Photovoltaic glass and photovoltaic module

Abstract

The utility model discloses photovoltaic glass and a photovoltaic assembly, the photovoltaic glass is applied to front glass of the photovoltaic assembly, and the photovoltaic glass comprises a toughened glass body; the tempered glass body comprises a first surface and a second surface; an antireflection film is arranged in the center area of the first surface; embossing structures are arranged on the edge area of the first surface and the second surface. The antireflection film is arranged in the center area of the first surface of the tempered glass body, so that the light transmittance of sunlight is improved; and the edge area on the first surface and the second surface of the tempered glass body are provided with the embossed structures, so that the sealing performance between the tempered glass body and the sealant and the sealing performance between the tempered glass body and the front adhesive film are improved, and the sealing performance and long-term reliability of the internal structure of the photovoltaic module using the tempered glass body are further ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field especially relates to a kind of photovoltaic glass and photovoltaic module. BACKGROUND

[0002] Photovoltaic glass is one of important components of photovoltaic module, with low iron content, high light transmittance, high temperature and low temperature resistance, oxidation resistance, corrosion resistance and other characteristics, ensure that photovoltaic module can resist the influence of external environment for long time in its life cycle, maintain stable power generation performance.

[0003] The middle region of photovoltaic glass and photovoltaic cell are connected by adhesive film structure in photovoltaic module, and the edge of photovoltaic glass is connected by sealing adhesive and frame, and the tightness of the adhesive connection structure between photovoltaic glass, sealing adhesive and adhesive film structure directly affects the sealing performance and long-term reliability of the internal structure of photovoltaic module. SUMMARY

[0004] The utility model discloses a kind of photovoltaic glass and photovoltaic module, when photovoltaic glass is applied to photovoltaic module, the sealing property and reliability of photovoltaic module can be improved.

[0005] To solve the above technical problems, the utility model provides a kind of photovoltaic glass, it is applied to the front glass of photovoltaic module, including toughened glass body;The toughened glass body includes first surface and second surface;The center region of the first surface is provided with anti-reflection film;The edge region of the first surface and the second surface are all provided with embossing structure.

[0006] In an alternative embodiment of the present application, the embossing structure is a combination structure of one or more structures of pyramid, triangular pyramid, semicircular sphere, semi-elliptical sphere, trapezoidal body, cube, cuboid or cylinder.

[0007] In an alternative embodiment of the present application, the depth of the embossing structure is 0.01mm~0.2mm;The thickness of the toughened glass body is 1.6mm~10mm.

[0008] In an alternative embodiment of the present application, the anti-reflection film is one film layer or a plurality of film layers stacked combination film layer of SiO2 film, TiO2 film, Si3N4 film, Al2O3 film, MgF2 film, ZrO2 film.

[0009] In an alternative embodiment of the present application, the thickness of the anti-reflection film is 50nm~500nm.

[0010] In an alternative embodiment of the present application, the central region of the second surface is further provided with a light conversion material layer for generating light waves in the second waveband range under excitation of light waves in the first waveband range; wherein the second waveband range is a waveband range of 500nm-1000nm; and the first waveband range is a waveband range less than 500nm or greater than 1000nm.

[0011] In an alternative embodiment of the present application, the light conversion material layer comprises a first light conversion material layer and / or a second light conversion material layer.

[0012] The first light conversion material layer is a material layer capable of converting infrared light into light waves in the second waveband range; and the second light conversion material layer is a material layer capable of converting ultraviolet light into light waves in the second waveband range.

[0013] In an alternative embodiment of the present application, the first light conversion material layer and the second light conversion material layer are any one of a fluoride material layer, an oxide material layer or a sulfide material layer.

[0014] A photovoltaic module comprises the photovoltaic glass as claimed in any one of the preceding claims, and further comprises a front-side adhesive film, a photovoltaic cell layer, a back-side adhesive film and a back-side plate structure; wherein the photovoltaic glass, the front-side adhesive film, the photovoltaic cell layer, the back-side adhesive film and the back-side plate structure are sequentially stacked.

[0015] In an alternative embodiment of the present application, the back-side plate structure is tempered glass, and the surface of the tempered glass adhering to the back-side adhesive film is provided with an embossing structure.

[0016] The photovoltaic glass and the photovoltaic module provided by the present application are applied to the front-side glass of the photovoltaic module, and comprise a tempered glass body; the tempered glass body comprises a first surface and a second surface; the central region of the first surface is provided with an anti-reflection film; and the edge region of the first surface and the second surface are both provided with an embossing structure.

[0017] The photovoltaic glass in the application is used as the front glass in the photovoltaic module, the first surface of the tempered glass body is the surface away from the photovoltaic cell, and the second surface is the surface bonded with the front adhesive film in the photovoltaic module; in addition, the central region on the first surface of the tempered glass body should be the transmission region facing the photovoltaic cell; therefore, the anti-reflection film arranged on the central region of the first surface in the application can improve the light transmittance of sunlight transmitted through the tempered glass body to the photovoltaic cell to a certain extent; on this basis, the edge region on the first surface and the second surface of the tempered glass body are further provided with the embossing structure, that is, the roughness of the edge region on the first surface and the second surface of the tempered glass body is increased, and in the process of bonding the edge of the tempered glass body with the sealant and the frame and bonding the second surface of the tempered glass body with the front adhesive film and the photovoltaic cell, the bonding effect between the tempered glass body and the sealant and the front adhesive film is increased, that is, the sealing performance between the tempered glass body and the sealant and the front adhesive film is improved, thereby ensuring the sealing performance and long-term reliability of the internal structure of the photovoltaic module using the tempered glass body.

[0018] In addition, the surface of the tempered glass body in the application is provided with the embossing structure, which can also increase the friction of the surface of the photovoltaic glass to a certain extent, thereby avoiding the problem of scratches caused by sliding of the photovoltaic glass during transportation. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0020] Figure 1 The cross-sectional structure schematic diagram of the photovoltaic glass provided by the embodiment of the application;

[0021] Figure 2 The cross-sectional structure schematic diagram of the photovoltaic module provided by the embodiment of the application;

[0022] Figure 3 The coordinate schematic diagram of the response and absorption efficiency of the photovoltaic cell to light of different wavebands. DETAILED DESCRIPTION

[0023] The core of the application is to provide a photovoltaic glass and a photovoltaic module, which can improve the sealing performance between the adhesive film structure and the sealant structure in the photovoltaic glass and the photovoltaic module to a certain extent, thereby improving the sealing performance and reliability of the photovoltaic module.

[0024] In order to make the person skilled in the art better understand the utility model scheme, the utility model is further described in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the utility model.

[0025] As shown in Figure 1 And Figure 2 As shown in Figure 1 The cross-sectional structure schematic diagram of the photovoltaic glass provided by the embodiment of the application is shown in the figure. Figure 2 The cross-sectional structure schematic diagram of the photovoltaic module provided by the embodiment of the application is shown in the figure.

[0026] In a specific embodiment of the application, the photovoltaic glass is the front glass applied in the photovoltaic module, and the photovoltaic glass can specifically include:

[0027] The tempered glass body 1 includes a first surface and a second surface; the central region of the first surface is provided with an anti-reflection film 11; the edge region of the first surface and the second surface are both provided with an embossed structure 12.

[0028] As shown in Figure 1 And Figure 2 The tempered glass body 1 in the embodiment is a flat plate structure as a whole, and the side surface of the tempered glass body 1 away from the photovoltaic cell layer 3 is the first surface, and the central region of the first surface of the tempered glass body 1 opposite to the photovoltaic cell layer 3 is the light-transmitting region for transmitting the sunlight, and the edge region surrounding the light-transmitting region is the region connected with the frame through the sealing glue 4. The side surface of the tempered glass body 1 close to the photovoltaic cell layer 3 is the second surface, and the second surface of the tempered glass body 1 is used for being bonded and connected with the photovoltaic cell layer 3 through the front adhesive film 2.

[0029] On this basis, the anti-reflection film 11 is arranged on the central region of the first surface of the tempered glass body 1, so as to increase the light transmission rate of the sunlight transmitted to the photovoltaic cell layer 3 through the central region. The thickness of the anti-reflection film 11 can be 50nm~500nm, and the anti-reflection film 11 can be the film layer formed by one or more film stacking combinations of SiO2 film, TiO2 film, Si3N4 film, Al2O3 film, MgF2 film and ZrO2 film.

[0030] In addition, the edge area on the first surface and the second surface of the tempered glass body 1 are further provided with the embossing structure 12, that is, the roughness of the edge area on the first surface and the second surface of the tempered glass body 1 is increased, the bonding force of the second surface of the tempered glass body 1 and the front adhesive film 2 is increased, the sealing between the second surface of the tempered glass body 1 and the front adhesive film 2 is improved, and the sealing between the edge area of the first surface and the second surface of the tempered glass body 1 and the sealing glue 4 is also improved. Therefore, when the tempered glass body 1 in the application is applied to the photovoltaic module as the front glass, the sealing of the overall structure of the photovoltaic module can be improved, and the reliability of the photovoltaic module in long-term use can be improved.

[0031] In addition, the surface of the tempered glass body 1 in the application is provided with the embossing structure 12, which can increase the friction of the surface of the photovoltaic glass to a certain extent, thereby avoiding the problem of scratching caused by sliding of the photovoltaic glass during transportation.

[0032] Further, the embossing structure 12 in the application can include one or a combination of structures of pyramid, triangular pyramid, semicircular sphere, semi-elliptical sphere, trapezoidal body, square, rectangular or cylinder.

[0033] It can be understood that the embossing structure 12 in the embodiment is pyramid, triangular pyramid, semicircular sphere, semi-elliptical sphere, trapezoidal body, square, which refers to forming one or more convex three-dimensional structures such as pyramid, triangular pyramid, semicircular sphere, semi-elliptical sphere, trapezoidal body, square on the surface of the tempered glass body 1, and the embossing structure 12 is rectangular or cylindrical, which refers to forming a strip edge structure of rectangular or partial cylinder on the surface of the tempered glass body 1. In actual application, as long as the edge area of the first surface and the second surface of the tempered glass body 1 are non-smooth surfaces.

[0034] Of course, the size of the embossing structure 12 formed by the pyramid, triangular pyramid, semicircular sphere, semi-elliptical sphere, trapezoidal body, square, rectangular or cylinder in the application is much smaller than the size of the tempered glass body 1. For example, when the thickness of the tempered glass body 1 is 1.6mm-10mm, the depth of the embossing structure 12 can be 0.01mm-0.2mm.

[0035] Based on any of the above embodiments, in order to further improve the utilization rate of sunlight of the photovoltaic glass applied to the photovoltaic module, in an optional embodiment of the application, the photovoltaic glass can further include:

[0036] The central region of the second surface is further provided with a light conversion material layer 13 for generating light waves in the second waveband range under excitation of light waves in the first waveband range; wherein the second waveband range is a waveband range of 500nm-1000nm; and the first waveband range is a waveband range less than 500nm or greater than 1000nm.

[0037] As shown in Figure 3 , Figure 3 is a coordinate diagram of the response absorption efficiency of the photovoltaic cell layer 3 to different waveband light. Based on Figure 3 , it can be known that the photovoltaic assembly has a higher response absorption efficiency to light in the waveband range of 500nm-1000nm, and a lower response absorption efficiency to light in other waveband ranges; therefore, the light conversion material layer 13 is further provided on the central region of the second surface of the tempered glass body 1 in the embodiment, which can convert light in the first waveband range, i.e. light in the waveband range less than 500nm or greater than 1000nm, into light in the second waveband range, i.e. light in the waveband range of 500nm-1000nm.

[0038] When the tempered glass body 1 is applied to the photovoltaic assembly, when sunlight is incident on the light conversion material layer 13 on the second surface of the tempered glass body 1, the light energy of light in the first waveband range can be absorbed, and light in the second waveband range can be excited and output, and the excited light is incident on the photovoltaic cell layer 3 and can be converted into electrical energy by the photovoltaic cell layer 3. As can be seen, the tempered glass body 1 in the embodiment can excite and output light in the second waveband range by using the light energy of light in the first waveband range which has a low response absorption efficiency of the photovoltaic cell layer 3, i.e. the energy utilization rate of the photovoltaic cell layer 3 to sunlight can be improved to a certain extent, and the power generation efficiency of the photovoltaic assembly is improved.

[0039] On this basis, in an alternative embodiment of the embodiment, the light conversion material layer 13 comprises a first light conversion material layer and / or a second light conversion material layer;

[0040] The first light conversion material layer is a material layer capable of converting infrared light into light in the second waveband range; and the second light conversion material layer is a material layer capable of converting ultraviolet light into light in the second waveband range.

[0041] In practical applications, a single light conversion material layer 13 is difficult to both absorb light wave energy less than 500 nm and be excited to output light waves in the 500 nm-1000 nm band, and to absorb light wave energy greater than 1000 nm and be excited to output light waves in the 500 nm-1000 nm band. Therefore, in the present embodiment, the first light conversion material layer can be provided on the second surface of the tempered glass body 1, which can absorb the energy of infrared light and be excited to output light waves in the 500 nm-1000 nm band. The second light conversion material layer can be provided on the second surface of the tempered glass body 1, which can absorb ultraviolet light and be excited to output light waves in the 500 nm-1000 nm band. The first light conversion material layer and the second light conversion material layer can be stacked on the second surface of the tempered glass body 1. Thus, the ability of infrared light and ultraviolet light in sunlight can be fully utilized, thereby improving the utilization rate of sunlight by the photovoltaic cell layer 3 and improving the power generation efficiency of the photovoltaic module.

[0042] For the first light conversion material layer and the second light conversion material layer in the present embodiment, any one of a fluoride material layer, an oxide material layer, or a sulfide material layer can be used.

[0043] For example, the first light conversion material layer can be a fluoride material layer, an oxide material layer, or a sulfide material layer doped with one of Er3+, Tm3+, and Ho3+.

[0044] The second light conversion material layer can be a fluoride material layer or an oxide material layer doped with one of Tb3+, Pr3+, Tm3+, and Gd3+, or a fluoride material layer or an oxide material layer co-doped with one of Tb3+, Pr3+, Tm3+, and Gd3+ and one of Yb3+ or Nd3+.

[0045] In addition, it should be noted that the light conversion material layer 13 in the present embodiment can be a thin film layer or a material coating layer. In summary, the thickness thereof should be relatively small, so as to ensure that the light conversion material layer 13 is provided on the embossed structure 12 on the second surface of the tempered glass body 1, and also to maintain the rough surface thereof.

[0046] In summary, when the photovoltaic glass in the application is used as the front glass in the photovoltaic module, the first surface of the tempered glass body is the surface away from the photovoltaic cell, and the second surface is the surface bonded and connected with the front adhesive film in the photovoltaic module. In addition, the central region on the first surface of the tempered glass body should be a transmission region facing the photovoltaic cell. Therefore, the anti-reflection film provided on the central region of the first surface in the application can improve the light transmittance of sunlight transmitted through the tempered glass body to the photovoltaic cell to a certain extent. On this basis, the edge region on the first surface and the second surface of the tempered glass body are further provided with the embossing structure in the application, that is, the roughness of the edge region on the first surface and the second surface of the tempered glass body is increased. In the process of bonding and connecting the tempered glass body with the sealing glue and the frame through the edge of the tempered glass body, and bonding and connecting the tempered glass body with the photovoltaic cell through the second surface of the tempered glass body and the front adhesive film, the bonding effect between the tempered glass body and the sealing glue and the front adhesive film is increased, that is, the sealing property between the tempered glass body and the sealing glue and the front adhesive film is improved, thereby ensuring the sealing performance and long-term reliability of the internal structure of the photovoltaic module using the tempered glass body.

[0047] As shown in Figure 2 The application further provides a photovoltaic module, which comprises the photovoltaic glass according to any one of the above, and a front adhesive film 2, a photovoltaic cell layer 3, a back adhesive film 5, and a back panel structure 6, which are sequentially stacked.

[0048] Further optionally, the back panel structure 6 can also be tempered glass, and the surface of the tempered glass bonded with the back adhesive film 5 is provided with an embossing structure 12.

[0049] In the embodiment, the surface of the tempered glass as the back glass plate of the photovoltaic module is also provided with the embossing structure 12, which can further improve the sealing property between the back glass plate, the back adhesive film 5, and the sealing film 4 in the photovoltaic module, thereby improving the overall sealing property of the photovoltaic module.

[0050] It should be noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the article "a" or "an" is intended to include one or more items, and any combinations thereof. Additionally, the above-described technical solutions provided by the embodiments of the present application have not been described in detail, which are consistent with the implementation principles of the corresponding technical solutions in the prior art, so as not to make the present application too long.

[0051] The principles and implementation modes of the present application are described by using specific examples herein. The above examples are only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A photovoltaic glass, characterized in that, The application discloses front glass applied to a photovoltaic module, which comprises a tempered glass body; the tempered glass body comprises a first surface and a second surface; a central region of the first surface is provided with an anti-reflection film; an edge region of the first surface and the second surface are both provided with an embossing structure.

2. The photovoltaic glass of claim 1, wherein, The embossing structure is a combination structure of one or more structures of a pyramid, a triangular pyramid, a semicircular sphere, a semi-elliptical sphere, a trapezoidal body, a square body, a cuboid or a cylinder.

3. The photovoltaic glass of claim 2, wherein, The depth of the embossing structure is 0.01mm-0.2mm; the thickness of the tempered glass body is 1.6mm-10mm.

4. The photovoltaic glass of claim 1, wherein, The anti-reflection film is one film layer or a film layer stacked in combination of multiple film layers selected from SiO2 film, TiO2 film, Si3N4 film, Al2O3 film, MgF2 film and ZrO2 film.

5. The photovoltaic glass of claim 4, wherein the transparent conductive oxide layer is a layer of indium tin oxide. The thickness of the anti-reflection film is 50nm-500nm.

6. Photovoltaic glass according to any of claims 1 to 5, characterized in that The central region of the second surface is further provided with a light conversion material layer for generating light waves in a second wave band range under excitation of light waves in a first wave band range; the second wave band range is a wave band range of 500nm-1000nm; and the first wave band range is a wave band range of less than 500nm or more than 1000nm.

7. The photovoltaic glass of claim 6, wherein, The light conversion material layer comprises a first light conversion material layer and / or a second light conversion material layer. The first light conversion material layer is a material layer capable of converting infrared light into light waves in the second wave band range; and the second light conversion material layer is a material layer capable of converting ultraviolet light into light waves in the second wave band range.

8. The photovoltaic glass of claim 7, wherein, The first light conversion material layer and the second light conversion material layer are any one of a fluoride material layer, an oxide material layer or a sulfide material layer.

9. A photovoltaic module, characterized by The application further discloses a photovoltaic glass, which comprises the front glass, a front adhesive film, a photovoltaic cell layer, a back adhesive film and a back plate structure; the photovoltaic glass, the front adhesive film, the photovoltaic cell layer, the back adhesive film and the back plate structure are sequentially stacked.

10. The photovoltaic module of claim 9, wherein, The back plate structure is tempered glass, and the surface of the tempered glass attached to the back adhesive film is provided with an embossing structure.

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