Tool for outgoing line of bus bar of photovoltaic module
By setting out projecting holes and tooling main body on the back plate of the photovoltaic module and setting lead holes on the tooling main body, the problem of the bus bar forming protrusions due to stress concentration during the lamination process is solved, and the effect of avoiding cell lobes and improving production efficiency is achieved.
Patent Information
- Application Number
- CN202421563132.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During the lamination of the photovoltaic module, the bus bar forms outward protrusions due to the concentration of stress, resulting in cell lobes.
A workpiece for bus bar outlet for photovoltaic modules is designed. By setting out projecting holes on the back plate and setting up a tool body in the projecting hole, a lead hole through its body is provided on the tool body, and the lead holes and bus bar gaps are matched to limit the bending angle and shape of the bus bar.
It effectively avoids the material forming outward protrusions at the bends, prevents cell lobes, and improves the reliability and production efficiency of the components.
Smart Images
Figure CN222840018U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of photovoltaic cells, and in particular relates to a tool for busbar outlets of photovoltaic components. Background Art
[0002] In photovoltaic modules, in some cases, bus bars are provided on the cells for connecting the welding strips on each cell, which can effectively collect the current from each cell / string so as to output it to the junction box or the main cable of the solar panel.
[0003] During the manufacturing process, in order to avoid short circuits caused by contact between two adjacent busbars, the busbars are usually bent 180° in the opposite direction to the outside of the backplane. The busbars are thin-walled metal parts. During the lamination process, the metal material on the inside of the busbar is compressed, while the metal material on the outside is stretched. Due to the large strain difference between the inside and the outside, stress concentration is easily generated on the curved surface of the bend. This stress concentration will cause the material to form an outward bulge at the bend, which bulges toward the battery cell and causes the battery cell to crack during the lamination process. Utility Model Content
[0004] The utility model provides a tool for busbar outlets of a photovoltaic component, aiming to solve the problem that a busbar forms a bulge toward a battery cell during a lamination process, causing the battery cell to crack.
[0005] The utility model is implemented as follows: a tooling for busbar outlet of a photovoltaic module, wherein an extension hole for allowing the busbar to extend out is arranged on the back plate of the photovoltaic module, a tooling body is arranged in the extension hole, a lead hole passing through the tooling body is arranged on the tooling body, and the lead hole is gap-matched with the busbar.
[0006] In one embodiment, the tool body and the extension hole are clearance-matched.
[0007] In one embodiment, a flange is provided at one end of the tool body, and a projection of the flange on the back plate is larger than a projection of the extension hole on the back plate.
[0008] In one embodiment, the height of the flange is 1 mm to 2 mm.
[0009] In one embodiment, the flange extends out along the outer edge of the tool body, and the length of the extension is greater than or equal to 2 mm.
[0010] In one embodiment, two wire lead holes are provided on the tool body, and the two wire lead holes are arranged opposite to each other.
[0011] In one embodiment, the tool body is made of high temperature resistant material.
[0012] In one embodiment, the extension hole is a circular hole, and the outer wall of the tool body is a cylindrical shape that matches the extension hole.
[0013] In one embodiment, the thickness of the tooling body is less than or equal to the thickness of the back plate.
[0014] In one embodiment, a chamfer is provided at one end of the tool body extending into the extension hole.
[0015] The beneficial effect achieved by the utility model is that a tooling body is arranged in the extension hole, and a lead hole is arranged on the tooling body which penetrates the tooling body and fits with the gap of the bus bar. The lead hole provides a limit for the bus bar, and the bending angle and bending shape of the bus bar when it is bent are limited by the lead hole, so it is effectively avoided that the material forms an outward bulge at the bending place, thereby avoiding the battery cell from cracking. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of the tooling for the busbar outlet of the photovoltaic module provided by the utility model;
[0017] Figure 2 The utility model is a schematic diagram of the use of the tooling for photovoltaic module busbar outlets provided by the utility model.
[0018] Description of reference numerals:
[0019] 100. Tooling for busbar outlet of photovoltaic module; 101. Tooling body; 102. Lead hole; 103. Flanging;
[0020] 200, back panel;
[0021] 300, bus bar;
[0022] 400. Battery cells. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In addition, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.
[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "left", "right", "horizontal", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, 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. Therefore, they should not be understood as limitations on the present invention.
[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0028] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.
[0029] The utility model arranges a tooling body in the extension hole, and a lead hole is arranged on the tooling body, which penetrates the tooling body and matches with the gap of the bus bar. The lead hole provides a limit for the bus bar, and the bending angle and bending shape of the bus bar when it is bent are limited by the lead hole, which effectively avoids the material from forming an outward bulge at the bending place, thereby avoiding the battery cell from cracking.
[0030] Embodiment 1
[0031] like Figure 1 and Figure 2 As shown, this embodiment provides a tooling 100 for busbar outlet of a photovoltaic module. An extension hole for allowing the busbar 300 to extend out is provided on the back plate 200 of the photovoltaic module, and a tooling body 101 is provided in the extension hole. A lead hole 102 passing through the tooling body 101 is provided on the tooling body 101, and the lead hole 102 is gap-matched with the busbar 300.
[0032] The fixture 100 for busbar outlet of photovoltaic module includes a fixture body 101, which is arranged in the extension hole on the back plate 200 of the photovoltaic module. The side wall of the fixture body 101 is matched with the side wall of the extension hole, and the extension hole provides a limit for the fixture body 101. The top surface and the bottom surface of the fixture body 101 are connected by the side wall of the fixture body 101, and the fixture body 101 is provided with a lead hole 102, which passes through the top surface and the bottom surface of the fixture body 101. The lead hole 102 can allow the busbar 300 to pass through, and the lead hole 102 and the busbar 300 have a clearance fit, and the lead hole 102 can provide guidance and limit for the busbar 300.
[0033] It can be understood that the extension hole can be a square hole, a round hole or an elliptical hole, or a through hole of other shapes, and the outer wall of the tooling body 101 is adapted to the shape of the extension hole.
[0034] When in use, the busbar 300 passes through the bottom surface to the top surface of the tooling body 101 along the guiding direction of the lead hole 102. During the lamination process, due to the limitation of the lead hole 102, the bending angle and bending shape of the busbar 300 are limited when it is bent, effectively preventing the material from forming an outward bulge at the bending point.
[0035] On the other hand, if the busbar 300 extends directly from the extension hole, bubbles may form during the lamination process if the material at the extension hole position is not fully exhausted or is subjected to uneven pressure. This not only affects the aesthetics of the component, but may also reduce the reliability and performance of the component. The tooling body 101 is arranged in the extension, and the busbar 300 extends from the lead hole 102, so that the material can be more evenly distributed during the lamination process, avoiding bubbles formed due to the inability to exhaust air, better exhausting air, and reducing the formation of bubbles.
[0036] In this embodiment, a tooling body 101 is arranged in the extension hole, and a lead hole 102 is arranged on the tooling body 101, which passes through the tooling body 101 and is gap-matched with the bus bar 300. The lead hole 102 provides a limit for the bus bar 300. When the bus bar 300 is bent, the bending angle and bending shape are limited by the lead hole 102, which effectively prevents the material from forming an outward bulge at the bending place, thereby preventing the battery cell 400 from breaking.
[0037] Embodiment 2
[0038] On the basis of the first embodiment, the tool body 101 is clearance-matched with the extension hole.
[0039] The tooling body 101 is installed in the extension hole, and the tooling body 101 and the extension hole are matched with each other to ensure that the tooling body 101 will not have excessive displacement when subjected to force, thereby providing stable support. At the same time, it ensures that the connection between the tooling body 101 and the extension hole is not too tight, making it convenient for the tooling body 101 to be disassembled and assembled in the extension hole.
[0040] Embodiment 3
[0041] On the basis of the first embodiment, a flange 103 is provided at one end of the tool body 101 , and the projection of the flange 103 on the back plate 200 is larger than the projection of the extension hole on the back plate 200 .
[0042] The flange 103 is designed to form a protruding edge at one end of the tool body 101, and the edge extends outside the extension hole. Since the projection area of the flange 103 is larger than the projection area of the extension hole, the tool body 101 forms a stable support point on the surface of the back plate 200 through the flange 103, thereby preventing the tool body 101 from moving or falling off at will.
[0043] Specifically, the flange 103 is arranged on the top surface of the tooling body 101. When the tooling body 101 is installed into the extension hole, the flange 103 is clamped on the outside of the back plate 200, limiting the installation depth of the tooling body 101. When the tooling body 101 needs to be removed, the flange 103 provides a good fulcrum for easy removal. The installation and adjustment steps are simplified, the difficulty of operation for workers is reduced, the production efficiency is improved, and the scrap rate caused by the instability of the tooling is also reduced.
[0044] In one embodiment, the height of the flange 103 is 1 mm to 2 mm.
[0045] If the height of the flange 103 is too high, the busbar 300 will be deformed along the flange 103 during lamination, affecting the subsequent process, while if the height of the flange 103 is too low, it cannot provide sufficient support. Setting the height of the flange 103 to 1 mm to 2 mm ensures sufficient support without affecting other operations.
[0046] In one embodiment, the flange 103 extends along the outer edge of the tool body 101 , and the length of the extension is greater than or equal to 2 mm.
[0047] The flange 103 extends too small to provide sufficient support to stabilize the tool body 101. The flange 103 extends along the outer edge of the tool body 101, and the extension length is greater than or equal to 2 mm, providing a stable support structure to ensure that the tool body 101 is not easy to move in the extension hole.
[0048] Embodiment 4
[0049] On the basis of the first embodiment, two lead holes 102 are provided on the tool body 101 , and the two lead holes 102 are arranged opposite to each other.
[0050] In the photovoltaic field, a junction box is usually placed outside the back sheet 200. The junction box is an important part of the photovoltaic module and is mainly used to protect the electrical connection points from the external environment (such as moisture, dust and mechanical damage). It provides a safe and reliable electrical connection platform for the photovoltaic module. The diode is set in the junction box, mainly to prevent the reverse current from damaging the photovoltaic module and to ensure that the current output by each module is not wasted, thereby improving the efficiency and power generation of the entire photovoltaic system.
[0051] One pin of the diode is connected to a bus bar 300, and the other pin is connected to another bus bar 300. In this way, under normal working conditions, current is transmitted through the bus bar 300; when reverse current occurs, the diode can play a blocking role. The spacing of the bus bar 300 and the width of the welding points at both ends of the diode must be matched, so as to ensure that the pins of the diode can be accurately welded to the bus bar 300 and ensure the reliability of the electrical connection.
[0052] Two lead holes 102 are provided on the tooling body 101, and the two lead holes 102 are arranged opposite to each other, which can provide limitation and guidance for the two bus bars 300 respectively, so as to ensure that the two bus bars 300 can be better connected to one pin of the diode respectively.
[0053] Embodiment 5
[0054] On the basis of the first embodiment, the tool body 101 is made of high temperature resistant material.
[0055] Lamination firmly combines the photovoltaic cell 400 with the packaging material (such as EVA, back sheet 200, glass, etc.) through high temperature and high pressure. The lamination temperature must reach the melting temperature of the packaging material (such as EVA) to ensure that it is fully bonded. Usually, the melting temperature of EVA is between 140°C and 160°C.
[0056] During lamination, in order to prevent the tooling body 101 from melting or deforming, the tooling body 101 is made of a high temperature resistant material. Preferably, in order to prevent the busbar 300 from being damaged by the lead hole 102, the tooling body 101 can be made of an elastic material, such as silicone, high temperature resistant rubber, etc.
[0057] Embodiment 6
[0058] On the basis of the first embodiment, the extension hole is a circular hole, and the outer wall of the tooling body 101 is a cylindrical shape matching the extension hole.
[0059] Usually, the back plate 200 is a glass plate. Glass is brittle and difficult to process. The protruding hole is a round hole for easy processing. The round hole design makes the stress more evenly distributed at the edge of the hole, avoiding stress concentration. Compared with holes of other shapes (such as square or oval), round holes can effectively reduce stress concentration points and reduce the risk of glass breakage during use. And the edges of round holes do not have sharp corners, so cracks are not easy to expand from the edges of the holes. When the glass material is impacted by external force, the round hole can effectively alleviate stress concentration and reduce the possibility of crack formation and expansion, which is beneficial to ensure the quality of the back plate 200.
[0060] Embodiment 7
[0061] On the basis of the first embodiment, the thickness of the tooling body 101 is less than or equal to the thickness of the back plate 200 .
[0062] The thickness of the tooling body 101 is strictly controlled to be less than or equal to the thickness of the back plate 200, and the tooling body 101 can be perfectly embedded in the back plate 200 to avoid unnecessary extrusion and stress on the battery cell 400 due to the excessive length of the tooling body 101. This ensures that the normal working state of the battery cell 400 is not affected during installation and operation, protects the battery cell 400, and prolongs the service life of the photovoltaic module.
[0063] Embodiment 8
[0064] On the basis of the first embodiment, a chamfer is provided at one end of the tool body 101 extending into the extension hole.
[0065] The chamfer design can reduce stress concentration when the tool body 101 is inserted into the extension hole of the back plate 200, and avoid material stress concentration and damage caused by overly sharp edges. The chamfer makes the tool body 101 smoother when inserted into the extension hole, reduces friction, improves assembly efficiency, and avoids damage to the back plate 200 and other components during the insertion process.
[0066] Specifically, the chamfer angle can be designed to be between 30° and 45°, which can ensure that stress concentration can be effectively reduced and insertion smoothness can be improved.
[0067] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A photovoltaic module busbar outlet tool, characterized in that: The back plate of the photovoltaic module is provided with an extension hole for allowing the busbar to extend out, a tool body is arranged in the extension hole, a lead hole penetrating the tool body is arranged on the tool body, and the lead hole is gap-matched with the busbar.
2. The photovoltaic module busbar outlet tooling as claimed in claim 1, characterized in that: The tool body is clearance-matched with the extension hole.
3. The photovoltaic module busbar outlet tooling as claimed in claim 1, characterized in that: A flange is arranged at one end of the tool body, and a projection of the flange on the back plate is larger than a projection of the extension hole on the back plate.
4. The photovoltaic module busbar outlet tooling as claimed in claim 3, characterized in that: The height of the flange is 1 mm to 2 mm.
5. The photovoltaic module busbar outlet tooling as claimed in claim 3, characterized in that: The flange extends along the outer edge of the tool body, and the length of the extension is greater than or equal to 2 mm.
6. The photovoltaic module busbar outlet tooling as claimed in claim 1, characterized in that: Two lead holes are arranged on the tooling body, and the two lead holes are arranged opposite to each other.
7. The photovoltaic module busbar outlet tooling as claimed in claim 1, characterized in that: The tooling body is made of high temperature resistant material.
8. The photovoltaic module busbar outlet tooling as claimed in claim 1, characterized in that: The extension hole is a circular hole, and the outer wall of the tooling body is a cylindrical shape matched with the extension hole.
9. The photovoltaic module busbar outlet tooling as claimed in claim 1, characterized in that: The thickness of the tooling body is less than or equal to the thickness of the back plate.
10. The photovoltaic module busbar outlet tooling as claimed in claim 1, characterized in that: One end of the tool body extending into the extension hole is chamfered.