CN101916789B - Backboard of solar battery with seven-layer structure - Google Patents
Backboard of solar battery with seven-layer structure Download PDFInfo
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- CN101916789B CN101916789B CN 201010220596 CN201010220596A CN101916789B CN 101916789 B CN101916789 B CN 101916789B CN 201010220596 CN201010220596 CN 201010220596 CN 201010220596 A CN201010220596 A CN 201010220596A CN 101916789 B CN101916789 B CN 101916789B
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Abstract
The invention relates to a backboard of a solar battery with a seven-layer structure, which comprises a first fluoroplastic weather-resistant layer, a first transition layer, a first bonding layer, a structure enhancing layer, a second bonding layer, a second transition layer and a second fluoroplastic weather-resistant layer. The first fluoroplastic weather-resistant layer is attached to the first transition layer; the first transition layer is bonded with the structure enhancing layer through the first bonding layer; the structure enhancing layer is bonded with the second transition layer through the second bonding layer; the second transition layer is attached to the second fluoroplastic weather-resistant layer; and more preferably, the first transition layer and the second transition layer are polymer layers containing crylic acid or esters thereof or alloy layers made from polymer containing crylic acid or esters thereof and fluoroplastic containing vinylidene fluoride groups. The invention has two transition layers perfectly compatible with the fluoroplastic, which greatly enhances the bonding strength of the fluoroplastic and the structure enhancing layer and improves the reliability of the backboard of the solar battery, being remarkably significant to the solar energy industry.
Description
Technical field
The present invention relates to technical field of solar batteries, particularly solar cell backboard technical field specifically is meant a kind of solar cell backboard of seven-layer structure.
Background technology
Nowadays, solar cell is by a large amount of uses, and the backboard of solar cell is one of its most important encapsulating material.The reliability of solar cell depends on the reliability of backboard to a great extent.
Relatively the backboard of solar cell commonly used all uses fluoroplastics as outermost weathering layer at present.The most common fluoroplastics that are used in the backboard are polyvinyl fluoride (PVF), and its topmost manufacturer is an E.I.Du Pont Company.The trade name of the commercial PVF film of E.I.Du Pont Company is the Tedlar film.Modal backboard has TPT and two kinds of structures of TPE, and wherein T just is meant the Tedlar film of E.I.Du Pont Company, i.e. PVF film.P refers to PETG (PET) film, and E refers to ethylene-vinyl acetate resin (EVA) film.Therefore, the TPT structure just is meant PVF film/PET film/PVF membrane structure, and the TPE structure refers to PVF film/PET film/eva film structure.Other backboards commonly used use other fluoroplastics as weathering layer, such as Kynoar (PVDF), ethylene-tetrafluoroethylene copolymer (ETFE), hexafluoropropylene (HFP)/tetrafluoroethylene (TFE)-vinylidene fluoride copolymers (THV), ethylene-chlorinated (ECTFE) etc.The bonding of fluoroplastics and PET all is to use the glue of band solvent in these structures, and commonly used have acrylate glue, polyurethane adhesive or an epoxy glue.So at present main backboard all is to be connected successively and the five-layer structure that forms by fluoroplastic layer, glue-line, pet layer, glue-line and fluoroplastic layer (or EVA layer).
Fluoroplastics have excellent weather resistance, because surface energy is very low, have not viscosity clearly simultaneously, and glue is not easy to sprawl on its surface and causes itself and other plastics to be not easy very much bonding.Even through to after the fluoroplastics surface treatment, handle as using corona, plasma or primary coat, glue increases in its surperficial spreadability, but adhesion strength is still not high.The cohesive force of fluoroplastics and PET usually 4-8 newton/centimetre, be difficult to surpass 10 newton/centimetre.Adhesion strength is low cause fluoroplastic layer easily produce or use in peel off from PET, thereby make backboard lose weatherability and can't protect solar panel.
Therefore, press for the adhesion strength that improves fluoroplastics and PET, this is extremely important to the reliability that improves solar cell backboard.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art; A kind of solar cell backboard of seven-layer structure is provided, and this solar cell backboard has seven-layer structure, compares with common solar cell backboard; Many two-layer and the extraordinary transition zones of fluoroplastics compatibility; Strengthened the adhesion strength of fluoroplastics and structure enhancement layer greatly, thereby improved the reliability of solar cell backboard, the solar energy industry has been had very important meaning.
To achieve these goals; The solar cell backboard of seven-layer structure of the present invention; Be characterized in; Comprise the top-down first fluoroplastics weathering layer, first transition zone, first tack coat, structure enhancement layer, second tack coat, second transition zone and the second fluoroplastics weathering layer, the said first fluoroplastics weathering layer said first transition zone of fitting, said first transition zone is through the said first tack coat said structure enhancement layer that bonds; Said structure enhancement layer is through said second tack coat said second transition zone that bonds, the said second transition zone said second fluoroplastics weathering layer of fitting.
Preferably, said first fluoroplastics weathering layer and the said second fluoroplastics weathering layer are the Fluoroine-containing plastic alloy layers that contains the vinylidene segment.
Preferably, the thickness range of said first fluoroplastics weathering layer and the said second fluoroplastics weathering layer is 1～40 μ m.
Preferably, said first transition zone and said second transition zone are to contain the polymeric layer of acrylic acid or its lipid or contain acrylic acid or the alloy-layer of the polymer of its lipid and the fluoroplastics formation that contains the vinylidene group.
Preferably, the thickness range of said first transition zone and said second transition zone is 1～60 μ m.
Preferably, said first tack coat and said second tack coat are the adhesion resin layers.
More preferably, said adhesion resin is the copolymer of ethene and polar resin.
Further, the copolymer of described ethene and polar resin comprise anhydride modified ethylene-vinyl acetate copolymer, anhydride modified LLDPE, the anhydride modified same methacrylic acid copolymer of high density polyethylene (HDPE), ethene and ethene with acrylic acid or its lipin polymer, ethene with along butadiene or along one or more of the copolymer of butadiene acid anhydride.
Preferably, the thickness range of said first tack coat and said second tack coat is 1～50 μ m.
Preferably, said structure enhancement layer is a polyester layer.
More preferably, said polyester layer is the PETG layer.
Preferably, the thickness range of said structure enhancement layer is 40～400 μ m.
Beneficial effect of the present invention is:
1, the present invention use acrylic acid or its lipid polymer or acrylic acid or its lipid polymer and contain alloy that the fluoroplastics of vinylidene form as the transition zone of fluoroplastics weathering layer to tack coat; With the fluoroplastics that contain the vinylidene segment extraordinary compatibility is arranged owing to contain the polymer of acrylic acid or its lipid; This almost can merge the transition zone of Fluoroine-containing plastic alloy layer (being weathering layer) that contains vinylidene and the polymer that contains acrylic acid or its lipid fully and becomes the integral body that can't separate; And the polymer surfaces that contains acrylic acid or its lipid has good caking property; This performance makes the transition zone can be good with other plastic bonding; Strengthened the adhesion strength of fluoroplastics and structure enhancement layer greatly, thereby improved the reliability of solar cell backboard, the solar energy industry has been had very important meaning.
2, the present invention is that the copolymer of ethene and polar resin substitutes as tack coat and uses glue (polyurethane adhesive, acrylate glue or epoxy glue) always through using adhesion resin also; The polymer of adhesion resin and acrylic acid or its lipid has extraordinary compatibility; Can't separate so also can combine together; And suitable adhesion resin can be bonded in the surface of structure enhancement layer such as pet layer with very high adhesion strength; Further strengthened the adhesion strength of fluoroplastics and structure enhancement layer, thereby improved the reliability of solar cell backboard, the solar energy industry has been had very important meaning.
Through above way, fluoroplastic layer finally can be bonded on structure enhancement layer such as the pet layer with very high intensity.More than each layer, can also add suitable pigment, age resister, inorganic filler on demand.
Because back board structure of the present invention has increased substantially the adhesion strength of fluoroplastics weathering layer and structure enhancement layer, improved the reliability of solar cell backboard, thereby the raising of solar components reliability has been had very important significance.
Description of drawings
Fig. 1 is the structural representation of a specific embodiment of the present invention.
Fig. 2 is the structural representation of another specific embodiment of the present invention.
Embodiment
In order more to be expressly understood technology contents of the present invention, the special following examples of lifting specify.Wherein identical parts adopt identical Reference numeral.
See also illustrated in figures 1 and 2; The solar cell backboard of seven-layer structure of the present invention comprises the top-down first fluoroplastics weathering layer 1, first transition zone 2, first tack coat 3, structure enhancement layer 4, second tack coat 5, second transition zone 6 and the second fluoroplastics weathering layer 7; Said first transition zone 2 of the said first fluoroplastics weathering layer, 1 applying; Said first transition zone 2 is through the said structure enhancement layer 4 of said first tack coat, 3 bondings; Said structure enhancement layer 4 passes through said second transition zone 6 of said second tack coat, 5 bondings, the said second fluoroplastics weathering layer 7 of said second transition zone, 6 applyings.
Said first fluoroplastics weathering layer 1 and the said second fluoroplastics weathering layer 7 can adopt the fluoroplastics of any appropriate.Preferably, the said first fluoroplastics weathering layer 1 is the Fluoroine-containing plastic alloy layers that contain the vinylidene segment with the said second fluoroplastics weathering layer 7.Can be to contain the fluoroplastics of vinylidene segment or contain the fluoroplastics of vinylidene segment and the mixture of the pigment of interpolation on demand, other plastics and auxiliary agent formation.Wherein, the fluoroplastics that contain vinylidene can be Kynoar (PVDF), hexafluoropropylene (HFP)/tetrafluoroethylene (TFE)-vinylidene fluoride copolymers (THV), vinylidene-fluoride copolymers, vinylidene-CTFE etc.Pigment can be white, black, blueness etc., like titanium dioxide, zinc oxide, alundum (Al, silicon dioxide, di-iron trioxide, barium sulfate, zinc sulphide, calcium carbonate, carbon black etc.Other plastics be meant can be compatible with the fluoroplastics that contain inclined to one side fluorine segment plastics, as contain the polymer (like polymetylmethacrylate) of acrylic acid or its ester class and contain fluoroplastics (like polyvinyl fluoride PVF) that the fluoroplastics of vinylidene segment can be compatible etc.Auxiliary agent refers to age resister commonly used in the plastics, anti ultraviolet agent, dispersant etc.Two-layer fluoroplastics weathering layer can use identical materials also can use material different.
The thickness of said first fluoroplastics weathering layer 1 and the said second fluoroplastics weathering layer 7 can be confirmed as required.Preferably, the thickness range of said first fluoroplastics weathering layer 1 and the said second fluoroplastics weathering layer 7 is 1～40 μ m.The thickness of said first fluoroplastics weathering layer 1 and the said second fluoroplastics weathering layer 7 can be identical, also can be different.
Said first transition zone 2 and said second transition zone 6 can adopt the material of any appropriate.Preferably, said first transition zone 2 is to contain the polymeric layer of acrylic acid or its lipid or contain acrylic acid or the alloy-layer of the polymer of its lipid and the fluoroplastics formation that contains the vinylidene group with said second transition zone 6.The polymer that contains acrylic acid or its lipid refers to contain the plastics of acrylic acid groups, like copolymer (ACR) of polymethyl methacrylate (PMMA), n butyl acrylate styrene (MBS), ethylene-methacrylic acid copolymer (EMA), methyl methacrylate and acrylic acid ester etc.Said first transition zone 2 can add or not add pigment, other plastics and auxiliary agent on demand with said second transition zone 6.Two-layer transition zone can use identical materials also can use material different.
The thickness of said first transition zone 2 and said second transition zone 6 can be confirmed as required.Preferably, the thickness range of said first transition zone 2 and said second transition zone 6 is 1～60 μ m.The thickness of said first transition zone 2 and said second transition zone 6 can be identical, also can be different.
Said first tack coat 3 can adopt any suitable material with said second tack coat 5.Preferably, said first tack coat 3 is adhesion resin layers with said second tack coat 5.Adhesion resin; It is the copolymer of ethene and polar resin; This copolymer at room temperature exists with the form of plastic pellet, this copolymer comprise anhydride modified ethylene-vinyl acetate copolymer, anhydride modified LLDPE, the anhydride modified same methacrylic acid copolymer of high density polyethylene (HDPE), ethene and ethene with acrylic acid or its lipin polymer, ethene with along butadiene or along the copolymer of butadiene acid anhydride.Two-layer tack coat can use identical materials also can use material different.
The thickness of said first tack coat 3 and said second tack coat 5 can be confirmed as required.Preferably, the thickness range of said first tack coat 3 and said second tack coat 5 is 1～50 μ m.The thickness of said first tack coat 3 and said second tack coat 5 can be identical, also can be different.
Said structure enhancement layer 4 can adopt any suitable material.Preferably, said structure enhancement layer 4 is a polyester layer.More preferably, said polyester layer is the PETG layer.Polyester layer can also be PETG (PET) layer, PTT (PTT), polybutylene terephthalate (PBT) (PBT) layer or PEN (PEN) layer.Can be biaxially oriented laminated film, monodirectional tension film or do not stretch.Surface of polyester can be carried out corona (Corona), plasma (Plasma), flame (Flame) or primary coat PROCESS FOR TREATMENT such as (Primer) on demand to increase surface energy.Can only adopt a kind of PROCESS FOR TREATMENT, also can successively adopt several kinds of PROCESS FOR TREATMENT to increase its surface energy.Said structure enhancement layer 4 can add or not add pigment, other plastics and auxiliary agent on demand.
The thickness of said structure enhancement layer 4 can be confirmed as required.Preferably, the thickness range of said structure enhancement layer is 40～400 μ m.
As shown in Figure 1, in a specific embodiment of the present invention, the first fluoroplastics weathering layer 1 is for being the white fluoro-containing plastic alloy of Main Ingredients and Appearance with PVDF, and its thickness is 20 μ m; First transition zone 2 is the mixture of PVDF and PMMA, and thickness is 1 μ m; First tack coat 3 is anhydride modified ethylene-vinyl acetate copolymer, and thickness is 1 μ m; Structure enhancement layer 4 is PETGs of biaxial tension, and its thickness is 400 μ m; Second tack coat 5 is anhydride modified ethylene-vinyl acetate copolymer, and thickness is 2 μ m; Second transition zone 6 is the mixture of PVDF and PMMA, and thickness is 15 μ m; The second fluoroplastics weathering layer 7 is the black fluoro-containing plastic alloy of Main Ingredients and Appearance for PVDF, and its thickness is 1 μ m.The first fluoroplastics weathering layer 1 and first transition zone 2, first transition zone 2 and first tack coat 3, the second fluoroplastics weathering layer 7 and second transition zone 6, second transition zone 6 and second tack coat 5 can't be peeled off; Peel strength between first tack coat 3 and PET be 22 newton/centimetre, the peel strength between second tack coat 5 and PET be 22 newton/centimetre.
As shown in Figure 2, in another specific embodiment of the present invention, the first fluoroplastics weathering layer 1 is for being the fluoro-containing plastic alloy of main component with PVDF, and its thickness is 25 μ m; First transition zone 2 is white PMMA, and its thickness is 60 μ m; First tack coat 3 is a vinyl-acrylate copolymer, and thickness is 50 μ m; Structure enhancement layer 4 is PETGs of biaxial tension, and its thickness is 40 μ m; Second tack coat 5 is a vinyl-acrylate copolymer, and thickness is 50 μ m; Second transition zone 6 is white PMMA, and its thickness is 60 μ m; The second fluoroplastics weathering layer 7 is for being the fluoro-containing plastic alloy of main component with PVDF, and its thickness is 25 μ m.The first fluoroplastics weathering layer 1 and first transition zone 2, first transition zone 2 and first tack coat 3, the second fluoroplastics weathering layer 7 and second transition zone 6, second transition zone 6 and second tack coat 5 can't be peeled off; Peel strength between first tack coat 3 and PET be 28 newton/centimetre, the peel strength between second tack coat 5 and PET be 28 newton/centimetre.
The invention provides a kind of solar cell backboard of seven-layer structure, in the backboard of seven-layer structure, used two-layer and the extraordinary transition zone of fluoroplastics compatibility.Because the existence of transition zone has overcome the not viscosity on fluoroplastics surfaces; The bonding of fluoroplastics and structure enhancement layer (PET) has become the bonding of transition zone and structure enhancement layer; Thereby the adhesion strength of fluoroplastics and structure enhancement layer is improved greatly; Also use adhesion resin to substitute solvent-laden glue commonly used, the adhesion strength of each interlayer of the present invention is further improved, the reliability that improves solar cell backboard is had very important significance.
To sum up; The solar cell backboard of seven-layer structure of the present invention has seven-layer structure; Compare with common solar cell backboard, many two-layer and the extraordinary transition zones of fluoroplastics compatibility have strengthened the adhesion strength of fluoroplastics and structure enhancement layer greatly; Thereby improved the reliability of solar cell backboard, the solar energy industry has been had very important meaning.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (11)
1. the solar cell backboard of a seven-layer structure; It is characterized in that; Comprise the top-down first fluoroplastics weathering layer, first transition zone, first tack coat, structure enhancement layer, second tack coat, second transition zone and the second fluoroplastics weathering layer; The said first fluoroplastics weathering layer said first transition zone of fitting; Said first transition zone is through the said first tack coat said structure enhancement layer that bonds; Said structure enhancement layer is through said second tack coat said second transition zone that bonds, and the said second transition zone said second fluoroplastics weathering layer of fitting, said first transition zone and said second transition zone are to contain the polymeric layer of acrylic acid or its lipid or contain acrylic acid or alloy-layer that the polymer of its lipid and the fluoroplastics that contain the vinylidene group form.
2. the solar cell backboard of seven-layer structure according to claim 1 is characterized in that, said first fluoroplastics weathering layer and the said second fluoroplastics weathering layer are the Fluoroine-containing plastic alloy layers that contains the vinylidene segment.
3. the solar cell backboard of seven-layer structure according to claim 1 is characterized in that, the thickness range of said first fluoroplastics weathering layer and the said second fluoroplastics weathering layer is 1～40 μ m.
4. the solar cell backboard of seven-layer structure according to claim 1 is characterized in that, the thickness range of said first transition zone and said second transition zone is 1～60 μ m.
5. the solar cell backboard of seven-layer structure according to claim 1 is characterized in that, said first tack coat and said second tack coat are the adhesion resin layers.
6. the solar cell backboard of seven-layer structure according to claim 5 is characterized in that, said adhesion resin is the copolymer of ethene and polar resin.
7. the solar cell backboard of seven-layer structure according to claim 6; It is characterized in that, the copolymer of described ethene and polar resin comprise anhydride modified ethylene-vinyl acetate copolymer, anhydride modified LLDPE, the anhydride modified same methacrylic acid copolymer of high density polyethylene (HDPE), ethene and ethene with acrylic acid or its lipin polymer, ethene with along butadiene or along one or more of the copolymer of butadiene acid anhydride.
8. the solar cell backboard of seven-layer structure according to claim 1 is characterized in that, the thickness range of said first tack coat and said second tack coat is 1～50 μ m.
9. the solar cell backboard of seven-layer structure according to claim 1 is characterized in that, said structure enhancement layer is a polyester layer.
10. the solar cell backboard of seven-layer structure according to claim 9 is characterized in that, said polyester layer is the PETG layer.
11. the solar cell backboard of seven-layer structure according to claim 1 is characterized in that, the thickness range of said structure enhancement layer is 40～400 μ m.
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| CN102157591B (en) * | 2011-01-11 | 2012-09-19 | 山东东岳高分子材料有限公司 | Back panel of solar cell and preparation method thereof |
| CN102376805B (en) * | 2011-10-18 | 2014-06-04 | 江苏科技大学 | Solar cell backplane and manufacturing method thereof |
| CN102354713A (en) * | 2011-11-09 | 2012-02-15 | 李民 | Six-layer solar cell back plate |
| CN102368511B (en) * | 2011-11-15 | 2013-07-10 | 乐凯胶片股份有限公司 | Preparation method of solar cell back film |
| CN102637763B (en) * | 2012-05-08 | 2014-10-29 | 江苏科技大学 | Solar cell backboard with excellent weathering resistance and preparation method thereof |
| CN102938426B (en) * | 2012-11-01 | 2016-08-31 | 常州大学 | A kind of photovoltaic back veneer material and preparation method thereof |
| CN102922842B (en) * | 2012-11-26 | 2015-04-22 | 山东东岳高分子材料有限公司 | Solar cell back panel film and preparation method thereof |
| CN102969383B (en) * | 2012-12-07 | 2015-12-02 | 上海海优威新材料股份有限公司 | The solar cell backboard of three-decker |
| CN103144390B (en) * | 2013-03-07 | 2015-08-19 | 云南云天化股份有限公司 | A kind of solar cell backboard |
| CN105720125B (en) * | 2015-11-16 | 2018-01-12 | 中天光伏材料有限公司 | A kind of functional multi layer composite photo voltaic backboard |
| CN106159015A (en) * | 2016-07-25 | 2016-11-23 | 无锡中洁能源技术有限公司 | A kind of solar cell backboard with high flame retardant |
| CN114447133B (en) * | 2021-12-14 | 2024-06-21 | 乐凯胶片股份有限公司 | Photovoltaic backboard, method for manufacturing photovoltaic backboard and photovoltaic module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040202866A1 (en) * | 2003-04-11 | 2004-10-14 | Kernander Carl P. | Bright white protective laminates |
| CN101290950B (en) * | 2008-05-23 | 2011-02-02 | 浙江工业大学 | A kind of back film of solar battery panel and production process thereof |
| CN101431108A (en) * | 2008-12-09 | 2009-05-13 | 上海海优威电子技术有限公司 | Novel solar battery backboard |
| CN101582458B (en) * | 2009-06-26 | 2011-01-26 | 上海海优威电子技术有限公司 | Solar battery backplane |
| CN101582459B (en) * | 2009-06-26 | 2011-04-13 | 上海海优威电子技术有限公司 | Solar battery backboard taking modified polyvinylidene fluoride alloy layer as weathering protective layer |
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Address after: 201203, Shanghai, Pudong New Area, 3000 East long avenue, 1 hi tech Development Zone,, Hong Kong building, room No. Patentee after: SHANGHAI HIUV NEW MATERIALS CO., LTD. Address before: 201203, Shanghai, Pudong Zhang Jiang long East Road 3000, Zhang Jiang hi tech Development Zone, No. 1, building 909B, block A Patentee before: Shanghai HIUV Electronic Technology Co., Ltd. |