CN210575985U

CN210575985U - Black component

Info

Publication number: CN210575985U
Application number: CN201921915847.7U
Authority: CN
Inventors: 刘石勇; 何胜
Original assignee: Haining Astronergy Technology Co ltd; Chint Solar (Zhejiang) Co Ltd
Current assignee: Chint New Energy Technology Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-05-19
Anticipated expiration: 2029-11-07

Abstract

The utility model provides a black subassembly, this black subassembly include black frame and set up the subassembly body in this black frame, and this subassembly body includes transparent cover plate, first encapsulation glued membrane, solar array, second encapsulation glued membrane and backplate from last to extremely down in proper order, and this solar array includes a plurality of solar wafer, and wherein, this black subassembly still includes: a reflective layer disposed between the solar cell array and the second encapsulant film and/or between the second encapsulant film and the backsheet; the reflecting layer is provided with a reflecting area at a position corresponding to at least one solar cell in the plurality of solar cells, and other areas outside the reflecting area in the reflecting layer are transparent or dark; if the other areas are transparent, at least the parts of the back plate corresponding to the other areas are dark; if the other areas are dark, the back plate can be in any color. The utility model provides a black subassembly has outward appearance good and the high characteristics of power concurrently.

Description

Black component

Technical Field

The utility model relates to the field of photovoltaic technology, especially, relate to a black subassembly.

Background

At present, a conventional black module mainly comprises a black frame and a module body arranged in the black frame, wherein the module body sequentially comprises a transparent cover plate, a first packaging adhesive film, a solar cell array composed of solar cells, a second packaging adhesive film and a black back plate from top to bottom. Because the frame and the back plate are black, the appearance color of the assembly is consistent. This uniformity in appearance color makes black modules increasingly popular with consumers, especially in distributed rooftop power generation and building-integrated photovoltaic applications where certain requirements are placed on the roof appearance.

However, the existing black components also have certain disadvantages. Specifically, at present, high-efficiency batteries such as TOPcon and HJT adopt a double-sided structure, and 5% -10% of sunlight in the batteries penetrates through a battery piece to reach the surface of a back plate; meanwhile, the silicon wafers adopted by the subsequent cell pieces are thinner and thinner, so that more sunlight can penetrate through the cell pieces to reach the back plate. However, since the black back plate has a relatively low reflectivity to sunlight, sunlight passing through the solar cell is absorbed by the black back plate and cannot be reflected back to the solar cell for absorption and utilization again, so that the utilization rate of the black module to sunlight is lower than that of a conventional photovoltaic module without the black back plate, and further the power of the black module is lower than that of the conventional photovoltaic module.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned defect among the prior art, the utility model provides a black subassembly, this black subassembly include black frame and set up the subassembly body in this black frame, and this subassembly body includes transparent cover, first encapsulation glued membrane, solar array, second encapsulation glued membrane and backplate from last to down in proper order, and this solar array includes a plurality of solar wafer, and wherein, this black subassembly still includes:

a reflective layer disposed between the solar cell array and the second encapsulant film and/or between the second encapsulant film and the backsheet;

the reflecting layer is provided with a reflecting area at a position corresponding to at least one solar cell in the plurality of solar cells, and other areas outside the reflecting area in the reflecting layer are transparent or dark;

if the other areas are transparent, at least the parts of the back plate corresponding to the other areas are dark; if the other areas are dark, the back plate can be in any color.

According to the utility model discloses an aspect, in this black subassembly, the reflection stratum includes the reflection stratum body, and wherein, this reflection stratum body is transparent or dark, and this reflection stratum body orientation solar array is on the surface with at least one solar wafer on the position that corresponds on the coating have the reflection of light coating in order to form reflection zone.

According to another aspect of the present invention, in the black module, the material of the reflective layer body is an organic thin film; the material of the reflecting coating is reflecting paint containing tiny glass beads, microprisms or a metal reflecting coating.

According to still another aspect of the present invention, in the black module, the organic film is polypropylene, polyvinyl chloride, polystyrene, polyethylene terephthalate, polycarbonate or organic glass; the reflective coating is white titanium dioxide coating.

According to still another aspect of the present invention, in the black member, the reflectance of the reflection area is 70% or more.

According to another aspect of the present invention, in the black module, the solar cell sheet forms a complete coverage of the reflection region.

According to the utility model discloses a still another aspect, in this black subassembly, the shape of reflection zone with the shape phase-match of solar wafer, but the length of side of reflection zone is than the length of side of solar wafer is 1mm to 20mm less.

The utility model provides a black subassembly includes black frame and sets up the subassembly body in this black frame, and this subassembly body is from last to including transparent cover, first encapsulation glued membrane, solar array, second encapsulation glued membrane and backplate down in proper order, and this black subassembly still includes the reflection stratum, and this reflection stratum sets up solar array with between the second encapsulation glued membrane and/or set up second encapsulation glued membrane with between the backplate, the reflection stratum is formed with the reflection zone on the position that corresponds with at least one solar wafer in the solar array, and other regions that lie in outside the reflection zone in the reflection stratum are transparence or dark, wherein, if other regions are transparence then the backplate in at least with other regional corresponding parts be dark, if other regions are dark then the backplate can be arbitrary colour. On one hand, the black component provided by the utility model is provided with the reflection area below at least one solar cell, and the reflection area can reflect the sunlight penetrating through the solar cell back to the solar cell for reuse, so that the utilization rate of the sunlight can be effectively increased, and the component power of the black component is effectively improved; on the other hand, the other region of the reflective layer outside the reflective region is transparent or dark, wherein the back sheet of the black matrix is dark when the other region is transparent, in which case the gap between the solar cells and the frame are dark in appearance, and when the other region itself is dark, the gap between the solar cells and the frame are dark in appearance regardless of the color of the back sheet. Therefore, the appearance attractiveness of the black component is effectively ensured. That is to say, compare with current black subassembly, the utility model provides a black subassembly has not only guaranteed the aesthetic property of outward appearance but also has improved the power of subassembly effectively.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is a schematic cross-sectional view of a black module according to an embodiment of the present invention;

fig. 2 is a schematic sectional view of a black module according to another embodiment of the present invention;

fig. 3 is a schematic top view of the reflective layer of fig. 1 and 2.

The same or similar reference numbers in the drawings identify the same or similar elements.

Detailed Description

For a better understanding and explanation of the present invention, reference will now be made in detail to the present invention, which is illustrated in the accompanying drawings.

The utility model provides a black subassembly, this black subassembly include black frame and set up the subassembly body in this black frame, and this subassembly body includes transparent cover plate, first encapsulation glued membrane, solar array, second encapsulation glued membrane and backplate from last to extremely down in proper order, and this solar array includes a plurality of solar wafer, and wherein, this black subassembly still includes:

Hereinafter, each constituent part of the above-described black matrix will be described in detail with reference to fig. 1 to 3.

Specifically, as shown in fig. 1 and 2, the black assembly includes a black bezel 160 and an assembly body disposed in the black bezel 160. The black border 160 may be implemented using the same materials as borders in existing black components, and for the sake of brevity, a list of all possible materials that may be used to implement the black border 160 is not provided herein. As shown in fig. 1 and 2, the module body further includes a reflective layer, in addition to the transparent cover plate 100, the first packaging adhesive film 110, the solar cell array including the plurality of solar cells 120, the second packaging adhesive film 140, and the back sheet 150, which are sequentially arranged from top to bottom, wherein the reflective layer may be disposed between the solar cell array and the second packaging adhesive film 140 as shown in fig. 1, or may be disposed between the second packaging adhesive film 140 and the back sheet 160 as shown in fig. 2.

The respective constituent parts of the module body in fig. 1 will be described first in the order from top to bottom.

In the present embodiment, the transparent cover plate 100 is implemented by using tempered glass. In other embodiments, the transparent cover 100 may be implemented by using common glass. The utility model discloses do not have any restriction to the material of transparent cover plate 100, all be applicable to the material of transparent cover plate 100 among the prior art and all fall into the utility model discloses an in the protection scope, for the sake of brevity, no longer enumerate one by one here. The thickness of the transparent cover 100 is typically around 3.2 mm. It will be understood by those skilled in the art that a thickness of the transparent cover 100 of about 3.2mm is only a preferred embodiment, and in other embodiments, the thickness of the transparent cover 100 may have other values, and for the sake of brevity, all possible thicknesses of the transparent cover 100 are not listed again.

In this embodiment, the first encapsulant film 110 is a transparent EVA film, a POE film, or a PVB film. It can be understood by those skilled in the art that the above-mentioned EVA film, POE film or PVB film are only illustrative examples, and in other embodiments, the first packaging film 110 can also be other films, and all transparent films that can achieve the adhesion function fall into the protection scope of the present invention, and for the sake of brevity, all possible materials of the first packaging film 110 are not listed. The thickness of the first adhesive packaging film 110 is usually 1mm or less.

Solar cell arrays are used to convert solar energy into electrical energy. The solar cell array includes a plurality of cell strings, each of which further includes a plurality of solar cells 120. The utility model discloses material, specification, quantity and connected mode to solar wafer do not all have any restriction. The solar cell 120 may be a polycrystalline silicon cell, a monocrystalline silicon cell, or the like. In terms of specification, the solar cell sheet 120 may be a standard solar cell sheet or a sliced cell obtained by cutting a standard solar cell sheet. The number of the solar cells 120 may be 60 (arranged in a manner of 6 rows × 10 columns), 72 (arranged in a manner of 6 rows × 12 columns), or the like in terms of number. In terms of the connection mode, the plurality of solar cells 120 may be connected in series, may be connected in parallel, or may include both series and parallel connections. Similarly, the plurality of battery strings may be connected in series or in parallel, or may include both series and parallel connections.

The reflective layer is provided with a reflective region facing the solar cell and capable of reflecting sunlight at a position corresponding to at least one of the plurality of solar cells, and the other regions of the reflective layer outside the reflective region are transparent or dark, wherein the dark color includes but is not limited to black, blue black and the like. Therefore, when the black component works, sunlight which penetrates through the solar cell piece and reaches the reflection area can be reflected back to the solar cell piece by the reflection area. Among the prior art, thereby the sunlight that sees through solar wafer is absorbed by black backplate and leads to this part sunlight to be lost in vain, and the utility model provides a black subassembly makes the sunlight that sees through at least one solar wafer be reflected back solar wafer and utilizes once more owing to set up reflection area in solar wafer below to improve the utilization ratio of sunlight effectively, and then improved black subassembly's power. In order to improve the utilization rate of sunlight as much as possible, it is preferable that a reflective region is formed on the reflective layer at a position corresponding to each solar cell, that is, a reflective region is disposed below each solar cell in the black module. In addition, a high-reflectivity material can be used to realize the reflection area, so that more sunlight can be reflected back to the solar cell as much as possible. Preferably, the reflection area is implemented using a material having a reflectance of sunlight of 70% or more. The utility model discloses there is not any restriction to the material of reflection zone territory, and the material that all can form the reflection to the sunlight all is applicable to the utility model discloses the regional realization of well reflection, for the sake of brevity, no longer enumerate one by one to all possible materials of reflection zone territory here.

For the implementation of the reflective layer, in a specific embodiment, the reflective layer includes a reflective layer body, wherein the reflective layer body is transparent or dark (black, blue-black, etc.), and a reflective coating is coated on a surface of the reflective layer body facing the solar cell array corresponding to a position of the at least one solar cell to form a reflective area. Referring to fig. 1 and 3 in combination, as shown in the figure, preferably, the surface of the reflective layer body 130 facing the solar cell array is coated with a reflective coating 132 at a position corresponding to each solar cell 120 to form a reflective region. In the present embodiment, the material of the reflective layer body 130 is an organic film, such as polypropylene, polyvinyl chloride, polystyrene, ethylene terephthalate, polycarbonate, organic glass, etc.; the reflective coating 132 is made of reflective paint containing tiny glass beads, microprisms or metal reflective coating, such as white titanium pigment paint. In the case where the reflective layer body has a dark color, it can be realized by adding a black material such as carbon black or graphite to the transparent material. It will be understood by those skilled in the art that the above materials are only preferred embodiments, and that all materials that are suitable for manufacturing photovoltaic modules and have transparent or dark colors can be used for realizing the reflective layer body, and all coatings that can reflect sunlight can be used for realizing the reflective region, and for the sake of simplicity, a list of possible materials for the reflective layer body and the reflective coating layer is omitted. The utility model discloses do not do any injecing to the thickness of reflection stratum body, can confirm the actual thickness of reflection stratum body according to the specific design demand.

Preferably, the solar cell 120 covers the reflective area under the solar cell completely, that is, the reflective area cannot be seen when looking down from above the transparent cover plate 100. The reflective area is completely covered by the solar cell 120, so that the influence of the reflection of the reflective area on the appearance of the black module can be effectively avoided. On the premise that the reflective region is completely covered by the solar cell sheet 120, considering that the reflective region has an area as large as possible to reflect more sunlight and considering that the solar cell sheet may be displaced during the lamination process to form the module body, it is more preferable that the shape of the reflective region is designed to match the shape of the solar cell sheet, but the side length of the reflective region is slightly smaller than the side length of the solar cell sheet. In the present embodiment, the side length of the reflective region is 1mm to 20mm smaller than the side length of the solar cell.

In this embodiment, the second adhesive packaging film 140 is a transparent EVA film, a POE film, or a PVB film. It is understood by those skilled in the art that the above-mentioned EVA adhesive film, POE adhesive film or PVB adhesive film are only illustrative examples, and in other embodiments, the second encapsulant film 140 can also be other adhesive films, and all transparent adhesive films that can achieve the adhesive function all fall into the protection scope of the present invention, and for the sake of brevity, all possible materials of the second encapsulant film 140 are not listed. The thickness of the second adhesive packaging film 140 is usually 1mm or less.

The implementation of the back sheet 150 depends on the color of the reflective layer body 130. If the reflection layer body 130 is transparent, that is, other regions of the reflection layer outside the reflection region are transparent, in this case, at least the portion of the back plate 150 corresponding to other regions of the reflection layer is dark (for example, black, bluish black, etc.), so that the gap between the solar cells 120 and the black frame 160 are dark in appearance, thereby ensuring the consistency of the appearance color of the black module. The dark back plate is not limited in any way and can be implemented by using a black back plate in a conventional black assembly, for example. If the reflective layer body 130 is dark, that is, other regions of the reflective layer outside the reflective region are dark, in this case, the gaps between the solar cells 120 and the black frame 160 are dark in appearance, so the back sheet 150 may be any color, for example, a conventional black back sheet or a white back sheet.

The difference between the device body in fig. 2 and the device body in fig. 1 is only the position of the reflective layer, and therefore, for the description of the components of the device body in fig. 2, reference may be made to the description of the corresponding parts in fig. 1, and for the sake of brevity, the description is omitted here.

It should be noted that, in addition to being disposed between the solar cell array and the second encapsulant film or between the second encapsulant film and the back sheet, the reflective layer may be disposed between the solar cell array and the second encapsulant film and between the second encapsulant film and the back sheet.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it will be obvious that the term "comprising" does not exclude other elements, units or steps, and the singular does not exclude the plural. A plurality of components, units or means recited in the system claims may also be implemented by one component, unit or means in software or hardware.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. The utility model provides a black subassembly, this black subassembly includes black frame and sets up the subassembly body in this black frame, and this subassembly body includes transparent cover plate, first encapsulation glued membrane, solar array, second encapsulation glued membrane and backplate from last to down in proper order, and this solar array includes a plurality of solar wafer, its characterized in that, and this black subassembly still includes:

2. The black assembly of claim 1, wherein:

the reflecting layer comprises a reflecting layer body, wherein the reflecting layer body is transparent or dark, and a reflecting coating is coated on the position, corresponding to at least one solar cell piece, on the surface, facing the solar cell array, of the reflecting layer body so as to form a reflecting area.

3. The black assembly of claim 2, wherein:

the material of the reflecting layer body is an organic thin film.

4. The black assembly of claim 3, wherein:

the organic film is polypropylene, polyvinyl chloride, polystyrene, ethylene terephthalate, polycarbonate or organic glass;

the material of the reflective coating is white titanium dioxide paint.

5. The black assembly according to any one of claims 1 to 4, wherein a reflectance of the reflective region is 70% or more.

6. The black assembly of claim 1, wherein the solar cell sheet forms a complete coverage of the reflective region.

7. The black assembly of claim 6, wherein:

the shape of the reflection region is matched with that of the solar cell piece, but the side length of the reflection region is 1mm to 20mm smaller than that of the solar cell piece.