Building integrated photovoltaic assembly

Abstract

The utility model discloses a building integrated photovoltaic assembly, which comprises a substrate, a reflective layer, a first adhesive film layer, a battery piece layer, a second adhesive film layer and a front plate, the reflective layer, the first adhesive film layer, the battery piece layer, the second adhesive film layer and the front plate are stacked on one side of the substrate, and the first adhesive film layer and the second adhesive film layer are transparent adhesive films. The first adhesive film layer and the second adhesive film layer are transparent adhesive films and can effectively reflect or refract light, and the light reflecting layer is arranged on the substrate and reflects light which enters the assembly through the front face and reaches the substrate, so that the light is reflected to the back face of the battery piece layer, and the back face of the assembly also generates electricity. The whole photovoltaic building integrated assembly is increased, the generating capacity of the whole photovoltaic matrix is improved, the income of users and investors is increased, and the problem that the generating capacity is low due to the fact that the photovoltaic assembly only carries out front power generation in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic solar technology field, specifically, relate to a photovoltaic building integrated assembly. BACKGROUND

[0002] Now solar photovoltaic power generation technology has developed to a mature stage, in the existing photovoltaic power generation system, commercial and carport distributed application scene gradually becomes the mainstream form among them. And one kind of integrated photovoltaic power generation building integrated (Building Integrated PV, called BIPV) assembly, the combination of glass, adhesive film, cell piece, back plate and profiled steel sheet, constitutes integrated BIPV assembly. The component usually uses non-transparent back plate, thereby leading to the market conventional component of this kind is according to the front light of photovoltaic module to generate electricity, does not fully consider the scheme of back power generation. SUMMARY

[0003] The utility model provides a kind of photovoltaic building integrated assembly, to solve the problem of low power generation in related technology that photovoltaic module only carries out front power generation.

[0004] According to an aspect of the utility model, a kind of photovoltaic building integrated assembly is provided, comprising: substrate and the reflective layer, first adhesive film layer, cell piece layer, second adhesive film layer and front plate are stacked on the side of the substrate, wherein the first adhesive film layer and the second adhesive film layer are transparent adhesive film.

[0005] Optionally, the cell piece layer includes a plurality of spaced apart double-sided solar cell pieces.

[0006] Optionally, the double-sided solar cell pieces are arranged along a first direction and a second direction, a first spacing between any adjacent double-sided solar cell pieces in the first direction is 1mm-2mm, a second spacing between any adjacent double-sided solar cell pieces in the second direction is 1.5mm-2.5mm, and the first direction is perpendicular to the second direction.

[0007] Optionally, the first spacing is greater than the second spacing.

[0008] Optionally, adjacent double-sided solar cell pieces are connected by the transparent adhesive film.

[0009] Optionally, the reflective layer reflects wavelengths of 300nm-1100nm.

[0010] Optionally, the substrate includes a metal plate, and the metal plate includes a first protective layer, a metal material layer, a second protective layer and a reflective layer stacked, and the first protective layer is in contact with the reflective layer.

[0011] Optionally, the building integrated photovoltaic assembly further comprises a back plate, the back plate is located between the first adhesive film layer and the cell piece layer, and a third adhesive film layer is arranged between the back plate and the cell piece layer, the third adhesive film layer is a transparent adhesive film.

[0012] Optionally, the front plate and the back plate comprise at least one of a glass substrate and a polymer composite plate.

[0013] Optionally, the transparent adhesive film comprises at least one of a POE adhesive film and an EVA adhesive film.

[0014] Through the technical scheme of the utility model, a building integrated photovoltaic assembly is provided, the first adhesive film layer and the second adhesive film layer in the utility model are transparent adhesive films, can effectively reflect or refract light, and the light that passes through the front surface into the assembly and reaches the substrate is reflected through the arrangement of the light reflecting layer on the substrate, so that the part of light is reflected to the back surface of the cell piece layer, so that the back surface of the assembly also generates electricity. The power generation of the entire BIPV assembly is increased, the power generation of the entire photovoltaic matrix is improved, and the income of users and investors is increased. In the power generation life cycle of the entire BIPV assembly, the recovery period is shorter, and the return rate is higher. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings that form part of the utility model are used to provide further understanding of the utility model, the illustrative embodiments of the utility model and the explanation thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0016] Figure 1 It is a structural schematic view of a building integrated photovoltaic assembly according to the utility model embodiment;

[0017] Figure 2 It is an explosion structural schematic view of another building integrated photovoltaic assembly according to the utility model embodiment;

[0018] Figure 3 It is a cross-sectional structural schematic view of a building integrated photovoltaic assembly according to the utility model embodiment;

[0019] Figure 4 It is a top view structural schematic view of a cell piece layer according to the utility model embodiment;

[0020] Figure 5 It is a schematic view of incident light irradiation on a cell piece layer according to the utility model embodiment;

[0021] Figure 6 It is a cross-sectional schematic view of incident light irradiation on a cell piece layer according to the utility model embodiment;

[0022] Figure 7 is a schematic view of another incident light irradiating on a cell layer according to an embodiment of the present application;

[0023] Figure 8 is a schematic view of a cross-section structure of a building integrated photovoltaic module according to another embodiment of the present application.

[0024] Among the above drawings, the following reference signs are included:

[0025] 1, base; 2, photovoltaic module; 10, base plate; 11, metal plate; 101, first protective layer; 102, metal material layer; 103, second protective layer; 20, reflective layer; 30, first adhesive film layer; 40, cell layer; 401, double-sided solar cell; 402, spacing; 50, second adhesive film layer; 60, front plate; 70, back plate; 80, third adhesive film layer; 90, incident light. DETAILED DESCRIPTION

[0026] It should be noted that the embodiments and features in the present application and the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, products or devices.

[0029] As described in the background section, as Figure 1As shown, the back of the prior art BIPV module includes a substrate 1, and the front of the BIPV module includes a photovoltaic module 2, wherein the BIPV module generates electricity according to the front light of the photovoltaic module 2 located on the front, without fully considering the back electricity generation scheme of the photovoltaic module 2, thereby resulting in low electricity generation of the BIPV module, reducing electricity generation income, and increasing the investment return period of the investment party and the beneficiary party. In order to solve the above technical problems, the utility model provides a kind of BIPV module.

[0030] According to an aspect of the utility model, a kind of BIPV module is provided, as Figure 2 And Figure 3 As shown, wherein, Figure 3 It is the sectional view of BIPV module, above-mentioned module includes substrate 10 and in the one side of substrate 10 laminated setting reflective layer 20, first adhesive film layer 30, cell piece layer 40, second adhesive film layer 50 and front plate 60, wherein, first adhesive film layer 30 and second adhesive film layer 50 are transparent adhesive film. First adhesive film layer 30 and second adhesive film layer 50 in above-mentioned BIPV module are transparent adhesive film, can effectively reflect or refract light, and by substrate set reflective layer 20, the light that reaches substrate 10 by passing through front into module is reflected, to thereby the part light is reflected to the back of cell piece layer 40, to thereby make module back also generate electricity. Increase the power generation of entire BIPV module, improve the power generation of entire photovoltaic matrix, increase the income of user and investor. In the power generation life cycle of entire BIPV module, recovery period is shorter, and return rate is higher.

[0031] In some optional embodiments, as Figure 3 As shown, cell piece layer 40 includes a plurality of spaced apart double-sided solar cell pieces 401, and adjacent double-sided solar cell pieces 401 have a spacing 402.

[0032] Specifically, as Figure 4 As shown in cell piece layer 40, double-sided solar cell pieces 401 are spaced apart, so that adjacent double-sided solar cell pieces 401 have a spacing 402, which can insulate the circuit and avoid short circuit between adjacent double-sided solar cell pieces 401 during welding. At the same time, the spacing can meet the voltage requirement of the BIPV module. The spacing and the power of the BIPV module are positively correlated. The greater the power of the BIPV module, the greater the spacing between the solar cell pieces. In addition, the spacing between adjacent solar cell pieces helps to dissipate heat from the solar cell pieces, avoids reducing the service life of the BIPV module due to overheating of the solar cell pieces, and can increase the aesthetics of the BIPV module.

[0033] The double-sided solar cell piece can generate electricity on the front side and the back side of the cell piece layer. When light irradiates on the building integrated photovoltaic assembly, the light irradiating on the solar cell piece can generate electricity on the front side of the cell piece, but the light irradiating on the gap between the adjacent double-sided solar cell pieces cannot be effectively utilized, thereby causing waste of light source and low power generation of the assembly. The cell piece layer is provided with the double-sided solar cell piece, and the solar cell piece on the back side can generate electricity by the light irradiating on the gap between the cell pieces, thereby improving the power generation of the building integrated photovoltaic assembly.

[0034] Specifically, as shown in Figure 5 , the incident light 90 irradiates on the cell piece layer, and most of the light is absorbed by the front side of the double-sided solar cell piece 401 to be converted into electric energy. As shown in Figure 6 , the incident light 90 irradiating on the gap 402 of the cell piece transmits through the gap 402 to the first adhesive film layer 30, the first adhesive film layer 30 is a transparent adhesive film, the incident light 90 is refracted and transmitted to the light-reflecting layer 20, the light-reflecting layer 20 is arranged on the substrate 10, the light-reflecting layer 20 reflects the incident light 90 to the back side of the double-sided solar cell piece 401, thereby making the back side of the cell piece layer 40 generate electricity, improving the utilization rate of light irradiation of the building integrated photovoltaic assembly, and further improving the power generation of the building integrated photovoltaic assembly.

[0035] In some optional embodiments, as shown in Figure 4 , in the cell piece layer 40, the double-sided solar cell pieces 401 are arranged along the first direction X and the second direction Y, the first gap D x between any adjacent double-sided solar cell pieces 401 in the first direction X is 1mm-2mm, and the second gap D y between any adjacent double-sided solar cell pieces 401 in the second direction Y is 1.5mm-2.5mm.

[0036] Specifically, if the contact area of the cell piece and the light source is too large, the resistance between the cell pieces increases, the heat generation rate of the cell piece rises, thereby shortening the service life of the assembly. The increase of the resistance also causes aging and damage of the cell piece, thereby affecting the performance of the cell piece. In addition, if the gap between the cell pieces is too large, the stress concentration and deformation of the cell piece layer occur, thereby causing cracks and damage of the assembly, and affecting the service life of the assembly. Therefore, the first gap and the second gap are in a suitable range, which can improve the performance of the building integrated photovoltaic assembly, increase the stability and service life of the assembly.

[0037] Further, as shown in Figure 7 , the first gap D x is greater than the second gap D yIn the application process of the building integrated photovoltaic module, the module is used to receive sunlight and convert the light energy of the sunlight into electric energy. Without affecting the service life of the module, the first interval D x and the second interval D y are adjusted so that the first interval D x is greater than the second interval D y , wherein the second direction Y is the moving direction of the incident light 90 of the sun, so that the sunlight can be fully irradiated in the first interval D x , and the side edges of the bifacial solar cell 401 will not block the sunlight from the interval 402 due to the movement of the incident light 90, thereby increasing the contact area of the incident light 90 and the interval 402 with the sunlight, increasing the amount of light passing through the front to the substrate, and further improving the back power generation without affecting the front power generation, thereby improving the overall power generation of the module.

[0038] In some optional embodiments, the adjacent bifacial solar cell pieces are connected by a transparent adhesive film.

[0039] Specifically, the bifacial solar cell pieces are connected by a transparent adhesive film, which can further fix the solar cell pieces, and the transparent adhesive film can improve the reflectivity and refractivity of light, thereby improving the power generation rate of the back solar cell pieces.

[0040] In some optional embodiments, the wavelength of the light reflected by the light reflecting layer is 300nm-1100nm.

[0041] Specifically, the solar cell piece can absorb visible light and part of the infrared band light, and the absorption band is 300nm-1100nm. Ultraviolet light has certain harm to the solar cell piece, which can accelerate the aging of the solar cell piece and reduce the conversion efficiency of the cell. Therefore, when the light reflecting layer reflects the sunlight passing through the cell piece interval to the back of the cell piece, the ultraviolet light is avoided to be reflected to the back of the cell piece. Therefore, the wavelength of the light reflected or refracted by the light reflecting layer is 300nm-1100nm.

[0042] In some optional embodiments, as shown in Figure 8 , the substrate includes a metal plate 11, and the metal plate 11 includes a first protective layer 101, a metal material layer 102, and a second protective layer 103 which are stacked, wherein the first protective layer 101 is in contact with the light reflecting layer 20, Figure 8 , and other structure position relationships are the same as those in Figure 3 , which will not be described here.

[0043] Specifically, the metal material layer plays a role of supporting the battery piece, and the metal material has good heat conduction performance, thereby enhancing the heat dissipation performance of the back battery piece. The material of the metal material layer includes, but is not limited to, copper, aluminum, iron, nickel, tin, titanium, tungsten, zinc, and alloys or combinations thereof, and the present application does not make specific limitations, and those skilled in the art can select according to product requirements.

[0044] The first protective layer includes a metal oxide, and contacting the reflective layer can enhance the bonding capacity of the metal plate and the reflective layer; the second protective layer includes an organic material layer, an inorganic material layer, a corrosion-resistant coating layer, and an electrochemical corrosion-resistant material layer. Specifically, the material of the organic material layer includes, but is not limited to, resin and organic polymer; the material of the inorganic material layer includes, but is not limited to, metal maintenance material; the material of the corrosion-resistant coating layer includes, but is not limited to, polyurethane, epoxy resin, and silicone; the electrochemical corrosion-resistant material layer includes zinc plating, chrome plating, and zinc-aluminum plating formed by electroplating process, and the present application does not make specific limitations, and those skilled in the art can select according to product requirements. The second protective layer can protect the metal material layer from material corrosion caused by environmental factors, thereby improving the trial life of the building integrated photovoltaic module.

[0045] In some optional embodiments, as shown in Figure 2 、 Figure 3 and Figure 8 , the building integrated photovoltaic module further includes a back plate 70 and a third adhesive film layer 80, the back plate 70 is located between the first adhesive film layer 30 and the battery piece layer 40, the third adhesive film layer 80 is located between the back plate 70 and the battery piece layer 40, and the third adhesive film layer 80 is a transparent adhesive film.

[0046] Specifically, the back plate can further fix the bifacial solar battery piece, and the transparent third adhesive film and the transparent back plate enable the front surface to directly penetrate the back plate to reach the metal surface reflective layer when the front surface of the module is irradiated.

[0047] In some optional embodiments, the front plate and the back plate include at least one of a glass substrate and a polymer composite plate.

[0048] Specifically, the light transmittance of the front plate and the back plate can be 80% to 93% (for light with a wavelength of 300 nm to 1100 nm). In actual application, the thickness of the front plate and the back plate can be any value in the range of 0.1 mm to 5 mm, which can be set according to actual requirements by those skilled in the art, and the present application does not make limitations on this.

[0049] In some optional embodiments, the transparent adhesive film includes at least one of a POE adhesive film and an EVA adhesive film.

[0050] Specifically, the POE film is a polyolefin elastomer (POE for short), has high transparency, good light transmittance, and can transmit light in a long wavelength range. The POE film has the advantages of plastic and rubber, has high elasticity, high strength, high elongation and other physical characteristics, and is a non-polar material that does not form hydrogen bonds with water molecules, and does not affect the adsorption and adhesion of the film. The EVA film is a heat-curable, adhesive and highly transparent film, and the main component is polyethylene-vinyl acetate copolymer (EVA for short), which can be used to connect glass materials and has good durability, can resist high temperature, humidity and ultraviolet light.

[0051] It should also be noted that the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, article or apparatus that includes a series of elements not only includes those elements, but also includes other elements not explicitly listed, or inherent to such a process, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, article or apparatus that includes the element.

[0052] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A building integrated photovoltaic assembly, characterized in that The application relates to a solar cell module. The solar cell module comprises a substrate and a reflective layer, a first adhesive film layer, a cell layer, a second adhesive film layer and a front plate which are arranged in sequence on one side of the substrate, wherein the first adhesive film layer and the second adhesive film layer are both transparent adhesive films. The cell layer comprises a plurality of spaced-apart double-sided solar cell pieces, and the double-sided solar cell pieces have a spacing between adjacent double-sided solar cell pieces.

2. Building integrated photovoltaic module according to claim 1, characterized in that The incident light irradiated to the spacing is transmitted to the first adhesive film layer, the first adhesive film layer is a transparent adhesive film, the incident light is refracted and transmitted to the reflective layer, the reflective layer reflects the incident light to the back surface of the double-sided solar cell piece, and thus the back surface of the cell layer generates electricity.

3. Building integrated photovoltaic module according to claim 2, characterized in that The double-sided solar cell pieces are arranged along a first direction and a second direction.

4. The building integrated photovoltaic assembly of claim 1, wherein, The first spacing between any adjacent double-sided solar cell pieces in the first direction is 1mm-2mm, and the second spacing between any adjacent double-sided solar cell pieces in the second direction is 1.5mm-2.5mm.

5. The building integrated photovoltaic assembly of claim 1, wherein, The first direction is perpendicular to the second direction.

6. The building integrated photovoltaic assembly of claim 1, wherein, The first spacing is greater than the second spacing.

7. The building integrated photovoltaic assembly of claim 1, wherein, The adjacent double-sided solar cell pieces are connected through the transparent adhesive film. The wavelength of the light reflected by the reflective layer is 300nm-1100nm.

8. Building integrated photovoltaic module according to claim 7, characterized in that The substrate comprises a metal plate which comprises a first protective layer, a metal material layer, a second protective layer and a reflective layer which are arranged in sequence.

9. Building integrated photovoltaic module according to any of claims 1 to 8, characterized in that The application further relates to a solar cell module. The solar cell module comprises a back plate which is located between the first adhesive film layer and the cell layer and has a third adhesive film layer between the cell layer. The front plate and the back plate comprise at least one of a glass substrate and a polymer composite plate. The transparent adhesive film comprises at least one of a POE adhesive film and an EVA adhesive film.

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