Coating device and solar cell production line

Abstract

The invention relates to the technical field of coating devices, and provides a coating device and a solar cell production line, the coating device comprises a rack, a coating platform, coating assemblies and a coating driving mechanism, the number of the coating assemblies is two or more, and the multiple coating assemblies are arranged on the rack in the first direction; the coating assembly comprises a coating die head, the coating driving mechanism is arranged on the rack, and the coating driving mechanism is in driving connection with the coating die head and used for driving the coating die head to move in the first direction and the third direction; a to-be-coated product is fed to the coating platform in the first direction or the second direction, and every two of the first direction, the second direction and the third direction are perpendicular to each other; according to the coating device provided by the embodiment of the invention, a plurality of groups of coating die heads can be used for carrying out coating operation at the same time, so that the coating efficiency is effectively improved, the overall production efficiency of the battery can be improved, and the production requirements are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating devices, and particularly provides a coating device and a solar cell production line. BACKGROUND

[0002] The solar cell includes a perovskite solar cell. In a production process of the solar cell, a coating die is generally used to coat a paste to form an active layer or a semiconductor layer. However, in the related art, the device for implementing the coating operation has low coating efficiency, which is difficult to meet the production demand. SUMMARY

[0003] Embodiments of the present application provide a coating device and a solar cell production line, and aim to solve the problem of low coating efficiency of the coating device in the related art.

[0004] To achieve the above object, the technical scheme adopted by embodiments of the present application is as follows.

[0005] In a first aspect, the present application provides a coating device, which includes a rack, a coating platform, a coating assembly, and a coating driving mechanism. The coating platform is arranged on the rack and is used to place a product to be coated. The number of the coating assembly is two or more. A plurality of coating assemblies are arranged on the rack along a first direction. The coating assembly includes a coating die used to coat the product to be coated. The coating driving mechanism is arranged on the rack and is drivingly connected to the coating die and used to drive the coating die to move along the first direction and a third direction. The product to be coated is fed onto the coating platform along the first direction or a second direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0006] The coating device provided by the embodiments of the present application can place the product to be coated on the coating platform, drive the coating dies of the plurality of coating assemblies to move along the third direction by the coating driving mechanism to adjust the distance between the coating dies and the product to be coated, and then drive the plurality of coating dies to coat the product to be coated along the first direction by the coating driving mechanism. Thus, the coating device provided by the embodiments of the present application can simultaneously perform the coating operation by the plurality of coating dies, effectively improve the coating efficiency, and further improve the overall production efficiency of the battery to meet the production demand.

[0007] In some embodiments, the coating platform includes a bearing base and a base driving mechanism. The base driving mechanism is drivingly connected to the bearing base and is used to drive the bearing base to move up and down along the third direction.

[0008] By adopting the technical scheme, the base driving mechanism can drive the bearing base to move up and down along the third direction, so that the bearing base drives the product to be coated to move up and down to adjust the coating position.

[0009] In some embodiments, the coating platform further comprises a substrate jacking mechanism arranged on the bearing base, the substrate jacking mechanism is used for bearing the product to be coated and can drive the product to be coated to move up and down along the third direction.

[0010] By adopting the technical scheme, the substrate jacking mechanism can be used to move the product to be coated up and down along the third direction to further adjust the coating position, or can be jacked up to facilitate the feeding and discharging operation.

[0011] In some embodiments, the coating platform further comprises a first positioning mechanism arranged on the bearing base, the first positioning mechanism is used for positioning adjustment of the product to be coated along the first direction; and / or, the coating platform further comprises a second positioning mechanism arranged on the bearing base, the second positioning mechanism is used for positioning adjustment of the product to be coated along the second direction.

[0012] By adopting the technical scheme, the first positioning mechanism can be used to position the product to be coated along the first direction to improve the coating precision; and / or, the second positioning mechanism can be used to position the product to be coated along the second direction to improve the coating precision.

[0013] In some embodiments, the coating platform further comprises a vacuum suction mechanism and a vacuum breaking blowing mechanism, the bearing base is provided with a vacuum hole group, and the vacuum suction mechanism and the vacuum breaking blowing mechanism are respectively communicated with the vacuum hole group.

[0014] By adopting the technical scheme, the vacuum suction mechanism can be used to perform vacuumizing operation between the product to be coated and the bearing base through the vacuum hole group, so that the product to be coated can be fixed on the bearing base; when it is necessary to release the fixation between the product to be coated and the bearing base, the vacuum breaking blowing mechanism can be used to blow air between the product to be coated and the bearing base through the vacuum hole group to destroy the vacuum environment, so as to achieve the purpose of releasing the fixed state of the product to be coated.

[0015] In some embodiments, the coating platform further comprises a linear displacement sensor arranged on the bearing base, the linear displacement sensor is electrically connected to the coating driving mechanism, and the linear displacement sensor is used for sensing the movement of the coating die.

[0016] By adopting the technical scheme, the linear displacement sensor can be used to detect the linear movement of the coating die and feed back to the coating driving mechanism, so as to realize the purpose of correcting the parallelism between the coating die and the bearing base.

[0017] In some embodiments, the coating platform further comprises a fine adjustment device disposed on the rack, an output end of the fine adjustment device faces the carrier base, and the fine adjustment device is configured to drive the carrier base to move along a third direction.

[0018] By using the above technical solution, the fine adjustment device can further fine tune and adjust the carrier base along the third direction, thereby further improving the horizontal precision of the carrier base.

[0019] In some embodiments, the coating assembly further comprises a gantry mechanism, and the coating driving mechanism comprises a first driving unit and a second driving unit; the first driving unit is disposed on the rack, the first driving unit is drivingly connected to the gantry mechanism and configured to drive the gantry mechanism to move along a first direction; and the second driving unit is disposed on each gantry mechanism, the second driving unit is drivingly connected to the coating die, and the second driving unit is configured to drive the coating die to move along a third direction.

[0020] By using the above technical solution, the first driving unit can drive the gantry mechanism to move along the first direction, and the second driving unit disposed on the gantry mechanism can drive the coating die to move along the third direction, so that the coating die of each coating assembly can move for coating operation.

[0021] In some embodiments, the first driving unit comprises a first driving mechanism and a first guide structure, the first guide structure is disposed on the rack along the first direction, each gantry mechanism is slidingly disposed on the first guide structure, and the first driving mechanism is drivingly connected to each gantry mechanism and configured to drive each gantry mechanism to move along the first direction.

[0022] By using the above technical solution, the first driving mechanism can drive each gantry mechanism to move along the first guide structure in the first direction, so that each coating die can move along the first direction and perform coating operation.

[0023] In some embodiments, the coating driving mechanism further comprises a first position sensor and a first displacement sensor, the first position sensor and the first displacement sensor are electrically connected to the first driving unit, and the first position sensor and the first displacement sensor are configured to sense the position of the coating die in the first direction; and / or, the coating driving mechanism further comprises a second position sensor and a second displacement sensor, the second position sensor and the second displacement sensor are electrically connected to the second driving unit, and the second position sensor and the second displacement sensor are configured to sense the position of the coating die in the third direction.

[0024] By adopting the technical scheme, the first position sensor can be used to detect whether the coating die moves to the position in the first direction, meanwhile, the first displacement sensor can be used to detect the displacement of the coating die, so as to realize the closed-loop control of the first driving unit on the gantry mechanism and the coating die; and / or, the second position sensor can be used to detect whether the coating die moves to the position in the third direction, and / or, the second displacement sensor can be used to detect the displacement of the coating die, so as to realize the closed-loop control of the second driving unit on the coating die.

[0025] In some embodiments, the coating driving mechanism further comprises a three-dimensional displacement sensor, the three-dimensional displacement sensor being electrically connected to the first driving unit and the second driving unit, and the three-dimensional displacement sensor being used to sense the coating die; and / or, the coating driving mechanism further comprises a thickness detection sensor, the thickness detection sensor being electrically connected to the second driving unit, and the thickness detection sensor being used to sense the thickness of the product to be coated.

[0026] By adopting the technical scheme, the three-dimensional displacement sensor is used to detect the current position of the coating die, so as to further improve the moving precision of the coating die; and / or, the thickness detection sensor is used to detect the thickness of the product to be coated, so as to further adjust the height of the coating die, and improve the coating quality of the coating die.

[0027] In some embodiments, the coating die is internally formed with a first cavity and a second cavity in communication, the coating die is provided with a feeding port communicated to the first cavity and a lip port communicated to the second cavity; in the third direction, the first cavity is located above the second cavity; in the extension direction of the first cavity and away from the feeding port, the height of the first cavity in the third direction presents a decreasing trend.

[0028] By adopting the technical scheme, the coating is introduced into the first cavity through the feeding port, and the coating diffuses in the extension direction of the first cavity and flows into the second cavity according to its own gravity, the height change of the first cavity in the third direction makes the flow of the coating in the extension direction of the first cavity into the second cavity more uniform, which can effectively improve the flow uniformity of the coating in the second cavity, so that the film thickness uniformity of the coating flowing out of the lip port is better.

[0029] In some embodiments, the coating die is provided with a fine adjustment bolt, the fine adjustment bolt being used to adjust the slit thickness of the lip port.

[0030] By adopting the technical scheme, the fine adjustment bolt can be used to adjust the slit thickness of the lip port, so as to adjust the thickness of the coating led out of the lip port, and improve the film thickness uniformity along the direction of the lip port.

[0031] In some embodiments, the coating device further comprises a cleaning and pre-coating assembly, and the cleaning and pre-coating assembly is arranged on the opposite sides of the coating platform in the second direction.

[0032] By using the above technical solutions, the cleaning and pre-coating assembly can be used to clean or pre-coat the coating die before the coating operation, so as to improve the cleanliness of the coating die and further improve the coating quality.

[0033] In some embodiments, the cleaning and pre-coating assembly comprises a pre-coating structure arranged on the rack, and the pre-coating structure is used for pre-coating the coating die.

[0034] By using the above technical solutions, the pre-coating structure is used for pre-coating the coating die, so as to improve the liquid output effect of the lip of the coating die and further improve the coating quality.

[0035] In some embodiments, the cleaning and pre-coating assembly comprises a first scraper and a first horizontal movement driving mechanism, the first horizontal movement driving mechanism is arranged on the rack, the first horizontal movement driving mechanism is drivingly connected to the first scraper, and the first horizontal movement driving mechanism is used to drive the first scraper to scrape along the pre-coating structure.

[0036] By using the above technical solutions, the first horizontal movement driving mechanism can drive the first scraper to scrape along the pre-coating structure, so that the first scraper can remove impurities and coating on the pre-coating structure, so as to facilitate the normal operation of the subsequent pre-coating operation.

[0037] In some embodiments, the cleaning and pre-coating assembly comprises an immersion tank arranged on the rack, and the immersion tank is used for immersing the coating die.

[0038] By using the above technical solutions, the coating die can be moved into the immersion tank for immersion, so as to achieve the purposes of immersion and cleaning.

[0039] In some embodiments, the immersion tank is provided with a die lip cleaning assembly, and the die lip cleaning assembly is used for cleaning the lip of the coating die.

[0040] By using the above technical solutions, the die lip cleaning assembly can be used to clean the coating die, so as to improve the coating quality of the coating die.

[0041] In some embodiments, the die lip cleaning assembly comprises a second scraper, a second horizontal movement driving mechanism and a pushing mechanism, the pushing mechanism is drivingly connected to the second scraper and is used to drive the second scraper to move in the first direction, and the second horizontal movement driving mechanism is drivingly connected to the pushing mechanism and is used to drive the pushing mechanism to move in the second direction.

[0042] By adopting the technical scheme, the second scraper can be driven to move along the first direction by the pushing mechanism, and the pushing mechanism and the second scraper can be driven to move along the second direction by the second transverse driving mechanism, so that the second scraper can scrape off the crystalline substance at the lip of the coating die.

[0043] In some embodiments, the second scraper is concave and forms a scraping groove for inserting the coating die, and a groove wall of the scraping groove abuts against a surface of the coating die.

[0044] By adopting the technical scheme, the crystalline substance on the surface of the coating die abutting against the groove wall of the scraping groove can be scraped off, so that the surface of the coating die can be cleaned more comprehensively.

[0045] In some embodiments, the die lip cleaning assembly further comprises a spraying device, and a cleaning nozzle of the spraying device is arranged on the second scraper.

[0046] By adopting the technical scheme, the surface of the coating die or the surface of the second scraper can be sprayed and cleaned by the cleaning nozzle.

[0047] In some embodiments, the coating assembly further comprises a feeding unit, and the feeding unit comprises a liquid injection mechanism and a liquid supply structure, and the liquid supply structure is connected to the coating die through the liquid injection mechanism.

[0048] By adopting the technical scheme, the liquid injection mechanism can inject the coating in the liquid supply structure into the coating die, so that the coating die can perform normal coating operation.

[0049] In some embodiments, the liquid supply structure comprises a liquid supply tank and a liquid storage tank, the liquid storage tank is provided with a pressurizing pipeline, a pressure relief pipeline and a liquid outlet pipeline, the liquid storage tank is communicated to the liquid supply tank through the liquid outlet pipeline, the liquid supply tank is provided with a diaphragm valve and a liquid supply pipeline, and the liquid supply tank is connected to the liquid injection mechanism through the liquid supply pipeline.

[0050] By adopting the technical scheme, the inside of the liquid supply tank is sealed and separated by the diaphragm valve, when the liquid injection mechanism injects the coating in the liquid supply tank into the coating die through the liquid supply pipeline, the liquid supply tank will suck the coating from the liquid storage tank through the liquid outlet pipeline according to the internal air pressure, so that the liquid level in the liquid supply tank remains unchanged.

[0051] In some embodiments, the tube end of the liquid outlet pipeline is higher than the tube end of the liquid supply pipeline.

[0052] By adopting the technical scheme, since the density of the bubbles is smaller than the density of the coating, when the bubbles are generated, the bubbles will float on the liquid surface of the coating, and the tube end of the liquid supply pipeline is lower, so the probability of the bubbles entering the liquid supply pipeline is low, and the probability of the coating containing bubbles introduced into the coating die is also low, so the coating quality is effectively improved.

[0053] In some embodiments, the coating device further comprises an air knife mechanism, the air knife mechanism is arranged on one side of the coating die in the second direction, and an air outlet of the air knife mechanism faces the product to be coated.

[0054] By adopting the technical scheme, the air knife mechanism can be used to quickly dry the coating on the surface of the product to be coated, helping the coating to quickly solidify and cure. Meanwhile, the air knife mechanism can also adjust the thickness of the coating film formed by controlling the speed and direction of the airflow, so as to improve the uniformity of the coating.

[0055] In some embodiments, the air knife mechanism is provided with a first adjusting mechanism, a second adjusting mechanism and an angle adjusting mechanism. The first adjusting mechanism is used to adjust the position of the air outlet in the first direction, the second adjusting mechanism is used to adjust the position of the air outlet in the third direction, and the angle adjusting mechanism is used to adjust the included angle between the air outlet and the third direction.

[0056] By adopting the technical scheme, the first adjusting mechanism, the second adjusting mechanism and the angle adjusting mechanism can be used to adjust the position of the air outlet of the air knife mechanism, so as to adjust the blowing effect of the air knife mechanism.

[0057] In some embodiments, the coating device further comprises a liquid laying monitoring mechanism, the liquid laying monitoring mechanism is arranged on the coating die, and an output end of the liquid laying monitoring mechanism faces the product to be coated.

[0058] By adopting the technical scheme, the liquid laying monitoring mechanism can be used to monitor the coating condition of the product to be coated. Since the liquid laying monitoring mechanism is arranged on the coating die, the liquid laying monitoring mechanism can move synchronously with the coating die to monitor and shoot.

[0059] In some embodiments, the coating device further comprises a controller, the controller is electrically connected to the coating platform and the coating driving mechanism.

[0060] By adopting the technical scheme, the controller can be used to electrically control the coating platform and the coating driving mechanism, so as to improve the automation degree of the coating device.

[0061] In a second aspect, the embodiments of the present application also provide a solar cell production line, comprising a feeding and discharging device and the coating device as described above, the feeding and discharging device is used for feeding and discharging operation to the coating device.

[0062] The solar cell production line provided by the embodiments of the present application comprises the coating device as described above. In the case that the coating efficiency of the coating device is high, the production efficiency of the solar cell production line is also effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0064] Figure 1 A schematic diagram of the overall structure of the coating device provided in an embodiment of the present application;

[0065] Figure 2 A front view of a coating device provided in an embodiment of the present application;

[0066] Figure 3 for Figure 2 A local enlarged schematic diagram of point A;

[0067] Figure 4 A top view of a coating device provided in an embodiment of the present application;

[0068] Figure 5 A side view of a coating device provided in an embodiment of the present application;

[0069] Figure 6 A schematic diagram of the structure of the coating platform provided in an embodiment of the present application;

[0070] Figure 7 for Figure 6 A partial enlarged schematic diagram of point B;

[0071] Figure 8 A schematic structural diagram of a second drive unit provided in an embodiment of the present application;

[0072] Figure 9 A schematic diagram of the internal structure of a coating die provided in an embodiment of the present application;

[0073] Figure 10 A side view of a coating die provided in an embodiment of the present application;

[0074] Figure 11 A cross-sectional view of a coating die provided in an embodiment of the present application;

[0075] Figure 12 A schematic structural diagram of the pre-coating structure provided in an embodiment of the present application;

[0076] Figure 13 A schematic diagram of the structure of the immersion tank provided in an embodiment of the present application;

[0077] Figure 14 A schematic diagram of the structure of the die lip cleaning assembly provided in an embodiment of the present application;

[0078] Figure 15 A structure schematic diagram of the liquid injection mechanism provided for the embodiment of the present application is shown in the figure;

[0079] Figure 16 A structure schematic diagram of the liquid supply structure provided for the embodiment of the present application is shown in the figure;

[0080] Figure 17 A connection schematic diagram of the liquid storage tank and the liquid supply tank provided for the embodiment of the present application is shown in the figure;

[0081] Figure 18 A partial structure schematic diagram of the solar cell production line provided for the embodiment of the present application is shown in the figure.

[0082] In the figure, various reference signs are as follows:

[0083] 10, solar cell production line;

[0084] 1000, coating device; 2000, feeding and discharging device;

[0085] 100, rack; 110, buffer structure;

[0086] 200, coating platform; 210, bearing base; 211, vacuum hole group; 220, base driving mechanism; 230, substrate jacking mechanism; 240, first positioning mechanism; 250, second positioning mechanism; 260, vacuum adsorption mechanism; 270, vacuum breaking and blowing mechanism; 280, linear displacement sensor; 290, fine adjustment device;

[0087] 300, coating assembly; 310, coating die; 311, first cavity; 312, second cavity; 313, feeding port; 314, lip; 315, bubble discharge port; 320, gantry mechanism; 321, gantry; 322, moving base; 330, fine adjustment bolt; 340, anti-collision structure; 350, feeding unit; 351, liquid injection mechanism; 352, liquid supply structure; 3521, liquid storage tank; 35211, pressurizing pipeline; 35212, pressure relief pipeline; 35213, liquid outlet pipeline; 3522, liquid supply tank; 35221, diaphragm valve; 35222, liquid supply pipeline; 35223, liquid level sensor; 353, chemical liquid valve pipeline system; 354, pneumatic control valve; 355, pressure regulating valve; 356, pipeline pressure regulating and monitoring device;

[0088] 400, coating driving mechanism; 410, first driving unit; 411, first driving mechanism; 412, first guiding structure; 420, second driving unit; 421, second driving mechanism; 422, second guiding structure; 423, auxiliary guide rail; 424, auxiliary sliding block; 425, auxiliary air cylinder; 440, first displacement sensor; 450, second position sensor; 460, second displacement sensor; 470, three-dimensional displacement sensor; 480, thickness detection sensor;

[0089] 500, cleaning pre-coating assembly; 510, pre-coating structure; 511, first scraper; 512, first transverse driving mechanism; 520, liquid immersion tank; 521, sealing strip; 522, liquid supply hole; 523, overflow hole; 530, die lip cleaning assembly; 531, second scraper; 5311, scraping groove; 532, second transverse driving mechanism; 533, advancing mechanism; 534, cleaning air nozzle; 535, cleaning tank;

[0090] 600, air knife mechanism; 610, first adjusting mechanism; 620, second adjusting mechanism; 630, angle adjusting mechanism;

[0091] 700, liquid laying monitoring mechanism; 800, glove box;

[0092] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0093] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and should not be understood as limiting the present application.

[0094] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "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 purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying 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 limiting the present application.

[0095] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" or "third" can include, explicitly or implicitly, one or more of such features. In the description of the present application, the meaning of "a plurality of" is two or more, unless explicitly specified and limited otherwise.

[0096] In the present application, unless explicitly specified and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0097] The solar cell includes a perovskite solar cell. In the production process of the solar cell, a coating die is generally used to coat the slurry to form an active layer or a semiconductor layer. However, in the related art, the device used to realize the coating operation has low coating efficiency, which is difficult to meet the production demand.

[0098] The solar cell includes a perovskite solar cell. In the production process of the solar cell, a coating die is generally used to coat the slurry to form an active layer or a semiconductor layer. However, in the related art, the device used to realize the coating operation has low coating efficiency, which is difficult to meet the production demand.

[0099] Based on the above consideration, in order to solve the problem of low coating efficiency of the coating device in the related art, a coating device is designed. By setting multiple groups of coating assemblies on the rack, the coating die of the multiple groups of coating assemblies can be used to simultaneously coat the products to be coated, which can meet the process requirement of simultaneously coating two or more coatings, and effectively improve the coating efficiency.

[0100] The coating device disclosed in the embodiments of the present application can be used, but is not limited to, for coating process in the production process of solar cells, for example, coating and film forming process of solar perovskite battery. The solar cell processed by the coating device can be used, but is not limited to, for electric equipment such as vehicles, ships or aircraft, and can also be used in photovoltaic systems.

[0101] The following embodiments are described for convenience of description, taking a coating device of an embodiment of the present application for coating to form a film layer of a solar cell as an example.

[0102] Please refer to Figure 2 , Figure 4 ,Figure 5 and Figure 9 In a first aspect, the embodiments of the present application provide a coating device 1000, comprising a rack 100, a coating platform 200, a coating assembly 300, and a coating driving mechanism 400. The coating platform 200 is arranged on the rack 100 and is used to place a product to be coated. The number of the coating assembly 300 is two or more, and a plurality of coating assemblies 300 are arranged on the rack 100 along a first direction X. The coating assembly 300 comprises a coating die head 310 used for coating the product to be coated. The coating driving mechanism 400 is arranged on the rack 100 and is drivingly connected to the coating die head 310 and used to drive the coating die head 310 to move along the first direction X and a third direction Z. The product to be coated is fed onto the coating platform 200 along the first direction X or a second direction Y, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0103] The rack 100 is used to support the assembly of other components. The rack 100 can be made of marble, stainless steel, alloy, etc.

[0104] The coating platform 200 is used to carry the product to be coated for placement and coating of the product to be coated.

[0105] The product to be coated can be fed onto the coating platform 200 by an external device (such as a robot, a conveyor belt, etc.) to realize the coating operation. Alternatively, the product to be coated can be fed onto the coating platform 200 along the first direction X or the second direction Y.

[0106] The coating assembly 300 is used to perform the coating operation. The number of the coating assembly 300 is two or more. For example, the number of the coating assembly 300 can be two, three, etc.

[0107] The coating assembly 300 comprises a coating die head 310 used for coating the product to be coated with paint to form a film layer. It should be understood that the coating die head 310 has a lip, and the paint can be guided out of the lip of the coating die head 310 and coated on the product to be coated. Alternatively, the coating die head 310 can be made of corrosion-resistant materials such as alloy steel, stainless steel, and composite ceramic to improve the service life of the coating die head 310.

[0108] The coating driving mechanism 400 is drivingly connected to the coating die head 310, and the coating driving mechanism 400 can drive the coating die head 310 to move along the first direction X and the third direction Z to realize the coating operation of the coating die head 310.

[0109] The plurality of coating assemblies 300 are arranged on the rack 100 along the first direction X, and the coating driving mechanism 400 can drive the coating die head 310 to move along the first direction X and the third direction Z, so that the coating die head 310 of each of the plurality of coating assemblies 300 can be driven to move along the first direction X, and the plurality of coating die heads 310 can simultaneously perform zoned coating on the product to be coated along the first direction X, thereby effectively improving the coating efficiency.

[0110] It should be understood that, in the second direction Y, the length h of the coating die head 310 should be greater than or equal to the length of the product to be coated, so that when the coating die head 310 moves along the first direction X and performs coating, the coating die head 310 can completely cover the width of the product to be coated in the second direction Y, and therefore the coating driving mechanism 400 only needs to adjust the displacement of the coating die head 310 in the first direction X and the third direction Z.

[0111] The first direction X, the second direction Y and the third direction Z are perpendicular to each other; the first direction X can be the length direction of the rack 100, the second direction Y can be the width direction of the rack 100, and the third direction Z can be the height direction of the rack 100; specifically, the first direction X, the second direction Y and the third direction Z are as shown in Figure 2 、 Figure 4 and Figure 5 .

[0112] The coating device 1000 provided by the embodiment of the present application can place the product to be coated on the coating platform 200, drive the coating die head 310 of the plurality of coating assemblies 300 to move along the third direction Z by the coating driving mechanism 400 to adjust the distance from the product to be coated, and then drive the plurality of coating die heads 310 to move along the first direction X by the coating driving mechanism 400 to perform coating or pre-coating on the product to be coated. Therefore, the coating device 1000 provided by the embodiment of the present application can simultaneously perform coating by the plurality of coating die heads 310, effectively improving the coating efficiency, thereby improving the overall production efficiency of the solar cell to meet the production demand.

[0113] Please refer to Figure 2 and Figure 6 In some embodiments, the coating platform 200 includes a bearing base 210 and a base driving mechanism 220, the base driving mechanism 220 is connected to the bearing base 210, and the base driving mechanism 220 is used to drive the bearing base 210 to move up and down along the third direction Z.

[0114] The bearing base 210 is used to bear the product to be coated; optionally, the bearing base 210 can be a base structure made of marble.

[0115] The base driving mechanism 220 is configured to drive the base 210 to move up and down along the third direction Z. Optionally, the base driving mechanism 220 can be a driving cylinder, a driving hydraulic cylinder, a roller screw driving structure, or the like. The number of the base driving mechanism 220 can be one or more.

[0116] The base driving mechanism 220 can be mounted on the rack 100, or can be mounted independently of the rack 100, for example, in the space below the rack 100.

[0117] In this way, the base driving mechanism 220 can drive the base 210 to move up and down along the third direction Z, so that the base 210 drives the product to be coated to move up and down to adjust the coating position.

[0118] Please refer to Figure 2 and Figure 6 In some embodiments, the coating platform 200 further comprises a substrate lifting mechanism 230 arranged on the base 210, and the substrate lifting mechanism 230 is configured to carry the product to be coated and drive the product to be coated to move up and down along the third direction Z.

[0119] The substrate lifting mechanism 230 is configured to lift the product to be coated, so that the product to be coated can move up and down along the third direction Z.

[0120] Optionally, the substrate lifting mechanism 230 includes but is not limited to a driving cylinder, a driving hydraulic cylinder, a driving motor, or the like. The substrate lifting mechanism 230 can be fixedly installed on the base 210 by screwing, fastening, clamping, or the like. The number of the substrate lifting mechanism 230 can be one or more.

[0121] For example, the substrate lifting mechanism 230 can include a lifting driving structure and a needle structure, the lifting driving structure is drivingly connected to the needle structure and can drive the needle structure to move up and down along the third direction Z, so that the needle structure can be lifted for feeding or discharging operation.

[0122] In this way, the substrate lifting mechanism 230 can be used to move the product to be coated up and down along the third direction Z to further adjust the coating position, or can be lifted for feeding or discharging operation.

[0123] Please refer to Figure 2 , Figure 4 and Figure 6In some embodiments, the coating platform 200 further comprises a first positioning mechanism 240 disposed on the bearing base 210, the first positioning mechanism 240 being configured to adjust the position of the product to be coated in the first direction X; and / or, the coating platform 200 further comprises a second positioning mechanism 250 disposed on the bearing base 210, the second positioning mechanism 250 being configured to adjust the position of the product to be coated in the second direction Y.

[0124] The first positioning mechanism 240 is configured to adjust the position of the product to be coated in the first direction X.

[0125] Optionally, in some embodiments, the first positioning mechanism 240 can be selected as a hard limiting structure (e.g., a limiting plate, a limiting column, etc.), by disposing the hard limiting structure at the opposite ends in the first direction X, when the product to be coated is sent into the coating platform 200, the movement of the product to be coated can be limited by the hard limiting structure, thereby reducing the probability of deviation of the product to be coated in the first direction X.

[0126] Alternatively, in other embodiments, the first positioning mechanism 240 is disposed at the opposite ends in the first direction X; the first positioning mechanism 240 can comprise a positioning driving mechanism (e.g., a driving motor, a driving cylinder, a driving hydraulic cylinder, etc.) and a positioning adjustment structure (e.g., a push plate, a push block, etc.), the positioning mechanism can drive the positioning adjustment structure to move along the first direction X and towards the product to be coated, and adjust the position of the product to be coated, so as to achieve the purpose of positioning adjustment.

[0127] The second positioning mechanism 250 is configured to adjust the position of the product to be coated in the second direction Y.

[0128] Optionally, in some embodiments, the second positioning mechanism 250 can be selected as a hard limiting structure (e.g., a limiting plate, a limiting column, etc.), by disposing the hard limiting structure at the opposite ends in the second direction Y, when the product to be coated is sent into the coating platform 200, the movement of the product to be coated can be limited by the hard limiting structure, thereby reducing the probability of deviation of the product to be coated in the second direction Y.

[0129] Alternatively, in other embodiments, the second positioning mechanism 250 is disposed at the opposite ends in the second direction Y; the second positioning mechanism 250 can comprise a positioning driving mechanism (e.g., a driving motor, a driving cylinder, a driving hydraulic cylinder, etc.) and a positioning adjustment structure (e.g., a push plate, a push block, etc.), the positioning mechanism can drive the positioning adjustment structure to move along the second direction Y and towards the product to be coated, and adjust the position of the product to be coated, so as to achieve the purpose of positioning adjustment.

[0130] The first positioning mechanism 240 can be arranged on the bearing base 210, or the second positioning mechanism 250 can be arranged on the bearing base 210, or both the first positioning mechanism 240 and the second positioning mechanism 250 can be arranged on the bearing base 210.

[0131] In this way, the first positioning mechanism 240 can be used to adjust the position of the product to be coated along the first direction X, and / or the second positioning mechanism 250 can be used to adjust the position of the product to be coated along the second direction Y, so as to reduce the deviation of the movement of the product to be coated, thereby improving the coating accuracy.

[0132] Please refer to Figure 2 and Figure 6 In some embodiments, the coating platform 200 further comprises a vacuum suction mechanism 260 and a vacuum breaking blowing mechanism 270, and the bearing base 210 is provided with a vacuum hole group 211, and the vacuum suction mechanism 260 and the vacuum breaking blowing mechanism 270 are respectively communicated with the vacuum hole group 211.

[0133] The vacuum suction mechanism 260 can perform vacuumizing operation, and the vacuumizing operation is performed between the bearing base 210 and the product to be coated through the vacuum hole group 211 arranged on the bearing base 210, and the product to be coated is firmly fixed on the bearing base 210 by using the negative pressure effect generated by the vacuum, so as to realize the coating operation of the product to be coated.

[0134] The vacuum breaking blowing mechanism 270 is used to break the vacuum seal formed between the product to be coated and the bearing base 210, so as to quickly release the fixation of the product to be coated.

[0135] In this way, when the coating operation is needed, the product to be coated can be firmly fixed on the bearing base 210 by using the vacuum suction mechanism 260, so as to improve the stability of the coating process and improve the coating quality; after the coating operation is completed, the product to be coated and the bearing base 210 can be blown through the vacuum hole group 211 by using the vacuum breaking blowing mechanism 270 to destroy the vacuum environment, so that the fixation state of the product to be coated can be quickly released, so as to facilitate the rapid feeding and discharging.

[0136] Please refer to Figures 4 to 7 In some embodiments, the coating platform 200 further comprises a linear displacement sensor 280 arranged on the bearing base 210, and the linear displacement sensor 280 is electrically connected to the coating driving mechanism 400, and the linear displacement sensor 280 is used to sense the movement of the coating die 310.

[0137] The linear displacement sensor 280 is a sensor for measuring the position change of an object in a linear direction. In this embodiment, the linear displacement sensor 280 is used to measure the position change of the coating die head 310 in a linear direction. Optionally, the linear displacement sensor 280 can be a grating ruler.

[0138] The linear displacement sensor 280 is disposed on the supporting base 210 , and can be fixedly mounted on the supporting base 210 , for example, by fastener connection, clamping, or the like.

[0139] The linear displacement sensor 280 is arranged on the supporting base 210 and measures the linear movement of the coating die 310. Thus, the linear displacement sensor 280 can measure the parallelism of the coating die 310 relative to the supporting base 210, and the linear displacement sensor 280 can feed back the measurement results to the coating drive mechanism 400 so that the coating drive mechanism 400 can adjust the position of the coating die 310, thereby correcting the parallelism of the coating die 310 relative to the supporting base 210, thereby improving the coating quality of the coating die 310.

[0140] Optionally, in some specific embodiments, a positioning block (not shown in the figure) can also be set on the supporting base 210, and the linear displacement sensor 280 is set on the positioning block; and, in the direction along the third direction Z and toward the coating die 310, the end face of the positioning block is flush with the end face of the supporting base 210.

[0141] The positioning block is used for fixing and assembling the linear displacement sensor 280 .

[0142] It can be understood that along the third direction Z and toward the coating die 310, the end face of the positioning block is flush with the end face of the supporting base 210. Therefore, when the linear displacement sensor 280 is installed on the positioning block, the installation position of the linear displacement sensor 280 has little effect on its measurement of the coating die 310.

[0143] In this way, the linear displacement sensor 280 is installed using a positioning block, and the positioning block is kept flush with the end face of the supporting base 210 in the third direction Z and facing the coating die 310, so as to reduce the probability of deviation in the detection of the coating die 310 due to deviation in the installation position of the linear displacement sensor 280.

[0144] Please refer to Figure 2 、 Figures 4 to 6 In some embodiments, the coating platform 200 further includes a fine-tuning device 290 disposed on the frame 100, wherein the output end of the fine-tuning device 290 faces the supporting base 210, and the fine-tuning device 290 is used to drive the supporting base 210 to move along the third direction Z.

[0145] The fine adjustment device 290 is used to fine adjust the carrier base 210 in the third direction Z; optionally, the fine adjustment device 290 includes but is not limited to a micrometer, a threaded adjustment device, a pneumatic or hydraulic fine adjustment device 290, etc.

[0146] The number of the fine adjustment device 290 can be one or more than one; exemplarily, the fine adjustment device 290 can be a micrometer, and the number of the fine adjustment device 290 can be four, and the four fine adjustment devices 290 can be arranged at the four corners of the carrier base 210, and the four fine adjustment devices 290 are used to adjust the levelness of the carrier base 210.

[0147] In this way, the fine adjustment device 290 is used to further adjust and fine tune the carrier base 210 in the third direction Z, so as to further improve the levelness of the carrier base 210.

[0148] Please refer to Figure 2 , Figure 4 , Figure 5 and Figure 8 In some embodiments, the coating assembly 300 further comprises a gantry mechanism 320, and the coating driving mechanism 400 comprises a first driving unit 410 and a second driving unit 420; the first driving unit 410 is arranged on the rack 100, and the first driving unit 410 is drivingly connected to the gantry mechanism 320 and is used to drive the gantry mechanism 320 to move along the first direction X; the second driving unit 420 is arranged on each gantry mechanism 320, and the second driving unit 420 is drivingly connected to the coating die head 310 and is used to drive the coating die head 310 to move along the third direction Z.

[0149] The gantry mechanism 320 is used to mount and support the second driving unit 420 and the coating die head 310. The gantry mechanism 320 is movably arranged on the rack 100, so that the first driving unit 410 can drive the gantry mechanism 320 to move along the first direction X on the rack 100, and then the coating die head 310 can move along the first direction X synchronously with the gantry mechanism 320, so as to achieve the purpose of coating operation.

[0150] In some embodiments, the gantry mechanism 320 can comprise a gantry 321 and a moving base 322, the gantry 321 is fixed on the moving base 322, and the first driving unit 410 is drivingly connected to the moving base 322.

[0151] The moving base 322 includes but is not limited to a marble base, an alloy base, a stainless steel base, and a base made of various materials. The moving base 322 is used to support the gantry 321.

[0152] The gantry 321 is fixed on the moving base 322 and is used to support the second driving unit 420, the coating die 310 and other structures. Exemplarily, the gantry 321 can be fixed on the moving base 322 by fasteners such as high-strength bolts, screws and the like. The gantry 321 can include two upright columns and a cross beam arranged on the two upright columns.

[0153] The first driving unit 410 includes but is not limited to a driving cylinder, a driving hydraulic cylinder, a roller screw driving pair, a guide rail sliding block driving pair and the like. The number of the first driving unit 410 can be one group or any multiple groups of more than one group. The first driving unit 410 is used to drive the gantry mechanism 320 to reciprocate along the first direction X.

[0154] In some specific embodiments, the first driving unit 410 can include a first driving mechanism 411 and a first guide structure 412. The first guide structure 412 is arranged on the rack 100 along the first direction X. Each gantry mechanism 320 is slidingly arranged on the first guide structure 412. The first driving mechanism 411 is drivingly connected to each gantry mechanism 320 and drives each gantry mechanism 320 to move along the first direction X.

[0155] The first driving mechanism 411 includes but is not limited to a driving cylinder, a driving hydraulic cylinder, a driving motor and the like. The first guide structure 412 includes but is not limited to a guide rail, a guide rail bearing, a guide groove and the like.

[0156] Exemplarily, the first driving mechanism 411 can be a high-precision linear motor. The first guide structure 412 can be a high-precision guide rail. The number of the coating assembly 300 is two groups. The gantry mechanisms 320 of the two groups of coating assemblies 300 are respectively slidingly connected to the high-precision guide rails. The high-precision linear motor is drivingly connected to the two gantry mechanisms 320 and can respectively drive the two gantry mechanisms 320 to reciprocate along the first direction X.

[0157] The second driving unit 420 includes but is not limited to a driving cylinder, a driving hydraulic cylinder, a roller screw driving pair, a guide rail sliding block driving pair and the like. The number of the second driving unit 420 can be one group or any multiple groups of more than one group. The second driving unit 420 is used to drive the coating die 310 to reciprocate along the third direction Z.

[0158] In some specific embodiments, the second driving unit 420 can include a second driving mechanism 421 and a second guide structure 422. The second guide structure 422 is arranged on each gantry mechanism 320 along the third direction Z. The coating die 310 is slidingly arranged on the corresponding second guide structure 422. The second driving mechanism 421 is drivingly connected to the corresponding coating die 310 and drives the coating die 310 to move along the third direction Z.

[0159] The second driving mechanism 421 includes, but is not limited to, a driving cylinder, a driving hydraulic cylinder, a driving motor, etc.; and the second guiding structure 422 includes, but is not limited to, a guide rail, a guide rail bearing, a guide groove, etc.

[0160] Exemplarily, the second driving mechanism 421 can be a servo motor, and the second guiding structure 422 can be a grinding grade ball screw; each gantry mechanism 320 is provided with a servo motor and a drivingly connected grinding grade ball screw at opposite ends in the second direction Y, and the coating die head 310 can be directly connected or connected through a connecting structure (such as a cross beam, etc.) to the moving end of the grinding grade ball screw at the opposite ends of the corresponding gantry mechanism 320, so that the servo motors at the opposite ends can drive the corresponding grinding grade ball screws and simultaneously drive the coating die head 310 to move along the third direction Z.

[0161] In this way, the first driving unit 410 can drive the gantry mechanism 320 to move along the first direction X, and the second driving unit 420 provided on the gantry mechanism 320 can drive the coating die head 310 to move along the third direction Z, so that the coating die head 310 of each group of coating assemblies 300 can move to perform a coating operation.

[0162] Please refer to Figure 2 , Figure 4 and Figure 5 In some embodiments, the opposite sides of the rack 100 in the second direction Y are provided with the first driving unit 410; and / or the opposite sides of each gantry mechanism 320 in the second direction Y are provided with the second driving unit 420.

[0163] In this way, the opposite sides of the rack 100 in the second direction Y are provided with the first driving unit 410, and two groups of first driving units 410 are used to simultaneously drive the gantry mechanism 320, which can effectively improve the control accuracy and response time of the gantry mechanism 320; the opposite sides of the gantry mechanism 320 in the second direction Y are provided with the second driving unit 420, and two groups of second driving units 420 are used to simultaneously drive the coating die head 310, which can effectively improve the control accuracy and response time of the gantry mechanism 320.

[0164] Please refer to Figure 2 , Figure 4 and Figure 5 In some embodiments, the coating driving mechanism 400 further comprises a first position sensor (not shown in the figure) and a first displacement sensor 440, the first position sensor and the first displacement sensor are electrically connected to the first driving unit 410, and the first position sensor and the first displacement sensor 440 are used to sense the position of the coating die head 310 in the first direction X.

[0165] The first position sensor is used to measure the specific position of the coating die 310 in the first direction X.

[0166] The first displacement sensor 440 is used to measure the displacement or movement of the coating die 310 in the first direction X.

[0167] In this way, the first position sensor can be used to detect whether the movement of the coating die 310 in the first direction X is in place, and the first displacement sensor 440 can be used to detect the displacement amount of the coating die 310, and the detection results of the first position sensor and the first displacement sensor 440 are fed back to the first driving unit 410 to realize the closed-loop control of the gantry mechanism 320 and the coating die 310 by the first driving unit 410.

[0168] Optionally, in some embodiments, the second driving unit 420 can further include an auxiliary guide rail 423, an auxiliary sliding block 424 and an auxiliary cylinder 425, the auxiliary guide rail 423 is arranged on each gantry mechanism 320 along the third direction Z, the auxiliary sliding block 424 is slidingly arranged on the auxiliary guide rail 423, the coating die 310 is connected to the auxiliary sliding block 424, and the output end of the auxiliary cylinder 425 is connected to the coating die 310 along the third direction Z.

[0169] The number of auxiliary guide rails 423 can be one or any multiple of more than one, and each auxiliary guide rail 423 is arranged along the third direction Z. The auxiliary guide rail 423 can be fixedly installed on the gantry mechanism 320 by screwing, fastening or the like.

[0170] One or any multiple of more than one auxiliary sliding block 424 can be slidingly arranged on each auxiliary guide rail 423, and the coating die 310 is connected to the auxiliary sliding block 424, so that the coating die 310 can slide synchronously with the auxiliary sliding block 424 on the auxiliary guide rail 423.

[0171] The output end of the auxiliary cylinder 425 is connected to the coating die 310 along the third direction Z, so that the auxiliary cylinder 425 can drive the coating die 310 to reciprocate along the third direction Z through the output end.

[0172] In this way, the auxiliary cylinder 425 can act on the coating die 310 to offset the influence of the self-weight of the coating die 310 in the third direction Z, reduce the load of the second driving mechanism 421, and improve the precision of the second driving mechanism 421.

[0173] Please refer to Figure 2 , Figure 4 , Figure 5 and Figure 8In some embodiments, the coating driving mechanism 400 further comprises a second position sensor 450 and a second displacement sensor 460, which are electrically connected to the second driving unit 420, and are used to sense the position of the coating die 310 in the third direction Z.

[0174] The second position sensor 450 is used to measure the specific position of the coating die 310 in the third direction Z.

[0175] The second displacement sensor 460 is used to measure the displacement or movement of the coating die 310 in the third direction Z.

[0176] In this way, the second position sensor 450 can be used to detect whether the movement of the coating die 310 in the third direction Z is in place, and the second displacement sensor 460 can be used to detect the displacement amount of the coating die 310 in the third direction Z, and the detection results of the second position sensor 450 and the second displacement sensor 460 are fed back to the second driving unit 420, so as to realize the closed-loop control of the gantry mechanism 320 and the coating die 310 by the second driving unit 420.

[0177] Please refer to Figure 2 , Figure 4 , Figure 5 and Figure 8 In some embodiments, the coating driving mechanism 400 further comprises a three-dimensional displacement sensor 470, which is electrically connected to the first driving unit 410 and the second driving unit 420, and is used to sense the coating die 310.

[0178] The three-dimensional displacement sensor 470 is used to measure the relative position change of the coating die 310 in the three-dimensional space, and the three-dimensional displacement sensor 470 can feed back the electrical signal to the first driving unit 410 and the second driving unit 420, so that the first driving unit 410 and the second driving unit 420 can correct the current position of the coating die 310.

[0179] In this way, the three-dimensional displacement sensor 470 is used to detect the current position of the coating die 310, so as to further improve the movement accuracy of the coating die 310.

[0180] Please refer to Figures 2 to 5 In some embodiments, the coating driving mechanism 400 further comprises a thickness detection sensor 480, which is electrically connected to the second driving unit 420, and is used to sense the thickness of the product to be coated.

[0181] The thickness detection sensor 480 is configured to detect the thickness of the product to be coated, and to feed an electrical signal to the second driving unit 420.

[0182] In this way, the second driving unit 420 can adjust the position of the coating die 310 according to the thickness detected by the thickness detection sensor 480, so as to adjust the distance between the coating die 310 and the product to be coated in the third direction Z, reduce the influence of the thickness of the product to be coated on the distance between the coating die 310 and the product to be coated, and thus improve the coating quality of the coating die 310.

[0183] For reference Figures 9 to 11 In some embodiments, the coating die 310 is internally formed with a first cavity 311 and a second cavity 312 in communication with each other, and the coating die 310 is provided with a feeding port 313 communicating with the first cavity 311 and a lip 314 communicating with the second cavity 312; in the third direction Z, the first cavity 311 is located above the second cavity 312; in the extension direction of the first cavity 311 and away from the feeding port 313, the height of the first cavity 311 in the third direction Z decreases.

[0184] The first cavity 311 and the second cavity 312 are both hollow structures inside the coating die 310; the first cavity 311 and the second cavity 312 are used for the flow of coating material.

[0185] The feeding port 313 is in communication with the first cavity 311, so that the coating material introduced from outside for coating operation can be introduced into the first cavity 311 from the feeding port 313 and flow into the second cavity 312 according to its own gravity.

[0186] The lip 314 of the coating die 310 is in communication with the second cavity 312, so that the coating material in the second cavity 312 can flow out from the lip 314 and be used for coating on the product to be coated.

[0187] The extension direction of the first cavity 311 refers to the direction in which the first cavity 311 extends in the length direction of the coating die 310. In this embodiment, the length direction of the coating die 310 can be arranged along the second direction Y, so that the extension direction of the first cavity 311 and the second cavity 312 formed in the coating die 310 can also be towards the second direction Y.

[0188] The paint is introduced into the first cavity 311 from the feed port 313, and then flows into the second cavity 312 according to its own gravity, and the paint diffuses along the extension direction of the first cavity 311 and flows into the second cavity 312 at the same time; it should be understood that in the extension direction of the first cavity 311 and away from the direction of the feed port 313, the paint flows into the second cavity 312 along the third direction Z at a slower rate, in order to make the paint flow into the second cavity 312 more uniformly, in the extension direction of the first cavity 311 and away from the direction of the feed port 313, the height of the first cavity 311 in the third direction Z can be set to be in a decreasing trend, that is, the height of the first cavity 311 at the feed port 313 is the highest, and the height of the first cavity 311 at both ends in the extension direction is the lowest, so as to improve the flow uniformity of the paint flowing into the second cavity 312 in the extension direction of the first cavity 311, so that the film thickness uniformity of the paint flowing out of the lip 314 is better.

[0189] Exemplarily, the cross-sectional view of the first cavity 311 can be a combination of a triangular cross-section and a rectangular cross-section, the triangular cross-section is formed at the top of the rectangular cross-section, and the feed port 313 can be located at the top corner of the triangular cross-section; as shown in Figure 9

[0190] Optionally, in some specific embodiments, a bubble discharge port 315 can also be provided on the coating die 310, and the bubble discharge port 315 is communicated to the first cavity 311.

[0191] The bubble discharge port 315 is provided on the coating die 310 and is used to discharge the bubbles generated in the paint. The number of bubble discharge ports 315 can be one or any number of more than one, such as two, three, etc.

[0192] It can be understood that the bubble discharge principle of the bubble discharge port 315 is to introduce the paint through the feed port 313, then discharge the paint through the bubble discharge port 315, and use the feed port 313 and the bubble discharge port 315 to circulate the paint to be introduced and discharged, so that the bubbles can be gathered and discharged, thereby improving the coating quality of the coating die 310.

[0193] Please refer to Figures 9 to 11 In some embodiments, the coating die 310 is provided with a fine adjustment screw 330, and the fine adjustment screw 330 is used to adjust the slit thickness of the lip 314.

[0194] It can be understood that the lip 314 is used to discharge the paint outside the coating die 310 for the coating operation of the coating die 310 using the paint.

[0195] ​In this way, by arranging the fine adjustment screw 330 on the coating die 310, the fine adjustment screw 330 is used to clamp or loosen the lip 314 to adjust the slit thickness of the lip 314, thereby adjusting the thickness of the coating discharged by the lip 314 to improve the film thickness uniformity along the direction of the lip 314, thereby improving the coating quality.

[0196] Optionally, the coating die 310 can also be provided with a collision prevention structure 340, which is directed towards the product to be coated.

[0197] The collision prevention structure 340 includes but is not limited to a collision prevention block, a collision prevention strip, a collision prevention plate, a collision prevention rod, and the like.

[0198] When the coating die 310 is coated along the first direction X and towards the product to be coated, the collision prevention structure 340 can first sweep over the product to be coated, so that in the case of a high-height foreign object on the product to be coated, the collision prevention structure 340 can push the foreign object away to reduce the impact of the foreign object on the coating quality. At the same time, during the movement of the coating die 310 along the third direction Z, the collision prevention structure 340 can also reduce the risk of the lip 314 being impacted.

[0199] It should be understood that in the third direction Z and towards the product to be coated, the end of the collision prevention structure 340 does not exceed the end of the coating die 310, so that the collision prevention structure 340 has less impact on the coating operation of the coating die 310.

[0200] Exemplarily, in some specific embodiments, when the coating assembly 300 has two groups, the two groups of coating assemblies 300 are respectively located on opposite sides in the first direction X, so that the coating dies 310 of the two groups of coating assemblies 300 are also on opposite sides in the first direction X and can perform coating operations along the first direction X; the collision prevention structures 340 are arranged on the opposite sides of the two coating dies 310, so that during the coating operation of the two coating dies 310 towards the product to be coated between them, the collision prevention structures 340 can first sweep over the product to be coated and push away the high-height foreign objects present, to improve the coating quality of the coating dies 310.

[0201] Please refer to Figure 4 , Figure 5 and Figure 10 In some embodiments, the coating device 1000 further comprises a cleaning and pre-coating assembly 500, and the cleaning and pre-coating assembly 500 is arranged on opposite sides of the coating platform 200 in the second direction Y.

[0202] The cleaning and pre-coating assembly 500 is used for cleaning and pre-coating treatment of the coating die 310 to improve the coating quality of the coating die 310.

[0203] The cleaning and pre-coating assembly 500 is arranged on opposite sides of the coating platform 200 in the second direction Y, so that when the coating die 310 performs coating on the product to be coated on the coating platform 200 in any side direction in the second direction Y, the cleaning and pre-coating operation of the cleaning and pre-coating assembly 500 can be performed.

[0204] In this way, before the coating operation is performed, the cleaning and pre-coating operation of the cleaning and pre-coating assembly 500 can be performed on the coating die 310 to improve the cleanliness of the coating die 310, thereby improving the coating quality.

[0205] Please refer to Figure 4 , Figure 10 and Figure 12 In some embodiments, the cleaning and pre-coating assembly 500 includes a pre-coating structure 510 arranged on the rack 100, and the pre-coating structure 510 is used for pre-coating the coating die 310.

[0206] The pre-coating structure 510 is used for pre-coating the coating die 310 before the coating operation is performed on the product to be coated, so as to improve the liquid output effect of the lip 314 of the coating die 310.

[0207] The pre-coating structure 510 includes but is not limited to a pre-coating plate, a pre-coating roller, and the like.

[0208] In this way, the pre-coating structure 510 is used for pre-coating the coating die 310, so as to improve the liquid output effect of the lip 314 of the coating die 310, thereby improving the coating quality.

[0209] Please refer to Figure 4 , Figure 10 and Figure 12 In some embodiments, the cleaning and pre-coating assembly 500 includes a first scraper 511 and a first horizontal movement driving mechanism 512 arranged on the rack 100, and the first horizontal movement driving mechanism 512 is connected to the first scraper 511 and is used for driving the first scraper 511 to scrape along the pre-coating structure 510.

[0210] The first horizontal movement driving mechanism 512 includes but is not limited to a driving cylinder, a driving hydraulic cylinder, a linear motor, and the like.

[0211] Optionally, the first horizontal movement driving mechanism 512 can drive the first scraper 511 to move in the first direction X or the second direction Y, so that the first scraper 511 can sweep the pre-coating structure 510 and scrape the pre-coating structure 510.

[0212] The first scraper 511 can be a soft scraper or a hard scraper, or the first scraper 511 can be formed by a combination of a soft scraper and a hard scraper, for example, the soft scraper performs the scraping operation to reduce the damage to the pre-coating structure 510.

[0213] In this way, the first horizontal movement driving mechanism 512 can drive the first scraper 511 to scrape along the pre-coating structure 510, so that the first scraper 511 can remove the impurity coating on the pre-coating structure 510, to facilitate the normal operation of the subsequent pre-coating operation.

[0214] Optionally, a waste slot can also be arranged on the side of the pre-coating structure 510 to collect the waste removed by the first scraper 511 from the pre-coating structure 510.

[0215] Please refer to Figure 4 , Figure 10 and Figure 13 In some embodiments, the cleaning pre-coating assembly 500 includes a liquid immersion tank 520 arranged on the rack 100, and the liquid immersion tank 520 is used for the coating die 310 to immerse.

[0216] The liquid immersion tank 520 is used to contain the coating, so that the coating die 310 can be moved to be inserted into the liquid immersion tank 520 and immersed in the coating to achieve cleaning and immersion of the coating die 310.

[0217] Optionally, the end surface of the rack 100 can be provided with the liquid immersion tank 520; or the main structure forming the liquid immersion tank 520 can be fixedly installed on the rack 100.

[0218] The length direction of the liquid immersion tank 520 can be arranged along the second direction Y, so that the coating die 310 can be smoothly moved into the liquid immersion tank 520.

[0219] In this way, in the case of long-term shutdown, the coating die 310 can be immersed in the liquid immersion tank 520 to keep wet, or in the coating operation, the coating die 310 can be moved into the liquid immersion tank 520 for immersion to improve the coating effect of the subsequent coating operation.

[0220] Optionally, in some specific embodiments, the slot end of the liquid immersion tank 520 is surrounded by a sealing compression strip 521, and the inner wall of the liquid immersion tank 520 is provided with a liquid supply hole 522 and an overflow hole 523.

[0221] The sealing compression strip 521 can be a sealing rubber strip, a sealing gasket, or the like.

[0222] The liquid supply hole 522 is used for the coating to be introduced into the liquid immersion tank 520; the number of the liquid supply hole 522 can be one or more than one.

[0223] The overflow holes 523 are used for discharging the coating material out of the immersion tank 520, and the number of the overflow holes 523 can be one or more.

[0224] When the coating die 310 is moved to be partially inserted into the immersion tank 520 for immersion, the outer edge of the coating die 310 can be pressed on the sealing strip 521, so that the immersion tank 520 is sealed, and the probability of impurities and foreign matters in the external environment entering the immersion tank 520 and affecting the coating die 310 is reduced. At the same time, the liquid supply holes 522 can be used to supply the coating material into the immersion tank 520, and the overflow holes 523 can be used to discharge the coating material.

[0225] Please refer to Figure 4 , Figure 10 , Figure 13 and Figure 14 In some embodiments, the immersion tank 520 is provided with a die lip cleaning assembly 530 for cleaning the lip 314 of the coating die 310.

[0226] The die lip cleaning assembly 530 is used for cleaning the coating die 310 to reduce the crystalline substances on the surface of the coating die 310.

[0227] In this way, the coating die 310 can be cleaned by the die lip cleaning assembly 530 to improve the coating quality of the coating die 310.

[0228] Please refer to Figure 4 , Figure 10 , Figure 13 and Figure 14 In some embodiments, the die lip cleaning assembly 530 includes a second scraper 531, a second transverse driving mechanism 532, and a propulsion mechanism 533, the propulsion mechanism 533 is drivingly connected to the second scraper 531 and is used to drive the second scraper 531 to move along the first direction X, and the second transverse driving mechanism 532 is drivingly connected to the propulsion mechanism 533 and is used to drive the propulsion mechanism 533 to move along the second direction Y.

[0229] The propulsion mechanism 533 is used to drive the second scraper 531 to move along the first direction X, so that the second scraper 531 can be moved to the coating die 310. The propulsion mechanism 533 can be a driving structure of a push cylinder or a push hydraulic cylinder.

[0230] Optionally, the second transverse driving mechanism 532 includes but is not limited to a driving cylinder, a driving hydraulic cylinder, a linear motor, or the like driving structure. The second transverse driving mechanism 532 can drive the propulsion mechanism 533 and the second scraper 531 to move along the second direction Y, so that the second scraper 531 can scrape and clean the coating die 310.

[0231] In this way, the second scraper 531 can be moved along the first direction X by the pushing mechanism 533, and the pushing mechanism 533 and the second scraper 531 can be moved along the second direction Y by the second transverse driving mechanism 532, so that the second scraper 531 can scrape the crystalline substance on the lip 314 of the coating die 310.

[0232] Please refer to Figure 10 and Figure 14 In some embodiments, the second scraper 531 is recessed to form a scraping groove 5311 for inserting the coating die 310, and the groove wall of the scraping groove 5311 abuts against the surface of the coating die 310.

[0233] For example, the cross-sectional view of the scraping groove 5311 can be in a "V" shape structure, an arc structure, etc. The groove wall of the scraping groove 5311 is used to abut against the surface of the coating die 310, so that when the second scraper 531 moves along the second direction Y, the groove wall of the scraping groove 5311 can scrape the crystalline substance on the surface of the coating die 310.

[0234] In this way, the groove wall of the scraping groove 5311 is used to scrape the crystalline substance on the abutting surface of the coating die 310, which can more comprehensively clean the surface of the coating die 310.

[0235] Please refer to Figure 10 and Figure 14 In some embodiments, the die lip cleaning assembly 530 further comprises a spraying device (not shown in the figure), and a cleaning gas nozzle 534 of the spraying device is arranged on the second scraper 531.

[0236] It should be understood that the cleaning gas nozzle 534 of the spraying device is used to spray cleaning liquid or gas.

[0237] Optionally, the cleaning gas nozzle 534 can spray gas or liquid towards the second scraper 531; or the cleaning gas nozzle 534 can spray gas or liquid towards the lip 314 of the coating die 310; or the cleaning gas nozzle 534 can spray gas or liquid towards the second scraper 531 and the lip 314 of the coating die 310 at the same time, so as to simultaneously spray gas or liquid towards the second scraper 531 and the lip 314 of the coating die 310.

[0238] In this way, the cleaning gas nozzle 534 can be used to spray and clean the surface of the coating die 310 or the surface of the second scraper 531.

[0239] For example, in some specific embodiments, a cleaning tank 535 can also be arranged on the rack 100, as Figure 5 shown, the cleaning tank 535 is used to contain cleaning liquid to provide cleaning liquid for the spraying device.

[0240] Please refer to Figure 5 , Figure 15 and Figure 16 In some embodiments, the coating assembly 300 further comprises a supply unit 350, which comprises a liquid injection mechanism 351 and a liquid supply structure 352 connected to the coating die 310 through the liquid injection mechanism 351.

[0241] The liquid supply structure 352 can be used to supply coating materials; optionally, the liquid supply structure 352 includes but is not limited to a container such as a tank, a bottle, a box, etc. The number of liquid supply structures 352 can be one or more than one.

[0242] The liquid injection mechanism 351 is used to inject the coating material in the liquid supply structure 352 into the coating die 310 for the coating die 310 to perform coating operation using the coating material. The liquid injection mechanism 351 can be a driving structure such as a pump body structure. For example, in some specific embodiments, the liquid injection mechanism 351 can adopt a pump body structure such as a syringe pump, a liquid supply pump, etc.

[0243] In this way, the liquid injection mechanism 351 can inject the coating material in the liquid supply structure 352 into the coating die 310 for the coating die 310 to perform normal coating operation.

[0244] Please refer to Figure 5 , Figures 15 to 17 In some embodiments, the liquid supply structure 352 comprises a liquid supply tank 3522 and a liquid storage tank 3521, the liquid storage tank 3521 is provided with a pressurizing pipeline 35211, a pressure relief pipeline 35212 and a liquid outlet pipeline 35213, the liquid storage tank 3521 is connected to the liquid supply tank 3522 through the liquid outlet pipeline 35213; the liquid supply tank 3522 is provided with a diaphragm valve 35221 and a liquid supply pipeline 35222, and the liquid supply tank 3522 is connected to the liquid injection mechanism 351 through the liquid supply pipeline 35222.

[0245] The liquid storage tank 3521 is used for storing coating materials; the liquid storage tank 3521 is provided with a pressurizing pipeline 35211, a pressure relief pipeline 35212 and a liquid outlet pipeline 35213, the pressurizing pipeline 35211 and the pressure relief pipeline 35212 can be used to adjust the air pressure in the liquid storage tank 3521, and the liquid outlet pipeline 35213 can be used to guide the coating material into the liquid supply tank 3522.

[0246] The liquid supply tank 3522 is used to cooperate with the liquid injection mechanism 351 and inject coating material into the coating die 310 for the coating operation of the coating die 310.

[0247] The liquid supply tank 3522 is provided with a diaphragm valve 35221 and a liquid supply pipeline 35222. The diaphragm valve 35221 is used to control the communication and separation between the liquid supply tank 3522 and the external environment, and the liquid supply pipeline 35222 is used to supply paint to the liquid injection mechanism 351.

[0248] It can be understood that, when the diaphragm valve 35221 is closed, a constant pressure environment with a certain air pressure is formed in the liquid supply tank 3522. When the liquid injection mechanism 351 draws paint through the liquid supply pipeline 35222 and injects it into the coating die 310, the liquid level in the liquid supply tank 3522 will drop, and a negative pressure will be formed in the liquid supply tank 3522. Therefore, the liquid supply tank 3522 can draw paint from the liquid storage tank 3521 through the liquid outlet pipeline 35213, so that the liquid level in the liquid supply tank 3522 remains unchanged, and thus there is enough paint in the liquid supply tank 3522 for the coating of the coating die 310.

[0249] Please refer to Figure 5 , Figure 16 and Figure 17 In some embodiments, the outlet end of the liquid outlet pipeline 35213 is higher than the outlet end of the liquid supply pipeline 35222.

[0250] In this way, because the density of the bubbles is lower than the density of the paint, when the bubbles are generated, the bubbles will float on the surface of the paint. Since the outlet end of the liquid supply pipeline 35222 is lower, the probability of the bubbles entering the liquid supply pipeline 35222 is low, and thus the probability of the paint containing bubbles introduced into the coating die 310 is also low, and the coating quality is effectively improved.

[0251] Optionally, in some specific embodiments, the liquid outlet pipeline 35213 is provided with a empty pipeline detection sensor (not shown in the figure), and the liquid supply tank 3522 is provided with a liquid level sensor 35223. The liquid supply pipeline 35222 is provided with a filter (not shown in the figure).

[0252] The empty pipeline detection sensor is used to detect the liquid outlet pipeline 35213 to detect the situation that the liquid supply tank 3522 cannot continue to be supplied with paint due to insufficient paint in the liquid storage tank 3521.

[0253] The liquid level sensor 35223 is used to monitor the liquid level of the paint in the liquid supply tank 3522 to reduce the probability of affecting the coating operation due to insufficient paint in the liquid supply tank 3522. It can be understood that, when the liquid level sensor 35223 detects that the paint in the liquid supply tank 3522 drops to a preset position and the empty pipeline detection sensor does not provide a prompt, it indicates that the empty pipeline detection sensor is malfunctioning.

[0254] The filter is used to filter the paint flowing through the liquid supply pipeline 35222 to remove impurities in the paint and reduce the impact of the impurities on the coating quality.

[0255] In this way, the empty pipe detection sensor can detect the liquid outlet pipe 35213, and the liquid level sensor 35223 can detect the liquid level in the liquid supply tank 3522. Meanwhile, a filter is arranged on the liquid supply pipe 35222 to reduce the probability of impurities being introduced from the liquid supply pipe 35222 to the coating die 310, thereby improving the coating quality.

[0256] Please refer to Figure 5 , Figures 15 to 17 In some embodiments, the supply unit 350 can further include a chemical liquid valve pipe system 353, a pneumatic control valve 354, a pressure regulating valve 355, and a pipe pressure regulating monitoring device 356. The chemical liquid valve pipe system 353 is connected to the liquid supply structure 352, and the pneumatic control valve 354, the pressure regulating valve 355, and the pipe pressure regulating monitoring device 356 are arranged on the chemical liquid valve pipe system 353.

[0257] The chemical liquid valve pipe system 353 is used to control the flow and distribution of fluids such as paint, cleaning liquid, and cleaning gas. The chemical liquid valve pipe system 353 includes various types of valves, pipes, connectors, and controllers.

[0258] The pneumatic control valve 354 is used to control the flow of fluid in the chemical liquid valve pipe system 353 through air pressure.

[0259] The pressure regulating valve 355 is used to control the fluid pressure in the chemical liquid valve pipe system 353.

[0260] The pipe pressure regulating monitoring device 356 is used to monitor and regulate the fluid pressure in the chemical liquid valve pipe system 353 to ensure that the chemical liquid valve pipe system 353 operates within a safe and effective pressure range.

[0261] In this way, the chemical liquid valve pipe system 353 can be connected to the liquid supply structure 352 to allow the chemical liquid valve pipe system 353 to import or export paint in the liquid supply structure 352. Meanwhile, the pneumatic control valve 354, the pressure regulating valve 355, and the pipe pressure regulating monitoring device 356 can be used to adjust and monitor the opening and pressure of the chemical liquid valve pipe system 353.

[0262] Please refer to Figure 4 and Figure 5 In some embodiments, the coating device 1000 further includes an air knife mechanism 600 arranged on the coating die 310, and the air outlet of the air knife mechanism 600 faces the product to be coated.

[0263] The air knife mechanism 600 is used to control the output direction and speed of the air.

[0264] The air knife mechanism 600 is arranged on the coating die 310. Optionally, the air knife mechanism 600 can be arranged on any side of the coating die 310. For example, the air knife mechanism can be arranged on the side of the coating die 310 away from the coating platform 200 along the first direction X.

[0265] The air outlet of the air knife mechanism 600 faces the product to be coated. Thus, the air knife mechanism can move synchronously with the coating die 310 and perform the air blowing operation on the product to be coated synchronously.

[0266] In this way, the air knife mechanism 600 can be used to quickly dry the coating on the surface of the product to be coated, helping the coating to solidify and cure quickly. At the same time, the air knife mechanism 600 can also adjust the thickness of the coating film formed by controlling the speed and direction of the airflow, so as to improve the uniformity of the coating.

[0267] For example, the length of the air outlet of the air knife mechanism 600 along the second direction Y is greater than or equal to the length h of the coating die 310. Figure 5 Figure 9 Optionally, in some specific embodiments, the length of the air outlet of the air knife mechanism 600 along the second direction Y is greater than or equal to the length h of the coating die 310.

[0268] In this way, the air outlet of the air knife mechanism 600 can completely perform the air blowing operation on the range coated by the coating die 310, so as to guarantee the effect of the air knife mechanism 600.

[0269] For example, the length of the air outlet of the air knife mechanism 600 along the second direction Y is greater than or equal to the length h of the coating die 310. Figure 5 In some embodiments, the air knife mechanism 600 is provided with a first adjusting mechanism 610, a second adjusting mechanism 620, and an angle adjusting mechanism 630. The first adjusting mechanism 610 is used to adjust the position of the air outlet along the first direction X. The second adjusting mechanism 620 is used to adjust the position of the air outlet along the third direction Z. The angle adjusting mechanism 630 is used to adjust the included angle between the air outlet and the third direction Z.

[0270] The first adjusting mechanism 610 includes but is not limited to a threaded adjusting device, a sliding guide device, a pneumatic / hydraulic adjusting device, etc. The first adjusting mechanism 610 is used to adjust the position of the air outlet along the first direction X.

[0271] The second adjusting mechanism 620 includes but is not limited to a threaded adjusting device, a sliding guide device, a pneumatic / hydraulic adjusting device, etc. The second adjusting mechanism 620 is used to adjust the height of the air outlet along the third direction Z.

[0272] For example, the second adjusting mechanism 620 can be a threaded adjusting device. The threaded adjusting device includes a hand wheel, a screw rod, and a nut. By rotating the hand wheel manually, the screw rod is rotated, thereby driving the nut to move along the thread. The air outlet of the air knife mechanism 600 is connected to the nut, so as to realize the position adjustment of the air outlet.

[0273] ​The third adjusting mechanism includes, but is not limited to, a knob fine adjustment device 290, a screw lifting fine adjustment device 290, a gear transmission fine adjustment device 290, etc.; the third adjusting mechanism is used for adjusting the included angle between the air outlet and the third direction Z.

[0274] In this way, the first adjusting mechanism 610, the second adjusting mechanism 620 and the angle adjusting mechanism 630 can be used to adjust the air outlet position of the air knife mechanism 600 to adjust the blowing effect of the air knife mechanism 600.

[0275] Please refer to Figures 2 to 5 In some embodiments, the coating device 1000 further comprises a liquid spreading monitoring mechanism 700, which is arranged on the coating die 310, and the output end of the liquid spreading monitoring mechanism 700 faces the product to be coated.

[0276] The liquid spreading monitoring mechanism 700 is used for monitoring the coating condition of the product to be coated.

[0277] Optionally, the liquid spreading monitoring mechanism 700 can be a high-definition high-resolution black-and-white line-scan camera or a macro camera, etc., and the detection width of the liquid spreading monitoring mechanism 700 can be set to be consistent with the width of the product to be coated along the second direction Y; thus, the liquid spreading monitoring mechanism 700 can be synchronized with the movement of the coating die 310 and fully monitor the product to be coated.

[0278] In this way, the liquid spreading monitoring mechanism 700 can be used to monitor the coating condition of the product to be coated, and the liquid spreading monitoring mechanism 700 is arranged on the coating die 310, so that the liquid spreading monitoring mechanism 700 can move synchronously with the coating die 310 for monitoring and shooting.

[0279] Please refer to Figures 2 to 5 In some embodiments, the coating device 1000 further comprises a controller (not shown in the figure), which is electrically connected to the coating platform 200 and the coating driving mechanism 400.

[0280] The controller can be a single-chip microcomputer, a programmable logic controller, etc. For example, the controller can be a man-machine interaction system.

[0281] The controller is used for electrically controlling the coating platform 200 and the coating driving mechanism 400, so as to realize the position adjustment of the product to be coated by the coating platform 200 and the movement and coating operation of the coating die 310 controlled by the coating driving mechanism 400.

[0282] In this way, the controller can be used to electrically control the coating platform 200 and the coating driving mechanism 400, so as to improve the automation degree of the coating device 1000.

[0283] For example, in some specific embodiments, the controller can include a manufacturing execution system (MES) and a human-machine interaction system, which is integrated with the MES to realize real-time data uploading and remote monitoring functions.

[0284] For example, in some specific embodiments, the controller can include a manufacturing execution system (MES) and a human-machine interaction system, which is integrated with the MES to realize real-time data uploading and remote monitoring functions. Figure 2 In some embodiments, the bottom of the rack 100 is provided with a buffer structure 110.

[0285] The buffer structure 110 is used for buffering and damping the rack 100; optionally, the buffer structure 110 includes but is not limited to a wedge-shaped buffering and damping mechanism, a spring buffering mechanism, a damping gasket, etc.

[0286] In this way, the stability of the rack 100 is improved by the buffer structure 110, thereby improving the stability of the coating operation and improving the coating effect.

[0287] For example, in some specific embodiments, the controller can include a manufacturing execution system (MES) and a human-machine interaction system, which is integrated with the MES to realize real-time data uploading and remote monitoring functions. Figure 1 and Figure 2 In some embodiments, the coating device 1000 further includes a glove box 800, which covers the coating platform 200.

[0288] The glove box 800 is used to cover the coating platform 200, so that the product to be coated on the coating platform 200 can be in a water-free and oxygen-free environment in the glove box 800, thereby reducing the influence of the external environment on the coating effect and improving the coating quality.

[0289] It can be understood that the glove box 800 includes a box body, an observation window, a touch screen, a welding glove port, a transition shelter, a maintenance door, a lighting lamp, a water and oxygen detection system, a vacuum pump, etc.

[0290] In this way, the glove box 800 can be used to cover the coating platform 200, so that the coating operation is performed in the glove box 800, thereby improving the coating environment and improving the coating quality.

[0291] In the following, the coating device 1000 provided by the embodiments of the present application will be described in detail in combination with specific embodiments.

[0292] For example, in some specific embodiments, the controller can include a manufacturing execution system (MES) and a human-machine interaction system, which is integrated with the MES to realize real-time data uploading and remote monitoring functions. Figures 1 to 17 In the present embodiment, the coating device 1000 includes a rack 100, a coating platform 200, a coating assembly 300, and a coating driving mechanism 400.

[0293] The coating platform 200 comprises a base driving mechanism 220, a bearing base 210 connected to the base driving mechanism 220, and a substrate lifting mechanism 230 mounted on the bearing base 210; the base driving mechanism 220 is used to drive the bearing base 210 to move up and down along the third direction Z, and the substrate lifting mechanism 230 is used to support and lift the product to be coated. The substrate lifting mechanism 230 can be a thimble mechanism, which comprises a thimble structure and a servo driving mechanism, and the servo driving mechanism is connected to the thimble structure and drives the thimble structure to lift the product to be coated.

[0294] The coating platform 200 further comprises a fine adjustment device 290 arranged on the rack 100, and the output end of the fine adjustment device 290 faces the bearing base 210. The fine adjustment device 290 is used to drive the bearing base 210 to move along the third direction Z, so as to fine adjust the bearing base 210, thereby further improving the levelness of the bearing base 210.

[0295] The bearing base 210 can be provided with a vacuum hole group 211, and the coating platform 200 further comprises a vacuum suction mechanism 260 and a vacuum breaking blowing mechanism 270. The vacuum suction mechanism 260 and the vacuum breaking blowing mechanism 270 can respectively perform vacuum suction and vacuum breaking blowing operations between the bearing base 210 and the product to be coated carried by the bearing base 210 through the vacuum hole group 211, so as to realize the fixing and quick releasing of the product to be coated. The bearing base 210 is further provided with a linear displacement sensor 280 for sensing the coating die 310.

[0296] The coating platform 200 further comprises a first positioning mechanism 240 and a second positioning mechanism 250 arranged on the bearing base 210. The first positioning mechanism 240 is used to adjust the first direction X of the product to be coated, and the second positioning mechanism 250 is used to adjust the second direction Y of the product to be coated.

[0297] In the embodiment, the number of coating assemblies 300 can be two, and the two coating assemblies 300 are arranged in sequence along the first direction X. The coating assembly 300 comprises a gantry mechanism 320 and a coating die 310, the gantry mechanism 320 comprises a gantry 321 and a moving base 322, and the coating die 310 is movably arranged on the gantry 321.

[0298] The coating driving mechanism 400 comprises a first driving unit 410 and a second driving unit 420; in the embodiment, the number of the first driving units 410 is two groups, the two groups of the first driving units 410 are arranged on the rack 100 in the second direction Y, and the two groups of the first driving units 410 can be used for driving the two groups of the coating assemblies 300 to move together; meanwhile, each group of the coating assemblies 300 is provided with two groups of the second driving units 420, specifically, the second driving units 420 are arranged on the opposite sides of the portal frame 321 of each group of the coating assemblies 300 in the second direction Y, and the two groups of the second driving units 420 arranged in each group of the coating assemblies 300 can be used for driving the coating die head 310 in the third direction Z to move.

[0299] The coating driving mechanism 400 comprises a first position sensor, a first displacement sensor 440, a second position sensor 450 and a second displacement sensor 460, the first position sensor and the first displacement sensor 440 are used for sensing the position of the coating die head 310 in the first direction X, and the second position sensor 450 and the second displacement sensor 460 are used for sensing the position of the coating die head 310 in the third direction Z.

[0300] The coating driving mechanism 400 further comprises a three-dimensional displacement sensor 470 for sensing the position of the coating die head 310 and a thickness detection sensor 480 for sensing the thickness of the product to be coated.

[0301] The inside of the coating die head 310 is formed with a first cavity 311 and a second cavity 312 in communication, the coating die head 310 is provided with a feeding port 313 communicating with the first cavity 311 and a lip port 314 communicating with the second cavity 312; in the third direction Z, the first cavity 311 is located above the second cavity 312; in the extension direction of the first cavity 311 and away from the feeding port 313, the height of the first cavity 311 in the third direction Z decreases; thus, after the coating is introduced into the first cavity 311 from the feeding port 313, the coating spreads in the extension direction in the first cavity 311 according to gravity and flows into the second cavity 312, and the flow uniformity of the coating flowing into the second cavity 312 is better.

[0302] The coating die head 310 is further provided with a bubble discharge port 315 communicating with the first cavity 311. The coating die head 310 is provided with a fine adjustment bolt 330 for adjusting the gap thickness of the lip port 314. The coating die head 310 is provided with an anti-collision structure 340 facing the product to be coated.

[0303] The coating device 1000 further comprises a cleaning and pre-coating assembly 500, and the cleaning and pre-coating assembly 500 is arranged on the opposite sides of the coating platform 200 in the second direction Y. The cleaning and pre-coating assembly 500 comprises a pre-coating structure 510, a first scraper 511 and a first transverse driving mechanism 512. The pre-coating structure 510 is used for pre-coating the coating die 310, and the first scraper 511 is used for removing impurities and the like on the pre-coating structure 510 under the driving of the first transverse driving mechanism 512.

[0304] The cleaning and pre-coating assembly 500 further comprises a liquid immersion tank 520. The coating die 310 can be moved into the liquid immersion tank 520 for immersion to achieve the purposes of immersion and cleaning. The liquid immersion tank 520 is provided with a die lip cleaning assembly 530. The die lip cleaning assembly 530 comprises a second scraper 531, a second transverse driving mechanism 532, a pushing mechanism 533 and a spraying device. The second scraper 531 is adjusted in position along the first direction X under the driving of the pushing mechanism 533, and the pushing mechanism 533 and the second scraper 531 are moved along the second direction Y under the driving of the second transverse driving mechanism 532, so that the second scraper 531 can scrape off the crystalline substances at the lip 314 of the coating die 310. The second scraper 531 is recessed to form a scraping groove 5311, for example, a “V”-shaped scraping groove 5311, which can more comprehensively clean the surface of the coating die 310. At the same time, the surface of the coating die 310 or the surface of the second scraper 531 can be sprayed and cleaned by the cleaning nozzle 534 of the spraying device.

[0305] The coating device 1000 further comprises an air knife mechanism 600. The air knife mechanism 600 is arranged on one side of the coating die 310 in the second direction Y, and the air outlet of the air knife mechanism 600 faces the product to be coated. The air knife mechanism 600 is provided with a first adjusting mechanism 610, a second adjusting mechanism 620 and an angle adjusting mechanism 630. The first adjusting mechanism 610 is used for adjusting the position of the air outlet along the first direction X, the second adjusting mechanism 620 is used for adjusting the position of the air outlet along the third direction Z, and the angle adjusting mechanism 630 is used for adjusting the included angle between the air outlet and the third direction Z.

[0306] The coating device 1000 further comprises a liquid laying monitoring mechanism 700. The liquid laying monitoring mechanism 700 is arranged on the coating die 310, and the output end of the liquid laying monitoring mechanism 700 faces the product to be coated.

[0307] Thus, the product to be coated can be fed by an external device along the first direction X or the second direction Y to the coating platform 200 and supported by the substrate lifting mechanism 230. The coating drive mechanism can drive the two groups of coating assemblies 300 to move, so that the coating dies 310 of the two groups of coating assemblies 300 respectively coat the product to be coated. Thus, the two groups of coating assemblies 300 can be used to perform coating operations of different coating processes on the product to be coated, so as to meet the process requirement of simultaneous coating of two or more coating layers.

[0308] Please refer to Figure 2 and Figure 18 In a second aspect, the embodiments of the present application further provide a solar cell production line 10, comprising a feeding and discharging device 2000 and the coating device 1000 as described above, and the feeding and discharging device 2000 is used for feeding and discharging operation to the coating device 1000.

[0309] The feeding and discharging device 2000 is used for feeding and discharging operation to the coating device 1000; and the feeding and discharging mechanism includes but is not limited to an automatic device such as a mechanical hand or a robot.

[0310] The solar cell production line 10 provided by the embodiments of the present application comprises the coating device 1000 as described above. In the case that the coating efficiency of the coating device 1000 is high, the production efficiency of the solar cell production line 10 is also effectively improved.

[0311] The above is only the preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coating device, characterized in that: include frame; A coating platform, which is arranged on the frame and is used to place the product to be coated; Coating components, the number of the coating components is two or more, and the multiple coating components are arranged on the frame along the first direction; the coating components include a coating die head, and the coating die head is used to coat the product to be coated; and A coating drive mechanism, the coating drive mechanism being disposed on the frame, the coating drive mechanism being drivingly connected to the coating die head and being used to drive the coating die head to move along the first direction and the third direction; The product to be coated is fed onto the coating platform along the first direction or the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The coating device according to claim 1, characterized in that: The coating platform includes a carrying base and a base driving mechanism. The base driving mechanism is drivingly connected to the carrying base, and the base driving mechanism is used to drive the carrying base to move up and down along the third direction.

3. The coating device according to claim 2, characterized in that: The coating platform further includes a substrate lifting mechanism disposed on the carrying base, wherein the substrate lifting mechanism is used to carry the product to be coated and can drive the product to be coated to move up and down along the third direction.

4. The coating device according to claim 2 or 3, characterized in that: The coating platform further includes a first positioning mechanism provided on the carrying base, the first positioning mechanism being used to position and adjust a first direction of the product to be coated; And / or, the coating platform further includes a second positioning mechanism provided on the carrying base, and the second positioning mechanism is used for positioning and adjusting a second direction of the product to be coated.

5. The coating device according to any one of claims 2 to 4, characterized in that: The coating platform further includes a vacuum adsorption mechanism and a vacuum-breaking air blowing mechanism. A vacuum hole group is provided on the supporting base, and the vacuum adsorption mechanism and the vacuum-breaking air blowing mechanism are respectively connected to the vacuum hole group.

6. The coating device according to any one of claims 2 to 5, characterized in that: The coating platform further includes a linear displacement sensor disposed on the supporting base, wherein the linear displacement sensor is electrically connected to the coating drive mechanism and is used to sense the movement of the coating die head.

7. The coating device according to any one of claims 2 to 6, characterized in that: The coating platform further includes a fine-tuning device disposed on the frame, wherein an output end of the fine-tuning device faces the carrying base, and the fine-tuning device is used to drive the carrying base to move along the third direction.

8. The coating device according to any one of claims 1 to 7, characterized in that: The coating assembly further includes a gantry mechanism, and the coating drive mechanism includes a first drive unit and a second drive unit; The first driving unit is disposed on the frame, and the first driving unit is drivingly connected to the gantry mechanism and is used to drive the gantry mechanism to move along the first direction; The second driving unit is disposed on each of the gantry mechanisms. The second driving unit is drivingly connected to the coating die head and is used to drive the coating die head to move along the third direction.

9. The coating device according to claim 8, characterized in that: The coating drive mechanism further includes a first position sensor and a first displacement sensor, wherein the first position sensor and the first displacement sensor are electrically connected to the first drive unit, and the first position sensor and the first displacement sensor are used to sense the position of the coating die head in the first direction; And / or, the coating drive mechanism also includes a second position sensor and a second displacement sensor, the second position sensor and the second displacement sensor are electrically connected to the second drive unit, and the second position sensor and the second displacement sensor are used to sense the position of the coating die head in the third direction.

10. The coating device according to claim 8 or 9, characterized in that: The coating drive mechanism further includes a three-dimensional displacement sensor, the three-dimensional displacement sensor being electrically connected to the first drive unit and the second drive unit, and the three-dimensional displacement sensor being used to sense the coating die head; And / or, the coating drive mechanism further includes a thickness detection sensor, the thickness detection sensor is electrically connected to the second drive unit, and the thickness detection sensor is used to sense the thickness of the product to be coated.

11. The coating device according to any one of claims 1 to 10, characterized in that: The coating die head is provided with a first cavity and a second cavity connected to each other, and a feed port connected to the first cavity and a lip connected to the second cavity are provided on the coating die head; In the third direction, the first cavity is located above the second cavity; in the extension direction of the first cavity and in the direction away from the feed port, the height of the first cavity in the third direction tends to decrease.

12. The coating device according to claim 11, characterized in that: The coating die head is provided with a fine-tuning bolt, and the fine-tuning bolt is used to adjust the slit thickness of the lip.

13. The coating device according to any one of claims 1 to 12, characterized in that: The coating device further includes a cleaning and pre-coating component. In the second direction, the cleaning and pre-coating components are disposed on opposite sides of the coating platform.

14. The coating device according to claim 13, characterized in that: The cleaning pre-coating component includes a pre-coating structure, which is arranged on the frame and is used to pre-coat the coating die head.

15. The coating device according to claim 14, characterized in that: The cleaning pre-coating assembly includes a first scraper and a first transverse drive mechanism, the first transverse drive mechanism is arranged on the frame, the first transverse drive mechanism is driven and connected to the first scraper, and the first transverse drive mechanism is used to drive the first scraper to scrape along the pre-coating structure.

16. The coating device according to any one of claims 13 to 15, characterized in that: The cleaning and pre-coating assembly includes an immersion tank arranged on the frame, and the immersion tank is used for soaking the coating die head.

17. The coating device according to claim 16, characterized in that: A die lip cleaning component is provided in the immersion tank, and the die lip cleaning component is used for cleaning the lip of the coating die.

18. The coating device according to claim 17, characterized in that: The die lip cleaning assembly includes a second scraper, a second transverse drive mechanism and a propulsion mechanism. The propulsion mechanism is driven and connected to the second scraper and is used to drive the second scraper to move along the first direction. The second transverse drive mechanism is driven and connected to the propulsion mechanism and is used to drive the propulsion mechanism to move along the second direction.

19. The coating device according to claim 18, characterized in that: The second scraper is recessed to form a scraping groove, the scraping groove is used for inserting the coating die head, and the groove wall of the scraping groove abuts against the surface of the coating die head.

20. The coating device according to claim 18 or 19, characterized in that: The die lip cleaning assembly further comprises a spray device, and the cleaning air nozzle of the spray device is arranged on the second scraper.

21. The coating device according to any one of claims 1 to 20, characterized in that: The coating assembly further includes a feeding unit, which includes a liquid injection mechanism and a liquid supply structure. The liquid supply structure is connected to the coating die head through the liquid injection mechanism.

22. The coating device according to claim 21, characterized in that: The liquid supply structure includes a liquid supply tank and a liquid storage tank. The liquid storage tank is provided with a pressurization pipeline, a pressure relief pipeline and a liquid outlet pipeline. The liquid storage tank is connected to the liquid supply tank through the liquid outlet pipeline; the liquid supply tank is provided with a diaphragm valve and a liquid supply pipeline. The liquid supply tank is connected to the liquid injection mechanism through the liquid supply pipeline.

23. The coating device according to claim 22, characterized in that: In the liquid supply tank, the pipe opening end of the liquid outlet pipeline is higher than the pipe opening end of the liquid supply pipeline.

24. The coating device according to any one of claims 1 to 23, characterized in that: The coating device further comprises an air knife mechanism, which is arranged on the coating die head, and an air outlet of the air knife mechanism faces the product to be coated.

25. The coating device according to claim 24, characterized in that: The wind knife mechanism is provided with a first adjustment mechanism, a second adjustment mechanism and an angle adjustment mechanism. The first adjustment mechanism is used to adjust the position of the air outlet along the first direction, the second adjustment mechanism is used to adjust the position of the air outlet along the third direction, and the angle adjustment mechanism is used to adjust the angle between the air outlet and the third direction.

26. The coating device according to any one of claims 1 to 25, characterized in that: The coating device further includes a liquid spreading monitoring mechanism, which is disposed on the coating die head, and an output end of the liquid spreading monitoring mechanism faces the product to be coated.

27. The coating device according to any one of claims 1 to 26, characterized in that: The coating device further includes a controller electrically connected to the coating platform and the coating drive mechanism.

28. A solar cell production line, characterized by: It comprises a loading and unloading device and a coating device as described in any one of claims 1 to 27, wherein the loading and unloading device is used to perform loading and unloading operations on the coating device.

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