Solar cell backboard glass

Abstract

The utility model relates to solar cell backboard glass which is provided with a glass body, a buffer layer is arranged on the glass body, the solar cell backboard glass is further provided with a reflective film, and the reflective film is arranged on the glass body or the buffer layer. According to the utility model, through the arrangement of the reflective film, multiple reflections of solar rays in the assembly can be improved, and the power generation power of the photovoltaic assembly is effectively improved; by arranging the buffer layer, the impact resistance of the backboard glass can be improved, and impact damage caused in the glass transportation process is effectively prevented; and compared with the existing backboard glass with the same thickness, the weight is reduced, so that the assembly weight can be reduced, and the installation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cells, in particular to a solar cell back plate glass. Background Art

[0002] Solar energy is an inexhaustible clean energy, and solar cell modules are one of the core components of solar power generation systems. There are two types of crystalline silicon solar cell modules, single-glass modules and double-glass modules, which are made of front glass, upper encapsulation film, lower encapsulation film, back plate (or back plate glass), silica gel and frame materials to encapsulate solar cells, and use busbars and junction boxes to lead out current.

[0003] Backplane glass is one of the important packaging materials for double-glass photovoltaic modules. Conventional backplane glass includes float glass and embossed glass. Due to the brittleness of glass, its impact resistance is poor, and the glass body is very easy to be damaged by impact during transportation. In order to improve the conversion effect of light inside the photovoltaic module, the existing backplane glass uses glazed grid glass, but the impact resistance of this glass is further reduced compared to pure glass. Summary of the invention

[0004] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a solar cell back plate glass to further improve the photoelectric conversion efficiency of photovoltaic components and enhance the impact resistance of the glass body.

[0005] The utility model solves the technical problem by adopting the following technical solution: a solar cell back plate glass comprises a glass body, a buffer layer is arranged on the glass body, and a reflective film is arranged on the glass body or the buffer layer.

[0006] Specifically, the outer side of the glass body is bonded to the inner side of the buffer layer through an adhesive layer, a weather-resistant layer is arranged on the outer side of the buffer layer, and a reflective film is arranged on the inner side of the glass body.

[0007] Specifically, the outer side of the glass body is bonded to the inner side of the buffer layer through an adhesive layer, a weather-resistant layer is arranged on the outer side of the buffer layer, and a reflective film is arranged on the inner side of the buffer layer.

[0008] Preferably, the glass body has a thickness of 0.5-2.0 mm, the buffer layer material is a transparent polymer material, the buffer layer thickness is 0.1-0.5 mm, the reflective film width is 3-7 mm, and the weather-resistant layer material is a transparent fluorine film.

[0009] Specifically, the inner side of the glass body is bonded to the outer side of the buffer layer through a bonding layer, a coating layer is arranged on the outer side of the glass body, and a reflective film is arranged on the inner side of the glass body.

[0010] Specifically, the inner side of the glass body is bonded to the outer side of the buffer layer through a bonding layer, a coating layer is provided on the outer side of the glass body, and a reflective film is provided on the inner side of the buffer layer.

[0011] Preferably, the glass body has a thickness of 0.5-2.0 mm, the buffer layer material is a transparent polymer material, the buffer layer thickness is 0.1-0.5 mm, the reflective film width is 3-7 mm, and the coating layer is a high-transmittance anti-reflection film.

[0012] Furthermore, the thickness of the adhesive layer is 50-200 um, and the adhesive layer material can be any one of acrylic pressure-sensitive adhesive, silicone resin adhesive, polyurethane resin adhesive, epoxy adhesive, ethylene-vinyl acetate copolymer or ethylene-polyolefin copolymer adhesive film.

[0013] The beneficial effects of the utility model are as follows: the utility model can increase the multiple reflections of sunlight inside the component by arranging a reflective film, thereby effectively increasing the power generation power of the photovoltaic component. Compared with the glazed grid glass, the component power is increased by 0.5-1%; by arranging a buffer layer, the impact resistance of the back panel glass can be improved, effectively preventing impact damage caused during the transportation of the glass; and compared with the back panel glass of the same thickness, the weight is reduced, thereby reducing the weight of the component and making it easier to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0015] Figure 1 It is a schematic cross-sectional structure diagram of implementation mode 1 of the present utility model.

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of embodiment 2 of the present utility model.

[0017] Figure 3 It is a schematic cross-sectional structure diagram of implementation mode 3 of the present utility model.

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of implementation mode 4 of the present utility model.

[0019] In the figure: 1. Glass body, 2. Buffer layer, 3. Reflective film, 4. Adhesive layer, 5. Weather-resistant layer, 6. Coating layer. DETAILED DESCRIPTION

[0020] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0021] The definitions of the inner side and the outer side in the following description are as follows: when the back panel glass is packaged into a photovoltaic module, the side exposed to the air is defined as the outer side, and the side packaged inside the photovoltaic module is defined as the inner side.

[0022] Implementation 1:

[0023] like Figure 1 The solar cell back panel glass shown includes a glass body 1, an adhesive layer 4, a buffer layer 2, a reflective film 3 and a weather-resistant layer 5, wherein the outer side surface of the glass body 1 is bonded to the inner side surface of the buffer layer 2 through the adhesive layer 4, the weather-resistant layer 5 is arranged on the outer side surface of the buffer layer 2, the weather-resistant layer 5 is realized by coating or composite process, and the material of the weather-resistant layer 5 is a transparent fluorine film, which can improve the environmental resistance reliability of the component; the reflective film 3 with five intervals is arranged on the inner side surface of the glass body 1.

[0024] Implementation 2:

[0025] like Figure 2 The solar cell back panel glass shown is different from the embodiment 1 in that five reflective films 3 arranged at intervals are arranged on the inner side of the buffer layer 2.

[0026] Implementation 3:

[0027] like Figure 3 A solar cell back panel glass is shown, wherein the inner side surface of the glass body 1 is bonded to the outer side surface of the buffer layer 2 through an adhesive layer 4, and a coating layer 6 is provided on the outer side surface of the glass body 1. The coating layer 6 is a high-transmittance anti-reflection film, and the outer side surface of the coating layer 6 is exposed to the air side, which can effectively improve the double-sidedness of the photovoltaic module, and a reflective film 3 is provided on the inner side surface of the glass body 1.

[0028] Implementation 4:

[0029] like Figure 4 The solar cell back panel glass shown is different from the embodiment 3 in that five reflective films 3 arranged at intervals are arranged on the inner side of the buffer layer 2.

[0030] In embodiments 1 to 4, the thickness of the glass body 1 is 2.0 mm, the thickness of the adhesive layer 4 is 150 um, and the material of the adhesive layer 4 is acrylic pressure-sensitive adhesive. The buffer layer 2 can be effectively bonded to the glass body 1 through the adhesive layer 4, with high bonding strength and firm bonding. In addition, due to the flexibility of the buffer layer 2 material, the glass body 1 can be effectively protected. Compared with ordinary glass, the back panel glass has better impact resistance and can effectively prevent impact damage caused by the transportation of the back panel glass. The material of the buffer layer 2 is transparent polymer material butyl rubber with a thickness of 0.5 mm, which can further improve the reliability of the component after packaging. The width of the reflective film 3 is 5 mm, and the application position and quantity can be adjusted according to the version of the photovoltaic component.

[0031] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A solar cell back panel glass, comprising a glass body (1), characterized in that: The glass body (1) is provided with a buffer layer (2) and a reflective film (3), wherein the reflective film (3) is provided on the glass body (1) or on the buffer layer (2); The outer side surface of the glass body (1) is bonded to the inner side surface of the buffer layer (2) via an adhesive layer (4), a weather-resistant layer (5) is provided on the outer side surface of the buffer layer (2), and a reflective film (3) is provided on the inner side surface of the glass body (1); or, the outer side surface of the glass body (1) is bonded to the inner side surface of the buffer layer (2) via an adhesive layer (4), a weather-resistant layer (5) is provided on the outer side surface of the buffer layer (2), and a reflective film (3) is provided on the inner side surface of the buffer layer (2); Alternatively, the inner side surface of the glass body (1) is bonded to the outer side surface of the buffer layer (2) via an adhesive layer (4), a coating layer (6) is provided on the outer side surface of the glass body (1), and the reflective film (3) is provided on the inner side surface of the glass body (1); or, the inner side surface of the glass body (1) is bonded to the outer side surface of the buffer layer (2) via an adhesive layer (4), a coating layer (6) is provided on the outer side surface of the glass body (1), and the reflective film (3) is provided on the inner side surface of the buffer layer (2).

2. The solar cell back panel glass according to claim 1, characterized in that: The glass body (1) has a thickness of 0.5-2.0 mm, the buffer layer (2) is made of a transparent polymer material, the buffer layer (2) has a thickness of 0.1-0.5 mm, the reflective film (3) has a width of 3-7 mm, and the weather-resistant layer (5) is made of a transparent fluorine film.

3. The solar cell back panel glass according to claim 1, characterized in that: The glass body (1) has a thickness of 0.5-2.0 mm, the buffer layer (2) is made of a transparent polymer material, the buffer layer (2) has a thickness of 0.1-0.5 mm, the reflective film (3) has a width of 3-7 mm, and the coating layer (6) is a high-transmittance anti-reflection film.

4. The solar cell back panel glass according to claim 1, characterized in that: The thickness of the adhesive layer (4) is 50-200 um, and the material of the adhesive layer (4) can be any one of acrylic pressure-sensitive adhesive, silicone resin adhesive, polyurethane resin adhesive, epoxy adhesive, ethylene-vinyl acetate copolymer or ethylene-polyolefin copolymer film.

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