Solder strip positioning module and series welding machine

Abstract

The utility model discloses a welding strip positioning module and a series welding machine. The welding strip positioning module comprises a module guide fixing block, a welding top strip mounting block and a welding top strip; wherein the module guide fixing block is connected with the welding top strip mounting block in an up-down moving mode, a guide groove allowing the welding top strip to be contained therein is formed in the module guide fixing block in a penetrating mode, the welding top strip is connected to the welding top strip mounting block and can move up and down in the guide groove, and the width of the guide groove is larger than that of the welding top strip; and the welding top strip is used for extruding the welding strip and penetrates through the guide groove. Due to the fact that the welding top strip penetrates through the guide groove, when the welding top strip is used for welding the welding strip, due to the fact that the welding top strip is in a strip shape, no gap is generated, the problem that the welding strip deviates due to tin slag in the guide groove is avoided, and the welding effect of the welding strip is guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the field of solar photovoltaic modules, and more particularly to a solder ribbon positioning module and a string welding machine including such a solder ribbon positioning module. Background Art

[0002] Currently, in the photovoltaic industry, solar cells are welded to solder ribbons through the welding and positioning module of an integrated scribing and welding string welding machine. Among them, the welding and positioning module generally includes a mold base, ejector pins, and a pressure plate. The mold base is provided with grooves and holes for accommodating and guiding the ejector pins. The ejector pins are assembled in the grooves in a suspended manner and protrude through the holes, and are assembled on the mold base through the pressure plate to block the sides of the ejector pins. A guiding groove is provided on the mold base, and the solder ribbon can be accommodated in the guiding groove. By driving the ejector pins to apply a force to the solder ribbon facing the solar cell, the solder ribbon is welded to the solar cell.

[0003] However, during welding, the molten tin will flow into the guiding groove, which easily causes the accumulation of tin slag in the guiding groove. When the solder ribbon moves in the guiding groove, the tin slag easily causes the solder ribbon to shift, affecting the welding effect. Summary of the Utility Model

[0004] To at least partially solve the above technical problems, on the one hand, the present disclosure provides a solder ribbon positioning module, which includes a module guiding and fixing block, a welding ejector bar mounting block, and a welding ejector bar; wherein, the module guiding and fixing block is connected to the welding ejector bar mounting block so as to be movable up and down. A guiding groove for accommodating the welding ejector bar is provided through the module guiding and fixing block. The welding ejector bar is connected to the welding ejector bar mounting block and is movable up and down in the guiding groove, and the width of the guiding groove is greater than the width of the welding ejector bar.

[0005] Wherein, the welding ejector bar is used to extrude the solder ribbon, and the welding ejector bar penetrates through the guiding groove.

[0006] In some embodiments, a plurality of protrusions are provided on the side wall of the guiding groove, and a plurality of grooves are correspondingly provided on the side wall of the welding ejector bar, and the protrusions are respectively accommodated in the grooves.

[0007] In some embodiments, the plurality of protrusions are arranged pairwise and oppositely on the two side walls of the guiding groove. Correspondingly, the plurality of grooves are arranged pairwise and oppositely on the two side walls of the welding ejector bar.

[0008] In some embodiments, the width range of the groove width of the guiding groove corresponding to the place where no protrusion is provided is 1-5 mm, and the groove width of the guiding groove corresponding to the place where protrusions are provided is 0.6-2 mm.

[0009] The width of the welding ejector bar corresponding to the place where no groove is provided is 0.8-4.8 mm, and the width of the welding ejector bar corresponding to the place where grooves are provided is 0.4-1.8 mm.

[0010] In some embodiments, the sizes of the protrusions and the grooves are configured such that the gap width between the side walls of the guiding grooves and the side walls of the welding top bars becomes narrower at the positions where the protrusions and the grooves are provided.

[0011] In some embodiments, a plurality of connecting pins are provided below the module guiding and fixing block, and a plurality of first connecting holes are provided on the welding top bar mounting block, and the connecting pins are slidably inserted into the first connecting holes.

[0012] In some embodiments, the shape of the groove is an arc-shaped groove, and the shape of the protrusion is an arc-shaped protrusion.

[0013] In some embodiments, a polytetrafluoroethylene cloth is provided on the upper surface of the welding top bar for contacting the welding tape.

[0014] In some embodiments, the polytetrafluoroethylene cloth is adhered to the welding top bar, and the end portion of the polytetrafluoroethylene cloth is fixed to the welding top bar through a pressing block and a fastener.

[0015] In some embodiments, the thickness of the polytetrafluoroethylene cloth is in the range of 0.1 - 0.3 mm.

[0016] On the other hand, the present disclosure provides a string welding machine, which includes any one of the foregoing welding tape positioning modules.

[0017] In the welding tape positioning module provided by the present disclosure, the welding top bar is used to replace the ejector pin in the prior art. Since the welding top bar penetrates through the guiding groove, when the welding top bar welds the welding tape, because the welding top bar is in a strip shape, there will be no gap, that is, it is avoided that the molten tin flows into the guiding groove through the gap between the ejector pins during welding, resulting in the accumulation of tin slag, and further avoiding the problem of welding tape deviation caused by the tin slag in the guiding groove, thus ensuring the welding effect of the welding tape.

[0018] In addition, since the design of the welding top bar reduces the accumulation of welding slag, the cleaning frequency of the guiding groove is reduced, and the labor cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 shows a perspective view of a welding tape positioning module provided according to an embodiment of the present disclosure;

[0020] Figure 2 shows an exploded view of a welding tape positioning module provided according to an embodiment of the present disclosure;

[0021] Figure 3 shows Figure 1 another perspective view of the welding tape positioning module, in which the welding top bar is removed;

[0022] Figure 4 shows a schematic plan view of a module guiding and fixing block provided according to an embodiment of the present disclosure;

[0023] Figure 5 Shows a schematic plan view of a welding top bar provided according to an embodiment of the present disclosure. Detailed implementation manners

[0024] The following further describes in detail the solder ribbon positioning module and the string welding machine disclosed by the present utility model in conjunction with the accompanying drawings and specific embodiments. According to the following detailed description and the claims, the advantages and features of the present utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, only for the purpose of conveniently and clearly assisting in explaining the embodiments of the present utility model.

[0025] The present disclosure provides a solder ribbon positioning module, which includes a module guiding and fixing block, a welding top bar mounting block, and a welding top bar. Among them, the module guiding and fixing block is connected to the welding top bar mounting block in a vertically movable manner. A guiding groove for accommodating the welding top bar is provided through the module guiding and fixing block. The welding top bar is connected to the welding top bar mounting block and can move up and down in the guiding groove, and the width of the guiding groove is greater than the width of the welding top bar; wherein, the welding top bar is used to extrude the solder ribbon, and the welding top bar penetrates through the guiding groove.

[0026] For the solder ribbon positioning module provided by the present disclosure, the welding top bar is used to replace the ejector pin in the prior art. Since the welding top bar penetrates through the guiding groove, when the welding top bar welds the solder ribbon, because the welding top bar is in a strip shape, there will be no gap, that is, it is avoided that the molten tin flows into the guiding groove through the gap between the ejector pins during welding, resulting in the accumulation of solder slag, and further avoiding the solder ribbon deviation problem caused by the solder slag in the guiding groove, ensuring the welding effect of the solder ribbon.

[0027] In addition, since the design of the welding top bar reduces the accumulation of welding slag, the cleaning frequency of the guiding groove is reduced, and the labor cost is reduced.

[0028] Refer to Figures 1 to 5 , and describe the solder ribbon positioning module according to the present disclosure.

[0029] The present disclosure provides a solder ribbon positioning module, which includes a module guiding and fixing block 10, a welding top bar mounting block 20, and a welding top bar 30.

[0030] The module guiding and fixing block 10 is connected to the welding top bar mounting block 20 in a vertically movable manner. For example, it is slidably connected. As Figure 2As shown, the module guiding and fixing block 10 includes support structures 13 formed at both ends thereof, and accommodation spaces for accommodating the welding top bar mounting block 20 are defined during the support structures. A plurality of connecting pins 12 are provided below the module guiding and fixing block 10, and a plurality of first connecting holes 22 are provided on the welding top bar mounting block 20. The connecting pins 12 are slidably inserted into the first connecting holes 22. Specifically, the connecting pins 12 are arranged inside the support structures 13 for insertion into the first connecting holes 22 of the welding top bar mounting block 20, so that the welding top bar mounting block 20 and the module guiding and fixing block 10 are slidably connected in the vertical direction (relative to Figure 1 the perspective view shown in), and then drive the welding top bar 30 connected to the welding top bar mounting block 20 to move up and down in the vertical direction.

[0031] A guiding groove 11 for accommodating the welding top bar 30 is penetratively provided in the module guiding and fixing block 10. In the embodiment shown in the drawings, three guiding grooves 11 are provided in the module guiding and fixing block 10. The guiding groove 11 can be made of hard alloy aluminum, with a hard chromium plating on the surface, having the characteristics of high temperature resistance and wear resistance. The length of the guiding groove 11 can be in the range of 40 - 360 mm, for example, it can be 40 mm, 60 mm, 80 mm, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm or 360 mm, etc. The width of the guiding groove 11 is greater than the width of the welding top bar 30 to facilitate the movement of the welding top bar 30 in the guiding groove 11.

[0032] The module guiding and fixing block 10 is further provided with a connecting lug 14 for insertion into the connecting groove 24 of the welding top bar mounting block 20. Steps can also be provided in the connecting lug 14 to function as restricting the relative positions of the module guiding and fixing block 10 and the welding top bar mounting block 20.

[0033] The welding top bar mounting block 20 includes connecting flanges 21 formed at both ends thereof, and the first connecting holes 22 are penetratively provided in the connecting flanges 21. The welding top bar mounting block 20 further includes a second connecting hole 23 formed therein for connecting to the welding top bar 30 via threaded connection, pin hole connection, etc.

[0034] The welding top bar 30 is connected to the welding top bar mounting block 20. The welding top bar 30 is provided with threaded holes, or the second connecting hole 23 is formed as a threaded hole, so that the welding top bar 30 can be fixedly connected to the welding top bar mounting block 20 using screws. Alternatively, a plurality of (for example, 2 - 9) positioning pins inserted into the second connecting hole 23 can be provided in the welding top bar 30 to achieve the installation and quick replacement of the welding top bar 30.

[0035] Alternatively, the welding top bar 30 can include a top bar main body 31 and a base portion 32. The shape of the top bar main body 31 is configured to allow its vertical movement in the guiding groove 11.

[0036] By adopting the welding top bar 30 to replace the ejector pin in the prior art, since the welding top bar is strip-shaped, there will be no gap, that is, it is avoided that the molten tin flows into the guiding groove through the gap between the ejector pins during welding, resulting in the accumulation of solder dross, and further avoiding the problem of solder strip deviation caused by the solder dross in the guiding groove.

[0037] The solder strip positioning module according to the present disclosure integrates the module cover plate and the module cover plate mounting block in the prior art into a module guiding and fixing block 10, which has the advantages of simple design, easy disassembly and low cost.

[0038] In some embodiments, alternatively, a plurality of protrusions 101 are provided in the side wall of the guiding groove 11, and a plurality of grooves 301 are correspondingly provided in the side wall 30a of the welding top bar 30. The protrusions 101 are respectively received in the grooves 301 to facilitate the vertical movement of the welding top bar 30 in the guiding groove 11 during welding. Moreover, the plurality of protrusions 101 divide the guiding groove 11 into different widths, and the solder dross in different sections of the guiding groove 11 will not stack together, which can also prevent the solder strip on the upper surface 33 of the welding top bar 30 from deviating.

[0039] As Figure 4 Best shown, the plurality of protrusions 101 are arranged pairwise and oppositely in the side walls on both sides of the guiding groove 11. Correspondingly, the plurality of grooves 301 are arranged pairwise and oppositely in the side walls 30a on both sides of the welding top bar 30. The relative and symmetrical arrangement of the protrusions 101 and the grooves 301 is beneficial to the stability and orientation of the welding top bar 30 in the guiding groove 11 and is beneficial to preventing the solder strip from deviating.

[0040] Preferably, the sizes of the protrusions 101 and the grooves 301 are configured such that the gap width between the side wall of the guiding groove 11 and the side wall 30a of the welding top bar 30 becomes narrower at the positions where the protrusions 101 and the grooves 301 are provided (compared with other positions where the protrusions 101 and the grooves 301 are not provided), so as to further facilitate the stability and orientation of the welding top bar 30 in the guiding groove 11 and is beneficial to preventing the solder strip from deviating.

[0041] In some embodiments, the groove width of the guiding groove 11 corresponding to the position where the protrusion 101 is not provided ranges from 1 to 5 mm, for example, it can be 1 mm, 2 mm, 3 mm, 4 mm or 5 mm, etc. The groove width of the guiding groove 11 corresponding to the position where the protrusion 101 is provided is 0.6 - 2 mm, for example, it can be 0.6 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm or 2 mm, etc. The width of the welding top bar 30 corresponding to the position where the groove 301 is not provided is 0.8 - 4.8 mm, for example, it can be 0.8 mm, 1.8 mm, 2.8 mm, 3.8 mm or 4.8 mm, etc. The width of the welding top bar 30 corresponding to the position where the groove 301 is provided is 0.4 - 1.8 mm, for example, it can be 0.4 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm or 1.8 mm, etc. The width of the guiding groove in the prior art is 0.7 mm. In the embodiments of the present disclosure, the width range of the guiding groove where the protrusion is not provided is 1 - 5 mm. Compared with the width of the guiding groove in the prior art being 0.7 mm, the guiding groove 11 is widened, which is beneficial to increasing the storage of solder dross, reducing the accumulation of solder dross, reducing the problem of frequent cleaning, extending the solder dross cleaning cycle, and preventing the solder dross from blocking and causing the solder strip to shift when the solder strip is stretched.

[0042] As an example, the local width of the guiding groove 11 at the position where the protrusion 101 is provided is 0.8 mm, and the local width of the welding top bar 30 at the position where the groove 301 is provided is 0.6 mm. In this case, the gap width between the side wall of the guiding groove 11 and the side wall 30a of the welding top bar 30 is 0.2 mm.

[0043] Particularly, in a preferred embodiment, the width of the guiding groove 11 is 3.5 mm, and the width of the welding top bar 30 is 3.0 mm. In this case, the gap width between the side wall of the guiding groove 11 and the side wall 30a of the welding top bar 30 is 0.5 mm. As used herein, the gap width between the side wall of the guiding groove 11 and the side wall 30a of the welding top bar 30 refers to the sum of the gap width between one side wall 30a of the welding top bar 30 and the opposite side wall of the guiding groove 11 and the gap width between the other side wall 30a of the welding top bar 30 and the opposite side wall of the guiding groove 11. Therefore, the gap width between the side wall of the guiding groove 11 and the side wall 30a of the welding top bar 30 can be obtained by subtracting the distance (i.e., width) between the two side walls 30a of the welding top bar 30 from the distance between the two side walls of the guiding groove 11.

[0044] As used herein, the local width of the guiding groove 11 at the position where the protrusion 101 is provided is measured as the minimum width of the guiding groove 11 at the position where the protrusion 101 is provided. It should be understood that the width of the guiding groove 11 is measured as the width of the guiding groove 11 at the position where the protrusion 101 is not provided. The width of the guiding groove 11 at the position where the protrusion 101 is not provided is preferably consistent.

[0045] Similarly, the local width of the welding top strip 30 at the position where the groove 301 is provided is measured as the minimum width of the welding top strip 30 at the position where the groove 301 is provided. It should be understood that the width of the welding top strip 30 is measured as the width of the welding top strip 30 at the position where the groove 301 is not provided. The width of the welding top strip 30 at the position where the groove 301 is not provided is preferably consistent.

[0046] Preferably, the sizes of the protrusion 101 and the groove 301 are configured such that the clearance width between the side wall of the guiding groove 11 and the side wall 30a of the welding top strip 30 is consistent at the position where the protrusion 101 and the groove 301 are provided.

[0047] In particular, in an exemplary embodiment, the shape of the groove 301 is an arc-shaped groove, and the shape of the protrusion 101 is an arc-shaped protrusion. The groove 301 and the protrusion 101 can each be arranged to be evenly spaced from each other. The groove 301 can have a radius of 1.45 mm, and the protrusion 101 can have a radius of 1.35 mm. When the welding top strip 30 is accurately centered in the guiding groove 11, that is, when the longitudinal symmetry axis of the welding top strip 30 coincides with the longitudinal symmetry axis of the guiding groove 11, the profiles of the groove 301 and the protrusion 101 form concentric circles. Therefore, the 0.1 mm radius difference forms a consistent 0.2 mm clearance width at the position of the groove 301 - protrusion 101.

[0048] In some embodiments, the upper surface 33 of the welding top strip 30 for contacting the welding tape is provided with a polytetrafluoroethylene cloth (not shown). The thickness of the polytetrafluoroethylene cloth is in the range of 0.1 - 0.3 mm, such as 0.1 mm, 0.2 mm or 0.3 mm, etc. The polytetrafluoroethylene cloth can be pasted on the upper surface 33 of the welding top strip 30. And / or, the ends of the polytetrafluoroethylene cloth are fixed to the welding top strip 30 through pressing blocks and fasteners, and are pressed against the upper surface 33 through the pressing blocks arranged at both ends of the welding top strip 30 or both ends of its upper surface 33, and the pressing blocks can be fastened to the welding top strip 30 through screws. The polytetrafluoroethylene cloth can make the temperature reduction effect of the polytetrafluoroethylene cloth better during back blowing cooling, accelerate the solidification of the solder balls, and also has the characteristics of anti-sticking tin and anti-wear. In addition, the polytetrafluoroethylene cloth material is softer, so that the welding tape is closely attached to the battery cell and is not easily fractured, avoiding the risk of cracking.

[0049] On the other hand, the present disclosure provides a string welding machine, which includes any one of the foregoing solder tape positioning modules. Other parts of the structure of the string welding machine belong to the prior art, and will not be described in detail in the embodiments of the present disclosure.

[0050] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 thus should not be construed as a limitation of the present invention.

[0051] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0052] As used in the present disclosure and the appended claims, the singular forms "a", "the", and "said" are also intended to include the plural forms, unless the context clearly dictates otherwise. It should also be understood that the term " / and / " as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0053] Obviously, those skilled in the art can make various changes and modifications to the solder tape positioning module and the string welding machine disclosed in the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A solder tape positioning module, characterized in that, It includes a module guiding fixed block (10), a welding top bar mounting block (20) and a welding top bar (30); Among them, the module guiding fixed block (10) is connected to the welding top bar mounting block (20) in a vertically movable manner. A guiding groove (11) for accommodating the welding top bar (30) is provided through the module guiding fixed block (10). The welding top bar (30) is connected to the welding top bar mounting block (20) and can move up and down in the guiding groove (11), and the width of the guiding groove (11) is greater than the width of the welding top bar (30); Among them, the welding top bar (30) is used to extrude the welding tape, and the welding top bar (30) penetrates through the guiding groove (11).

2. The solder tape positioning module according to claim 1, wherein, A plurality of protrusions (101) are provided in the side wall of the guiding groove (11), and a plurality of grooves (301) are correspondingly provided in the side wall of the welding top bar (30), and the protrusions (101) are respectively received in the grooves (301).

3. The solder ribbon positioning module according to claim 2, characterized in that, A plurality of the protrusions (101) are arranged pairwise and oppositely on the two side walls of the guiding groove (11). Correspondingly, a plurality of the grooves (301) are arranged pairwise and oppositely on the two side walls of the welding top bar (30).

4. The solder ribbon positioning module according to claim 2, characterized in that, The groove width range of the guiding groove (11) corresponding to the position where the protrusions are not provided on the guiding groove (11) is 1-5 mm, and the groove width of the guiding groove (11) corresponding to the position where the protrusions are provided on the guiding groove (11) is 0.6-2 mm; The width of the welding top bar (30) corresponding to the position where the groove (301) is not provided on the welding top bar (30) is 0.8-4.8 mm, and the width of the welding top bar (30) corresponding to the position where the groove (301) is provided on the welding top bar (30) is 0.4-1.8 mm.

5. The solder tape positioning module according to claim 2, wherein, The sizes of the protrusions (101) and the grooves (301) are configured such that the gap width between the side wall of the guiding groove (11) and the side wall of the welding top bar (30) becomes narrower at the positions where the protrusions (101) and the grooves (301) are provided.

6. The solder tape positioning module according to claim 5, characterized in that A plurality of connecting pins (12) are provided below the module guiding fixed block (10), and a plurality of first connecting holes (22) are provided on the welding top bar mounting block (20), and the connecting pins (12) are slidably inserted into the first connecting holes (22).

7. The solder tape positioning module according to claim 3, wherein, The shape of the groove (301) is an arc-shaped groove, and the shape of the protrusion (101) is an arc-shaped protrusion.

8. The solder tape positioning module according to claim 1, wherein, A tetrafluoro cloth is provided on the upper surface (31) of the welding top bar (30) for contacting the welding tape.

9. The solder tape positioning module according to claim 8, wherein, The tetrafluoro cloth is pasted on the welding top bar (30); and / or, the end of the tetrafluoro cloth is fixed to the welding top bar (30) by a pressing block and fasteners; and / or The thickness of the tetrafluoro cloth is in the range of 0.1-0.3 mm.

10. A string welding machine, characterized in that, It includes a welding tape positioning module according to any one of the preceding claims 1-9.

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