Photovoltaic glass

Abstract

The invention discloses photovoltaic glass, and relates to the technical field of photovoltaics. The photovoltaic glass comprises a top plate and a base plate, the top plate and the base plate are arranged in parallel, a first film layer is arranged on the side, away from the base plate, of the top plate, the first film layer is an anti-reflection film layer, a groove is formed in the side, close to the top plate, of the base plate, a plurality of arc-surface-shaped protrusions are arranged on the bottom face of the groove in an array mode, and the protrusions are arranged on the bottom face of the groove. The protrusion is used for focusing light rays reaching the protrusion in the groove, and the top plate and the substrate limit a sealing cavity at the position of the groove. The photovoltaic glass provided by the embodiment of the invention can improve the utilization efficiency of illumination and improve the power generation efficiency of a photovoltaic panel on the premise of ensuring the light transmission effect of light.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular, to a photovoltaic glass. Background Art

[0002] In the field of photovoltaic power generation technology, improving the photoelectric conversion efficiency of solar cells is the focus of research. However, the photovoltaic glass, which serves as the cover plate of photovoltaic modules, is also one of the important factors affecting the conversion efficiency. Photovoltaic glass is an important auxiliary material for photovoltaic modules, mainly providing high light transmittance and weather protection. After being tempered, the photovoltaic glass has higher strength, which can ensure that the battery cells can withstand large temperature differences and wind pressures, and can also protect the battery cells from corrosion by rainwater and harmful gases in the environment. When used in a photovoltaic power generation system, the photovoltaic glass can improve the photovoltaic power generation efficiency, reduce costs, and extend the service life of photovoltaic modules.

[0003] In related technologies, in order to improve the utilization efficiency of light and reduce light reflection, matte pits are formed on the surface of the photovoltaic glass panel. In this way, light undergoes diffuse reflection on the surface of the pits, thereby reducing light reflection loss. However, the design of the pits makes the photovoltaic glass panel prone to dust accumulation, thereby reducing the light transmittance. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related technologies to some extent.

[0005] To this end, an embodiment of the present invention provides a photovoltaic glass, which can improve the utilization efficiency of light and the power generation efficiency of the photovoltaic panel on the premise of ensuring the light transmission effect on light.

[0006] The photovoltaic glass according to the embodiment of the present invention includes:

[0007] A top plate and a substrate, the top plate and the substrate are arranged in parallel, a first film layer is provided on a side of the top plate away from the substrate, the first film layer is an antireflection film layer, a groove is provided on a side of the substrate close to the top plate, and a plurality of arc-shaped protrusions are arranged in an array on the bottom surface of the groove. The protrusions are used for focusing the light entering the protrusions in the groove, and the top plate and the substrate define a sealed cavity at the position of the groove.

[0008] The photovoltaic glass according to the embodiment of the present invention can improve the utilization efficiency of light and the power generation efficiency of the photovoltaic panel on the premise of ensuring the light transmission effect on light.

[0009] In some embodiments, a plurality of support columns are arranged at intervals in the groove, and the top surface of the support columns is flush with the top surface of the substrate.

[0010] In some embodiments, the cross section of the support column is circular, and the support column is made of a transparent material.

[0011] In some embodiments, the top plate is adhesively sealed to the substrate, and the sealing cavity is a vacuum cavity.

[0012] In some embodiments, the bottom surface of the groove is frosted, and the height of the protrusion is not greater than the radius of the sphere corresponding to the protrusion.

[0013] In some embodiments, a second film layer is provided on a side of the first film layer away from the top plate, and the thickness of the second film layer is not greater than the thickness of the first film layer.

[0014] In some embodiments, the second film layer is an antireflection film layer, or the second film layer is an anti-reflection film layer, or the second film layer is an anti-fouling film layer.

[0015] In some embodiments, the anti-reflection film layer has a microporous structure layer for increasing the transmittance of sunlight.

[0016] In some embodiments, the material of the anti-reflection film layer is SiO2.

[0017] In some embodiments, the thickness of the substrate is greater than the thickness of the top plate, and the depth of the groove is not greater than the thickness of the top plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a photovoltaic glass according to an embodiment of the present invention.

[0019] Figure 2 is Figure 1 an enlarged view of part A in

[0020] Figure 3 is a top view of the substrate in the photovoltaic glass according to an embodiment of the present invention.

[0021] REFERENCE SIGNS:

[0022] Top plate 1;

[0023] Substrate 2; groove 21; protrusion 22; sealing cavity 23; support column 24;

[0024] First film layer 3;

[0025] Second film layer 4. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0027] As Figure 1 、Figure 2 and Figure 3 As shown in Figure 3 , the photovoltaic glass of the embodiment of the present invention includes a top plate 1 and a substrate 2. The top plate 1 and the substrate 2 are arranged in parallel. A first film layer 3 is provided on the side of the top plate 1 away from the substrate 2. The first film layer 3 is an antireflection film layer. A groove 21 is provided on the side of the substrate 2 close to the top plate 1. A plurality of arc-shaped protrusions 22 are arranged in an array on the bottom surface of the groove 21. The protrusions 22 are used to focus the light reaching the protrusions 22 in the groove 21. The top plate 1 and the substrate 2 limit a sealed cavity 23 at the position of the groove 21.

[0028] The photovoltaic glass of the embodiment of the present invention is divided into a top plate 1 and a substrate 2 by layers. Before the light irradiates on the top plate 1, it first passes through the antireflection film layer, reducing the refraction of the light on the surface of the photovoltaic glass, increasing the absorption of light, and at the same time, the antireflection film layer can protect the glass surface, reducing the accumulation of dust, and at the same time increasing the light transmission effect of the top plate 1. The light passing through the top plate 1 reaches the sealed cavity 23. The light undergoes diffuse reflection in the groove 21. At the same time, the protrusions 22 in the groove 21 divide the substrate 2 into a plurality of convex lenses. The light reaches the position of the protrusions 22 and converges on the side of the substrate 2 away from the top plate 1 after passing through the protrusions 22, ensuring the absorption and conversion of light by the cell board located below the photovoltaic glass.

[0029] The photovoltaic glass of the embodiment of the present invention can improve the utilization efficiency of light, improve the power generation efficiency of the photovoltaic panel, save floor space, make full use of solar energy and convert it into electric energy, and improve the photoelectric conversion efficiency on the premise of ensuring the light transmission effect of the light.

[0030] It should be noted that the antireflection film layer of the photovoltaic glass, that is, the antireflection coating, is to coat an antireflection film on the surface of the photovoltaic glass substrate through a roll coating process. The antireflection film is mainly a porous film layer composed of nano-SiO2 particles, which has a good antireflection and antireflection effect. Then, it undergoes high-temperature tempering sintering to improve the bonding force between the film layer and the glass, enhance the strength of the glass, and at the same time improve the output power of the photovoltaic module.

[0031] In some embodiments, as Figure 1 、 Figure 2 and Figure 3 shown, a plurality of support columns 24 are arranged at intervals in the groove 21. The top surface of the support column 24 is flush with the top surface of the substrate 2. By providing the support columns 24, the top plate 1 is supported in the groove 21, improving the structural strength and connection reliability when the top plate 1 and the substrate 2 are fixed together, and ensuring the use quality and service life of the photovoltaic glass.

[0032] In some embodiments, as Figure 2 and Figure 3As shown, the cross-section of the support column 24 is circular, and the support column 24 is made of a transparent material. By setting the support column 24 as a cylinder, while ensuring the quality of the photovoltaic glass remains unchanged, the effective support area of a single support column 24 is increased, enhancing the connection strength between the top plate 1 and the substrate 2. At the same time, by setting the support column 24 as a transparent structure, it will not obstruct the light from entering through the top plate 1, ensuring the transmission of light in the sealed cavity 23, and then ensuring the light transmission efficiency of the photovoltaic glass, thereby losing less light and improving the power generation efficiency of the device.

[0033] In some embodiments, the top plate 1 and the substrate 2 are adhesively sealed, and the sealed cavity 23 is a vacuum cavity. The top plate 1 and the substrate 2 are adhesively bonded through a sealant, which can ensure the sealing effect of the sealed cavity 23. At the same time, the sealed cavity 23 is evacuated to form a heat insulation cavity, reducing the heat transfer between the top plate 1 and the substrate 2, ensuring that the temperature of the bottom plate meets the optimal working temperature of the cell board, facilitating the photoelectric conversion of the cell board, improving the power generation efficiency, and at the same time ensuring that there are no impurities and water vapor in the sealed cavity 23, avoiding the refraction and scattering of light after passing through the top plate 1 and then through the impurities or water vapor in the sealed cavity 23, and ensuring the penetration efficiency of light at the position of the substrate 2.

[0034] In some embodiments, the bottom surface of the groove 21 is frosted, and the height of the protrusion 22 is not greater than the radius of the sphere corresponding to the protrusion 22. By frosting the bottom surface of the groove 21, the diffuse reflection of light in the groove 21 is reduced, and then it is ensured that the light entering the sealed groove can be transmitted in the direction from the top plate 1 to the substrate 2, ensuring the light transmittance. At the same time, the size of the protrusion 22 is restricted to ensure the focusing effect of light, unifying the refraction direction of light after passing through the protrusion 22, facilitating the aggregation of light, and improving the photovoltaic power generation effect.

[0035] In some embodiments, as Figure 1 and Figure 2 shown, a second film layer 4 is provided on the side of the first film layer 3 away from the top plate 1, and the thickness of the second film layer 4 is not greater than the thickness of the first film layer 3. By providing the second film layer 4, the refraction of light when it reaches the top plate 1 is further reduced, ensuring the light transmittance, and the power generation power of the photovoltaic module can be improved.

[0036] In some embodiments, the second film layer 4 is an antireflection film layer. By providing the antireflection film layer, the light transmittance of the top plate 1 can be improved, ensuring the penetration efficiency of light at the position of the top plate 1, and then increasing the utilization efficiency of the photovoltaic module for light.

[0037] In some embodiments, the second film layer 4 is an anti-reflection film layer. The first film layer 3 is formed by directly coating the bottom coating solution on the top plate 1 of the photovoltaic glass. The bottom coating solution is cured into a film on the top plate 1 of the photovoltaic glass. The second film layer 4 is coated on the surface of the bottom film layer, and after curing and tempering treatments, a double-layer anti-reflection film layer is formed on the glass surface.

[0038] In some embodiments, the second film layer 4 is an anti-fouling film layer. An anti-fouling film layer is provided outside the first film layer 3. The anti-fouling film layer can reduce the accumulation of dust on the outside of the top plate 1, avoid interfering with the light transmittance of the top plate 1, and at the same time, the impurities on the anti-fouling film layer are relatively easy to clean, which is beneficial to ensuring the cleanliness of the surface of the photovoltaic glass and reducing the influence of external stains on the light transmittance of the photovoltaic glass.

[0039] In some embodiments, the anti-reflection film layer has a microporous structure layer for increasing the sunlight transmittance. The microporous structure layer has a number of micropores distributed in an array to improve the sunlight transmittance. Among them, the material of the anti-reflection film layer is SiO2.

[0040] In some embodiments, the thickness of the substrate 2 is greater than the thickness of the top plate 1, ensuring that the part of the substrate 2 below the groove 21 has the minimum thickness, ensuring the overall structural strength of the substrate 2, and the depth of the groove 21 is not greater than the thickness of the top plate 1, facilitating the processing of the inside of the groove 21 and ensuring the minimum size of the sealing cavity 23.

[0041] Optionally, the thickness of the substrate 2 is 8 - 12 mm, the thickness of the top plate 1 is 4 - 8 mm, and the thickness of the groove 21 is 2 - 4 mm.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention.

[0043] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0044] In the present invention, unless otherwise clearly stipulated or defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly stipulated or defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0047] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A kind of photovoltaic glass, characterized in that, Comprising: A top plate and a base plate, the top plate and the base plate are arranged in parallel. A first film layer is provided on the side of the top plate away from the base plate, and the first film layer is an antireflection film layer. A groove is provided on the side of the base plate close to the top plate. A plurality of arc-shaped protrusions are arranged in an array on the bottom surface of the groove. The protrusions are used to focus the light reaching the protrusions in the groove. The top plate and the base plate define a sealed cavity at the position of the groove.

2. The photovoltaic glass according to claim 1, characterized in that, A plurality of support columns are arranged at intervals in the groove, and the top surface of the support columns is flush with the top surface of the base plate.

3. The photovoltaic glass according to claim 2, wherein, The cross section of the support column is circular, and the support column is made of a transparent material.

4. The photovoltaic glass according to claim 1, wherein The top plate and the base plate are adhesively sealed, and the sealed cavity is a vacuum cavity.

5. The photovoltaic glass according to claim 1, wherein The bottom surface of the groove is frosted, and the height of the protrusion is not greater than the radius of the sphere corresponding to the protrusion.

6. The photovoltaic glass according to claim 1, characterized in that, A second film layer is provided on the side of the first film layer away from the top plate, and the thickness of the second film layer is not greater than the thickness of the first film layer.

7. The photovoltaic glass according to claim 6, wherein The second film layer is an antireflection enhancement film layer, or the second film layer is an antireflection film layer, or the second film layer is an anti-fouling film layer.

8. The photovoltaic glass according to claim 1, wherein, The antireflection film layer internally has a microporous structure layer for increasing the transmittance of sunlight.

9. The photovoltaic glass according to claim 8, characterized in that, The material of the antireflection film layer is SiO2.

10. The photovoltaic glass according to claim 1, characterized in that, The thickness of the base plate is greater than the thickness of the top plate, and the depth of the groove is not greater than the thickness of the top plate.

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