CN203536454U - Thin-film solar cell backboard with high moisture blocking properties - Google Patents

Abstract

The utility model provides a thin-film solar cell backboard with high moisture blocking properties. The backboard comprises a PET film intermediate layer and outer layers on two sides of the intermediate layer. A glass film is arranged between the PET film intermediate layer and one of the outer layers, and covers the PET film intermediate layer. According to the thin-film solar cell backboard provided by the utility model, the glass film with high blocking properties and high insulativity is arranged between the PET film intermediate layer and the outer layer, and covers the PET film intermediate layer, so that the solar cell is effectively protected from erosion caused by moisture and environment, and the phenomena of partial discharge and electric leakage of the conventional aluminum foil backboard are prevented, providing high safety.

Description

A kind of backboard of high water vapor rejection thin-film solar cells

Technical field

The utility model relates to technical field of solar batteries, particularly, relates to a kind of backboard of high water vapor rejection thin-film solar cells.

Background technology

The energy is the lifeblood of economic development.Due to increasing the weight of of environmental pollution and gradually reducing of the fossil energies such as coal, oil and natural gas, various countries greatly develop the various new energy technologies such as nuclear energy, wind energy, combustible ice, hydrogen energy source in succession.In the above energy, the various advantages such as solar energy is clean because having, inexhaustible, nexhaustible, exploitation convenience are pursued energetically.Especially, after the nuclear leakage crisis that Japanese violent earthquake in 2011 causes, the country such as Japanese, German determines to close down nuclear power station in succession, and enables one after another the popularization that subsidy policy promotes photovoltaic industry, makes solar energy power generating again become the focus that industry is paid close attention to.China, as the maximum solar module producing country in the whole world, has formed in areas such as the Yangtze River Delta, Pearl River Delta, the ring Bohai Sea and Midwest the solar energy industry cluster differing from one another.Meanwhile, also carry out energetically distributed photovoltaic power generation, setting up various photovoltaic pooled applications demonstration area.

Solar-photovoltaic technology is divided into crystal silicon, film and three parts of condensation photovoltaic at present.Wherein, thin-film solar cells is manufactured owing to working as substrate with different materials such as cheap glass, plastics, pottery, graphite and sheet metals, and electric layer only needs several microns, 1/100 of not enough crystal silicon solar energy battery thickness, cost reduces greatly, and production process is simplified, and can make pliability solar cell and install for curved surface, therefore extensively paid attention to and greatly developed, time solar cell of generation of being known as, prospect is extremely wide.Yet thin-film solar cells is very responsive to steam, is easy to reduce rapidly because steam causes generating efficiency, this has extremely low moisture permeability with regard to requiring for the back veneer material of packaging film solar cell.Traditional thin-film solar cells encapsulating material is generally used the glass that moisture permeability is extremely low, utilizes glass front plate and glass back plate to make so-called pair of glass assembly, due to the high barrier of glass, is greatly improved in the life-span of the two glass assemblies of hull cell.But glass back plate is heavier, be unfavorable for operation, also cannot realize curved surface and install.Used afterwards the plastic polymer backboard containing aluminium foil type, the structure of this kind of backboard is generally: fluorine film/aluminium foil/PET film/fluorine film, or fluorine film/aluminium foil/PET/EVA etc., though this kind of backboard can reduce moisture-vapor transmission, improve water vapor barrier property, but because the thickness of the fluorine film of aluminum foil outer layer is below 40 microns, so insulation effect is relatively poor, if fluorine rete has breakage, easily cause the generation of partial discharge, leaky.

Therefore, how to obtain that a kind of moisture-vapor transmission is low, water vapor rejection performance is high, and safe backboard, make its encapsulation that can be used for thin-film solar cells, be the problem that this area research person institute wish solves.

Utility model content

In order to solve the problems of the technologies described above; the utility model provides a kind of backboard of high water vapor rejection thin-film solar cells; between PET film intermediate layer and skin, be provided with glass rete; this glass-film has high barrier and insulating properties; can effectively protect solar cell not to be subject to the erosion of steam, environment; partial discharge, the leaky of having avoided tradition may occur containing aluminium foil type backboard, safe.

The technical solution of the utility model is as follows: a kind of backboard of high water vapor rejection thin-film solar cells, the skin with PET film intermediate layer and its two side faces, described PET film intermediate layer and be wherein also provided with the glass-film that covers described PET film intermediate layer between a side skin.

Described glass-film thickness is 10-50um.

The skin of the glass-film side in described PET film intermediate layer is the fluorine coating of fluorine film, the PET of resistance to ultraviolet film or coating, and the skin of the another side in described PET film intermediate layer is fluorine coating or the EVA film of fluorine film, the PET of resistance to ultraviolet film, coating.

Bonding by adhesive between described fluorine film, the described PET of resistance to ultraviolet film, described EVA film or described glass-film and described PET film intermediate layer; Bonding by adhesive between described fluorine film, the described PET of resistance to ultraviolet film and described glass-film.

Described fluorine film is polyvinyl fluoride, polyvinylidene fluoride, chlorotrifluoroethylene, ethylene-tetrafluoroethylene copolymer, ethylene-chlorotrifluoro-ethylene copolymer, perfluoroethylene-propylene copolymer and hexafluoropropylene (HFP)/tetrafluoroethylene (TFE)-vinylidene fluoride copolymers.

In described EVA film, vinyl acetate (VA) mass content is 0-35%.

The beneficial effects of the utility model are: the backboard of high water vapor rejection thin-film solar cells described in the utility model; there is high water vapor rejection and insulating properties; can effectively protect solar cell not to be subject to the erosion of steam, environment; partial discharge, the leaky of having avoided tradition may occur containing aluminium foil type backboard, safe.

Accompanying drawing explanation

Backboard embodiment mono-structural representation of Fig. 1 high water vapor rejection thin-film solar cells described in the utility model.Backboard embodiment bis-structural representations of Fig. 2 high water vapor rejection thin-film solar cells described in the utility model.The backboard of Fig. 3 high water vapor rejection thin-film solar cells described in the utility model is executed example three structural representations.Backboard embodiment tetra-structural representations of Fig. 4 high water vapor rejection thin-film solar cells described in the utility model.Backboard embodiment five structural representations of Fig. 5 high water vapor rejection thin-film solar cells described in the utility model.

Embodiment

With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a kind of backboard of high water vapor rejection thin-film solar cells, has the skin 40 of PET film intermediate layer 10 and its two side faces.Between PET film intermediate layer 10 and wherein one side skin 40, be provided with glass-film 30.

Described glass-film thickness is 10-50um.

Described outer 40 is fluorine film, the PET of resistance to ultraviolet film.Described fluorine film is polyvinyl fluoride, polyvinylidene fluoride, chlorotrifluoroethylene, ethylene-tetrafluoroethylene copolymer, ethylene-chlorotrifluoro-ethylene copolymer, perfluoroethylene-propylene copolymer and hexafluoropropylene (HFP)/tetrafluoroethylene (TFE)-vinylidene fluoride copolymers.

With reference to Fig. 1, in this embodiment, described outer 40 of described PET film intermediate layer 10 two side faces are fluorine film.Described outer 40 and described PET film intermediate layer 10 between, described outer 40 and described glass-film 30 between, and all by adhesive 20, bond between described glass-film 30 and described PET film intermediate layer 10.

With reference to Fig. 2, in this embodiment, described outer 40 of described glass-film 30 lateral surfaces are the PET of resistance to ultraviolet film.Described outer 40 of 10 another sides, described PET film intermediate layer are fluorine coating.Between the described PET of resistance to ultraviolet film and described glass-film 30, by adhesive 20, bond.Between described PET film intermediate layer 10 and described glass-film 30, by adhesive 20, bond.Described fluorine coating is directly coated on described PET film intermediate layer 10.

With reference to Fig. 3, in this embodiment, described outer 40 of described glass-film 30 lateral surfaces are fluorine coating, and described outer 40 of 10 1 sides, described PET film intermediate layer are the PET of resistance to ultraviolet film.Between described glass-film 30 and the described PET of resistance to ultraviolet film and described PET film intermediate layer 10, all by adhesive 20, bond.Described fluorine coating is directly coated on described glass-film 30.

With reference to Fig. 4, in this embodiment, described outer 40 of described PET film intermediate layer 10 two side faces are fluorine coating.Described fluorine coating be directly coated on described glass-film 30 and described PET film intermediate layer on.Between described glass-film 30 and described PET film intermediate layer, by adhesive 20, bond.

With reference to Fig. 5, in this embodiment, described outer 40 of 10 1 sides, described PET film intermediate layer are the PET of resistance to ultraviolet film.Described outer 40 of another side is EVA film.Between the described PET of resistance to ultraviolet film and described glass-film 30, all by adhesive 20, bond.Between described glass-film 30 and described EVA film and described PET film intermediate layer 10, by adhesive 20, bond.

Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, its framework form can be flexible and changeable, can subseries product.Just make some simple deduction or replace, all should be considered as belonging to the utility model by the definite scope of patent protection of submitted to claims.

Claims (4)

1. a backboard for high water vapor rejection thin-film solar cells, has the skin of PET film intermediate layer and its two side faces, it is characterized in that described PET film intermediate layer and be wherein also provided with the glass-film that covers described PET film intermediate layer between a side skin.

2. the backboard of high water vapor rejection thin-film solar cells as claimed in claim 1, is characterized in that, described glass-film thickness is 10-50um.

3. the backboard of high water vapor rejection thin-film solar cells as claimed in claim 1, it is characterized in that, the skin of the glass-film side in described PET film intermediate layer is the fluorine coating of fluorine film, the PET of resistance to ultraviolet film or coating, and the skin of the another side in described PET film intermediate layer is fluorine coating or the EVA film of fluorine film, the PET of resistance to ultraviolet film, coating.

4. the backboard of high water vapor rejection thin-film solar cells as claimed in claim 3, is characterized in that, bonding by adhesive between described fluorine film, the described PET of resistance to ultraviolet film, described EVA film or described glass-film and described PET film intermediate layer; Bonding by adhesive between described fluorine film, the described PET of resistance to ultraviolet film and described glass-film.

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