Double-sided photovoltaic module and photovoltaic integrated building with same

Abstract

The utility model relates to the technical field of color photovoltaic modules, and discloses a double-sided photovoltaic module and a photovoltaic integrated building with the same. A double-sided photovoltaic module includes: front glass; the back glass is parallel to the front glass, a photovoltaic piece body is fixedly installed between the front glass and the back glass, and the face, suitable for receiving light, of the photovoltaic piece body faces the front glass; the confluence welding strip is arranged along the edge of the photovoltaic piece body, the confluence welding strip is arranged on the face, facing the front glass, of the photovoltaic piece body or the confluence welding strip is arranged on the face, facing the back glass, of the photovoltaic piece body, and the confluence welding strip and the photovoltaic piece body are consistent in color. The confluence welding strip and the photovoltaic component body are set to be in the same color, and the colors of the double-sided photovoltaic component reflected by the substrate are the same everywhere, so that the colors of the appearance of the photovoltaic component are consistent everywhere. When the double-sided photovoltaic module is combined with a building, the appearance effect of the building after the glass is replaced by the double-sided photovoltaic module can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of colored photovoltaic modules, in particular to a double-sided photovoltaic module and a photovoltaic integrated building having the same. Background Art

[0002] To meet the increasingly demanding demands of the photovoltaic market, while continuously improving the conversion efficiency of photovoltaic modules, the need for a more user-friendly and environmentally friendly appearance has gradually become a focus of market attention. Given the diverse color designs of buildings, matching the color of photovoltaic modules used in buildings with the architecture is a rigid requirement for photovoltaic integrated buildings, such as photovoltaic curtain walls.

[0003] However, existing solar cells are typically available in a single color, typically black, green, or blue. This fails to meet architectural aesthetic requirements in many applications, creating a visually awkward appearance that doesn't match the intended use case. This significantly limits their potential and impacts the user's visual experience. This is especially true for buildings that require a double-sided aesthetic, such as gallery spaces, sunrooms, and carports. Installing solar panels can significantly diminish the aesthetic appeal of these structures, severely impacting the overall experience of visitors. Utility Model Content

[0004] In view of this, the present invention provides a double-sided photovoltaic module and a photovoltaic integrated building having the same, so as to solve the problem that the aesthetic effect of a building is greatly reduced after photovoltaic panels are installed on the building.

[0005] In a first aspect, the present invention provides a bifacial photovoltaic module, comprising:

[0006] front glass;

[0007] The back glass is arranged parallel to the front glass, and a photovoltaic component body is fixedly installed between the front glass and the back glass, with the side of the photovoltaic component body suitable for receiving light facing the front glass;

[0008] The busbar is arranged along the edge of the photovoltaic component body. The busbar is arranged on the side of the photovoltaic component body facing the front glass or the side of the photovoltaic component body facing the back glass. The busbar is the same color as the photovoltaic component body.

[0009] In a double-sided photovoltaic module, both the front glass and the back glass can be made of colored glass, so that both the front and back of the photovoltaic module appear colored. At the same time, by setting the busbar that can be seen through the front glass or the back glass to the same color as the photovoltaic component body, the color of the double-sided photovoltaic module reflected as the substrate is the same everywhere, so that the double-sided photovoltaic module seen by the human eye has the same color everywhere. When the double-sided photovoltaic module provided by this application is combined with a building, the surface color of the building is consistent, which can greatly improve the appearance of buildings with high aesthetic requirements such as visiting corridors, sun rooms, and carports after replacing the glass with double-sided photovoltaic modules. Moreover, when arranging double-sided photovoltaic modules on a building, the front glass and back glass of the double-sided photovoltaic modules in different areas of the building can be different colors according to the actual needs of the building. The front glass and back glass in the same double-sided photovoltaic module can also be different colors to form different patterns, thereby increasing the ornamental value of the building.

[0010] In an optional embodiment, multiple photovoltaic component bodies are arranged at intervals. On two adjacent photovoltaic component bodies, the busbar strip is arranged on the side of the photovoltaic component body facing the front glass on one of the photovoltaic component bodies, and is arranged on the side of the photovoltaic component body facing the back glass on the other photovoltaic component body. The busbar strips on adjacent photovoltaic component bodies are arranged continuously.

[0011] By continuously arranging the busbars, the busbars are used to fill the gaps between adjacent photovoltaic component bodies, so that the gaps between the adjacent photovoltaic component bodies can also form a substrate color that is the same as the photovoltaic component body, avoiding the color difference between the strip-shaped light leakage gaps and other areas in the double-sided photovoltaic module, improving the overall color uniformity of the double-sided photovoltaic module, and improving the overall aesthetics of the double-sided photovoltaic module.

[0012] In an optional embodiment, the front glass includes a first glass body, a coating layer and a first colored glaze layer, the coating layer is arranged on the side of the first glass body facing away from the photovoltaic component body, and the first colored glaze layer is arranged on the side of the first glass body facing the photovoltaic component body.

[0013] By setting a coating layer on the front glass, the coating layer is used to increase the transmittance of light through the front glass, reduce the overall reflectivity of the front glass, and thus improve the photoelectric conversion efficiency of the bifacial photovoltaic module.

[0014] In an optional embodiment, the refractive index of the coating layer is 1.00-1.54.

[0015] The refractive index of air is 1.00029, and the refractive index of the original glass body is 1.54. When the refractive index of the coating layer is selected between 1.00 and 1.54, the overall reflectivity of the front glass will be reduced, and the overall light transmittance of the front glass will be higher.

[0016] In an optional embodiment, a transparent front adhesive film is provided between the front glass and the photovoltaic device body to bond the photovoltaic device body to the front glass, thereby improving the stability of the connection between the front glass and the photovoltaic device body.

[0017] In an optional embodiment, a light-converting agent is added to the front film. The light-converting agent undergoes Stokes shift during the light conversion process, the energy of the absorbed photons will be greater than that of the radiated photons, and the emission spectrum will shift toward a lower energy direction compared to the absorption spectrum. When the light passes through the front film, the ultraviolet light and green light in the light can be converted into red-orange light and / or blue light that is more easily absorbed by the photovoltaic component body, thereby improving the photoelectric conversion efficiency of the double-sided photovoltaic module.

[0018] In one optional embodiment, a backside adhesive film is disposed between the backside glass and the photovoltaic module body, and the color of the backside adhesive film matches the color of the photovoltaic module body. Because the backside of the photovoltaic module body does not need to receive light to generate electricity, the backside adhesive film is configured as a solid opaque structure, and the backside adhesive film is made to match the color of the photovoltaic module body. This ensures that the color of the backside glass, reflected by the substrate formed by the backside adhesive film, is consistent with the color of the front side of the bifacial photovoltaic module, thereby reducing the color difference between the two sides of the photovoltaic module.

[0019] In an optional embodiment, the back glass includes a second glass body and a second colored glaze layer, and the second colored glaze layer is provided on the side of the second glass body facing the photovoltaic device body or the second colored glaze layer is provided on the side of the second glass body facing away from the photovoltaic device body. Since there is no need to generate electricity on the back of the bifacial photovoltaic module and the only purpose is to make the color look beautiful, the back glass does not need to be coated.

[0020] In an optional embodiment, the photovoltaic component body and the busbar are both black, so that the photovoltaic component body can maximize its absorption rate of light. At the same time, the colors of the front glass and back glass reflected by the black substrate can be more obvious, increasing the color intensity of the building wall composed of double-sided photovoltaic modules and improving the aesthetics.

[0021] In a second aspect, the present invention further provides a photovoltaic integrated building having the bifacial photovoltaic modules described in the present invention. Since the photovoltaic integrated building includes bifacial photovoltaic modules, it has the same effects as bifacial photovoltaic modules, and thus will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of a double-sided photovoltaic module according to an embodiment of the present invention.

[0024] Figure 2 This is a schematic structural diagram of a double-sided photovoltaic module according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic structural diagram of a double-sided photovoltaic module according to an embodiment of the present invention.

[0026] Explanation of the accompanying drawings: 1. Front glass; 101. First glass body; 102. Coating layer; 103. First color glaze layer; 2. Front adhesive film; 3. Photovoltaic component body; 4. Busbar; 5. Back adhesive film; 6. Back glass; 601. Second glass body; 602. Second color glaze layer. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0028] The following combination Figures 1 to 3 , describing the embodiments of the present utility model.

[0029] According to an embodiment of the present invention, on the one hand, a double-sided photovoltaic module is provided, such as Figure 1As shown, the photovoltaic module comprises a front glass 1, a back glass 6, and a busbar 4. The front glass 1 and back glass 6 can be tinted glass of any color, such as red, orange, yellow, green, cyan, blue, or purple, or completely transparent glass. The front glass 1 and back glass 6 are arranged parallel to each other, with a photovoltaic module body 3 fixedly mounted between them. The side of the photovoltaic module body 3 suitable for receiving light faces the front glass 1. The busbar 4 is arranged along the edge of the photovoltaic module body 3, either on the side of the photovoltaic module body 3 facing the front glass 1 or on the side of the photovoltaic module body 3 facing the back glass 6. The busbar 4 is the same color as the photovoltaic module body 3. The busbar 4 is electrically connected to the photovoltaic module body 3 via a busbar to channel the current generated by photoelectric conversion in the photovoltaic module body 3 to a storage or power-consuming device outside the photovoltaic module.

[0030] In a double-sided photovoltaic module, both the front glass 1 and the back glass 6 can be made of colored glass, so that both the front and back of the photovoltaic module appear colored. At the same time, by setting the busbar 4 that can be seen through the front glass 1 or the back glass 6 to the same color as the photovoltaic component body 3, the color of the double-sided photovoltaic module reflected as the substrate is the same everywhere, so that the double-sided photovoltaic module seen by the human eye has the same color everywhere. When the double-sided photovoltaic module provided by this application is combined with a building, the surface color of the building is consistent, which can greatly improve the appearance of buildings with high aesthetic requirements such as visiting corridors, sun rooms, and carports after replacing the glass with double-sided photovoltaic modules. Moreover, when arranging double-sided photovoltaic modules on a building, the front glass 1 and the back glass 6 in the double-sided photovoltaic modules in different areas of the building can be made of different colors according to the actual needs of the building. The front glass 1 and the back glass 6 in the same double-sided photovoltaic module can also be made of different colors to form different patterns, thereby increasing the ornamental value of the building.

[0031] In one embodiment, multiple photovoltaic component bodies 3 are arranged at intervals. In two adjacent photovoltaic component bodies 3, the busbar soldering strip 4 on one photovoltaic component body 3 is arranged on the side of the photovoltaic component body 3 facing the front glass 1, and the busbar soldering strip 4 on the other photovoltaic component body 3 is arranged on the side of the photovoltaic component body 3 facing the back glass 6. The busbar soldering strips 4 on adjacent photovoltaic component bodies 3 are continuously arranged so that the busbar soldering strips 4 cover the gaps between adjacent photovoltaic component bodies 3.

[0032] By continuously arranging the busbar soldering strips 4 and using the busbar soldering strips 4 to fill the gaps between adjacent photovoltaic component bodies 3, the busbar soldering strips 4 in the gaps between adjacent photovoltaic component bodies 3 can also form a substrate color that is the same as the photovoltaic component body 3, avoiding the color difference between the strip-shaped light leakage gaps and other areas in the double-sided photovoltaic module, improving the overall color uniformity of the double-sided photovoltaic module, and improving the overall aesthetics of the double-sided photovoltaic module.

[0033] In one embodiment, Figure 2 As shown, the front glass 1 includes a first glass body 101, a coating layer 102, and a first colored glaze layer 103. The coating layer 102 is provided on the side of the first glass body 101 facing away from the photovoltaic device body 3, and the first colored glaze layer 103 is provided on the side of the first glass body 101 facing the photovoltaic device body 3. By providing the coating layer 102 on the front glass 1, the coating layer 102 increases the transmittance of light passing through the front glass 1, reduces the overall reflectivity of the front glass 1, and thereby improves the photoelectric conversion efficiency of the bifacial photovoltaic module.

[0034] Specifically, the refractive index of the coating layer 102 is between 1.00 and 1.54. The refractive index of air is 1.00029, and the refractive index of the first glass body 101 is 1.54. When the refractive index of the coating layer 102 is selected to be between 1.00 and 1.54, the overall reflectivity of the front glass 1 is reduced, and the overall light transmittance of the front glass 1 is increased. In some other embodiments, to reduce the production cost of the front glass 1, the coating layer 102 may not be provided.

[0035] In one embodiment, a transparent front adhesive film 2 is disposed between the front glass 1 and the photovoltaic device body 3. The front adhesive film 2 is made of one or more of ethylene and α-olefin copolymers, ethylene-vinyl acetate copolymers, and polyvinyl butyral. The front adhesive film 2 is used to bond the photovoltaic device body 3 to the front glass 1, thereby improving the stability of the connection between the front glass 1 and the photovoltaic device body 3.

[0036] Furthermore, a light-converting agent is added to the front adhesive film 2. The light-converting agent undergoes Stokes shift during the light conversion process. The energy of the absorbed photons will be greater than that of the radiated photons, and the emission spectrum will shift toward a lower energy direction compared to the absorption spectrum. When the light passes through the front adhesive film 2, the ultraviolet light and green light in the light can be converted into red-orange light and / or blue light that is more easily absorbed by the photovoltaic component body 3, thereby improving the photoelectric conversion efficiency of the double-sided photovoltaic module.

[0037] In one embodiment, a backside adhesive film 5 is disposed between the backside glass 6 and the photovoltaic device body 3. The color of the backside adhesive film 5 is consistent with the color of the photovoltaic device body 3. Since there is no need to generate electricity on the backside of the bifacial photovoltaic module, the backside adhesive film 5 is a black film selected from the group consisting of an epoxy resin film, a black polyvinyl butyral film, a black ethylene-vinyl acetate copolymer film, and a black polyolefin elastomer film. Since the backside of the photovoltaic device body 3 does not need to receive light to generate electricity, the backside adhesive film 5 is configured as a solid-color opaque structure, and the backside adhesive film 5 is consistent in color with the photovoltaic device body 3. This ensures that the color of the backside glass 6, reflected by the substrate formed by the backside adhesive film 5, is consistent with the color of the front side of the bifacial photovoltaic module, thereby reducing the color difference between the two sides of the photovoltaic module.

[0038] In one embodiment, the back colored glass can be made of colored glazed rolled glass or float glass, such as Figure 3 As shown, the back glass 6 includes a second glass body 601 and a second colored glaze layer 602. The second colored glaze layer 602 is provided on the side of the second glass body 601 facing the photovoltaic device body 3 or on the side of the second glass body 601 facing away from the photovoltaic device body 3. Since there is no need to generate electricity on the back of the bifacial photovoltaic module and only the color is aesthetically pleasing, the back glass 6 does not require coating, and there is no need to add long-wavelength highly reflective materials to the colored glaze ink.

[0039] In one embodiment, the photovoltaic component body 3 and the busbar ribbon 4 are both black, so that the photovoltaic component body 3 can maximize the absorption rate of light. At the same time, the colors of the front glass 1 and the back glass 6 reflected by the black substrate can be more obvious, increasing the color intensity of the building wall composed of double-sided photovoltaic modules and improving the aesthetics.

[0040] According to another embodiment of the present invention, a photovoltaic integrated building is provided, comprising the bifacial photovoltaic modules described herein. The photovoltaic integrated building can be a gallery, sunroom, carport, or the exterior wall structure of a large building such as a science and technology museum, museum, gymnasium, office building, or laboratory building. Because the photovoltaic integrated building includes bifacial photovoltaic modules, it has the same benefits as bifacial photovoltaic modules and will not be further described here.

[0041] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A double-sided photovoltaic module, characterized in that: include: Front glass (1); A back glass (6) is arranged parallel to the front glass (1), a photovoltaic component body (3) is fixedly installed between the front glass (1) and the back glass (6), and a side of the photovoltaic component body (3) suitable for receiving light is arranged toward the front glass (1); A busbar (4) is provided along the edge of the photovoltaic component body (3); the busbar (4) is provided on the side of the photovoltaic component body (3) facing the front glass (1) or the busbar (4) is provided on the side of the photovoltaic component body (3) facing the back glass (6); the busbar (4) is the same color as the photovoltaic component body (3).

2. The double-sided photovoltaic module according to claim 1, characterized in that: The photovoltaic component body (3) is provided with a plurality of them at intervals. On two adjacent photovoltaic component bodies (3), the busbar (4) is provided on one of the photovoltaic component bodies (3) on the side of the photovoltaic component body (3) facing the front glass (1), and on the other photovoltaic component body (3) on the side of the photovoltaic component body (3) facing the back glass (6). The busbars (4) on adjacent photovoltaic component bodies (3) are provided continuously.

3. The double-sided photovoltaic module according to claim 1 or 2, characterized in that: The front glass (1) comprises a first glass body (101), a coating layer (102) and a first colored glaze layer (103); the coating layer (102) is provided on a side of the first glass body (101) facing away from the photovoltaic component body (3); and the first colored glaze layer (103) is provided on a side of the first glass body (101) facing toward the photovoltaic component body (3).

4. The double-sided photovoltaic module according to claim 3, characterized in that: The optical refractive index of the coating layer (102) is 1.00-1.

54.

5. The double-sided photovoltaic module according to claim 1 or 2, characterized in that: A front adhesive film (2) is provided between the front glass (1) and the photovoltaic component body (3), and the front adhesive film (2) is made of a transparent material.

6. The double-sided photovoltaic module according to claim 5, characterized in that: A light-converting agent is added to the front adhesive film (2).

7. The double-sided photovoltaic module according to claim 1 or 2, characterized in that: A back adhesive film (5) is provided between the back glass (6) and the photovoltaic component body (3), and the color of the back adhesive film (5) is consistent with the color of the photovoltaic component body (3).

8. The double-sided photovoltaic module according to claim 1 or 2, characterized in that: The back glass (6) comprises a second glass body (601) and a second colored glaze layer (602), wherein the second colored glaze layer (602) is arranged on a side of the second glass body (601) facing the photovoltaic device body (3) or the second colored glaze layer (602) is arranged on a side of the second glass body (601) facing away from the photovoltaic device body (3).

9. The double-sided photovoltaic module according to claim 1 or 2, characterized in that: The photovoltaic component body (3) and the busbar (4) are both black.

10. A photovoltaic integrated building, characterized in that: A double-sided photovoltaic module according to any one of claims 1 to 9.

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