Slurry edge scraping device

Abstract

The invention discloses a slurry edge scraping device which comprises a plurality of conveying rollers used for conveying foil materials, and the foil materials are coated with slurry. The device further comprises at least one scraping and sucking assembly which is arranged above the conveying roller, the scraping and sucking assembly comprises a scraper and a vacuum cavity, the scraper is used for scraping the edge of the slurry in the foil conveying direction, and the vacuum cavity is externally connected with a negative pressure device and used for pumping away the scraped slurry. According to the slurry edge scraping device, the scraping and sucking assembly is arranged above the foil, slurry with non-uniform thickness on the edge of the foil is scraped and extracted in the foil conveying process, and the coating uniformity is improved.

Description

Technical Field

[0001] The invention belongs to the field of lithium battery automation equipment, and in particular relates to a slurry edge scraping device. Background Art

[0002] In the manufacturing process of lithium-ion battery pole pieces, the coating process usually uses an extrusion die to apply slurry to the surface of foil (such as aluminum foil, copper foil). However, due to the surface tension of the slurry itself, it is easy to produce thinning (thickness reduction) or thickening (edge ​​accumulation) in the edge area during the coating process, such as Figure 6 As shown in the left view, the uneven coating thickness will affect the quality of the electrode. What the industry needs is a electrode with uniform coating thickness, such as Figure 6 As shown in the right side view S2.

[0003] In the prior art, common edge thickness control methods mainly include: (1) adjusting the extrusion die gasket: by reducing or thickening the gasket at the edge of the die to change the slurry outflow gap, thereby compensating for the edge thickness difference. However, this method requires manual adjustment of the gasket before each coating, which is cumbersome and inefficient. (2) Edge tape method: before coating, tape is attached to the edge of the current collector along the coating direction, and after coating and drying, the tape is torn off to remove excess slurry at the edge. However, this method has the risk of coating tearing, which affects the electrode yield, and the tape operation increases the cost of materials and labor. Summary of the Invention

[0004] The object of the present invention is to provide a slurry edge scraping device which can improve the edge smoothing effect.

[0005] To achieve the above-mentioned purpose, the slurry edge scraping device of the present invention comprises: a plurality of conveying rollers for conveying a foil material coated with slurry; At least one scraping and suction assembly is arranged above the conveying roller. The scraping and suction assembly includes a scraper and a vacuum chamber. The scraper is used to scrape the edge of the slurry along the foil conveying direction. The vacuum chamber is externally connected to a negative pressure device for extracting the scraped slurry.

[0006] In one embodiment of the slurry edge scraping device of the present invention, it further comprises an angle adjustment assembly, and the scraping and suction assembly is mounted on the angle adjustment assembly to adjust the angle between the scraper of the scraping and suction assembly and the foil.

[0007] In one embodiment of the slurry edge scraping device of the present invention, the angle adjustment assembly is provided with two groups, which are respectively located on both sides of the foil along the width direction; The angle adjustment assembly includes a fixed plate and a movable plate, wherein the fixed plate is rotatably connected to the movable plate; The movable plate is provided with an arc-shaped hole, the fixed plate is provided with a threaded hole corresponding to the arc-shaped hole, and the fixed plate and the movable plate are fixed by fasteners passing through the arc-shaped hole and the threaded hole.

[0008] In one embodiment of the slurry edge scraping device of the present invention, the side wall of the movable plate forms a step surface, the upper surface of the fixed plate and the side wall of the movable plate are in a matching arc shape, the upper surface of the fixed plate is rotatably connected to a plurality of rollers, and the step surface of the movable plate is in rolling contact with the plurality of rollers.

[0009] In one embodiment of the slurry edge scraping device of the present invention, the device further comprises a first driving member for driving the scraping and sucking assembly to approach or move away from the foil.

[0010] In one embodiment of the slurry edge scraping device of the present invention, it also includes a second driving member and a sensor, wherein the sensor is arranged upstream of the scraping and suction assembly in the direction of foil feeding, and is used to detect the offset of the foil; the second driving member is connected to the scraping and suction assembly, and is used to drive the scraping and suction assembly to move along the width direction of the foil.

[0011] In one embodiment of the slurry edge scraping device of the present invention, a vacuum adsorption component is provided below the scraping and suction component for supporting and adsorbing the foil.

[0012] In one embodiment of the slurry edge scraping device of the present invention, it further comprises a diluent tank for injecting diluent into the vacuum chamber so that the scraped slurry is diluted and then extracted together by the negative pressure device.

[0013] In one embodiment of the slurry edge scraping device of the present invention, it further comprises a flow regulating valve for regulating the flow of the diluent.

[0014] In one embodiment of the slurry edge scraping device of the present invention, the scraping and suction assembly further comprises a scraping and suction seat, the vacuum chamber is disposed in the scraping and suction seat, and the scraper is mounted in the vacuum chamber; The scraper-suction seat is provided with a liquid inlet and a suction port, one end of the liquid inlet is connected to the vacuum chamber, and the other end is connected to the diluent tank; One end of the suction port is connected to the vacuum chamber, and the other end is connected to the negative pressure device.

[0015] In summary, the slurry edge scraping device of the present invention arranges the scraping and suction components above the foil, so as to scrape and extract the slurry with uneven thickness at the edge of the foil during the foil conveying process, thereby improving the coating uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural diagram of an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 Structural diagram of the scraper and suction assembly;

[0018] Figure 3 yes Figure 1 Exploded view of the mid-angle adjustment assembly;

[0019] Figure 4 yes Figure 1 Structural diagram of the vacuum adsorption component;

[0020] Figure 5 yes Figure 1 Structural diagram from another angle;

[0021] Figure 6 It is a schematic diagram of two coating effects;

[0022] In the figure: F, foil; S, slurry; 100, support plate; 110, main horizontal plate; 120, lifting plate; 130, transverse plate; 131, mounting hole; 140, scraper and suction assembly mounting plate; 150, slide rail; 160, liquid tank mounting plate; 200, conveyor roller; 300, scraper and suction assembly; 310, scraper and suction seat; 320, scraper; 330, vacuum chamber; 340, liquid inlet; 350, suction port; 400, angle adjustment assembly; 410, fixing plate; 411, threaded hole; 412, angle ruler; 413, arc groove; 414, roller; 420, movable plate; 421, arc hole; 422, angle pointer; 423, step surface; 430, support block; 431, top screw; 500, first driving member; 600, second driving member; 610, sensor; 620, sensor bracket; 700, position adjustment assembly; 710, transverse adjustment plate; 720, adjustment bolt; 730, screw mounting seat; 800, vacuum adsorption assembly; 810, adsorption assembly mounting plate; 820, adsorption plate; 821, adsorption hole; 830, adsorption box; 840, sealing gasket; 850, pad; 860, exhaust port; 870, pressure gauge interface; 880, lock; 890, lock seat; 900, dilution liquid tank; 910, flow regulating valve. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0024] The slurry edge scraping device disclosed in the embodiment of the present invention can remove the uneven coating on the slurry edge during the foil conveying process, thereby achieving high-precision edge thickness control.

[0025] like Figure 1 、 Figure 2As shown, the slurry edge scraping device includes a pair of support plates 100, with a plurality of conveyor rollers 200 rotatably disposed between the pair of support plates 100. The conveyor rollers 200 serve as a conveying mechanism to convey the foil F in a set direction, whereupon the foil F is coated with the slurry S. Above the conveyor rollers 200, at least one scraping assembly 300 is disposed. The scraping assembly 300 includes a scraping seat 310 and a scraper 320, which can be configured as an integrated structure or as a separate assembled structure as in this embodiment. A vacuum chamber 330 is defined within the scraping seat 310, and the scraper 320 is mounted on the scraping seat 310 and extends into the vacuum chamber 330. The scraper 320 is used to scrape the edge of the slurry S along the conveying direction of the foil F. The vacuum chamber 330 is externally connected to a negative pressure device (not shown) to extract the scraped slurry S. The coordinated design of the scraper 320 and the vacuum chamber 330 can scrape away the uneven thickness of the slurry S on the edge of the foil F while utilizing the negative pressure device to instantly extract the waste material, thereby preventing the accumulation of the slurry S or secondary contamination and improving the cleaning efficiency.

[0026] At least one set of scraping and suction assemblies 300 is provided, positioned at the edges of the slurry S where uneven thickness is to be scraped. In this embodiment, two strips of slurry S are coated on a strip of foil F, which is then cut to form two electrode sheets after a single coating. Three sets of scraping and suction assemblies 300 are provided: two sets are positioned at the edges of the foil F to scrape away the edges of the two slurries S that are separated from each other, while one set of scraping and suction assemblies 300 is positioned between the two sets to collectively scrape away the edges of the two slurries S that are close together. The provision of multiple sets of scraping and suction assemblies 300 can improve work efficiency.

[0027] Each support plate 100 is further provided with an angle adjustment assembly 400 . The two angle adjustment assemblies 400 are used to install three groups of scraping and suction assemblies 300 for adjusting the angle between the scraper 320 of the scraping and suction assembly 300 and the foil F to achieve a better scraping and suction effect.

[0028] like Figure 3 As shown, the angle adjustment assembly 400 includes a fixed plate 410 and a movable plate 420, which are hinged by a rotating shaft. The movable plate 420 has an arc-shaped hole 421, and the fixed plate 410 has a threaded hole 411 at a corresponding position. The fastener passes through the arc-shaped hole 421 and is locked to achieve the angle fixation of the movable plate 420.

[0029] Furthermore, an angle ruler 412 is provided on the fixed plate 410, and an angle pointer 422 is provided on the movable plate 420, which can clearly display the adjusted angle.

[0030] Furthermore, support blocks 430 are provided on both sides of the fixed plate 410 along the conveying direction of the foil F. Top screws 431 are provided through the support blocks 430 . The top screws 431 press against both sides of the movable plate 420 to further fix the movable plate 420 .

[0031] Furthermore, the upper surface of the fixed plate 410 is arc-shaped, with an inwardly machined arc-shaped groove 413 formed on the upper surface of the fixed plate 410. Multiple rollers 414 are rotatably connected within the arc-shaped groove 413, with each roller surface extending beyond the upper surface of the fixed plate 410. A stepped surface 423 is formed on the sidewall of the movable plate 420. This stepped surface 423 is arc-shaped and conforms to the upper surface of the fixed plate 410. After the movable plate 420 is hinged to the fixed plate 410, the stepped surface 423 comes into rolling contact with the roller surfaces of the multiple rollers 414. The rolling contact between the fixed plate 410 and the movable plate 420 via the rollers 414 reduces friction and facilitates angle adjustment.

[0032] Reference again Figure 1 As shown, a main transverse plate 110 is provided between the two movable plates 420, and a first driving member 500 and a lifting plate 120 are respectively provided on both sides of the main transverse plate 110. The lifting plate 120 is slidably installed on the main transverse plate 110. The first driving member 500 is preferably a cylinder, and its driving end is connected to the lifting plate 120 to drive the lifting plate 120 to move up and down.

[0033] The lifting plate 120 is provided with a second drive member 600, which is preferably a motor and screw assembly, and its driving direction is along the width of the foil F. The driving end of the second drive member 600 is connected to a transverse plate 130. The three sets of scraper and suction assemblies 300 are each connected to the transverse plate 130 via a scraper and suction assembly mounting plate 140. The front surface of the lifting plate 120 is provided with a slide rail 150 along the width of the foil. Each scraper and suction assembly mounting plate 140 is slidably mounted on the lifting plate 120 via the slide rail 150. The second drive member 600 synchronously drives the three sets of scraper and suction assemblies 300 to move along the width of the foil F via the transverse plate 130.

[0034] The traverse plate 130 is provided with a plurality of mounting holes 131. The scraper and suction assembly mounting plate 140 is mounted on the traverse plate 130 via the position adjustment assembly 700. The position adjustment assembly 700 includes a traverse adjustment plate 710, an adjustment bolt 720, and a screw mounting seat 730. The screw mounting seat 730 is mounted on the traverse plate 130 through the mounting holes 131. The adjustment bolt 720 passes through the screw mounting seat 730 and is connected to the traverse adjustment plate 710. The traverse adjustment plate 710 is connected to the scraper and suction assembly 300 mounting plate 140. The position of the scraper and suction assembly 300 can be adjusted by adjusting the bolt 720.

[0035] A vacuum suction assembly 800 is installed below the scraping and suction assembly 300 and between the two conveyor rollers 200. The upper surface of the vacuum suction assembly 800 is flat and is used to support and absorb the foil F. When the scraper 320 contacts the foil F, it provides support for the foil F, preventing it from shaking and improving the removal of the slurry S. Both ends of the vacuum suction assembly 800 are mounted to the support plate 100 via suction assembly mounting plates 810, and the angle of the vacuum suction assembly 800 can be adjusted through the suction assembly mounting plates 810.

[0036] like Figure 4 As shown, the vacuum adsorption assembly 800 includes a separate adsorption plate 820 and an adsorption box 830. The adsorption box 830 is a box body without an upper top surface. The adsorption plate 820 serves as the upper top surface of the adsorption box 830, and the two form a sealed cavity. The adsorption plate 820 and adsorption box 830 are separately arranged for easy disassembly and cleaning. The adsorption plate 820 can be replaced according to the area to be adsorbed according to different processes. A sealing gasket 840 is provided between the adsorption plate 820 and the adsorption box 830 to prevent air leakage in the sealed cavity.

[0037] The upper surface of the adsorption plate 820 is machined with an opening, and a pad 850 is disposed within the opening. The pad 850 is made of PTFE and can reduce the friction between the adsorption plate 820 and the foil F. The upper surface of the adsorption plate 820 is also machined with multiple adsorption holes 821 for adsorbing the foil F and preventing it from shaking. The lower surface of the adsorption box 830 is provided with an exhaust port 860, which is connected to a negative pressure device to create a negative pressure in the sealed cavity of the vacuum adsorption assembly 800 and adsorb the foil F. The side surface of the adsorption box 830 is also provided with a pressure gauge interface 870 for connecting a pressure gauge to monitor the vacuum pressure in the sealed cavity in real time.

[0038] The adsorption box 830 is provided with a plurality of lock buckles 880, and the adsorption plate 820 is provided with a plurality of lock buckle seats 890. The lock buckles 880 and the lock buckle seats 890 cooperate to fix the adsorption box 830 and the adsorption plate 820, making it convenient to disassemble and fix the adsorption plate 820.

[0039] like Figure 2 As shown, the scraper and suction seat 310 has a vacuum chamber 330 therein, the scraper 320 is installed in the vacuum chamber 330 and extends out of the scraper and suction seat 310 , and the scraper and suction seat 310 is provided with a liquid inlet 340 and a suction port 350 connected to the vacuum chamber 330 .

[0040] like Figure 5As shown, sensors 610 are provided upstream of the scraper and suction assemblies 300 along the incoming direction of the foil F to detect the deviation of the foil F. Based on this deviation, the second drive member 600 drives the three scraper and suction assemblies 300 to move as a whole along the width of the foil F. The sensors 610 are preferably ultrasonic sensors, two of which are provided, one at each edge of the foil F. The sensors 610 are mounted on a sensor bracket 620, which allows for adjustment of their positions.

[0041] A liquid tank mounting plate 160 is also provided between the two movable plates 420, and the diluent tank 900 is installed on the liquid tank mounting plate 160. A plurality of flow regulating valves 910 are also provided on the liquid tank mounting plate 160. In this example, three flow regulating valves 910 are provided, which are respectively connected to the liquid inlets 340 of the three groups of scraping and suction assemblies 300 for adjusting the flow of the diluent.

[0042] One end of the liquid inlet 340 is connected to the vacuum chamber 330, and the other end is connected to the diluent tank 900. One end of the suction port 350 is connected to the vacuum chamber 330, and the other end is connected to the negative pressure device. During the conveyance of the foil F, the scraper contacts the edge of the slurry S, scraping away the slurry S. The diluent flows into the vacuum chamber 330 through the liquid inlet 340, diluting the scraped slurry S and preventing the slurry S from accumulating and clogging the vacuum chamber 330, the liquid inlet 340, and the suction port 350. The diluent and slurry S mixture is then extracted through the suction port 350.

[0043] In summary, in the embodiment of the present invention, while the scraper is scraping the slurry, the diluent is injected through the liquid inlet 340 and the suction port 350 is used to extract the mixture of the diluent and the slurry S, thereby improving the leveling effect of the slurry S.

[0044] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

Claims

1. A slurry edge scraping device, characterized in that: include: A conveying mechanism for conveying a foil material in a conveying direction, wherein the foil material is coated with slurry; At least one scraping and suction assembly is arranged on the side of the foil coated with the slurry, and the scraping and suction assembly includes a scraper and a vacuum chamber. The scraper is used to scrape off part of the slurry along the conveying direction of the foil to form a uniform slurry edge, and the vacuum chamber is used to connect an external negative pressure device to remove the scraped slurry.

2. The slurry edge scraping device according to claim 1, characterized in that: It also includes an angle adjustment component, and the scraping and suction component is installed on the angle adjustment component to adjust the angle of the scraper of the scraping and suction component relative to the foil.

3. The slurry edge scraping device according to claim 2, characterized in that: The angle adjustment components are provided in two groups, one on each side of the foil along the width direction; The angle adjustment assembly includes a fixed plate and a movable plate, wherein the fixed plate is rotatably connected to the movable plate; The movable plate is provided with an arc-shaped hole, the fixed plate is provided with a threaded hole corresponding to the arc-shaped hole, and the fixed plate and the movable plate are fixed by fasteners passing through the arc-shaped hole and the threaded hole.

4. The slurry edge scraping device according to claim 3, characterized in that: The side wall of the movable plate forms a step surface, the upper surface of the fixed plate and the side wall of the movable plate are in a matching arc shape, the upper surface of the fixed plate is rotatably connected to a plurality of rollers, and the step surface of the movable plate is in rolling contact with the plurality of rollers.

5. The slurry edge scraping device according to any one of claims 1 to 4, characterized in that: The utility model further comprises a first driving member for driving the scraping and sucking assembly to approach or move away from the foil.

6. The slurry edge scraping device according to claim 5, characterized in that: It also includes a second driving member and a sensor, which is arranged upstream of the scraping and suction assembly in the foil conveying direction and is used to detect the offset of the foil; the second driving member is connected to the scraping and suction assembly and is used to drive the scraping and suction assembly to move along the width direction of the foil based on the offset.

7. The slurry edge scraping device according to claim 1, characterized in that: The conveying mechanism includes a plurality of conveying rollers arranged along the width direction of the foil material, and a vacuum adsorption component is arranged between two of the conveying rollers for supporting and adsorbing the foil material.

8. The slurry edge scraping device according to claim 1, characterized in that: A diluent tank is also included, which is used to inject diluent into the vacuum chamber.

9. The slurry edge scraping device according to claim 8, characterized in that: It also includes a flow regulating valve for regulating the flow of the diluent injected.

10. The slurry edge scraping device according to claim 8, characterized in that: The scraping and suction assembly further includes a scraping and suction seat, the vacuum chamber is arranged in the scraping and suction seat, and the scraper is installed in the vacuum chamber; The scraper-suction seat is provided with a liquid inlet and a suction port, one end of the liquid inlet is connected to the vacuum chamber, and the other end is connected to the diluent tank; One end of the suction port is connected to the vacuum chamber, and the other end is connected to the negative pressure device.

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