip tensioning roller. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] The following is combined with Figures 1 to 4 The following describes embodiments of the present invention.

[0030] According to an embodiment of the present invention, a dry pre-film forming device with a cleaning component includes two parallel vertical plates 1, a pair of steel belt conveying mechanisms between the two vertical plates 1, a film forming cavity 3 formed between the steel belts 2 of the pair of steel belt conveying mechanisms, and a cleaning mechanism. At least one set of steel belt conveying mechanisms is correspondingly provided with a cleaning mechanism. The cleaning mechanism includes a scraper assembly 4, which is disposed between the two vertical plates 1 and abuts against the outer side of the steel belt 2 for scraping off the material on the steel belt 2.

[0031] It should be noted that the cleaning mechanism is located downstream of the film-forming chamber 3 along the moving direction of the steel belt 2.

[0032] In this embodiment, a cleaning mechanism is set between the two vertical plates 1 corresponding to the steel belt conveyor mechanism. A scraper assembly 4 is used to abut against the outside of the steel belt 2. During operation, the steel belts 2 on the two sets of steel belt conveyor mechanisms rotate towards each other, gradually squeezing the material in the film-forming chamber 3 into a film. When the steel belt 2 rotates past the scraper assembly 4, the relative movement between the steel belt 2 and the scraper assembly 4 generates a force, thereby scraping off the material adhering to the steel belt 2. This keeps the surface of the steel belt 2 relatively flat and clean, allowing the material to be evenly distributed on the steel belt 2 and squeezed into a film. This greatly improves the uniformity of the film thickness, ensures the film forming quality, and thus improves the consistency of the battery electrode sheets, ensuring the overall performance of the battery. In addition, it avoids the risk of equipment failure caused by the adhesion of material, which would lead to the smooth operation of the steel belt 2. This keeps the steel belt 2 clean, reduces problems such as jamming and deviation caused by material adhesion, improves the stability of equipment operation, significantly reduces the number of downtimes, and improves production efficiency.

[0033] In one embodiment, such as Figure 3 As shown, the scraper assembly 4 includes: a scraper 401, with both ends connected to two vertical plates 1 respectively, and the scraping end of the scraper 401 abutting against the steel belt 2; the extension direction of the scraping end of the scraper 401 is opposite to the moving direction of the steel belt 2, and it is gradually inclined towards the direction of the steel belt 2.

[0034] In this embodiment, a scraper 401 is used, with its scraping end abutting against the steel belt 2. The relative force generated when the steel belt 2 moves removes the material adhering to it, keeping the surface of the steel belt 2 relatively flat and clean. The scraping end of the scraper 401 is set at a preset angle to the steel belt 2, and its extension direction is opposite to the moving direction of the steel belt 2, in order to improve the scraping effect.

[0035] In one embodiment, such as Figure 3 As shown, the scraper assembly 4 also includes a pressure block 402 and an elastic element 403. Both ends of the scraper 401 are rotatably connected to the two vertical plates 1. The pressure block 402 is disposed on the vertical plate 1. One end of the elastic element 403 is connected to the pressure block 402, and the other end is connected to the end of the scraper 401 away from its scraping end. The elastic element 403 has a biasing force that drives the scraping end of the scraper 401 to rotate and abut against the steel belt 2.

[0036] In this embodiment, the scraper 401 is rotatably connected to the upright plate 1. At the same time, by setting the pressure block 402 and the elastic element 403, the elastic force of the elastic element 403 acts on the end of the scraper 401 away from its scraping end, providing a continuous biasing force for the rotation of the scraper 401. This allows the scraper 401 to adapt to the rotating steel belt 2, so that the scraping end of the scraper 401 can be tightly attached to the steel belt 2, ensuring the scraping effect.

[0037] Specifically, such as Figure 3 As shown, each upright plate 1 is provided with a pressure block 402. The two pressure blocks 402 are connected to both ends of the scraper 401 through elastic elements 403, so that the force is evenly distributed and the cleaning effect is improved.

[0038] In one embodiment, the elastic element 403 is a compression spring.

[0039] In this embodiment, the elastic element 403 is a compression spring. During operation, the compression spring is always in a compressed state so as to provide elastic force for the scraper 401 to abut against the steel belt 2.

[0040] Specifically, such as Figure 3 As shown, both ends of the scraper 401 are provided with rotating shafts, which are rotatably connected to the vertical plate 1 through bearings, thereby reducing the friction force when the scraper 401 rotates and improving its service life.

[0041] Specifically, the pressure block 402 is fixed to the upright plate 1 by bolts to improve stability.

[0042] In one embodiment, the cleaning mechanism further includes a collection trough located below the scraper assembly 4 for collecting the scraped material.

[0043] In this embodiment, a collection trough is provided below the scraper assembly 4 to collect the material scraped off by the scraper assembly 4, so as to recycle and process it in a unified manner and improve the cleaning effect.

[0044] In one embodiment, such as Figures 1 to 4 As shown, the cleaning mechanism also includes a brush assembly 5, which is disposed between the two upright plates 1; the steel belt 2 is provided with a brush assembly 5 on at least one side, and the brush assembly 5 is used to clean the material on the steel belt 2.

[0045] It should be noted that the cleaning mechanism is located downstream of the scraper assembly 4 along the moving direction of the steel belt 2.

[0046] In this embodiment, the brush assembly 5 is set to further clean the surface of the steel strip 2, clean the material that the scraper assembly 4 did not clean, sweep away the residual fine particles, further improve the cleaning effect, avoid defects such as pits on the film caused by residual material, ensure the surface smoothness of the film, and comprehensively improve the quality of the film, providing a high-quality base material for the subsequent production of battery electrode sheets.

[0047] In one embodiment, such as Figure 3 and Figure 4 As shown, the brush assembly 5 includes a brush 501 and a brush motor 502; the two ends of the brush 501 are rotatably connected to the two upright plates 1 respectively, and are driven to rotate by the brush motor 502.

[0048] It should be noted that the brush is in contact with the surface of the steel strip 2.

[0049] In this embodiment, the two ends of the brush 501 are rotatably connected to the two upright plates 1. During cleaning, the brush motor 502 drives the brush 501 to rotate and clean the surface of the steel belt 2, cleaning up the residual fine particles on the steel belt 2 and further improving the cleaning effect.

[0050] In one embodiment, such as Figure 3 and Figure 4 As shown, the brush assembly 5 also includes a cleaning cover 503 and a negative pressure unit. The two ends of the cleaning cover 503 are connected to the two upright plates 1, and the cleaning cover 503 covers the outside of the brush 501. The cleaning cover 503 and the two upright plates 1 form a semi-closed cavity. The upright plates 1 are provided with air ducts that communicate with the cavity, and the cavity is connected to the negative pressure unit through the air ducts.

[0051] In this embodiment, a cleaning hood 503 is set up and covers the brush 501. The cleaning hood 503 and the two upright plates 1 form a semi-enclosed cavity. The opening of the cavity faces the steel belt 2, forming a more enclosed space with the steel belt 2. During the cleaning process, the negative pressure machine is turned on to generate negative pressure in the cavity, so that the material swept off by the brush can be adsorbed into the negative pressure machine, effectively collecting the dust generated during the cleaning process. On the one hand, it improves the production environment, and on the other hand, it reduces the harm of dust to the health of operators. It also avoids dust flying in the workshop and causing pollution to other equipment, further improving the cleaning effect. In addition, due to the improved cleaning degree of the steel belt 2, the maintenance workload and maintenance cost of the equipment are reduced.

[0052] Specifically, a mounting plate is provided on the upright plate 1 corresponding to the brush 501. Both ends of the brush 501 are connected to the mounting plate through bearings to improve stability.

[0053] In one embodiment, such as Figure 3 and Figure 4 As shown, brush assemblies 5 are provided on both sides of the steel strip 2, and the two sets of brush assemblies 5 are arranged opposite each other.

[0054] In this embodiment, brush assemblies 5 are provided on both the inner and outer sides of the steel strip 2, and the two sets of brush assemblies 5 are arranged opposite each other to further improve the cleaning effect.

[0055] Specifically, such as Figure 3 and Figure 4 As shown, a brush motor 502 is provided, and the brushes 501 of both sets of brush assemblies 5 are driven and connected to the output shaft of the brush motor 502. For example, a first gear is provided on the output shaft of the brush motor 502, and a second gear is provided at the end of each of the two brushes 501. The second gear meshes with the first gear for transmission. The two sets of brush assemblies 5 are driven by one brush motor 502, which saves costs and improves space utilization.

[0056] In one embodiment, such as Figure 1 and Figure 2 As shown, each group of steel belt conveyor mechanisms is equipped with a corresponding cleaning mechanism.

[0057] In this embodiment, each group of steel belt conveyor mechanisms is equipped with a corresponding cleaning mechanism to further improve the overall cleaning effect.

[0058] Specifically, each steel strip conveying mechanism includes a roller assembly and a steel strip 2. The roller assembly is positioned between two vertical plates 1 and includes a steel strip traction roller 6, a steel strip guide roller 7, a gap adjusting roller 8, a steel strip correction roller 9, and a steel strip tensioning roller 10 arranged sequentially. The steel strip 2 is arranged in an orderly fashion around the steel strip traction roller 6, the steel strip guide roller 7, the gap adjusting roller 8, and the steel strip correction roller 9. The steel strip tensioning roller 10 abuts against the outer side of the steel strip 2 to adjust the tension of the steel strip 2. The steel strip traction roller 6 is rotatably connected to the vertical plate 1, and is driven by a drive motor on the vertical plate 1 to rotate the steel strip traction roller 6. As belt 2 rotates, an upper steel belt 2 support plate is provided between the steel belt traction roller 6 and the steel belt passing roller 7 to abut against the steel belt 2; a lower steel belt 2 support plate is provided between the steel belt passing roller 7 and the gap adjusting roller 8 to support the steel belt 2; a Y-shaped cavity is formed between the steel belt 2 of the two sets of steel belt conveying mechanisms and the two vertical plates 1. The Y-shaped cavity includes a feeding cavity and a film forming cavity 3 connected from top to bottom. The steel belt traction roller 6 is driven by the drive motor to rotate, causing the two steel belts 2 to rotate in opposite directions at a preset speed. The material is fed from the feeding cavity to the film forming cavity 3 and gradually squeezed between the two steel belts 2 to form a uniform film.

[0059] Specifically, the scraper assembly 4 is positioned below the gap adjusting roller 8, and the scraping end of the scraper 401 abuts against the steel belt 2 relative to the gap adjusting roller 8. This allows the gap adjusting roller 8 to provide a certain support force to the scraping end of the scraper 401, preventing the steel belt 2 from deviating under the force of the scraper 401. This ensures that the scraper 401 can fit tightly against the steel belt 2, thereby improving the cleaning effect.

[0060] The specific working principle of the dry pre-film forming device with cleaning components provided in this embodiment is as follows: During operation, the steel belt traction rollers 6 of the two sets of steel belt conveyor mechanisms rotate, driving the steel belts 2 to rotate, so that the two steel belts 2 cooperate to extrude the powder into a film. While the steel belts 2 rotate, the scraper 401 located downstream of the film forming chamber 3 is always in contact with the outside of the steel belts 2 under the elastic force of the compression spring. As the steel belts 2 move, the material on the steel belts 2 is scraped off by the scraper 401 and falls into the collection tank. At the same time, the brush motor 502 drives the brush 501 to rotate and sweep away the residual fine particles on the steel belts 2, and the negative pressure machine sweeps away the fallen fine particles, thereby achieving the cleaning of the steel belts 2 and ensuring the cleaning effect of the steel belts 2, so that the surface of the steel belts 2 always remains relatively flat and clean, and so that the material can be effectively cleaned. The uniform distribution and extrusion of the film on the steel strip 2 greatly improves the uniformity of the film thickness, ensures the film forming quality, and thus improves the consistency of the battery electrode sheets, ensuring the overall performance of the battery. It avoids the risk of equipment failure caused by material adhesion leading to poor operation of the steel strip 2, and keeps the steel strip 2 clean. It also reduces problems such as jamming and deviation caused by material adhesion, improves the stability of equipment operation, significantly reduces the number of downtimes, and improves production efficiency. This solves the problem in existing dry pre-film forming devices where material easily adheres to the steel strip 2 during the film forming process, changing the flatness of the steel strip 2 and resulting in uneven film thickness after subsequent extrusion, leading to poor film forming quality and affecting the production quality and yield of battery electrode sheets.

[0061] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A dry pre-film forming apparatus with a cleaning component, comprising two parallel vertical plates (1), a pair of steel belt conveying mechanisms disposed between the two vertical plates (1), and a film forming cavity (3) formed between the steel belts (2) of the pair of steel belt conveying mechanisms, characterized in that, It also includes a cleaning mechanism, and at least one set of the steel belt conveying mechanism is correspondingly provided with the cleaning mechanism. The cleaning mechanism includes a scraper assembly (4), which is disposed between the two vertical plates (1) and abuts against the outside of the steel belt (2) for scraping off the material on the steel belt (2).

2. The dry pre-film forming apparatus with cleaning component according to claim 1, characterized in that, The scraper assembly (4) includes: The scraper (401) is connected to the two vertical plates (1) at both ends, and the scraping end of the scraper (401) abuts against the steel strip (2); the extension direction of the scraping end of the scraper (401) is opposite to the moving direction of the steel strip (2), and it is gradually inclined towards the steel strip (2).

3. The dry pre-film forming apparatus with cleaning component according to claim 2, characterized in that, The scraper assembly (4) further includes a pressure block (402) and an elastic element (403). Both ends of the scraper (401) are rotatably connected to the two vertical plates (1). The pressure block (402) is disposed on the vertical plate (1). One end of the elastic element (403) is connected to the pressure block (402), and the other end is connected to the end of the scraper (401) away from its scraping end. The elastic element (403) has a biasing force that drives the scraping end of the scraper (401) to rotate and abut against the steel strip (2).

4. The dry pre-film forming apparatus with cleaning component according to claim 3, characterized in that, The elastic element is a compression spring.

5. The dry pre-film forming apparatus with cleaning component according to claim 1, characterized in that, The cleaning mechanism also includes a collection trough located below the scraper assembly (4) for collecting scraped material.

6. The dry pre-film forming apparatus with a cleaning component according to any one of claims 1 to 5, characterized in that, The cleaning mechanism also includes a brush assembly (5) disposed between the two uprights (1); the brush assembly (5) is provided on at least one side of the steel belt (2), and the brush assembly (5) is used to clean the material on the steel belt (2).

7. The dry pre-film forming apparatus with cleaning component according to claim 6, characterized in that, The brush assembly (5) includes a brush (501) and a brush motor (502); the two ends of the brush (501) are rotatably connected to the two upright plates (1) respectively, and are driven to rotate by the brush motor (502).

8. The dry pre-film forming apparatus with cleaning component according to claim 7, characterized in that, The brush assembly (5) further includes a cleaning cover (503) and a negative pressure unit. The two ends of the cleaning cover (503) are connected to the two upright plates (1), and the cleaning cover (503) covers the outside of the brush (501). The cleaning cover (503) and the two upright plates (1) form a semi-closed cavity. The upright plates (1) are provided with air ducts that communicate with the cavity, and the cavity is connected to the negative pressure unit through the air ducts.

9. The dry pre-film forming apparatus with a cleaning component according to claim 6, characterized in that, The steel strip (2) is provided with brush assemblies (5) on both sides, and the two sets of brush assemblies (5) are arranged opposite to each other.

10. The dry pre-film forming apparatus with cleaning component according to claim 1, characterized in that, Each of the steel belt conveyor mechanisms is equipped with a corresponding cleaning mechanism.

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