CN102544161A - Back plate for metal wrap through (MWT) solar battery - Google Patents

Back plate for metal wrap through (MWT) solar battery Download PDF

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Publication number
CN102544161A
CN102544161A CN2012100364615A CN201210036461A CN102544161A CN 102544161 A CN102544161 A CN 102544161A CN 2012100364615 A CN2012100364615 A CN 2012100364615A CN 201210036461 A CN201210036461 A CN 201210036461A CN 102544161 A CN102544161 A CN 102544161A
Authority
CN
China
Prior art keywords
layer
metal foil
mwt
foil layer
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012100364615A
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Chinese (zh)
Inventor
邵名巍
左黎明
杨小旭
居荣生
应柯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHANGSHU TOP SOLAR MATERIAL Co Ltd
Original Assignee
CHANGSHU TOP SOLAR MATERIAL Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHANGSHU TOP SOLAR MATERIAL Co Ltd filed Critical CHANGSHU TOP SOLAR MATERIAL Co Ltd
Priority to CN2012100364615A priority Critical patent/CN102544161A/en
Publication of CN102544161A publication Critical patent/CN102544161A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The invention discloses a back plate for a metal wrap through (MWT) solar battery and belongs to the technical field of solar photovoltaic batteries. The back plate comprises a base material layer, a first adhesion layer, a second adhesion layer, a weather-resistant layer and an insulating layer. The back plate is characterized by also comprising a metal foil layer, wherein the first adhesion layer is positioned between the base material layer and the metal foil layer and used for bonding the surface of one side, facing the base material layer, of the metal foil layer and the base material layer into a whole; the second adhesion layer is positioned between the base material layer and the weather-resistant layer and used for bonding the surface of one side, facing the base material layer, of the weather-resistant layer and the base material layer into a whole; the insulating layer is bonded on the surface of one side, opposite to the first adhesion layer, of the metal foil layer; an etching line and electrodes are formed on the metal foil layer; the metal foil layer is divided into a plurality of metal foil layer units by the etching line; and the electrodes are respectively formed in the metal foil layer units and exposed out of the insulating layer. The back plate for the MWT solar battery has the advantages that: the weather resistance, size stability, insulativity and sealability in effective blocking of water vapor are improved; the partial discharge power can be improved; the light shading rate of a surface gate line is reduced; and component efficiency is improved.

Description

MWT used for solar batteries backboard
Technical field
The invention belongs to the solar-energy photo-voltaic cell technical field, be specifically related to a kind of MWT used for solar batteries backboard
Background technology
above mentioned MWT is English Metallisation Wrap Through or Metal Wrap Through (being called for short MWT); Chinese contains and means metal wound form (also claiming the metal piercing formula), and the reading of specification that can be through centering state invention public announcement of a patent application CN10208486A (a kind of preparation method of MWT solar-energy photo-voltaic cell) and CN102203959A (solar cell and manufacturing approach thereof) and CN102132421A (solar cell and manufacturing approach thereof) to this is further understood.
The overall structure of solar-energy photo-voltaic cell is that industry is known, comprises; Framework (adopting the aluminium frame usually), be installed on solar energy photovoltaic glass on the framework, be positioned at battery sheet (also claiming silicon chip or silicon plate), hot melt adhesive layer (EVA layer), terminal box and the backboard (the backboard custom is claimed insulating back panel) of solar energy photovoltaic glass below.
are deficient day by day in view of non-renewable natural resources such as oil, coal, natural gas and ocean ice; Again in view of human economy consciousness and the remarkable enhancing of protecting consciousness to natural resources; Utilization inexhaustible and resource that have the feature of environmental protection and cheapness property such as wind energy and solar energy is paid attention to day by day, and the status of solar energy in the sustainable use energy strategy of the mankind shows day by day.
solar cell is photovoltaic module (being called for short the PV assembly); It is one of core component in the solar photovoltaic generation system; It is to be laminated between ultra-thin transparent and high-intensity glass and the sealing bottom and to constitute by arranging one group of good crystal silicon cell in advance, seals bottom and is backboard.Because backboard plays the weather resistant protection of sealing to crystal silicon cell, so its quality is directly connected to the useful life of solar cell.More particularly; Be generally the useful life of PV assembly >=30 years; Therefore solar cell backboard only possess that weatherability, resistance to ag(e)ing, insulating properties, the contamination resistance of standing out from one's fellows are strong, steam transmitance (sealing) is low with partial discharge ability>1000V with first-class characteristics, could adapt with the useful life of PV assembly.
prior art; Particularly in disclosed patent documentation, is no lack of the technical information that is seen in the used for solar batteries backboard; Like Chinese patent CN101582458A, CN101582459A, CN201387885Y, CN201387887Y, CN101615636A, CN101431108A, CN101992571A, CN101992572A, CN101979247A and CN101964371A, or the like.And for example U.S. Pat 3133854, US513989 and US6632518, or the like.
respectively have achievement aspect weatherability, resistance to ag(e)ing, insulating properties and the water vapor barrier property though be not limited to the disclosed used for solar batteries backboard of above-mentioned patent improving; Be not easy to through being electrically connected the logical fraud of exporting electric energy with the battery sheet but exist, and objectively do not provide yet how to be able to the battery sheet between realize the teachings that is electrically connected.
Logical fraud in view of above-mentioned prior art exists is necessary to improve, and to this, the applicant has done long-term and useful exploration and experiment repeatedly, and the technical scheme that will introduce below produces under this background
Summary of the invention
task of the present invention is to provide a kind of both helped significantly to improve weatherability, dimensional stability, insulating properties and sealing, helps improving partial discharge power again and can be of value to and realize being electrically connected with the battery sheet and use the MWT used for solar batteries backboard of exporting electric energy.
task of the present invention is accomplished like this; A kind of MWT used for solar batteries backboard; Comprise substrate layer, first, second tack coat, weathering layer and insulating barrier; Be characterised in that also to include a metal foil layer that described first tack coat is combined as a whole a side surface and the substrate layer of metal foil layer towards substrate layer between said substrate layer and described metal foil layer; Described second tack coat is between substrate layer and said weathering layer; A side surface and the substrate layer of weathering layer towards substrate layer is combined as a whole, and described insulating barrier is combined in the surface of metal foil layer back to a side of said first tack coat, on described metal foil layer, is formed with etching line and electrode; By said etching line said metal foil layer is divided into a plurality of metal foil layers independent of each other unit, said electrode is formed in each metal foil layer unit and exposes insulating barrier.
in a concrete embodiment of the present invention, described substrate layer is a PETG.
in another concrete embodiment of the present invention, said weathering layer is polyvinylidene fluoride or polyvinyl fluoride.
in another concrete embodiment of the present invention, described first tack coat and second tack coat are polyurethane adhesive.
in another concrete embodiment of the present invention, described metal foil layer is a Copper Foil.
also have among the concrete embodiment of the present invention, and described Copper Foil is an electrolytic copper foil.
are more of the present invention and among concrete embodiment, described insulating barrier is a printing ink.
in of the present invention and then concrete embodiment, described printing ink is epoxy resin printing ink.
The technique effect of technical scheme provided by the invention is: owing to set up metal foil layer, therefore make the hierarchical structure that constitutes backboard more reasonable and can improve weatherability, dimensional stability, insulating properties significantly and effectively intercept the sealing of steam; Owing on metal foil layer, be formed with the electrode that exposes insulating barrier; Therefore can realize being electrically connected exporting electric energy through electrode and battery sheet, can improve partial discharge power, this backboard be installed on the MWT battery component; Can the main grid line be transferred to the back side from traditional front; The front only keeps thin metal grid lines, therefore can reduce the shading rate of surperficial grid line, helps improving component efficiency.
Description of drawings
Fig. 1 is the embodiments of the invention structure chart.
Fig. 2 is etching line and the sketch map of electrode that is formed on the metal foil layer shown in Figure 1.
Fig. 3 is an application examples sketch map of the present invention.
Embodiment
can be expressly understood technical spirit of the present invention and beneficial effect more for the auditor that the makes Patent Office especially public; The applicant general elaborates with the mode of embodiment below; But the description to embodiment all is not the restriction to the present invention program, any according to the present invention design done only for pro forma but not substantial equivalent transformation all should be regarded as technical scheme category of the present invention.
Embodiment 1:
see also Fig. 1; Provided the cross section of MWT used for solar batteries backboard of the present invention; Comprise substrate layer 1, first, second tack coat 2,3, the weathering layer 4 through corona treatment, insulating barrier 5 and the metal foil layer of setting up 6, first, second tack coat 2,3 is polyurethane adhesive and promptly is the polyurethane adhesive layer, wherein; First tack coat 2 is that material is between the substrate layer 1 and metal foil layer 6 of PETG what filled the post of by PETG; By it a side surface and the substrate layer 1 of metal foil layer 6 towards substrate layer 1 is combined as a whole, in the present embodiment, metal foil layer 6 is an electrolytic copper foil.Second tack coat 3 is combined as a whole a side surface and the substrate layer 1 of weathering layer 4 towards substrate layer 1 by this second tack coat 3 between substrate layer 1 and weathering layer 4, and in the present embodiment, weathering layer 4 is polyvinylidene fluoride (PVDF).Insulating barrier 5 is combined in the side surface of metal foil layer 6 back to aforementioned first tack coat 2.
see also Fig. 2 and continue to combine Fig. 1; On metal foil layer 6, be formed with etching line 61 and electrode 62; What metal foil layer 6 is divided into (also can claim to be separated into) a plurality of disconnections each other by etching line 61 is metal foil layer independent of each other unit, and electrode 62 is positioned at each metal foil layer unit and exposes insulating barrier 5.In the present embodiment, insulating barrier 5 is an epoxy resin printing ink.
in the present embodiment; The process of etching line 61 and electrode 62 is: adopt etch process on metal foil layer 6, to etch circuit; Form etching line 61 by circuit; Adopt silk screen printing with the surface of epoxy resin ink printing again, form insulating barrier 5, and form electrode 62 to metal foil layer 6.
Embodiment 2:
Instead polyvinyl fluoride (PVF) is only used weathering layer 4 in , and all the other are all with the description to embodiment 1.
Application examples:
see also Fig. 3; Battery sheet 7 and ultra-clear glasses 8 have been shown in Fig. 3; Ultra-clear glasses 8 combines with a side of battery sheet 7 through the 3rd tack coat 81 (EVA glued membrane); And the opposite side of battery sheet 7 combines with the insulating barrier 5 that constitutes backboard of the present invention through the 4th tack coat 71 (EVA glued membrane), and is electrically connected with the electrode 62 of metal foil layer 6 of the present invention through conducting resinl 72, exports electric energy with realization.Undoubtedly, the size of backboard of the present invention is identical with battery sheet 7.
In sum, MWT used for solar batteries backboard provided by the invention can effectively prevent corrosivity gas-liquid corrosion such as ultraviolet ray and steam, plays insulating protection; Can the electric energy output of battery sheet 7 be improved component efficiency again

Claims (8)

1. a kind of MWT used for solar batteries backboard; Comprise substrate layer (1), first, second tack coat (2,3), weathering layer (4) and insulating barrier (5); It is characterized in that also including a metal foil layer (6); Described first tack coat (2) is positioned between said substrate layer (1) and the described metal foil layer (6); A side surface and the substrate layer (1) of metal foil layer (6) towards substrate layer (1) is combined as a whole; Described second tack coat (3) is positioned between substrate layer (1) and the said weathering layer (4); A side surface and the substrate layer (1) of weathering layer (4) towards substrate layer (1) is combined as a whole, and described insulating barrier (5) is combined in the surface of metal foil layer (6) back to a side of said first tack coat (2), on described metal foil layer (6), is formed with etching line (61) and electrode (62); By said etching line (61) said metal foil layer (6) is divided into a plurality of metal foil layers independent of each other unit, said electrode (62) is formed in each metal foil layer unit and exposes insulating barrier (5).
2. MWT used for solar batteries backboard according to claim 1 is characterized in that described substrate layer (1) is a PETG.
3. MWT used for solar batteries backboard according to claim 1 is characterized in that said weathering layer (4) is polyvinylidene fluoride or polyvinyl fluoride.
4. MWT used for solar batteries backboard according to claim 1 is characterized in that described first tack coat (2) and second tack coat (3) are polyurethane adhesive.
5. MWT used for solar batteries backboard according to claim 1 is characterized in that described metal foil layer (6) is a Copper Foil.
6. MWT used for solar batteries backboard according to claim 5 is characterized in that described Copper Foil is an electrolytic copper foil.
7. MWT used for solar batteries backboard according to claim 1 is characterized in that described insulating barrier (5) is a printing ink.
8. MWT used for solar batteries backboard according to claim 7 is characterized in that described printing ink is epoxy resin printing ink
CN2012100364615A 2012-02-17 2012-02-17 Back plate for metal wrap through (MWT) solar battery Pending CN102544161A (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103522658A (en) * 2013-09-18 2014-01-22 芜湖群跃电子科技有限公司 Backboard for metal perforation type solar battery and preparation method of backboard
CN103545392A (en) * 2012-07-17 2014-01-29 昆山雅森电子材料科技有限公司 Solar back sheet for back-contacted solar cells
CN109545907A (en) * 2018-12-26 2019-03-29 江苏日托光伏科技股份有限公司 A kind of integrated backboard complex method of MWT
WO2019205494A1 (en) * 2018-04-27 2019-10-31 北京铂阳顶荣光伏科技有限公司 Conductive electrode membrane layer and photovoltaic element

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101272903A (en) * 2005-07-22 2008-09-24 大金工业株式会社 Back sheet of solar cell
CN201387887Y (en) * 2009-04-22 2010-01-20 常熟市冠日新材料有限公司 Insulated backplane for solar photovoltaic components
WO2011000629A2 (en) * 2009-06-29 2011-01-06 Robert Bosch Gmbh Method for producing a foil-like electrical connector for solar cells, connecting element produced according to said method, and method for electrically connecting at least two solar cells to form a solar module
CN101992572A (en) * 2010-09-02 2011-03-30 常熟市冠日新材料有限公司 Insulating back plate for solar photovoltaic component

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101272903A (en) * 2005-07-22 2008-09-24 大金工业株式会社 Back sheet of solar cell
CN201387887Y (en) * 2009-04-22 2010-01-20 常熟市冠日新材料有限公司 Insulated backplane for solar photovoltaic components
WO2011000629A2 (en) * 2009-06-29 2011-01-06 Robert Bosch Gmbh Method for producing a foil-like electrical connector for solar cells, connecting element produced according to said method, and method for electrically connecting at least two solar cells to form a solar module
CN101992572A (en) * 2010-09-02 2011-03-30 常熟市冠日新材料有限公司 Insulating back plate for solar photovoltaic component

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103545392A (en) * 2012-07-17 2014-01-29 昆山雅森电子材料科技有限公司 Solar back sheet for back-contacted solar cells
CN103522658A (en) * 2013-09-18 2014-01-22 芜湖群跃电子科技有限公司 Backboard for metal perforation type solar battery and preparation method of backboard
CN103522658B (en) * 2013-09-18 2017-02-15 东莞市安派电子有限公司 Backboard for metal perforation type solar battery and preparation method of backboard
WO2019205494A1 (en) * 2018-04-27 2019-10-31 北京铂阳顶荣光伏科技有限公司 Conductive electrode membrane layer and photovoltaic element
CN110416341A (en) * 2018-04-27 2019-11-05 北京铂阳顶荣光伏科技有限公司 Conductive electrode film layer and photovoltaic element
CN109545907A (en) * 2018-12-26 2019-03-29 江苏日托光伏科技股份有限公司 A kind of integrated backboard complex method of MWT

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Application publication date: 20120704

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