CN204809236U - High efficiency photovoltaic module - Google Patents

Abstract

The utility model relates to a high-efficiency photovoltaic module, which comprises a cell for photoelectric conversion and a glass front plate and a back plate for encapsulating the cell, the glass front plate is located above the cell, the The back plate is located under the battery sheet, and the back plate is made of toughened glass, and one side surface of the back plate is also covered with a reflective function layer. In the high-efficiency photovoltaic module in the utility model, the back plate is made of toughened glass, which increases the pressure bearing pressure and effectively maintains the flatness of the battery sheet surface; one side surface of the back plate is also coated with a reflective functional layer, so that the light is Reflected back, it is used by the battery again, which greatly improves the utilization rate of the solar light by the battery.

Description

High Efficiency Photovoltaic Modules

technical field

The utility model belongs to the field of solar photovoltaic power generation, in particular to a high-efficiency photovoltaic module.

Background technique

Existing solar photovoltaic modules generally use TPT materials as solar back materials. This material has good weather resistance, excellent mechanical properties, ductility, aging resistance, corrosion resistance to many chemicals, and solvents, but it is easy to be used in photovoltaic module processes. Due to insufficient pressure during the process, more depressions will occur on the surface, causing the problem of uneven surface. As shown in Figure 1, for some double-glass photovoltaic modules, the glass on the back plate 1 is transparent or translucent, so that although the pressure is increased, the light (arrow in the figure) is directly transmitted from the back plate, so that the battery cannot be fully charged. Absorb the reflected light of the glass on the back plate 1, thereby affecting the output power of the photovoltaic module. Therefore, it is necessary to further improve the existing solar photovoltaic modules.

Contents of the invention

The technical problem to be solved by the utility model is to provide a high-efficiency photovoltaic module, which aims to solve the problems that the existing solar photovoltaic module is not sufficiently pressure-bearing, and the light is directly transmitted from the back plate, which affects the light utilization efficiency.

The utility model is achieved by providing a high-efficiency photovoltaic module, including a cell for photoelectric conversion and a glass front plate and a back plate for encapsulating the cell, the glass front plate is located on the cell Above, the back plate is located under the battery sheet, the back plate is made of tempered glass, and one side surface of the back plate is also covered with a reflective function layer.

Further, the high-efficiency photovoltaic module further includes a transparent EVA layer, and the EVA layer is filled between the glass front plate and the cell sheet and between the cell sheet and the back sheet.

Further, the reflective functional layer is an opaque diffuse reflective layer.

Further, the reflective functional layer covers a side of the back plate close to the battery sheet.

Further, the reflective functional layer is plated on the backplane by magnetron sputtering, or covered on the backplane in the form of a pasting film.

Further, the reflective functional layer is made of aluminum.

Compared with the prior art, the high-efficiency photovoltaic module in the utility model has a back plate made of tempered glass, which increases the pressure bearing strength and effectively maintains the flatness of the battery sheet surface; one side surface of the back plate is also covered with The reflective functional layer makes the light reflected back and is utilized again by the battery sheet, which greatly improves the utilization rate of the solar light by the battery sheet.

Description of drawings

Fig. 1 is a schematic side view of a photovoltaic module provided in the prior art.

Fig. 2 is a schematic perspective view of a high-efficiency photovoltaic module provided by an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structure diagram of the high-efficiency photovoltaic module in Fig. 2 .

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figures 2 and 3, it is a high-efficiency photovoltaic module of a preferred embodiment of the present invention, including a battery sheet 10 for photoelectric conversion, and a glass front plate 20 and a back glass for encapsulating the battery sheet. plate 30. The glass front plate 20 is located above the battery sheet 10, and the back plate 30 is located below the battery sheet 10. The back plate 30 is made of toughened glass, and one side surface is covered with a reflective function layer 40. The material of the reflective function layer 40 can be Aluminum and other reflective materials. In this embodiment, the back plate 30 plays a role of supporting the battery sheet 10 , and the reflection function layer 40 covers the side of the back plate 30 close to the battery sheet 10 .

Specifically, the high-efficiency photovoltaic module also includes a transparent EVA (ethylene-vinyl acetate copolymer) layer 50, and the EVA layer 50 is filled between the glass front plate 20 and the cell sheet 10 and between the cell sheet 10 and the back sheet 30. between. The EVA layer 50 is a polymer material, which acts as a buffer and protector for the battery sheet 10 .

In this embodiment, there are gaps 11 between the battery sheets 10, and the reflective function layer 40 is plated on the back plate 30 by magnetron sputtering, which is an opaque diffuse reflection layer, and the diffuse reflection can reflect light (such as (shown by the arrow in the figure) can be utilized again by the battery sheet 10 through the gap 11 while avoiding light pollution caused by light reflected by the specular surface. Of course, the reflective function layer 40 can also be pasted on the back plate 30 in the form of an opaque diffuse reflective film.

The reflective functional layer 40 may also cover the surface of the back plate 30 away from the battery sheet 10 .

To sum up, in the high-efficiency photovoltaic module of the present invention, the back plate 30 is made of tempered glass, which increases the bearing pressure and effectively maintains the flatness of the surface of the battery sheet 10; one side surface of the back plate 30 is also covered There is a reflective layer 40, so that the light is reflected back through the gap 11, and is utilized again by the battery sheet 10, so that the solar light utilization rate of the battery sheet 10 is greatly improved.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (6)

1. a high efficiency photovoltaic module, comprise for the cell piece of opto-electronic conversion and for the glass front plate that encapsulates described cell piece and backboard, described glass front plate is positioned at the top of described cell piece, described backboard is positioned at the below of described cell piece, described backboard is made up of toughened glass, it is characterized in that, a side surface of described backboard is also coated with reflective functional layer.

2. according to the high efficiency photovoltaic module described in claim 1, it is characterized in that, described high efficiency photovoltaic module also comprises transparent EVA layer, and described EVA layer is filled between described glass front plate and described cell piece and is filled between described cell piece and described backboard.

3. according to the high efficiency photovoltaic module described in claim 1, it is characterized in that, described reflective functional layer is lighttight diffuse reflector.

4. according to the high efficiency photovoltaic module described in claim 3, it is characterized in that, described reflective functional layer covers the side of described backboard near described cell piece.

5. according to the high efficiency photovoltaic module described in claim 3, it is characterized in that, described reflective functional layer is plated on described backboard by the mode of magnetron sputtering, or is covered on described backboard with pad pasting form.

6. the high efficiency photovoltaic module according to claim 1,3,4 or 5, is characterized in that, the material of described reflective functional layer is aluminium.