CN108010977A - A kind of photovoltaic module - Google Patents

Abstract

The present application discloses a photovoltaic module, which includes stacked glass and a back plate, and a plurality of battery sheets are arranged between the glass and the back plate, and there is a gap between the edges of the adjacent battery sheets, and the gap A reflective layer is arranged in the middle, and the reflective surface of the reflective layer faces the glass. The sunlight irradiates on the photovoltaic module and the light on the gap, under the reflection of the reflective layer located in the gap, the light is reflected on the glass, and then is reflected by the glass twice, and returns to the cell. Therefore, this part of the light It is collected by the battery sheet, which improves the light receiving efficiency of the photovoltaic module, increases the output power of the photovoltaic module, and will not be absorbed or transmitted by the back plate, thereby avoiding the back plate absorbing sunlight and heating up, and improving the use of photovoltaic modules life.

Description

A photovoltaic module

technical field

The invention relates to the technical field of solar power generation, in particular to a photovoltaic module.

Background technique

A photovoltaic module is a power generation module that uses sunlight to generate electricity. A photovoltaic module is obtained by connecting multiple single solar cells in series or in parallel and packaging them. Photovoltaic modules usually include glass, encapsulation material, cell sheet, encapsulation material and back sheet from top to bottom. After these materials are pressed together, they are encapsulated by a frame around them.

Since multiple solar cells in each photovoltaic module are arranged in a matrix and tiled between the glass and the back plate, there are gaps between adjacent solar cells, and the positions corresponding to the upper and lower positions of the back plate are exposed, and the sunlight irradiates the photovoltaic When the module is installed, part of the light is irradiated on the backplane through the gap between the cells, and this part of the light is absorbed or penetrated by the backplane, resulting in an increase in the temperature of the photovoltaic module and waste of light, which affects the service life of the photovoltaic module and efficiency.

To sum up, how to solve the problem that the backplane absorbs light between the gaps of the cells, causing the temperature of the photovoltaic module to rise and the light to be wasted has become an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of this, the object of the present invention is to provide a photovoltaic module to improve the service life and light-receiving efficiency of the photovoltaic module.

To achieve the above object, the present invention provides the following technical solutions:

A photovoltaic module, comprising stacked glass and a back plate, a plurality of battery sheets are arranged between the glass and the back plate, and there are gaps between the edges of the adjacent battery sheets, and reflective light is arranged in the gap layer, the reflective surface of the reflective layer faces the glass.

Preferably, in the above photovoltaic module, the reflective layer is an aluminum foil reflective layer or a silver reflective layer.

Preferably, in the above photovoltaic module, the reflective layer is adhesively fixed on the back plate.

Preferably, in the above-mentioned photovoltaic module, the reflective layer is bonded and fixed on the backplane by an EVA adhesive film.

Preferably, in the above photovoltaic module, the reflective layer is a reflective film coated on the back plate.

Preferably, in the above-mentioned photovoltaic module, a circle of reflective ring edges located between the glass and the cells and inclined to the glass is arranged on the inner side of the frame of the photovoltaic module, and the reflective surface of the reflective ring faces toward the lower surface of the glass.

Preferably, in the above photovoltaic module, the reflective surface of the reflective ring is flat or concave.

Preferably, in the above photovoltaic module, the inclination angle between the reflective surface of the reflective ring and the glass is 30°-80°.

Preferably, in the photovoltaic module mentioned above, the frame is an aluminum frame.

Compared with prior art, the beneficial effect of the present invention is:

In the photovoltaic module provided by the present invention, a plurality of battery sheets are laid flat between the glass and the back plate, and there are gaps between the edges of adjacent battery sheets, and a light-reflecting layer is arranged in the gap, and the light-reflecting surface of the light-reflecting layer faces the glass. After such setting, the sunlight irradiates on the photovoltaic module, and the light irradiated on the gap, under the reflection of the reflective layer located in the gap, the light is reflected on the glass, and then returns to the cell after secondary reflection by the glass, so , this part of the light is collected by the battery sheet, which improves the light receiving efficiency of the photovoltaic module and increases the output power of the photovoltaic module. And this part of the light will not be irradiated to the back plate and be absorbed or transmitted by the back plate, thereby avoiding the heat-up caused by the back plate absorbing sunlight, and improving the service life of the photovoltaic module.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a schematic structural diagram of a photovoltaic module provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a frame of a photovoltaic module provided by an embodiment of the present invention.

Among them, 1 is glass, 2 is battery sheet, 21 is gap, 3 is back plate, 4 is reflective layer, 5 is frame, 51 is reflective ring edge.

Detailed ways

The core of the present invention is to provide a photovoltaic component to improve the service life and light-receiving efficiency of the photovoltaic component.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1, the embodiment of the present invention provides a photovoltaic module, including glass 1, upper encapsulation material layer, cell sheet 2, lower encapsulation material layer and back plate 3 stacked in order from top to bottom, the encapsulation material layer is used In order to bond and fix the upper and lower adjacent parts, the number of battery sheets 2 is multiple, and they are spread between the glass 1 and the back plate 3, preferably in a matrix between the glass 1 and the back plate 3, through the upper and lower two Layers of encapsulation material are packaged and fixed. The surroundings of the photovoltaic module are encapsulated with a frame 5. There is a gap 21 between the edges of adjacent battery sheets 2. The gap 21 includes a sheet gap and a string gap. A reflective layer 4 is arranged in the gap 21. The reflective layer The reflective surface of 4 faces glass 1.

The working principle of the photovoltaic module is: sunlight irradiates the photovoltaic module, and part of the light irradiates on the gap 21. Since the reflective layer 4 is arranged in the gap 21, this part of the light is reflected by the reflective layer 4 onto the glass 1, and the light is then After being reflected twice by the glass 1, it returns to the battery sheet 2. Therefore, this part of the light is collected by the battery sheet 2, and the sunlight irradiated into the gap 21 is used to improve the light receiving efficiency of the photovoltaic module and increase the output of the photovoltaic module. Power, and this part of the light will not irradiate the back plate 3 and be absorbed or transmitted by the back plate 3, thereby avoiding the back plate 3 absorbing sunlight and heating up, and improving the service life of the photovoltaic module.

Further, in this embodiment, the reflective layer 4 is an aluminum foil reflective layer or a silver reflective layer. The aluminum foil reflective layer and the silver reflective layer have high reflectivity, which can further improve the utilization rate of sunlight. Of course, the reflective layer 4 can also be made of other materials with high reflectivity, and is not limited to the materials listed in this embodiment.

In this embodiment, the reflective layer 4 is adhesively fixed on the upper surface of the back plate 3 , and the reflective layer 4 is a separate component, and its back is adhesively fixed on the back plate 3 . Specifically, the reflective layer 4 is bonded and fixed on the backplane 3 through the lower packaging material layer, and the lower packaging material layer is preferably an EVA adhesive film. Certainly, the light-reflecting layer 4 can also be fixed by other adhesives, and the lower encapsulation material layer is slotted at the position corresponding to the gap 21 to expose the backplane 3, and the light-reflecting layer 4 is adhered to the backplane 3 by the adhesive.

In addition to the reflective layer 4 being fixed by bonding, the reflective layer 4 can also be a reflective film coated on the back plate 3, that is, the coated material itself has reflective properties, and the reflective film can be formed by spraying or brushing. The material layer is grooved at the position corresponding to the gap 21 to expose the back plate 3 , and the reflective film is sprayed or brushed on the back plate 3 . As long as the reflective layer 4 can be formed in the gap 21 , it is not limited to the fixing and molding forms listed in this embodiment.

As shown in FIG. 2 , the inner side of the frame 5 of the photovoltaic module is provided with a ring of reflective rings 51 located between the glass 1 and the battery sheet 2 and inclined to the glass 1 . The reflective surface of the reflective ring 51 faces the lower surface of the glass 1 . By setting the reflective ring edge 51 on the inner side of the frame 5, the light irradiated on the frame 5 can be reflected to the lower surface of the glass 1, and then reflected to the battery sheet 2 through the second reflection of the glass 1, which further improves the sunlight intensity. usage efficiency.

Further, in this embodiment, the reflective surface of the reflective ring 51 is flat or concave, as long as the light can be reflected to the battery sheet 2 twice, it is not limited to the shapes listed in this embodiment.

Preferably, the inclination angle between the reflective surface of the reflective ring 51 and the glass 1 is 30°-80°, more preferably 45°, and the reflected light can be better collected by setting an appropriate angle of the reflective surface.

Further, in this embodiment, the frame 5 is an aluminum frame, which is light in weight, and the reflective surface formed by the aluminum frame has a high reflectivity. Of course, the frame 5 can also be made of other materials, such as aluminum alloy, stainless steel and so on.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A photovoltaic module, comprising stacked glass (1) and a back plate (3), a plurality of battery sheets (2) are tiled between the glass (1) and the back plate (3), adjacent to each other There are gaps (21) between the edges of the battery sheets (2), and it is characterized in that a reflective layer (4) is arranged in the gap (21), and the reflective surface of the reflective layer (4) faces the glass ( 1). 2. The photovoltaic module according to claim 1, characterized in that the reflective layer (4) is an aluminum foil reflective layer or a silver reflective layer. 3. The photovoltaic module according to claim 1, characterized in that, the reflective layer (4) is adhesively fixed on the back plate (3). 4. The photovoltaic module according to claim 3, characterized in that, the reflective layer (4) is bonded and fixed on the back plate (3) by an EVA adhesive film. 5. The photovoltaic module according to claim 1, characterized in that, the reflective layer (4) is a reflective film coated on the back plate (3). 6. The photovoltaic module according to any one of claims 1-5, characterized in that, the inner side of the frame (5) of the photovoltaic module is provided with a circle between the glass (1) and the cell (2) And it is inclined to the reflective ring edge (51) of the glass (1), and the reflective surface of the reflective ring edge (51) faces the lower surface of the glass (1). 7. The photovoltaic module according to claim 6, characterized in that, the reflective surface of the reflective ring (51) is a plane or a concave surface. 8. The photovoltaic module according to claim 7, characterized in that, the inclination angle between the reflective surface of the reflective ring (51) and the glass (1) is 30°-80°. 9. The photovoltaic module according to claim 6, characterized in that, the frame (5) is an aluminum frame.