Photovoltaic power generation structure

Abstract

The utility model relates to a photovoltaic power generation structure, which comprises a photovoltaic power generation unit and a metal plate, and is characterized in that the photovoltaic power generation unit is provided with a first bonding area and a second bonding area, and the first bonding area and the second bonding area are provided with connecting glue layers to bond the metal plate and the photovoltaic power generation unit. The arrangement of the first bonding area and the second bonding area enables the connection positions of the metal plate and the photovoltaic power generation unit to be distributed more uniformly and comprehensively, so that the connection effect of the metal plate and the photovoltaic power generation unit can be improved, and the connection adhesive layer can be bonded in a normal temperature environment. Therefore, the adverse effects of warping, bending and the like caused by high-temperature laminating and bonding can be avoided; and the connecting adhesive layer has good elastic deformation capability and can absorb deformation difference generated due to different material attributes, so that shear stress generated between the metal plate and the photovoltaic power generation unit is greatly reduced, the structural bearing capability of the metal plate and the photovoltaic power generation unit is enhanced, and the use reliability of the photovoltaic power generation structure is enhanced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to photovoltaic power generation structures. Background Art

[0002] In recent years, amidst the green and low-carbon transition in China and globally, the construction industry has become a key area for implementing the "carbon peak and carbon neutrality" policy. Promoting the use of green building materials and developing green buildings are the optimal solutions for achieving sustainability in both construction and the carbon cycle. With the application of BIPV (Building Integrated Photovoltaics), limited rooftop resources are constraining the development of green buildings. Therefore, integrating photovoltaic power generation units with building walls, which have wider application areas, has become a key development direction for green buildings.

[0003] The photovoltaic power generation unit is combined with the building wall to replace the traditional building material decorative panels. It not only needs to meet the performance requirements of the photovoltaic power generation unit itself, but also needs to meet the architectural functions of the enclosing wall, such as wind pressure resistance, airtightness, transparency and aesthetics.

[0004] In the related art, the photovoltaic power generation unit is mounted on the surface of the building wall. Under the action of long-term wind load, the installation position may produce fatigue effects, affecting the safety of the structure. Utility Model Content

[0005] Based on this, it is necessary to provide a photovoltaic power generation structure to address the safety issues of existing photovoltaic power generation structures.

[0006] A photovoltaic power generation structure, comprising:

[0007] Metal sheets;

[0008] A photovoltaic power generation unit is arranged with the metal plate along the thickness direction of the metal plate; a first bonding area and a second bonding area are provided on a side of the photovoltaic power generation unit facing the metal plate; wherein the first bonding area is distributed along the circumference of the photovoltaic power generation unit, and the second bonding area is parallel to the length direction of the metal plate or the width direction of the metal plate;

[0009] A connecting adhesive layer is provided in the first bonding area and the second bonding area, and the connecting adhesive layer can bond the metal plate and the photovoltaic power generation unit under normal temperature.

[0010] In one embodiment, the first bonding area includes four edges of the photovoltaic power generation unit;

[0011] The second bonding area is located within the first bonding area, and the second bonding area is parallel to the length direction of the metal plate.

[0012] In one embodiment, the second bonding area includes a plurality of second bonding areas, and the plurality of second bonding areas are evenly spaced.

[0013] In one embodiment, there is a gap between the second bonding area and the first bonding area.

[0014] In one embodiment, the connecting adhesive layer includes an adhesive layer, which is provided in the first adhesive region and the second adhesive region, and the adhesive layer can bond the metal plate and the photovoltaic power generation unit at room temperature.

[0015] In one embodiment, the connecting adhesive layer further includes a double-sided adhesive tape, the double-sided adhesive tape is arranged in the first bonding area and the second bonding area, and the adhesive layer abuts against the double-sided adhesive tape.

[0016] In one embodiment, the distribution direction of the adhesive layer and the double-sided tape is perpendicular to the thickness direction; the thickness of the adhesive layer is the same as the thickness of the double-sided tape.

[0017] In one embodiment, the thickness of the adhesive layer is no more than 6 mm.

[0018] In one embodiment, the connecting adhesive layer located in the first bonding area is provided with a notch.

[0019] In one embodiment, the metal plate is provided with an installation groove for installing a junction box.

[0020] The above-mentioned photovoltaic power generation structure includes a photovoltaic power generation unit and a metal plate. The metal plate and the photovoltaic power generation unit are bonded by arranging a first bonding area and a second bonding area on the photovoltaic power generation unit, and arranging a connecting adhesive layer in the first bonding area and the second bonding area. The arrangement of the first bonding area and the second bonding area makes the connection position distribution of the metal plate and the photovoltaic power generation unit more uniform and comprehensive, which not only increases the connection effect of the metal plate and the photovoltaic power generation unit, but also enables the connecting adhesive layer to be bonded at room temperature, thereby avoiding adverse effects such as warping and bending caused by high-temperature lamination bonding; and the connecting adhesive layer has good elastic deformation ability, which can absorb the deformation difference caused by different material properties, greatly reduce the shear stress generated between the metal plate and the photovoltaic power generation unit, enhance the structural bearing capacity of the metal plate and the photovoltaic power generation unit, reduce the deformation possibility of the photovoltaic power generation structure, and enhance the reliability and safety of the photovoltaic power generation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of an exploded view of a photovoltaic power generation structure provided in one embodiment of the present application.

[0022] Figure 2 for Figure 1 The overall schematic diagram of the photovoltaic power generation structure is shown.

[0023] Figure 3 for Figure 2 Schematic diagram of the AA section of the photovoltaic power generation structure shown.

[0024] Figure numbers: 10, photovoltaic power generation structure; 100, metal plate; 110, mounting groove; 200, photovoltaic power generation unit; 210, first bonding area; 220, second bonding area; 300, connecting adhesive layer; 310, adhesive layer; 320, double-sided tape; 330, notch. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does 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 cannot be understood as a limitation on this application.

[0027] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0028] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

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

[0031] BIPV is a technology that integrates photovoltaic power generation units into the structure and appearance of buildings. This technology not only provides renewable energy, but also can be used as part of building materials, reducing the demand for traditional building materials and thus reducing overall construction costs. BIPV components can be designed in various colors, shapes, and textures to suit different architectural design styles. They also help reduce carbon emissions because they use clean solar energy, which can reduce dependence on fossil fuels and help mitigate climate change. Therefore, BIPV is beautiful, practical, and environmentally friendly.

[0032] Existing technologies typically mount photovoltaic power generation units on building walls. Under long-term wind loads, the mounting position can experience fatigue, impacting the structure's safety. Alternatively, photovoltaic power generation units are laminated to metal sheets using a laminator—that is, the two sheets are bonded together using adhesive film. However, due to structural asymmetry, varying thermal expansion properties of the materials, and uneven heating and cooling, significant warping and bending can occur. Furthermore, due to varying material properties, temperature-dependent shear stresses can create between the metal sheet and the photovoltaic unit, leading to the risk of delamination between the metal sheet and the photovoltaic unit, impacting safety and reliability.

[0033] Based on this, an embodiment of the present application provides a photovoltaic power generation structure that can address the above technical issues. The photovoltaic power generation structure provided by an embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0034] See Figures 1 to 3 As shown, the photovoltaic power generation structure 10 provided in one embodiment of the present application includes a photovoltaic power generation unit 200, a metal plate 100 and a connecting adhesive layer 300; the metal plate 100 and the photovoltaic power generation unit 200 are arranged along the thickness direction of the metal plate 100, as shown in FIG. Figure 3 As shown, the thickness direction is indicated by arrow Z; the photovoltaic power generation unit 200 is provided with a first bonding area 210 and a second bonding area 220 on the side facing the metal plate 100; wherein, the first bonding area 210 is distributed along the circumference of the photovoltaic power generation unit 200, and the second bonding area 220 is parallel to the length direction of the metal plate 100 or the width direction of the metal plate 100; the connecting adhesive layer 300 is provided in the first bonding area 210 and the second bonding area 220, and the connecting adhesive layer 300 can bond the metal plate 100 and the photovoltaic power generation unit 200 under normal temperature environment.

[0035] The photovoltaic power generation structure 10 includes a photovoltaic power generation unit 200 and a metal plate 100. The first bonding area 210 and the second bonding area 220 are provided on the photovoltaic power generation unit 200, and a connecting adhesive layer 300 is provided in the first bonding area 210 and the second bonding area 220 to bond the metal plate 100 and the photovoltaic power generation unit 200. The first bonding area 210 and the second bonding area 220 are provided so that the connection position distribution of the metal plate 100 and the photovoltaic power generation unit 200 is more uniform and comprehensive, which can not only increase the connection between the metal plate 100 and the photovoltaic power generation unit 200, but also improve the connection between the metal plate 100 and the photovoltaic power generation unit 200. The connection effect is good, and the connecting adhesive layer 300 can be bonded at room temperature, thereby avoiding adverse effects such as warping and bending caused by high-temperature lamination bonding; and the connecting adhesive layer 300 has good elastic deformation ability, which can absorb the deformation difference caused by different material properties, greatly reduce the shear stress generated between the metal plate 100 and the photovoltaic power generation unit 200, enhance the structural bearing capacity of the metal plate 100 and the photovoltaic power generation unit 200, reduce the deformation possibility of the photovoltaic power generation structure 10, and enhance the reliability and safety of the photovoltaic power generation structure 10.

[0036] Understandably, Figure 1 The photovoltaic power generation unit 200 shown hides the metal grid lines to more clearly illustrate the bonding position of the connecting adhesive layer 300. The photovoltaic power generation unit 200 can be composed of multiple photovoltaic modules connected in series and parallel. The photovoltaic modules can be crystalline silicon solar cells, amorphous silicon heterojunction solar cells, or other tandem solar cells. They can also be thin-film solar cells (amorphous silicon, copper indium gallium selenide, gallium arsenide, cadmium telluride, perovskite, etc.) or solar cells using other technologies. The metal sheet 100 is a common roofing metal sheet material and can be galvanized, galvanized aluminum-zinc, galvanized aluminum-magnesium steel, aluminum, aluminum-magnesium-manganese alloy, or titanium-zinc.

[0037] See Figure 1 and Figure 3 As shown, in one embodiment, the first bonding area 210 includes the four edges of the photovoltaic power generation unit 200, that is, the first bonding area 210 is located at the four edges of the photovoltaic power generation unit 200; the second bonding area 220 is located within the first bonding area 210, and the second bonding area 220 is parallel to the length direction of the metal plate 100. There are multiple second bonding areas 220, and there is a gap between the second bonding area 220 and the first bonding area 210. Specifically, in this example, there are two second bonding areas 220, and the two second bonding areas 220 are symmetrically distributed. Through this arrangement, the bonding positions between the metal plate 100 and the photovoltaic power generation unit 200 are distributed more and more evenly, thereby improving the connection effect between the two.

[0038] See Figure 1and Figure 3 As shown, in one embodiment, the connecting adhesive layer 300 includes an adhesive layer 310, which is disposed in the first adhesive region 210 and the second adhesive region 220. The adhesive layer 310 can bond the metal plate 100 and the photovoltaic power generation unit 200 at room temperature. The adhesive layer 310 can be a silicone structural adhesive, an organic silicon structural adhesive, an epoxy structural adhesive, a polyurethane structural adhesive, or an acrylate structural adhesive.

[0039] See Figure 1 and Figure 3 As shown, in one embodiment, the connecting adhesive layer 300 further includes a double-sided adhesive patch 320, which is disposed in the first bonding area 210 and the second bonding area 220, and the adhesive layer 310 abuts against the double-sided adhesive patch 320. The double-sided adhesive patch 320 can, on the one hand, bond the metal plate 100 to the photovoltaic power generation unit 200, and on the other hand, can also position the adhesive layer 310, facilitating the positioning of the adhesive layer 310 and improving bonding efficiency. The double-sided adhesive patch 320 can specifically include an ethylene-vinyl acetate copolymer (EVA) double-sided adhesive patch 320, a polyethylene (PE) double-sided adhesive patch 320, or a polyurethane (PU) double-sided adhesive patch 320.

[0040] See Figure 3 As shown, in one embodiment, the distribution direction of the adhesive layer 310 and the double-sided tape 320 is perpendicular to the thickness direction; specifically, for the first adhesive region 210 located at the edge, a group of double-sided tape 320 is provided, and the outer side of the double-sided tape 320 is the location for the adhesive layer 310. For the second adhesive region 220, two groups of double-sided tape 320 are provided, and the two groups of EVA double-sided tape 320 are spaced apart, and the gap between them is used to set the adhesive layer 310. The thickness of the adhesive layer 310 is the same as the thickness of the double-sided tape 320. Specifically, the thickness of the adhesive layer 310 and the double-sided tape 320 is no more than 6 mm.

[0041] See Figure 1As shown, in one embodiment, the connecting adhesive layer 300 located in the first bonding area 210 is provided with a notch 330. The provision of the notch 330 facilitates the discharge of condensed fluid or air remaining between the photovoltaic power generation unit 200 and the metal plate 100, thereby ensuring a tight connection between the photovoltaic power generation unit 200 and the metal plate 100. Furthermore, the metal plate 100 is provided with a mounting groove 110 for mounting a junction box.

[0042] Taking the adhesive layer 310 as structural adhesive and the double-sided adhesive tape 320 as EVA double-sided adhesive tape 320 as an example, the assembly process of the photovoltaic power generation structure 10 is as follows: first, prepare the metal plate 100 and the photovoltaic power generation unit 200, and clean the bonding surfaces of the metal plate 100 and the photovoltaic power generation unit 200; then, lay the photovoltaic power generation unit 200 flat with the bonding surface facing up, and paste the EVA double-sided adhesive tape 320 with the same thickness as the structural adhesive on the bonding surface of the photovoltaic power generation unit 200. The bonding positions are shown in the first bonding area 210 and the second bonding area mentioned above. 220; for the first bonding area 210, the outer side of the EVA double-sided tape 320 is the reserved glue groove, and for the second bonding area 220, the gap between the two sets of EVA double-sided tape 320 is the reserved glue groove; then, use mature gluing equipment such as a glue gun to apply structural glue to fill the reserved glue groove; then, the bonding surface of the metal plate 100 is bonded with the structural glue, and the metal plate 100 is aligned with the photovoltaic power generation unit 200 on all sides, and the surface of the metal plate 100 is rolled to make the metal plate 100 and the photovoltaic power generation unit 200 more fully bonded.

[0043] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A photovoltaic power generation structure, characterized in that: The photovoltaic power generation structure includes: Metal plate (100); A photovoltaic power generation unit (200) is arranged along the thickness direction of the metal plate (100) with the metal plate (100); a first bonding area (210) and a second bonding area (220) are provided on a side of the photovoltaic power generation unit (200) facing the metal plate (100); wherein the first bonding area (210) is distributed along the circumference of the photovoltaic power generation unit (200), and the second bonding area (220) is parallel to the length direction of the metal plate (100) or the width direction of the metal plate (100); A connecting adhesive layer (300) is provided in the first bonding area (210) and the second bonding area (220), and the connecting adhesive layer (300) is capable of bonding the metal plate (100) and the photovoltaic power generation unit (200) under normal temperature conditions.

2. The photovoltaic power generation structure according to claim 1, characterized in that: The first bonding area (210) includes four edges of the photovoltaic power generation unit (200); The second bonding area (220) is located within the first bonding area (210), and the second bonding area (220) is parallel to the length direction of the metal plate (100).

3. The photovoltaic power generation structure according to claim 2, characterized in that: The second bonding area (220) includes a plurality of second bonding areas (220), and the plurality of second bonding areas (220) are evenly spaced.

4. The photovoltaic power generation structure according to claim 3, characterized in that: There is a gap between the second bonding area (220) and the first bonding area (210).

5. The photovoltaic power generation structure according to claim 1, characterized in that: The connecting adhesive layer (300) comprises an adhesive layer (310), the adhesive layer (310) being arranged in the first adhesive region (210) and the second adhesive region (220), and the adhesive layer (310) being capable of bonding the metal plate (100) and the photovoltaic power generation unit (200) together under normal temperature conditions.

6. The photovoltaic power generation structure according to claim 5, characterized in that: The connecting adhesive layer (300) further comprises a double-sided adhesive tape (320), wherein the double-sided adhesive tape (320) is arranged in the first bonding area (210) and the second bonding area (220), and the bonding adhesive layer (310) abuts against the double-sided adhesive tape (320).

7. The photovoltaic power generation structure according to claim 6, characterized in that: The distribution directions of the adhesive layer (310) and the double-sided adhesive tape (320) are perpendicular to the thickness direction; and the thickness of the adhesive layer (310) is the same as that of the double-sided adhesive tape (320).

8. The photovoltaic power generation structure according to claim 7, characterized in that: The thickness of the adhesive layer (310) is no more than 6 mm.

9. The photovoltaic power generation structure according to claim 1, characterized in that: The connecting adhesive layer (300) located in the first bonding area (210) is provided with a notch (330).

10. The photovoltaic power generation structure according to claim 1, characterized in that: The metal plate (100) is provided with a mounting groove (110) for mounting a junction box.

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