CN218804632U - Printing screen, printing device and photovoltaic module - Google Patents

Abstract

The utility model discloses a printing half tone, printing device and photovoltaic module, printing half tone includes frame, version body and the silk screen of connecting frame and version body, and the version body has pattern district and non-pattern district, and non-pattern district lies in the edge of pattern district, and pattern district is at least partly fretwork; the plate body comprises a first side wall, a second side wall and an arc-shaped side wall, wherein the first side wall and the second side wall are arranged oppositely, and the arc-shaped side wall is connected with the first side wall and the second side wall respectively. Through the improvement to the version body structure to the pattern district and the non-pattern district of printing in-process half tone are out of shape under the effect of printing pressure and are kept unanimous basically, not only prevent because thick liquids mobility leads to the thick liquids problem of caving in, make the thick liquids height after the printing solidification keep unanimous, avoid because of leaking thick liquid and lead to printing thick line, turn white and the bad phenomenon of printing, improve the life of half tone and the yield of the photovoltaic cell piece after the printing, effectively promote the conversion efficiency of photovoltaic cell piece.

Description

Printing screen, printing device and photovoltaic module

Technical Field

The utility model relates to a photovoltaic module technical field, more specifically relates to a printing half tone, printing device and photovoltaic module.

Background

A photovoltaic cell is a photoelectric semiconductor sheet which directly generates electricity by using sunlight, and is also called as a solar chip or a photovoltaic cell. The photovoltaic cell piece can be subjected to the technical process of screen printing metallization in the production process, and carriers generated by the photovoltaic cell piece can be better led out through the grid line formed in the metallization process. The silk screen printing refers to that a silk screen is used as a plate base, and a silk screen printing plate with pictures and texts is manufactured by a photosensitive plate making method. The printing is carried out by utilizing the basic principle that meshes of image-text parts of the screen printing plate can be permeated by the slurry and meshes of non-image-text parts can not be permeated by the slurry. During printing, slurry is poured into one end of the screen printing plate, a scraper plate is used for applying certain pressure to the slurry position on the screen printing plate, meanwhile, the scraper plate moves towards the other end of the screen printing plate at a constant speed, and the slurry is extruded onto the photovoltaic cell sheet from meshes of the image-text part by the scraper plate in the moving process.

The existing screen printing method has the defect that the printed paste is easy to collapse when the surface of the photovoltaic cell is printed at a certain pressure and speed due to the high fluidity of the paste.

Therefore, it is desirable to provide a printing screen, a printing apparatus and a photovoltaic module capable of improving the paste collapse after printing.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a printing screen, including the frame, the version body and connect the silk screen of frame and version body, the version body has pattern district and non-pattern district, non-pattern district lies in the edge of pattern district, the pattern district is at least partly fretwork; the plate body comprises a first side wall, a second side wall and an arc-shaped side wall, wherein the first side wall and the second side wall are arranged oppositely, and the arc-shaped side wall is connected with the first side wall and the second side wall respectively.

Preferably, the outer frame includes a hollow frame body and a support member, a hollow hole is formed inside the hollow frame body, and the support member is disposed in the hollow hole and is fixedly connected with the hollow frame body.

Preferably, the cross section of the hollow frame body along the first direction is rectangular, the cross section of the support member along the first direction is X-shaped, four ends of the support member are respectively connected to four inner corners of the hollow frame body having the rectangular cross section, and the first direction is perpendicular to the first side wall.

Preferably, the plane of the arc-shaped side wall and the plane of the second side wall form a first included angle, and the first included angle ranges from +15 degrees to +90 degrees or from-15 degrees to-90 degrees.

Preferably, the plate body further comprises clamping devices, and the clamping devices are arranged at the four corners of the plate body; the clamping device comprises a clamping pad, a clamping plate, a clamping motor and a power column, wherein the clamping pad is arranged on the inner side of the clamping plate, and the clamping motor is arranged on the outer side of the clamping plate through the power column.

Preferably, the pattern area comprises a plurality of meshes penetrating through the plate body, and the inner walls of the meshes are arc-shaped inner walls.

Preferably, the arc-shaped inner wall is provided with a slip-assisting layer, and the slip-assisting layer is made of a nano coating and/or a nickel layer.

Preferably, the plane of the arc-shaped inner wall and the plane of the second side wall form a second included angle, and the second included angle ranges from +1 degrees to +50 degrees or from-1 degrees to-50 degrees.

The utility model also provides a printing device, which comprises a positioning area, a printing area and a checking area which are arranged in sequence, and a transmission mechanism; the printing area comprises a screen bracket, the printing screen rotatably connected with the screen bracket and a scraper movably connected with the screen bracket through a scraper cylinder.

The utility model also provides a photovoltaic module, photovoltaic module include the photovoltaic cell piece that matches with above-mentioned printing device.

Compared with the prior art, the utility model provides a pair of printing half tone, printing device and photovoltaic module has realized following beneficial effect at least:

the utility model provides a pair of printing half tone, printing device and photovoltaic module, printing half tone include frame, version body and connect the silk screen of frame and version body, and the silk screen can improve the joint strength between frame and the version body to guarantee the overall structure's of printing half tone stability. By arranging the plate body in a partitioning manner to form a pattern area and a non-pattern area, wherein the non-pattern area is positioned at the edge of the pattern area, slurry is poured into the surface of the plate body during printing, certain pressure is applied to the plate body by utilizing the moving extrusion of a scraper, so that the slurry is extruded onto a photovoltaic cell sheet in a photovoltaic module by the scraper from a hollow area of the pattern area during moving, the deformation of the non-pattern area at the edge of the pattern area is larger due to larger printing pressure during the actual printing process, and through the improvement of the structure of the plate body, the plate body comprises a first side wall and a second side wall which are oppositely arranged and an arc-shaped side wall which is respectively connected with the first side wall and the second side wall, so that during the printing process, the arc-shaped side wall can bear larger load compared with the conventional vertical side wall, so that the deformation of a pattern area and a non-pattern area of the screen printing plate is basically kept consistent under the action of printing pressure in the printing process, the excessive ink amount of printing slurry in the pattern area is basically the same, the problem of slurry collapse caused by slurry fluidity is prevented, printing burrs are reduced, the height of the slurry after printing and curing is kept consistent, the phenomenon that the deformation of the non-pattern area of the screen printing plate is larger than that of the pattern area can be avoided, slurry leakage is caused and thick printing lines, the phenomena of whitening and poor printing are caused, the problem of plate explosion is easily caused, the service life of the screen printing plate is prolonged, the yield of a printed photovoltaic cell is improved, and the conversion efficiency of the photovoltaic cell is effectively improved.

Of course, it is not necessary for any product of the present invention to achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a printing screen provided by the present invention;

fig. 2 is a schematic diagram of a plate structure of a printing screen provided by the present invention;

fig. 3 is a cross-sectional view of an outer frame of a printing screen provided by the present invention;

fig. 4 is a schematic structural view of a clamping device of a printing screen provided by the present invention;

fig. 5 is a schematic view of an overall structure of a printing apparatus provided by the present invention;

fig. 6 is a schematic view of an overall structure of a photovoltaic module provided by the present invention;

fig. 7 is a schematic view of the overall structure of a photovoltaic cell provided by the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The existing screen printing method has the defect that the printed paste is easy to collapse when the surface of the photovoltaic cell is printed at a certain pressure and speed due to the high fluidity of the paste.

Based on the research, the application provides a printing half tone, printing device and photovoltaic module, through the improvement to the version body structure, improves because the thick liquids mobility leads to the thick liquids problem of caving in to change in the printing of photovoltaic cell piece electrode, make the thick liquids height after the printing solidification keep unanimous, improve the production yield. The printing screen, the printing apparatus, and the photovoltaic module provided in the present application, which have the above-described technical effects, are described in detail as follows.

Referring to fig. 1 to 2, fig. 1 is a schematic diagram of a printing screen according to the present invention, fig. 2 is a schematic diagram of a plate structure of a printing screen according to the present invention, the present application provides a printing screen 000, which includes an outer frame 1, a plate 2, and a screen 3 connecting the outer frame 1 and the plate 2, the plate 2 has a pattern area 21 and a non-pattern area 22, the non-pattern area 22 is located at an edge of the pattern area 21, and the pattern area 21 is at least partially hollow; the plate body 2 includes a first side wall 23 and a second side wall 24 which are oppositely arranged, and an arc-shaped side wall 25 which connects the first side wall 23 and the second side wall 24, respectively.

It can be understood that the printing screen 000 includes the outer frame 1, the plate body 2 and the screen 3 connecting the outer frame 1 and the plate body 2, and the screen 3 can improve the connection strength between the outer frame 1 and the plate body 2, thereby ensuring the stability of the whole structure of the printing screen 000. The plate body 2 is generally manufactured through processes of etching, laser cutting, electroforming, electropolishing, etc., by setting the plate body 2 in a divisional manner to have the pattern region 21 and the non-pattern region 22, the non-pattern region 22 is located at an edge of the pattern region 21 to surround the pattern region 21, the plate body 2 in the printing screen 000 is poured with paste during printing and applies printing pressure to the plate body 2, the paste is pressed from a hollowed-out region of the pattern region 21 onto a structure to be printed, the non-pattern region 22 located at an edge of the pattern region 21 during actual printing is deformed more due to greater printing pressure, and by improving the structure of the plate body 2, the plate body 2 includes first and second sidewalls 23 and 24 which are oppositely arranged and an arc-shaped sidewall 25 connecting the first and second sidewalls 23 and 24, respectively, so that during printing, the pattern region 21 and the non-pattern region 22 of the screen can bear a greater load than a conventional vertical sidewall, so that the pattern region 21 and the non-pattern region 22 of the screen can be subjected to a greater than a conventional vertical sidewall, thereby maintaining a substantially uniform printing pressure, and preventing a problem of a thick paste printing paste flowing out and causing a printing paste collapse, thereby preventing a printing paste collapse, and preventing a problem of a thick line printing paste area from being deformed.

It should be noted that the arrangement mode of at least partially hollowing out the pattern region 21 includes a mode of completely hollowing out the pattern region 21, and also includes a mode of partially hollowing out the pattern region 21. The hollow shape of the pattern area 21 may be various, so as to present various patterns, which is not limited herein. The material of the pattern region 21 and the non-pattern region 22 may be polyurethane, which has good stability, chemical resistance, resilience and mechanical properties, and is easy to obtain.

Optionally, please refer to fig. 1 to 3, and fig. 3 is a cross-sectional view of an outer frame of a printing screen according to the present invention, in which the outer frame 1 includes a hollow frame 11 and a supporting member 12, a hollow hole 13 is formed inside the hollow frame 11, and the supporting member 12 is disposed in the hollow hole 13 and fixedly connected to the hollow frame 11.

It can be understood that the printing screen 000 includes the outer frame 1, the plate body 2 and the screen 3 connecting the outer frame 1 and the plate body 2, and the screen 3 can improve the connection strength between the outer frame 1 and the plate body 2, thereby ensuring the stability of the whole structure of the printing screen 000. The outer frame 1 includes a hollow frame 11 and a support member 12, a hollow hole 13 is formed inside the hollow frame 11, and the support member 12 is disposed in the hollow hole 13 and is fixedly connected to the hollow frame 11. More specifically, the supporting member 12 connected to the hollow frame 11 is disposed in the hollow hole 13 formed inside the hollow frame 11, the supporting member 12 is equivalent to a built-in reinforcing rib, and the supporting member 12 supports the hollow frame 11, so that the overall structural strength of the outer frame 1 is greater, the tension value of the outer frame 1 is stable, and the stability and the usability of the printing screen 000 are greatly ensured.

Alternatively, referring to fig. 1 to 3, a cross section of the hollow frame 11 along the first direction X is rectangular, a cross section of the supporting member 12 along the first direction X is X-shaped, four ends of the supporting member 12 are respectively connected to four inner corners of the hollow frame 11 having the rectangular cross section, and the first direction X is a direction perpendicular to the first side wall 23.

It can be understood that the printing screen 000 includes the outer frame 1, the plate body 2 and the screen 3 connecting the outer frame 1 and the plate body 2, and the screen 3 can improve the connection strength between the outer frame 1 and the plate body 2, thereby ensuring the stability of the whole structure of the printing screen 000. The outer frame 1 includes a hollow frame 11, a hollow hole 13 is formed inside the hollow frame 11, a support member 12 connected to the hollow frame 11 is provided in the hollow hole 13 formed inside the hollow frame 11, and the support member 12 supports the hollow frame 11. The cross section of the hollow frame 11 along the first direction X is rectangular, that is, the cross section along a direction perpendicular to the first sidewall 23 at any position of the hollow frame 11 is rectangular. The cross section of the support member 12 along the first direction X is X-shaped, and likewise, the cross section along the direction perpendicular to the first side wall 23 at any position of the support member 12 is X-shaped. The cross-section is rectangular's hollow frame 11 has four inside corners, and the support piece 12 that the cross-section is X-shaped has four ends, and four ends of support piece 12 connect respectively in four inside corners of hollow frame 11, like this for the cross-section of hollow frame 11 and support piece 12 that link together forms latticedly, so, make frame 1 overall structure intensity bigger, guarantee that the tension value of frame 1 is stable, has greatly ensured printing half tone 000's stability and usability.

Optionally, referring to fig. 2, the arc-shaped sidewall 25 and the second sidewall 24 form a first included angle, and the first included angle ranges from +15 ° to +90 ° or from-15 ° to-90 °.

It can be understood that, by arranging the plate body 2 in a partitioned manner to have the pattern area 21 and the non-pattern area 22, the non-pattern area 22 is located at the edge of the pattern area 21 to surround the pattern area 21, the plate body 2 in the printing screen 000 is poured with the slurry during printing, and the printing pressure is applied to the plate body 2, the slurry is extruded from the hollow area of the pattern area 21 onto the structure to be printed, the non-pattern area 22 located at the edge of the pattern area 21 during actual printing is subjected to a larger printing pressure to cause a larger deformation, and by modifying the structure of the plate body 2, the plate body 2 includes a first side wall 23 and a second side wall 24 which are oppositely arranged and an arc-shaped side wall 25 which connects the first side wall 23 and the second side wall 24, respectively, the arc-shaped side wall 25 has a first included angle with the plane of the second side wall 24, and the first included angle ranges from +15 ° to +90 ° or from-15 °. For example, the first included angle α may range from +20 °, +40 °, +60 °, and +70 °, or-20 °, -40 °, -60 °, and-70 °. Therefore, in the printing process, the arc-shaped side wall 25 can bear larger load compared with the conventional vertical side wall, so that the deformation of the pattern area 21 and the non-pattern area 22 of the screen printing plate is basically kept consistent under the action of printing pressure in the printing process, the ink passing amount of printing slurry in the pattern area 21 is basically the same, the problem of slurry collapse caused by slurry fluidity can be prevented, printing burrs are reduced, the height of the slurry after printing and curing is kept consistent, the phenomenon that the deformation of the non-pattern area 22 is larger than that of the pattern area 21, slurry leakage is caused, printing thick lines, whitening and poor printing are caused, the problem of plate explosion is avoided, and the service life of the printing screen printing plate 000 is prolonged.

Optionally, please refer to fig. 4, fig. 4 is a schematic structural diagram of a clamping device of a printing screen provided by the present invention, the plate body 2 further includes a clamping device 4, and the clamping device 4 is installed at four corners of the plate body 2; the clamping device 4 includes a clamping pad 41, a clamping plate 42, a clamping motor 43, and a power column 44, the clamping pad 41 being mounted on the inner side of the clamping plate 42, the clamping motor 43 being mounted on the outer side of the clamping plate 42 via the power column 44.

It can be understood that the printing screen 000 includes the outer frame 1, the plate body 2 and the silk screen 3 connecting the outer frame 1 and the plate body 2, and the silk screen 3 can improve the connection strength between the outer frame 1 and the plate body 2, thereby ensuring the stability of the whole structure of the printing screen 000. The plate body 2 comprises clamping devices 4, the clamping devices 4 are arranged at four corners of the plate body 2, each clamping device 4 comprises a clamping pad 41, a clamping plate 42, a clamping motor 43 and a power column 44, the clamping pads 41 are arranged on the inner sides of the clamping plates 42, and the clamping motors 43 are arranged on the outer sides of the clamping plates 42 through the power columns 44. In actual operation, thereby start clamping motor 43 drive power post 44, thereby it presss from both sides tightly accurately to control the removal of clamping plate 42 through the power post 44 of installing in the outside of clamping plate 42 at the clamping process, presss from both sides tight pad 41 and can adopt the foam-rubber cushion, is favorable to the better clamping work who realizes clamping device 4, prevents that the version body 2 from damaging, improves the quality of product.

Optionally, please refer to fig. 2, fig. 5 to fig. 7, fig. 5 is a schematic diagram of an overall structure of a printing apparatus provided by the present invention, fig. 6 is a schematic diagram of an overall structure of a photovoltaic module provided by the present invention, fig. 7 is a schematic diagram of an overall structure of a photovoltaic cell provided by the present invention, the pattern area 21 includes a plurality of meshes 26 penetrating through the plate body 2, and an inner wall of the mesh 26 is an arc inner wall 261.

It will be appreciated that the printing screen 000 comprises a plate body 2, the plate body 2 being provided with a patterned area 21 and a non-patterned area 22 by zoning the plate body 2, the patterned area 21 comprising a plurality of mesh openings 26 extending through the plate body 2, the mesh openings 26 having opposed inlets 263 and outlets 264. When the screen printing plate 000 is applied to printing the photovoltaic cell 200 in the photovoltaic module 300, before printing, the paste can be coated on the surface of the plate body 2, and the paste is ensured to be positioned around the inlet 263 of the mesh 26; during printing, the doctor blade 105 arranged near the inlet 263 can be used for pressing slurry to flow into the meshes 26 from the inlet 263 of the meshes 26 and flow out of the meshes 26 from the outlet 264 of the meshes 26 by the moving of the doctor blade 105, the meshes 26 are arranged on the plate body 2 in an array, for example, a plurality of meshes 26 arranged on the plate body 2 in an array comprise a plurality of rows of meshes 26 and a plurality of columns of meshes 26, at the moment, the meshes 26 in the same row or the same column correspond to one grid line 201, and the slurry printing of a plurality of grid lines 201 on the photovoltaic cell sheet 200 can be completed by using the plurality of rows or the plurality of columns of meshes 26. The inner wall of mesh 26 is arc inner wall 261, and behind the thick liquids got into mesh 26 for thick liquids gathered certain volume in mesh 26 middle zone, again relied on self gravity to continue to flow into export 264, thereby guarantee that thick liquids print to grid line 201 with bigger impact force on, in order to reduce the thick liquids of printing to grid line 201 and take place the possibility of virtual seal, improve the yield of the photovoltaic cell piece 200 after the printing.

Optionally, referring to fig. 2, the arc-shaped inner wall 261 is provided with a sliding-assisting layer 262. The material of the sliding layer 262 can be a nano coating, a nickel layer or a composite layer formed by the nano coating and the nickel layer. Be the nano coating with the material, the nickel coating or by the nano coating and the nickel coating when the layer 262 of helping of the composite bed that the nickel coating formed coats on arc inner wall 261, not only can improve arc inner wall 261's smoothness, the effectual thick liquids adhesion of avoiding is on mesh inner wall 261, thereby avoid the virtual seal that leads to because of thick liquids block up mesh 26, can also improve arc inner wall 261's hardness, and then improve arc inner wall 261's resistance to deformation, under the effect of the impact force of thick liquids, mesh 26 is difficult for taking place like deformation such as indent, therefore, can improve printing half tone 000's life.

It should be noted that the sliding assistance layer 262 in this embodiment may completely cover the arc-shaped inner wall 261, or may partially cover the arc-shaped inner wall 261. In addition, the material of the sliding layer 262 may also be epoxy resin.

Optionally, referring to fig. 2, a second included angle θ is formed between the arc-shaped inner wall 261 and the plane of the second side wall 24, and the second included angle θ ranges from +1 ° to +50 ° or from-1 ° to-50 °.

It will be appreciated that the printing screen 000 comprises a plate body 2, the plate body 2 being provided with a patterned area 21 and a non-patterned area 22 by zoning the plate body 2, the patterned area 21 comprising a plurality of mesh openings 26 extending through the plate body 2, the mesh openings 26 having opposed inlets 263 and outlets 264. When the screen printing plate 000 is applied to printing the photovoltaic cell 200, before printing, the paste can be coated on the surface of the plate body 2, and the paste is ensured to be positioned around the inlets 263 of the meshes 26; during printing, the doctor blade 105 arranged near the inlet 263 is used for pressing the slurry to flow into the meshes 26 from the inlet 263 of the meshes 26 and flow out of the meshes 26 from the outlet 264 of the meshes 26 by the movement of the doctor blade 105, the meshes 26 are arranged on the plate body 2 in an array, for example, the plurality of meshes 26 arranged on the plate body 2 in an array comprise a plurality of rows of meshes 26 and a plurality of columns of meshes 26, at this time, the meshes 26 in the same row or the same column correspond to one grid line 201, and the slurry printing of a plurality of grid lines 201 on the photovoltaic cell sheet 200 can be completed by using the plurality of rows or the plurality of columns of meshes 26. The inner wall of the mesh 26 is an arc-shaped inner wall 261, a second included angle theta is formed between the plane where the arc-shaped inner wall 261 and the second side wall 24 are located, and the range of the second included angle theta is +1 degree to +50 degrees or-1 degree to-50 degrees. For example, the second included angle θ may range from +20 °, +40 °, and +50 °, or-20 °, -40 °, and-50 °. After the slurry enters the mesh 26, the slurry is gathered to a certain amount in the middle area of the mesh 26 and then continuously flows into the outlet 264 by means of the gravity of the slurry, so that the slurry is printed on the grid line 201 by a larger impact force, the possibility of virtual printing of the slurry printed on the grid line 201 is reduced, and the yield of the printed photovoltaic cell sheet 200 is improved.

Referring to fig. 5, an embodiment of the present invention further provides a printing apparatus 100, which includes a positioning area 101, a printing area 102, an inspection area 106, and a conveying mechanism 107; the printing zone 102 comprises a screen carrier 103, a printing screen 000 according to any of the embodiments of the present invention rotatably connected to the screen carrier 103, and a doctor 105 movably connected to the screen carrier 103 by a doctor cylinder 104.

It is understood that the structure to be printed enters the positioning area 101 of the printing device 100, and the positioning area 101 can precisely position the structure to be printed; the transport mechanism 107 transports the positioned structure to be printed into the printing area 102; when the conveying mechanism 107 conveys the structure to be printed to the position below the plate body 2 of the printing screen 000 which is rotatably connected with the screen bracket 103, closing the conveying mechanism 107 and stopping conveying the structure to be printed; before printing, coating slurry on the surface of the plate body 2, and ensuring that the slurry is positioned around the hollow-out area of the pattern area 21; when printing, the doctor blade cylinder 104 is used to control the doctor blade 105 to move back and forth left and right to press the pattern area 21 and the non-pattern area 22 of the plate body 2 so as to apply a certain pressure to the plate body 2, so that the paste is pressed by the doctor blade 105 from the hollow area of the pattern area 21 of the plate body 2 onto the structure to be printed. Because the non-pattern area 22 at the edge of the pattern area 21 is subjected to larger printing pressure in the printing process, the deformation of the non-pattern area 22 is larger, and the arc-shaped side wall 25 of the plate body 2 can bear larger load compared with the conventional vertical side wall in the printing process, so that the deformation of the pattern area 21 and the deformation of the non-pattern area 22 are basically kept consistent under the action of the printing pressure in the printing process, the ink passing amount of printing slurry in the pattern area 21 is basically the same, the problem of slurry collapse caused by slurry fluidity is prevented, printing burrs are reduced, the height of the slurry after printing and curing is kept consistent, the problem that slurry leakage is caused and printing thick lines, white spots and poor printing are caused due to the fact that the deformation of the non-pattern area 22 is larger than that of the pattern area 21 is relieved and avoided, the problem of plate explosion is easily caused, and the service life of the printing screen plate 000 is prolonged; after the printing is completed, the transport mechanism 107 conveys the to-be-printed structure whose printing is completed from the printing area 102 to the inspection area 106, and the printing quality of the to-be-printed structure is inspected.

Referring to fig. 6 and fig. 7, the embodiment of the present invention further provides a photovoltaic module 300, where the photovoltaic module 300 includes a photovoltaic cell sheet 200 matched with the printing apparatus 100 provided by any embodiment of the present invention.

The photovoltaic module 300 includes a front side encapsulant layer 202, a first encapsulant film 203, a photovoltaic cell sheet 200, a second encapsulant film 204, and a back side encapsulant layer 205, which are sequentially disposed. In practical operation, the photovoltaic cell sheet 200 enters the positioning area 101 in the printing device 100, and the positioning area 101 can accurately position the photovoltaic cell sheet 200; the conveying mechanism 107 conveys the photovoltaic cell pieces 200 which are positioned completely into the printing area 102; when the conveying mechanism 107 conveys the photovoltaic cell 200 to the position below the plate body 2 of the printing screen 000 which is rotatably connected with the screen bracket 103, closing the conveying mechanism 107 to stop conveying the photovoltaic cell 200, coating slurry on the surface of the plate body 2 before printing, and ensuring that the slurry is positioned around the hollow-out area of the pattern area 21; during printing, the scraper cylinder 104 is used for controlling the scraper 105 to move left and right back and forth to extrude so as to apply certain pressure on the plate body 2, so that the paste is extruded onto the photovoltaic cell piece 200 by the scraper 105 from the hollowed-out area of the pattern area 21, the hollowed-out area of the pattern area 21 can be meshes 26 arranged on the plate body 2 in an array mode, each mesh 26 comprises a plurality of rows of meshes 26 and a plurality of columns of meshes 26, at the moment, the meshes 26 in the same row or column correspond to one grid line 201, and paste printing of the grid lines 201 on the photovoltaic cell piece 200 is completed by the aid of the plurality of rows or columns of meshes 26; because the non-pattern area 22 at the edge of the pattern area 21 is subjected to larger printing pressure in the printing process, the deformation of the non-pattern area 22 is larger, and the arc-shaped side wall 25 of the plate body 2 can bear larger load compared with the conventional vertical side wall in the printing process, the deformation of the pattern area 21 and the deformation of the non-pattern area 22 are basically kept consistent under the action of the printing pressure, so that the ink excess amount of printing slurry in the printing slurry area 21 is basically the same, the problem of slurry collapse caused by slurry fluidity is prevented, printing burrs are reduced, the height of the slurry after printing and curing is kept consistent, the deformation of the non-pattern area 22 larger than that of the pattern area 21 is relieved and avoided, the phenomena of slurry leakage, printing thick lines, white spots and poor printing are caused, the problem of plate explosion is easily caused, and the service life of a screen printing plate 000 is prolonged; after the printing is completed, the transport mechanism 107 transports the photovoltaic cell sheet 200, whose printing is completed, from the printing area 102 to the inspection area 106, and the printing quality of the photovoltaic cell sheet 200 is inspected.

The printing method includes, but is not limited to, primary printing, and may be secondary printing. The paste may be any one of silver paste, aluminum paste, and silver-aluminum paste, and is not limited herein.

According to the above embodiment, the utility model provides a pair of printing half tone, printing device and photovoltaic module has realized following beneficial effect at least:

the utility model provides a pair of printing half tone, printing device and photovoltaic module, printing half tone include frame, version body and connect the silk screen of frame and version body, and the silk screen can improve the joint strength between frame and the version body to guarantee the overall structure's of printing half tone stability. By arranging the plate body in a partitioning manner to form a pattern area and a non-pattern area, wherein the non-pattern area is positioned at the edge of the pattern area, slurry is poured into the surface of the plate body during printing, certain pressure is applied to the plate body by utilizing the moving extrusion of a scraper, so that the slurry is extruded onto a photovoltaic cell sheet in a photovoltaic module by the scraper from a hollow area of the pattern area during moving, the deformation of the non-pattern area at the edge of the pattern area is larger due to larger printing pressure during the actual printing process, and through the improvement of the structure of the plate body, the plate body comprises a first side wall and a second side wall which are oppositely arranged and an arc-shaped side wall which is respectively connected with the first side wall and the second side wall, so that during the printing process, the arc-shaped side wall can bear larger load compared with the conventional vertical side wall, so that the deformation of a pattern area and a non-pattern area of the screen printing plate is basically kept consistent under the action of printing pressure in the printing process, the excessive ink amount of printing slurry in the pattern area is basically the same, the problem of slurry collapse caused by slurry fluidity is prevented, printing burrs are reduced, the height of the slurry after printing and curing is kept consistent, the phenomenon that the deformation of the non-pattern area of the screen printing plate is larger than that of the pattern area can be avoided, slurry leakage is caused and thick printing lines, the phenomena of whitening and poor printing are caused, the problem of plate explosion is easily caused, the service life of the screen printing plate is prolonged, the yield of a printed photovoltaic cell is improved, and the conversion efficiency of the photovoltaic cell is effectively improved.

Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. A printing half tone, its characterized in that: the silk screen printing plate comprises an outer frame, a plate body and a silk screen for connecting the outer frame and the plate body, wherein the plate body is provided with a pattern area and a non-pattern area, the non-pattern area is positioned at the edge of the pattern area, and at least part of the pattern area is hollowed out;

the plate body comprises a first side wall and a second side wall which are oppositely arranged and an arc-shaped side wall which is respectively connected with the first side wall and the second side wall.

2. The printing screen of claim 1, wherein: the outer frame comprises a hollow frame body and a supporting piece, a hollow hole is formed in the hollow frame body, and the supporting piece is arranged in the hollow hole and fixedly connected with the hollow frame body.

3. A printing screen according to claim 2, wherein: the cross section of the hollow frame body along the first direction is rectangular, the cross section of the support piece along the first direction is X-shaped, four tail ends of the support piece are respectively connected to four inner corner portions of the hollow frame body, the cross section of the support piece is rectangular, and the first direction is perpendicular to the direction of the first side wall.

4. The printing screen of claim 1, wherein: the plane where the arc-shaped side wall and the second side wall are located has a first included angle, and the first included angle ranges from +15 degrees to +90 degrees or from-15 degrees to-90 degrees.

5. The printing screen of claim 1, wherein: the plate body further comprises clamping devices, and the clamping devices are arranged at the four corners of the plate body; the clamping device comprises a clamping pad, a clamping plate, a clamping motor and a power column, wherein the clamping pad is arranged on the inner side of the clamping plate, and the clamping motor is arranged on the outer side of the clamping plate through the power column.

6. The printing screen of claim 1, wherein: the pattern area comprises a plurality of meshes which penetrate through the plate body, and the inner walls of the meshes are arc-shaped inner walls.

7. The printing screen of claim 6, wherein: the arc-shaped inner wall is provided with a sliding-assisting layer, and the sliding-assisting layer is made of a nano coating and/or a nickel layer.

8. The printing screen of claim 6, wherein: the plane where the arc-shaped inner wall and the second side wall are located has a second included angle, and the second included angle ranges from +1 degrees to +50 degrees or from-1 degrees to-50 degrees.

9. A printing device is characterized by comprising a positioning area, a printing area, an inspection area and a conveying mechanism which are arranged in sequence; the printing zone comprises a screen carrier, a printing screen according to any one of claims 1 to 8 rotatably connected to the screen carrier, and a doctor blade movably connected to the screen carrier by a doctor blade cylinder.

10. A photovoltaic module comprising a photovoltaic cell sheet adapted to mate with the printing apparatus of claim 9.

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