Slurry coating device

Abstract

The utility model provides a slurry coating device, and relates to the technical field of solar cell preparation equipment. The slurry coating device disclosed by the utility model can comprise a transmission assembly, a restoration assembly and at least one slurry coating assembly. The target object is conveyed to the correcting device through the conveying assembly, the target object is corrected through the correcting device, then the corrected target object is conveyed to the roller of the slurry coating assembly, the edge of the target object is coated with slurry at the roller, and then the edge of the target object is etched.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar cell preparation technical field, in particular to a slurry coating device. BACKGROUND

[0002] In the preparation process of the heterojunction solar cell, the passivation layer, the doped layer and the transparent conductive layer are deposited on both sides of the silicon wafer. During the deposition process, the material inevitably deposits on the edge of the silicon wafer, which causes the materials on the upper and lower sides to conduct electricity to each other, resulting in short circuit of the prepared heterojunction solar cell. In order to avoid short circuit of the prepared solar cell, the transparent conductive layer needs to be cut off after being prepared, or the doped layer and the transparent conductive layer need to be cut off. In order to ensure the performance of the solar cell, the cutting needs to be performed along the edge of the silicon wafer. The commonly used equipment for edge cutting is a screen printing machine or a dispensing machine. Whether it is a screen printing machine or a dispensing machine, the slurry has a certain distance from the edge of the silicon wafer, which causes the performance of the solar cell after etching to be not fully utilized. SUMMARY

[0003] One object of the first aspect of the utility model is to provide a slurry coating device to solve the problem that the slurry cannot be coated on the edge of the target object in the prior art.

[0004] In particular, the utility model provides a slurry coating device, which comprises:

[0005] a transmission assembly for conveying the target object to a correction position and a slurry coating position;

[0006] a correction assembly arranged on one side of the target object and controlled to move to the target object at the correction position to correct the target object; and

[0007] at least one slurry coating assembly arranged on the other side of the transmission assembly, each slurry coating assembly comprising a roller with a slurry layer, the slurry layer being in contact with the edge of the target object moved to the slurry coating position after correction to coat the slurry on the edge of the target object and etch the edge of the target object.

[0008] Optionally, the utility model further comprises a first lifting assembly for supporting the transmission assembly and lifting the transmission assembly, the first lifting assembly comprising:

[0009] a first driving mechanism comprising an eccentric shaft;

[0010] a driving rod rotatably connected to the eccentric shaft to move the driving rod when the eccentric shaft rotates;

[0011] A guide rail assembly is arranged between the driving rod and the transmission assembly, so as to drive the transmission assembly to move along the direction in which the guide rail assembly extends when the driving rod moves.

[0012] Optionally, when the target object moves to contact the roller, one side of the edge of the target object contacts the slurry layer.

[0013] Optionally, when the target object contacts the roller, the target object is at a preset angle between a plane in which the target object is located and a preset plane formed by the line formed by the position at which the target object contacts the roller and the axis of the roller, and the preset angle is 30°-60°.

[0014] Optionally, the alignment assembly comprises:

[0015] A second driving mechanism comprising an output end;

[0016] At least one set of two link rod assemblies arranged oppositely, each link rod assembly comprising a link rod and an alignment piece, one end of each link rod being rotatably connected to the output end of the second driving mechanism, and the other end being rotatably connected to the alignment piece, so that when the output end of the second driving mechanism rotates, the two alignment pieces in the same link rod assembly are brought closer to or farther away from each other through the link rod.

[0017] Optionally, the alignment assembly further comprises a sliding groove and a support plate;

[0018] Each alignment piece comprises a connecting plate and an alignment column, the connecting plate being provided with a sliding block matched with the sliding groove; one end of the connecting plate is rotatably connected to the link rod, and the other end is fixedly connected to the alignment column, so that when the link rod pulls the connecting plate, the connecting plate moves along the sliding groove and drives the alignment column to move along the direction in which the sliding groove extends.

[0019] Optionally, a second lifting assembly is further included, the second lifting assembly being used to drive the alignment assembly to move up and down;

[0020] The second lifting assembly comprises:

[0021] A portal frame,

[0022] A third driving mechanism arranged at the portal frame; the third driving mechanism is connected to the alignment assembly, so as to drive the alignment assembly to move up and down.

[0023] Optionally, each of the slurry coating assemblies further comprises a doctor blade, which is arranged on one side of the roller and extends in a direction parallel to the axis of the roller, and the doctor blade is arranged at a preset distance from the outer surface of the roller so that the slurry outside the roller forms a slurry layer with the same thickness as the preset distance when the roller rotates.

[0024] Optionally, at least one position adjusting assembly is further included, each of the position adjusting assemblies is arranged below one of the slurry coating assemblies to support and adjust the position of the corresponding slurry coating assembly.

[0025] The position adjusting assembly comprises:

[0026] a transverse adjusting member for adjusting the position of the roller in the direction along which the axis of the roller extends;

[0027] a longitudinal adjusting member for adjusting the position of the roller in the direction perpendicular to the axis of the roller;

[0028] an angle adjusting member for adjusting the angle of the roller.

[0029] Optionally, a support assembly is further included, which detachably connects the roller and the doctor blade to the position adjusting assembly; the support assembly comprises a quick release structure to enable quick disassembly between the support assembly and the position adjusting assembly.

[0030] The slurry coating device of the present solution can comprise a conveying assembly, a centering assembly and at least one slurry coating assembly, the target object is conveyed to the centering assembly by the conveying assembly, the target object is centered by the centering assembly, and then the centered target object is conveyed to the roller of the slurry coating assembly, so that the slurry on the roller is coated on the edge of the target object, and the edge of the target object is etched.

[0031] When the target object contacts the roller, one side of the edge of the target object contacts the slurry layer. The etching area is as small as possible, so that only one side of the edge of the target object needs to be coated with slurry, thereby improving the performance of the target product subsequently manufactured.

[0032] The support assembly of the present solution can comprise a quick release structure to enable quick disassembly between the support assembly and the position adjusting assembly, thereby facilitating cleaning.

[0033] The above and other objects, advantages and features of the present solution will become more apparent from the following detailed description of the specific embodiments of the present solution, taken together with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0034] Some specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. The same reference numbers in the drawings indicate the same or similar components or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

[0035] Figure 1 is a schematic perspective view of a slurry coating device according to one specific embodiment of the present application;

[0036] Figure 2 is a side view of a slurry coating device according to one specific embodiment of the present application;

[0037] Figure 3 is a schematic perspective view of a homing assembly and a second lifting assembly according to one specific embodiment of the present application;

[0038] Figure 4 is a bottom view of a homing assembly and a second lifting assembly according to one specific embodiment of the present application;

[0039] Figure 5 is a schematic perspective view of a slurry coating assembly arranged at a position adjusting assembly according to one specific embodiment of the present application;

[0040] Figure 6 is a schematic perspective view of a transmission assembly arranged at a first lifting assembly at one angle according to one specific embodiment of the present application;

[0041] Figure 7 is a schematic perspective view of a transmission assembly arranged at a first lifting assembly at another angle according to one specific embodiment of the present application.

[0042] Legend of reference numbers:

[0043] Slurry coating device - 100; Transmission assembly - 200; Synchronous wheel - 210; Synchronous belt - 220; Driving mechanism - 230;

[0044] Homing assembly - 300; Second driving mechanism - 310; Output end - 311; Linkage assembly - 320; Linkage - 321; Homing piece - 322; Connecting plate - 3221; Homing column - 3222; Slide groove - 3223; Support plate - 330; Slide block - 331;

[0045] Slurry coating assembly - 400; Roller - 410; Scraper - 420; Micrometer - 430; Arc-shaped waist hole - 440; Gear assembly - 450; Driving motor - 460; Support assembly 470; Quick release structure 471; Target object - 500;

[0046] Second lifting assembly-600; gantry-610; third driving mechanism-620;

[0047] Position adjusting assembly-700; transverse adjusting member-710; first support plate-711; first adjusting device-712; longitudinal adjusting member-720; second support plate-721; second adjusting device-722; angle adjusting member-730; third support plate-731; third adjusting device-732;

[0048] First lifting assembly-800; first driving mechanism-810; eccentric shaft-811; driving rod-820; guide rail assembly-830. DETAILED DESCRIPTION

[0049] In the description of the present embodiment, it should be understood that the terms "length", "width", "height", "upper", "lower", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0050] As a specific embodiment of the present application, as shown in Figure 1 and Figure 2 The present embodiment provides a slurry coating device 100, which can include a transmission assembly 200, a correction assembly 300 and at least one slurry coating assembly 400. The transmission assembly 200 is used to transport the target object 500 to the correction position and the slurry coating position. The correction assembly 300 is arranged on one side of the target object 500 and is controlled to move to the target object 500 at the correction position, thereby correcting the target object 500. The at least one slurry coating assembly 400 is arranged on the other side of the transmission assembly 200, and each slurry coating assembly 400 can include a roller 410 with a slurry layer, which contacts the edge of the target object 500 moving to the slurry coating position after correction, coats the slurry on the edge of the target object 500, and thereby etches the edge of the target object 500.

[0051] Specifically, the slurry coating device 100 of the embodiment can include a conveying assembly 200, a rectifying assembly 300 and at least one slurry coating assembly 400, the target object 500 is conveyed to a rectifying position by the conveying assembly 200, the target object 500 is rectified by the rectifying assembly, and then the rectified target object 500 is conveyed to a slurry coating position, at this time, the target object 500 contacts the slurry layer outside the roller, so that the slurry at the roller 410 is coated at the edge of the target object 500, and then the edge of the target object 500 is etched.

[0052] Specifically, the target object 500 of the embodiment can be a silicon wafer after film plating. Generally, the silicon wafer can be square or rectangular.

[0053] Specifically, the slurry coating assembly 400 of the embodiment can be provided with one, two or four. The slurry coating assembly 400 of the embodiment is provided with two, and the two slurry coating assemblies 400 are oppositely arranged, the target object 500 is transported between the two rollers 410 when slurry coating is needed, and the two opposite sides of the target object 500 respectively contact one of the rollers 410, so that the two opposite sides are coated with slurry, and then the film of the opposite sides is etched. Of course, if the four edges of the target object 500 need to be coated with slurry, two opposite sides can be coated first, and then the target object 500 is rotated to coat the other opposite side. When the slurry coating assembly 400 is provided with one, the target object can be rotated three times to coat each side of the target object 500. When the slurry coating assembly 400 is provided with four, the target object 500 only needs to contact the four slurry coating assemblies 400 once, and then the four edges of the target object 500 can be coated with slurry.

[0054] Of course, the shape of the roller 410 of the embodiment matches the shape of the side of the target object 500, so that the outer side of the target object 500 can be coated with slurry.

[0055] As a specific embodiment of the utility model, when the target object 500 contacts the roller 410, one side of the edge of the target object 500 contacts the slurry layer. Specifically, the purpose of slurry coating of the embodiment is to etch the edge of the silicon wafer, so only one side of the edge of the target object 500 needs to be coated with slurry, so as to improve the performance of the target product made subsequently.

[0056] As a specific embodiment of the utility model, when the target object 500 contacts the roller 410, the plane where the target object 500 is located is at a far angle of a preset parallel, wherein the preset plane is a plane formed by the axis of the roller 410 and the line formed at the contact position of the target object and the roller, and the preset angle is 30°-60°.

[0057] The target object 500 is generally horizontally placed, in order to make the slurry at the roller 410 only coated on one side of the target object 500, the edge of the target object 500 can not be directly inserted into the ink outside the roller 410 along the radial direction of the roller 410, and the plane on which the target object 500 is located and the plane on which the radial direction of the target object 500 is located at the contact position of the target object 500 and the roller 410 form a preset angle. Specifically, the preset angle of the embodiment can be 30°-60°, for example, can be 30°, 45° or 60°. Preferably, the preset angle of the embodiment is 45°.

[0058] As a specific embodiment of the utility model, as shown in Figure 3 and Figure 4 The alignment assembly 300 of the embodiment can include a second driving mechanism 310 and at least one set of two link assemblies 320 arranged opposite to each other. The second driving mechanism 310 can include an output end 311. Each link assembly 320 can include a link 321 and an alignment piece 322. One end of each link 321 is rotationally connected to the output end 311 of the second driving mechanism 310, and the other end is rotationally connected to the alignment piece 322, so that when the output end 311 of the second driving mechanism 310 rotates, the two alignment pieces 322 in the same link assembly 320 are brought closer to or farther away from each other through the link 321.

[0059] Specifically, the alignment assembly 300 of the embodiment can include a second driving mechanism 310 and at least one set of two link assemblies 320 arranged opposite to each other. The second driving mechanism 310 drives the link assemblies 320, and the link assemblies 320 correct the two opposite side edges of the target object 500, so that the target object 500 can be matched with the position of the roller 410.

[0060] Specifically, the alignment assembly 300 of the embodiment can include a link 321 and an alignment piece 322. The link 321 moves under the drive of the second driving mechanism 310, and in turn drives the alignment piece 322 to move. In the alignment assembly 300 of the embodiment, four links 321 and four alignment pieces 322 can be arranged opposite to each other at the output end 311 of the second driving mechanism 310. When the two opposite links 321 move under the drive of the second driving mechanism 310, the corresponding two opposite alignment pieces 322 move away from or close to each other, and in turn correct the corresponding opposite side edges of the target object 500. The four links 321 and the four alignment pieces 322 can correct the four edges of the target object 500.

[0061] As a specific embodiment of the present application, the alignment assembly 300 of the present embodiment can further include a support plate 330 provided with a sliding block 331. Each alignment piece 322 can include a connecting plate 3221 and an alignment column 3222, and the connecting plate 3221 is provided with a sliding groove 3223 matched with the sliding block 331. One end of the connecting plate 3221 is rotationally connected with the connecting rod 321, and the other end is fixedly connected with the alignment column 3222, so that when the connecting rod 321 pulls the connecting plate 3221, the connecting plate 3221 moves along the sliding groove 331, and the alignment column 3222 moves along the direction in which the sliding groove 331 extends.

[0062] Specifically, the support plate 330 of the present embodiment can support the connecting plate 3221 and the alignment column 3222, each alignment piece 322 can include two alignment columns 3222 arranged side by side, the alignment columns 3222 are vertically arranged and abut against the edge of the target object 500. The sliding block 331 on the support plate 330 and the sliding groove 3223 at the connecting plate 3221 match with each other, the connecting rod 321 is rotationally connected with the connecting plate 3221, and when the connecting rod 321 moves under the driving of the second driving mechanism 310, the connecting plate 3221 and the alignment column 3222 reciprocate along the direction of the sliding groove 3223. The sliding grooves 3223 at the two opposite support plates 330 are parallel to each other, and the alignment columns 3222 can move close to each other and move away from each other, thereby aligning the target object 500.

[0063] As a specific embodiment of the present application, as shown in Figures 1-3 The slurry coating device 100 of the present embodiment can further include a second lifting assembly 600. The second lifting assembly 600 is used to drive the alignment assembly 300 to move up and down. The second lifting assembly 600 can include a gantry 610 and a third driving mechanism 620. The third driving mechanism 620 is arranged at the gantry 610. The third driving mechanism 620 is connected with the alignment assembly 300 to move up and down under the driving of the third driving mechanism 620.

[0064] Specifically, the second lifting assembly 600 of the present embodiment can include a third driving mechanism 620, which drives the alignment assembly 300 to move up and down, so that when the target object 500 is transported to below the alignment assembly 300 by the conveying assembly 200, the second driving mechanism drives the alignment assembly 300 to move downward to the target object 500 and aligns the target object 500, and then drives the alignment assembly 300 to move upward after the alignment is completed, thereby waiting for the next alignment of the target object 500.

[0065] As a specific embodiment of the present application, as shown in Figure 5As shown, each slurry coating assembly 400 of the embodiment can also include a scraper 420, which is arranged on one side of the roller 410 and extends in parallel with the axis of the roller 410, and the blade of the scraper 420 is at a preset distance from the outer surface of the roller 410, so that the slurry outside the roller 410 forms a slurry with the same thickness as the preset distance when the roller 410 rotates.

[0066] Specifically, the slurry coating assembly 400 of the embodiment can also include a scraper 420, which is parallel to the axis of the roller 410, and the two side edges of the scraper 420 can be provided with a micrometer 430 for adjusting the distance between the scraper 420 and the roller 410. In addition, the two sides of the scraper 420 of the embodiment can also be provided with an arc-shaped waist hole 440, which can adjust the angle of the scraper 420 so that the scraper 420 is as parallel as possible to the axis of the roller 410.

[0067] Specifically, one end of the roller 410 of the embodiment is provided with a gear assembly 450, which is driven to rotate by a driving motor 460, thereby driving the roller 410 to rotate. When it is necessary to coat the slurry on the roller 410, some slurry can be randomly coated on the outer periphery of the roller 410, and then the driving motor 460 is used to drive the gear assembly 450 to move, thereby driving the roller 410 to move. When the roller 410 moves, the slurry moves with the roller 410, and when it moves to the scraper 420, the scraper 420 will scrape the slurry flat, and the thickness of the slurry on the roller 410 is the same as the distance between the scraper 420 and the outer side of the roller 410.

[0068] As a specific embodiment of the utility model, Figure 5 As shown, the slurry coating device 100 of the embodiment can also include at least one position adjusting assembly 700, each of which is arranged below one of the slurry coating assemblies 400 for supporting and adjusting the position of the corresponding slurry coating assembly 400. The position adjusting assembly 700 can include a transverse adjusting member 710, a longitudinal adjusting member 720, and an angle adjusting member 730. The transverse adjusting member 710 is used to adjust the position of the roller 410 in the direction of the axis thereof. The longitudinal adjusting member 720 is used to adjust the position of the roller 410 in the direction along the vertical axis. The angle adjusting member 730 is used to adjust the angle of the roller 410.

[0069] Specifically, each of the adjusting members of the present embodiment comprises a corresponding support plate and an adjusting device arranged on the support plate. For example, the lateral adjusting member 710 comprises a first support plate 711 and a first adjusting device 712, and the longitudinal adjusting member 720 comprises a second support plate 721 and a second adjusting device 722. The angle adjusting member 730 can comprise a third support plate 731 and a third adjusting device 732. Specifically, the adjusting device can be an adjusting bolt. The position and angle of the roller 410 are adjusted by the mutual abutment between the adjusting bolt and the support plate.

[0070] Specifically, the lateral adjusting member 710, the longitudinal adjusting member 720, and the angle adjusting member 730 are arranged one above the other in sequence, but the sequence is not limited.

[0071] As a specific embodiment of the present application, the slurry coating assembly 400 of the present embodiment can further comprise a support assembly 470. The support assembly 470 detachably connects the roller 410 and the doctor blade 420 to the position adjusting assembly 700. The support assembly 470 can comprise a quick release structure 471, so that the support assembly 800 and the position adjusting assembly 700 can be quickly detached.

[0072] The quick release structure 471 of the present embodiment can quickly detach the roller 410 from the position adjusting assembly 700, thereby facilitating cleaning.

[0073] As a specific embodiment of the present application, as shown in Figure 6 and Figure 7 The slurry coating device 100 of the present embodiment can further comprise a first lifting assembly 800 for supporting the transmission assembly 200 and driving the transmission assembly 200 to lift. The first lifting assembly 800 can comprise a first driving mechanism 810, a driving rod 820, and a guide rail assembly 830. The first driving mechanism 810 can comprise an eccentric shaft 811. The driving rod 820 is rotatably connected to the eccentric shaft 811 to drive the driving rod 820 to move when the eccentric shaft 811 rotates. The guide rail assembly 830 is arranged between the driving rod 820 and the transmission assembly 200 to drive the transmission assembly 200 to move along the direction in which the guide rail assembly 830 extends when the driving rod 820 moves.

[0074] Specifically, the first lifting assembly 800 of the present embodiment can drive the transmission assembly 200 to lift, thereby driving the target object 500 placed on the transmission assembly 200 to lift. After the target object 500 is aligned, the first lifting assembly 800 can drive the target object 500 to approach the roller 410 and finally contact the roller 410, thereby enabling the slurry on the roller 410 to be coated on the edge of the target object 500.

[0075] Specifically, the transmission assembly 200 of the present embodiment can include a synchronous wheel 210 rotating under the driving of a driving mechanism 230, and a synchronous belt 220 sleeved on the synchronous wheel 210 and moving with the synchronous wheel 210. When the target object 500 reaches the synchronous belt 220 from one side, the synchronous belt 220 moves to drive the target object 500 to move, and then reaches the middle position of the synchronous belt 220.

[0076] When the target object 500 reaches the middle position, the second lifting assembly 600 drives the homing assembly 300 to move to the position of the target object 500, and the target object 500 is homed by the homing assembly 300. After completion, the second lifting assembly 600 moves away from the target object 500. The third driving mechanism 620 drives the synchronous wheel 210 and the synchronous belt 220 to move together, drives the target object 500 to reach the position of the slurry coating assembly 400, and makes the target object 500 contact with the slurry on the roller 410, so that the edge of the target object 500 is coated with the slurry. After completion, the target object 500 is driven to move away from the slurry coating assembly 400.

[0077] At this point, those skilled in the art should recognize that, although the present application has been shown and described in detail in the above embodiments, many other variations or modifications can be determined or deduced directly according to the disclosure of the present application without departing from the spirit and scope of the present application, which conform to the principles of the present application. Therefore, the scope of the present application should be understood and recognized as covering all these other variations or modifications.

Claims

1. A slurry coating apparatus characterized by, The application relates to a slurry coating device for a target object, comprising: a transmission assembly for conveying the target object to a homing position and a slurry coating position; a homing assembly arranged on one side of the target object and capable of moving to the target object at the homing position to homing the target object; and at least one slurry coating assembly arranged on the side of the transmission assembly, each of the slurry coating assemblies comprising a roller with a slurry layer, the slurry layer being in contact with the edge of the target object moving to the slurry coating position after homing to coat the edge of the target object and etch the edge of the target object.

2. The slurry coating device according to claim 1, further comprising a first lifting assembly for supporting and lifting the transmission assembly, the first lifting assembly comprising: a first driving mechanism comprising an eccentric shaft; a driving rod rotatably connected to the eccentric shaft to move the driving rod when the eccentric shaft rotates; a guide rail assembly arranged between the driving rod and the transmission assembly to move the transmission assembly along the direction in which the guide rail assembly extends when the driving rod moves.

3. The slurry coating device according to claim 1, wherein the edge of the target object is in contact with the slurry layer on one side when the target object moves to contact the roller.

4. The slurry coating device according to claim 1, wherein the plane on which the target object is arranged is at a preset angle to a preset plane when the target object contacts the roller, the preset plane being the plane formed by the contact position of the target object and the roller and the axis of the roller, and the preset angle being 30-60 degrees.

5. The slurry coating device according to claim 1, wherein the homing assembly comprises: a second driving mechanism comprising an output end; at least one set of two oppositely arranged connecting rod assemblies, each of the connecting rod assemblies comprising a connecting rod and a homing member, one end of each of the connecting rods being rotatably connected to the output end of the second driving mechanism, and the other end being rotatably connected to the homing member, so that the two oppositely arranged homing members are moved closer to or farther away from each other through the connecting rod when the output end of the second driving mechanism rotates.

6. The slurry coating device according to claim 5, wherein the homing assembly further comprises a sliding block and a supporting plate; each of the homing members comprises a connecting plate and a homing column, the connecting plate being provided with a sliding groove matched with the sliding block; one end of the connecting plate is rotatably connected to the connecting rod, and the other end is fixedly connected to the homing column, so that the connecting plate moves along the sliding groove and the homing column moves along the direction in which the sliding groove extends when the connecting rod pulls the connecting plate.

7. The slurry coating device according to claim 5, further comprising a second lifting assembly for moving the homing assembly up and down; the second lifting assembly comprising: a gantry. ​ ​ ​ ​ ​ ​ ​ A third driving mechanism is arranged at the portal frame; the third driving mechanism is connected with the alignment assembly to move up and down under the drive of the third driving mechanism.

8. The slurry coating device according to claim 1, wherein, Each of the slurry coating assemblies further comprises a doctor blade arranged at one side of the roller, the doctor blade extends in parallel with the axis of the roller, and the cutting edge of the doctor blade is at a preset distance from the outer surface of the roller to form a slurry layer with the same thickness as the preset distance on the outer surface of the roller when the roller rotates.

9. The slurry coating device according to claim 8, wherein, At least one position adjusting assembly is further arranged below each of the slurry coating assemblies to support and adjust the position of the corresponding slurry coating assembly; The position adjusting assembly comprises: a lateral adjusting member to adjust the position of the roller in the direction along which the axis of the roller extends; a longitudinal adjusting member to adjust the position of the roller in the direction perpendicular to the axis of the roller; an angle adjusting member to adjust the angle of the roller.

10. The slurry coating device according to claim 9, wherein, A support assembly is further arranged to detachably connect the roller and the doctor blade to the position adjusting assembly; the support assembly comprises a quick release structure to enable quick disassembly between the support assembly and the position adjusting assembly.

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