CN215070005U

CN215070005U - High-reflectivity photovoltaic black backboard

Info

Publication number: CN215070005U
Application number: CN202120367913.2U
Authority: CN
Inventors: 肖怀韬; 张昌远; 何涛; 王帅; 张艳飞; 吴昊
Original assignee: LIANYUNGANG SHENZHOU NEW ENERGY CO Ltd
Current assignee: LIANYUNGANG SHENZHOU NEW ENERGY CO Ltd
Priority date: 2021-02-10
Filing date: 2021-02-10
Publication date: 2021-12-07
Anticipated expiration: 2031-02-10

Abstract

The utility model discloses a photovoltaic black backplate of high reflectivity, including high reflection basic unit and black clearance euphotic layer, black clearance euphotic layer sets up high reflection basic unit on, black clearance euphotic layer be provided with the blank clearance, blank clearance width scope is 0.1-50 microns, satisfies the clearance permeable and can be absorbed by the battery piece and turn into the light of electric energy, but the requirement that the clearance can not be discerned by the naked eye. The utility model discloses do not change the mode of current optimal warehousing and transportation, cutting, encapsulation backplate, can make the light most see through backplate black clearance euphotic layer, reflect back by the high reflection basic unit again and absorb by the battery piece especially two-sided battery piece and turn into the electric energy. The photoelectric conversion efficiency of the assembly can be greatly improved, the heat generation of the assembly back plate is reduced, the cost of the back plate is reduced, and the assembly efficiency is improved.

Description

High-reflectivity photovoltaic black backboard

Technical Field

The utility model belongs to the solar cell field, concretely relates to high reflectivity's photovoltaic black backplate.

Background

The black solar cell module is used as a photovoltaic module with a special appearance, is more suitable for being applied to a roof and building integrated project, and meets the appearance requirement of a user. Generally, to improve the photoelectric conversion efficiency, the back sheet is a white back sheet with high reflectivity, but if the back sheet is applied to a roof, a building and other occasions with special requirements on appearance, a full black component using a black back sheet is generally used. Most of black back plates adopted by existing component manufacturers are made of black materials, and solar rays which penetrate through the cell, especially double-sided cells, and irradiate gaps among the cells are absorbed by the black back plates and are converted into heat energy, so that the solar rays are difficult to be effectively utilized, and the photoelectric conversion efficiency of the component is greatly reduced. At present, some manufacturers of the back plates use black grid back plates to replace completely black back plates in order to improve the reflectivity of the black back plates, that is, the back plates at the gaps of the battery pieces are black, and the other parts are white. However, the black grid back plate has high precision for use requirements of cutting, packaging and the like of a component factory, batch back plates are scrapped due to slight cutting deviation, and light rays at the gaps of the battery pieces cannot be effectively utilized, so that the black grid back plate can be packaged and transported only after being cut by a back plate manufacturer, and the storage and transportation cost and the waste back plate material cost are high.

Disclosure of Invention

In order to solve the problem, the utility model discloses a photovoltaic black backplate of high reflectivity does not change current optimal warehousing and transportation, cuts, the mode of encapsulation backplate, can make light most see through backplate black clearance euphotic layer, reflects back by the high reflection basic unit again and is absorbed by the battery piece especially two-sided battery piece and turn into the electric energy. The photoelectric conversion efficiency of the assembly can be greatly improved, the heat generation of the assembly back plate is reduced, the cost of the back plate is reduced, and the assembly efficiency is improved.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a high reflectivity photovoltaic black backsheet, comprising: the high-reflection substrate and the black gap euphotic layer are arranged on the high-reflection substrate, the black gap euphotic layer is provided with a blank gap, and the width range of the blank gap is 0.1-50 micrometers.

As an improvement of the utility model, the black gap euphotic layer is a layer of film adhered on the high reflection base layer; or the black gap light-transmitting layer is directly printed on the high-reflection base layer by pigment.

As an improvement of the present invention, the black gap light-transmitting layer uses a black material having a high reflectivity.

As an improvement of the utility model, the shape of the blank gap is any pattern such as a strip, a dot, a honeycomb or a grid.

As an improvement of the utility model, the width range of the blank gap is 0.1-50 microns, which satisfies the requirement that the gap can be absorbed by the battery piece to be converted into electric energy, but the gap can not be identified by naked eyes.

As an improvement of the utility model, the general major structure of mainstream backplate on the market is drawn together to the high reflection basic unit, can be for the backplate of arbitrary structure like TPT, TPE, KPE, KPK, KPF, PPE etc..

As an improvement of the present invention, the inner layer of the high reflection base layer is white or the like with a color having a higher light reflectivity.

The utility model has the advantages that:

the utility model can be packaged into a black component by using the black backboard, thereby meeting the requirement of users on black appearance; the existing optimal modes of storing, transporting, cutting and packaging the back plate are not changed; meanwhile, the light penetrating through the cell is reflected by the high-reflection base layer and absorbed by the cell to be converted into electric energy for utilization; black clearance euphotic layer between the battery piece is provided with the micro-clearance that the naked eye can not distinguish, and the gap can the printing opacity for when whole looks black, can see through partial light again and arrive the high reflection basic unit and reflect back again and absorb the conversion utilization by the battery piece, thereby greatly increased battery piece is to the conversion utilization ratio of light.

Drawings

Fig. 1 is an enlarged schematic cross-sectional view of a high-reflectivity photovoltaic black back plate according to the present invention;

FIG. 2 is a plan view of a highly reflective base layer on the outside of the back plate;

FIG. 3 is an enlarged view of the black gap transparent layer facing the battery piece on the inner side of the back plate;

FIG. 4 is a microscopic, enlarged schematic view of several other structures listed.

List of reference numerals:

1. a black gap euphotic layer, 2, a high reflection base layer, 3 and a blank gap.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and embodiments, which are to be understood as illustrative only and not limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in the figure, the photovoltaic black back plate with high reflectivity of the present invention is described by taking a strip-shaped gap structure shown in fig. 4 as an example, and includes:

the black gap euphotic layer 1 is provided with a micro blank gap 3 which can not be distinguished by naked eyes, and the gap can be euphotic, so that the whole body looks black;

the high-reflection base layer 2, including the general main structure of the mainstream back sheet in the market, can be any back sheet structure such as TPT, TPE, KPE, KPK, KPF, PPE, etc., and the inner layer thereof needs to have higher light reflectivity (e.g. white);

instructions for use:

the high-reflection base layer 2 is a main body of the photovoltaic black backboard, and the black gap euphotic layer 1 is adhered to or printed on the high-reflection base layer 2. After the black photovoltaic module is manufactured by a conventional packaging process, the requirement of a user on the appearance of the black module is met. Part of light penetrates through the cell, is directly reflected back through the high-reflection base layer 2 and is absorbed by the cell, particularly the double-sided cell, so as to be converted into electric energy; most of light rays at the gap of the cell penetrate through the black gap euphotic layer 1, and are reflected by the high-reflection base layer 2 to be absorbed by the cell and converted into electric energy. The existing optimal modes of storing, transporting, cutting and packaging the back plate are not changed. The photoelectric conversion efficiency of the assembly can be greatly improved, and the heat generation of the assembly back plate is reduced.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make various forms without departing from the spirit and scope of the present invention, which falls within the protection of the present invention, such as using black gap light-transmitting layers of different materials, or film layers or printing layers; the utility model discloses only exemplify two kinds of clearance structures in strip clearance, punctiform clearance, can also be based on the utility model discloses a thought makes various structures such as other grids, honeycomb, and these all belong to within the protection of the utility model.

Claims

1. A high reflectivity's photovoltaic black backplate which characterized in that: the high-reflectivity light-transmitting film comprises a high-reflectivity base layer and a black gap light-transmitting layer, wherein the black gap light-transmitting layer is arranged on the high-reflectivity base layer, a blank gap is formed in the black gap light-transmitting layer, and the width range of the blank gap is 0.1-50 micrometers.

2. The high reflectance photovoltaic black backsheet according to claim 1, wherein: the black gap euphotic layer is a layer of film which is adhered to the high reflection base layer; or the black gap light-transmitting layer is directly printed on the high-reflection base layer by pigment.

3. The high reflectance photovoltaic black backsheet according to claim 1, wherein: the blank gaps are in the shapes of strips, dots, honeycombs or grids.

4. The high reflectance photovoltaic black backsheet according to claim 1, wherein: the high-reflection base layer comprises TPT, TPE, KPE, KPK, KPF and PPE.

5. The high reflectance photovoltaic black backsheet according to claim 1, wherein: the inner layer of the high-reflection base layer is white.