CN202434550U - Backboard of MWT (metal wrap through) solar cell - Google Patents
Backboard of MWT (metal wrap through) solar cell Download PDFInfo
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- CN202434550U CN202434550U CN 201220052301 CN201220052301U CN202434550U CN 202434550 U CN202434550 U CN 202434550U CN 201220052301 CN201220052301 CN 201220052301 CN 201220052301 U CN201220052301 U CN 201220052301U CN 202434550 U CN202434550 U CN 202434550U
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- layer
- metal foil
- mwt
- foil layer
- substrate
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
A backboard of an MWT (metal wrap through) solar cell belongs to the technical field of solar photovoltaic cells and comprises a substrate, a first bonding layer, a second bonding layer, a weather resistant layer, an insulating layer and a metal foil layer. The first bonding layer is located between the substrate and the metal foil layer and surface of the metal foil layer facing the substrate is integrally combined with the substrate by the aid of the first bonding layer. The second bonding layer is located between the substrate and the weather resistant layer and surface of the weather resistant layer facing the substrate is integrally combined with the substrate by the aid of the second bonding layer. The insulating layer is combined with the surface of the metal foil layer opposite to the first bonding layer. Etching lines and electrodes are formed on the metal foil layer. The metal foil layer is divided into multiple metal foil layer units by the etching lines. The electrodes are formed in the metal foil layer units and the insulating layer is exposed. The backboard of the MWT solar cell has the advantages that weather resistance, size stability, insulativity and effective vapor sealing capability are enhanced, partial discharge power is improved, shading rate of surface grid lines is lowered, and assembly efficiency is improved.
Description
Technical field
The utility model belongs to the solar-energy photo-voltaic cell technical field, is 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
The task of
the utility model 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.
The task of
the utility model 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 one of the utility model concrete embodiment, described substrate layer is a PETG.
in another concrete embodiment of the utility model, said weathering layer is polyvinylidene fluoride or polyvinyl fluoride.
in another concrete embodiment of the utility model, described first tack coat and second tack coat are polyurethane adhesive.
in another concrete embodiment of the utility model, described metal foil layer is a Copper Foil.
also have among the concrete embodiment the utility model, and described Copper Foil is an electrolytic copper foil.
the utility model more and among concrete embodiment, described insulating barrier is a printing ink.
the utility model so that concrete embodiment in, described printing ink is epoxy resin printing ink.
The technique effect of the technical scheme that
the utility model provides 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 example structure figure of the utility model.
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 the application examples sketch map of the utility model.
Embodiment
can be expressly understood the technical spirit and the beneficial effect of the utility model 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 utility model scheme, any according to the utility model design done only for pro forma but not substantial equivalent transformation all should be regarded as the technical scheme category of the utility model.
Embodiment 1:
see also Fig. 1; Provided the cross section of the MWT used for solar batteries backboard of the utility model; Comprise substrate layer 1, first, second tack coat 2,3, weathering layer 4, insulating barrier 5 and the metal foil layer of setting up 6 through corona treatment; 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 through the insulating barrier 5 of the 4th tack coat 71 (EVA glued membrane) with the backboard that constitutes the utility model, and is electrically connected with the electrode 62 of the metal foil layer 6 of the utility model through conducting resinl 72, exports electric energy with realization.Undoubtedly, the size of the backboard of the utility model is identical with battery sheet 7.
In sum, the MWT used for solar batteries backboard that the utility model provides 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
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220052301 CN202434550U (en) | 2012-02-17 | 2012-02-17 | Backboard of MWT (metal wrap through) solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220052301 CN202434550U (en) | 2012-02-17 | 2012-02-17 | Backboard of MWT (metal wrap through) solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202434550U true CN202434550U (en) | 2012-09-12 |
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ID=46783971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220052301 Expired - Fee Related CN202434550U (en) | 2012-02-17 | 2012-02-17 | Backboard of MWT (metal wrap through) solar cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202434550U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332517A (en) * | 2014-11-17 | 2015-02-04 | 苏州尚善新材料科技有限公司 | Back contact type solar cell electric conduction backboard |
-
2012
- 2012-02-17 CN CN 201220052301 patent/CN202434550U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332517A (en) * | 2014-11-17 | 2015-02-04 | 苏州尚善新材料科技有限公司 | Back contact type solar cell electric conduction backboard |
| CN107658354A (en) * | 2014-11-17 | 2018-02-02 | 帝斯曼尚善太阳能科技（苏州）有限公司 | A kind of back contact solar battery conductive backings |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20200217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |