Support assembly for supporting photovoltaic assembly and photovoltaic system

Abstract

The utility model relates to the field of photovoltaic technology, particularly provides a support assembly for supporting a photovoltaic assembly and a photovoltaic system, and aims to solve the problem that the existing photovoltaic assembly is easy to explode or crack in a working environment. The utility model provides a support assembly used for supporting a photovoltaic assembly, comprising: a support body, a gap being arranged between a back support member of the photovoltaic assembly and the support body in an installation state; and at least one part of the buffer piece is arranged in the gap. According to the utility model, through the arrangement of the buffer member, the deformation quantity of the photovoltaic assembly after being loaded can be reduced, and the probability of plate explosion or subfissure of the photovoltaic assembly is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and specifically provides a bracket assembly for supporting photovoltaic components and a photovoltaic system. Background Art

[0002] Photovoltaic power generation is a technology that converts solar energy into electricity. Its core component is the solar panel, also known as a photovoltaic module. The main components of a photovoltaic module include photovoltaic glass, EVA (polyethylene vinyl acetate) film, solar cells, and backing support. During actual use, photovoltaic modules are subject to certain stresses due to external factors such as wind and snow loads. This can cause the glass to break or crack, thereby affecting the normal operation of the photovoltaic module.

[0003] Therefore, a new bracket assembly is needed in the art to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the above technical problem, that is, to solve the problem that the existing photovoltaic components are prone to explosion or hidden cracks in the working environment.

[0005] In a first aspect, the present invention provides a bracket assembly for supporting a photovoltaic module, the bracket assembly comprising:

[0006] The bracket body has a gap between the back support of the photovoltaic module and the bracket body in the installed state;

[0007] At least one buffer member is provided, at least a portion of which is disposed in the gap.

[0008] In some feasible embodiments of the above-mentioned bracket assembly for supporting photovoltaic components, the buffer member includes a first surface and a second surface opposite to each other. In the installed state, the first surface abuts the surface of the back support member, and the second surface abuts the surface of the bracket body.

[0009] In some feasible implementations of the aforementioned bracket assembly for supporting photovoltaic components, the buffer member is transparent.

[0010] In some feasible implementations of the above-mentioned bracket assembly for supporting photovoltaic modules, the buffer member is made of polymethyl methacrylate or polycarbonate.

[0011] In some feasible implementations of the above-mentioned bracket assembly for supporting photovoltaic components, the buffer member is a sheet-like structure.

[0012] In some feasible embodiments of the above-mentioned bracket assembly for supporting photovoltaic modules, the outline of the buffer member is a hollow or non-hollow circle; or

[0013] The outline of the buffer member is a hollow or non-hollow polygon; or

[0014] The outline of the buffer member is a hollow or non-hollow oval; or

[0015] The outline of the buffer is snowflake-shaped.

[0016] In some feasible implementations of the aforementioned bracket assembly for supporting a photovoltaic assembly, the first surface of the buffer component is bonded to the back support component.

[0017] In some feasible embodiments of the above-mentioned bracket assembly for supporting photovoltaic components, there are multiple buffer members, and the multiple buffer members are arranged at intervals along the width direction of the back support member.

[0018] In some feasible implementations of the aforementioned support assembly for supporting a photovoltaic assembly, the thickness of the buffer member is less than or equal to the size of the gap.

[0019] In some feasible embodiments of the above-mentioned bracket assembly for supporting photovoltaic modules, the width of the back support member is set to L, the buffer member is a rectangular sheet structure, and the length of the buffer member is greater than or equal to 1L / 2.

[0020] In some feasible embodiments of the above-mentioned bracket assembly for supporting photovoltaic components, the back support member is a glass plate.

[0021] In a second aspect, the present invention further provides a photovoltaic system, which includes a bracket assembly for supporting photovoltaic components as described in any of the aforementioned technical solutions.

[0022] The bracket assembly provided by the present invention can reduce the deformation of the photovoltaic assembly by arranging a buffer part in the gap between the bracket body and the photovoltaic assembly, thereby reducing the probability of hidden cracks and panel explosion caused by the positive pressure exerted by the environment on the existing photovoltaic assembly, thereby increasing the life of the photovoltaic assembly and reducing the maintenance cost of the photovoltaic system.

[0023] It will be understood by those skilled in the art that, since the photovoltaic system provided by the present invention is configured with the aforementioned bracket assembly, it has all the technical effects that can be obtained by the aforementioned bracket assembly, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0025] Figure 1 A top view of the photovoltaic assembly and the bracket assembly provided in an embodiment of the present utility model in an assembled state;

[0026] Figure 2 A bottom view of the photovoltaic assembly and the bracket assembly provided in an embodiment of the present utility model in an assembled state;

[0027] Figure 3 An isometric view of the photovoltaic assembly and the bracket assembly provided in an embodiment of the present utility model in an assembled state;

[0028] Figure 4 The second embodiment of the buffer provided by the embodiment of the utility model;

[0029] Figure 5 The third embodiment of the buffer provided by the embodiment of the present utility model;

[0030] Figure 6 Schematic diagram of stress distribution of a glass sheet in the prior art when no buffer is provided;

[0031] Figure 7 Schematic diagram of the total deformation of the glass sheet when no buffer is provided in the prior art;

[0032] Figure 8 Schematic diagram of stress distribution of a glass plate in an embodiment of the present invention;

[0033] Figure 9 Schematic diagram of the total deformation of the glass plate in the embodiment of the present invention.

[0034] List of reference numerals:

[0035] 1. Bracket assembly; 11. Bracket body; 12. Connector; 13. Buffer; 2. Photovoltaic module; 21. Photovoltaic glass; 22. Frame; 23. Back support. DETAILED DESCRIPTION

[0036] The following describes preferred embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are intended only to illustrate the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may adjust these embodiments as needed to suit specific applications.

[0037] In order to better illustrate the present invention, numerous specific details are provided in the following detailed description. It should be understood by those skilled in the art that the present invention can also be implemented without certain specific details.

[0038] In the description of this utility model, terms such as "upper," "lower," "inner," "outer," "front," "back," "left," and "right" indicating directions or positional relationships are based on the directions or positional relationships shown in the figures. This is for ease of description only and does not indicate or imply that the device to be protected must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, the orientations described in the following embodiments should not be construed as limitations on this utility model. Furthermore, ordinal numbers such as "first" and "second" are used for convenience only and are not intended to indicate or imply relative importance.

[0039] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installation" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] Research has found that the main cause of photovoltaic module explosion (i.e., glass panel bursting) and hidden cracks (micro cracks appearing on the glass panel) is the positive pressure from mechanical stress. This positive pressure is usually directly applied to the surface of the photovoltaic module by natural factors such as wind load, snow accumulation, and rain erosion. There is a close correlation between the magnitude of the positive pressure and the deformation of the glass panel: when the photovoltaic module is subjected to positive pressure, the degree of deformation of the glass panel will directly affect the distribution and concentration of stress. Specifically, if the deformation of the glass panel exceeds the threshold of the deformation it can withstand, it will cause the stress to concentrate sharply in the local area, which will in turn cause hidden cracks in the glass panel, and even in some extreme cases, it may directly lead to the bursting of the glass panel. Therefore, in the design, installation and maintenance of photovoltaic modules, the impact of positive pressure on the glass panel must be fully considered and effectively alleviated to ensure the stable operation and long-term reliability of the photovoltaic system.

[0041] The present invention provides a bracket assembly that can reduce the probability of photovoltaic module explosion or hidden cracks. The structure of the bracket assembly provided by the embodiment of the present invention is described below with reference to the accompanying drawings.

[0042] like Figures 1 to 3As shown in , before describing the support assembly 1, the structure of the photovoltaic assembly 2 is briefly described first. The photovoltaic assembly 2 in the embodiment of the present invention includes photovoltaic glass 21, battery cells, and back support 23 arranged in sequence. The battery cells are encapsulated between the photovoltaic glass 21 and the back support 23 by an encapsulation material (EVA film), which plays a fixing and sealing role, effectively preventing the intrusion of harmful substances such as moisture and dust. The edges of the encapsulated structure are further reinforced and protected by a frame 22, and the frame 22 is also used to connect with the support assembly 1.

[0043] Specifically, photovoltaic glass 21, also known as photoelectric glass, is a tempered glass that covers the solar cells to protect them. Photovoltaic glass 21 has excellent light transmittance and high hardness, making it suitable for harsh weather conditions and large temperature swings between day and night. Photovoltaic glass 21 can also be coated to increase light transmittance, enabling the solar cells to generate more electricity.

[0044] The cell is the heart of a photovoltaic module, responsible for converting solar energy into electricity. Cells are typically made of materials such as polycrystalline silicon, monocrystalline silicon, gallium arsenide, and copper indium gallium selenide, with polycrystalline silicon and monocrystalline silicon being the most common.

[0045] The back support 23 is located on the back of the photovoltaic module 2, and plays a role in protecting the battery cells, preventing the battery from being deformed by pressure, and preventing the battery from losing adhesive fixation. The back support 23 is usually made of organic polymer materials such as TPT (Tedlar Polyester Tedlar) or TPE (Tedlar / PET / EVA). This type of organic polymer material has excellent properties such as resistance to high and low temperatures, resistance to ultraviolet radiation, resistance to environmental aging, and water vapor barrier. TPT is a composite solar cell back film, usually composed of three layers of materials. Its core is that polyvinyl fluoride is used as the fluorine material layer on both sides, and the middle is PET (Polyethylene Terephthalate, polyethylene terephthalate) substrate. These three layers of materials are tightly compounded together by adhesive. TPE (Tedlar / PET / EVA) is also a photovoltaic backboard material composed of a sandwich technology. Unlike TPT, the EVA (Ethylene Vinyl Acetate Copolymer) layer in TPE is a colloidal material with excellent light transmittance. This allows the TPE backsheet to maintain excellent waterproofness and battery airtightness while also offering enhanced light transmittance. When the back support 23 is made of this polymer material, the resulting photovoltaic module 2 is a single-glass photovoltaic module.

[0046] In addition, there are double-glass photovoltaic modules. Double-glass photovoltaic modules refer to modules in which the back support 23 uses tempered glass as a support for the battery panel and photovoltaic glass 21. Double-glass photovoltaic modules have better light transmittance and higher power generation efficiency.

[0047] It should be noted that the embodiments of the present invention are described using a double-glass photovoltaic module as an example. It is understood that the technical solution of the present invention is also applicable to a single-glass photovoltaic module, which can reduce the probability of explosion or hidden cracks in the photovoltaic glass 21.

[0048] like Figures 1 to 3 As shown in , the support assembly 1 provided by the present invention for supporting the photovoltaic assembly 2 includes a support body 11 , a connector 12 and a buffer 13 .

[0049] Specifically, the support body 11 in this embodiment includes a plurality of support beams arranged at intervals, and a single support beam is a long strip of channel steel structure. Of course, steel structures with other cross-sectional shapes can also be used. Usually, a photovoltaic module 2 is supported by two support beams, and there is a certain distance between the wide side of the photovoltaic module 2 and the support beam. Figure 3 As shown in FIG, the frame 22 of the photovoltaic module 2 is connected to the support beam via connectors 12. Because the frame 22 wraps around the edges of the photovoltaic module 2 and the back support 23, there is a gap between the back support 23 and the support beam after installation, preventing full contact. As a result, when the photovoltaic module 2 is subjected to wind loads, snow loads, and other forces during operation, it will experience significant deformation, which can easily lead to panel bursting or hidden cracks.

[0050] Based on this, the embodiment of the present invention adds a buffer component 13 to the bracket assembly 1, and places the buffer component 13 in the gap between the back support component 23 and the support beam, so as to play a buffering role during the deformation of the photovoltaic component 2, thereby achieving the purpose of reducing the deformation amount of the photovoltaic component 2, and thereby reducing the probability of bursting or hidden cracks.

[0051] Specifically, Figure 2 The first embodiment of the buffer 13 provided in this embodiment is shown. This buffer 13 is made of polymethyl methacrylate (PMMA), a high molecular weight polymer also known as acrylic or organic glass. It is highly transparent, with a light transmittance of 90% to 92%, and casts virtually no shadows on components. It also has high mechanical strength, with tensile and impact resistance 7 to 18 times greater than that of ordinary glass. Furthermore, it exhibits good stability under ultraviolet light.

[0052] It should be noted that because the photovoltaic module 2 operates outdoors and requires light transmittance, the material selection for the buffer 13 must consider its light transmittance, strength, and stability. In addition to PMMA, the buffer 13 can also be made of polycarbonate (PC). It is understood that with the development of material technology, the material of the buffer 13 is not limited to the materials in the above examples.

[0053] In this embodiment, the buffer 13 has a rectangular outline and a sheet-like structure. The outline here includes an inner outline and an outer outline. The outer outline refers to the outermost boundary of an object, while the inner outline refers to the inner area surrounded by the outer outline and having a specific shape or structure.

[0054] The thickness of the buffer 13 is equal to the size of the gap. Specifically, the buffer 13 includes a first surface and a second surface facing each other. The first surface is the surface of the buffer 13 facing the back support 23, and the second surface is the surface of the buffer 13 facing the support beam. In the installed state, the first surface of the buffer 13 abuts the surface of the back support 23, and the second surface abuts the surface of the support beam. Furthermore, the first surface of the buffer 13 and the back support 23 are abutted by gluing. Specifically, the type of glue used can be silicone, super glue, quick-drying glue, etc., and the thickness of the glue is preferably about 1 mm.

[0055] Further, if Figure 2 As shown in , the width of the back support member 23 is set to L, the buffer member 13 is a rectangular sheet structure, and the length dimension of the buffer member 13 is greater than or equal to 1L / 2. The width of the buffer member 13 is maintained within the width range of 240 mm and is symmetrically arranged relative to the support beam. The number of buffer members 13 on a single support beam can be configured based on the principle that the total coverage area is ≥ 240*0.5L. Specifically, a single buffer member 13 or multiple buffer members 13 arranged at intervals can be used. The shape of the buffer member 13 can be square, circular, elliptical, etc. In addition, the thickness of the buffer member 13 in this embodiment is 24.8 mm, which is determined based on factors such as the structure of the frame 22 of the photovoltaic module 2. It can be understood that the thickness value of the buffer member 13 may also be other values, which are specifically determined according to the gap formed after the photovoltaic module 2 and the support beam are connected.

[0056] In order to verify the effect of the buffer member 13 in the present invention, Figure 2 The structure shown in FIG is used as the simulation basis, and finite element simulation is performed for the case where the buffer member 13 is not provided and the case where the buffer member 13 is provided. Specifically, Figures 6 to 9 As shown in FIG, the material of the buffer 13 is PMMA and the size is as follows: Figure 2 As mentioned in the simulation, the load applied is 5400Pa. Compare the stress difference and deformation difference before and after the structural change. Figure 6 and Figure 7 As shown in FIG, when the buffer member 13 is not provided, the structural stress of the model is 135.3 MPa and the maximum deformation at the middle position is 70.7 mm. Figure 8 and Figure 9 As shown in Figure 1, after installing the buffer 13, the structural stress of the model was 110.25 MPa, a stress reduction of 18.5%, and the maximum deformation at the center was 41.165 mm, a deformation reduction of 42%. By comparison, it can be found that after installing the buffer 13 of the utility model, the deformation of the glass is greatly reduced, thereby effectively reducing the probability of hidden cracks or explosion of the glass.

[0057] The outline of the buffer 13 in the above example is a non-hollow polygon (quadrilateral), and the outline of the buffer 13 can also be a hollow or non-hollow circle, a hollow or non-hollow ellipse, a snowflake shape, etc. For example, Figure 4 As shown in Figure 4 The outline of the buffer member 13 shown is a hollow circle, which is obtained by opening regular-shaped holes on a circular sheet structure. Figure 5 As shown in Figure 5 The illustrated buffer element 13 has a snowflake-shaped profile having a plurality of radially arranged ribs.

[0058] It is understood that the outline of the buffer 13 is not limited to the above examples. When the outline is a polygon, it is not limited to a quadrilateral, but can also be a hexagon, an octagon, etc. In addition, it can be with or without a hollow pattern. The same is true for the ellipse, which can be with or without a hollow pattern. The same is true for the circle. Figure 4 Shown is a hollow pattern, it can also be without a hollow pattern. In addition, the hollow pattern can be regular or irregular.

[0059] Furthermore, the number of the buffer members 13 can be multiple, and the multiple buffer members 13 are spaced apart along the width direction of the back support member 23. Figure 2 As shown, you can Figure 2 The buffer members 13 are separated and arranged at intervals along the extending direction of the support beam.

[0060] In addition, in addition to being equal to the size of the gap, the thickness of the buffer 13 can also be slightly smaller than the size of the gap. During installation, the buffer 13 is adhered to the back support 23 by gluing, and the second surface of the buffer 13 is not fixed to the support beam. This can still reduce the degree of deformation of the photovoltaic module 2, thereby reducing the chance of hidden cracks or explosions.

[0061] In addition, the utility model also provides a photovoltaic system, which includes a plurality of the above-mentioned photovoltaic modules and bracket modules, and the bracket modules are interconnected to form a bracket network, so as to realize synchronous operation of photovoltaic modules over a large area.

[0062] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A bracket assembly for supporting a photovoltaic module, characterized in that: The bracket assembly includes: The bracket body has a gap between the back support of the photovoltaic module and the bracket body in the installed state; at least one buffer member, at least a portion of the buffer member being disposed in the gap; The buffer member includes a first surface and a second surface facing away from each other. In the installed state, the first surface abuts against the surface of the back support member, and the second surface abuts against the surface of the bracket body.

2. The bracket assembly for supporting a photovoltaic module according to claim 1, characterized in that: The buffer member is transparent.

3. The bracket assembly for supporting a photovoltaic module according to claim 1, characterized in that: The material of the buffer component is polymethyl methacrylate or polycarbonate.

4. The bracket assembly for supporting a photovoltaic module according to claim 1, characterized in that: The buffer component is a sheet-like structure.

5. The bracket assembly for supporting a photovoltaic assembly according to claim 4, characterized in that: The outline of the buffer member is a hollow or non-hollow circle; or The outline of the buffer member is a hollow or non-hollow polygon; or The outline of the buffer member is a hollow or non-hollow oval; or The outline of the buffer is snowflake-shaped.

6. The bracket assembly for supporting a photovoltaic assembly according to claim 1, characterized in that: The first surface of the buffer component is bonded to the back support component.

7. The bracket assembly for supporting a photovoltaic assembly according to claim 1, characterized in that: There are a plurality of buffer members, and the plurality of buffer members are arranged at intervals along the width direction of the back support member.

8. The bracket assembly for supporting a photovoltaic assembly according to claim 1, characterized in that: The thickness of the buffer member is smaller than or equal to the size of the gap.

9. The bracket assembly for supporting a photovoltaic assembly according to claim 1, characterized in that: The width of the back support member is set to L, the buffer member is a rectangular sheet structure, and the length of the buffer member is greater than or equal to 1L / 2.

10. The bracket assembly for supporting a photovoltaic assembly according to any one of claims 1 to 9, characterized in that: The back support member is a glass plate.

11. A photovoltaic system, characterized in that: The photovoltaic system comprises the support assembly for supporting a photovoltaic assembly according to any one of claims 1 to 10.

Images