Frame and photovoltaic installation structure

Abstract

This application belongs to the field of photovoltaic technology, and particularly relates to a frame and photovoltaic mounting structure. The frame includes a rectangular frame having a first surface, a second surface opposite to the first surface, a third surface, and a fourth surface opposite to the third surface. A mounting slot for mounting photovoltaic modules is provided on the outer side of the second surface of the frame. The frame further includes mounting portions extending from the fourth surface of the frame, including a first mounting portion and a second mounting portion. Both the first and second mounting portions are connected to the fourth surface and extend away from it, with their intersection lines with the fourth surface lying on the same straight line. The extension length of the first mounting portion is L1, and the extension length of the second mounting portion is L2, where L1 > L2. In this application, the different extension lengths of the first and second mounting portions form an avoidance gap, preventing obstruction of the cells in the photovoltaic module, thus enabling the photovoltaic mounting structure with this frame to have relatively high power generation efficiency.

Description

Technical Field

[0001] This application belongs to the field of photovoltaic technology, and in particular relates to a frame and photovoltaic installation structure. Background Technology

[0002] Bifacial technology is a technology that allows solar panels to generate electricity using sunlight from both the front and back. Compared to traditional single-sided panels, bifacial panels can utilize sunlight more fully, including direct, reflected, and diffused light, thus significantly improving photoelectric conversion efficiency. From the cell side, bifaciality is improved primarily through techniques such as reducing backside light reflection, reducing backside film absorption, and minimizing backside grid line shading. From the module side, bifaciality is improved by using backside encapsulation materials with higher light transmittance or by reducing shading. Both methods increase bifaciality by maximizing the utilization of backside sunlight radiation to increase the backside power of the cells, thereby improving the bifaciality.

[0003] An important auxiliary material for modules is the module frame. In existing double-glass technology, since the bottom of the frame needs to be used for fixing and installing to the support frame, the bottom of the frame must be reserved with a sufficiently large fixing and installation edge to ensure the frame's anti-torsion performance. This installation edge will block the cells on the back of the module to a certain extent, affecting the power generation efficiency of the back of the module. Utility Model Content

[0004] This application provides a frame and photovoltaic installation structure to solve the technical problem of low power generation efficiency caused by the frame blocking the photovoltaic module in the prior art.

[0005] This application provides a frame, including: a frame body, the frame body being rectangular, having a first surface, a second surface opposite to the first surface, a third surface, and a fourth surface opposite to the third surface; an mounting slot for mounting photovoltaic modules is provided on the outer side of the second surface of the frame body, the frame further including a mounting portion extending from the fourth surface of the frame body, the mounting portion including a first mounting portion and a second mounting portion, both the first mounting portion and the second mounting portion being connected to the fourth surface and extending in a direction away from the fourth surface, and their intersection lines with the fourth surface being on the same straight line, the extension length of the first mounting portion being L1, the extension length of the second mounting portion being L2, and L1 > L2.

[0006] In an optional embodiment of this application, the second mounting portion includes a connecting portion that is perpendicularly connected to the fourth surface, and an extension portion that bends out from the end of the connecting portion.

[0007] In an optional embodiment of this application, the cross-section of the extension is arc-shaped and extends toward the fourth surface.

[0008] In an optional embodiment of this application, the cross-section of the extension is rectangular, and it extends in a direction parallel to the fourth surface.

[0009] In an optional embodiment of this application, the extension portion is spaced apart from the first mounting portion.

[0010] In an optional embodiment of this application, the width of the connecting portion along the direction perpendicular to the fourth surface is L4, where 0.5cm≤L4≤1.8cm.

[0011] In an optional embodiment of this application, the frame further includes a limiting portion disposed on the second surface. The limiting portion forms a mounting groove with the second surface and includes a first limiting portion extending vertically from the second surface and a second limiting portion extending from the end of the first limiting portion in a direction parallel to the second surface. The sum of the height of the third surface and the height of the first limiting portion is B, and the ratio of L1 to B is 0.37 to 0.92.

[0012] In the optional schemes of this application, 2.5cm≤B≤3.5cm, 1.3cm≤L1≤2.3cm, the sum of the width of the first surface and the width of the first mounting part is C, and 2.5cm≤C≤3.5cm.

[0013] Another aspect of this application provides a photovoltaic mounting structure, including a photovoltaic module and the aforementioned frame, wherein the frame is disposed on opposite sides of the photovoltaic module, and the mounting slot of the frame accommodates the edge of the photovoltaic module.

[0014] In an optional embodiment of this application, the outer edge of the projection of the second mounting part on the photovoltaic module is flush with the outer edge of the cell in the photovoltaic module.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] The frame provided in this application includes a rectangular frame, with a first surface and a second surface on opposite sides in the height direction, and a third surface and a fourth surface on opposite sides in the width direction. A mounting groove for engaging and positioning photovoltaic modules is formed on the outer side of the second surface, and a mounting portion extends vertically from the fourth surface.

[0017] The mounting section is divided into a first mounting section and a second mounting section. The first mounting section and the second mounting section extend at different distances, with the first mounting section extending longer than the second mounting section. This creates an avoidance gap, preventing the photovoltaic modules from being blocked and enabling the photovoltaic mounting structure with this frame to have relatively high power generation efficiency.

[0018] Furthermore, the second mounting section adopts a rolled edge design with a horizontal section, which ensures the anti-torsional strength after splicing with the support frame while retaining the anti-bending performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a photovoltaic installation structure provided according to one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of a border provided according to one embodiment of this application;

[0022] Figure 3 This is a schematic diagram of a border provided according to yet another embodiment of this application;

[0023] Figure 4 for Figure 3 A magnified view of a section at point S in the middle;

[0024] Figure 5 This is a side view of a frame provided according to one embodiment of the present application from a certain perspective.

[0025] Figure Labels

[0026] 100. Photovoltaic installation structure;

[0027] 10. Border;

[0028] 11. Frame; 111. First surface; 112. Second surface; 113. Third surface; 114. Fourth surface; E. Mounting slot;

[0029] 12. Limiting part; 121. First limiting part; 122. Second limiting part;

[0030] 13. Mounting section; 131. First mounting section; 132. Second mounting section; 1321. Connecting section; 1322. Extension section;

[0031] 20. Photovoltaic modules; 21. Batteries. Detailed Implementation

[0032] To make the above and other features and advantages of this application clearer, the application is further described below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explanation to those skilled in the art and are exemplary only, not restrictive.

[0033] Figure 1 This is a schematic diagram of a photovoltaic mounting structure 100 according to one embodiment of this application. Please refer to... Figure 1 The photovoltaic installation structure 100 includes a frame 10 and photovoltaic modules 20.

[0034] The photovoltaic module 20 can refer to a double-glass photovoltaic module, meaning that both sides can generate electricity using sunlight. The frame 10 is used to fix the photovoltaic module 20 in place and works in conjunction with the support frame.

[0035] Please see Figure 2 and Figure 3 The frame 10 includes a frame 11, which is a rectangular body having a first surface 111, a second surface 112 opposite to the first surface 111, a third surface 113, and a fourth surface 114 opposite to the third surface 113.

[0036] It should be noted that the frame 10 can be a profile, and the frame 11 has a hollow structure. The first surface 111, the second surface 112, the third surface 113, and the fourth surface 114 all refer to the outer surfaces of the rectangular frame 11. In this embodiment, the direction of the first surface 111 toward the second surface 112 is the height direction of the frame 11, the direction of the third surface 113 toward the fourth surface 114 is the width direction of the frame 11, and the extension direction of the frame 11 along the third surface 113 and the fourth surface 114 is the length direction.

[0037] A first limiting portion 121 and a second limiting portion 122 are formed above the second surface 112. The first limiting portion 121, the second limiting portion 122, and the second surface 112 together form a mounting slot E for receiving and fixing the photovoltaic module 20.

[0038] In this embodiment, the frame 10 is disposed on opposite sides of the photovoltaic module 20, and the mounting slot E of the frame 10 accommodates the edge of the photovoltaic module 20. In other words, the opposite edges of the photovoltaic module 20 are limited and fixed by the mounting slot E on the frame 10 on both sides.

[0039] It should be noted that the photovoltaic module 20 is generally rectangular in shape, and the opposite sides of the photovoltaic module 20 here refer to the opposite sides in its length or width direction. In addition, in the illustrated embodiment, the photovoltaic module 20 is snapped and limited on the opposite sides in the width direction of the frame 10.

[0040] Furthermore, the frame 10 includes a mounting portion 13 extending from the fourth surface 114 of the frame 11. The mounting portion 13 includes a first mounting portion 131 and a second mounting portion 132. Both the first mounting portion 131 and the second mounting portion 132 are connected to the fourth surface 114 and extend in a direction away from the fourth surface 114, with their intersection lines with the fourth surface 114 lying on the same straight line. The extension length of the first mounting portion 131 is L1, and the extension length of the second mounting portion 132 is L2, where L1 > L2. The outer edge of the projection of the second mounting portion 132 onto the photovoltaic module 20 is flush with or offset from the outer edge of the cell 21 in the photovoltaic module 20.

[0041] It should be noted that the photovoltaic module 20 is a composite layer structure module composed of multiple material layers stacked together. The cell 21 in the photovoltaic module 20 refers to the solar cell that can convert solar energy into electrical energy. As for the other constituent layers of the photovoltaic module 20, they are not related to the inventive point of this case and will not be described here.

[0042] In this embodiment, the mounting part 13 extends from the fourth surface 114 in a direction perpendicular to the fourth surface 114. It should be understood that if the mounting part 13 extends too far, it will block the cell 21 in the photovoltaic module 20, thereby reducing the power generation efficiency.

[0043] To avoid the aforementioned problems, the mounting portion 13 is divided into two parts, namely the first mounting portion 131 and the second mounting portion 132. The extension length of the second mounting portion from the fourth surface 114 is less than the extension length of the first mounting portion 131, i.e., L2 < L1. The first mounting portion 131 extends a relatively long distance and is provided with mounting holes to facilitate splicing with the support frame. The second mounting portion 132 extends a relatively short distance, and it is ensured that the projection of the second mounting portion 132 on the photovoltaic module 20 is offset from the cell 21 in the photovoltaic module 20. Here, offset means that the projection of the second mounting portion 132 and the cell 21 will not overlap.

[0044] As can be seen, the mounting part 13 adopts the above design to form a shape that is partially concave towards the fourth surface 114, that is, an avoidance gap is formed at the mounting part 13, which enables the projection of the second mounting part 132 in the mounting part 13 onto the photovoltaic module 20 to not overlap with the battery 21, thereby avoiding the reduction of the power generation efficiency of the photovoltaic module 20 due to the shading of the mounting part 13.

[0045] exist Figure 2 and Figure 3In the embodiment shown, the width direction of the frame 11 is perpendicular to the fourth surface 114, the length of the mounting part 13 can be equal to the length of the frame 11, and the first mounting part 131 can be located at the end of the frame 11 in the length direction.

[0046] It should be understood that the extension distance of the second mounting portion 132 has a certain impact on the structural strength of the frame 10; the greater the extension distance, the higher the structural strength. Preferably, the outer edge of the projection of the second mounting portion 132 on the photovoltaic module 20 is flush with the outer edge of the cell 21 in the photovoltaic module 20. In this case, the extension distance of the second mounting portion 132 is maximized to ensure the structural strength of the frame 10. It should be noted that "flush" here means that the outer edges of the two are aligned, without any overlap.

[0047] In some alternative embodiments, the second mounting portion 132 includes a connecting portion 1321 that is perpendicularly connected to the fourth surface 114, and an extension portion 1322 that bends out from the end of the connecting portion 1321.

[0048] In this embodiment, the second mounting part 132 is mainly composed of the connecting part 1321 and the extension part 1322. The connecting part 1321 is located between the extension part 1322 and the fourth surface 114 in the width direction of the frame 11, and can play the role of connecting the fourth surface 114 and the extension part 1322.

[0049] In practical applications, the connecting part 1321 is a horizontal plate extending from the fourth surface 114 and its outer surface is flush with the first surface 111, which ensures that the second mounting part 132 has a certain horizontal width, thus ensuring the contact area with the support frame, thereby ensuring the connection strength between the frame 10 and the support frame at the splice, mainly reflected in the anti-torsion strength.

[0050] In one alternative embodiment, such as Figure 2 As shown, the extension 1322 has an arc-shaped cross-section and extends toward the fourth surface 114. In this embodiment, the extension 1322 is a long, arc-shaped plate extending from the outer end of the connecting portion 1321 toward the fourth surface 114.

[0051] Figure 2 In the illustrated embodiment, the extension 1322 is a long, arc-shaped plate that convex outwards. For Figure 2 In the illustrated embodiment, the outer edge of the projection of the second mounting portion 132 on the photovoltaic module 20 refers to the projection of the outermost protruding end of the elongated arc-shaped plate onto the photovoltaic module 20. It should be noted that the extension portion 1322, when curved, is not limited to... Figure 2The embodiment shown can adjust parameters such as bending radius and curvature according to design requirements.

[0052] In another alternative embodiment, such as Figure 3 As shown, the extension 1322 has a rectangular cross-section and extends in a direction parallel to the fourth surface 114. In this embodiment, the extension 1322 is a flat plate extending parallel to the fourth surface 114 from the outer end of the connecting portion 1321.

[0053] Figure 3 In the illustrated embodiment, the extension 1322 is a flat plate perpendicular to the connecting portion 1321 and parallel to the fourth surface 114. For Figure 3 In the illustrated embodiment, the outer edge of the projection of the second mounting portion 132 onto the photovoltaic module 20 refers to the projection of the extension portion 1322 onto the photovoltaic module 20 on the outer surface of the frame 11 in the width direction. It should be noted that the extension portion 1322, when it is a flat plate, is not limited to... Figure 3 The embodiment shown can adjust the angle between the extension 1322 and the connecting part 1321, i.e. the bending angle of the extension 1322, according to design requirements.

[0054] As can be seen from the above, the outer edge of the projection of the second mounting part 132 on the photovoltaic module 20 refers to the projection formed on the photovoltaic module 20 by the outer side of the extension part 1322. Of course, the extension part 1322 is not limited to curved panels, flat panels, etc., and can be designed into the required shape according to the needs. In short, the projection formed on the photovoltaic module 20 by the outer side of the extension part 1322 does not overlap with the battery 21 in the photovoltaic module 20.

[0055] Please see Figures 2 to 4 The extension 1322 is spaced apart from the first mounting portion 131.

[0056] In this embodiment, the gap between the extension 1322 and the first mounting portion 131 is L3. Alternatively, there may be no gap between the extension 1322 and the first mounting portion 131, i.e., L3 = 0, further increasing the connection stability between the first mounting portion 131 and the second mounting portion 132 and improving the torsional resistance of the frame 10. Alternatively, a gap may exist between the extension 1322 and the first mounting portion 131, saving material costs while ensuring good torsional resistance of the frame.

[0057] It should be understood that the frame 10 is a sheet metal part, and the extension 1322 can be made by a curling process. Preferably, there is a gap between the extension 1322 and the first mounting part 131 to facilitate the curling process. It is understood that the curled or bent extension 1322 can ensure its bending strength.

[0058] As described above, the second mounting section 132 employs a combination of straight and curved plate segments, ensuring both bending resistance and torsional strength of the frame. This results in the photovoltaic mounting structure 100 using the frame 10 possessing superior structural strength and reliability after assembly.

[0059] Figure 5 This is a side view of a frame 10 provided according to one embodiment of the present application from a certain perspective. In some optional embodiments, the frame 10 further includes a limiting portion 12 disposed on the second surface 112, the limiting portion 12 forming the mounting slot E with the second surface 112 and including a first limiting portion 121 extending perpendicularly from the second surface 112, and a second limiting portion 122 extending from the end of the first limiting portion 121 in a direction parallel to the second surface 112.

[0060] The sum of the height of the third surface 113 and the height of the first limiting part 121 is B, and the ratio of L1 to B is 0.37 to 0.92.

[0061] In this embodiment, the limiting part 12 is formed by the perpendicularly intersecting first limiting part 121 and second limiting part 122, and cooperates with the second surface 112 to form an mounting slot E that can hold the photovoltaic module 20. The length of the limiting part 12 can be equal to the length of the frame 11.

[0062] In the illustrated embodiment, both the first limiting part 121 and the second limiting part 122 are flat plates, and the outer side of the first limiting part 121 is flush with the third surface 113.

[0063] The sum of the height of the third surface 113 and the height of the first limiting part 121 is B, which is also the height of the frame 10, and the extension length of the first mounting part 131 is L1.

[0064] Furthermore, the sum of the width of the first surface 111 and the width of the first mounting portion 131 is C, which is also the width of the frame 10. In an optional embodiment, 2.5cm ≤ B ≤ 3.5cm, 2.5cm ≤ C ≤ 3.5cm, 1.3cm ≤ L1 ≤ 2.3cm, and the L1 / B ratio is in the range of 0.37-0.92. Additionally, the width of the second limiting portion 122 is A, which is not greater than the width of the second surface 112.

[0065] Furthermore, the width of the connecting portion 1321 along the direction perpendicular to the fourth surface 114 is L4, where 0.5cm ≤ L4 ≤ 1.8cm. (See also...) Figure 4 When the cross-section of the extension 1322 is rectangular, the difference between L2 and L4 is the thickness of the extension 1322.

[0066] In summary, this application provides a frame 10, which has a partitioned design for the mounting portion 13 on the inner side of the frame 10. The first mounting portion 131 retains the original connection hole position, which can be directly matched with the existing support frame, making production convenient. The second mounting portion 132 adopts a rolled edge design with a reserved horizontal section, which ensures the anti-torsion strength after splicing with the support frame while retaining the anti-bending performance.

[0067] In addition, a notch is formed at the rolled edge position, which can prevent its projection on the photovoltaic module 20 from blocking the cell 21 inside the photovoltaic module 20. Moreover, the light reflected from the back side onto the rolled edge surface can be reflected into the module for secondary use.

[0068] Therefore, when the photovoltaic module 20 is a double-glass photovoltaic module, the photovoltaic installation structure 100 with the frame 10 can maximize the utilization of back-side solar radiation, and the bifaciality of the module can be further improved, with a calculated bifaciality gain of 3-5%. Adding to the benefits, the module frame provided in this proposal is compatible with existing photovoltaic bracket installation methods, directly utilizing existing support frames, and even the bolt hole positions do not need to be changed, requiring no additional costs for production.

[0069] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A bezel, comprising: A frame (11), the frame (11) being rectangular, having a first surface (111), a second surface (112) opposite to the first surface (111), a third surface (113), and a fourth surface (114) opposite to the third surface (113); a mounting slot (E) for mounting a photovoltaic module (20) is provided on the outer side of the second surface (112) of the frame (11); the frame (10) further includes a mounting portion (13) extending from the fourth surface (114) of the frame (11), characterized in that: The mounting portion (13) includes a first mounting portion (131) and a second mounting portion (132). Both the first mounting portion (131) and the second mounting portion (132) are connected to the fourth surface (114) and extend in a direction away from the fourth surface (114). The lines of their intersection with the fourth surface (114) are on the same straight line. The extension length of the first mounting portion (131) is L1, and the extension length of the second mounting portion (132) is L2, where L1 > L2.

2. The bezel of claim 1, wherein, The second mounting portion (132) includes a connecting portion (1321) that is perpendicularly connected to the fourth surface (114), and an extension portion (1322) that bends out from the end of the connecting portion (1321).

3. The bezel of claim 2, wherein, The extension (1322) has an arc-shaped cross section and extends toward the fourth surface (114).

4. The bezel of claim 2, wherein, The extension (1322) has a rectangular cross-section and extends in a direction parallel to the fourth surface (114).

5. The bezel of claim 2, wherein, The extension (1322) is spaced apart from the first mounting portion (131).

6. The border according to any one of claims 2 to 5, characterized in that, The width of the connecting part (1321) along the direction perpendicular to the fourth surface (114) is L4, 0.5cm≤L4≤1.8cm.

7. The bezel of claim 1, wherein, The frame (10) further includes a limiting portion (12) disposed on the second surface (112), the limiting portion (12) and the second surface (112) forming the mounting slot (E) and including a first limiting portion (121) extending vertically from the second surface (112), and a second limiting portion (122) extending from the end of the first limiting portion (121) in a direction parallel to the second surface (112); The sum of the height of the third surface (113) and the height of the first limiting part (121) is B, and the ratio of L1 to B is 0.37 to 0.

92.

8. The bezel of claim 7, wherein, 2.5cm≤B≤3.5cm, 1.3cm≤L1≤2.3cm, the sum of the width of the first surface (111) and the width of the first mounting part (131) is C, 2.5cm≤C≤3.5cm.

9. A photovoltaic mounting structure, characterized by, The device includes a photovoltaic module (20) and a frame (10) according to any one of claims 1 to 8, the frame (10) being disposed on opposite sides of the photovoltaic module (20), and the mounting slot (E) of the frame (10) receiving the edge of the photovoltaic module (20).

10. The photovoltaic mounting structure of claim 9, wherein, The outer edge of the projection of the second mounting part on the photovoltaic module (20) is flush with the outer edge of the cell (21) in the photovoltaic module (20).

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