Screen printing plate assembly and battery printing equipment

Abstract

The utility model belongs to the technical field of silk-screen printing, and particularly relates to a screen printing plate assembly and battery printing equipment, and the screen printing plate assembly comprises a screen printing plate body and a mounting unit, wherein a printing area is arranged on the screen printing plate body, and the mounting unit is mounted on the screen printing plate body and located on the outer side of the printing area; the mounting units are arranged on the two sides of the printing area for protection, tension is relatively increased and deformation is smaller due to stretching of the mounting units on the two sides in the printing process, and due to height supporting of the mounting units on the two sides, a smaller distance can be achieved when the plate distance is set, so that deformation is further reduced, and the printing quality is improved. The external expansion amount of the screen printing plate can be reduced so as to prolong the service life of the screen printing plate, meanwhile, EL offset caused by external expansion in the printing process is reduced, and a larger parameter adjusting space is achieved in the printing process.

Description

Technical Field

[0001] The utility model belongs to the technical field of screen printing, and specifically relates to a screen plate component and battery printing equipment. Background Art

[0002] The principle of screen printing for solar cells is to use the basic principle that the mesh holes of the graphic part of the screen are permeable to ink, while the mesh holes of the non-graphic part are not permeable to ink. When printing, pour ink on one end of the screen, use a scraper to apply a certain pressure on the ink part of the screen, and move toward the other end of the screen at the same time. The ink is squeezed from the mesh holes of the graphic part to the substrate by the scraper during movement, forming a printed pattern, that is, the battery grid line. The core auxiliary material of screen printing is the screen for printing electrodes. Long-term printing of the screen will cause the tension to decrease, the printed pattern to expand outward, and it will not overlap with the SE laser groove. SE refers to high-concentration doping at the contact part and vicinity of the metal grid line and the silicon wafer, resulting in EL offset. EL refers to electroluminescent defects, which directly affect the yield rate of the cell and the life of the screen, and seriously restrict the control and development of the manufacturing cost of solar cells. Therefore, improving the outward expansion of the screen pattern is very important to improving the life of the screen.

[0003] At present, the improvement of external expansion is mainly to control the total length of the incoming material to be 50μm lower than the SE laser groove, and the total length of the printing after going online is about 20μm lower than the SE laser groove. With long-term printing, the total length of the printed graphics gradually expands to the same as the average of the SE laser groove. The subsequent expansion makes the total length of the printed graphics greater than the total length of the SE laser groove. The adjustment of printing parameters is invalid offline. The total length of the incoming material is controlled. When the incoming material is small, the total length of the printing will be lower than the total length of the SE laser groove when going online. A higher spacing is required. Too high spacing will accelerate the external expansion of the graphics, especially in the middle of the graphics. Too high spacing also increases the risk of explosion and printing abnormalities. After going online, the spacing is controlled. During the increase of the total length of the graphics on the line, the spacing between the screen and the printing table is gradually pressed down to reduce the deformation of the screen and slow down the speed of the external expansion of the graphics. However, after going online, the spacing is gradually pressed down. With the long-term printing tension, the tension gradually decreases. Too low spacing will cause the screen rebound speed in the printing area to be too slow, resulting in abnormal thickening of the printed graphics. Cutting too low spacing will cause poor shaping.

[0004] Therefore, it is urgent to develop a new screen assembly and battery printing equipment to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a screen plate component and battery printing equipment.

[0006] In order to solve the above technical problems, the utility model provides a screen assembly, which includes: a screen body and a mounting unit; wherein a printing area is provided on the screen body, the mounting unit is mounted on the screen body, and the mounting unit is located outside the printing area.

[0007] Specifically, the screen body is installed on the screen frame.

[0008] Specifically, the mounting unit is located on the printing surface of the screen body.

[0009] Specifically, the mounting unit includes: at least two mounting tapes; the two mounting tapes are respectively located on two sides of the printing area.

[0010] Specifically, the distance between the mounting tape and the nearest printed pattern in the printing area is 250 microns to 350 microns.

[0011] Specifically, the length of the mounting tape is the total length of the printed pattern.

[0012] Specifically, the width of the mounting tape is 3 mm to 7 mm, and the thickness of the mounting tape is 50 μm to 70 μm.

[0013] Specifically, the mounting tape is Yinlong tape.

[0014] Specifically, the printed pattern includes: a plurality of grid lines arranged in parallel.

[0015] On the other hand, the utility model provides a battery printing device, which includes: the above-mentioned screen assembly; wherein the screen assembly is installed on a machine platform to print corresponding graphics on a substrate.

[0016] The beneficial effect of the utility model is that the utility model provides protection by arranging mounting units on both sides of the printing area. During the printing process, the mounting units on both sides are stretched so that the tension becomes relatively larger and the deformation is smaller. Since there are high supports from the mounting units on both sides, a smaller spacing can be achieved when setting the plate spacing, thereby further reducing the deformation. The outward expansion of the screen can be reduced to increase the life of the screen, while reducing the EL deviation caused by the outward expansion during the printing process, and there is more room for parameter adjustment during the printing process.

[0017] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by implementing the present invention.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural diagram of the screen assembly of the utility model;

[0021] Figure 2 It is a comparison chart of the PT mean values ​​between setting the mounting unit and not setting the mounting unit;

[0022] Figure 3 This is a comparison chart of the PT values ​​between those with and without placement units set.

[0023] In the figure:

[0024] 1. Screen body; 11. Printing area; 111. Grid line; 2. Mounting unit; 3. Screen frame. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1, in this embodiment, as Figures 1 to 3 As shown, this embodiment provides a screen assembly, which includes: a screen body 1 and a mounting unit 2; wherein a printing area 11 is provided on the screen body 1, and the mounting unit 2 is mounted on the screen body 1, and the mounting unit 2 is located outside the printing area 11.

[0027] In this embodiment, mounting units 2 are provided on both sides of the printing area 11 for protection. During the printing process, the mounting units 2 on both sides are stretched so that the tension becomes relatively larger and the deformation is smaller. Since there are high supports of the mounting units 2 on both sides, a smaller spacing can be achieved when setting the plate spacing, thereby further reducing the deformation. The outward expansion of the screen can be reduced to increase the life of the screen, while reducing the EL deviation caused by the outward expansion during the printing process, and there is more room for parameter adjustment during the printing process.

[0028] In order to be able to install the screen body 1 , the screen body 1 is installed on the screen frame 3 .

[0029] In order to print patterns on the substrate, the mounting unit 2 is located on the printing surface of the screen body 1 .

[0030] As an optional implementation of the mounting unit 2 , the mounting unit 2 includes: at least two mounting tapes; the two mounting tapes are respectively located on two sides of the printing area 11 .

[0031] Specifically, two mounting tapes are provided, and the two mounting tapes are respectively located at two sides of the printing area 11 .

[0032] In order to solve the problem that the two sides of the screen body 1 are subjected to force for a long time, resulting in low tension on both sides, the distance between the mounting tape and the nearest printed pattern in the printing area 11 is 250 microns to 350 microns.

[0033] Specifically, the distance between the mounting tape and the nearest printed pattern in the printing area 11 is 300 micrometers.

[0034] Specifically, the length of the mounting tape is the total length of the printed pattern.

[0035] In order to reduce deformation, the width of the mounting tape is 3 mm to 7 mm, and the thickness of the mounting tape is 50 μm to 70 μm.

[0036] Specifically, the width of the mounting tape is 5 mm, and the thickness of the mounting tape is 60 μm.

[0037] As an optional implementation of the mounting tape, the mounting tape adopts Yinlong tape.

[0038] Specifically, the printed pattern includes: a plurality of grid lines 111 arranged in parallel.

[0039] Two edge grid lines 111 are arranged on the printing surface of the screen version body 1. The distance between one silver dragon tape and the edge grid line 111 is 300 microns, and the distance between the other silver dragon tape and the edge grid line 111 is 300 microns. A 60-micron thick silver dragon tape is pasted along the length direction parallel to the grid line 111. The length of the silver dragon tape is the total length of the printed pattern. The width of the silver dragon tape is 5mm. The distance between the silver dragon tape and the screen version provides tension support during the printing process, which significantly reduces the outward expansion of the screen version. The outward expansion problem is mainly caused by the long-term stress on both sides of the screen version body 1, resulting in low tension on both sides. Therefore, it is considered to paste silver dragon tape on both sides of the printing area 11 for protection. During the printing process, the tension becomes relatively large due to the stretching of the silver dragon tape on both sides, and the deformation is smaller. Because there is high support from the silver dragon tape on both sides, a smaller spacing can be achieved when setting the plate spacing, thereby further reducing the deformation.

[0040] Specifically, the printing surface refers to the side of the screen body 1 that contacts the silicon wafer during the printing process.

[0041] See also Figure 2 , Figure 3 , paste a 60 micron thick silver dragon tape parallel to the grid line 111 at a distance of 300 microns from the edge of the printed grid line 111, and use the same home network version 1 to verify the total length before going online. The total length changes with the life span as shown in the following figure Figure 2 , Figure 3 shown.

[0042] Specifically, PT refers to the total length of the graph.

[0043] Embodiment 2, based on embodiment 1, this embodiment provides a battery printing device, which includes: a screen assembly as provided in embodiment 1; wherein the screen assembly is installed on a machine platform to print corresponding graphics on a substrate.

[0044] In summary, the utility model provides protection by arranging mounting units on both sides of the printing area. During the printing process, the mounting units on both sides are stretched to make the tension relatively larger and the deformation smaller. Since there are high supports from the mounting units on both sides, a smaller spacing can be achieved when setting the plate spacing to further reduce the deformation. The outward expansion of the screen can be reduced to increase the life of the screen, while reducing the EL deviation caused by the outward expansion during the printing process, and there is more room for parameter adjustment during the printing process.

[0045] All devices (parts without specific structure) selected in this application are universal standard parts or parts known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or conventional experimental methods. In addition, the software programs involved in this application are all prior art, and this application does not involve any improvement to the software programs.

[0046] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0049] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0050] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0051] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A screen assembly, characterized in that: include: The grid body and the mounting unit; in The screen body is provided with a printing area, the mounting unit is mounted on the screen body, and the mounting unit is located outside the printing area.

2. The screen assembly according to claim 1, wherein: The screen body is installed on the screen frame.

3. The screen assembly according to claim 1, wherein: The mounting unit is located on the printing surface of the screen body.

4. The screen assembly according to claim 1, wherein: The mounting unit comprises: at least two mounting tapes; The two mounting tapes are respectively located on two sides of the printing area.

5. The screen assembly according to claim 4, characterized in that: The distance between the mounting tape and the nearest printed pattern in the printing area is 250 microns to 350 microns.

6. The screen assembly according to claim 5, characterized in that: The length of the mounting tape is the total length of the printed graphics.

7. The screen assembly according to claim 5, characterized in that: The width of the mounting tape is 3 mm to 7 mm, and the thickness of the mounting tape is 50 μm to 70 μm.

8. The screen assembly according to claim 4, wherein: The mounting tape is Yinlong tape.

9. The screen assembly according to claim 5, characterized in that: The printed pattern includes: a plurality of grid lines arranged in parallel.

10. A battery printing device, characterized in that: include: The screen assembly according to any one of claims 1 to 9; in The screen assembly is installed on the machine platform to print corresponding graphics on the substrate.

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