A kind of photovoltaic adhesive film and its coating device

Abstract

The present application relates to the technical field of photovoltaic cells, in particular to a photovoltaic adhesive film and a film coating device thereof.The present application sets the film pressing device on the ground.The cleaning device is set on the film pressing device and is drivingly connected with the film pressing device.The auxiliary film pressing device is set on the film pressing device and is drivingly connected with the film pressing device.The controller is set on the side of the film pressing device and on the ground, and is electrically connected with the film pressing device.The present application can clean the photovoltaic panel before coating the film, avoid the gap and bubble of the adhesive film, and press the adhesive film on the photovoltaic panel after coating the film, and evenly apply a layer of beneficial chemical reagent on the surface of the photovoltaic panel, improve the working performance of the back plate of the photovoltaic panel, and lubricate the film pressing device of the equipment, avoid scratches on the adhesive film of the back plate of the photovoltaic panel.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic cell technology, and in particular to a photovoltaic adhesive film and its coating device. Background Technology

[0002] A coating device is used to cover solar cells with a photovoltaic film. Its working principle typically involves bonding the film tightly to the cells, glass, and backsheet through methods such as heating and pressurization.

[0003] In existing technologies, during the coating of photovoltaic panels, dust inevitably adheres to the surface of the panels due to the storage environment. Furthermore, after coating, air bubbles may remain between the adhesive film and the coated surface, requiring compression and removal. However, when using compression to tighten the adhesive film and remove bubbles, the friction generated by the rotating pressure roller can damage the film. Therefore, to address these issues, we provide a photovoltaic adhesive film and its coating apparatus. Summary of the Invention

[0004] The present invention addresses the technical problem of how to clean photovoltaic panels before applying a coating to prevent gaps and air bubbles during the coating process, and how to press the coating onto the photovoltaic panel after coating and uniformly apply a beneficial chemical reagent to its surface to improve the working performance of the photovoltaic panel backsheet, while also lubricating the pressing device of the equipment to prevent scratches on the coating onto the photovoltaic panel backsheet. The invention provides a photovoltaic coating and its coating device.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a film coating device, comprising: a film pressing device, a cleaning device, an auxiliary film pressing device, and a controller.

[0006] The membrane pressing device is mounted on the ground. A cleaning device is mounted on the membrane pressing device and connected to its drive. An auxiliary membrane pressing device is mounted on the membrane pressing device and connected to its drive. A controller is located to the side of the membrane pressing device and mounted on the ground; the controller is electrically connected to the membrane pressing device.

[0007] Before applying the film to the backsheet of the photovoltaic panel, the user can place the photovoltaic panel backsheet on the film pressing device. The film pressing device can transport the photovoltaic panel backsheet to the cleaning device. The cleaning device can clean the film-coating surface of the photovoltaic panel backsheet under the action of the film pressing device, so as to avoid poor film coating effect due to dust adhering to the photovoltaic panel backsheet. After the photovoltaic panel backsheet is coated, the user can control the film pressing device to reverse the transport. At this time, the film pressing device will drive the cleaning device to stop working and return to its original position, so as to avoid damaging the film on the photovoltaic panel backsheet after the film has been coated. At the same time, the film pressing device can also press the film on the photovoltaic panel backsheet to eliminate air bubbles formed between the film and the photovoltaic panel backsheet, so that the film adheres tightly to the photovoltaic panel backsheet. When the laminating device presses the adhesive film on the photovoltaic panel backsheet, it also drives the auxiliary laminating device. The auxiliary laminating device helps lubricate the laminating device, preventing it from leaving marks on the adhesive film during the laminating process. It also evenly coats the adhesive film with beneficial chemical reagents to improve the performance of the photovoltaic panel backsheet and the adhesion between the adhesive film and the backsheet.

[0008] In this way, the equipment can clean the photovoltaic backsheet before applying the film, avoiding gaps and air bubbles during film application. After film application, the equipment can also press the film on the photovoltaic backsheet firmly and evenly apply a layer of beneficial chemical reagent to its surface, improving the working performance of the photovoltaic backsheet and lubricating the pressing device to prevent scratches on the film on the photovoltaic backsheet.

[0009] Furthermore, the film pressing device includes: a conveyor support, a first conveyor roller, a second conveyor roller, a conveyor motor, a conveyor belt, a box body, a film covering mechanism, two first vertical plates, a horizontal plate, two vertical chutes, an image sensor, a pressing roller, and a cylinder.

[0010] The conveyor support is set on the ground.

[0011] The first conveying roller is installed inside the conveying support, with both ends passing through the two opposite sides of the conveying support and extending to the outer side of the two opposite sides of the conveying support. The sides of the first conveying roller are rotatably connected to the two opposite sides of the conveying support, and the axis of rotation is set horizontally.

[0012] The conveyor motor is located on the side of the conveyor support and on the side of the first conveyor roller. The rotating shaft of the conveyor motor is fixedly connected to the outer end of the first conveyor roller extending to one side of the conveyor support. The conveyor motor is also fixedly connected to the outer side of the conveyor support through a support plate. The conveyor motor is electrically connected to the controller.

[0013] The second conveyor roller is located inside the conveyor support, to the side of the first conveyor roller, and parallel to the first conveyor roller. The two ends of the second conveyor roller pass through the two opposite sides of the conveyor support and extend to the outer sides of the two opposite sides of the conveyor support. The sides of the second conveyor roller are rotatably connected to the two opposite sides of the conveyor support, and the axis of rotation is parallel to the axis of the first conveyor roller.

[0014] The conveyor belt is installed inside the conveyor support and is fitted onto the first and second conveyor rollers. The inner side of the conveyor belt is in contact with the side of the first and second conveyor rollers.

[0015] The film coating mechanism is located above the conveyor belt, directly above the second conveyor roller. The film coating mechanism is connected to the top surface of the conveyor support and is electrically connected to the controller.

[0016] The top surface of the box is closed and positioned above the conveyor belt, between the film covering mechanism and the conveyor motor. The bottom surface of the box is fixedly connected to the top surface of the conveyor support. Two discharge ports are respectively provided on two opposite side walls of the box in the same direction as the conveyor belt. Several dust curtains are provided on the inner top surface of the two discharge ports, and the length of the dust curtains matches the height of the two discharge ports.

[0017] Two vertical chutes are respectively set inside the box body, and are respectively set on two parallel inner walls inside the box body that do not have discharge ports. The two vertical chutes are parallel to each other, and their lengths match the lengths of the inner walls of the box body.

[0018] The horizontal plate is located inside the box body, above the conveyor belt. The two sides of the horizontal plate are respectively located inside the two vertical chute and are slidably connected to the inner walls of the two vertical chute.

[0019] The cylinder is located above the box body, and the cylinder push rod passes through the top of the box body and extends into the box body. The end face of the push rod extending into the box body is fixedly connected to the top surface of the horizontal plate. The air inlet of the cylinder is connected to the air source, and the control circuit is electrically connected to the controller.

[0020] Two first vertical plates are respectively installed inside the box body, between the horizontal plate and the conveyor belt. The top surfaces of the two first vertical plates are fixedly connected to the bottom surfaces of the horizontal plate, and there is a gap between the two first vertical plates, which are parallel to each other.

[0021] The pressure roller is located inside the box body, between the two first vertical plates and above the conveyor belt. The two ends of the pressure roller are rotatably connected to the sides of the two first vertical plates that are close to each other, and the axis of rotation is perpendicular to the axis of the cylinder's telescopic rod.

[0022] The image sensor is located inside the box, above the horizontal plate and to the side of the two first vertical plates. The image sensor is fixedly connected to the inner top surface of the box, and the detection lens faces the top surface of the conveyor belt. The image sensor is also electrically connected to the controller.

[0023] By setting up an image sensor, images of a photovoltaic panel backsheet with and without adhesive film, as well as an empty conveyor belt, can be recorded simultaneously. This allows the controller to activate a cylinder only when the photovoltaic panel backsheet with adhesive film moves below the image sensor, thereby pressing the pressure roller firmly onto the film-coated surface of the photovoltaic panel backsheet to tighten the adhesive film. The film-coating mechanism utilizes existing photovoltaic panel roller film-coating devices.

[0024] Furthermore, the film pressing device also includes an anti-static vacuum cleaner.

[0025] The anti-static vacuum cleaner is located on the side of the conveyor support and on the ground. The suction port of the anti-static vacuum cleaner passes through the side wall of the box through a pipe and is connected to the inside of the box. The anti-static vacuum cleaner is also electrically connected to the controller.

[0026] By installing an anti-static vacuum cleaner, dust inside the box can be sucked up when it is started, thus ensuring a dust-free environment inside the box. At the same time, it can also remove static electricity from the surface of the photovoltaic panel backsheet coating, so that the subsequent coating process can ensure a good coating effect.

[0027] Furthermore, the film pressing device also includes: a support plate and a pressure sensor.

[0028] The support plate is hollow inside and its length is twice that of the photovoltaic panel backsheet. The support plate is set inside the conveyor belt and below the box body. The side of the support plate is fixedly connected to the inner wall of the conveyor support.

[0029] The pressure sensor is installed inside the support plate and is fixedly connected to the inner wall of the support plate. The probe end of the pressure sensor passes through the top of the support plate and extends to the top of the support plate. The pressure sensor is electrically connected to the controller.

[0030] Furthermore, the pressure roller is made of a corrosion-resistant material with a smooth surface, and several heating wires are installed inside the pressure roller, and these heating wires are electrically connected to the controller.

[0031] By setting several heating wires, the pressure roller can better adhere the adhesive film on the backsheet of the photovoltaic panel to the backsheet of the photovoltaic panel.

[0032] Furthermore, the cleaning device includes: a second vertical plate, a third vertical plate, a first through-hole groove, a second through-hole groove, a first pulley, a second pulley, a gear, a rack, a cleaning rod, a first sprocket, a second sprocket, a rotating rod, a tensioning mechanism, and a return spring.

[0033] The second vertical plate is positioned above the conveyor support, between the film-coating mechanism and the box body, and the bottom surface of the second vertical plate is fixedly connected to the top surface of the conveyor support.

[0034] The third vertical plate is positioned above the conveyor support, between the film-coating mechanism and the box. The third vertical plate is opposite to and parallel to the second vertical plate, and its bottom surface is fixedly connected to the top surface of the conveyor support.

[0035] The first through-hole groove is vertically arranged on the second vertical plate, perpendicular to the top surface of the conveyor belt. A slider is provided inside the first through-hole groove, and the slider is slidably connected to the inner wall of the first through-hole groove.

[0036] The second through-hole groove is vertically arranged on the third vertical plate, parallel to the first through-hole groove, and matches the length of the first through-hole groove. A slider is provided inside the second through-hole groove, and the slider is slidably connected to the inner wall of the second through-hole groove.

[0037] The rack is positioned on the side of the first through-hole groove away from the third vertical plate, above the conveyor belt, and the side of the rack is fixedly connected to the side of the slider in the first through-hole groove.

[0038] The reset spring is vertically installed inside the first through-hole groove, with its top end fixedly connected to the top surface inside the first through-hole groove and its bottom end fixedly connected to the top surface of the slider inside the first through-hole groove.

[0039] The cleaning rod is positioned between the first through-hole groove and the second through-hole groove. One end of the cleaning rod is rotatably connected to the side of the slider inside the first through-hole groove away from the rack, with the rotation axis perpendicular to the setting direction of the first through-hole groove. The other end passes through the side of the slider inside the second through-hole groove and extends to the side of the second through-hole groove away from the second vertical plate. The other end of the cleaning rod is rotatably connected to the side of the slider inside the second through-hole groove.

[0040] The rotating rod is horizontally positioned on the side of the second vertical plate near the rack, with one end of the rotating rod rotatably connected to the side of the second vertical plate near the rack. The axis of rotation is parallel to the axis of the cleaning rod.

[0041] The first pulley is mounted on the rotating rod and is located on the side of the rack away from the second vertical plate. The first pulley is fixedly connected to the side of the rotating rod.

[0042] The second pulley is fitted onto one end of the second conveyor roller that extends to the outside of the conveyor support and is on the same plane as the first pulley. The second pulley is fixedly connected to the side of the end of the second conveyor roller that extends to the outside of the conveyor support and is connected to the first pulley by a belt.

[0043] The gear is mounted on the rotating rod, positioned between the second vertical plate and the first pulley. The gear is fixedly connected to the side of the rotating rod and meshes with the rack.

[0044] The first sprocket is sleeved on the side end of the cleaning rod extending into the second through-hole groove away from the second vertical plate, and the first sprocket is fixedly connected to the side end of the cleaning rod extending into the second through-hole groove away from the second vertical plate.

[0045] The second sprocket is fitted onto the other end of the second conveyor roller extending to the outside of the conveyor support, and is on the same plane as the first sprocket. The second sprocket is fixedly connected to the other side of the second conveyor roller extending to the outside of the conveyor support, and is connected to the first sprocket by a chain.

[0046] The tensioning mechanism is located on the side of the conveyor support near the second sprocket, between the first sprocket and the second sprocket. The tensioning mechanism is fixedly connected to the side of the conveyor support near the second sprocket, and the tensioning wheel of the tensioning mechanism meshes with the chain connecting the first sprocket and the second sprocket.

[0047] By configuring a first pulley, a second pulley, a gear, a rack, and a cleaning rod, the cleaning rod can adjust its position by following the rotation direction of the gear under the drive of the rack. When the gear rotates forward, the rack descends, allowing the cleaning rod to move to the appropriate processing position. When the gear rotates backward, the rack rises, allowing the cleaning rod to return to its original position, preventing scratches from being left on the adhesive film surface of the already coated photovoltaic panel while the cleaning rod is still in the processing position. The tensioning mechanism ensures that the chain between the first and second sprockets maintains a suitable tension at all times, preventing the chain from slipping off the first and second sprockets or losing its working performance. Furthermore, the tensioning mechanism adopts a variable-position tensioning mechanism for the chain, a technology already in use in this field.

[0048] Furthermore, several brushes on the cleaning rod are made of nylon.

[0049] The cleaning rod is made of nylon, which ensures that the brushes are of the right softness and hardness, and avoids scratching the coated surface of the photovoltaic panel backsheet when cleaning.

[0050] Furthermore, the auxiliary pressure film device includes: an air bladder, a delivery pipe, three spray heads, a liquid storage tank, a cam, a first check valve, and a second check valve.

[0051] The airbag is located inside the box, between the shaft of the horizontal plate and the pressure roller, and is fixedly connected to the bottom surface of the horizontal plate.

[0052] The cam is located inside the housing, directly below the airbag. The cam is sleeved on the rotating shaft of the pressure roller, and is fixedly connected to the rotating shaft of the pressure roller and in contact with the airbag.

[0053] The liquid storage tank is located on the side of the box body, between the horizontal plate and the conveyor belt. The outer side of the liquid storage tank is fixedly connected to the outer side of the box body. The liquid storage tank contains a silane coupling agent solution.

[0054] The first one-way valve is located inside the box and below the horizontal plate. The airbag is close to the side of the liquid storage tank. One end of the first one-way valve passes through the side of the airbag and communicates with the inside of the airbag. The other end passes through the side of the box and the side of the liquid storage tank through a pipe and communicates with the inside of the liquid storage tank.

[0055] One end of the conveying pipe is closed and located inside the box, between the horizontal plate and the pressing roller. The side of the conveying pipe is fixedly connected to the bottom surface of the horizontal plate.

[0056] The second one-way valve is located inside the housing, below the horizontal plate, on the side of the airbag near the delivery pipe. One end of the second one-way valve passes through the side of the airbag and is connected to the inside of the airbag, while the other end is connected to the opening end of the delivery pipe through a hose.

[0057] Three spray heads are respectively located inside the box body, below the horizontal plate. The input pipes of the three spray heads pass through the side of the conveying pipe and are connected to the inside of the conveying pipe. The spraying direction of the three spray heads is directly facing the side of the pressing roller, and the distance between two close spray heads can divide the pressing roller into three equal parts.

[0058] By incorporating an airbag, delivery pipe, three spray nozzles, a storage tank, a cam, a first one-way valve, and a second one-way valve, the cam continuously squeezes and moves away from the airbag as the pressure roller rotates. This allows the airbag to continuously draw the silane coupling agent solution from the storage tank into the airbag through the first one-way valve. Simultaneously, the solution flows through the airbag and the second one-way valve into the delivery pipe, and finally is sprayed onto the surface of the pressure roller through the three spray nozzles. The silane coupling agent solution on the pressure roller surface not only lubricates the roller surface to a certain extent, preventing excessive friction with the adhesive film on the photovoltaic panel backsheet, but also coats the adhesive film on the backsheet with a layer of silane coupling agent solution, improving the film's performance.

[0059] Furthermore, the three spray heads are each configured as oscillating spray heads, and the oscillating area can completely cover the surface of the pressure roller.

[0060] The three spray heads are each set as oscillating spray heads, which allows the three spray heads to spray the silane coupling agent solution evenly on each position of the pressing roller, so as to avoid uneven application of the silane coupling agent solution when the pressing roller presses the adhesive film on the back sheet of the photovoltaic panel.

[0061] A photovoltaic encapsulant film, comprising: the photovoltaic encapsulant film is an EVA encapsulant film.

[0062] The beneficial effects of this invention are:

[0063] 1. This invention comprises a film pressing device, a cleaning device, an auxiliary film pressing device, and a controller. The film pressing device eliminates static electricity on the film-coated surface of the photovoltaic panel backsheet and presses the film-coated photovoltaic panel backsheet firmly, ensuring tight adhesion between the adhesive film and the photovoltaic panel backsheet and removing air bubbles. The cleaning device cleans the surface of the photovoltaic panel backsheet before film coating, preventing excessive dust adhesion that could affect subsequent coating. The auxiliary film pressing device sprays a chemical reagent onto the film pressing device while it is pressing the adhesive film onto the photovoltaic panel backsheet. This lubricates the device, preventing marks from being left on the adhesive film on the photovoltaic panel backsheet during pressing, and evenly applies beneficial chemical reagents to the adhesive film, thereby improving the performance of the photovoltaic panel backsheet and the adhesion between the adhesive film and the photovoltaic panel backsheet.

[0064] In this way, the equipment can clean the photovoltaic panel before applying the film to avoid gaps and air bubbles during the film application. After film application, the equipment can also press the film on the photovoltaic panel firmly and apply a layer of beneficial chemical reagent evenly to its surface. This improves the working performance of the photovoltaic panel backsheet and lubricates the pressing device of the equipment, preventing scratches on the film on the photovoltaic panel backsheet.

[0065] 2. This invention, by configuring a first pulley, a second pulley, a gear, a rack, a cleaning rod, and a tensioning mechanism, allows the cleaning rod to adjust its position by following the rotation direction of the gear under the drive of the rack. When the gear rotates forward, the rack descends, allowing the cleaning rod to move to a suitable processing position. When the gear rotates backward, the rack rises, allowing the cleaning rod to return to its original position, preventing scratches from being left on the adhesive film surface of the already coated photovoltaic panel while the cleaning rod is still in the processing position. The tensioning mechanism ensures that the chain between the first and second sprockets maintains a suitable tension at all times, thus preventing the chain from slipping off the first and second sprockets or losing its working performance. Furthermore, the tensioning mechanism employs a type of variable-position tensioning mechanism used in existing technologies for chains. Attached Figure Description

[0066] Figure 1 This is a front view of the present invention;

[0067] Figure 2 This is a side sectional view of the box body and the conveying support of the present invention;

[0068] Figure 3 This is a schematic diagram of the back side of region A of the present invention.

[0069] Explanation of reference numerals in the attached drawings: 101, conveyor belt; 102, box body; 103, film coating mechanism; 105, first vertical plate; 106, horizontal plate; 107, image sensor; 108, pressure roller; 109, cylinder; 110, support plate; 111, conveyor bracket; 112, first conveyor roller; 113, second conveyor roller; 114, conveyor motor; 115, pressure sensor; 201, second vertical plate; 202, first through-hole groove; 203, first... 204. Pulley; 205. Gear; 206. Rack; 207. Cleaning rod; 208. Second pulley; 209. Rotating rod; 210. Tensioning mechanism; 211. Third vertical plate; 212. First sprocket; 213. Second sprocket; 214. Return spring; 215. Second through-hole groove; 301. Airbag; 302. Delivery pipe; 303. Spray head; 304. Liquid storage tank; 305. Cam; 306. First check valve; 307. Second check valve. Detailed Implementation

[0070] The following will describe the concept and technical effects of the present invention clearly and completely with reference to the embodiments, so as to fully understand the purpose, features and effects of the present invention.

[0071] Please see Figure 1-3 A film coating device, comprising: a film pressing device, a cleaning device, an auxiliary film pressing device, and a controller.

[0072] The membrane pressing device is mounted on the ground. A cleaning device is mounted on the membrane pressing device and connected to its drive. An auxiliary membrane pressing device is mounted on the membrane pressing device and connected to its drive. A controller is located to the side of the membrane pressing device and mounted on the ground; the controller is electrically connected to the membrane pressing device.

[0073] Before applying the film to the backsheet of the photovoltaic panel, the user can place the photovoltaic panel backsheet on the film pressing device. The film pressing device can transport the photovoltaic panel backsheet to the cleaning device. The cleaning device can clean the film-coating surface of the photovoltaic panel backsheet under the action of the film pressing device, so as to avoid poor film coating effect due to dust adhering to the photovoltaic panel backsheet. After the photovoltaic panel backsheet is coated, the user can control the film pressing device to reverse the transport. At this time, the film pressing device will drive the cleaning device to stop working and return to its original position, so as to avoid damaging the film on the photovoltaic panel backsheet after the film has been coated. At the same time, the film pressing device can also press the film on the photovoltaic panel backsheet to eliminate air bubbles formed between the film and the photovoltaic panel backsheet, so that the film adheres tightly to the photovoltaic panel backsheet. When the laminating device presses the adhesive film on the photovoltaic panel backsheet, it also drives the auxiliary laminating device. The auxiliary laminating device helps lubricate the laminating device, preventing it from leaving marks on the adhesive film during the laminating process. It also evenly coats the adhesive film with beneficial chemical reagents to improve the performance of the photovoltaic panel backsheet and the adhesion between the adhesive film and the backsheet.

[0074] In this way, the equipment can clean the photovoltaic backsheet before applying the film, avoiding gaps and air bubbles during film application. After film application, the equipment can also press the film on the photovoltaic backsheet firmly and evenly apply a layer of beneficial chemical reagent to its surface, improving the working performance of the photovoltaic backsheet and lubricating the pressing device to prevent scratches on the film on the photovoltaic backsheet.

[0075] The film pressing device includes: a conveyor support 111, a first conveyor roller 112, a second conveyor roller 113, a conveyor motor 114, a conveyor belt 101, a box body 102, a film covering mechanism 103, two first vertical plates 105, a horizontal plate 106, two vertical chutes, an image sensor 107, a pressing roller 108, and a cylinder 109.

[0076] The conveyor support 111 is set on the ground.

[0077] The first conveying roller 112 is disposed inside the conveying bracket 111, and its two ends pass through the two opposite sides of the conveying bracket 111 respectively, and extend to the outer side of the two opposite sides of the conveying bracket 111. The sides of the first conveying roller 112 are rotatably connected to the two opposite sides of the conveying bracket 111 respectively, and the rotation axis is set laterally.

[0078] The conveyor motor 114 is located on the side of the conveyor support 111 and on the side of the first conveyor roller 112. The rotation shaft of the conveyor motor 114 is fixedly connected to one end of the first conveyor roller 112 extending to the outer side of one side of the conveyor support 111. The conveyor motor 114 is also fixedly connected to the outer side of the conveyor support 111 through a support plate. The conveyor motor 114 is electrically connected to the controller.

[0079] The second conveying roller 113 is disposed inside the conveying bracket 111, located to the side of the first conveying roller 112, and parallel to the first conveying roller 112. The two ends of the second conveying roller 113 pass through the two opposite sides of the conveying bracket 111 respectively, and extend to the outer side of the two opposite sides of the conveying bracket 111. The sides of the second conveying roller 113 are rotatably connected to the two opposite sides of the conveying bracket 111 respectively, and the axis of rotation is parallel to the axis of the first conveying roller 112.

[0080] The conveyor belt 101 is disposed inside the conveyor support 111 and is sleeved on the first conveyor roller 112 and the second conveyor roller 113. The inner side of the conveyor belt 101 is in contact with the side of the first conveyor roller 112 and the side of the second conveyor roller 113.

[0081] The film coating mechanism 103 is located above the conveyor belt 101 and directly above the second conveyor roller 113. The film coating mechanism 103 is connected to the top surface of the conveyor support 111 and is electrically connected to the controller.

[0082] The top surface of the box 102 is closed and is positioned above the conveyor belt 101, between the film covering mechanism 103 and the conveyor motor 114. The bottom surface of the box 102 is fixedly connected to the top surface of the conveyor support 111. Two discharge ports are respectively provided on two opposite side walls of the box 102 and the conveyor belt 101 in the same direction. Several dust curtains are respectively provided on the inner top surface of the two discharge ports, and the length of the dust curtains matches the height of the two discharge ports.

[0083] Two vertical sluices are respectively set inside the box body 102, and are respectively set on two parallel inner walls inside the box body 102 that are not provided with discharge ports. The two vertical sluices are parallel to each other, and their lengths are respectively matched with the lengths of the inner walls of the box body 102.

[0084] The horizontal plate 106 is disposed inside the box body 102, above the conveyor belt 101. The two sides of the horizontal plate 106 are respectively disposed inside the two vertical slide grooves and are slidably connected to the inner walls of the two vertical slide grooves.

[0085] The cylinder 109 is positioned above the box 102, and the push rod of the cylinder 109 passes through the top of the box 102 and extends into the interior of the box 102. The end face of the push rod of the cylinder 109 extending into the interior of the box 102 is fixedly connected to the top surface of the horizontal plate 106. The air inlet of the cylinder 109 is connected to the air source, and the control circuit is electrically connected to the controller.

[0086] Two first vertical plates 105 are respectively disposed inside the box body 102, between the horizontal plate 106 and the conveyor belt 101. The top surfaces of the two first vertical plates 105 are fixedly connected to the bottom surfaces of the horizontal plate 106, and there is a gap between the two first vertical plates 105, and they are parallel to each other.

[0087] The pressure roller 108 is located inside the box body 102, between the two first vertical plates 105 and above the conveyor belt 101. The two ends of the pressure roller 108 are rotatably connected to the sides of the two first vertical plates 105 that are close to each other, and the axis of rotation is perpendicular to the axis of the telescopic rod of the cylinder 109.

[0088] The image sensor 107 is disposed inside the housing 102, above the horizontal plate 106, and to the side of the two first vertical plates 105. The image sensor 107 is fixedly connected to the inner top surface of the housing 102, and the detection lens faces the top surface of the conveyor belt 101. The image sensor 107 is also electrically connected to the controller.

[0089] By setting up an image sensor 107, images of the photovoltaic panel backsheet with adhesive film, the photovoltaic panel backsheet without adhesive film, and the unloaded conveyor belt 101 can be recorded simultaneously. This allows the controller to activate the cylinder 109 only when the photovoltaic panel backsheet with adhesive film moves below the image sensor 107, thereby pressing the pressure roller 108 tightly onto the film-coated surface of the photovoltaic panel backsheet to compress the adhesive film. The film-coating mechanism 103 uses a conventional photovoltaic panel roller film-coating device.

[0090] The film pressing device also includes: an anti-static dust collector.

[0091] The anti-static vacuum cleaner is located on the side of the conveyor bracket 111 and is placed on the ground. The suction port of the anti-static vacuum cleaner passes through the side wall of the box 102 through a pipe and is connected to the inside of the box 102. The anti-static vacuum cleaner is also electrically connected to the controller.

[0092] By setting up an anti-static vacuum cleaner, dust inside the box 102 can be sucked out when it is started, thus ensuring a dust-free environment inside the box 102. At the same time, it can also remove static electricity from the surface of the photovoltaic panel backsheet coating, so that the subsequent coating mechanism 103 can ensure a good coating effect.

[0093] The film pressing device also includes: a support plate 110 and a pressure sensor 115.

[0094] The support plate 110 is hollow inside and its length is twice the length of the photovoltaic panel backsheet. The support plate 110 is set inside the conveyor belt 101 and below the box 102. The side of the support plate 110 is fixedly connected to the inner wall of the conveyor bracket 111.

[0095] The pressure sensor 115 is disposed inside the support plate 110 and is fixedly connected to the inner wall of the support plate 110. The detection end of the pressure sensor 115 passes through the top of the support plate 110 and extends to the top of the support plate 110. The pressure sensor 115 is electrically connected to the controller.

[0096] The pressure roller 108 is made of corrosion-resistant material and has a smooth surface. Several heating wires are provided inside the pressure roller 108, and the heating wires are electrically connected to the controller.

[0097] By setting several heating wires, the pressing roller 108 can better adhere the adhesive film on the back cover film of the photovoltaic panel to the back cover film surface.

[0098] The cleaning device includes: a second vertical plate 201, a third vertical plate 210, a first through-hole groove 202, a second through-hole groove 214, a first pulley 203, a second pulley 207, a gear 204, a rack 205, a cleaning rod 206, a first sprocket 211, a second sprocket 212, a rotating rod 208, a tensioning mechanism 209, and a return spring 213.

[0099] The second vertical plate 201 is disposed above the conveying bracket 111, between the film covering mechanism 103 and the box body 102, and the bottom surface of the second vertical plate 201 is fixedly connected to the top surface of the conveying bracket 111.

[0100] The third vertical plate 210 is disposed above the conveying bracket 111, between the film covering mechanism 103 and the box body 102. The third vertical plate 210 and the second vertical plate 201 are opposite to each other and parallel to each other, and the bottom surface is fixedly connected to the top surface of the conveying bracket 111.

[0101] The first through-hole groove 202 is vertically arranged on the second vertical plate 201, perpendicular to the top surface of the conveyor belt 101. A slider is provided inside the first through-hole groove 202, and the slider is slidably connected to the inner wall of the first through-hole groove 202.

[0102] The second through-hole groove 214 is vertically arranged on the third vertical plate 210, parallel to the first through-hole groove 202, and matches the length of the first through-hole groove 202. A slider is provided inside the second through-hole groove 214, and the slider is slidably connected to the inner wall of the second through-hole groove 214.

[0103] The rack 205 is located on the side of the first through-hole groove 202 away from the third vertical plate 210 and above the conveyor belt 101. The side of the rack 205 is fixedly connected to the side of the slider in the first through-hole groove 202.

[0104] The reset spring 213 is vertically disposed inside the first through hole groove 202, with its top end fixedly connected to the inner top surface of the first through hole groove 202 and its bottom end fixedly connected to the top surface of the slider inside the first through hole groove 202.

[0105] The cleaning rod 206 is disposed between the first through-hole groove 202 and the second through-hole groove 214. One end of the cleaning rod 206 is rotatably connected to the side of the slider inside the first through-hole groove 202 away from the rack 205, with the rotation axis perpendicular to the setting direction of the first through-hole groove 202. The other end passes through the side of the slider inside the second through-hole groove 214 and extends to the side of the second through-hole groove 214 away from the second vertical plate 201. The other end of the cleaning rod 206 is rotatably connected to the side of the slider inside the second through-hole groove 214.

[0106] The rotating rod 208 is horizontally positioned on the side of the second vertical plate 201 near the rack 205. One end of the rotating rod 208 is rotatably connected to the side of the second vertical plate 201 near the rack 205, and the axis of rotation is parallel to the axis of the cleaning rod 206.

[0107] The first pulley 203 is sleeved on the rotating rod 208 and is located on the side of the rack 205 away from the second vertical plate 201. The first pulley 203 is fixedly connected to the side of the rotating rod 208.

[0108] The second pulley 207 is sleeved on one end of the second conveyor roller 113 extending to the outside of the conveyor support 111, and is in the same plane as the first pulley 203. The second pulley 207 is fixedly connected to the side of the end of the second conveyor roller 113 extending to the outside of the conveyor support 111, and is connected to the first pulley 203 by a belt.

[0109] Gear 204 is sleeved on rotating rod 208 and is located between second vertical plate 201 and first pulley 203. Gear 204 is fixedly connected to the side of rotating rod 208 and meshes with rack 205.

[0110] The first sprocket 211 is sleeved on the side end of the cleaning rod 206 extending into the second through-hole groove 214 away from the second vertical plate 201. The first sprocket 211 is fixedly connected to the side end of the cleaning rod 206 extending into the second through-hole groove 214 away from the second vertical plate 201.

[0111] The second sprocket 212 is sleeved on the other end of the second conveyor roller 113 extending to the outside of the conveyor support 111, and is in the same plane as the first sprocket 211. The second sprocket 212 is fixedly connected to the other end of the second conveyor roller 113 extending to the outside of the conveyor support 111, and is connected to the first sprocket 211 by a chain.

[0112] The tensioning mechanism 209 is located on the side of the conveyor support 111 near the second sprocket 212, between the first sprocket 211 and the second sprocket 212. The tensioning mechanism 209 is fixedly connected to the side of the conveyor support 111 near the second sprocket 212, and the tensioning wheel of the tensioning mechanism 209 meshes with the chain connected to the first sprocket 211 and the second sprocket 212.

[0113] By configuring a first pulley 203, a second pulley 207, a gear 204, a rack 205, and a cleaning rod 206, the cleaning rod 206 can adjust its position by following the rotation direction of the gear 204 under the drive of the rack 205. When the gear 204 rotates forward, the rack 205 descends, allowing the cleaning rod 206 to move to a suitable processing position. Conversely, when the gear 204 rotates backward, the rack 205 rises, allowing the cleaning rod 206 to return to its original position, preventing scratches from being left on the adhesive film surface of the already coated photovoltaic panel while the cleaning rod 206 is still in the processing position. The tensioning mechanism 209 ensures that the chain between the first sprocket 211 and the second sprocket 212 maintains a suitable tension at all times, preventing the chain from slipping off the first sprocket 211 and the second sprocket 212 or losing its working performance. Furthermore, the tensioning mechanism 209 adopts a type of tensioning mechanism for variable chain positions commonly used in existing technologies.

[0114] Several brushes on the cleaning rod 206 are made of nylon.

[0115] The cleaning rod 206 is made of nylon material, which ensures that the brushes are of appropriate softness and hardness, and avoids scratching the coated surface of the photovoltaic panel backsheet when cleaning.

[0116] The auxiliary film pressing device includes: an air bag 301, a delivery pipe 302, three spray heads 303, a liquid storage tank 304, a cam 305, a first one-way valve 306, and a second one-way valve 307.

[0117] The airbag 301 is located inside the box 102, between the pivot of the horizontal plate 106 and the pressure roller 108, and the airbag 301 is fixedly connected to the bottom surface of the horizontal plate 106.

[0118] Cam 305 is located inside box 102, directly below airbag 301. Cam 305 is sleeved on the rotating shaft of pressure roller 108. Cam 305 is fixedly connected to the rotating shaft of pressure roller 108 and is in contact with airbag 301.

[0119] The liquid storage tank 304 is located on the side of the box body 102, between the transverse plate 106 and the conveyor belt 101. The outer side of the liquid storage tank 304 is fixedly connected to the outer side of the box body 102. The liquid storage tank 304 contains a silane coupling agent solution.

[0120] The first one-way valve 306 is located inside the housing 102 and below the horizontal plate 106. The airbag 301 is located on the side of the liquid storage tank 304. One end of the first one-way valve 306 passes through the side of the airbag 301 and communicates with the inside of the airbag 301. The other end passes through the side of the housing 102 and the side of the liquid storage tank 304 through a pipe and communicates with the inside of the liquid storage tank 304.

[0121] One end of the conveying pipe 302 is closed and is located inside the box body 102, between the horizontal plate 106 and the pressing roller 108. The side of the conveying pipe 302 is fixedly connected to the bottom surface of the horizontal plate 106.

[0122] The second one-way valve 307 is located inside the housing 102, below the horizontal plate 106, with the airbag 301 on the side near the delivery pipe 302. One end of the second one-way valve 307 passes through the side of the airbag 301 and is connected to the inside of the airbag 301, while the other end is connected to the opening end of the delivery pipe 302 through a hose.

[0123] Three spray heads 303 are respectively installed inside the box body 102, below the horizontal plate 106. The input pipes of the three spray heads 303 pass through the side of the conveying pipe 302 and are connected to the inside of the conveying pipe 302. The spraying direction of the three spray heads 303 is directly facing the side of the pressing roller 108, and the distance between two close spray heads 303 can divide the pressing roller 108 into three equal parts.

[0124] By configuring an airbag 301, a delivery pipe 302, three spray heads 303, a storage tank 304, a cam 305, a first one-way valve 306, and a second one-way valve 307, the cam 305 continuously squeezes and moves away from the airbag 301 as the pressure roller 108 rotates. This allows the airbag 301 to continuously draw the silane coupling agent solution from the storage tank 304 into the airbag 301 through the first one-way valve 306. Simultaneously, the solution enters the delivery pipe 302 through the airbag 301 and the second one-way valve 307, and is finally sprayed onto the surface of the pressure roller 108 through the three spray heads 303. The silane coupling agent solution on the surface of the pressure roller 108 not only lubricates the surface of the pressure roller 108 to a certain extent, preventing excessive friction with the adhesive film on the backsheet of the photovoltaic panel, but also coats the surface of the adhesive film on the backsheet with a layer of silane coupling agent solution, improving the working performance of the adhesive film.

[0125] The three spray heads 303 are respectively configured as swing spray heads 303, and the swing area can completely cover the surface of the pressure roller 108.

[0126] The three spray heads 303 are respectively set as swing spray heads 303, so that the three spray heads 303 can evenly spray the silane coupling agent solution on each position of the pressure roller 108, so as to avoid uneven application of silane coupling agent solution when the pressure roller 108 presses the adhesive film on the back sheet of the photovoltaic panel.

[0127] A photovoltaic encapsulant film, comprising: the photovoltaic encapsulant film is an EVA encapsulant film.

[0128] Work process:

[0129] When a user wants to apply a film to the backsheet of a photovoltaic panel, the user first places the backsheet on the conveyor belt 101 and controls the anti-static vacuum cleaner to start and the conveyor motor 114 to start forward through the controller. After the conveyor motor 114 starts forward, it drives the first conveyor roller 112 to rotate forward. The first conveyor roller 112 rotates forward and drives the conveyor belt 101 to transport the backsheet forward. The photovoltaic panel backsheet is transported by the conveyor belt 101 and enters the box 102 through one of the discharge ports of the box 102, and drives the second conveyor roller 113 to rotate forward.

[0130] The second conveyor roller 113 rotates forward, driving the second pulley 207 and the second sprocket 212 to rotate forward. The forward rotation of the second pulley 207, via the belt, drives the first pulley 203 to rotate forward. The forward rotation of the first pulley 203 drives the rotating rod 208 to rotate forward. The forward rotation of the rotating rod 208 drives the gear 204 to rotate forward. The forward rotation of the gear 204 drives the rack 205 to move downward. The downward movement of the rack 205 drives the slider inside the first through-hole groove 202 to move downward. The downward movement of the slider inside the first through-hole groove 202 pulls the return spring 213 to extend, and drives the cleaning rod 206 to move downward until the slider inside the first through-hole groove 202 reaches the lowest point inside the first through-hole groove 202, and drives the cleaning rod 206 to move to the appropriate position. When the slider inside the first through-hole groove 202 moves to the lowest point inside the first through-hole groove 202, the return spring 213 will stop being pulled downward by the slider inside the first through-hole groove 202. The return spring 213 will retract when it stops being pulled, and the retraction of the return spring 213 will drive the slider inside the first through-hole groove 202 to move upward. The upward movement of the slider inside the first through-hole groove 202 will drive the rack 205 to move upward. The upward movement of the rack 205 will re-engage with the gear 204. When the rack 205 re-engages with the gear 204, the forward rotation of the gear 204 will drive the rack 205 to move downward again, thereby ensuring that the cleaning rod 206 is always in the appropriate processing position.

[0131] The cleaning rod 206 moves downward, causing the slider inside the second through-hole groove 214 to move downward, which in turn causes the first sprocket 211 to move downward. The downward movement of the first sprocket 211 causes the chain to move downward, and the downward movement of the chain causes the sprocket of the connected tensioning mechanism 209 to move downward as well, so that the chain can always be in a working state and prevent it from falling off. The tensioning mechanism 209 adopts the existing technology of a tensioning mechanism 209 used for variable positions of chains.

[0132] When the second sprocket 212 rotates, it drives the chain to rotate, which in turn drives the sprocket of the tensioning mechanism 209 to rotate, and in turn drives the first sprocket 211 to rotate. The rotation of the first sprocket 211 drives the cleaning rod 206 to rotate.

[0133] When the photovoltaic panel backsheet enters the box 102 through one of its outlets, and the anti-static vacuum cleaner is activated, the vacuum cleaner sucks the dust from the photovoltaic panel backsheet inside the box 102 and eliminates static electricity. Simultaneously, the conveyor belt 101 continues forward, carrying the photovoltaic panel backsheet through the inlet of another box 102 and moving it to below the cleaning rod 206. The rotating cleaning rod 206 thoroughly removes any gaps and remaining dust from the surface of the photovoltaic panel backsheet. The conveyor belt 101 then continues forward, carrying the photovoltaic panel backsheet into the coating mechanism 103 for coating. The coating mechanism 103 uses a conventional photovoltaic panel roller coating device.

[0134] After the photovoltaic panel backsheet is coated, the user can control the conveyor motor 114 to start in reverse via the controller. When the conveyor motor 114 starts in reverse, it drives the first conveyor roller 112 to reverse, which in turn drives the conveyor belt 101 to transport the photovoltaic panel backsheet in reverse. The photovoltaic panel backsheet then passes under the cleaning rod 206 and enters the box 102 through another outlet. The reverse transport of the conveyor belt 101 also drives the second conveyor roller 113 to reverse.

[0135] The second conveyor roller 113 reverses, causing the second pulley 207 and the second sprocket 212 to reverse. The reverse rotation of the second pulley 207 causes the first pulley 203 to reverse via the belt. The reverse rotation of the first pulley 203 causes the rotating rod 208 to reverse. The reverse rotation of the rotating rod 208 causes the gear 204 to reverse.

[0136] When gear 204 reverses, it drives rack 205, which meshes with gear 204 again, to move upward. The upward movement of rack 205 causes slider inside first through-hole groove 202 to move upward. This upward movement of slider pushes return spring 213 back, and causes cleaning rod 206 to move upward until slider inside first through-hole groove 202 returns to its original position, and return spring 213 is in its initial state. The upward movement of cleaning rod 206 causes slider inside second through-hole groove 214 to move upward, and causes first sprocket 211 to move upward. The upward movement of first sprocket 211 causes chain to move upward, and the chain's upward movement causes the sprocket of connected tensioning mechanism 209 to move upward as well, ensuring the chain remains operational and preventing it from slipping off. Tensioning mechanism 209 employs existing technologies for variable-position chain tensioning mechanisms.

[0137] When the second sprocket 212 rotates, it drives the chain to rotate, which in turn drives the sprocket of the tensioning mechanism 209 to rotate, and in turn drives the first sprocket 211 to rotate. The rotation of the first sprocket 211 drives the cleaning rod 206 to rotate.

[0138] When the photovoltaic panel backsheet moves in the opposite direction to below the cleaning rod 206 and the cleaning rod 206 returns to its original position, the cleaning rod 206 will not clean the surface of the photovoltaic panel backsheet, thereby avoiding damage to the adhesive film already applied to the surface of the photovoltaic panel backsheet.

[0139] When the reverse-moving photovoltaic panel backsheet re-enters the box 102 through another outlet, the image sensor 107 inside the box 102 detects the entry of the photovoltaic panel backsheet with adhesive film. The image sensor 107 then transmits an image signal to the controller. Upon receiving and analyzing the signal, the controller activates the cylinder 109 to extend, and the heating wire inside the pressure roller 108 to begin heating. The telescopic rod of the cylinder 109 moves downward, causing the horizontal plate 106 to move downward. This downward movement of the horizontal plate 106 causes the two vertical plates, the airbag 301, and the conveying pipe 302 to move downward. The downward movement of the airbag 301 causes the first one-way valve 306 and the second one-way valve 307 to move downward. The downward movement of the conveying pipe 302 causes the three spray heads 303 to move downward. The downward movement of the two vertical plates causes the pressure roller 108 and the cam 305 to move downward until the pressure roller 108 is in close contact with the coated surface of the photovoltaic panel backsheet.

[0140] When the pressing roller 108 is pressed against the film-coated surface of the photovoltaic panel backsheet, the photovoltaic panel backsheet moving in the opposite direction will drive the pressing roller 108 to rotate. The rotation of the pressing roller 108 will drive the cam 305 to rotate, and can press the film on the film-coated surface of the photovoltaic panel backsheet. At the same time, after the heating wire inside the pressing roller 108 is activated, the pressing roller 108 can further assist the film to better adhere to the photovoltaic panel backsheet.

[0141] At the same time, when the photovoltaic panel backsheet moves slowly in the reverse direction, it can automatically change the position of the film surface of the photovoltaic panel backsheet, so that all parts of the film surface of the photovoltaic panel backsheet can be contacted and pressed by the pressure roller 108, thereby making the adhesive film on the film surface of the photovoltaic panel backsheet adhere tightly to the photovoltaic panel backsheet.

[0142] When the pressure roller 108 is in close contact with the film-coated surface of the photovoltaic panel backsheet, the photovoltaic panel backsheet will be subjected to the pressure of the pressure roller 108, causing it to move downwards and apply pressure to the detection part of the pressure sensor 115 extending from the inside of the support plate 110 to the top of the support plate 110. After the pressure sensor 115 is subjected to pressure, it can transmit the pressure data to the controller, so that the user can easily check the amount of pressure applied by the pressure roller 108 and avoid damaging the photovoltaic panel backsheet.

[0143] When the cam 305 rotates, it continuously contacts and moves away from the airbag 301. When the cam 305 contacts the airbag 301, the airbag 301 is squeezed by the cam 305 and contracts. When the airbag 301 contracts, it can transport the silane coupling agent solution inside the airbag 301 to the three spray heads 303 through the second one-way valve 307 and the delivery pipe 302. Then, the three spray heads 303 will spray the silane coupling agent solution onto the surface of the pressure roller 108. This prevents the pressure roller 108 from generating excessive friction with the film surface of the photovoltaic back panel when it contacts the film surface of the photovoltaic back panel, thus avoiding damage to the film of the photovoltaic back panel. Furthermore, when the pressure roller 108 rotates, it can also evenly coat the film surface of the photovoltaic back panel with the silane coupling agent solution, thereby improving the working performance of the photovoltaic back panel. When the cam 305 moves away from the airbag 301, the airbag 301 is squeezed by the stop cam 305 and thus recovers. As the cylinder 109 extends and drives the horizontal plate 106 to move downward to the lowest point, the horizontal plate 106 will also drive the airbag 301 to move to the lowest point. When the airbag 301 moves to the lowest point, its height will be lower than the height of the liquid storage tank 304. At this time, the recovery of the airbag 301 can transport the silane coupling agent solution inside the liquid storage tank 304 to the airbag 301 through the first one-way valve 306 and the pipeline until the silane coupling agent solution flows out of the airbag 301 again.

[0144] When the workpiece leaves the box 102 through the discharge port of one of the boxes 102 again under the drive of the conveyor belt 101, the image sensor 107 will transmit the image signal to the controller again. After receiving the image, the controller controls the cylinder 109 to retract. When the cylinder 109 retracts, the extension rod of the cylinder 109 moves upward, causing the horizontal plate 106 to move upward. The upward movement of the horizontal plate 106 causes the two vertical plates, the airbag 301, and the conveying pipe 302 to move upward. The upward movement of the airbag 301 causes the first one-way valve 306 and the second one-way valve 307 to move upward. The upward movement of the conveying pipe 302 causes the three spray heads 303 to move upward. The upward movement of the two vertical plates causes the pressure roller 108 and the cam 305 to move upward. At this time, the user can collect the photovoltaic backsheet that has been coated and place the next photovoltaic backsheet waiting to be coated on the surface of the conveyor belt 101.

[0145] The above embodiments are only some embodiments of the present invention, and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

Claims

1. A coating device, characterized in that, include: Film pressing device, cleaning device, auxiliary film pressing device, controller; The film pressing device is installed on the ground; the cleaning device is installed on the film pressing device and is driven and connected to the film pressing device; the auxiliary film pressing device is installed on the film pressing device and is driven and connected to the film pressing device; the controller is installed on the side of the film pressing device and is installed on the ground, and the controller is electrically connected to the film pressing device. The film pressing device includes a conveyor support (111), a first conveyor roller (112), a second conveyor roller (113), a conveyor motor (114), a conveyor belt (101), a box body (102), a film covering mechanism (103), two first vertical plates (105), a horizontal plate (106), two vertical chutes, an image sensor (107), a pressing roller (108), and a cylinder (109); The conveyor support (111) is set on the ground; The first conveying roller (112) is disposed inside the conveying bracket (111), and its two ends pass through the two opposite sides of the conveying bracket (111) and extend to the outer side of the two opposite sides of the conveying bracket (111). The sides of the first conveying roller (112) are rotatably connected to the two opposite sides of the conveying bracket (111), and the rotation axis is arranged laterally. The conveying motor (114) is disposed on the side of the conveying bracket (111) and on the side of the first conveying roller (112). The rotation shaft of the conveying motor (114) is fixedly connected to one end of the first conveying roller (112) extending to the outer side of one side of the conveying bracket (111). The conveying motor (114) is also fixedly connected to the outer side of the conveying bracket (111) through a support plate. The conveying motor (114) is electrically connected to the controller. The second conveying roller (113) is disposed inside the conveying bracket (111), located to the side of the first conveying roller (112), and parallel to the first conveying roller (112). The two ends of the second conveying roller (113) pass through the two opposite sides of the conveying bracket (111) and extend to the outer side of the two opposite sides of the conveying bracket (111). The side surfaces of the second conveying roller (113) are rotatably connected to the two opposite sides of the conveying bracket (111), and the axis of rotation is parallel to the axis of the first conveying roller (112). The conveyor belt (101) is disposed inside the conveyor support (111) and sleeved on the first conveyor roller (112) and the second conveyor roller (113). The inner side of the conveyor belt (101) is in contact with the side of the first conveyor roller (112) and the side of the second conveyor roller (113). The coating mechanism (103) is disposed above the conveyor belt (101) and directly above the second conveyor roller (113). The coating mechanism (103) is connected to the top surface of the conveyor support (111) and electrically connected to the controller. The top surface of the box (102) is closed and is located above the conveyor belt (101), between the film covering mechanism (103) and the transmission motor (114). The bottom surface of the box (102) is fixedly connected to the top surface of the transmission bracket (111). Two discharge ports are respectively provided on two opposite side walls of the box (102) in the same direction as the conveyor belt (101). Several dust curtains are respectively provided on the inner top surface of the two discharge ports. The length of the several dust curtains matches the height of the two discharge ports. The two vertical slides are respectively disposed inside the box body (102), and are respectively disposed on two parallel inner walls inside the box body (102) without discharge ports. The two vertical slides are parallel to each other, and their lengths are respectively matched with the lengths of the inner walls of the box body (102). The horizontal plate (106) is disposed inside the box body (102) and above the conveyor belt (101). The two sides of the horizontal plate (106) are respectively disposed inside the two vertical chute and are slidably connected to the inner walls of the two vertical chute respectively. The cylinder (109) is located above the box (102), and the push rod of the cylinder (109) passes through the top of the box (102) and extends into the interior of the box (102). The end face of the push rod of the cylinder (109) extending into the interior of the box (102) is fixedly connected to the top surface of the horizontal plate (106). The air inlet of the cylinder (109) is connected to the air source, and the control circuit is electrically connected to the controller. Two first vertical plates (105) are respectively disposed inside the box body (102), between the horizontal plate (106) and the conveyor belt (101). The top surfaces of the two first vertical plates (105) are respectively fixedly connected to the bottom surface of the horizontal plate (106), and there is a gap between the two first vertical plates (105) and they are parallel to each other. The pressing roller (108) is disposed inside the box body (102) and between the two first vertical plates (105) and above the conveyor belt (101). The two ends of the pressing roller (108) are rotatably connected to the sides of the two first vertical plates (105) that are close to each other, and the rotation axis is perpendicular to the telescopic rod axis of the cylinder (109). The image sensor (107) is disposed inside the housing (102) and above the horizontal plate (106), on the side of the two first vertical plates (105). The image sensor (107) is fixedly connected to the inner top surface of the housing (102), and the detection lens faces the top surface of the conveyor belt (101). The image sensor (107) is also electrically connected to the controller.

2. The coating device according to claim 1, characterized in that: The film pressing device also includes: an anti-static dust collector; The antistatic vacuum cleaner is located on the side of the conveyor bracket (111) and is placed on the ground. The suction port of the antistatic vacuum cleaner passes through the side wall of the box (102) through a pipe and communicates with the interior of the box (102). The antistatic vacuum cleaner is also electrically connected to the controller.

3. The coating device according to claim 1, characterized in that: The pressure film device further includes: a support plate (110) and a pressure sensor (115); The support plate (110) is hollow inside and its length is twice the length of the photovoltaic panel back sheet. The support plate (110) is set inside the conveyor belt (101) and below the box body (102). The side of the support plate (110) is fixedly connected to the inner wall of the conveyor bracket (111). The pressure sensor (115) is disposed inside the support plate (110) and fixedly connected to the inner wall of the support plate (110). The detection end of the pressure sensor (115) penetrates through the top of the support plate (110) and extends to the top of the support plate (110). The pressure sensor (115) is electrically connected to the controller.

4. The coating device according to claim 1, characterized in that: The pressing roller (108) is made of corrosion-resistant material and has a smooth surface. The pressing roller (108) is also provided with several heating wires inside, and the heating wires are electrically connected to the controller.

Images