CN220627820U

CN220627820U - Photovoltaic module

Info

Publication number: CN220627820U
Application number: CN202321543800.9U
Authority: CN
Inventors: 白帆; 夏靖辉; 何晨旭; 徐伟智
Original assignee: Chint New Energy Technology Co Ltd
Current assignee: Chint New Energy Technology Co Ltd
Priority date: 2023-06-16
Filing date: 2023-06-16
Publication date: 2024-03-19
Anticipated expiration: 2033-06-16

Abstract

The utility model discloses a photovoltaic module, which is applied to the technical field of photovoltaic power generation and comprises the following components: the glass, the first packaging EVA, the battery piece layer, the second packaging EVA, the gap reflective film and the light-transmitting backboard are sequentially arranged; the gap light reflecting film includes: the reflecting layer, the prism structure, the substrate layer and the bonding layer are sequentially arranged; the bonding layer is bonded with the surface of the light-transmitting backboard; the reflecting layer is a fluorine-containing organic pigment layer. The solar cell module has good reflection performance and weather resistance, can directionally reflect sunlight, is further absorbed by the cell, increases the utilization of the module to light rays, and effectively improves the power of the module; and the pigment can be prepared into chromaticity at will, and the selectivity is higher for any battery collocation and customer requirements.

Description

Photovoltaic module

Technical Field

The utility model relates to the technical field of photovoltaic power generation, in particular to a photovoltaic module.

Background

With the continuous development of the photovoltaic industry, the consumer photovoltaic market is bursting into the powerful growth kinetic energy, and the consumer photovoltaic market is continuously 'warming' as an important power supply and supplementary energy source form. The application environment such as a roof and the like can be more attractive to the overall effect of the landscape, the full black component has the aesthetic property of the building, and the local ecology is perfectly integrated, so that the higher aesthetic appeal beyond photovoltaic power generation can be met.

At present, the whole black component product is mainly packaged on the back in a black backboard or black glazed glass mode, on one hand, the reflectivity of the whole black component product is lower due to the fact that black absorbs light, and the power of the whole black component product is lower than that of a conventional photovoltaic component by one gear or even lower; on the other hand, the color is single, the battery pieces of different colors cannot be matched, and the serious color difference problem exists after the assembly is packaged. Therefore, it is desirable to provide a photovoltaic module to solve the problems of low power and chromatic aberration of the existing all-black modules.

Disclosure of Invention

Therefore, the utility model aims to provide a photovoltaic module for solving the problems of low power and chromatic aberration of the existing all-black module.

In order to solve the above technical problems, the present utility model provides a photovoltaic module, including: the glass, the first packaging EVA, the battery piece layer, the second packaging EVA, the gap reflective film and the light-transmitting backboard are sequentially arranged;

the gap light reflecting film includes: the reflecting layer, the prism structure, the substrate layer and the bonding layer are sequentially arranged; the bonding layer is bonded with the surface of the light-transmitting backboard; the reflecting layer is a fluorine-containing organic pigment layer.

Optionally, the light-transmitting backboard and the gap reflective film are provided with openings at positions corresponding to the hole sites; the hole sites are the locations from which the bus bars are drawn.

Optionally, the photovoltaic module includes: positioning adhesive tapes for connecting adjacent battery strings in the battery sheet layer; the positioning adhesive tape is EVA adhesive tape.

Optionally, the EVA adhesive tape comprises a substrate layer EVA and a pressure-sensitive adhesive; the pressure sensitive adhesive is arranged on the surface of the substrate layer EVA, which is close to the battery string.

Optionally, the gap reflective film further includes: a black fluorine coating; the black fluorine coating is arranged on the surface of the substrate layer, which is close to the bonding layer.

Optionally, the black fluorine coating is a black acrylic ultraviolet curing resin layer.

Optionally, the reflective layer is a fluorine-containing black perylene pigment layer.

Optionally, the prism structure is an array formed by a plurality of triangular pyramids.

Optionally, the three base angles of the triangular pyramid are different in angle.

Optionally, the photovoltaic module includes: and the bonding position of the bonding layer and the surface of the light-transmitting backboard corresponds to the gap between adjacent battery pieces in the battery piece layer.

It can be seen that the utility model comprises glass, a first encapsulated EVA, a battery piece layer, a second encapsulated EVA, a gap reflective film and a light-transmitting backboard which are arranged in sequence; the gap light reflecting film includes: the reflecting layer, the prism structure, the substrate layer and the bonding layer are sequentially arranged; the bonding layer is arranged on the surface of the substrate layer, which is away from the prism structure; the bonding layer is bonded with the surface of the light-transmitting backboard; the reflecting layer is a fluorine-containing organic pigment layer. According to the utility model, the gap reflective film with the specific color system consistent with the battery piece is stuck on the transparent backboard, and the prism structural design of the surface of the substrate layer in the gap reflective film is matched with the fluorine-containing organic pigment as the reflective layer, so that the transparent backboard has good reflection performance and weather resistance, can directionally reflect sunlight, is further absorbed by the battery piece, increases the utilization of light by the component, and effectively improves the power of the component; and the pigment can be prepared into chromaticity at will, and the selectivity is higher for any battery collocation and customer requirements.

Drawings

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

FIG. 1 is a schematic view of a cross-sectional structure of a gap reflective film provided by the utility model;

FIG. 2 is a schematic diagram showing the structural details of a triangular prism on the surface of a gap reflective film;

FIG. 3 is a schematic view of the overall structure of the surface of the gap reflective film provided by the utility model;

FIG. 4 is a microscopic view of the surface of the gap retroreflective sheeting of the present utility model;

FIG. 5 is a schematic diagram of the film sticking position of the gap reflective film assembly provided by the utility model;

FIG. 6 is a schematic diagram of a post-lamination aperture provided by the present utility model;

FIG. 7 is a schematic view of EVA adhesive tape structure provided by the utility model;

FIG. 8 is a schematic view of the EVA tape-sticking position provided by the utility model;

fig. 9 is a schematic structural diagram of a photovoltaic module provided by the present utility model.

The reference numerals are explained as follows:

1-glass; 2-first encapsulating EVA; 3-a battery sheet layer; 4-second encapsulating EVA; 11-a reflective layer; 12-prism structure; 13-a substrate layer; a 14-black fluorine coating; 15-a tie layer; 21-the upper surface of the substrate layer; 22/23/24-triangular pyramid sides; 51-glass back plate; 52-a gap light reflecting film; 61-opening holes; 71-substrate layer EVA; 72-pressure sensitive adhesive; 81-EVA adhesive tape; 82-battery string.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a gap reflective film according to the present utility model. The photovoltaic module of this embodiment may include a glass 1, a first packaged EVA2, a battery sheet layer 3, a second packaged EVA4, a gap reflective film 52, and a light-transmitting back plate, which are sequentially disposed;

the gap light reflecting film 52 includes: the reflecting layer 11, the prism structure 12, the base material layer 13 and the bonding layer are sequentially arranged; the bonding layer is arranged on the surface of the substrate layer 13, which is away from the prism structure 12; the bonding layer is bonded with the surface of the light-transmitting backboard; the reflective layer 11 is a fluorine-containing organic pigment layer.

By applying the photovoltaic module provided by the embodiment of the utility model, the gap reflective film 52 with the specific color system consistent with the battery piece is stuck on the transparent backboard, and the prism structure 12 design of the surface of the substrate layer 13 in the gap reflective film 52 is matched with the fluorine-containing organic pigment as the reflective layer 11, so that the photovoltaic module has good reflection performance and weather resistance, can directionally reflect sunlight, is further absorbed by the battery piece, increases the utilization of the module to light, and effectively improves the power of the module; and the pigment can be prepared into chromaticity at will, and the selectivity is higher for any battery collocation and customer requirements.

In the existing full-black double-glass photovoltaic module, the black glazed grid glass has very little performance on module power gain and single color allocation. The fluorine coating layer on the surface of the intermediate reflective film 52 in this embodiment, together with the organic pigment, i.e. the fluorine-containing organic pigment layer is used as the reflective layer 11, has high infrared reflection performance, low visible light reflection performance and excellent weather resistance. It should be noted that adding an organic pigment to a certain material belongs to a common technical means in the prior art. The embodiment is not limited to the specific kind of the reflective layer 11, and the reflective layer 11 may be selected according to the chromaticity of the actual needs, for example, the reflective layer 11 may be a fluorine-containing black perylene pigment layer. The organic pigment in the fluorine-containing black perylene pigment layer is heterocyclic compound black perylene pigment, and the main component of the organic pigment is perylene imide derivative pigment. It should be noted that, the chromaticity of the reflective layer 11 in this embodiment may be selected according to the actual production requirement, and the color of the battery plate may be appropriately selected, so that the application range is wider.

The present embodiment is not limited to a specific kind of the prism structure 12, and may be, for example, the prism structure 12 formed on the surface of the base material layer 13 by a pressing roller; it is also possible to add prism structures 12 additionally to the surface of the substrate layer 13 by other means. The specific shape of the prism structure 12 is not limited in this embodiment, as long as the incident light is reflected to the surface of the battery sheet, for example, the prism structure 12 may be an array composed of a plurality of triangular pyramids. An array formed by a plurality of triangular pyramids forms a triangular pyramid prism structure. It should be noted that, in this embodiment, a triangular prism structure with a unique design is formed on the surface of the substrate layer 13 of the gap reflective film 52, and the light can be effectively reflected to the surface of the battery plate in a directional manner by matching with the surface reflective layer 11, so that the light utilization rate is improved, and the power of the assembly is increased. The embodiment is not limited to a specific angle of each base angle of the triangular pyramid in the prism structure 12, and may be specifically designed according to the typesetting, the installation area and the installation mode of the actual photovoltaic module, for example, the angles of the three base angles of the triangular pyramid may be the same; the angles of the three base angles of the triangular pyramid may also be different.

The specific type of the base material layer 13 is not limited in this embodiment, as long as the supporting effect of the gap reflective film 52 is ensured, and for example, the base material layer 13 may be made of PET (Polyethylene terephthalate ). Further, in order to absorb the ultraviolet light reflected by the ground, the substrate layer 13 is protected to maintain a good supporting effect in the life cycle of the assembly, and the gap reflective film 52 in this embodiment may further include: a black fluorine coating layer 14; the black fluorine coating layer 14 is provided on the surface of the base material layer 13 near the adhesive layer. Further, for the black fluorine coating 14, the black fluorine coating 14 may be a black acrylic uv curable resin layer due to slightly lower requirements for color and weather resistance; the black acrylic ultraviolet light curing resin layer comprises acrylic ultraviolet light curing resin and black toner, and the substrate layer 13 is protected, so that the whole appearance of the photovoltaic module is uniform black, elegant and attractive.

The embodiment is not limited to a specific kind of the adhesive layer, as long as the adhesive layer is ensured to be able to adhere to the surface of the light-transmitting backsheet, and for example, the adhesive layer may be an EVA (Ethylene Vinyl Acetate Copolymer, ethylene-vinyl acetate copolymer) layer. The specific position where the adhesive layer is adhered to the surface of the light-transmitting back plate is not limited in this embodiment as long as it is ensured that the gap light-reflecting film 52 can reflect light incident from the gap between adjacent cells, for example, the position where the adhesive layer is adhered to the surface of the light-transmitting back plate may correspond to the gap between adjacent cells in the cell layer 3. It should be noted that, in the present embodiment, the battery strings 82 are connected by using a solder strip, and the battery plate or solder strip may contact the gap reflective film 52 during the manufacturing process, and the risk of short-circuit failure of the assembly may be reduced because the surface of the gap reflective film 52 is non-conductive.

The specific type of the transparent back sheet is not limited in this embodiment, as long as the light can be incident into the photovoltaic module, and for example, the transparent back sheet may be a glass back sheet 51. Further, in order to facilitate the photovoltaic module to draw out the bus bar, in this embodiment, the light-transmitting back plate and the gap reflective film 52 are provided with openings 61 at positions corresponding to the hole sites; the hole sites are the locations from which the bus bars are drawn.

The positioning adhesive tape used in the packaging process of the photovoltaic module mainly takes weather-resistant PET as a base material, and after packaging, adhesive tape marks still exist at the positions of the adhesive tape. Further, in order to reduce the print generated by the positioning tape after lamination, the photovoltaic module of this embodiment includes: positioning adhesive tapes connecting adjacent battery strings 82 in the battery sheet layer 3; the positioning tape may be EVA tape 81. The embodiment is not limited to the specific structure of the EVA tape 81, as long as the EVA tape 81 is ensured to be capable of being fused with the first packaged EVA2 after lamination while the cell string 82 is fixed to reduce the offset, so as to achieve the effect of invisible traceless, for example, the EVA tape 81 may include a substrate layer EVA71 and a pressure sensitive adhesive 72; the pressure sensitive adhesive 72 is disposed on the surface of the substrate layer EVA71 adjacent to the battery string. The EVA tape 81 uses a release film as a release layer adhesive tape. The release film is removed in the production process, and the EVA adhesive tape 81 is adhered between the specific battery strings 82, so that the offset risk of the battery strings 82 can be reduced. The EVA adhesive tape 81 can be perfectly combined with various polyolefin adhesive films, has good affinity, can be fused with the first packaged EVA2 in the lamination process, achieves the invisible effect, and reduces the appearance defects of the all-black assembly. The embodiment is not limited to a specific kind of the pressure-sensitive adhesive 72, and for example, the pressure-sensitive adhesive 72 may be an adhesive such as acrylic.

It should be noted that the present embodiment can be applied to all photovoltaic modules, and can be applied to single-double-glass photovoltaic modules with different formats and different battery plates in combination with the gap reflective film 52. The EVA tape 81 can be applied to all photovoltaic module positioning battery strings 82. The power of the photovoltaic module is higher and the appearance is more exquisite by comprehensive collocation.

In order to facilitate understanding of the present utility model, the working principle of each part of the structure of the photovoltaic module provided by the embodiment of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a gap reflective film according to the present utility model. The structure of the gap reflective film 52 mainly includes, from top to bottom, a reflective layer 11, a substrate layer 13, a black fluorine coating layer 14, and an adhesive layer. Specifically, the reflective layer 11 is mainly fluorine-containing black perylene pigment, has excellent reflective performance and good weather resistance, is uniformly coated on the surface of the substrate layer 13, and the substrate layer 13 is made of PET (polyethylene terephthalate). And the prism structures 12 on the upper surface 21 of the substrate layer are triangular pyramid prism structures distributed in an array. The black fluorine coating 14 is mainly used for absorbing ultraviolet light and protecting the substrate layer 13, so that the substrate layer still has good supporting effect in the life cycle of the component. The adhesive layer is mainly EVA, and can be melted rapidly by heating, so that the reflective gap film is adhered to the surface of the glass back plate 51.

Referring to fig. 2, fig. 2 is a schematic diagram showing the details of the triangular prism structure on the surface of the gap reflective film provided by the utility model. The upper and lower surfaces of the substrate layer 13 are smooth, a triangular pyramid prism structure is formed on the upper surface 21 of the substrate layer by a press roller, and 22/23/24 is a triangular pyramid side surface. A schematic diagram of the overall distribution of the upper surface 21 of the substrate layer is formed as shown in fig. 3. The microscopic view of the surface of the gap reflection film 52 is shown in fig. 4, so that the surface structure of the gap reflection film 52 can be better and intuitively understood.

Referring to fig. 5, fig. 5 is a schematic diagram of a film pasting position of a gap reflective film assembly provided by the utility model. The gap reflective film 52 is stably adhered to the surface of the glass back plate 51 to form a gap reflective film belt according to typesetting requirements of battery pieces in the photovoltaic module by film adhering equipment in a transverse and longitudinal film adhering mode.

Referring to fig. 6, fig. 6 is a schematic diagram of a post-lamination hole provided by the present utility model. Since the bus bar is led out, the gap reflective film 52 at the position corresponding to the hole position of the glass back plate 51 is removed, and the holes 61 are formed on the glass back plate 51 and the gap reflective film 52. Specifically, the hole forming mode can remove the gap reflective film 52 by high energy of laser, and can also be manually removed by corresponding tooling operation. After the film is removed, a complete film-sticking glass back plate 51 can be formed, the film-sticking surface is downward after the film is turned over, the film can be laid with the conventional photovoltaic module process flow, and the gap reflective film strips can be uniformly distributed around the battery piece, so that the effects of synergism and attractive appearance are achieved.

Referring to fig. 7, fig. 7 is a schematic structural diagram of an EVA tape according to the present utility model. Acrylic acid as the pressure sensitive adhesive 72 is uniformly coated on the substrate layer EVA71, i.e., the EVA tape 81 is formed. Wherein EVA is ethylene-vinyl acetate copolymer formed by ethylene and vinyl acetate through copolymerization. In the laying process, the battery string 82 is positioned through the EVA adhesive tape 81, the adhering position of the EVA adhesive tape 81 is shown in fig. 8, the film-attached glass back plate 51/glass sealing cover is laminated, the film-attached glass back plate 51/glass sealing cover can be melted at 145 ℃, the EVA adhesive tape 81 and the first packaged EVA are fused, and the invisible effect is achieved after cooling.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a photovoltaic module provided by the present utility model. The photovoltaic module comprises glass 1, a first packaging EVA2, a battery piece layer 3, a second packaging EVA4, a gap reflecting film 52 and a glass backboard 51 which are sequentially arranged. Sunlight enters the photovoltaic module, is reflected by the gap reflective film 52 stuck on the surface of the glass back plate 51, is reflected to the surface of the battery piece through the glass 1, and is absorbed by the battery piece.

By applying the photovoltaic module provided by the embodiment of the utility model, the gap reflective film 52 with the specific color system consistent with the battery piece is stuck on the glass backboard 51, and the triangular pyramid prism structure design of the surface of the substrate layer 13 in the gap reflective film 52 is matched with the fluorine-containing organic pigment as the reflective layer 11, so that the photovoltaic module has good reflection performance and weather resistance, can directionally reflect sunlight, can be absorbed by the battery piece, can increase the utilization of the module to light, and can effectively improve the power of the module; and the pigment can be prepared into chromaticity at will, and the selectivity is higher for any battery collocation and customer requirements. Meanwhile, the EVA adhesive tape 81 is adopted, ethylene-vinyl acetate copolymer foamed by ethylene and vinyl acetate is taken as a substrate, acrylic acid is taken as the pressure-sensitive adhesive 72, the battery string 82 is fixed to reduce offset, and meanwhile, the EVA adhesive tape can be fused with the first packaging EVA2 after lamination, so that the invisible traceless effect is achieved, and the whole assembly is more attractive and free. The whole photovoltaic module has higher power, elegant appearance and more beautiful and flawless appearance.

The above description of the photovoltaic module according to the present utility model is provided in detail, and those skilled in the art will appreciate that the present utility model is not limited to the specific embodiments and application ranges given by the above description.

Claims

1. A photovoltaic module, comprising: the glass, the first packaging EVA, the battery piece layer, the second packaging EVA, the gap reflective film and the light-transmitting backboard are sequentially arranged;

2. The photovoltaic module according to claim 1, wherein the light transmissive backsheet and the gap reflective film are provided with openings at positions corresponding to the hole sites; the hole sites are the locations from which the bus bars are drawn.

3. The photovoltaic module of claim 1, comprising: positioning adhesive tapes for connecting adjacent battery strings in the battery sheet layer; the positioning adhesive tape is EVA adhesive tape.

4. The photovoltaic module of claim 3, wherein the EVA tape comprises a substrate layer EVA and a pressure sensitive adhesive; the pressure sensitive adhesive is arranged on the surface of the substrate layer EVA, which is close to the battery string.

5. The photovoltaic module of claim 1, wherein the gap reflector film further comprises: a black fluorine coating; the black fluorine coating is arranged on the surface of the substrate layer, which is close to the bonding layer.

6. The photovoltaic module of claim 5, wherein the black fluorine coating is a black acrylic uv curable resin layer.

7. The photovoltaic module of claim 1, wherein the reflective layer is a fluorine-containing black perylene pigment layer.

8. The photovoltaic module of claim 1, wherein the prismatic structure is an array of triangular pyramids.

9. The photovoltaic module of claim 8, wherein the three base angles of the triangular pyramids are different in angle.

10. The photovoltaic module of claim 1, comprising: and the bonding position of the bonding layer and the surface of the light-transmitting backboard corresponds to the gap between adjacent battery pieces in the battery piece layer.