CN206806341U - A kind of reflective photovoltaic module - Google Patents

Abstract

The application discloses a reflective photovoltaic module, which includes a cover plate, a front adhesive film layer, a battery sheet, a rear adhesive film layer and a back plate arranged in sequence, and the rear adhesive film layer includes an upper adhesive film layer, a reflective film layer and a lower adhesive film layer. film layer. The utility model adopts the rear adhesive film layer provided with a reflective film layer to reflect the light irradiated on the battery sheet gap to the surface of the battery sheet, which increases the reflection of the photovoltaic module gap, improves the power of the photovoltaic module, and the stacking sequence is different from the conventional one. The components are the same, which improves the packaging efficiency of photovoltaic modules. At the same time, due to the setting of the reflective film layer, the ultraviolet light is reflected before reaching the back plate, which effectively prevents the damage of ultraviolet rays to the back plate and effectively prolongs the life of photovoltaic modules.

Description

A reflective photovoltaic module

technical field

The utility model relates to the technical field of photovoltaics, in particular to a reflective photovoltaic assembly.

Background technique

Solar photovoltaic power generation refers to the technology of directly converting light energy into electric energy by using the photovoltaic effect of the PN junction interface of crystalline silicon semiconductor. Photovoltaic module refers to a power generation device that connects multiple batteries in series and then cooperates with a power controller. The tempered glass, the front adhesive film layer, the battery sheet, the rear adhesive film layer, and the back plate are stacked in sequence and then laminated and packaged. At present, the distance between each cell layer of a solar module is 2-5mm, and the gap area between the cells accounts for about 10% of the overall area of the module.

At present, in the existing photovoltaic module technology, the gaps between conventional module cells have not been utilized. When sunlight enters the module, it mainly produces diffuse reflection through the back plate, which has little effect on improving the power of the module. The reflective film layer is embedded in the module package and laid in the gap above the battery sheet, which is prone to displacement difference and causes the battery sheet to be blocked, and the difficulty of stacking increases, which increases the difficulty of component packaging and reduces the stacking efficiency. During the long-term use of conventional modules, ultraviolet rays can easily pass through the glass EVA to reach the backplane, and the backplane is prone to aging and embrittlement, which reduces the life of photovoltaic modules.

Therefore, how to improve the light utilization of photovoltaic modules, reduce the difficulty of stacking, improve the packaging efficiency of modules, and improve the life of photovoltaic modules is a technical problem urgently needed to be solved by those skilled in the art.

Utility model content

In order to solve the above technical problems, the utility model provides a reflective photovoltaic module, which improves the light utilization of the photovoltaic module, reduces the difficulty of stacking, improves the packaging efficiency of the module, and prolongs the life of the photovoltaic module.

In order to achieve the above object, the utility model provides the following technical solutions:

A reflective photovoltaic module, comprising a cover plate, a front adhesive film layer, a battery sheet, a rear adhesive film layer and a back plate arranged in sequence, and the rear adhesive film layer includes an upper adhesive film layer, a reflective film layer and a lower adhesive film layer.

Preferably, in the above-mentioned reflective photovoltaic module, the reflective film layer is a reflective film layer with protrusions distributed on the surface.

Preferably, in the above-mentioned reflective photovoltaic module, the protrusions are serrated protrusions.

Preferably, in the above-mentioned reflective photovoltaic module, the included angle between the serrated protrusion and the upper adhesive film layer or the lower adhesive film layer ranges from 0 to 45 degrees.

Preferably, in the above-mentioned reflective photovoltaic module, the protrusions are hemispherical protrusions.

Preferably, in the above-mentioned reflective photovoltaic module, the upper adhesive film layer or the lower adhesive film layer is an EVA adhesive film, and its thickness ranges from 0.2 to 0.3 mm.

Preferably, in the above-mentioned reflective photovoltaic module, the thickness of the reflective film layer is in the range of 0.1-0.3 mm.

It can be seen from the above technical solution that a reflective photovoltaic module provided by the utility model includes a cover plate, a front adhesive film layer, a battery sheet, a rear adhesive film layer and a back plate arranged in sequence, and the rear adhesive film layer includes An upper adhesive film layer, a reflective film layer and a lower adhesive film layer. The utility model adopts the rear adhesive film layer provided with a reflective film layer to reflect the light irradiated in the cell gap to the surface of the cell, which increases the reflection in the gap of the photovoltaic module and improves the power of the photovoltaic module, and the stacking sequence is different from the conventional The components are the same, which improves the packaging efficiency of photovoltaic modules. At the same time, due to the setting of the reflective film layer, the ultraviolet light is reflected before reaching the back plate, which effectively prevents the damage of ultraviolet rays to the back plate and effectively prolongs the life of photovoltaic modules.

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 accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is a kind of structure schematic diagram of back adhesive film layer that the utility model embodiment provides;

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

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a back adhesive film layer provided by an embodiment of the utility model; FIG. 2 is a schematic structural diagram of a photovoltaic module provided by an embodiment of the utility model.

In a specific embodiment, a reflective photovoltaic module is provided, including a cover plate 1, a front adhesive film layer 2, a battery sheet 3, a rear adhesive film layer 4, and a back plate 5 arranged in sequence, and the rear adhesive film layer 4 includes an upper adhesive film layer 41, a reflective film layer 42 and a lower adhesive film layer 43.

Wherein, the cover plate 1 can be tempered glass, which is not specifically limited, and the front adhesive film layer 2 can be an EVA adhesive film layer or other types of adhesive film layers, all of which are within the scope of protection. The battery slices 3 are evenly arranged, and there are gaps between the battery slices 3 . The back adhesive film layer 4 arranged on the back of the battery sheet 3 is made into a composite layer provided with a reflective film layer 42, the upper adhesive film layer 41 is used for bonding with the battery sheet 3, and the reflective film layer 42 is used for directing the light incident to the photovoltaic module The surface, especially the light incident on the gap between the battery sheets 3 is reflected into the battery sheet 3 again, the lower adhesive film layer 43 is used for bonding with the back plate 5, and the rear adhesive film layer 4 is prepared as the upper adhesive film layer 41. The composite layer of the reflective film layer 42 and the lower adhesive film layer 43. The reflection of the photovoltaic module gap is increased, the power of the photovoltaic module is improved, and the stacking sequence is the same as that of the conventional module, which improves the packaging efficiency of the photovoltaic module. It is reflected before, effectively prevents the damage of ultraviolet rays to the back plate 5, and effectively prolongs the service life of the photovoltaic module.

On the basis of the above-mentioned reflective photovoltaic module, the reflective film layer 42 is a reflective film layer 42 with protrusions distributed on the surface.

Among them, for the convenience of preparation, the surface of the film layer is covered with protrusions to form a reflective film layer 42 covered with protrusions. The protrusions play the role of reflecting light. The corresponding positions are distributed with protrusions, all of which are within the protection range.

Further, the protrusions are serrated protrusions.

Wherein, the shape of the protrusion can be set according to requirements, including but not limited to a saw-toothed protrusion, hemispherical shape, wave shape, etc., all of which are within the scope of protection.

Further, in the above-mentioned reflective photovoltaic module, the included angle between the serrated protrusion and the upper adhesive film layer 41 or the lower adhesive film layer 43 ranges from 0 to 45 degrees.

Wherein, the saw-tooth-shaped protrusion is in the shape of a cone, and the angle between the side of the cone and the upper film layer 41 or the lower film layer 43 ranges from 0 to 45 degrees. In this angle range, more light is incident on the battery. In sheet 3, the utilization rate of light is improved, thereby increasing the output power of the photovoltaic module.

Further, in the above-mentioned reflective photovoltaic module, the protrusions are hemispherical protrusions.

Wherein, the hemispherical protrusions can also reflect light to the battery sheet 3, so that the battery sheet 3 absorbs light, which improves the utilization rate of light, thereby increasing the output power of the photovoltaic module.

On the basis of the above-mentioned reflective photovoltaic module, the upper adhesive film layer 41 and/or the lower adhesive film layer 43 is an EVA adhesive film with a thickness ranging from 0.2 to 0.3 mm.

Wherein, EVA adhesive film is ethylene-vinyl acetate copolymer, high transparency, high adhesive force can be applicable to various interface, comprise glass, metal and plastics such as PET, upper adhesive film layer 41 and lower adhesive film layer 43 can be EVA The adhesive film, the upper adhesive film layer 41 or the lower adhesive film layer 43 can be EVA adhesive film or other types of adhesive films, all within the scope of protection.

On the basis of the above-mentioned reflective photovoltaic module, the thickness of the reflective film layer 42 is 0.1-0.3 mm.

It should be pointed out that the thickness of the reflective film layer 42 includes but is not limited to the above-mentioned range, which is set according to actual needs and is within the protection range.

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 enables those skilled in the art to realize or use the utility model. 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 these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. A reflective photovoltaic module, comprising a cover plate, a front adhesive film layer, a cell sheet, a rear adhesive film layer and a back plate arranged in sequence, it is characterized in that the rear adhesive film layer comprises an upper adhesive film layer, a reflective film layer and the lower film layer. 2. The reflective photovoltaic module according to claim 1, wherein the reflective film layer is a reflective film layer with protrusions distributed on the surface. 3. The reflective photovoltaic module according to claim 2, wherein the protrusions are serrated protrusions. 4 . The reflective photovoltaic module according to claim 3 , wherein the included angle between the serrated protrusion and the upper adhesive film layer or the lower adhesive film layer ranges from 0 to 45 degrees. 5. The reflective photovoltaic module according to claim 2, wherein the protrusion is a hemispherical protrusion. 6. The reflective photovoltaic module according to any one of claims 1 to 5, characterized in that, the upper adhesive film layer and/or the lower adhesive film layer are EVA adhesive films with a thickness ranging from 0.2 to 0.3 mm . 7 . The reflective photovoltaic module according to claim 6 , wherein the thickness of the reflective film layer ranges from 0.1 to 0.3 mm.