Solar cell backboard glass and solar cell module

Abstract

The invention provides solar cell backboard glass. The surface of the glass is provided with geometric structures arranged in an array structure. And in the geometric structures arranged in the array, the geometric structures in two adjacent rows are alternately arranged. The invention further provides a solar cell module. The surface of the solar cell backboard glass provided by the invention is provided with the geometric structures arranged in an array structure, and the geometric structures in two adjacent rows are arranged alternately, so that a microstructure in which the geometric structures are arranged in a staggered manner is formed, and the morphology can significantly enhance the uptake ability of the back surface of a double-glass assembly to weak reflected light and scattered light from the earth surface, and can improve the sensitivity of the double-glass assembly to weak reflected light and scattered light. Therefore, the power generation gain of back power generation on the double-sided double-glass solar cell is further optimized. The staggered arrangement type microstructure can enhance the convective heat transfer capability of the surface of the back plate glass of the solar cell by introducing local eddy current on the surface of the packaging glass, so that the temperature coefficient of the solar cell is reduced, and the working efficiency of a photovoltaic module is further enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of solar power generation, and particularly to a backsheet glass for a solar cell and a solar cell module. Background Art

[0002] At present, photovoltaic power generation modules (solar cell modules) are often encapsulated with tempered glass. To further enhance the sunlight absorption capacity of photovoltaic power generation modules, an embossing machine is often used to roll and form specific "pyramid"-shaped patterns on the surface of ultra-white glass, as Figure 1 shown. The "pyramid"-shaped surface topography can enhance the diffuse reflection ability of sunlight on the front side of the photovoltaic power generation module, thereby enhancing the sunlight absorption capacity of the photovoltaic power generation module.

[0003] At the present stage, during the back encapsulation process of double-sided double-glass modules, the same "pyramid"-shaped encapsulation glass as the front side is often used. However, the "pyramid"-shaped micro-topography has a weak ability to capture weak reflected light and scattered light from the ground, which will reduce the gain of the back power generation of the module to the overall power generation of the double-sided double-glass module. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a backsheet glass for a solar cell and a solar cell module. The backsheet glass for a solar cell provided by the present application has a large gain to the overall power generation of the double-sided double-glass module, and can further improve the working efficiency of the solar cell.

[0005] The present application provides a backsheet glass for a solar cell, and a geometric structure arranged in an array structure is provided on the surface of the glass;

[0006] In the geometric structure arranged in an array, the geometric structures in adjacent rows are arranged alternately.

[0007] In some specific implementation manners, the geometric structure is a protrusion or a groove.

[0008] In some specific implementation manners, the shape of the geometric structure is a pyramid structure or a triangular pyramid structure.

[0009] In some specific implementation manners, the geometric structures in the same row are arranged continuously.

[0010] In some specific implementation manners, the thickness of the backsheet glass for a solar cell is 2-5 mm.

[0011] In some specific implementation manners, the backsheet glass for a solar cell is tempered glass.

[0012] In some specific implementation manners, the light transmittance of the backsheet glass for a solar cell is more than 90%.

[0013] In some specific implementation manners, the wavelength range of the spectral response of the backsheet glass of the solar cell is 380 nm to 1100 nm.

[0014] This application also provides a solar cell module, including:

[0015] The backsheet glass of the solar cell as described in the above technical solution.

[0016] On the surface of the backsheet glass of the solar cell provided in this application, there are geometric structures arranged in an array structure. The geometric structures in adjacent rows are arranged alternately, that is, a microscopic morphology with staggered geometric structures is formed. This morphology can significantly enhance the ability of the back surface of the double-glass module to capture weak reflected light and scattered light from the ground, thereby further optimizing the power generation gain of the back surface power generation for the double-sided double-glass solar cell. In addition, the above-mentioned staggered arrangement type of microscopic morphology can enhance the convective heat transfer ability on the surface of the backsheet glass of the solar cell by introducing local "eddies" on the surface of the encapsulation glass, thereby reducing the temperature coefficient of the solar cell and further enhancing the working efficiency of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the structure schematic diagram of the solar cell backsheet provided by the present invention;

[0018] Figure 2 It is the front side view of the structure schematic diagram of the solar cell backsheet provided by the present invention;

[0019] Figure 3 It is the top view of the structure schematic diagram of the solar cell backsheet provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the photovoltaic backsheet glass provided by the present invention in conjunction with the embodiments.

[0021] This application provides a backsheet glass of a solar cell, and geometric structures arranged in an array structure are provided on the surface of the glass;

[0022] In the geometric structures arranged in an array, the geometric structures in adjacent rows are arranged alternately.

[0023] See Figure 1 , Figure 2 and Figure 3 , Figure 1 is the front view of the structure schematic diagram of the solar cell backsheet provided by the present invention, Figure 2 is the front side view of the structure schematic diagram of the solar cell backsheet provided by the present invention, Figure 3 is the top view of the structure schematic diagram of the solar cell backsheet provided by the present invention, where 11 is the geometric structure of the nth row and 12 is the geometric structure of the (n + 1)th row.

[0024] The solar cell backplane glass provided by this application is tempered glass with a thickness of 4 mm, its light transmittance is above 90%, and the wavelength range of the spectral response is 380 nm to 1100 nm. The surface of this glass is provided with pyramid-shaped grooves arranged in an array structure. Those skilled in the art can understand that the array structure refers to a structure formed by arranging multiple rows and multiple columns. In this application, in the pyramid-shaped grooves arranged in an array, the pyramid-shaped grooves in adjacent rows are arranged alternately. As Figure 1 , Figure 2 and Figure 3 shown, the alternate arrangement of the pyramid-shaped grooves in adjacent rows means that the pyramid-shaped depression in the nth row and the jth column is located between the two pyramid-shaped grooves in the (n + 1)th row and the (j + 1)th column and the (n + 1)th row and the (j - 1)th column, strengthening the convective heat transfer on the surface of the tempered glass and realizing the double synergy of light absorption and heat dissipation. The experimental results show that after encapsulating a photovoltaic module with the above backplane glass and placing it in an environment with an ambient temperature of 25 °C, the average temperature of the backplane glass is: 26.2 °C; while using commercial photovoltaic glass to encapsulate the same module, the average temperature of the backplane glass is: 27.2 °C.

[0025] In other implementation manners, the geometric structure can also be a protrusion. In other implementation manners, the geometric structure can also be a triangular pyramid structure.

[0026] In some specific implementation manners, the pyramid-shaped grooves in the same row are arranged continuously, that is, the distance between the bottoms of adjacent pyramid-shaped grooves is small.

[0027] This application also provides a solar cell module, including:

[0028] The solar cell backplane glass described in the above technical solution.

[0029] Specifically, the solar cell module includes a surface tempered glass, an adhesive layer, a photovoltaic material layer, a transparent encapsulant layer, and the backplane glass described in the above solution that are sequentially compounded. This application has no special restrictions on the surface tempered glass, and low-iron tempered embossed glass well-known to those skilled in the art can be used. This application has no special restrictions on the adhesive layer, and it is only necessary to bond the photovoltaic material layer to the surface tempered glass. This application has no special restrictions on the photovoltaic material layer, and materials well-known to those skilled in the art that can be used as solar cell modules can be used. This application has no special restrictions on the transparent encapsulant layer, and commonly used encapsulation adhesives in the art can be used.

[0030] The surface of the backsheet glass of the present application is provided with geometric structures arranged in an array structure, and the geometric structures in adjacent rows are arranged alternately, that is, a microscopic morphology with staggered geometric structures is formed. This morphology can significantly enhance the ability of the back surface of the double-glass module to capture weak reflected light and scattered light from the ground, thereby further optimizing the power generation gain of the back surface power generation for the double-sided double-glass solar cell. In addition, the above-mentioned staggered microscopic morphology can enhance the convective heat transfer ability of the surface of the backsheet glass of the solar cell by introducing local "eddies" on the surface of the encapsulation glass, thereby reducing the temperature coefficient of the solar cell and further enhancing the working efficiency of the photovoltaic module.

[0031] As mentioned above, the above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A backsheet glass for a solar cell, characterized in that, The glass surface is provided with geometric structures arranged in an array structure; In the geometric structures arranged in an array, the geometric structures in adjacent rows are arranged alternately.

2. The backsheet glass for a solar cell according to claim 1, wherein The geometric structures are protrusions or grooves.

3. The solar cell backplane glass according to claim 2, characterized in that, The shape of the geometric structures is a pyramid structure or a triangular pyramid structure.

4. The solar cell backplane glass according to claim 1, wherein The geometric structures in the same row are arranged continuously.

5. The backsheet glass for a solar cell according to any one of claims 1 to 4, characterized in that Its thickness is 2 to 5 mm.

6. The solar cell backplane glass according to claim 5, characterized in that, It is tempered glass.

7. The solar cell backplane glass according to claim 6, wherein Its light transmittance is more than 90%.

8. The solar cell backplane glass according to claim 7, wherein, The wavelength range of its spectral response is 380 nm to 1100 nm.

9. A solar cell module, characterized in that, Comprising: The solar cell backplane glass according to any one of claims 1 to 8.

Images