CN210167364U

CN210167364U - Light flexible photovoltaic module

Info

Publication number: CN210167364U
Application number: CN201921480170.9U
Authority: CN
Inventors: 吴韦; 刘志锋; 林建伟
Original assignee: Taizhou Zhonglai Optoelectronics Technology Co Ltd
Current assignee: Taizhou Zhonglai Optoelectronics Technology Co Ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-03-20
Anticipated expiration: 2029-09-06

Abstract

The utility model provides a light flexible photovoltaic assembly, which comprises a TFB film layer, a water-blocking film layer, a composite glass fiber layer, a battery string and an FFC double-sided fluorine-containing back film layer from top to bottom, wherein the TFB film layer and the water-blocking film layer, the water-blocking film layer and the composite glass fiber layer, the composite glass fiber layer and the battery string and the FFC double-sided fluorine-containing back film layer are connected through EVA films; coating liquid is sprayed on one side of the TFB film layer far away from the water blocking film layer, and the water blocking film layer sequentially comprises an EVA adhesive layer, a PET film layer, a high barrier layer, a PE protective layer and an EVA adhesive layer from top to bottom. The utility model discloses not only reduce photovoltaic module's weight to 3.5 kg/square meter for it bears the requirement that requires far less than conventional subassembly to the roof, makes photovoltaic module have the flexibility moreover, can install on the curved surface roof, when the installation, need not to use the installing support to install, only needs the installation adhesive tape on the installation face, can realize photovoltaic module's installation, and its mounted position is unrestricted.

Description

Light flexible photovoltaic module

Technical Field

The utility model relates to a photovoltaic module technical field, concretely relates to flexible photovoltaic module of light.

Background

At present, most solar cell modules in the market are fixed and installed through a bracket, and can only be installed in a plane area. The installation cost for installing and fixing the photovoltaic module through the bracket is high, and the installation position is relatively fixed; in addition, the surface of the conventional photovoltaic module is packaged by using glass, so that the weight of the photovoltaic module per se is 12kg per square meter, which has certain requirement on the bearing capacity of a roof.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide a flexible photovoltaic module of light, its technical scheme is:

the photovoltaic module sequentially comprises a TFB film layer, a water-blocking film layer, a composite glass fiber layer, a battery string and an FFC double-sided fluorine-containing back film layer from top to bottom, wherein the TFB film layer and the water-blocking film layer, the water-blocking film layer and the composite glass fiber layer, the composite glass fiber layer and the battery string and the FFC double-sided fluorine-containing back film layer are connected through EVA films; coating liquid is sprayed on one side of the TFB film layer, which is far away from the water blocking film layer, and the water blocking film layer sequentially comprises an EVA adhesive layer, a PET film layer, a high-barrier layer, a PE protective layer and an EVA adhesive layer from top to bottom.

The utility model provides a pair of flexible photovoltaic module of light still includes following subsidiary technical scheme:

wherein, the side of the FFC double-sided fluorine-containing back film layer far away from the battery string is provided with an aluminum foil.

And the aluminum foil is adhered to one side of the fluorine-containing back film layer far away from the battery string through an electrochemical method.

The utility model discloses an implement including following technological effect:

the utility model provides a light flexible photovoltaic module, through replacing the cover plate of the conventional photovoltaic module with the TFB film layer in the application by glass, and the side of keeping away from the compound glass fiber layer on the TFB film layer is sprayed with the coating liquid, thereby not only reducing the weight of the photovoltaic module of the application, but also ensuring that the photovoltaic module has flexibility and can be installed on a curved roof; the coating liquid can fill pits on the TFB film layer, so that the side, in contact with the outside, of the TFB film layer becomes flat and smooth, the light permeability increasing performance is improved, and the optical permeability of the cover plate is increased to be more than 2%; the PET rete in the water blocking film can reduce surface energy, reduces the adhesion of dust, makes the dust take away easily by wind, and can effectively prevent water vapor permeation.

And, flexible photovoltaic module of light in this application need not to use the installing support to install when the installation, only needs to install the adhesive tape on the installation face, can realize photovoltaic module's installation, and its mounted position is unrestricted, and because photovoltaic module's weight reduces to 3.5 kg/square meter in this application, consequently, its requirement is less than conventional subassembly requirement far away to the roof bearing.

Drawings

Fig. 1 is a schematic structural view of the light flexible photovoltaic module of the present invention.

In the figure, 1-TFB film layer, 2-water-resistant film, 3-composite glass fiber layer, 4-battery string, 5-FFC double-sided fluorine-containing back film layer and 6-EVA film.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

As shown in fig. 1, the utility model provides a pair of light flexible photovoltaic module, photovoltaic module includes TFB rete 1, water-blocking rete 2, compound glass fiber layer 3, battery cluster 4 and FFC two-sided fluorine-containing back membrane layer 5 from last to down in proper order, TFB rete 1 and water-blocking rete 2, water-blocking rete 2 and compound glass fiber layer 3, compound glass fiber layer 3 and battery cluster 4, and battery cluster 4 and FFC two-sided fluorine-containing back membrane layer 5 all connect through EVA film 6; coating liquid is sprayed on one side, far away from the water blocking film layer 2, of the TFB film layer 1, and the water blocking film layer 2 sequentially comprises an EVA adhesive layer, a PET film layer, a high barrier layer, a PE protective layer and an EVA adhesive layer from top to bottom.

The TFB film layer sequentially comprises an outer protection layer PVF, a middle layer PET and a fluorine-containing bonding layer from top to bottom.

(1) Outer protective layer PVF — weatherable layer: in order to make the photovoltaic module have good weather resistance, the outer layer material is generally required to contain fluorine, and PVF and PVDF are two well-known weather-resistant high polymer materials, because the C-F bond energy in the outer layer material is 485KJ/mol, the bond energy in organic compound covalent bonds is the largest, only photons with the wavelength less than 220nm can dissociate the C-F bond, and in sunlight, the photons with the wavelength less than 220nm only account for less than 5%, and the few photons with the wavelength less than 220nm are easily absorbed by an ozone layer and can reach the ground very rarely. Therefore, the weather resistance of the photovoltaic module can be greatly improved by providing the PVF protective layer on the outermost layer of the photovoltaic module.

(2) Middle layer PET: the composite material has the advantages of supporting function, high and low temperature resistance, stable mechanical property, excellent electrical insulation, favorable creep resistance, fatigue resistance, friction resistance and dimensional stability, and low gas and steam permeability.

(3) A fluorine-containing bonding layer: since unmodified fluorine-containing films and PET have poor adhesion to EVA, it is necessary to use modified fluorine-containing materials or EVA, PE, and PA films having strong adhesion.

Preferably, an aluminum foil is arranged on one side, far away from the battery string, of the FFC double-sided fluorine-containing back film layer. In the embodiment, the aluminum foil is arranged on the side, far away from the cell string, of the FFC double-sided fluorine-containing back film layer, so that the back surface of the photovoltaic module can also prevent the permeation of water vapor by 100%.

More preferably, the aluminum foil is electrochemically adhered to the fluorine-containing back film layer on a side thereof remote from the cell string.

Preferably, the coating liquid comprises modified silane, ethanol and an additive. Wherein, the additive is an auxiliary agent which can be water, octanol or a mixture of water and octanol, and the mass percentage of the additive is 1.5-2.5%.

Preferably, the EVA film comprises a main material, a light absorber, a light stabilizer, an antioxidant, and a curing agent.

The light stabilizer is bis (2,2,6, 6-tetramethyl-4-piperidyl) sebacate, the antioxidant is tris (nonylphenyl) phosphite, and the curing agent is 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide.

Preferably, the ethylene-vinyl acetate copolymer accounts for 97.8-98% by mass, the 2-hydroxy-4-n-octoxybenzophenone accounts for 0.28-0.32% by mass, the bis (2,2,6, 6-tetramethyl-4-piperidyl) sebacate accounts for 0.08-0.12% by mass, the tris (nonylphenyl) phosphite accounts for 0.18-0.22% by mass, and the 2, 5-dimethyl-2, 5-di-tert-butylperoxyhexane accounts for 1.45-1.55% by mass.

More preferably, the ethylene-vinyl acetate copolymer is 97.9% by mass, the 2-hydroxy-4-n-octoxybenzophenone is 0.3% by mass, the bis (2,2,6, 6-tetramethyl-4-piperidyl) sebacate is 0.1% by mass, the tris (nonylphenyl) phosphite is 0.2% by mass, and the 2, 5-dimethyl-2, 5-di-tert-butylperoxyhexane is 1.5% by mass.

Wherein in the ethylene-vinyl acetate copolymer, the mass percentage of the vinyl acetate is 21%. This example increases the hardness of the PVF film by setting the mass percentage of vinyl acetate in the ethylene-vinyl acetate copolymer to 21%.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A light flexible photovoltaic module characterized in that: the photovoltaic module sequentially comprises a TFB film layer, a water-blocking film layer, a composite glass fiber layer, a battery string and an FFC double-sided fluorine-containing back film layer from top to bottom, wherein the TFB film layer and the water-blocking film layer, the water-blocking film layer and the composite glass fiber layer, the composite glass fiber layer and the battery string and the FFC double-sided fluorine-containing back film layer are connected through EVA films; coating liquid is sprayed on one side of the TFB film layer, which is far away from the water blocking film layer, and the water blocking film layer sequentially comprises an EVA adhesive layer, a PET film layer, a high-barrier layer, a PE protective layer and an EVA adhesive layer from top to bottom.

2. A lightweight flexible photovoltaic module in accordance with claim 1, wherein: and an aluminum foil is arranged on one side of the FFC double-sided fluorine-containing back film layer, which is far away from the battery string.

3. A lightweight flexible photovoltaic module in accordance with claim 2, wherein: the aluminum foil is adhered to one side, far away from the battery string, of the fluorine-containing back film layer through an electrochemical method.