CN212967728U

CN212967728U - Photovoltaic module with good backboard light acceptance rate

Info

Publication number: CN212967728U
Application number: CN202022227486.6U
Authority: CN
Inventors: 陈燕平; 林俊良; 李清波; 林金锡; 林金汉
Original assignee: Changzhou Almaden Co Ltd
Current assignee: Changzhou Almaden Co Ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-04-13
Anticipated expiration: 2030-10-09

Abstract

The utility model discloses a photovoltaic module with good backplate photic rate, including positive photovoltaic glass, back photovoltaic glass, a plurality of battery pieces, reflector layer and antireflection coating, back photovoltaic glass sets up with positive photovoltaic glass relatively, back photovoltaic glass's surface is equipped with the knurling face, a plurality of battery pieces are array distribution and locate between positive photovoltaic glass and the back photovoltaic glass, the clearance has between the adjacent battery piece, back photovoltaic glass surface is located to the reflector layer, and the reflector layer is located the position of clearance at back photovoltaic glass surface orthographic projection, the surface of reflector layer is located to the antireflection coating, and the antireflection coating covers whole back photovoltaic glass's surface. The photovoltaic module with the good backboard light receiving rate has the advantages of being simple in structure, effectively improving the backboard light receiving rate and the like.

Description

Photovoltaic module with good backboard light acceptance rate

Technical Field

The utility model belongs to the technical field of solar cell, concretely relates to photovoltaic module with good backplate photic rate.

Background

Nowadays, as green and environment-friendly energy is more and more emphasized by many people, photovoltaic energy is gradually popular among people as an environment-friendly energy by converting light energy into electric energy by using semiconductor materials. The back power of the double-sided photovoltaic module is lower in the past, so the back power cannot be taken into consideration, the power of the back of the double-sided photovoltaic module is increasingly increased along with the development of the double-sided photovoltaic module technology, however, the light between the double-sided photovoltaic module battery pieces cannot be basically utilized on the back, so that the back light receiving rate of the double-sided photovoltaic module on the market at present is still far smaller than the front light receiving rate, and therefore a method for improving the back light receiving rate of the double-sided photovoltaic module is urgently needed to be found, and the whole light energy utilization rate of the photovoltaic module is improved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the back photic rate in order to solve two-sided photovoltaic module is less than the problem of positive photic rate far away, the utility model provides a photovoltaic module with good backplate photic rate is equipped with the reflector layer and subtracts anti-membrane through the surface at back photovoltaic glass to the reflector layer distributes in the clearance department of a plurality of battery pieces, thereby has improved the photic rate of photovoltaic module backplate.

The utility model discloses solve the technical scheme that its technical problem adopted and be: a photovoltaic module having good backsheet acceptance, comprising: front photovoltaic glass; the back photovoltaic glass is arranged opposite to the front photovoltaic glass, and the outer surface of the back photovoltaic glass is provided with an embossing surface; the plurality of battery pieces are distributed between the front photovoltaic glass and the back photovoltaic glass in an array manner, and gaps are formed between the adjacent battery pieces; the reflecting layer is arranged on the outer surface of the back photovoltaic glass and is positioned at the position of the gap in the orthographic projection on the outer surface of the back photovoltaic glass; and the antireflection film is arranged on the outer surface of the reflecting layer and covers the outer surface of the whole back photovoltaic glass. The utility model discloses photovoltaic module with good backplate photic rate sets up the knurling face through the surface at back photovoltaic glass, then locates back photovoltaic glass surface with the reflector layer, and the reflector layer is located the position of clearance at back photovoltaic glass surface orthographic projection, is equipped with the antireflection coating in the outside of reflector layer at last. Light shines the reflector layer through the clearance of battery piece, and the reflector layer utilizes self can high efficiency reflection light's principle, with light reflection to the battery piece to the photic rate of backplate has been improved.

Further, in order to ensure that the back of the battery piece can receive the reflected light of the reflecting layer, the distance of the orthographic projection of the reflecting layer beyond the gap is S, and the range of S is 0-10 mm.

Further, in order to ensure that the reflected light can be fully received by the cell, each gap is provided with a reflecting layer at the position of the orthographic projection of the outer surface of the back photovoltaic glass.

Furthermore, in order to make full use of the light at the edge of the glass plate, a reflecting layer is further arranged on the outer surface of the back photovoltaic glass close to the edge.

Further, preferably, the distance between adjacent battery pieces with gaps is 2mm-8 mm.

Further, in order to improve the light receiving rate of the photovoltaic module backboard, the embossing surface is provided with a protruding unit.

Further, preferably, the protrusion units are formed in a triangular prism, a quadrangular prism, a semicircular column, or an irregular diffused reflection structure.

Further, the reflecting layer is one or more of high-reflecting materials such as a white glaze coating layer, an aluminum oxide layer, white paint and the like.

Further, preferably, the material of the antireflection film is silicon dioxide.

Furthermore, the front photovoltaic glass is bonded with the plurality of battery pieces, and the back photovoltaic glass is bonded with the plurality of battery pieces. Transparent adhesive films are arranged between the front photovoltaic glass and the plurality of battery pieces, and transparent adhesive films are also arranged between the back photovoltaic glass and the plurality of battery pieces.

The beneficial effects of the utility model are that, a photovoltaic module with good backplate photic rate is equipped with the reflector layer through the surface at back photovoltaic glass to the reflector layer distributes in the clearance department of a plurality of battery pieces, can utilize the light in the battery piece clearance, and light shines the reflector layer through the clearance of battery piece, and the reflector layer utilizes self principle that can high efficiency reflection of light, reflects light to the battery piece, thereby has improved the photic rate of backplate.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a cross-sectional view of a photovoltaic module having good back-plate light acceptance according to a first embodiment of the present invention;

fig. 2 is a schematic enlarged partial view of a photovoltaic module with good back plate light acceptance according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a convex unit of a photovoltaic module with good back-plate light acceptance according to a first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a photovoltaic module having a good back-plate light acceptance rate according to a first embodiment of the present invention;

fig. 5 is a schematic structural diagram of another protruding unit of a photovoltaic module with good back plate light acceptance according to the second embodiment of the present invention;

fig. 6 is a schematic structural diagram of another protruding unit of a photovoltaic module with good back plate light acceptance according to the third embodiment of the present invention;

fig. 7 is a schematic structural diagram of another protruding unit of a photovoltaic module with good back-plate light acceptance according to the fourth embodiment of the present invention.

Reference numerals:

a photovoltaic module 100 having good back-sheet acceptance;

front photovoltaic glass 1; a back photovoltaic glass 2;

an embossed face 3; a battery piece 4; a gap 5;

a light-reflecting layer 6; an antireflection film 7; a projection unit 31.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1-4, a photovoltaic module 100 with good back-sheet acceptance comprises: front photovoltaic glass 1; the back photovoltaic glass 2 is arranged opposite to the front photovoltaic glass 1, and the outer surface of the back photovoltaic glass 2 is provided with an embossing surface 3; the solar photovoltaic glass comprises a plurality of battery pieces 4, wherein the battery pieces 4 are distributed between front photovoltaic glass 1 and back photovoltaic glass 2 in an array manner, and gaps 5 are formed between the adjacent battery pieces 4; the reflecting layer 6 is arranged on the outer surface of the back photovoltaic glass 2, and the reflecting layer 6 is positioned at the position of the gap 5 in the orthographic projection of the outer surface of the back photovoltaic glass 2; the antireflection film 7 is arranged on the outer surface of the reflecting layer 6, and the antireflection film 7 covers the outer surface of the whole back photovoltaic glass 2. The distance of the light reflecting layer 6 beyond the orthographic projection of the gap 5 is S, and the range of S is 0-10 mm. Each gap 5 is provided with a reflecting layer 6 at the position of the orthographic projection of the outer surface of the back photovoltaic glass 2. And a reflecting layer 6 is also arranged on the outer surface of the back photovoltaic glass 2 close to the edge. The distance between adjacent battery plates 4 with gaps 5 is 2mm-8 mm. The embossing surface 3 is provided with a projection unit 31. The protrusion unit 31 is shaped as a triangular prism. The reflecting layer 6 is one or more of a white glaze coating layer, an alumina layer and a white paint high-reflecting material. The material of the antireflection film 7 is silicon dioxide. Transparent adhesive films are arranged between the front photovoltaic glass 1 and the plurality of battery pieces 4, and transparent adhesive films are also arranged between the back photovoltaic glass 2 and the plurality of battery pieces 4.

Comparative example

Compared with a conventional 60 assembly, the common float grid back glass and the antireflection film back glass are adopted respectively, the sheet interval is set to be 6mm, the cell sheet is a perc double-sided cell sheet, and other materials are the same.

TABLE 1

	Common float grid	Antireflection film back glass
			Front side power	332.5	333.6
Back side power	260.3	267.4

This subtract anti-membrane back of body glass to the positive power of subassembly promote unobvious, nevertheless to subassembly back power promotion very big, compare ordinary float process net subassembly, but the back can promote power 2.72%, along with the promotion of two-sided battery technique, power promotion proportion can also be higher.

It should be noted that the front incident light ray a reaches the cell 4 through the front photovoltaic glass 1, and a small amount of the back incident light ray B reaches the cell 4 through the back photovoltaic glass. The front incident light A is incident through the front photovoltaic glass 1 and reaches the reflecting layer 6 through the gap of the cell 4, and the light A reaches the cell 4 through the reflection of the reflecting layer 6. Most of the reflected light rays a irradiate the front side of the cell 4, and a small part of the reflected light rays a irradiate the back side of the cell 4. The antireflection film 7 can reflect a small amount of back overflow light to the back of the battery plate 4, so that the back power of the assembly is improved.

Example two

As shown in fig. 5, the difference from the first embodiment is that the projection unit 31 has a quadrangular prism shape.

EXAMPLE III

As shown in fig. 6, the difference from the first embodiment is that the shape of the projection unit 31 is a half cylinder.

Example four

As shown in fig. 7, the difference from the first embodiment is that the shape of the convex unit 31 is an irregular diffuse reflection structure.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module having good backsheet acceptance, comprising:

front-side photovoltaic glass (1);

the back photovoltaic glass (2) is arranged opposite to the front photovoltaic glass (1), and the outer surface of the back photovoltaic glass (2) is provided with an embossing surface (3);

the solar photovoltaic glass comprises a plurality of battery pieces (4), wherein the battery pieces (4) are distributed between the front photovoltaic glass (1) and the back photovoltaic glass (2) in an array manner, and gaps (5) are formed between the adjacent battery pieces (4);

the reflecting layer (6) is arranged on the outer surface of the back photovoltaic glass (2), and the reflecting layer (6) is positioned at the position of the gap (5) in the orthographic projection of the outer surface of the back photovoltaic glass (2);

the antireflection film (7) is arranged on the outer surface of the reflecting layer (6), and the antireflection film (7) covers the outer surface of the whole back photovoltaic glass (2).

2. The photovoltaic module with good back-plate light acceptance according to claim 1, characterized in that the distance of the orthographic projection of the light-reflecting layer (6) beyond the gap (5) is S, which ranges from 0 to 10 mm.

3. The photovoltaic module with good backplane light acceptance according to claim 1, characterized in that each gap (5) is provided with a light reflecting layer (6) at the position of the orthographic projection of the outer surface of the back photovoltaic glass (2).

4. The photovoltaic module with good backplane light acceptance according to claim 1, characterized in that a light reflecting layer (6) is further provided on the outer surface of the back photovoltaic glass (2) near the edge.

5. The photovoltaic module with good backplane light acceptance according to claim 1, characterized in that the distance with gaps (5) between adjacent cells (4) is 2mm-8 mm.

6. Photovoltaic module with good backsheet acceptance according to claim 1, characterized in that the embossed face (3) is provided with raised elements (31).

7. The photovoltaic module with good backplane light acceptance according to claim 6, characterized in that the protruding units (31) are formed as triangular, quadrangular or semi-cylindrical prisms.

8. The photovoltaic module with good backplane light acceptance according to claim 1, characterized in that the material of the antireflection film (7) is silicon dioxide.

9. The photovoltaic module with good backplane light acceptance according to claim 1, characterized in that the front photovoltaic glass (1) is bonded to the plurality of cell pieces (4), and the back photovoltaic glass (2) is bonded to the plurality of cell pieces (4).