Auxiliary tooling for printing and printing screen assembly

Abstract

This application relates to an adhesive printing auxiliary fixture and a printing screen assembly. The adhesive printing auxiliary fixture includes multiple adhesive guide tubes and connectors. One end of each adhesive guide tube has an adhesive inlet, and the other end has an adhesive outlet. The multiple adhesive guide tubes are inserted one-to-one into multiple perforated holes of the screen. The connectors connect the periphery of the adhesive inlets of the multiple adhesive guide tubes and form a supporting surface for abutting against the screen. The adhesive outlets of the multiple adhesive guide tubes are all located on the same side of the supporting surface. With this adhesive printing auxiliary fixture and printing screen assembly, when the adhesive guide tubes are clogged with adhesive, only a new adhesive printing auxiliary fixture or a cleaned adhesive printing auxiliary fixture needs to be replaced, and the printing screen assembly can continue to be used. Therefore, the adhesive printing auxiliary fixture of this application can reduce the hassle of cleaning the perforated holes of the screen, and as the adhesive printing auxiliary fixture is removed from the screen, adhesive residue is less likely to remain on the screen. This structural design helps maintain the cleanliness of the screen.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module production equipment technology, and in particular to a printing adhesive auxiliary tooling and printing screen assembly. Background Technology

[0002] Before welding the solder ribbon to the solar cell, the printing screen of the stringing equipment needs to apply adhesive, usually thermosetting adhesive, to the points on the cell where it will connect to the solder ribbon. With prolonged use, the thermosetting adhesive remaining in the perforations of the printing screen can harden, affecting the subsequent printing of adhesive onto the solar cell. Adhesive height and weight are key control factors for subsequent dicing and soldering of photovoltaic modules. Improper control of adhesive height and weight can significantly impact series reversal, cascading reversal, and module yield. Poor adhesive height and weight can also lead to incomplete soldering and cell cracking. Currently, incomplete soldering at adhesive points requires cell replacement, resulting in severe cell loss. Furthermore, during the lamination process between the solar cell and solder ribbon, inconsistent adhesive height can easily cause microcracks in the solar cell, leading to module degradation or scrap. Therefore, regular cleaning of the printing screen is necessary.

[0003] Printing screens often have a large number of perforations; for example, some printing screens have as many as 300 perforations. In related technologies, brushes or single raised fixtures are typically used to clean the printing screens, but this operation is time-consuming, labor-intensive, and the cleaning effect is not ideal. Utility Model Content

[0004] Therefore, it is necessary to provide an adhesive auxiliary tooling and a printing screen assembly to address the problems of time-consuming and labor-intensive cleaning of printing screens and poor cleaning results.

[0005] On the one hand, this application provides a printing adhesive auxiliary tooling, including:

[0006] Multiple glue guide tubes, each with a glue inlet at one end and a glue outlet at the other end, are used to be inserted into multiple perforated holes in the screen printing plate in a one-to-one correspondence.

[0007] A connector is provided that connects the periphery of the glue inlet of a plurality of glue guide cylinders, and the connector forms a supporting surface for abutting against the screen, wherein the glue outlet of the plurality of glue guide cylinders is located on the same side of the supporting surface.

[0008] In some embodiments, the plurality of adhesive guide tubes are arranged in a rectangular array.

[0009] In some embodiments, the number of rows of the plurality of adhesive guide tubes is 10 to 20, and the number of columns of the plurality of adhesive guide tubes is 15 to 22.

[0010] In some embodiments, the connector includes multiple connecting wires, and any adjacent guide tubes are connected by at least one of the connecting wires.

[0011] In some embodiments, the multiple connecting wires are arranged in a warp and weft braid.

[0012] In some embodiments, the connecting wire is made of metal.

[0013] In some embodiments, the adhesive guide tube is a hollow cylindrical tube.

[0014] In some embodiments, a limiting ring is provided on the periphery of the glue guide tube corresponding to the glue inlet. The limiting ring is used to lock and limit the glue guide tube within the cutout hole of the screen.

[0015] On the other hand, this application provides a printing screen assembly, including a screen and the aforementioned printing adhesive auxiliary fixture. The screen is provided with a plurality of perforated holes, each of which penetrates the screen along its thickness direction. The printing adhesive auxiliary fixture is detachably coupled to the screen, and a plurality of adhesive guide tubes of the printing adhesive auxiliary fixture are inserted into the plurality of perforated holes in a corresponding manner. The length of the adhesive guide tube is less than or equal to the thickness of the screen.

[0016] The wall of the perforated hole and / or the inner wall of the adhesive guide tube are provided with laser positioning elements. The laser positioning elements are capable of emitting at least two intersecting laser beams, and the intersection point is located on the center line of the adhesive guide tube.

[0017] The aforementioned printing auxiliary fixture and printing screen assembly, when printing adhesive onto solar cells, allows multiple adhesive guide tubes of the printing auxiliary fixture to be inserted one-to-one into multiple perforated holes on the screen. Since one end of each guide tube has an inlet and the other end has an outlet, adhesive can be applied to the desired locations on the solar cell. If the guide tube becomes clogged with adhesive, simply remove the printing auxiliary fixture from the screen and replace it with a new or cleaned one; the printing screen assembly can then continue to be used. Therefore, using the printing auxiliary fixture of this application reduces the hassle of cleaning the screen, and as the fixture is removed, adhesive residue is less likely to remain on the screen, thus this structural design helps maintain screen cleanliness. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an exploded view of a printing screen assembly according to an embodiment of this application.

[0020] Figure 2 for Figure 1 Another perspective schematic diagram of the exploded structure of the printing screen assembly.

[0021] Figure 3 for Figure 1 The diagram shows the combined structure of the printing screen assembly.

[0022] Figure 4 for Figure 3 A magnified partial structural diagram of the combined structure of the printing screen assembly is shown.

[0023] Explanation of icon numbers:

[0024] 100. Printing screen assembly; 10. Screen; 11. Hole; 20. Adhesive printing auxiliary tooling; 21. Adhesive guide tube; 211. Adhesive inlet; 212. Adhesive outlet; 213. Limiting ring; 22. Connector; 221. Supporting surface; 222. Connecting wire. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0031] See Figure 1 and Figure 2 , Figure 1 An exploded view of a printing screen assembly according to an embodiment of this application is shown. Figure 2 This illustration shows another perspective view of the exploded structure of a printing screen assembly according to an embodiment of this application. The printing screen assembly 100 provided in this application includes a screen 10 and a printing auxiliary fixture 20. The screen 10 is provided with a plurality of perforations 11, each perforation 11 penetrating the screen 10 along its thickness direction. The printing auxiliary fixture 20 is detachably coupled to the screen 10 to assist the screen 10 in printing adhesive onto the battery cells.

[0032] The printing auxiliary fixture 20 includes multiple glue guide tubes 21 and a connector 22. One end of each glue guide tube 21 has a glue inlet 211, and the other end has a glue outlet 212. The connector 22 connects to the periphery of the glue inlets 211 of the multiple glue guide tubes 21, and the connector 22 forms a supporting surface 221 for abutting against the screen 10. The glue outlets 212 of the multiple glue guide tubes 21 are all located on the same side of the supporting surface 221.

[0033] When printing adhesive onto the battery cell using the aforementioned printing screen assembly 100, an adhesive printing auxiliary fixture 20 can be placed over the screen 10, so that the multiple adhesive guide tubes 21 of the adhesive printing auxiliary fixture 20 are inserted one-to-one into the multiple cutout holes 11. In this way, the printing screen assembly 100 covers the side of the battery cell that needs to be printed with adhesive, and the adhesive guide tubes 21 can be used to apply adhesive to the areas on the battery cell that need to be applied.

[0034] Since the printing auxiliary fixture 20 is detachably fitted with the screen 10, when the adhesive guide cylinder 21 is clogged with adhesive, it is only necessary to remove the printing auxiliary fixture 20 from the screen 10 and replace it with a new printing auxiliary fixture 20 or a cleaned printing auxiliary fixture 20, and the printing screen assembly 100 can continue to be used. Therefore, using the printing auxiliary fixture 20 of this application can reduce the trouble of cleaning the stencil holes 11 of the screen 10, and as the printing auxiliary fixture 20 is removed from the screen 10, adhesive is less likely to remain in the stencil holes 11 of the screen 10, thus this structural arrangement helps to maintain the cleanliness of the screen 10.

[0035] It should be noted that in some embodiments, the printing auxiliary tooling 20 can be used as a disposable consumable. For example, if the adhesive in the adhesive guide tube 21 solidifies during the use of the printing auxiliary tooling 20 in conjunction with the screen 10, affecting the subsequent printing effect, the printing auxiliary tooling 20 can be removed from the screen 10 and disposed of as scrap, and no longer used.

[0036] In some implementations, the printing auxiliary tooling 20 can also be a reusable consumable. For example, multiple printing auxiliary tooling 20s can be prepared during operation. After the printing auxiliary tooling 20 has been used with the screen 10 for a period of time, it can be replaced to obtain a good printing effect. The printing auxiliary tooling 20 removed from the screen 10 can be cleaned and reused in printing operations. In this way, multiple printing auxiliary tooling 20s can be rotated for use with the screen 10, and the cleaning operation of the printing auxiliary tooling 20 removed from the screen 10 will not prevent other printing auxiliary tooling 20s from continuing to be used with the screen 10, so as to maintain production efficiency.

[0037] In some embodiments, the wall of the perforated hole 11 and / or the inner wall of the adhesive guide tube 21 are provided with laser positioning elements (not shown). The laser positioning elements are capable of emitting at least two intersecting laser beams, with the intersection point located on the center line of the adhesive guide tube 21.

[0038] During the dispensing process, the adhesive material adheres along the guide tube 21 to the corresponding position on the battery cell, i.e., the dispensing position. Therefore, in this embodiment, the intersection of the lasers emitted by the laser positioning element is located on the center line of the guide tube 21. This allows for easy alignment of the intersection with the position on the battery cell where dispensing is required, which helps control the accuracy of the dispensing position and the shape of the dispensing. This further improves the printing quality, makes the glue height and weight more controllable, and reduces the probability of phenomena such as poor soldering and cell cracking caused by poor glue height and weight.

[0039] It should be noted that the laser positioning element may include an optical fiber or a semiconductor laser chip. This is as long as the laser positioning element can emit at least two laser beams that intersect at the center line of the guide tube 21.

[0040] In some embodiments, multiple adhesive guide tubes 21 are arranged in a rectangular array. When the adhesive material is guided to adhere to the battery cell by the multiple adhesive guide tubes 21, adhesive portions arranged in a rectangular array will be formed on the battery cell at corresponding positions so as to connect the solder ribbon using the adhesive portions.

[0041] In some embodiments, the number of rows of the multiple adhesive guide tubes 21 is 10 to 20, and the number of columns of the multiple adhesive guide tubes 21 is 15 to 22. In this way, the adhesive printing auxiliary tooling 20, together with the corresponding screen 10, can apply adhesive at corresponding positions on the battery cell to form adhesive portions with the corresponding number of rows and columns, thereby facilitating the connection of the battery cell to the solder ribbon using the adhesive portions.

[0042] It should be noted that the number of rows and columns of the multiple adhesive guide tubes 21 can be set according to the arrangement of the adhesive dispensing positions on the solar cell. As long as there is an adhesive guide tube 21 corresponding to the position on the solar cell where adhesive needs to be dispensed when using the printing screen assembly 100 to print adhesive onto the solar cell, the arrangement can be as follows: For example, the number of rows of the multiple adhesive guide tubes 21 can be 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20; the number of columns can be 15, 16, 17, 18, 19, 20, 21, or 22.

[0043] For a structure in which multiple adhesive guide tubes 21 are arranged in a rectangular array, the row spacing between adhesive guide tubes 21 can be less than or equal to 5 mm, and the column spacing between adhesive guide tubes 21 can be less than or equal to 15 mm. This ensures that after the adhesive is applied to the solar cell using the printing auxiliary tooling 20 in conjunction with the screen 10, the distance between the adhesive portions on the solar cell is not too large, which would affect the stability of the connection with the solder ribbon.

[0044] In some embodiments, the printing screen assembly 100 includes a plurality of printing auxiliary fixtures 20. Multiple printing auxiliary fixtures 20 can be laid on the screen 10 such that the number of adhesive guide tubes 21 of the multiple printing auxiliary fixtures 20 matches the number of cutout holes 11 on the screen 10, and their positions correspond one-to-one. In this way, the multiple printing auxiliary fixtures 20 work together with the screen 10 to perform printing, dispensing adhesive at the corresponding dispensing positions on the battery cells.

[0045] In this embodiment, since the printing screen assembly 100 includes multiple printing auxiliary fixtures 20, when some of the printing guide cylinders 21 cause printing defects due to the curing of the adhesive, the problematic printing auxiliary fixture 20 can be replaced individually, avoiding the scrapping of the entire screen and reducing maintenance costs. For example, if some of the printing auxiliary fixtures 20 have poor printing effects in a certain area due to the presence of cured adhesive in the printing guide cylinders 21, only these printing auxiliary fixtures 20 that cause poor printing effects need to be replaced, without replacing the printing auxiliary fixtures 20 that have normal printing effects.

[0046] Combined again Figure 1 and Figure 2 As shown, in some embodiments, the connector 22 includes multiple connecting wires 222, and any adjacent guide tubes 21 are connected by at least one connecting wire 222.

[0047] In this embodiment, the connecting wire 222 is easily cut to a suitable length. Therefore, the glue-guiding cylinders 21 are connected by the connecting wire 222, and the connecting wire 222 of a suitable length can be easily cut according to the spacing between the glue-guiding cylinders 21 to connect adjacent glue-guiding cylinders 21. In addition, as a filamentous structure, the connecting wire 222 is easy to wind around the periphery of the glue-guiding cylinder 21, thereby making the connection between the connecting wire 222 and the glue-guiding cylinder 21 simple and reliable.

[0048] In some embodiments, the multiple connecting wires 222 are arranged in a warp and weft braid. In this way, the multiple connecting wires 222 interweave to form a grid-like support structure, which enables the adhesive guide tube array 21 to resist lateral shear force during the printing process, prevents displacement and ensures the consistency of the flow path of the adhesive material from the adhesive inlet 211 to the adhesive outlet 212. This helps to reduce the diameter fluctuation of the adhesive portion formed on the battery cell during the dispensing process, thereby reducing the probability of cold solder joints.

[0049] In some embodiments, the connecting wire 222 is made of metal. The metal connecting wire 222 not only provides good support but also good elasticity. Good support facilitates the application of the printing adhesive auxiliary fixture 20 to the screen 10. Good elasticity helps to suppress localized stress concentration, thus reducing the likelihood of the connecting wire 222 breaking.

[0050] The material of the connecting wire 222 includes, but is not limited to, stainless steel or nickel-titanium alloy.

[0051] In some embodiments, the adhesive guide tube 21 is a hollow cylindrical tube, so that the adhesive portion formed on the battery cell by the adhesive guide tube 21 is circular, thereby improving the connection stability between the battery cell and the solder ribbon.

[0052] Combination Figure 3 and Figure 4 As shown, in some embodiments, a limiting ring 213 is provided on the periphery of the glue guide tube 21 corresponding to the glue inlet 211. The limiting ring 213 is used to engage and limit the screen printing plate 10, thereby confining the glue guide tube 21 within the cutout hole 11 of the screen printing plate 10. In this embodiment, by using the limiting ring 213 to engage and limit the screen printing plate 10, the glue guide tube 21 is prevented from detaching from the screen printing plate 10, thereby improving the stability of the fit between the printing auxiliary tooling 20 and the screen printing plate 10, which is beneficial to improving the combined effect of the two.

[0053] The limiting ring 213 can form an interference fit with the cutout hole 11 of the screen printing plate 10. For example, the tolerance of the interference fit between the limiting ring 213 and the cutout hole 11 of the screen printing plate 10 is ±0.1mm.

[0054] The dimensions of the adhesive guide tube 21 can be set according to specific dispensing needs. For example, in some embodiments, the inner circumferential diameter of the adhesive guide tube 21 is 2mm to 5mm, specifically 2mm, 3mm, 4mm or 5mm.

[0055] In some embodiments, the length of the adhesive guide tube 21 is less than or equal to the thickness of the screen 10, so that the adhesive outlet 212 of the adhesive guide tube 21 does not protrude from the surface of the screen 10, in order to maintain the tightness of the adhesion between the screen 10 and the battery cell and reduce the flow of adhesive into the gap between them, thus preventing adhesive overflow.

[0056] It should be noted that when the length of the adhesive guide tube 21 is equal to the thickness of the screen 10, after the adhesive guide tube 21 is inserted into the perforated hole 11, the end face where the adhesive outlet 212 is located is flush with the surface of the screen 10 facing away from the adhesive inlet 211. This not only maintains the tightness of the fit between the screen 10 and the battery cell, but also ensures that the adhesive outlet 212 of the adhesive guide tube 21 is close to the battery cell. Without considering processing errors, the adhesive outlet 212 abuts against the battery cell, which facilitates the adhesion of adhesive along the adhesive guide tube 21 to the battery cell and reduces the probability of adhesive adhering to the screen 10.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0058] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A printing adhesive auxiliary tooling (20), characterized in that, include: Multiple glue guide tubes (21), one end of which is provided with a glue inlet (211) and the other end is provided with a glue outlet (212). The multiple glue guide tubes (21) are used to be inserted into the multiple hollow holes (11) of the screen (10) in a one-to-one correspondence. The connector (22) connects to the periphery of the glue inlet (211) of the plurality of glue guide cylinders (21), and the connector (22) forms a bearing surface (221) for abutting against the screen (10). The glue outlet (212) of the plurality of glue guide cylinders (21) are all located on the same side of the bearing surface (221).

2. The glue stamping assisting tool (20) according to claim 1, characterized in that, Multiple adhesive guide tubes (21) are arranged in a rectangular array.

3. The glue stamping assisting tool (20) according to claim 2, characterized in that, The number of rows of the plurality of adhesive guide tubes (21) is 10 to 20, and the number of columns of the plurality of adhesive guide tubes (21) is 15 to 22.

4. The glue stamping assistive tool (20) of claim 1, wherein, The connector (22) includes multiple connecting wires (222), and any adjacent guide tubes (21) are connected by at least one of the connecting wires (222).

5. The glue stamping aid tool (20) according to claim 4, characterized in that The multiple connecting wires (222) are arranged in a warp and weft braid.

6. The glue stamping aid tool (20) according to claim 4 or 5, characterized in that The connecting wire (222) is made of metal.

7. The glue stamping assistive tool (20) of claim 1, wherein, The adhesive guide tube (21) is a hollow cylindrical tube.

8. The glue stamping assistive tool (20) of claim 1, wherein, A limiting ring (213) is provided on the periphery of the glue guide tube (21) corresponding to the glue inlet (211). The limiting ring (213) is used to lock and limit the glue guide tube (21) to the screen (10) so as to limit the glue guide tube (21) to the hollow hole (11) of the screen (10).

9. A printing screen assembly (100) characterized by The device includes a screen (10) and an adhesive printing auxiliary fixture (20) as described in any one of claims 1-8. The screen (10) is provided with a plurality of hollow holes (11), each of the hollow holes (11) penetrating the screen (10) along the thickness direction of the screen (10). The adhesive printing auxiliary fixture (20) is detachably coupled to the screen (10), and a plurality of adhesive guide tubes (21) of the adhesive printing auxiliary fixture (20) are inserted into the plurality of hollow holes (11) in a corresponding manner. The length of the adhesive guide tube (21) is less than or equal to the thickness of the screen (10).

10. The printing screen assembly (100) according to claim 9, characterized in that The wall of the hollow hole (11) and / or the inner wall of the adhesive guide tube (21) are provided with laser positioning elements. The laser positioning elements are capable of emitting at least two intersecting laser beams, and the intersection point is located on the center line of the adhesive guide tube (21).

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