CN203134828U

CN203134828U - Heterogeneous double-face fluorine-containing solar battery backboard

Info

Publication number: CN203134828U
Application number: CN 201320011005
Authority: CN
Inventors: 薛济萍; 王强; 姚元毅; 蒋贤明
Original assignee: Zhong Tian Photovoltaic Materials Co Ltd
Current assignee: Zhong Tian Photovoltaic Materials Co Ltd
Priority date: 2013-01-10
Filing date: 2013-01-10
Publication date: 2013-08-14
Anticipated expiration: 2023-01-10

Abstract

The utility model discloses a heterogeneous double-face fluorine-containing solar battery backboard comprising a fluorine film, an adhensive layer, a thin layer, a primary coat and a coating layer connected in sequence; the fluorine film is a polyvinylidene fluoride film or a polyvinyl fluoride film; the adhensive layer is a polyurethane two-component adhensive; the thin layer is a PET film; the primary coat is a polyurethane adhensive; and the coating layer is a coating paint formed by dispersing base resin and microparticles like polytetrafluoroethylene or polyvinylidene fluoride in a solvent. The heterogeneous double-face fluorine-containing solar battery backboard combines a conventional compound type with a coating type backboard, is low in production cost, alleviates aging speed, improves effective service life of the backboard, and simultaneously improves bonding intensity with an EVA backboard glue film.

Description

A kind of heterogeneous two-sided fluorine-containing type solar cell backboard

Technical field

The utility model relates to a kind of solar cell photovoltaic assembly, is specifically related to a kind of heterogeneous two-sided fluorine-containing type solar cell backboard.

Background technology

Solar cell backboard in the market mainly contains application type and compound two big classes, compound backboard belongs to technology maturation, resistance to ag(e)ing is better, but its cost height, main raw material(s) limited (import) exist and low, the unsettled weakness of solar module packaging adhesive film caking property simultaneously; And the application type backboard has certain price (cost) advantage, production technology simple, but its long-term result of use is relatively poor, especially at ultraviolet irradiation intensity big or wind less bigger its shortcoming of zone be completely exposed.For guaranteeing that backboard possesses certain ageing-resistant performance, reduce cost simultaneously, single face fluorine film back plate design has appearred, and the more two-sided fluorine-containing type of its weather resistance is poor, can not satisfy the long-term use in outdoor awful weather area.

The utility model content

The utility model purpose: the purpose of this utility model is in order to solve deficiency of the prior art, provides that a kind of production cost is low, the heterogeneous two-sided fluorine-containing type solar cell backboard of long service life.

Technical scheme: a kind of heterogeneous two-sided fluorine-containing type solar cell backboard described in the utility model, described backboard comprise fluorine rete, adhesive layer, thin layer, priming coat and the coat that connects successively.

As preferably, described fluorine rete is polyvinylidene fluoride film or pvf film.

As preferably, the thickness of described fluorine rete is the 20-30 micron.

As preferably, described adhesive layer is the polyurethane bicomponent adhesive.

As preferably, the thickness of described adhesive layer is the 5-30 micron.

As preferably, described thin layer is pet film, and the thickness of described thin layer is the 100-400 micron.

As preferably, described priming coat is the class adhesive for polyurethane, and the thickness of described priming coat is the 5-30 micron.

As preferably, described coat is that molecule and the base resin of polytetrafluoroethylene or Kynoar is dispersed in the coating coating that forms in the solvent together.

As preferably, the thickness of described coat is the 10-40 micron.

Beneficial effect: the utility model combines traditional compound and application type backboard, and production cost is low, slows down aging speed, has improved the Acceptable life of backboard, has improved the adhesion strength with EVA backboard glued membrane simultaneously.

Description of drawings

Fig. 1 is the sectional structure chart of the utility model backboard.

Fig. 2 is the technological process of production figure of a face of the utility model.

Fig. 3 is the technological process of production figure of another face of the utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

A kind of heterogeneous two-sided fluorine-containing type solar cell backboard as shown in Figure 1, backboard comprises the fluorine rete 1 that connects successively, adhesive layer 2, thin layer 3, priming coat 4 and coat 5, wherein the fluorine rete is polyvinylidene fluoride film or pvf film, the thickness of fluorine rete is the 20-30 micron, adhesive layer is the polyurethane bicomponent adhesive, the thickness of adhesive layer is the 5-30 micron, thin layer is pet film, the thickness of thin layer is the 100-400 micron, and priming coat is the class adhesive for polyurethane, and the thickness of priming coat is the 5-30 micron, coat is that molecule and the base resin of polytetrafluoroethylene or Kynoar is dispersed in the coating coating that forms in the solvent together, and the thickness of coat is the 10-40 micron.

The method of the above-mentioned heterogeneous two-sided fluorine-containing type solar cell backboard of manufacturing as shown in Figures 2 and 3 comprises the steps:

A. the one side at thin layer 3 is coated with the last layer adhesive, carries out drying after gluing is finished;

B. compound one deck fluorine rete 1 on the adhesive of steps A carries out rolling after compound, forms semi-finished product;

C. step B gained semi-finished product are carried out precuring;

D. the another side of the half-finished thin layer 3 after above-mentioned curing is smeared bottom-coating, forms priming coat 4, carries out drying after smearing end;

E. be coated with fluoro-containing coating at priming coat 4, coating is carried out drying, rolling, cutting edge after finishing, is gone to give up, and carries out product inspection at last, the packing shipment.

The utlity model has following outstanding advantage:

A. PVDF or PVF thin layer are placed on the outside, accept the destruction of external environment, coat is placed on innermost layer, with the adhesion strength of improvement with the EVA glued membrane;

B. the application type layer contains fluorine atom, the weatherability aspect is better than the PEVA film certainly, coated side has a large amount of tiny pin holes in addition, the interior heat that can guarantee cell panel is outwards discharged, in addition because EVA glued membrane self thermal stability causes after aging crosslinked and decompose again, the little molecule meeting corrosion cell plate that produces is got rid of so the bigger permeability of coated side can guarantee these little molecules;

C. in order to satisfy the requirement of 25 years useful life, have only the compound backboard energy of KPK type up to standard at present, and PEVA film main component is polyethylene in the KPE backboard, ultraviolet ageing speed is fast, PET protection duration to internal layer is shorter, this has directly caused the useful life of backboard short, yet the destruction that fluorine-containing coating to a certain extent can block ultraviolet has been slowed down rate of ageing;

D. the whole world constantly reduction storm make that the survival ability of photovoltaic industry is more and more lower, become for survival basic satisfying price under the prerequisite of instructions for use, and coat is lower than PVDF film price.

Claims

1. heterogeneous two-sided fluorine-containing type solar cell backboard is characterized in that: described backboard comprises fluorine rete (1), adhesive layer (2), thin layer (3), priming coat (4) and the coat (5) that connects successively.

2. a kind of heterogeneous two-sided fluorine-containing type solar cell backboard according to claim 1, it is characterized in that: described fluorine rete (1) is polyvinylidene fluoride film or pvf film.

3. a kind of heterogeneous two-sided fluorine-containing type solar cell backboard according to claim 1, it is characterized in that: the thickness of described fluorine rete (1) is the 20-30 micron.

4. a kind of heterogeneous two-sided fluorine-containing type solar cell backboard according to claim 1, it is characterized in that: described adhesive layer (2) is the polyurethane bicomponent adhesive.

5. a kind of heterogeneous two-sided fluorine-containing type solar cell backboard according to claim 1, it is characterized in that: the thickness of described adhesive layer (2) is the 5-30 micron.

6. a kind of heterogeneous two-sided fluorine-containing type solar cell backboard according to claim 1, it is characterized in that: described thin layer (3) is pet film, and the thickness of described thin layer (3) is the 100-400 micron.

7. a kind of heterogeneous two-sided fluorine-containing type solar cell backboard according to claim 1, it is characterized in that: described priming coat (4) is the class adhesive for polyurethane, and the thickness of described priming coat (4) is the 5-30 micron.

8. a kind of heterogeneous two-sided fluorine-containing type solar cell backboard according to claim 1, it is characterized in that: the thickness of described coat (5) is the 10-40 micron.