Photovoltaic cell universal series welding hold-down clamp based on different sizes

Abstract

The utility model discloses a photovoltaic cell universal series welding hold-down clamp based on different sizes, which relates to the technical field of photovoltaic cell processing equipment and comprises a hold-down clamp body, and at least one side of the hold-down clamp body along the direction of a welding strip is detachably connected with an additional component. The pressing tool body comprises a plurality of needle pressing strips arranged at equal intervals in the longitudinal direction and pressing plates fixedly connected to the two ends of the needle pressing strips, pressing discs with the same number are connected to the needle pressing strips at equal intervals in the transverse direction, and the pressing discs are located on the same axis in the transverse / longitudinal direction; the additionally-installed component comprises at least one additionally-installed needle pressing strip, and pressing discs are connected to the additionally-installed needle pressing strip at equal intervals in the length direction, wherein the number and the position of the pressing discs correspond to those of the needle pressing strip. The series welding hold-down clamp can be suitable for photovoltaic cells of most specifications and models in the market, so that the production cost can be greatly reduced, and the loss can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic cell processing equipment, and in particular relates to a universal string welding press based on photovoltaic cells of different sizes. Background Art

[0002] String welding is an important part of the photovoltaic module production process. It involves connecting multiple photovoltaic cells in series through tin-coated copper strips (commonly known as welding strips) to form a complete circuit. This connection method is one of the key steps for photovoltaic modules to convert solar energy into electrical energy. In the process of series welding of cells, the string welding press can fix the relative position of the welding strip and the cell, helping the welding machine to complete the welding function. Therefore, the string welding press is essential for the welding process.

[0003] The existing string welding presses are all customized according to the specifications of the battery cells, and cannot meet the welding requirements of battery cells of different specifications. With the continuous update and iteration of global photovoltaic products, many production equipment, tooling, including string welding presses will face elimination, which will be a huge waste.

[0004] In view of this, there is an urgent need for a universal string welding press based on photovoltaic cells of different sizes to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a universal string welding press based on photovoltaic cells of different sizes, or to reuse the existing string welding press, and by designing and adding components, expand the pressure range applied to the welding strip during the string welding process, so that it can be compatible with the string welding process of different photovoltaic cells, thereby solving the technical problem that the string welding press in the prior art cannot adapt to new products.

[0006] To achieve the above purpose, the utility model provides the following solution: a universal string welding press for photovoltaic cells of different sizes, comprising:

[0007] A pressing tool body, wherein at least one side of the pressing tool body along the direction of the welding strip is detachably connected with an additional component;

[0008] The press body comprises a plurality of pressing pin strips arranged at equal intervals in the longitudinal direction and pressing plates fixedly connected to both ends of the pressing pin strips, each of the pressing pin strips is connected to a same number of pressing plates at equal intervals in the transverse direction, and each of the pressing plates is on the same axis in the transverse / longitudinal direction;

[0009] The mounting component comprises at least one mounting pressure needle strip, and the mounting pressure needle strip is connected with pressure plates corresponding in number and position to the pressure needle strip at equal intervals along the length direction.

[0010] Preferably, the side of the press body connected to the mounting component is also detachably connected to anti-collision blocks located at both ends of the mounting component, and the longitudinal width and thickness of the anti-collision blocks are both greater than the mounting component.

[0011] Preferably, the two anti-collision blocks are fixedly connected to both ends of the mounting component.

[0012] Preferably, the additional component is made of aluminum alloy, and the anti-collision block is made of a metal material having a higher strength than that of the additional component.

[0013] Preferably, the mounting component is connected to the outer side surface of the pressure needle strip through a hexagon socket bolt; and the anti-collision block is connected to the outer side surface of the pressure plate through a hexagon socket bolt.

[0014] Preferably, the pressure plate is elastically connected to the pressure needle strip / the additional pressure needle strip.

[0015] Preferably, the additional pressure needle strip is connected to a side facing the press body with a plurality of limit blocks. When the additional component is installed on the side of the press body, the distance between the additional pressure needle strip and the press body can be adjusted by adjusting the length of the limit blocks.

[0016] Preferably, the press body further comprises a plurality of longitudinal connecting ribs vertically penetrating through and connecting the pressing needle strips.

[0017] Preferably, both ends of the longitudinal connecting rib are provided with end face screw holes of the press for installing the additional component, and the additional component is provided with bolt countersunk holes passing through the additional pressure needle strip and the limit block, and the bolt countersunk holes correspond to the positions of the end face screw holes of the press.

[0018] The utility model discloses the following technical effects:

[0019] The utility model proposes a universal string welding press based on photovoltaic cells of different sizes, including an additional component, which can also be modified on the basis of an existing string welding press to add the additional component, so that the string welding press breaks through the inherent size limitation, and expands its functional structure area and the range of pressure applied to the welding strip during the string welding process, so that it can be compatible with the string welding processes of different photovoltaic cells. The utility model string welding press creates a new set of full-size photovoltaic cell string welding press application solutions, which can be applicable to most specifications and models of photovoltaic cells on the market, thereby greatly reducing production costs and reducing losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0022] Figure 2 It is a side view of embodiment 1 of the utility model;

[0023] Figure 3 This is a three-dimensional structural diagram of Example 1 of the utility model;

[0024] Figure 4 This is an exploded view of Example 1 of the utility model;

[0025] Figure 5 This is a schematic diagram of the connection relationship between the additional component and the pressure plate in Example 1 of the utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the additional components in Example 1 of the utility model;

[0027] Figure 7 It is a side view of the additional component in Example 1 of the utility model;

[0028] Figure 8 It is a three-dimensional structural diagram of the additional components in Example 1 of the utility model;

[0029] Fig. 9 for Figure 8 A partial enlarged view of the middle A;

[0030] Fig.10 It is a cross-sectional view of the connection position between the pressure plate and the additional pressure needle strip in Example 1 of the utility model;

[0031] Fig.11 This is a diagram showing the position relationship between the embodiment 1 of the utility model and the welding strip when in use;

[0032] Fig.12 This is a schematic diagram of the structure of Example 2 of the utility model.

[0033] Among them, 1. pressure plate; 2. longitudinal connecting ribs; 3. pressure needle strip; 4. pressure plate; 5. screw hole on the end face of the press; 6. first anti-collision block; 7. additional pressure needle strip; 8. limit block; 9. hexagon socket bolt; 10. second anti-collision block; 11. bolt countersunk hole; 12. hollow area; 13. welding strip; 14. additional pressure needle strip one; 15. additional pressure needle strip two; 41. buffer pad. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0035] The development of the photovoltaic industry has been in an explosive period, and the use cycle of related manufacturing equipment is generally less than 2 to 3 years before facing technological iteration. It turned out that old equipment and tooling were sold as low-end technology to recover cash flow. At present, the technological iteration of the photovoltaic industry is indeed rapid. The industry's SMBB technology (16 main grids) has only been mass-produced for about a year, and it is facing the impact of rectangular silicon wafer technology. The equipment that has been invested needs to continue to be transformed, resulting in a large sunk cost. The internal volume of the industry has accelerated the technological iteration of the photovoltaic industry, and the compatibility of new products, new technologies, and new processes of production equipment has become increasingly prominent. The rectangular photovoltaic battery module products that are currently popular and have reached a consensus in the industry will inevitably become the mainstream, and in addition to the need to transform the production equipment that has been invested, some consumables such as tooling and fixtures are also facing elimination. This is a huge waste. The purpose of the utility model is to propose a universal string welding press to solve the problem of the continuous availability of string welding machine presses in the 1000GW stock market and stabilize the value of production materials.

[0036] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] Embodiment 1:

[0038] Reference Figures 1 to 11 As shown, Example 1 of the utility model provides a universal string welding press for photovoltaic cells of different sizes, including a press body, and an additional component installed on one side or both sides of the press body along the direction of the welding strip 13, wherein the additional component is detachably connected to the side of the press body.

[0039] Specifically, the pressing tool body can be the structure disclosed in this embodiment, or can be an old specification pressing tool of the prior art. Taking the structure disclosed in this embodiment as an example, Figure 3As shown, the pressing tool body includes a plurality of pressing pin strips 3 arranged at equal intervals along the longitudinal direction (Y direction in the figure) and pressing plates 1 fixedly connected to both ends of the pressing pin strips 3. The same number of pressing plates 4 are connected to each pressing pin strip 3 at equal intervals along the transverse direction (X direction in the figure). Each pressing plate 4 is on the same axis in the transverse direction and also in the same axis in the longitudinal direction. The plurality of pressing plates 4 located on the same axis in the longitudinal direction are used together to make close contact with a welding strip 13 on the battery cell.

[0040] In this embodiment, a plurality of longitudinal connecting ribs 2 are arranged at intervals along the length direction of the pressing needle strips 3 (X direction in the figure), and the longitudinal connecting ribs 2 are perpendicular to the pressing needle strips 3 and penetrate and connect the pressing needle strips 3, forming a criss-cross structure with the pressing needle strips 3. A plurality of hollow areas 12 are formed between the adjacent pressing needle strips 3 and the longitudinal connecting ribs 2 in the middle of the press body, so that the near-infrared light source can directly irradiate the battery cell. The pressing needle strips 3 and the longitudinal connecting ribs 2 have a narrow width, so that the hollow area 12 of the entire press body accounts for more than 60%.

[0041] In this embodiment, the pressing needle strips 3 and the longitudinal connecting ribs 2 are made of aluminum alloy or stainless steel. At the same time, each pressing needle strip 3 and the longitudinal connecting rib 2 can be integrally formed.

[0042] like Figures 6 to 10 As shown, the additional component includes at least one additional pressure needle strip 7, and the additional pressure needle strip 7 is connected to pressure plates 4 corresponding to the number and position of the pressure needle strip 3 at equal intervals along the length direction.

[0043] In this embodiment, each pressure plate 4 on the pressure needle bar 3 is elastically connected to the pressure needle bar 3, and the pressure plate 4 on the additional pressure needle bar 7 is elastically connected to the additional pressure needle bar 7. The additional pressure needle bar 7 adopts the same structure and size as the pressure needle bar 3, and the material is preferably aluminum alloy.

[0044] like Fig.10 As shown, the pressure plate 4 is connected to the additional pressure needle strip 7 through a spring. Specifically, the additional pressure needle strip 7 is provided with a plurality of connection grooves for installing the pressure plate 4. One end of the spring is fixedly connected to the bottom of the connection groove, and the other end is connected to the bottom end of the pressure plate 4. The pressure plate 4 has an end surface higher than the surface of the additional pressure needle strip 7, which is used to contact the welding strip 13. A buffer pad 41 is fixedly connected to the end surface of the pressure plate 4 to avoid scratches on the surface of the welding strip 13.

[0045] In this embodiment, the additional component includes an additional pressure pin strip 7. In some other embodiments, the additional component may include two or more additional pressure pin strips 7 arranged side by side and at intervals, in order to achieve a larger size range expansion. In practical applications, selection is made according to demand. Taking an additional pressure pin strip 7 of this embodiment as an example, a plurality of limit blocks 8 are connected to one side of the additional pressure pin strip 7 (the side connected to the outermost pressure pin strip 3 of the press body). The number and position of the limit blocks 8 are preferably corresponding to the longitudinal connecting ribs 2 for easy installation. The limit blocks 8 can be integrally formed with the additional pressure pin strip, or can be welded or detachably connected.

[0046] To further optimize the solution, the limit block 8 and the additional pressure needle strip 7 are connected in a detachable manner, which makes it easy to replace the limit blocks 8 of different specifications according to different needs. Since the two ends of the limit block 8 are respectively against the pressure needle strip 3 and the additional pressure needle strip 7, the length of the limit block 8 determines the distance between the additional pressure needle strip 7 and the press body, which plays a regulating role in the expansion size. Therefore, the limit block 8 is provided with a plurality of different models for selection. In actual use, the connection method can be achieved by passing through the hexagon socket bolt 9 to connect to the pressure needle bar 3 after the additional pressure needle bar 7 and the limit block 8. Therefore, a plurality of press end face screw holes 5 are opened on the outside of the pressure needle bar 3 (in the present embodiment, preferably at the end of the longitudinal connecting rib 2), and at the same time, bolt countersunk holes 11 corresponding to the press end face screw holes 5 are opened on the additional pressure needle bar 7, and bolt through holes passing through both ends of the limit block 8 are opened. During installation, the hexagon socket bolt 9 is passed through the additional pressure needle bar 7 and the limit block 8 in turn and then fastened to the press end face screw hole 5.

[0047] To further optimize the solution, the bolt countersunk hole 11 opened on the pressure needle strip 7 is a T-shaped hole that can accommodate the hexagon socket bolt 9 as a whole, so that the nut of the hexagon socket bolt 9 can also enter the bolt countersunk hole 11, and a scale line can be preset in the bolt countersunk hole 11 to determine whether the hexagon socket bolt 9 is installed in place or whether it is loose.

[0048] In the above structure, the additional pressure pin strip 7 can be quickly assembled through the detachable hexagon socket bolts 9 or other fastening connectors, and the availability of the press can be maintained, for example, the press size requirements of flatness, concentricity, and coplanarity.

[0049] By means of the limit blocks 8 of different lengths, the width of the new pressing tool formed by the additional component and the original pressing tool body is adjusted to adapt to the lengths of different rectangular batteries, thereby achieving a compatible effect.

[0050] By installing the above-mentioned additional component on one side of the press body, the string welding press of this embodiment can be compatible with battery cells with size specifications of: 182, 183.75, 185, 186.8, 188, 191.6, 199, 210 and half-cell batteries of the above specifications.

[0051] According to a further optimization scheme, anti-collision blocks located at both ends of the additional component can be detachably connected to the side of the press body to which the additional component is connected, and the longitudinal width and thickness of the anti-collision blocks are greater than those of the additional component.

[0052] According to a further optimized solution, the two anti-collision blocks are fixedly connected to both ends of the additional component.

[0053] According to a further optimization scheme, the additional component is made of aluminum alloy, and the anti-collision block is made of a metal material having a strength higher than that of the additional component.

[0054] Embodiment 2:

[0055] Reference Fig.12 As shown, Example 2 of the utility model provides another universal string welding press based on photovoltaic cells of different sizes, including a press body and two additional components located on both sides of the press body, the two additional components are symmetrically connected to the pressure needle strips 3 on the edges of both sides of the press body, and anti-collision blocks are provided at both ends of the two additional components. This embodiment makes the string welding press suitable for photovoltaic cells of different sizes by expanding and adding new structures on both sides of the press body, thereby achieving similar functions as Example 1 and producing the same technical effects.

[0056] It should be understood that in actual applications, the driving mechanism may also be other driving structures or mechanical devices that can realize linear motion functions / rotational motion / telescopic motion, for example, it may be a servo motor, a hydraulic cylinder, an electric cylinder, and the like.

[0057] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0058] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to 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 invention.

[0059] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A universal string welding press for photovoltaic cells of different sizes, characterized in that: It comprises a pressing tool body, wherein at least one side of the pressing tool body along the direction of the welding strip (13) is detachably connected with an additional component; The pressing tool body comprises a plurality of pressing needle bars (3) arranged at equal intervals in the longitudinal direction and pressing plates (1) fixedly connected to both ends of the pressing needle bars (3); each of the pressing needle bars (3) is connected to the same number of pressing plates (4) at equal intervals in the transverse direction, and each of the pressing plates (4) is located on the same axis in the transverse / longitudinal direction; The mounting component comprises at least one mounting pressure needle strip (7), and the mounting pressure needle strip (7) is connected to pressure plates (4) corresponding in number and position to those on the pressure needle strip (3) at equal intervals along the length direction.

2. The universal string welding press for photovoltaic cells of different sizes according to claim 1, characterized in that: The side of the press body connected to the added component can also be detachably connected to anti-collision blocks located at both ends of the added component, and the longitudinal width and thickness of the anti-collision blocks are both greater than the added component.

3. The universal string welding press for photovoltaic cells of different sizes according to claim 2, characterized in that: The two anti-collision blocks are fixedly connected to the two ends of the mounting component.

4. The universal string welding press for photovoltaic cells of different sizes according to claim 2 or 3, characterized in that: The added component is made of aluminum alloy, and the anti-collision block is made of a metal material having a higher strength than that of the added component.

5. The universal string welding press for photovoltaic cells of different sizes according to claim 2, characterized in that: The mounting component is connected to the outer side surface of the pressure needle strip (3) via a hexagon socket bolt (9); and the anti-collision block is connected to the outer side surface of the pressure plate (1) via a hexagon socket bolt (9).

6. The universal string welding press for photovoltaic cells of different sizes according to claim 1, characterized in that: The pressure plate (4) is elastically connected to the pressure needle strip (3) / the additional pressure needle strip (7).

7. The universal string welding press for photovoltaic cells of different sizes according to claim 1, characterized in that: The additional pressure needle strip (7) is connected to a side facing the press body with a plurality of limit blocks (8); when the additional component is installed on the side of the press body, the distance between the additional pressure needle strip (7) and the press body can be adjusted by adjusting the length of the limit blocks (8).

8. The universal string welding press for photovoltaic cells of different sizes according to claim 7, characterized in that: The pressing tool body also includes a plurality of longitudinal connecting ribs (2) vertically penetrating through and connecting the pressing needle strips (3).

9. The universal string welding press for photovoltaic cells of different sizes according to claim 8, characterized in that: The two ends of the longitudinal connecting rib (2) are provided with end face screw holes (5) of a press for mounting the additional component, and the additional component is provided with bolt countersunk holes (11) penetrating the additional pressure needle strip (7) and the limit block (8), and the bolt countersunk holes (11) correspond in position to the end face screw holes (5) of the press.

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