Roller coating mechanism and coating apparatus

Abstract

The application provides a roller coating mechanism and a coating device. The roller coating mechanism comprises a roller coating device, which comprises a support frame, a roller coating motor and a coating roller. The coating roller is rotationally connected to the support frame, and the roller coating motor is arranged on the support frame and connected to the coating roller. In the case that a sheet material moves along a first direction above the coating roller, the coating roller contacts the sheet material. The axial direction of the coating roller is parallel to a second direction, and the second direction is perpendicular to the first direction. An adjusting device is connected to the support frame, and the adjusting device is used for adjusting the inclination of the support frame to change the inclination of the coating roller. The mechanism for changing the inclination of the coating roller by the adjusting device makes the coating roller not only suitable for roller coating on a coating surface parallel to the horizontal plane, but also suitable for roller coating on a coating surface with inclination or unevenness, and the working mode is more flexible.

Description

[0001] Cross-references to related applications This application claims priority to Chinese Patent Application No. 202510957764.8, filed on July 10, 2025, entitled “Coating Equipment and Control Method”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery cell processing technology, and in particular to a roller coating mechanism and coating equipment. Background Technology

[0003] Currently, perovskite materials have become a hot topic in solar cell research due to their high absorption coefficient, solution processability, and adjustable bandgap. Perovskite solar cells can be prepared using solution methods. The coating process for perovskite solar cells typically involves multiple steps, such as the preparation of the precursor solution, coating, and annealing. Precise control of these steps is crucial to cell performance. In related technologies, perovskite solar cells are coated using roll coating; however, the coating equipment in these technologies suffers from poor flexibility. Utility Model Content

[0004] In view of the above, it is necessary to provide a roller coating mechanism and coating equipment that can improve the uniformity of roller coating.

[0005] The first aspect of this application provides a roller coating mechanism, comprising: a roller coating device including a support frame, a roller coating motor, and a coating roller, wherein the coating roller is rotatably connected to the support frame, and the roller coating motor is disposed on the support frame and connected to the coating roller; when a sheet material moves along a first direction and passes over the coating roller, the coating roller contacts the sheet material; the axial direction of the coating roller is parallel to a second direction, and the second direction is perpendicular to the first direction; an adjustment device connected to the support frame, the adjustment device being used to adjust the inclination of the support frame to change the inclination of the coating roller.

[0006] In some embodiments, the adjustment device includes a plurality of height adjustment members, which are spaced apart along a second direction; the height adjustment members are connected to the support frame and are used to drive the connection to rise or fall.

[0007] In some embodiments, the support frame is provided with a plurality of connecting blocks corresponding to the height adjustment members; the height adjustment members are connected to the corresponding connecting blocks and are used to drive the connecting blocks to rise or fall; the adjustment device also includes a base and a plurality of fixing plates corresponding to the height adjustment members, the plurality of height adjustment members are installed on the base, the fixing plates are fixed to the base, the fixing plates are provided with guide rails, and the connecting blocks are slidably connected to the guide rails in the vertical direction.

[0008] In some embodiments, the height adjustment member is equipped with an elastic element connected to the connecting block and the fixed plate, and the elastic element undergoes elastic deformation as the connecting block and the fixed plate move relative to each other.

[0009] In some embodiments, the height adjustment member is configured with a grating ruler for measuring the amount of displacement by which the height adjustment member drives the connecting block to move.

[0010] In some embodiments, the height adjustment member is configured with a baffle and a plurality of sensors disposed on a fixed plate. The baffle moves synchronously with the connecting block, and the plurality of sensors are distributed at intervals along the vertical direction and pass through the moving path of the baffle. The sensors are used to sense the position of the baffle.

[0011] In some embodiments, the height adjustment element is a voice coil motor.

[0012] In some embodiments, the roller coating apparatus further includes a doctor blade connected to a support frame, with the doctor blade and coating rollers spaced apart.

[0013] In some embodiments, the roller coating apparatus further includes an adjustment component, through which the doctor blade is connected to the support frame, and the adjustment component is used to adjust the distance between the doctor blade and the coating roller.

[0014] In some embodiments, the roller coating apparatus further includes a liquid storage container disposed below the coating roller. The liquid storage container has an inlet and an outlet and is used to store a solution. The lower part of the coating roller is immersed in the liquid storage container and is coated with the solution.

[0015] The second aspect of this application provides a coating apparatus, including a frame, a detection device, and a roller coating mechanism as provided in the first aspect. The detection device and the roller coating mechanism are disposed on the frame, and the detection device is used to detect the flatness of the bottom surface of the sheet material.

[0016] The roller coating mechanism and equipment provided in this application allow for adjustments to the tilt of the support frame before or during the roller coating process. This ensures the coating roller's tilt matches the tilt of the bottom surface of the sheet material, guaranteeing uniform contact area between the coating roller's tangent and the bottom surface of the sheet material, resulting in more uniform coating. Furthermore, this mechanism of adjusting the coating roller's tilt allows it to be used not only on surfaces parallel to a horizontal plane but also on tilted or uneven surfaces, making the operation more flexible. Attached Figure Description

[0017] Figure 1 A schematic diagram of the coating equipment provided in this application.

[0018] Figure 2 A schematic diagram of the coating equipment provided in this application in its working state.

[0019] Figure 3 A schematic diagram showing the conveying direction of the sheet material provided in this application.

[0020] Figure 4 This is a schematic diagram of the structure of the roller coating device, adjusting device, and wiping device provided in this application.

[0021] Figure 5 A perspective view of the roller coating apparatus provided in this application.

[0022] Figure 6 A side view of the roller coating apparatus provided in this application.

[0023] Figure 7 A side view of the adjustment device provided in this application.

[0024] Figure 8 A perspective view of the adjustment device provided in this application.

[0025] Figure 9 This is a schematic diagram showing the state of the testing device provided in this application when testing sheet materials.

[0026] Figure 10 A perspective view of the erasing device provided in this application.

[0027] Figure 11 A schematic diagram showing the state of the sheet material provided in this application passing above the wiping device.

[0028] Figure 12 This is a schematic diagram showing the distribution of sub-regions of the sheet material provided in this application.

[0029] Figure 13 A schematic diagram showing the distribution of detection points for the sheet material provided in this application.

[0030] Figure 14 A comparison diagram of the tilt curve of the sheet material provided in this application and the tilt curve of the coating roller tangent.

[0031] Explanation of main component symbols 100. Coating equipment; 10. Frame; 11. Loading platform; 12. Unloading platform; 20. Detection device; 21. Fixture; 22. Distance measuring component; 221. First measuring component; 222. Second measuring component; 30. Adjustment device; 31. Height adjustment component; 311. First height adjustment component; 312. Second height adjustment component; 314. Adjustment base; 32. Base; 33. Fixing plate; 331. Second bolt; 34. Guide rail; 341. Slider; 35. Elastic component; 36. Grating ruler; 37. Baffle; 38. Sensor; 381. First sensor; 382. Second sensor; 39. Reading head; 40. Roller coating device; 41. Coating roller; 42. Support frame; 421. Support platform; 422. First floating seat; 423. Second floating seat; 424. Connecting block; 425. First bolt; 43. Roller coating motor; 431. Coupling; 44. Doctor blade; 45. Liquid storage container; 451. Liquid inlet; 452. Liquid outlet; 46. Adjusting components; 50. Erasing device; 51. Mounting frame; 52. Erasing motor; 531. Take-up roller; 541. Unwind roller; 542. Erasing roller; 55. Erasing material; 60. Gripping device; 61. Support base; 62. Suction cup assembly; 70. Drive unit; 71. Lateral drive assembly; 72. Vertical drive assembly; 200. Sheet material; 201. Coated surface; 300. Roller coating mechanism. Detailed Implementation

[0032] In the description of the embodiments of this application, when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an element centrally located simultaneously. When an element is considered to be "disposed" on another element, it can be directly disposed on the other element or there may be an element centrally located simultaneously. In this application, unless otherwise expressly specified and limited, the terms "installed," "connected," "attached," "fixed," etc., should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. The directional descriptions in this embodiment, such as "up," "down," "top," "bottom," etc., are all based on the direction of the product in the actual use scenario.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] In related technologies, perovskite solar cell silicon wafers need to undergo a roll coating process. In this process, a coating roller with a solution attached needs to be brought into contact with the side of the silicon wafer that needs to be coated, and the silicon wafer and the coating roller are moved relative to each other along the coating direction (the direction perpendicular to the roller's direction) to roll the solution onto the surface of the silicon wafer.

[0035] For example, the tangent of the coating roller is parallel to the horizontal direction, and the silicon wafer is also parallel to the horizontal direction, allowing the silicon wafer to move and contact the coating roller relative to it in the horizontal direction. However, the silicon wafer itself may have uneven thickness, so even if the silicon wafer is parallel to the horizontal direction, the side of the silicon wafer that needs to be coated may still have an angle with the horizontal plane. Alternatively, even if the silicon wafer itself is not parallel to the horizontal direction, the side of the silicon wafer that needs to be coated will still have an angle with the horizontal plane.

[0036] In this situation, if the silicon wafer is directly moved and contacted with the coating roller in the horizontal direction, there will be a certain deviation angle between the extension direction of the silicon wafer surface and the roll direction of the coating roller. Along the roll direction of the coating roller, the degree of contact between the silicon wafer and different positions on the tangent of the coating roller is not uniform, resulting in uneven coating. Existing roll coating equipment cannot adjust for the above situation, has poor flexibility, and produces poor coating results.

[0037] Therefore, this application provides a roller coating mechanism and coating equipment.

[0038] like Figures 1 to 3 As shown, this application first provides a roller coating mechanism 300, which is applied to a coating equipment 100. The coating equipment 100 is used to roller coat a sheet material 200, which can be a raw material for perovskite solar cells. In the example of this application, the sheet material 200 is a silicon wafer, which is rectangular and has two sides. The side of the sheet material 200 that is actually roller coated is defined as the coating surface 201. In this embodiment, the bottom surface of the sheet material 200 is the coating surface 201.

[0039] Specifically, the coating equipment 100 includes a roller coating mechanism 300, a frame 10, a detection device 20, an wiping device 50, a gripping device 60, a drive device 70, a loading platform 11, and a unloading platform 12. The detection device 20, roller coating mechanism 300, wiping device 50, drive device 70, loading platform 11, and unloading platform 12 are all mounted on the frame 10. The loading platform 11, detection device 20, roller coating mechanism 300, wiping device 50, and unloading platform 12 are sequentially distributed along a first direction (the X direction in the figure). The detection device 20 is used to detect the flatness of the bottom surface of the sheet material 200. The gripping device 60 is used to grip or release the sheet material 200. The drive device 70 is connected to the gripping device 60 and is used to drive the gripping device 60 to move.

[0040] In the actual coating process, the gripping device 60 grips the sheet material 200. Driven by the driving device 70, the gripping device 60 moves the sheet material 200 sequentially along the first direction through the detection device 20, the roller coating mechanism 300, and the wiping device 50. When the sheet material 200 moves along the first direction over the detection device 20, the detection device 20 detects the flatness of the bottom surface of the sheet material 200. When the sheet material 200 moves along the first direction over the roller coating mechanism 300, the roller coating mechanism 300 performs roller coating on the sheet material 200. When the sheet material 200 moves along the first direction over the wiping device 50, the wiping device 50 wipes away any residual liquid from the sheet material 200.

[0041] In this embodiment, the roller coating mechanism 300 includes a roller coating device 40 and an adjusting device 30. The roller coating device 40 is used to roller coat the bottom surface of the sheet material 200 when the sheet material 200 moves over it in a first direction. The adjusting device 30 is used to adjust the inclination of the roller coating device 40.

[0042] Please refer to the following: Figure 4 and Figure 5 Specifically, the roller coating apparatus 40 includes a support frame 42, a roller coating motor 43, a coating roller 41, a doctor blade 44, and a liquid storage container 45. The coating roller 41 is rotatably connected to the support frame 42 and is made of metal or a special composite material, with a precision-machined surface to ensure uniform coating. The roller coating motor 43 is mounted on the support frame 42 and connected to the coating roller 41. When the sheet material 200 moves along a first direction over the coating roller 41, the coating roller 41 contacts the bottom surface of the sheet material 200. The axial direction of the coating roller 41 is parallel to a second direction (the Y direction in the figure), and the second direction is perpendicular to the first direction. An adjusting device 30 is connected to the support frame 42 and is used to adjust the inclination of the support frame 42 to change the inclination of the coating roller 41.

[0043] The liquid storage container 45 is located below the coating roller 41. The liquid storage container 45 contains a liquid storage tank filled with solution. The liquid storage tank has an inlet 451 and an outlet 452. The solution enters the liquid storage tank through the inlet 451 and exits through the outlet 452, achieving solution circulation and replacement. The upper part of the coating roller 41 is exposed outside the support frame 42, while the lower part of the coating roller 41 is immersed in the liquid storage container 45 and adheres to the solution. During the roll coating of the sheet material 200, the roll coating motor 43 drives the coating roller 41 to rotate. The circumference of the coating roller 41 adheres to the solution in the liquid storage container 45. The gripping device 60 grips the sheet material 200 and moves it along a first direction past the upper part of the coating roller 41, so that the bottom surface of the sheet material 200 contacts the coating roller 41 to achieve roll coating.

[0044] Understandably, before or during the roll coating of the sheet material 200, the tilt of the coating roller 41 can be adjusted by adjusting the tilt of the support frame 42 to match the tilt of the bottom surface of the sheet material 200. This ensures the uniformity of the contact area between the coating roller 41 and the bottom surface of the sheet material 200 at different positions along the tangent of the coating roller 41, resulting in more uniform roll coating. Thus, by adjusting the tilt of the coating roller 41 using the adjustment device 30, the coating roller 41 is not only suitable for roll coating of the coating surface 201 parallel to the horizontal plane, but also for roll coating of the coating surface 201 with tilt or unevenness, making its operation more flexible.

[0045] In some embodiments, the support frame 42 includes a support platform 421, a first floating seat 422, and a second floating seat 423, wherein the adjusting device 30 is disposed below the support platform 421. The first floating seat 422 and the second floating seat 423 are respectively located at both ends of the support platform 421 and fixed to the upper surface of the support platform 421. The two ends of the coating roller 41 are rotatably connected to the first floating seat 422 and the second floating seat 423, respectively. The roller coating motor 43 is fixed to the second floating seat 423, and the output shaft of the roller coating motor 43 is connected to the coating roller 41 through a coupling 431. In this way, the roller coating motor 43 can directly drive the coating roller 41 to rotate.

[0046] In some embodiments, the doctor blade 44 is spaced apart from the coating roller 41 and is parallel to the coating roller 41. The height of the doctor blade 44 is lower than the height of the upper surface of the coating roller 41 to prevent the doctor blade 44 from obstructing the passage of the sheet material 200. When the adjusting device 30 adjusts the inclination of the support frame 42, the inclination of the doctor blade 44 and the coating roller 41 changes together, keeping the doctor blade 44 parallel to the coating roller 41.

[0047] When the roller coating motor 43 drives the coating roller 41 to rotate, the coating roller 41 absorbs the solution in the liquid storage container 45 to the periphery as it rotates, while the scraper 44 scrapes off the excess solution from the coating roller 41 to ensure uniform coating thickness.

[0048] In some embodiments, the roller coating apparatus 40 further includes an adjusting component 46. The doctor blade 44 is connected to the support frame 42 via the adjusting component 46, which adjusts the distance between the doctor blade 44 and the coating roller 41. Exemplarily, the adjusting component 46 is a displacement platform, which has a main body, a rotary adjustable operating part, and a slide part that moves back and forth relative to the main body as the operating part is rotated. The main body of the displacement platform is fixed to the support frame 421, and the doctor blade 44 is fixed to the slide part. By rotating the operating part, the user can move the doctor blade 44 toward or away from the coating roller 41, thereby flexibly adjusting the distance between the doctor blade 44 and the coating roller 41, and setting the amount of solution scraped off by the doctor blade 44 to adjust the amount of solution adhering to the coating roller 41.

[0049] Specifically, there are two sets of adjusting components 46, which are respectively located at both ends of the doctor blade 44. The two sets of adjusting components 46 adjust the distance between the two ends of the doctor blade 44 and the two ends of the coating roller 41 to ensure that the doctor blade 44 and the coating roller 41 remain parallel.

[0050] In some embodiments, the adjustment device 30 includes a plurality of height adjustment members 31, which are spaced apart along a second direction. The height adjustment members 31 are connected to the support frame 42 and are used to drive the connection (i.e., the connection between the height adjustment member 31 and the support frame 42) to rise or fall.

[0051] Specifically, the adjustment device 30 also includes a base 32, to which multiple height adjustment components 31 are mounted, and the base 32 is fixed to the frame 10. The support frame 42 is provided with multiple connecting blocks 424 corresponding to the height adjustment components 31, and the connecting blocks 424 are fixed to the bottom of the support platform 421. It can be understood that the connecting blocks 424 are the connection points between the support frame 42 and the height adjustment components 31. The height adjustment component 31 is connected to the corresponding connecting block 424 and is used to drive the connecting block 424 to rise or fall.

[0052] In the example of this application, there are two height adjustment components 31, namely a first height adjustment component 311 and a second height adjustment component 312. The first height adjustment component 311 and the second height adjustment component 312 are respectively disposed at the bottom of both ends of the support frame 42. The first height adjustment component 311 and the second height adjustment component 312 are used to adjust the height of the two connecting blocks 424, thereby changing the height difference between the two ends of the support frame 42 and adjusting the overall tilt of the support frame 42.

[0053] For example, the height adjustment element 31 is a voice coil motor. The voice coil motor includes a moving part and a stator part. The stator part of the voice coil motor is fixed to the base 32, and the moving part of the voice coil motor is fixed to the bottom of the connecting block 424. The voice coil motor is used to reciprocate the moving part relative to the moving part in the vertical direction in response to a control signal, so as to drive the corresponding connecting block 424 to rise or fall, thereby adjusting the inclination of the support frame 42 and the coating roller 41.

[0054] It is understood that voice coil motors have the characteristics of high precision and rapid response, which can reduce the error of tilt adjustment and match the high-speed cycle of the production line to meet the relative process requirements. It is worth noting that the height range that needs to be adjusted at the end of the roller coating device 40 in this embodiment is small (e.g., ±5mm). Therefore, no rotating connection structure such as a ball joint is provided at the connection between the voice coil motor and the support frame 42 or the connection between the voice coil motor and the base 32. The tilt of the roller coating device 40 can still be adjusted by translating the movable end of the voice coil motor without mechanical interference. In other embodiments, if the height range that needs to be adjusted of the roller coating device 40 is large, rotating connection structures such as ball joints can be configured at the connection between the voice coil motor and the support frame 42 or the connection between the voice coil motor and the base 32. This application does not impose any restrictions on this.

[0055] On the other hand, by adjusting the height of both ends of the roller coating device 40 by adjusting the tilt by two height adjustment components 31, the influence of tilt adjustment on the overall height of the roller coating device 40 can be reduced, and the influence of tilt adjustment on the overall height of the coating roller 41 can be reduced. The coating roller 41 is maintained at the preset height by the two height adjustment components 31, which is more conducive to the precise control of the position of the coating roller 41.

[0056] It is understood that the adjustment device 30 in this application adopts a combination of multiple voice coil motors. In other embodiments, the adjustment device 30 can also be an adjustment platform or other mechanism, as long as it can achieve the effect of adjusting the tilt of the roller coating device 40. This application does not impose any restrictions on this.

[0057] Please refer to the following: Figure 6 and Figure 7 In some embodiments, the adjusting device 30 further includes multiple fixing plates 33 corresponding to the height adjusting member 31. The fixing plates 33 are fixed to the base 32, and the fixing plates 33 are provided with guide rails 34. The connecting block 424 is slidably connected to the guide rails 34 in the vertical direction. For example, the guide rails 34 are slidably provided with sliders 341, and the connecting block 424 is fixedly connected to the sliders 341. During the process of the height adjusting member 31 driving the connecting block 424 to rise and fall, the guide rails 34 limit the movement of the connecting block 424 to improve the movement stability of the connecting block 424.

[0058] In some embodiments, the height adjustment member 31 is equipped with an elastic member 35, which is connected to the connecting block 424 and the fixing plate 33. The elastic member 35 undergoes elastic deformation as the connecting block 424 and the fixing plate 33 move relative to each other. For example, the elastic member 35 is a tension spring, the slider 341 is provided with a first bolt 425, and the fixing plate 33 is provided with a second bolt 331. The first bolt 425 and the second bolt 331 are vertically spaced apart, and the two ends of the elastic member 35 are fixed to the first bolt 425 and the second bolt 331, respectively. When the height adjustment member 31 drives the connecting block 424 and the fixing plate 33 to move relative to each other, the elastic member 35 undergoes elastic deformation, absorbing instantaneous kinetic energy and achieving a buffering effect.

[0059] Please refer to the following: Figure 8 In some embodiments, the height adjustment member 31 is equipped with a grating ruler 36, which measures the displacement of the connecting block 424 caused by the height adjustment member 31. Exemplarily, the grating ruler 36 is equipped with a reading head 39. The main scale of the grating ruler 36 is disposed on the fixed plate 33, and the reading head 39 is fixedly connected to the slider 341 so that the reading head 39 moves synchronously with the connecting block 424. When the height adjustment member 31 causes relative displacement between the connecting block 424 and the fixed plate 33, the reading head 39 moves relative to the main scale to measure the actual displacement of the connecting block 424. Thus, by measuring the displacement using the grating ruler 36, it is possible to analyze whether the height adjustment member 31 has driven the connecting block 424 into position, improving the accuracy of tilt adjustment.

[0060] In some embodiments, the height adjustment member 31 is configured with a baffle 37 and a plurality of sensors 38 disposed on the fixed plate 33. The baffle 37 moves synchronously with the connecting block 424, and the plurality of sensors 38 are distributed at intervals along the vertical direction and pass through the moving path of the baffle 37. The sensors 38 are used to sense the position of the baffle 37. Exemplarily, the sensor 38 is a slot-type photoelectric sensor, which has a emitter and a receiver. Under normal, unobstructed conditions, the receiver can receive the light emitted by the emitter. When the optical path between the emitter and the receiver is blocked, the receiver cannot receive the light emitted by the emitter and outputs a switch control signal.

[0061] Multiple sensors 38 are fixed to one side of the fixing plate 33. A baffle 37 is fixedly connected to the slider 341. The end of the baffle 37 near the sensor 38 is bent to form a bent portion. When the connecting block 424 rises and falls, the connecting block 424 drives the reading head 39 and the baffle 37 to rise and fall synchronously. When the baffle 37 rises and falls to the specified height, the baffle 37 moves to the position of the corresponding slotted photoelectric sensor and blocks the emitter and receiver of the slotted photoelectric sensor through the bent portion. At this time, the slotted photoelectric sensor is triggered and outputs the corresponding switch control signal.

[0062] It is understood that multiple sensors 38 can be set at different heights, and the specific position of the baffle 37 can be determined by the switch control signals output by the sensors 38, thus providing a data basis for different control decisions. In the example of this application, there are two sensors 38, namely a first sensor 381 and a second sensor 382. The first sensor 381 is located above the second sensor 382. The height of the first sensor 381 is configured according to the maximum height of the connecting block 424, and the height of the second sensor 382 is configured according to the minimum height of the connecting block 424.

[0063] Thus, as the height adjustment member 31 continues to drive the connecting block 424 upward, when the baffle 37 moves to the position of the first sensor 381, it can be determined that the connecting block 424 has risen to the upper limit of height, and the height adjustment member 31 stops driving the connecting block 424 to continue rising. As the height adjustment member 31 continues to drive the connecting block 424 downward, when the baffle 37 moves to the position of the second sensor 382, ​​it can be determined that the connecting block 424 has fallen to the lower limit of height, and the height adjustment member 31 stops driving the connecting block 424 to continue falling. In other embodiments, the number of sensors 38 can be increased or decreased according to actual needs. For example, a third sensor can be added between the first sensor 381 and the second sensor 382. When the baffle 37 moves to the position of the third sensor, the current position of the baffle 37 is used as the origin for position calibration.

[0064] like Figures 1 to 8 As shown, this application also provides a coating apparatus 100.

[0065] The coating equipment 100 includes a roller coating device 40, a wiping device 50, a frame 10, a detection device 20, a gripping device 60, a drive device 70, a loading platform 11, and a unloading platform 12. The detection device 20, roller coating device 40, wiping device 50, drive device 70, loading platform 11, and unloading platform 12 are all mounted on the frame 10. The loading platform 11, detection device 20, roller coating device 40, wiping device 50, and unloading platform 12 are sequentially distributed along a first direction. The detection device 20 is used to detect the flatness of the bottom surface of the sheet material 200. The gripping device 60 is used to grip or release the sheet material 200. The drive device 70 is connected to the gripping device 60 and is used to drive the gripping device 60 to move.

[0066] In the actual coating process, the gripping device 60 grips the sheet material 200. Driven by the driving device 70, the gripping device 60 moves the sheet material 200 sequentially along the first direction through the detection device 20, the roller coating device 40, and the wiping device 50. When the sheet material 200 moves along the first direction over the detection device 20, the detection device 20 detects the flatness of the bottom surface of the sheet material 200. When the sheet material 200 moves along the first direction over the roller coating device 40, the roller coating device 40 performs roller coating on the sheet material 200. When the sheet material 200 moves along the first direction over the wiping device 50, the roller coating device 40 wipes away any residual liquid from the sheet material 200.

[0067] Please refer to the following: Figure 9 Specifically, the detection device 20 includes a fixed base 21 and multiple distance measuring components 22. The fixed base 21 is disposed on the frame 10, and the multiple distance measuring components 22 are spaced apart along the second direction and fixed to the fixed base 21. The fixed base 21 is provided with a leveling component, which can be used to level the fixed base 21 so that the height of the multiple distance measuring components 22 is consistent.

[0068] As the sheet material 200 moves above the plurality of distance measuring components 22, the distance measuring components 22 project vertically onto the bottom surface of the sheet material 200, forming detection points. The distance measuring components 22 are used to measure the distance between themselves and their corresponding detection points. Specifically, when the gripping device 60 moves the sheet material 200 along a first direction above the plurality of distance measuring components 22, each distance measuring component 22 detects its own distance to its corresponding detection point. The thickness at each detection point can be calculated by measuring the distance at each detection point.

[0069] For example, the distance measurement component 22 employs a laser measurement module. When the sheet material 200 passes directly above the laser measurement module, the laser measurement module instantly obtains the distance from the surface of the laser measurement module to the detection point using triangulation.

[0070] It is understandable that the distance between the measuring component 22 and the detection point can actually reflect the thickness of the sheet material 200. When the side of the sheet material 200 facing away from the coating surface 201 is adsorbed by the gripping device 60, the thickness of the sheet material 200 at the detection point can reflect the flatness of the bottom surface of the sheet material 200.

[0071] Specifically, the drive unit 70 includes a lateral drive assembly 71 and a vertical drive assembly 72. The gripping device 60 is connected to the vertical drive assembly 72, and the vertical drive assembly 72 is connected to the lateral drive assembly 71. The lateral drive assembly 71 drives the gripping device 60 to move along a first direction, and the vertical drive assembly 72 drives the gripping device 60 to move along a vertical direction. For example, the lateral drive assembly 71 can be a gantry-type lateral movement mechanism, and the vertical drive assembly 72 can be a cylinder mechanism.

[0072] It is understood that the loading platform 11, the detection device 20, the roller coating device 40, the wiping device 50, and the unloading platform 12 are distributed at intervals along the first direction. The lateral drive assembly 71 drives the gripping device 60 to move along the first direction, which can enable the gripping device 60 to move directly to the loading platform 11, the detection device 20, the roller coating device 40, the wiping device 50, or the unloading platform 12, thereby improving the movement efficiency.

[0073] The gripping device 60 includes a support base 61 and a suction cup assembly 62. The support base 61 is connected to a vertical drive assembly 72, and the suction cup assembly 62 is connected to the support base 61. The lateral drive assembly 71 can drive the vertical drive assembly 72 to move along a first direction, thereby moving the support base 61 and the suction cup assembly 62 along the first direction. The vertical drive assembly 72 can drive the support base 61 to move vertically, thereby moving the suction cup assembly 62 vertically.

[0074] For example, the suction cup assembly 62 is an alumina ceramic suction cup. The suction cup assembly 62 is connected to a vacuum pumping device and a vacuum breaking device, which change the gripping or releasing state of the suction cup assembly 62 in response to receiving a control command.

[0075] For example, the suction cup assembly 62 is fixed to the bottom surface of the support base 61. When it is necessary to grasp the sheet material 200, the suction cup assembly 62 moves to the top of the sheet material 200 and adheres to it. Then, the suction cup assembly 62 switches to the grasping state, and the suction cup assembly 62 adsorbs the sheet material 200 by negative pressure. When it is necessary to release the sheet material 200, the suction cup assembly 62 switches to the releasing state, the suction cup assembly 62 loses the negative pressure and releases the sheet material 200.

[0076] Specifically, the loading platform 11 is used to place the sheet material 200 to be roller-coated. The coating equipment 100 is connected to the loading equipment via the loading platform 11. The loading equipment places the sheet material 200 to be roller-coated on the loading platform 11 so that the sheet material 200 can enter the subsequent roller coating process. For example, the loading platform 11 is located on the side of the detection device 20 away from the roller coating device 40, and the upper surface of the loading platform 11 is provided with a loading positioning component. When the sheet material 200 is placed on the loading platform 11, the loading platform 11 positions and aligns the sheet material 200 through the loading positioning component so that the sheet material 200 is held in a specified posture for the gripping device 60 to pick up.

[0077] Specifically, the unloading platform 12 is used to place the roll-coated sheet material 200. The coating equipment 100 is connected to the unloading equipment via the unloading platform 12. After the sheet material 200 has completed roll coating, it is placed on the unloading platform 12, and the unloading equipment removes it from the platform for storage or to the next process. For example, the unloading platform 12 is located on the side of the wiping device 50 away from the roll coating device 40, and its upper surface is provided with an unloading positioning component. When the sheet material 200 is placed on the unloading platform 12, the unloading platform 12 positions and aligns it using the unloading positioning component, ensuring the sheet material 200 maintains a specified posture for removal by the unloading equipment.

[0078] Please refer to the following: Figure 10 and Figure 11 Specifically, the wiping device 50 includes a mounting frame 51, a wiping motor 52, a take-up roller 531, an unwind roller 541, a wiping roller 542, and a wiping material 55. The mounting frame 51 is fixed to the machine frame 10. The wiping motor 52 is mounted on the mounting frame 51. The take-up roller 531, unwind roller 541, and wiping roller 542 are all parallel to a second direction, which is perpendicular to the first direction and parallel to the horizontal direction. The take-up roller 531 is rotatably connected to the mounting frame 51 and connected to the wiping motor 52. The unwind roller 541 is rotatably connected to the mounting frame 51. The wiping roller 542 is connected to the mounting frame 51. The wiping material 55 is tensioned and conveyed through the take-up roller 531, the unwind roller 541, and the wiping roller 542. The wiping material 55 is a rewritable, unwindable, dust-free paper. Both ends of the wiping material 55 are wound around the take-up roller 531 and the unwind roller 541, respectively, and the middle portion of the wiping material 55 passes over the upper part of the wiping roller 542. The wiping roller 542 is positioned higher than the take-up roller 531 and the unwind roller 541, and its height is set based on the path traversed by the sheet material 200. When the sheet material 200 passes over the upper part of the wiping roller 542 along a first direction, the wiping material 55 located on the wiping roller 542 wipes away the residual liquid on the bottom surface of the sheet material 200.

[0079] Specifically, the wiping material 55 that has not been used to wipe the sheet material 200 (unused wiping material 55) is wound onto the unwinding roller 541 via a reel. After the single roll of wiping material 55 on the unwinding roller 541 is used up, a new wiping material 55 can be placed at the unwinding roller 541. In actual operation, the wiping motor 52 drives the take-up roller 531 to rotate to wind up the wiping material 55, and the wiping material 55 drives the unwinding roller 541 to rotate, and causes the wiping material 55 to pass through the wiping roller 542. The wiping material 55 that has been used to wipe the sheet material 200 (used wiping material 55) is wound onto the take-up roller 531 via a reel. After the take-up roller 531 is full of wiping material 55, the wiping material 55 at the take-up roller 531 can be removed and recycled.

[0080] Understandably, after the sheet material 200 completes the roll coating, it moves over the wiping roller 542. During this process, the beginning and end of the sheet material 200 pass sequentially over the wiping roller 542. The wiping material 55 at the wiping roller 542 can wipe away and absorb the residual liquid at the end of the sheet material 200, transferring the residual liquid onto the wiping material 55, thus ensuring uniform roll coating on the surface of the sheet material 200. Furthermore, by continuously tensioning and conveying the wiping material 55 using the unwinding roller 541, the wiping roller 542, and the take-up roller 531, unused wiping material 55 can be continuously provided at the wiping roller 542, thereby improving the cleanliness of the wiping process.

[0081] Thus, by wiping the residual liquid at the end of the sheet material 200 after the roll coating is completed by the wiping device 50, the residual liquid on the sheet material 200 can be transferred to the wiping material 55, ensuring the uniformity and consistency of the coating layer of the sheet material 200, reducing the formation of uneven perovskite layers, improving the photoelectric conversion efficiency of the solar cell, thereby improving the overall performance and reliability of the solar cell, and avoiding the risk of residual liquid forming a conductive path that causes a short circuit inside the solar cell, thus improving the working life and working stability of the solar cell.

[0082] Meanwhile, wiping away the tailings reduces subsequent cleaning and processing steps, simplifying the entire production process, lowering the production cost of perovskite solar cells, and preventing the tailings from reacting with other materials to generate contaminants, thus improving the purity of the solar cells. It also avoids the tailings affecting subsequent process steps (such as heat treatment and encapsulation). Furthermore, the tailings absorbed on the wiping material 55 can be recycled and reused, reducing solution waste, lowering raw material costs, and meeting environmental protection requirements, thus contributing to green production.

[0083] Please refer to the following: Figures 12 to 14It is worth noting that the tilt adjustment function of the adjustment device 30 in the roller coating apparatus 40 of this application can not only be adjusted before the sheet material 200 is roller coated, but also during the roller coating process of the sheet material 200. For example, the adjustment device 30 can dynamically adjust the tilt of the coating roller 41 according to the flatness of the bottom surface of the sheet material 200, so as to ensure that the coating roller 41 can make large-area contact with the bottom surface of the sheet material 200 and achieve a better coating effect.

[0084] Specifically, the coating equipment 100 also includes a control device, and a detection device 20 is electrically connected to the control device. The detection device 20 is used to detect the control device and send the detection result to the control device for processing. An adjustment device 30 is electrically connected to the control device, and the adjustment device is used to adjust the tilt of the roller coating device 40 in response to the control signal sent by the control device, thereby adjusting the axial direction of the coating roller 41. In this embodiment, without adjustment, the axial direction of the coating roller 41 is parallel to the horizontal direction and perpendicular to the first direction; after adjustment, the axial direction of the coating roller 41 forms an angle with the horizontal direction and is perpendicular to the first direction.

[0085] Specifically, the control device is used to acquire detection information from the detection device 20; based on the detection information of multiple detection points, it obtains the coating tilt amount of the corresponding coating surface 201; based on the coating tilt amount, it generates a control command and sends it to the adjustment device 30 to control the adjustment device 30 to adjust the tilt of the roller coating device 40 so that the axial direction of the coating roller 41 is parallel to the extension direction of the coating surface 201.

[0086] In this embodiment, the coating surface 201 of the sheet material 200 has multiple detection points, and the distribution direction of the multiple detection points is perpendicular to the first direction. The detection device 20 is used to detect the multiple detection points of the coating surface 201 to obtain detection information. The detection information is used to reflect the inclination of the coating surface 201 relative to the horizontal plane. The adjustment device 30 is used to adjust the inclination of the roller coating device 40 according to the detection information, so that the axial direction of the coating roller 41 is parallel to the extension direction of the coating surface 201.

[0087] For ease of understanding, the working process of the coating equipment 100 is described below as an example. The working process of the coating equipment 100 may include the following steps.

[0088] S101, The sheet material 200 to be roller coated is received through the feeding platform 11.

[0089] S102. Drive the gripping device 60 to move to the feeding platform 11 via the drive device 70, and grip the sheet material 200 via the gripping device 60.

[0090] S103. The gripping device 60 is moved by the driving device 70, causing the sheet material 200 to move past the detection device 20. The detection device 20 detects the sheet material 200 and obtains detection information.

[0091] S104. The gripping device 60 is moved by the driving device 70, so that the sheet material 200 moves through the roller coating device 40. During this process, the roller coating device 40 rolls the solution onto the coating surface 201 of the sheet material 200 through the coating roller 41.

[0092] S105. The gripping device 60 is moved by the driving device 70, so that the sheet material 200 moves past the wiping device 50, so that the wiping device 50 wipes away the residual liquid on the sheet material 200. The adjusting device 30 adjusts the inclination of the roller coating device 40 so that the axial direction of the coating roller 41 is parallel to the extension direction of the coating surface 201.

[0093] S106. Drive the gripping device 60 to move to the unloading platform 12 via the drive device 70. Place the coated sheet material 200 on the unloading platform 12 via the gripping device 60 and wait for the unloading equipment to take away the sheet material 200.

[0094] It is understood that during the roll coating process of the coating roller 41 on the sheet material 200, the tangent on the periphery of the coating roller 41 contacts the coating surface 201 of the sheet material 200, and the tangent of the coating roller 41 is parallel to the axial direction of the coating roller 41. This application obtains detection information of the sheet material 200 through the detection device 20, and adjusts the inclination of the roll coating device 40 according to the detection information through the adjustment device 30, so that the axial direction of the coating roller 41 is parallel to the extension direction of the coating surface 201. During the process of the sheet material 200 passing through the coating roller 41, the tangent of the coating roller 41 is parallel to the coating surface 201 of the sheet material 200. Along the axial direction of the coating roller 41, different positions on the tangent of the coating roller 41 maintain good contact with the coating surface 201 of the sheet material 200, thereby improving the uniformity of the roll coating.

[0095] In this embodiment, the coating surface 201 is formed with multiple sub-regions along the first direction, and each sub-region has multiple detection points. Based on the detection information of the detection points corresponding to the sub-regions, the coating tilt amount corresponding to the sub-regions can be obtained.

[0096] As the sheet material 200 passes through the coating roller 41, multiple sub-regions sequentially pass through the coating roller 41. During this process, the adjusting device 30 continuously adjusts the inclination of the roller coating device 40 so that the axial direction of the coating roller 41 is parallel to the extension direction of the sub-region surface when each sub-region passes through the coating roller 41. In this way, good contact is maintained between different positions on the tangent of the coating roller 41 and the surface of the sub-region along the axial direction of the coating roller 41, thereby improving the overall uniformity of the roller coating of the sheet material 200.

[0097] For example, multiple detection points are divided into first points and second points, which are distributed on opposite sides of the sheet material 200. Correspondingly, multiple distance measuring components 22 are divided into a first measuring component 221 corresponding to the first point and a second measuring component 222 corresponding to the second point. When the sheet material 200 passes directly above the laser measuring module, the first point passes directly above the first measuring component 221, and the second point passes directly above the second measuring component 222. Thus, the detection information includes the first distance corresponding to the first point and the second distance corresponding to the second point. Based on the distance difference between the first and second distances, the corresponding coating tilt amount can be obtained.

[0098] When the sheet material 200 has multiple sub-regions, each sub-region has a corresponding first point and a second point. When the sheet material 200 passes directly above the laser measurement module, the first points of the multiple sub-regions pass directly above the first measurement component 221 in sequence, and the second points of the multiple sub-regions pass directly above the second measurement component 222 in sequence.

[0099] Thus, the detection information includes the first distance and the second distance corresponding to each sub-region. Based on the distance difference between the first distance and the second distance, the coating tilt amount corresponding to each sub-region can be obtained. In the actual detection process, it is only necessary to let the sheet material 200 pass over the distance measuring component 22 at a preset speed to obtain the measurement results corresponding to each set of detection points. The detection method is simple and fast, improving measurement efficiency.

[0100] It is worth noting that in this embodiment, the detection device 20 only detects the first and second detection points, and the coating tilt of the sub-region is actually the tilt of the line connecting the first and second points. In other embodiments, the detection device 20 may also detect multiple detection points and use the thickness values ​​corresponding to the multiple detection points to analyze the tilt of the sub-region. This application does not impose any restrictions on this.

[0101] It is understood that the sub-regions are intended to describe the detection area when the sheet material 200 passes through the detection device 20. The sub-regions themselves are not directly divided on the sheet material 200. The number and width of the sub-regions can be determined by the detection step size of the detection device 20 and the moving speed of the sheet material 200. For example, when high accuracy is required, the speed at which the sheet material 200 moves through the detection device 20 can be slowed down, or the time interval for data acquisition by the detection device 20 can be shortened, thereby obtaining denser and more numerous sub-regions and corresponding detection points. Conversely, when lower accuracy is required, the speed at which the sheet material 200 moves through the detection device 20 can be increased, or the time interval for data acquisition by the detection device 20 can be extended, thereby obtaining sparser and fewer sub-regions and corresponding detection points. This application does not impose any limitations on this.

[0102] This application also provides a control method applied to a coating apparatus 100. The control method can be executed by a control device of the coating apparatus 100. Specifically, the control device may include a processor and a memory, the memory storing executable instructions of the processor. The processor executes the executable instructions, causing the control device to implement the control method.

[0103] The control method specifically includes the following steps.

[0104] S201. Obtain detection information from the detection device 20. The detection information is obtained by the detection device 20 through multiple detection positioning detections. The detection information reflects the inclination of the coating surface 201 relative to the horizontal plane.

[0105] S202. Based on the detection information from multiple detection points, obtain the coating tilt amount of the corresponding coating surface 201. The coating tilt amount is used to reflect the inclination of the coating surface 201 relative to the horizontal plane.

[0106] S203. A control command is generated based on the coating surface tilt amount and sent to the adjustment device 30. The adjustment device 30 adjusts the tilt of the roller coating device 40 according to the control command, so that the axial direction of the coating roller 41 is parallel to the extension direction of the coating surface 201.

[0107] Thus, as the sheet material 200 passes through the coating roller 41, the tangent of the coating roller 41 is parallel to the coating surface 201 of the sheet material 200. Along the axial direction of the coating roller 41, different positions on the tangent of the coating roller 41 maintain good contact with the coating surface 201 of the sheet material 200, thereby improving the uniformity of roller coating.

[0108] In some embodiments, the coating surface 201 is formed with a plurality of sub-regions along a first direction, and each sub-region has a plurality of detection points.

[0109] Step S203 specifically includes: obtaining a tilt curve based on the coating tilt amount corresponding to each sub-region, generating a control command based on the tilt curve, and sending it to the adjustment device 30. The tilt curve includes the coating tilt amount corresponding to each sub-region. The adjustment device 30 adjusts the tilt of the roller coating device 40 according to the control command, so that the axial direction of the coating roller 41 is parallel to the extension direction of the sub-region passing through the coating roller 41.

[0110] Thus, as the sheet material 200 passes through the coating roller 41, multiple sub-regions will sequentially pass through the coating roller 41. During this process, the adjusting device 30 continuously adjusts the inclination of the roller coating device 40 so that when each sub-region passes through the coating roller 41, the axial direction of the coating roller 41 is parallel to the extension direction of the sub-region surface. In this way, along the axial direction of the coating roller 41, different positions on the tangent of the coating roller 41 maintain good contact with the surface of the sub-region, thereby improving the overall uniformity of the roller coating of the sheet material 200.

[0111] In the example of this application, multiple detection points are divided into first points and second points, which are distributed on opposite sides of the sheet material 200. Each sub-region has corresponding first and second points.

[0112] Correspondingly, the multiple distance measuring components 22 are divided into a first measuring component 221 corresponding to the first point and a second measuring component 222 corresponding to the second point. When the sheet material 200 passes directly above the laser measuring module, the first points of the multiple sub-regions pass directly above the first measuring component 221 in sequence, and the second points of the multiple sub-regions pass directly above the second measuring component 222 in sequence.

[0113] The detection information includes a first distance and a second distance corresponding to each sub-region. The first distance is the distance from the first measuring component 221 to the first point, and the second distance is the distance from the second measuring component 222 to the second point. The coating tilt amount is the difference between the first distance and the second distance.

[0114] For ease of understanding, the following example illustrates the tilt angle of the sheet material 200.

[0115] The sheet material 200 has n sub-regions along a first direction, namely: sub-regions Q1, Q2, Q3, ..., Qn. Each sub-region of the sheet material 200 corresponds to a first point A and a second point B. The first point A corresponding to sub-regions Q1, Q2, Q3, ..., Qn is: first point A1, A2, A3, ..., An. The second point B corresponding to sub-regions Q1, Q2, Q3, ..., Qn is: second point B1, B2, B3, ..., Bn.

[0116] In this context, the coating tilt amount for sub-region Q1 is the distance difference between the first distance of the first point A1 and the second distance of the second point A1. The coating tilt amount for sub-region Q2 is the distance difference between the first distance of the first point A2 and the second distance of the second point A2. The coating tilt amount for sub-region Q3 is the distance difference between the first distance of the first point A3 and the second distance of the second point A3. The coating tilt amount for sub-region Qn is the distance difference between the first distance of the first point An and the second distance of the second point An. Based on the coating tilt amounts corresponding to sub-regions Q1, Q2, Q3, ..., Qn, tilt amount curves can be generated.

[0117] Figure 14 The x-coordinate in the figure indicates the degree of inclination, and the y-coordinate in the figure indicates the stroke position of the sheet material 200 as it passes through the coating roller 41. Figure 14 The solid line L1 in the figure is the tilt curve of the sheet material 200, which reflects the tilt of the coating surface corresponding to each sub-region of the sheet material 200. The tilt of the coating surface is proportional to the tilt degree. The dashed line L2 in the figure is the tilt degree curve of the tangent of the coating roller 41, which reflects the tilt degree of the tangent of the coating roller 41 when it is not adjusted (i.e., the axial direction is parallel to the horizontal direction).

[0118] It is understood that during the process of the sheet material 200 passing through the coating roller 41, sub-regions Q1, Q2, Q3, ..., Qn will pass through the coating roller 41 in sequence. During this process, the adjusting device 30 continuously adjusts the inclination of the roller coating device 40 so that when the sub-regions Q1, Q2, Q3, ..., Qn pass through the coating roller 41, the axial direction of the coating roller 41 can be parallel to the extension direction of the surface of the sub-regions Q1, Q2, Q3, ..., Qn, ensuring that the tangent of the coating roller 41 maintains good contact with the surface of the sub-region, thereby improving the uniformity of roller coating.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A roller coating mechanism, characterized in that, include: A roller coating apparatus includes a support frame, a roller coating motor, and a coating roller, wherein the coating roller is rotatably connected to the support frame, and the roller coating motor is disposed on the support frame and connected to the coating roller; when a sheet material moves along a first direction and passes over the coating roller, the coating roller contacts the sheet material; the axial direction of the coating roller is parallel to a second direction, and the second direction is perpendicular to the first direction; An adjustment device is connected to the support frame, and the adjustment device is used to adjust the inclination of the support frame to change the inclination of the coating roller.

2. The roller coating mechanism according to claim 1, characterized in that, The adjustment device includes a plurality of height adjustment components, which are spaced apart along the second direction; the height adjustment components are connected to the support frame and are used to drive the connection to rise or fall.

3. The roller coating mechanism according to claim 2, characterized in that, The support frame is provided with a plurality of connecting blocks corresponding to the height adjustment component; the height adjustment component is connected to the corresponding connecting block and is used to drive the connecting block to rise or fall. The adjustment device further includes a base and multiple fixing plates corresponding to the height adjustment components. The multiple height adjustment components are installed on the base, the fixing plates are fixed to the base, the fixing plates are provided with guide rails, and the connecting block is slidably connected to the guide rails in the vertical direction.

4. The roller coating mechanism according to claim 3, characterized in that, The height adjustment component is equipped with an elastic element, which is connected to the connecting block and the fixing plate. The elastic element undergoes elastic deformation as it moves relative to the connecting block and the fixing plate.

5. The roller coating mechanism according to claim 3, characterized in that, The height adjustment component is equipped with a grating ruler, which is used to measure the displacement of the connecting block caused by the height adjustment component.

6. The roller coating mechanism according to claim 3, characterized in that, The height adjustment component is equipped with a baffle and multiple sensors disposed on the fixed plate. The baffle moves synchronously with the connecting block. The multiple sensors are distributed at intervals along the vertical direction and pass through the movement path of the baffle. The sensors are used to sense the position of the baffle.

7. The roller coating mechanism according to claim 2, characterized in that, The height adjustment component is a voice coil motor.

8. The roller coating mechanism according to claim 1, characterized in that, The roller coating device also includes a scraper connected to the support frame, and the scraper and the coating roller are spaced apart.

9. The roller coating mechanism according to claim 8, characterized in that, The roller coating apparatus further includes an adjustment component, and the doctor blade is connected to the support frame through the adjustment component. The adjustment component is used to adjust the distance between the doctor blade and the coating roller.

10. The roller coating mechanism according to claim 1, characterized in that, The roller coating apparatus further includes a liquid storage container, which is disposed below the coating roller. The liquid storage container has an inlet and an outlet and is used to store a solution. The lower part of the coating roller is immersed in the liquid storage container and is coated with the solution.

11. A coating apparatus, characterized in that, It includes a frame, a testing device, and a roller coating mechanism as described in any one of claims 1 to 10, wherein the testing device and the roller coating mechanism are disposed on the frame, and the testing device is used to test the flatness of the bottom surface of the sheet material.

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