CN201387885Y - Insulated backsheet for solar photovoltaic modules - Google Patents

Abstract

The utility model relates to an insulating backboard for a solar photovoltaic module, which belongs to electrical insulation materials. It includes a PET film layer, a first PVDF material layer and a second PVDF material layer, the first PVDF material layer and the second PVDF material layer are respectively located on the upper and lower surface planes of the PET film layer, and are connected with the PET film layer Integrate into one through the glue layer. Advantages: Since the upper and lower surface planes of the PET film layer are respectively compounded with PVDF material layers through adhesives, this multi-layer composite structure has good weather resistance and aging resistance, excellent insulation performance, strong anti-pollution ability and water vapor The transmittance is small, the partial discharge capacity is more than 1000V, and the service life of the product can reach more than 25 years.

Description

Insulated backsheet for solar photovoltaic modules

technical field

The utility model belongs to electrical insulating materials, in particular to an insulating backboard for solar photovoltaic components.

Background technique

As we all know, solar photovoltaic modules are composed of solar glass, cells, hot-melt adhesive (EVA), aluminum frame and insulating backplane, wherein the insulating backplane is located at the bottom of the cells and the connector connection for solar cell insulation protection. The insulating backplane structure in the prior art is generally sprayed with fluorine-based materials on the outside of a single-layer polyethylene terephthalate (PET) film layer. The problems of this single-layer backplane structure in actual use are: Poor aging resistance, short service life, high water vapor permeability and low partial discharge power.

Contents of the invention

The purpose of the utility model is to provide an insulating backboard for solar photovoltaic modules with good aging resistance, long service life, excellent insulation performance, low water vapor transmission rate, high partial discharge power and strong anti-pollution ability.

The purpose of this utility model is achieved in this way, an insulating backboard for solar photovoltaic modules, which is characterized in that it includes a PET film layer, a first PVDF material layer and a second PVDF material layer, and the first PVDF material layer The first layer and the second PVDF material layer are respectively located on the upper and lower surface planes of the PET film layer, and are integrated with the PET film layer through a glue layer.

The PET in the PET film layer described in the utility model refers to polyethylene terephthalate.

The PVDF in the first PVDF material layer and the second PVDF material layer in the utility model refers to polyvinylidene fluoride.

The glue in the glue layer described in the utility model is polyurethane adhesive.

The utility model has beneficial effects after adopting the above structure: since the upper and lower surface planes of the PET film layer are respectively compounded with PVDF material layers through the adhesive, this multi-layer composite structure has good weather resistance and aging resistance High performance, excellent insulation performance, strong anti-fouling ability and low water vapor transmission rate, partial discharge capacity > 1000V, and the service life of the product can reach more than 25 years.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

In the figure: 1. PET film layer; 2. Glue layer; 3. The first PVDF material layer; 4. The second PVDF material layer.

Detailed ways

In order to enable the examiners of the patent office, especially the public, to more clearly understand the technical essence and beneficial effects of the present utility model, the applicant will describe in detail below in conjunction with the accompanying drawings in the form of embodiments, but none of the descriptions of the embodiments is As for the limitation of the solution of the utility model, any equivalent transformation made according to the idea of the utility model is only in form but not in substance shall be regarded as the scope of the technical solution of the utility model.

Please refer to the accompanying drawings, the insulating backboard for solar photovoltaic modules of the present invention includes a PET film layer 1, a first PVDF material layer 3 and a second PVDF material layer 4, and the PET in the PET film layer 1 refers to polyparaphenylene Ethylene glycol diformate, the PVDF in the first PVDF material layer 3 and the second PVDF material layer 4 refers to polyvinylidene fluoride, the first PVDF material layer 3 and the second PVDF material layer 4 are respectively located in PET The upper and lower surface planes of the film layer 1 are integrated with the PET film layer 1 through the glue layer 2, and the glue in the glue layer 2 is polyurethane adhesive.

The utility model is an insulating backboard for a solar photovoltaic module composed of the above-mentioned multi-layer materials through dry compounding, and its finished product is in the shape of a rolled film. When in use, unroll the film-shaped insulating backsheet, cut it into a sheet with the same size as the solar cell, then place the insulating backsheet under the solar cell and combine it with solar glass, hot melt adhesive (EVA) and Aluminum frames are combined to form solar photovoltaic modules.

Due to the addition of an insulating backplane, the above-mentioned solar photovoltaic modules insulate and protect the power supply after the solar cells work, which greatly reduces the potential safety hazards of the solar photovoltaic modules, makes them more reliable, and prolongs the life of solar equipment. reach more than 25 years.

Claims (4)

1, a kind of solar photovoltaic assembly insulating back panel, it is characterized in that it comprises PET thin layer (1), a PVDF material layer (3) and the 2nd PVDF material layer (4), a described PVDF material layer (3) and the 2nd PVDF material layer (4) lay respectively on the upper and lower table plane of PET thin layer (1), and and PET thin layer (1) between be combined as a whole by glue layer (2).

2, solar photovoltaic assembly insulating back panel according to claim 1 is characterized in that the PET in the described PET thin layer (1) is meant PETG.

3, solar photovoltaic assembly insulating back panel according to claim 1 is characterized in that the PVDF in a described PVDF material layer (3) and the 2nd PVDF material layer (4) is meant polyvinylidene fluoride.

4, solar photovoltaic assembly insulating back panel according to claim 1 is characterized in that the glue in the described glue layer (2) is polyurethane adhesive.

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