Pattern screen printing plate and silk screen printing plate

Abstract

The utility model relates to a graphic screen printing plate and a silk screen printing plate. The graphic screen printing plate comprises a plate body and grid lines located in the plate body, chamfers are arranged on the outer edge of the plate body, and the outer surfaces of the chamfers are bent surfaces. The graphic screen printing plate comprises a plate body and grid lines located in the plate body, chamfers are arranged on the outer edge of the plate body, and the outer surfaces of the chamfers are bent surfaces. The silk screen printing plate comprises a screen frame and the graphic screen printing plate, and the screen frame is located on the outer edge of the graphic screen printing plate.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a graphic screen and a silk-screen screen. Background Art

[0002] In the process of making solar cells, screen printing is a common method for making grid lines. When screen printing is performed, a screen printing screen is used to print the slurry on the surface of the cell. The screen printing screen usually includes a screen frame and a graphic screen located inside the screen frame, and the graphic screen usually has a chamfered structure. The chamfer of the traditional graphic screen is a plane. During the screen printing process, due to the interaction force between the scraper and the graphic screen, the chamfer of the graphic screen is prone to warping. When the chamfer of the graphic screen is warped, the warped position is prone to slurry leakage, affecting the quality of screen printing. Utility Model Content

[0003] Based on this, it is necessary to provide a graphic screen and a silk screen screen that can reduce the risk of chamfer warping.

[0004] In a first aspect, the present application provides a graphic screen, wherein the graphic screen comprises a plate body and grid lines located in the plate body, wherein the outer edge of the plate body has a chamfer, and the outer surface of the chamfer is a bent surface.

[0005] In the above-mentioned graphic screen, the outer surface of the chamfer is set as a bending surface, which can increase the contact area between the scraper and the chamfer during screen printing, increase the force area of ​​the chamfer, and reduce the pressure on the chamfer during printing, thereby reducing the risk of chamfer warping and improving the quality of screen printing.

[0006] In some embodiments, the chamfer includes a plurality of bending units connected in sequence; the bending unit includes a main body, a first bending portion and a second bending portion connected in sequence; the main body and the second bending portion are respectively located on opposite sides of the first bending portion; in adjacent bending units, the second bending portion and the main body are connected.

[0007] In some embodiments, outer surfaces of the main bodies of the bending units are located in the same plane.

[0008] In some embodiments, outer surfaces of the first bending portions of the bending units are parallel to each other.

[0009] In some embodiments, outer surfaces of the second bending portions of the bending units are parallel to each other.

[0010] In some embodiments, the angle formed between the main body and the first bending portion is an obtuse angle, and the angle formed between the second bending portion and the first bending portion is less than or equal to 90°.

[0011] In some embodiments, the plate body has four corners, and all four corners are chamfered.

[0012] In some embodiments, the gate lines include chamfered gate lines and main gate lines; the chamfered gate lines are located in the chamfered area, and the main gate lines are located in the area outside the chamfered area; the chamfered area is the area enclosed by the long projection and wide projection of the chamfer at both ends and the chamfer; the width of the chamfered gate lines is 2μm~5μm larger than the width of the main gate lines.

[0013] The second aspect of the present application provides a silk screen printing plate, wherein the silk screen printing plate comprises a screen frame and the graphic screen, wherein the screen frame is located at the outer edge of the graphic screen to package the graphic screen.

[0014] In some embodiments, the silk screen screen further includes a protection pad; the protection pad covers the chamfer and the screen frame.

[0015] In some embodiments, the distance between the protection pad and the graphic area of ​​the graphic screen is 8 μm to 12 μm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of a graphic screen in one embodiment of the present application.

[0017] Figure 2 for Figure 1 A local enlarged view of point A in the figure, where point A represents the position of the elliptical dotted box.

[0018] Figure 3 for Figure 1 A local enlarged view of point B in the figure, where point B represents the position of the rectangular dotted box.

[0019] Figure 4 for Figure 1 Schematic diagram of the structure of the bending unit in the corresponding graphic screen.

[0020] Figure 5 It is a schematic diagram of the structure of the silk screen printing screen in one embodiment of the present application.

[0021] Figure 6 This is a schematic diagram of the structure of a silk screen printing plate in another embodiment of the present application.

[0022] Description of the markings in the figure:

[0023] 10. Graphic screen; 101. Screen body; 1011. Chamfered area; 102. Grid lines; 1021. Chamfered grid lines; 1022. Main grid lines; 103. Chamfers; 1031. Bending unit; 10311. Main body; 10312. First bending portion; 10313. Second bending portion; 20. Silk screen; 201. Screen frame; 202. Protective pad; 30. Graphic area; 40. Non-graphic area. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] See also Figure 1~Figure 3 In one embodiment of the present application, a graphic screen 10 is provided. The graphic screen 10 comprises a plate body 101 and grid lines 102 located in the plate body 101. The outer edge of the plate body 101 has a chamfer 103, and the outer surface of the chamfer 103 is a bent surface.

[0030] In the graphic screen 10 of the present embodiment, the outer surface of the chamfer 103 is set as a bending surface, which can increase the contact area between the scraper and the chamfer 103 during the screen printing process, increase the force area of ​​the chamfer 103, and reduce the pressure on the chamfer 103 during the printing process, thereby reducing the risk of the chamfer 103 warping up and improving the screen printing quality.

[0031] Furthermore, when the chamfer on the graphic screen is lifted, the quality of screen printing is usually difficult to meet the standards. In this case, a new graphic screen needs to be replaced for screen printing. In this embodiment, by designing the chamfer 103 and setting the outer surface of the chamfer 103 as a bending surface, the risk of the chamfer 103 lifting during screen printing can be reduced, thereby making the graphic screen 10 have a longer service life, which is conducive to reducing the replacement frequency of the graphic screen 10 during screen printing and reducing the screen cost of screen printing.

[0032] It can be understood that the grid lines 102 in the plate 101 indicate that during the screen printing process, the paste can pass through the grid lines 102 to form corresponding pattern paste on the surface of the battery cell, thereby forming corresponding grid lines on the surface of the battery cell.

[0033] It is also understandable that the distribution of the gate lines 102 can be determined according to the design requirements of the battery cell, and conventional design methods can be used.

[0034] See also Figure 2 and Figure 4In some embodiments, the chamfer 103 includes a plurality of bending units 1031 connected in sequence. The bending unit 1031 includes a main body 10311, a first bending portion 10312, and a second bending portion 10313 connected in sequence. The main body 10311 and the second bending portion 10313 are respectively located on opposite sides of the first bending portion 10312. In adjacent bending units 1031, the second bending portion 10313 is connected to the main body 10311. By providing a plurality of bending units 1031, the force-bearing area of ​​the chamfer 103 can be further increased, the pressure on the chamfer 103 during printing can be reduced, and the risk of the chamfer 103 warping can be reduced. It is understandable that, please refer to Figure 4 , the main body 10311 and the second bending portion 10313 are respectively located on opposite sides of the first bending portion 10312, indicating that the main body 10311 and the second bending portion 10313 extend in opposite directions from both ends of the first bending portion 10312 respectively.

[0035] In some embodiments, the outer surfaces of the main body 10311 of each bending unit 1031 are located in the same plane. This can make the outer surface of the chamfer 103 more neat, which is conducive to improving the appearance quality of the graphic screen 10. In some embodiments, the outer surfaces of the main body 10311 of each bending unit 1031 are parallel to each other.

[0036] In some embodiments, the outer surfaces of the first bending portions 10312 of the bending units 1031 are parallel to each other. In this case, the outer surfaces of the first bending portions 10312 of the bending units 1031 can be made more regular, which is beneficial to further improve the appearance quality of the graphic screen 10.

[0037] In some embodiments, the outer surfaces of the second bending portions 10313 of each bending unit 1031 are parallel to each other. The outer surfaces of the first bending portions 10312 of each bending unit 1031 are parallel to each other, which can make the outer surfaces of the second bending portions 10313 of each bending unit 1031 more regular, which is conducive to further improving the appearance quality of the graphic screen 10.

[0038] In some embodiments, in each bending unit 1031, the angle formed between the main body 10311 and the first bending portion 10312 is an obtuse angle, and the angle formed between the second bending portion 10313 and the first bending portion 10312 is less than or equal to 90°. Figure 4In the figure, the angle formed between the main body 10311 and the first bending portion 10312, and the angle formed between the second bending portion 10313 and the first bending portion 10312 are illustrated. Among them, the angle formed between the main body 10311 and the first bending portion 10312 is α, and α is an obtuse angle. The angle formed between the second bending portion 10313 and the first bending portion 10312 is β, and β≤90°. Optionally, α can be 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, etc. It is understandable that α can also be selected in the range of 90°~180°. Optionally, β can be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, etc. It is understandable that β can also be selected in the range of 0~90°.

[0039] In some embodiments, the plate body 101 has four corners, and all of the four corners are chamfered 103. It is understandable that the plate body 101 is generally rectangular, and the four corners of the plate body 101 are chamfered 103, which is beneficial to improving the regularity of the appearance of the graphic screen 10 on the one hand, and on the other hand, the warping problem of the four corners of the plate body 101 can be well improved, reducing the risk of warping at the four corners of the plate body 101, which is beneficial to further improve the quality of screen printing, and further beneficial to extend the service life of the graphic screen 10.

[0040] Please refer again Figure 3 In some embodiments, the gate line 102 includes a chamfered gate line 1021 and a main gate line 1022, wherein the chamfered gate line 1021 is located in the chamfered area 1011, and the main gate line 1022 is located in an area outside the chamfered area 1011. The chamfered area 1011 is an area enclosed by the long projection and wide projection of the chamfer 103 at both ends and the chamfer 103. The width of the chamfered gate line 1021 is 2 μm to 5 μm larger than the width of the main gate line 1022. During the screen printing process, due to the high frequency of wiping by the scraper at the chamfer 103, the gate line corresponding to the chamfered gate line 1021 on the battery cell is more prone to broken gate problems than the gate lines in other areas. In this embodiment, the width of the chamfered gate line 1021 is set to be greater than the width of the main gate line 1022, which can reduce the risk of broken gates in the chamfered gate line 1021. At the same time, the difference between the width of the chamfered grid line 1021 and the width of the main grid line 1022 is within the range of 2μm to 5μm, which can reduce the risk of grid breakage of the chamfered grid line 1021 and maintain a relatively stable electrical performance of the grid line 102 on the cell. Optionally, the difference between the width of the chamfered grid line 1021 and the width of the main grid line 1022 can be 2μm, 3μm, 4μm, 5μm, etc. It is understandable that the difference between the width of the chamfered grid line 1021 and the width of the main grid line 1022 can also be selected in the range of 2μm to 5μm.

[0041] See also Figure 5 In another embodiment of the present application, a screen printing screen 20 is provided. The screen printing screen 20 comprises a screen frame 201 and the graphic screen 10 . The screen frame 201 is located at the outer edge of the graphic screen 10 to encapsulate the graphic screen 10 .

[0042] In the screen printing screen 20 of this embodiment, the screen frame 201 can provide good protection for the graphic screen 10, and it is also convenient to use the screen printing screen 20 during the screen printing process. The graphic screen 10 in the screen printing screen 20 has a long service life, and thus the screen printing screen 20 also has a long service life.

[0043] It is understandable that in the graphic halftone plate 10 , the plate body 101 can be divided into a graphic area 30 and a non-graphic area 40 . Optionally, the non-graphic area 40 surrounds the periphery of the graphic area 30 .

[0044] It is also understandable that the size and material of the screen frame 201 can be determined according to actual production requirements and can be set in a conventional manner.

[0045] See also Figure 6 In some embodiments, the screen printing screen 20 further includes a protective pad 202. The protective pad 202 covers the chamfer 103 and the screen frame 201. The provision of the protective pad 202 can further protect the chamfer 103 of the graphic screen 10, further reduce the risk of the chamfer 103 warping during the screen printing process, and further improve the quality of the screen printing.

[0046] It can be understood that the protection pad 202 covers the chamfer 103 and the screen frame 201 , which means that a portion of the protection pad 202 covers the chamfer 103 and another portion covers the screen frame 201 .

[0047] It can also be understood that in order to reduce the adverse effect of the protection pad 202 on the graphic area 30 on the graphic screen 10 , the protection pad 202 is disposed in the non-graphic area 40 of the graphic screen 10 .

[0048] In some embodiments, the distance between the protection pad 202 and the graphic area 30 of the graphic screen 10 is 8μm~12μm. The distance between the protection pad 202 and the graphic area 30 of the graphic screen 10 within this range can reduce the impact on the graphic area 30 on the basis of protecting the chamfer 103. If the distance between the protection pad 202 and the graphic area 30 of the graphic screen 10 is too small, the grid line 102 near the chamfer 103 may be uneven in thickness. When the distance between the protection pad 202 and the graphic area 30 of the graphic screen 10 is too large, it is difficult for the protection pad 202 to play a good protective effect. Optionally, the distance between the protection pad 202 and the graphic area 30 of the graphic screen 10 can be 8μm, 9μm, 10μm, 11μm, 12μm, etc. It is understandable that the distance between the protection pad 202 and the graphic area 30 of the graphic screen 10 can also be selected in the range of 8μm~12μm.

[0049] In some embodiments, the protection pads 202 correspond to the chamfers 103 one by one. The number of protection pads 202 corresponds to the number of chamfers 103 one by one, and each chamfer 103 corresponds to a protection pad 202. Figure 6 In the illustrated embodiment, the number of the protective pads 202 and the number of the chamfers 103 are both four. Optionally, the side of the protective pad 202 is parallel to the side of the graphic area 30 of the graphic screen 10. Further optionally, the shape of the protective pad 202 is a rectangle. Further further optionally, the protective pad 202 is a polyimide protective pad.

[0050] In some embodiments, the thickness of the protective pad 202 is 10 μm to 30 μm. The thickness of the protective pad 202 within this range can provide good protection for the chamfer 103 on the one hand, and will not cause excessive interference to the stroke of the scraper on the other hand, so that screen printing can proceed smoothly. Optionally, the thickness of the protective pad 202 can be 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm, 25 μm, 28 μm, 30 μm, etc. It is understandable that the thickness of the protective pad 202 can also be other options within the range of 10 μm to 30 μm.

[0051] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims, and the specification and drawings may be used to interpret the contents of the claims.

Claims

1. A graphic screen (10), characterized in that: It comprises a plate body (101) and grid lines (102) located in the plate body (101); the outer edge of the plate body (101) has a chamfer (103); and the outer surface of the chamfer (103) is a bent surface.

2. The graphic screen (10) according to claim 1, characterized in that: The chamfer (103) comprises a plurality of bending units (1031) connected in sequence; the bending unit (1031) comprises a main body (10311), a first bending portion (10312) and a second bending portion (10313) connected in sequence; the main body (10311) and the second bending portion (10313) are respectively located on opposite sides of the first bending portion (10312); in adjacent bending units (1031), the second bending portion (10313) and the main body (10311) are connected.

3. The graphic screen (10) according to claim 2, characterized in that: The outer surfaces of the main bodies (10311) of the bending units (1031) are located in the same plane.

4. The graphic screen (10) according to claim 3, characterized in that: The outer surfaces of the first bending portions (10312) of the bending units (1031) are parallel to each other; and / or, The outer surfaces of the second bending portions (10313) of each of the bending units (1031) are parallel to each other.

5. The graphic screen (10) according to claim 2, characterized in that: In each of the bending units (1031), the angle formed between the main body (10311) and the first bending portion (10312) is an obtuse angle, and the angle formed between the second bending portion (10313) and the first bending portion (10312) is less than or equal to 90°.

6. The graphic screen (10) according to claim 1, characterized in that: The plate body (101) has four corners, and the four corners are all chamfers (103).

7. The graphic screen (10) according to any one of claims 1 to 6, characterized in that: The gate lines (102) comprise chamfered gate lines (1021) and main gate lines (1022); the chamfered gate lines (1021) are located in a chamfered area (1011), and the main gate lines (1022) are located in an area outside the chamfered area (1011); the chamfered area (1011) is an area enclosed by a long projection and a wide projection of the chamfer (103) at both ends thereof and the chamfer (103); the width of the chamfered gate lines (1021) is 2 μm to 5 μm greater than the width of the main gate lines (1022).

8. A screen printing screen (20), characterized in that: It comprises a screen frame (201) and a graphic screen (10) according to any one of claims 1 to 7, wherein the screen frame (201) is located at the outer edge of the graphic screen (10) for packaging the graphic screen (10).

9. The screen printing screen (20) according to claim 8, characterized in that: The silk screen screen (20) further comprises a protective pad (202); the protective pad (202) covers the chamfer (103) and the screen frame (201).

10. The screen printing screen (20) according to claim 9, characterized in that: The distance between the protection pad (202) and the graphic area (30) of the graphic screen (10) is 8 μm to 12 μm.

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