CN210897309U

CN210897309U - Photovoltaic module

Info

Publication number: CN210897309U
Application number: CN201922321013.XU
Authority: CN
Inventors: 黄甫阳; 董经兵; 潘秀娟
Original assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Current assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc; CSI Solar Technologies Inc
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-06-30
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a photovoltaic module, which comprises a transparent cover plate, an upper packaging adhesive film, a plurality of photovoltaic cell pieces and a lower packaging adhesive film, wherein the lower packaging adhesive film is latticed and is provided with a plurality of light transmission areas arranged at intervals and a light reflection area connected with the light transmission areas, the light transmission areas are filled with transparent adhesive films, and the light reflection areas are filled with white adhesive films; based on the utility model provides a photovoltaic module's concrete structure shines the upper surface that photovoltaic cell piece can be reachd after the reflection of short distance to the light in clearance between the adjacent photovoltaic cell piece of photovoltaic module, so can improve photovoltaic module's positive power to a certain extent.

Description

Photovoltaic module

Technical Field

The utility model relates to a photovoltaic field especially relates to a photovoltaic module.

Background

Photovoltaic power generation is clean energy which accords with green development, is an important development direction of energy transformation, and plays an important role in the energy revolution. A double-sided assembly in photovoltaic power generation is a technology with a great prospect in the photovoltaic industry, a photovoltaic cell used by the double-sided assembly has the characteristic of front-side and back-side power generation, and a transparent back plate with high light transmittance is generally adopted in the packaging of the double-sided assembly, so that the maximization of the power generation of the double-sided assembly is realized.

In order to improve the front power of the double-sided assembly, in the prior art, the back plate is usually provided with a white coating at a gap position between the photovoltaic cell pieces, so that light rays of the double-sided assembly, which are irradiated from the front side to the white coating of the back plate, can reach the front side of the photovoltaic cell pieces through reflection, and further the front power of the double-sided assembly is improved. Particularly, the light irradiated to the white coating from the front side of the double-sided assembly needs to completely penetrate through the two layers of packaging adhesive films on the upper side of the back plate before irradiating the white coating and after being reflected by the white coating, and then the light is reflected to the front side of the photovoltaic cell piece through the cover plate of the double-sided assembly.

In view of the above, there is a need to provide an improved solution to the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that prior art exists at least, for realizing the utility model purpose of the aforesaid, the utility model provides a photovoltaic module, its concrete design mode as follows.

The utility model provides a photovoltaic module, includes transparent cover, upper encapsulation glued membrane, a plurality of photovoltaic cell piece and lower floor's encapsulation glued membrane, lower floor's encapsulation glued membrane is latticed, and it has the printing opacity district that a plurality of intervals set up and connects the reflection of light district in a plurality of printing opacity districts, the printing opacity is distinguished the intussuseption and is filled with the cellophane, reflection of light district intussuseption is filled with white glued membrane.

Furthermore, the photovoltaic module is also provided with a back plate which is arranged on one side of the lower packaging adhesive film, which is far away from the photovoltaic cell piece.

Further, the lower layer of packaging adhesive film is integrally formed on the inner surface of the back plate, and the thicknesses of the transparent adhesive film in the light transmitting area and the white adhesive film in the light reflecting area are equal.

Furthermore, the thickness range of the transparent adhesive film of the light-transmitting area and the white adhesive film of the light-reflecting area is 300-800 μm.

Further, the transparent adhesive film is a transparent EVA film layer or a transparent POE film layer, and the white adhesive film is a white EVA film layer or a white POE film layer.

Further, the back plate comprises a transparent substrate integrally connected with the lower packaging adhesive film and a fluorine-containing film layer formed on the outer surface of the transparent substrate.

Further, the transparent substrate is a PET plate or a PA plate.

Further, the thickness of the transparent substrate is 100-400 μm.

Further, the thickness of the fluorine-containing film layer is 10-40 μm.

Further, the back plate is a glass plate.

The utility model has the advantages that: based on the utility model provides a photovoltaic module's concrete structure shines the upper surface that photovoltaic cell piece can be reachd after the reflection of short distance to the light in clearance between the adjacent photovoltaic cell piece of photovoltaic module, so can improve photovoltaic module's positive power to a certain extent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic front view illustrating the cooperation between a lower-layer packaging adhesive film and a back plate according to the present invention;

FIG. 2 is a schematic cross-sectional view of the back plate of FIG. 1 at position A-A';

FIG. 3 is another schematic cross-sectional view of the back plate of FIG. 1 at position A-A';

fig. 4 is a schematic cross-sectional view of a photovoltaic module according to the present invention.

In the figure, 100 is a back plate, 11 is a transparent substrate, 12 is a fluorine-containing film layer, 200 is a lower-layer encapsulation film, 21 is a light-transmitting region, 22 is a light-reflecting region, 300 is a photovoltaic cell, 400 is an upper-layer encapsulation film, and 500 is a transparent cover plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 4, the photovoltaic module of the present invention includes a transparent cover 500, an upper packaging film 400, a plurality of photovoltaic cells 300, and a lower packaging film 200.

With reference to fig. 1 and 2 or fig. 1 and 3, the lower-layer encapsulation adhesive film 200 of the present invention is in a grid shape, and has a plurality of light-transmitting regions 21 arranged at intervals and a light-reflecting region 22 connected to the light-transmitting regions 21, wherein the light-transmitting regions 21 are filled with transparent adhesive films, and the light-reflecting regions 22 are filled with white adhesive films.

More specifically, it is shown in combination with fig. 4, the utility model provides a photovoltaic module is two-sided subassembly, when carrying out the photovoltaic module encapsulation, the position of photovoltaic cell piece 300 and the light zone 21 position phase-match of lower floor's encapsulation glued membrane 200, and the edge of photovoltaic cell piece extends to reflection of light district 22, the marginal position phase-match of reflection of light district 22 and photovoltaic cell piece 300 promptly. In the lamination process of the photovoltaic module package, the upper package adhesive film 400 and the lower package adhesive film 200 are heated, cross-linked and cured, thereby completing the packaging process.

Based on the above-described structure, it is easy to understand that, in the application scenario of a specific photovoltaic module, the light irradiated from the front side of the photovoltaic module to the gap between the photovoltaic cell 300 directly irradiates the reflective area 22, and is reflected by the reflective area 22 toward the cover plate 500, and further reflected toward the upper surface of the photovoltaic cell 300, in this process, the reflected light does not need to penetrate through the lower-layer encapsulation adhesive film 200, and can reach the upper surface of the photovoltaic cell 300 through the reflection at a short distance, so that the illumination utilization rate of the front side of the photovoltaic module can be improved, and the front power of the photovoltaic module can be improved to a certain extent.

Referring to fig. 4, the photovoltaic module of the present invention further has a back plate 100 disposed on one side of the lower packaging adhesive film 200 away from the photovoltaic cell 300.

In the specific implementation process, as shown in fig. 2 or fig. 3, the lower encapsulant film 200 is integrally formed on the inner surface (i.e., the upper surface) of the back plate 100, and the thicknesses of the transparent film in the light-transmitting region 21 and the white film in the light-reflecting region 22 are equal. As a preferred embodiment of the present invention, the thickness range of the transparent adhesive film of the transparent region 21 and the white adhesive film of the reflective region 22 is 300 μm-800 μm.

Because the utility model discloses well lower floor's encapsulation glued membrane 200 and backplate 100 integrated into one piece can simplify photovoltaic module's processing procedure technology in concrete photovoltaic module assembling process, improve production efficiency.

Further, the utility model discloses in related transparent adhesive film be transparent EVA rete or transparent POE rete, white glued membrane is white EVA rete or white POE rete.

The utility model discloses in, lower floor's encapsulation glued membrane 200 is through the curtain coating shaping, and in the concrete implementation process, the reflection of light district 22 of lower floor's encapsulation glued membrane 200 is realized through white coating such as adding titanium white powder in the manufacturing process or other coatings that can realize reflecting light. It is to be understood that in some implementations, the color of the coating may not be limited to white.

Referring to fig. 2 and 4, the back sheet 100 according to the present embodiment includes a transparent substrate 11 integrally connected to a lower adhesive packaging film 200, and a fluorine-containing film layer 12 formed on an outer surface (i.e., a lower surface) of the transparent substrate 11.

Preferably, the transparent substrate according to the present embodiment is a PET plate or a PA plate. Of course, it is understood that in other embodiments of the present invention, the transparent substrate may be made of other materials with anti-aging performance, water-blocking performance, mechanical strength, transparency, etc. that can satisfy the requirement of the dual-sided assembly package.

The fluorine-containing film layer 12 in the embodiment can prevent ultraviolet rays in sunlight from damaging the double-sided assembly, and particularly can prevent the transparent substrate from being rapidly aged. In some implementations, the thickness of the layer of fluorine-containing material film 101 is 10 μm to 40 μm.

Referring to fig. 3, in another embodiment of the present invention, the transparent substrate 100 is configured as a transparent glass plate. The thickness of the transparent glass plate is generally in the range of 1.5mm to 5 mm.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a photovoltaic module, includes transparent cover, upper encapsulation glued membrane, a plurality of photovoltaic cell piece and lower floor's encapsulation glued membrane, its characterized in that, lower floor's encapsulation glued membrane is latticed, and it has the printing opacity district that a plurality of intervals set up and connects the reflection of light district of a plurality of printing opacity districts, the intussuseption of printing opacity district is filled with transparent adhesive film, the intussuseption of reflection of light district is filled with white glued membrane.

2. The photovoltaic module of claim 1, further comprising a back sheet disposed on a side of the lower encapsulant film away from the photovoltaic cell sheet.

3. The photovoltaic module of claim 2, wherein the lower encapsulant film is integrally formed on the inner surface of the back plate, and the transparent film of the light-transmitting region and the white film of the light-reflecting region have the same thickness.

4. The photovoltaic module of claim 3, wherein the transparent adhesive film of the light-transmitting region and the white adhesive film of the light-reflecting region have a thickness in a range of 300 μm to 800 μm.

5. The photovoltaic module according to any one of claims 1 to 4, wherein the transparent adhesive film is a transparent EVA film or a transparent POE film, and the white adhesive film is a white EVA film or a white POE film.

6. The photovoltaic module according to any one of claims 2 to 4, wherein the back sheet comprises a transparent substrate integrally connected to the lower encapsulant film and a fluorine-containing film layer formed on an outer surface of the transparent substrate.

7. The photovoltaic module of claim 6, wherein the transparent substrate is a PET or PA sheet.

8. The photovoltaic module of claim 6, wherein the transparent substrate has a thickness of 100-400 μ ι η.

9. The photovoltaic module of claim 6, wherein the fluorine-containing film layer has a thickness of 10 μm to 40 μm.

10. The photovoltaic module of any of claims 2-4 wherein the backsheet is a glass sheet.