Scraping device and method

Abstract

The invention discloses a scraping device which is used for removing coating slurry on a pole piece. The scraping device comprises at least one scraping assembly and a first driving part. The scraping assembly is arranged above the pole piece and comprises a scraper, and the scraper is driven to move up and down to make contact with the pole piece. The first driving part is connected with the scraping assembly and used for driving the scraping assembly to move in the pole piece conveying direction. The invention further discloses a scraping method. In the pole piece conveying process, the coating slurry is locally removed at the speed lower than the pole piece conveying speed, the removed coating slurry is adsorbed at the same speed as the pole piece after the pole piece slurry is removed, and the removal efficiency and quality of the coating slurry are improved.

Description

Technical Field

[0001] The present invention belongs to the field of lithium battery automation equipment, and particularly relates to a scraping device and method. Background Art

[0002] During the manufacturing process of lithium battery electrodes, the coating slurry on the surface of the current collector needs to be locally removed in the tab welding area to ensure reliable welding between the tab and the current collector.

[0003] Currently, traditional scraping methods mainly involve pausing the movement of the electrode during its conveyance and using a scraper to remove the coating slurry in the designated area. However, this intermittent operation not only reduces production efficiency, but also may increase mechanical wear due to frequent starting and stopping of the equipment, affecting the continuity and stability of the production line.

[0004] Therefore, there is an urgent need to develop a new type of scraping device and method that can efficiently and accurately remove the coating slurry while the electrode is running continuously, so as to improve production efficiency and ensure the quality of tab welding. Summary of the Invention

[0005] The purpose of the present invention is to provide a scraping device and method that can improve work efficiency.

[0006] To achieve the above purpose, the scraping device of the present invention includes: At least one scraping assembly disposed above the electrode, the scraping assembly including a scraper for being driven to move up and down to contact the electrode; A first driving member connected to the scraping assembly for driving the scraping assembly to move along the electrode conveyance direction.

[0007] In an embodiment of the scraping device of the present invention, it further includes a second driving member, the driving direction of the second driving member being perpendicular to the electrode for driving the scraping assembly to move up and down.

[0008] In an embodiment of the scraping device of the present invention, it further includes a third driving member, the driving direction of the third driving member being the same as the width direction of the electrode for driving the scraping assembly to move along the width direction of the electrode.

[0009] In an embodiment of the scraping device of the present invention, the scraper forms a set angle with the electrode, and the range of the set angle is 70° - 90°.

[0010] In an embodiment of the scraping device of the present invention, the scraping assembly includes a third mounting plate, a fourth driving member, and a scraper seat. The fourth driving member is mounted on the third mounting plate, the driving end of the fourth driving member is connected to the scraper seat, and the scraper is mounted on the scraper seat.

[0011] In an embodiment of the scraping device of the present invention, the fourth driving member is connected to the scraper seat through a cam assembly. The cam assembly includes a rotating wheel, a cam, and a connecting plate. The fourth driving member is a rotating motor. The rotating wheel is connected to the driving end of the fourth driving member. The connecting plate is slidably mounted on the third mounting plate. The scraper seat and the cam are respectively mounted at both ends of the connecting plate. A cam groove cooperating with the cam is provided on the outer peripheral surface of the rotating wheel.

[0012] In an embodiment of the scraping device of the present invention, the connecting plate is connected to the scraper seat through at least one rotary slide table to adjust the installation angle of the scraper seat.

[0013] In an embodiment of the scraping assembly of the present invention, the scraping assembly further includes a scraper seat. The scraper seat has a vacuum space with an opening facing downward inside. The scraper is installed in the vacuum space and extends out of the scraper seat through the opening. The scraper seat is provided with an injection port and a suction port communicating with the vacuum space. The injection port is used to inject a diluent into the vacuum space, and the suction port is used to discharge the mixture of the diluent and the coating slurry.

[0014] The present invention also discloses a scraping method, including the following steps: Driving at least one scraping assembly to move along the conveying direction of the pole piece at a first speed; When the scraping assembly moves at the first speed, driving the scraper of the scraping assembly to contact the coating slurry on the pole piece; Driving the scraping assembly to move along the conveying direction of the pole piece at a second speed; and when the scraping assembly moves at the second speed, removing the coating slurry; Wherein, the first speed is the same as the moving speed of the pole piece, and the second speed is less than the first speed.

[0015] In an embodiment of the scraping method of the present invention, it further includes that when the coating slurry is removed, driving the scraper assembly to continue to move at the first moving speed for a predetermined time.

[0016] In summary, the scraping device and method of the present invention locally remove the coating slurry at a speed lower than the pole piece conveying speed during the pole piece conveying process, and adsorb the removed coating slurry at the same speed as the pole piece after removing the pole piece slurry, improving the coating slurry removal efficiency and quality. Description of the Drawings

[0017] Figure 1 is the structural diagram of the embodiment of the present invention;

[0018] Figure 2 is Figure 1 Another angle structural diagram;

[0019] Figure 3 isFigure 1 Structural diagram of the middle scraping component;

[0020] Figure 4 is Figure 1 Cross-sectional view of the middle scraper seat;

[0021] Figure 5 is Figure 1 Right view of;

[0022] In the figure: 100, mounting frame; 110, main body support; 111, scale; 120, adjusting vertical plate; 121, pointer; 130, flat support; 200, first driving member; 300, first mounting plate; 310, second mounting plate; 320, adjusting assembly; 321, transverse movement adjusting plate; 322, adjusting bolt; 323, screw mounting seat; 330, transverse movement plate; 340, first dust collection box; 400, scraping component; 410, scraper; 420, third mounting plate; 421, pressing spring plate; 430, fourth driving member; 440, scraper seat; 441, injection port; 442, suction port; 443, vacuum space; 450, manual sliding table; 460, cam assembly; 461, rotating wheel; 4611, cam groove; 462, cam; 463, connecting plate; 464, second dust collection box; 465, third dust collection box; 470, distance sensor; 471, calibration block; 480, buffer spring; 490, rotating sliding table; 491, first rotating sliding table; 492, second rotating sliding table; 493, sliding table mounting plate; 494, adjusting seat; 500, second driving member; 600, third driving member; 610, deviation correction sensor; 700, diluent storage tank. Specific embodiments

[0023] The following further describes the present invention in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the examples given are not intended to limit the present invention.

[0024] The scraping device and method disclosed in the embodiments of the present invention can remove the coating slurry during the process of transporting the electrode sheet, without stopping the transport of the electrode sheet, improving the efficiency of removing the coating slurry. And after removing the coating slurry, the scraping component can follow the electrode sheet and move synchronously for a period of time, increasing the suction time of the scraping component and improving the quality of removing the coating slurry. Such as Figure 1 , Figure 2As shown in the figure, an embodiment of the present invention discloses a scraping device, which includes a mounting frame 100, a first driving member 200, a first mounting plate 300, and at least one scraping assembly 400. The mounting frame 100 includes a main body support 110, an adjusting vertical plate 120, and a planar support 130. The planar support 130 is installed on the adjusting vertical plate 120, and the adjusting vertical plate 120 is rotatably installed on the main body support 110. The levelness of the planar support 130 can be adjusted by the rotational installation of the adjusting vertical plate 120 and the main body support 110. There are two mounting frames 100, which are arranged on both sides of the pole piece. The first driving members 200 are also provided in two, and are respectively installed on the upper surface of the corresponding planar support 130. The angle between the first driving member 200 and the horizontal plane can be adjusted through the mounting frame 100, so that the driving direction of the first driving member 200 is parallel to the pole piece conveying direction. A scale 111 is provided on the main body support 110, and a pointer 121 is provided on the adjusting vertical plate 120, which is convenient for adjusting the rotation angle of the adjusting vertical plate 120.

[0025] The first driving member 200 is preferably a motor screw rod assembly. The first mounting plate 300 is arranged above the pole piece and is connected to the driving end of the first driving member 200. The scraping assembly 400 is installed on the first mounting plate 300. The scraping assembly 400 includes a scraper 410, and the scraper 410 is driven to move up and down to contact the pole piece to remove the coating slurry on the pole piece.

[0026] In other embodiments, the first driving member 200 can also be provided as one, and its driving end is connected to the first mounting plate 300. The two ends of the first mounting plate 300 are respectively slidably connected to the planar support 130 through slide rails.

[0027] The first driving member 200 drives at least one scraping assembly 400 to move to remove the coating slurry on the pole piece. When the first driving member 200 drives at least one scraping assembly 400 to move synchronously with the pole piece conveying speed, the scraper 410 is driven to move downward to contact the pole piece. Keeping the same speed during the downward movement can ensure the flatness of the scraping opening. After the scraper 410 contacts the pole piece, the first driving member 200 drives at least one scraping assembly 400 to move eastward at a speed less than the pole piece conveying speed, forming a speed difference with the pole piece conveying speed to remove the coating slurry and form a tab welding area.

[0028] Furthermore, the scraping device further includes a second driving member 500. The second driving member 500 is installed on the first mounting plate 300, preferably a cylinder, and its driving direction is perpendicular to the pole piece, driving the scraping assembly 400 to move up and down.

[0029] Further, the scraping device further includes a second mounting plate 310 connected to the driving end of the second driving member 500. A third driving member 600 is provided on the second mounting plate 310. The third driving member 600 is preferably a motor screw assembly, and its driving direction is the same as the width direction of the pole piece. The driving end of the third driving member 600 is connected to the scraping assembly 400. When it is detected that the pole piece is offset, the third driving member 600 drives the scraping assembly 400 to move synchronously along the width direction of the pole piece.

[0030] Two deviation correction sensors 610 are provided above the edge of the pole piece and upstream of the scraping assembly 400 for detecting the deviation of the pole piece.

[0031] The scraping assembly 400 is mounted on a transverse movement plate 330 through an adjustment assembly 320. The transverse movement plate 330 is connected to the driving end of the third driving member 600. When the deviation correction sensor 610 detects that the pole piece is offset, the third driving member 600 drives the scraping assembly 400 to move integrally and synchronously through the transverse movement plate 330. In this embodiment, the number of scraping assemblies 400 is set to six and is arranged on the transverse movement plate 330 at equal intervals. In other embodiments, the number and spacing of the scraping assemblies 400 can also be adjusted according to the pole piece production situation.

[0032] The adjustment assembly 320 includes a transverse movement adjustment plate 321, an adjustment bolt 322, and a screw mounting seat 323. A plurality of mounting holes are provided on the transverse movement plate 330. The screw mounting seat 323 is mounted on the transverse movement plate 330 through the mounting holes. The adjustment bolt 322 passes through the screw mounting seat 323 and is connected to the transverse movement adjustment plate 321. The transverse movement adjustment plate 321 is connected to the scraping assembly 400. The position of the scraping assembly 400 can be adjusted by the adjustment bolt 322.

[0033] Further, as Figure 3As shown, the scraping component 400 includes a third mounting plate 420, a fourth driving member 430, and a scraper seat 440. The scraper 410 is mounted on the scraper seat 440. The third mounting plate 420 is connected to the second mounting plate 310 through a slide rail, and the top of the third mounting plate 420 is connected to the transverse movement adjustment plate 321. The fourth driving member 430 is slidably mounted on the third mounting plate 420 through a manual slide table 450 for adjusting the distance between the fourth driving member 430 and the pole piece to ensure that multiple scraping components 400 are at the same height when assembled. The fourth driving member 430 is connected to the scraper seat 440 through a cam assembly 460. The cam assembly 460 includes a rotating wheel 461, a cam 462, and a connecting plate 463. The connecting plate 463 is slidably mounted on the third mounting plate 420 through a slide rail, and the scraper seat 440 and the cam 462 are respectively mounted at both ends of the connecting plate 463. The fourth driving member 430 is a rotating motor, and a cam groove 4611 matching with the cam 462 is provided on the outer peripheral surface of the rotating wheel 461. The cooperation between the rotating wheel 461 and the cam groove 4611 can make the scraper 410 periodically descend and ascend, which is convenient for control.

[0034] A distance sensor 470 is further provided on the fourth driving member 430, and a calibration block 471 matching with the distance sensor 470 is provided on the connecting plate 463. The displacement of the cam 462 pressing down is fed back to the fourth driving member 430 through the distance sensor 470 to ensure that the scraper 410 accurately contacts the pole piece and lifts from the pole piece.

[0035] A compression spring plate 421 is provided at the lower end of the third mounting plate 420, and a buffer spring 480 is provided between the compression spring plate 421 and the connecting plate 463 to make the scraper 410 contact the pole piece with a suitable downward pressure to avoid damaging the pole piece.

[0036] Further, the connecting plate 463 is connected to the scraper seat 440 through at least one rotating slide table 490 to adjust the mounting angle of the scraper seat 440. In this embodiment, two rotating slide tables 490 are provided, namely a first rotating slide table 491 and a second rotating slide table 492. The base of the first rotating slide table 491 is mounted on the connecting plate 463 through a slide table mounting plate 493. The rotating end of the first rotating slide table 491 is connected to an adjusting seat 494, and the rotating shaft of the first rotating slide table 491 is parallel to the width direction of the pole piece. The base of the second rotating slide table 492 is connected to the first rotating slide table 491 through an adjusting seat 494, and the rotating end of the second rotating slide table 492 is connected to the scraper seat 440. The rotating shaft of the second rotating slide table 492 is parallel to the pole piece conveying direction. The angle between the scraper seat 440 and the pole piece is adjusted through the first rotating slide table 491, and then the angle between the scraper 410 and the pole piece is adjusted. The parallelism between the end of the scraper seat 440 and the pole piece is adjusted through the second rotating slide table 492, and then the parallelism between the cutting edge of the scraper 410 and the pole piece is adjusted.

[0037] Further, asFigure 4 As shown in the figure, a vacuum space 443 is provided inside the blade holder 440. The blade 410 is installed in the vacuum space 443 and extends out of the blade holder 440. The blade holder 440 is provided with an injection port 441 and a suction port 442 that communicate with the vacuum space 443. The injection port 441 is connected to the diluent storage tank 700 provided on one side of the mounting frame 100, and the suction port 442 is externally connected to a negative pressure device. During the process of the blade 410 removing the coating slurry, diluent is injected into the vacuum space through the injection port 441 to dilute the scraped coating slurry, preventing the coating slurry from accumulating and blocking the vacuum space, the injection port 441, and the suction port 442; the mixture of the diluent and the coating slurry is sucked out through the suction port 442.

[0038] The blade is installed in the vacuum space and extends out of the blade holder. The blade holder is provided with an injection port and a suction port that communicate with the vacuum space Furthermore, as Figure 5 shown in the figure, the pole piece is conveyed at an angle to the horizontal plane, and the driving direction of the first driving member 200 is adjusted through the mounting frame 100. The blade 410 forms a set angle with the pole piece, and the set angle range is 70° - 90°. The angle between the blade 410 and the pole piece is adjusted through the rotating slide 490. When the blade 410 and the pole piece are in a non-vertical state, the time for forming negative pressure between the blade head and the pole piece can be accelerated, facilitating the adsorption of the removed coating slurry, and at the same time, the edge of the blade head will not hang materials.

[0039] As Figure 1 shown in the figure, a first dust collection box 340 is provided below the first mounting plate 300. As Figure 3 shown in the figure, a second dust collection box 464 is provided below the rotating wheel 461, and a third dust collection box 465 is provided below the connecting plate 463. When each component moves, impurities such as debris may be generated due to mutual friction between the components. The three dust collection boxes are all used for dust collection to prevent contamination of the pole piece.

[0040] Another embodiment of the present invention discloses a scraping method, including the following steps: Step 1: The first driving member 200 drives at least one scraping assembly 400 to move along the pole piece conveying direction at a first speed equal to the pole piece conveying speed, so that the scraping assembly 400 remains relatively stationary with respect to the pole piece to be processed; In this embodiment, before step 1, there are also adjustment steps: (1) adjusting the driving direction of the first driving member 200 through the mounting frame 100; (2) adjusting the distance between multiple scraping assemblies 400 through the adjusting assembly 320; (3) adjusting the distance between the blade 410 and the pole piece through the manual slide 450; (4) adjusting the angle between the blade 410 and the pole piece through the first rotating slide 491; (5) adjusting the parallelism between the edge of the blade 410 and the pole piece through the second rotating slide 492.

[0041] Step 2: With the scraping component 400 and the pole piece in a relatively stationary state, the scraper 410 is driven to move downward to remove the coating slurry on the pole piece; the second driving member 500 drives the scraping component 400 to move downward to make the scraper 410 approach the pole piece. At the same time, the fourth driving member 430 drives the rotating wheel 461 to rotate to make the scraper 410 periodically contact the pole piece. In this way, the contact process between the scraper 410 and the pole piece can be kept stable to ensure the neat edge of the tab welding area.

[0042] In this embodiment, before step 2, it also includes adjusting the vacuum degree in the scraper seat 440 and injecting a diluent into the scraper seat 440. The suction outlet 442 is externally connected to a negative pressure device to suck out the mixture of the diluent and the coating slurry in the vacuum space 443.

[0043] Step 3: The first driving member 200 drives the scraping component 400 to move in the pole piece conveying direction at the same conveying speed as the pole piece for a certain period of time.

[0044] In this embodiment, the scraping component 400 and the pole piece are kept in synchronous motion for a period of time, the contact time between the scraper 410 and the pole piece is extended, the material suction time of the scraping component 400 is increased, and the quality of the coating slurry removal is improved.

[0045] A scraping method disclosed in this embodiment further includes a rectification step: during the operation of the above steps, when the rectification sensor 610 detects that the pole piece is offset, the third driving member 600 drives the scraping component 400 to move along the width direction of the pole piece.

[0046] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A scraping device for removing the coating slurry on the electrode sheet, characterized in that, Including: At least one scraping component, arranged above the pole piece, the scraping component includes a scraper, and the scraper is used to be driven to move up and down to contact the pole piece; A first driving member, connected to the scraping component, and used to drive the scraping component to move along the pole piece conveying direction.

2. The scraping device according to claim 1, characterized in that, It further includes a second driving member, the driving direction of the second driving member is perpendicular to the pole piece, and is used to drive the scraping component to move up and down.

3. The scraping device according to claim 1 or 2, characterized in that, It further includes a third driving member, the driving direction of the third driving member is the same as the width direction of the pole piece, and is used to drive the scraping component to move along the width direction of the pole piece.

4. The scraping device according to claim 1, characterized in that, The scraper forms a set angle with the pole piece, and the range of the set angle is 70°-90°.

5. The scraping device according to claim 1, wherein The scraping component includes a third mounting plate, a fourth driving member, and a scraper seat. The fourth driving member is installed on the third mounting plate, the driving end of the fourth driving member is connected to the scraper seat, and the scraper is installed on the scraper seat.

6. The scraping device according to claim 5, characterized in that, The fourth driving member is connected to the scraper seat through a cam assembly. The cam assembly includes a rotating wheel, a cam and a connecting plate. The fourth driving member is a rotating motor. The rotating wheel is connected to the driving end of the fourth driving member. The connecting plate is slidably installed on the third mounting plate. The scraper seat and the cam are respectively installed at both ends of the connecting plate. The outer peripheral surface of the rotating wheel is provided with a cam groove that cooperates with the cam.

7. The scraping device according to claim 6, characterized in that, The connecting plate is connected to the scraper seat through at least one rotating slide table to adjust the installation angle of the scraper seat.

8. The scraping device according to claim 1, characterized in that, The scraping component further includes a scraper seat. The inside of the scraper seat has a vacuum space with an opening facing downwards. The scraper is installed in the vacuum space and extends out of the scraper seat through the opening. The scraper seat is provided with an injection port and a suction port that communicate with the vacuum space. The injection port is used to inject a diluent into the vacuum space, and the suction port is used to discharge the mixture of the diluent and the coating slurry.

9. A scraping method for removing coating slurry on a pole piece, characterized in that, Including the following steps: Driving at least one scraping component to move along the pole piece conveying direction at a first speed; When the scraping component moves at the first speed, driving the scraper of the scraping component to contact the coating slurry of the pole piece; Driving the scraping component to move along the pole piece conveying direction at a second speed; And when the scraping component moves at the second speed, removing the coating slurry; Wherein, the first speed is the same as the moving speed of the pole piece, and the second speed is less than the first speed.

10. The scraping method according to claim 9, wherein, It further includes that after the coating slurry is removed, driving the scraper assembly to continue moving at the first moving speed for a predetermined time.

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