CN218498082U

CN218498082U - Black high-infrared reflection type adhesive film and photovoltaic cell

Info

Publication number: CN218498082U
Application number: CN202221396686.7U
Authority: CN
Inventors: 李民; 覃勇
Original assignee: Shanghai HIUV Applied Materials Technology Co Ltd; Shanghai HIUV New Materials Co Ltd
Current assignee: Shanghai HIUV Applied Materials Technology Co Ltd; Shanghai HIUV New Materials Co Ltd
Priority date: 2022-05-28
Filing date: 2022-05-28
Publication date: 2023-02-17
Anticipated expiration: 2032-05-28

Abstract

The application relates to a black high infrared reflection formula glued membrane, its reflection of light portion and the light receiving part that includes the interval and set up, reflection of light portion includes that the successive layer sets up: the two surfaces of the white film layer are respectively formed into a back plate connecting surface and a visible light reflecting surface; the black high-transmittance coating layer is internally provided with an infrared light transmission area, and the surface far away from the backboard connecting surface is formed into a battery piece connecting surface. The power generation system has the advantage of improving power generation efficiency.

Description

Black high-infrared reflection type adhesive film and photovoltaic cell

Technical Field

The application relates to the field of photovoltaic power generation, in particular to a black high-infrared reflection type adhesive film and a photovoltaic cell.

Background

Due to the support and the technical progress of national photovoltaic policies, the development of the photovoltaic industry in China is rapid in recent years, and since 2008, the yield and the output value of the photovoltaic industry exceed those of traditional photovoltaic strong countries such as Germany and Japan, and the photovoltaic industry leaps the first world. However, at present, the photoelectric conversion effect of the solar cell is difficult to improve and is always maintained between 19% and 21%, and after the cell is packaged into a module, the packaging loss still exists, so how to improve the photoelectric conversion efficiency of the photovoltaic cell becomes a focus of attention of the photovoltaic industry in the world and an important reference of new energy industry layout of governments of various countries. The packaging losses of the assembly are manifold, including the spacing between the cells and the gaps between the cells and the edges of the assembly, and the high temperature causes the photoelectric conversion efficiency to decrease.

In the related art, the solar photovoltaic module includes a multi-layered structure in which a rear surface structure appears black due to appearance, and is capable of strongly absorbing most of infrared light. When sunlight enters the gaps of the battery plates, the sunlight is easily absorbed by the back structure, the working temperature of the assembly is easily increased excessively to deviate from the optimal working temperature range, and the power generation efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

In order to improve the generating efficiency, this application provides a black high infrared reflection-type glued membrane and photovoltaic cell.

In a first aspect, the application provides a black high infrared reflection type adhesive film, which adopts the following technical scheme:

the utility model provides a black high infrared reflection-type glued membrane, includes reflector portion and the light receiving part that the interval set up, reflector portion includes that the layer-by-layer sets up:

the two surfaces of the white film layer are respectively formed into a back plate connecting surface and a visible light reflecting surface;

the black high-transmittance coating layer is internally provided with an infrared light transmission area, and the surface far away from the backboard connecting surface is formed into a battery piece connecting surface.

By adopting the technical scheme, sunlight enters the white film layer and the black high-transmittance coating layer through the gap between the cells and is penetrated, reflected and absorbed by the white film layer and the black high-transmittance coating layer. In the infrared region, in addition to power generation on the cell, the temperature of the cell rises, and the internal resistance of the cell increases after the temperature rises, so that the electron movement speed is reduced, and the power generation efficiency of the cell is reduced. Therefore, in this scheme, black high-transparent coating layer carries out transmission for the first time to infrared light and visible light, and the white rete is to visible light and infrared reflection to prevent sunlight to pass on the notacoria spreads the backplate. The white film layer has high light reflection rate, and light of the light receiving part can be reflected to the back of the cell through the visible light reflecting surface, so that the light absorption amount of the back of the cell is improved, and the power generation efficiency of the cell is improved. Meanwhile, the white film layer reduces the visible light entering the back plate through reflection, and the heat generated by the back plate is reduced.

Optionally, the light receiving portion is formed by extending the white film layer and the black high-transmittance coating layer, and a light receiving surface is formed on the outer surface of the adhesive film.

Optionally, the light receiving surface is oriented in the same direction as the cell connecting surface.

Through adopting above-mentioned technical scheme, the setting of light receiving part helps in the sunlight to conduct more among white rete and the high dope layer that passes through of black.

Optionally, the white film is an EVA material or a POE material.

Optionally, the black high-transparency coating layer contains one substance of a direct light-fast dye, a direct diazo dye, a direct cross-linking dye or an azo dye containing complex metal, or a mixture of a plurality of substances.

Optionally, the black high-transmittance coating layer contains one or more of direct black 144, a metal complex dye X55, an azo pigment B27, aniline black No.2, perylene black LP32, or perylene black L0086.

In a second aspect, the present application provides a photovoltaic cell, which adopts the following technical solution:

a photovoltaic cell comprises the black high-infrared reflection type adhesive film, a cell piece and a back plate, wherein the cell piece is adhered to the cell piece connecting surface, and the back plate is adhered to the back plate connecting surface.

Drawings

Fig. 1 is a schematic diagram of a layer structure of a photovoltaic cell according to an embodiment of the present application.

Description of reference numerals:

1. a back plate; 2. a battery piece; 3. a black high infrared reflection type adhesive film; 31. a light reflecting section; 311. a white film layer; 312. a black high-transparency coating layer; 32. a light receiving section; 321. a light receiving surface.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the inventive concepts. As part of this description, some of the drawings of the present disclosure represent structures and devices in block diagram form in order to avoid complicating the disclosed principles. In the interest of clarity, not all features of an actual implementation are described in this specification. Moreover, the language used in the present disclosure has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter, resort to the claims being necessary to determine such inventive subject matter. Reference in the present disclosure to "one implementation" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the implementation is included in at least one implementation, and references to "one implementation" or "an implementation" are not to be understood as necessarily all referring to the same implementation.

Unless explicitly defined otherwise, the terms "a," "an," and "the" are not intended to refer to a singular entity, but include the general class of which a particular example may be used for illustration. Thus, use of the terms "a" or "an" can mean any number of at least one, including "a," one or more, "" at least one, "and" one or more than one. The term "or" means any of the alternatives and any combination of alternatives, including all alternatives, unless alternatives are explicitly indicated as mutually exclusive. The phrase "at least one of," when combined with a list of items, refers to a single item in the list or any combination of items in the list. The phrase does not require all of the listed items unless explicitly so limited.

The embodiment of the application discloses a photovoltaic cell. Referring to fig. 1, the photovoltaic cell includes a back sheet 1, a cell sheet 2, and a black high infrared reflection type adhesive film 3 between the back sheet 1 and the cell sheet 2. The battery piece 2 is continuously arranged on the black high infrared reflection type adhesive film 3 at intervals, and specifically, the battery piece 2 and the black high infrared reflection type adhesive film 3 are adhered to each other. The black high infrared reflection type adhesive film 3 is connected with a back plate 1 on one side departing from the battery piece 2, and the back plate 1 is continuously arranged on the black high infrared reflection type adhesive film 3. It should be noted that the back sheet 1, the battery piece 2 and the black high infrared reflection type adhesive film 3 are separated from each other in the illustration of fig. 1, and they are connected to each other in the actual product only for the sake of understanding.

Accordingly, the black high infrared reflection type adhesive film 3 is divided into a light reflection portion 31 and a light receiving portion 32 which are arranged at intervals based on the connection position of the back plate 1 and the battery pieces 2, wherein both sides of the light reflection portion 31 are respectively used for connecting with the back plate 1 and the battery pieces 2, and the light receiving portion 32 is used as a corresponding part of the gap between the battery pieces 2 and can receive sunlight passing between the battery pieces 2.

The black high infrared reflection type adhesive film 3 comprises a white film layer 311 and a black high transmission coating layer 312, and since the black high infrared reflection type adhesive film 3 is formed by extrusion of an extruder, the light reflecting part 31 and the light receiving part 32 are both in a continuous structure of the white film layer 311 and the black high transmission coating layer 312, and the light reflecting part 31 and the light receiving part 32 are only distinguished by the difference of the connecting positions with the back plate 1 and the battery piece 2. In one embodiment, the white film layer 311 and the black high-transmittance coating layer 312 are disposed on the back plate 1 layer by layer, one side of the white film layer 311 close to the back plate 1 forms a back plate connection surface, and one side of the black high-transmittance coating layer 312 far away from the back plate connection surface forms a cell connection surface. The white film layer 311 and the black high-transmittance paint layer 312 of the light reflection part 31 serve to absorb and reflect sunlight penetrated from the side, and the cell connection surface serves to connect the cell 2. The light receiving part 32 is located at a side of the light reflecting part 31, and receives sunlight and transmits the sunlight to the white film layer 311 and the black high-transmittance paint layer 312 in the light reflecting part 31.

Specifically, a visible light reflecting surface is formed on the connecting surface of the white film layer 311 and the black high-transmittance coating layer 312, the white film layer 311 has a high light reflection rate and is opaque, the light absorption amount of the back surface of the cell 2 can be increased through the visible light reflecting surface, and the power generation efficiency of the cell 2 is increased. In various embodiments, the thickness of the heat absorbing region and the light transmitting region depends on the material of the white film layer 311, and the two regions may or may not overlap. The white film can be a white glue film formed by adding auxiliary materials to the EVA materials, or a white glue film formed by adding auxiliary materials to the POE materials, or a white glue film formed by adding auxiliary materials to the mixed materials formed by POE and EPDM.

Specifically, an infrared light transmission region is formed inside the black super-reflective coating layer 312. The infrared light transmission region can transmit most of infrared light, and the transmitted infrared light is reflected by the white film layer 311 and then transmits through the black high-reflective coating layer 312 again. In various embodiments, the visible light reflection region is a functional region formed by the black high-transmittance coating layer 312, which overlaps with each other, for example, the black high-transmittance coating layer 312 includes one of a direct light-fast dye, a direct diazo dye, a direct cross-linking dye, or an azo dye containing a complex metal, or a mixture of a plurality of materials. Specifically, the black high-transmittance coating layer 312 contains one of direct black 144, metal complex dye X55, azo pigment B27, aniline black No.2, perylene black LP32, or perylene black L0086, or a mixture of a plurality of substances. That is, the black high-transmittance coating layer 312 is formed by dispersing these substances into the substrate.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The black high-infrared-reflection-type adhesive film is characterized by comprising a light reflecting part (31) and a light receiving part (32) which are arranged at intervals, wherein the light reflecting part (31) comprises the following components arranged layer by layer:

the white film layer (311), two surfaces of the white film layer (311) are respectively formed into a back plate connecting surface and a visible light reflecting surface;

the black high-transmittance coating layer (312) is internally provided with an infrared light transmission area, and one surface far away from the backboard connecting surface is formed into a battery piece connecting surface.

2. The black high infrared reflection type adhesive film according to claim 1, wherein the light receiving part (32) is epitaxially formed by the white film layer (311) and the black high transmittance coating layer (312), and a light receiving surface (321) is formed on an outer surface of the adhesive film.

3. The black high infrared reflection type adhesive film according to claim 2, wherein the light receiving surface (321) has the same orientation as the connection surface of the cell sheet (2).

4. The black halr reflective adhesive film according to claim 1, wherein the white film is EVA material or POE material.

5. A photovoltaic cell comprising the black high IR reflecting adhesive film (3) according to any one of claims 1 to 4, further comprising a cell sheet (2) and a back sheet (1), wherein the cell sheet (2) is adhered to the cell sheet connection surface and the back sheet (1) is adhered to the back sheet connection surface.