EP3539160A1 - Einkapselungsfolie für ein photovoltaikmodul in schindelbauweise - Google Patents
Einkapselungsfolie für ein photovoltaikmodul in schindelbauweiseInfo
- Publication number
- EP3539160A1 EP3539160A1 EP17793663.0A EP17793663A EP3539160A1 EP 3539160 A1 EP3539160 A1 EP 3539160A1 EP 17793663 A EP17793663 A EP 17793663A EP 3539160 A1 EP3539160 A1 EP 3539160A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- solar cells
- encapsulation film
- film
- shingled
- photovoltaic module
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
- H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
- H10F19/90—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers
-
- 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
Definitions
- the present invention relates to a structured encapsulation film for a shingle-type photovoltaic module, to photovoltaic modules comprising this structured encapsulation film, to processes for producing these modules, and to the use of structured encapsulation films in photovoltaic modules.
- solar cells are electrically connected in series because the resulting cell strings provide a higher modulus voltage, and these strings are laminated between two encapsulants and two cladding layers to photovoltaic modules. If the solar cells are contacted via a shingle connection to cell strings, it is possible to produce photovoltaic modules with particularly small inactive module surfaces and thus high efficiencies.
- a generally pasty mass, in particular electrically conductive adhesive must be cured in a precisely dimensioned joint between two partially overlapping solar cells.
- a solder joint must be made in this joint. be made, in particular on the basis of solder pastes or solder deposits.
- the supernatant of adjacent cells must be kept as small as possible in order to cover little cell surface.
- DE 4030713 AI relates to a photovoltaic solar generator whose solar cells have contact terminals on the longitudinal edges and are combined in overlapping form to form a shingle string, wherein a plurality of shingle strings are preferably embedded between a carrier and a cover in hot melt adhesive films.
- DE 3942205 A1 describes methods for producing a photovoltaic solar generator whose solar cells have contact elements extending over the cell width and are combined in shingled form into shingle strings, wherein the shingle strings are embedded between a carrier and a cover in hot melt adhesive films.
- the method is characterized by the following method steps: a) a paste-type contacting agent is applied to the contact elements of the solar cells, which causes an electrically conductive connection of two superposed contact elements of two adjacent solar cells in a low-temperature vacuum process, b) the solar cells are on a support c) the shingle strings are electrically conductively connected to one another in their edge regions and equipped with electrical connections; d) the shingle strings are provided with a second hot-melt adhesive film and a cover covered, and e) in a temperature-vacuum process, the contact elements of adjacent solar cells are electrically connected to each other and almost immediately thereafter the carrier He, the hot melt adhesive films, the solar cells and the cover to a solar cell generator mechanically bonded together.
- US 2015/0349174 AI relates to a highly efficient configuration for a solar Cell module containing solar cells which are arranged schindeiförmig to form supercells. These can be arranged so that the area of the solar module is used efficiently, the series resistance is reduced and the module efficiency is increased.
- DE 3708548 A1 relates to a solar cell module, wherein the solar cell rows consisting of a plurality of solar cells are arranged overlapping in such a way that the butt joints of adjacent solar cell rows are offset from one another, whereby a parallel and serial interconnection within the solar cell module is made possible.
- the shingled solar cell modules of the prior art still have some disadvantages.
- the cells had to be arranged in a template, firmly joined and then deposited as a long string on the encapsulation foil.
- the rearrangement of a finished string is complex and can lead to fractures, especially if the strings are also aligned with each other or a displacement of the cells is sought across the string direction.
- Another object of the present invention was to provide a simpler method of manufacturing photovoltaic modules with shingled solar cells, which allows mounting directly on the module foil, whereby the use of an additional stringer is not necessary. Furthermore, the string / lamination process should be feasible integrally (in a common process). In addition, a sub-task of the present invention was to allow a precise dosage of the connecting material and thus a minimization of the hidden cell surfaces. Furthermore, it was an object of the present invention to provide photovoltaic modules which have little or no inactive gap of adjacent strings. To avoid this gap, in particular for an offset shingles, it is necessary, the solar cells of adjacent cell strings also across the
- the encapsulation film for a shingle-type photovoltaic module according to independent claim 1 which consists of a thermoplastic material, wherein the encapsulation film has a structuring on a surface which allows positioning of solar cells with a defined overlap.
- the independent claim 7 relates to methods for producing a photovoltaic module having at least two shingled solar cells, in which a) a front-side encapsulation film is provided with a structuring, wherein the structuring of the inclusion of shingled solar cells is used, b) the front-side encapsulation film with the non-structured C) the solar cells are provided in regions with a bonding material, d) the solar cells are positioned in the structures of the front encapsulation film, e) a back encapsulation film and a cover on the side remote from the front encapsulation film surface of the solar cells and f) a composite of front cover, front encapsulant, solar cells, backside encapsulant and back cover is made by thermal treatment.
- independent claim 12 relates to a shingle-type photovoltaic module having a front-side structured encapsulation foil, at least two positives in the structure of the front encapsulation foil. neten and shingled with a compound material shingled solar cells, a back-side encapsulation film and a front-side transparent cover, wherein the shingled solar cells have an overlap of 10 to 500 ⁇ .
- the independent claim 13 relates to a photovoltaic module producible according to one of claims 7 to 11.
- Independent claim 14 relates to the use of an encapsulating film according to any one of claims 1 to 6 in a shingle-type photovoltaic module.
- the encapsulation film according to the present invention preferably has the structuring on the side which lies in the finished photovoltaic module on the side facing away from the cover plate and predetermines the position of the cell to be shingled.
- the encapsulation film has a structuring which is formed by a structural element whose cross section is selected from the group consisting of sawtooth, rectangle, trapezoid, semicircle, both raised and lowered in the film surface and that element is executed punctiform or linear along an extrusion axis and combinations thereof.
- the element is linear along a
- Extrusion axis is executed.
- an adhesive is often used.
- line-shaped structural elements along an extrusion axis it is possible to prevent a liquid-viscous adhesive from emerging from the gap between two solar cells before curing.
- the encapsulating film is designed such that the overlap width of the solar cells in the range of 10 to 500 ⁇ , preferably in the range of 30 to 350 ⁇ and more preferably in the range of 50 to 200 ⁇ .
- a further preferred embodiment of the present invention relates to an encapsulation film which is designed such that the overlap height of the solar cells in the range of 0.01 to 0.1 mm, preferably in the range of 0.02 to 0.08 mm, and particularly preferably in the range of 0.03 to 0.06 mm.
- the encapsulating film is made of a material selected from the group consisting of ethylene-vinyl acetate, polyolefins, silicones, polyvinyl butyral, ionomers and mixtures thereof.
- a further preferred embodiment of the present invention provides that the material for the encapsulating film is crosslinkable, preferably the thermoplastic material is crosslinked to form an elastomer.
- the film surface of the encapsulation film has a roughness of 10 to 100 ⁇ m. This roughness aids in the lamination process by facilitating evacuation.
- the surface structure of the encapsulating film may be formed by known thermoplastic molding processes, for example embossing over heated dies / rolls or by extrusion.
- the structured encapsulating film according to the present invention is preferably used in shingle-type photovoltaic modules.
- the method according to the invention for producing a photovoltaic module having at least two shingled solar cells comprises the following steps: a) structuring of a front-side encapsulation film, wherein the structuring serves to receive shingled solar cells, b) placing the front-side encapsulation film with the non-structured surface on a front-side cover pane, c Providing the solar cells with a bonding material, d) positioning the solar cells in the structures of the front-side encapsulating film, e) applying a back-side encapsulation film and a cover on the surface of the solar cells facing away from the front-side encapsulation film, and
- the method according to the invention comprises a further step g).
- This provides for the creation of a pre-bond between the bonding material and the solar cells by heating.
- Step g) is carried out between steps d) and e).
- step g) is not carried out, it is furthermore preferred for steps a) to f) to be carried out in the stated sequence.
- the structuring of the front-side encapsulation film takes place by embossing by means of a tempered stamp or by casting into a negative mold and subsequent curing.
- the encapsulating film is structured such that
- It has a structuring which is formed by a structural element whose cross section is selected from the group consisting of sawtooth, rectangle, trapezoid, semicircle, both raised and sunk in the film surface and that the element is executed punctiform or linear along an extrusion axis and combinations thereof; and or
- the overlap width of the solar cells to be used is in the range from 10 to 500 ⁇ m, preferably in the range from 30 to 350 ⁇ m, and particularly preferably in the range from 50 to 200 ⁇ m; and or
- the overlap height of the solar cells to be used is in the range from 0.01 to 0.1 mm, preferably in the range from 0.02 to 0.08 mm and particularly preferably in the range from 0.03 to 0.06 mm.
- the bonding material is a solder paste or a electrically conductive polymer, in particular an adhesive.
- the application of the bonding material is preferably carried out by a dispenser, a screen or stencil printer.
- the impact of the cells on the structure for example on the short leg of a sawtooth structure, hinders the flow of a liquid-viscous bonding material.
- the process according to the invention makes it possible to produce the compound of the solar cells together with the heating customary in modular construction in the course of lamination (see Wirth H.,nd KA,
- the structure of the encapsulation film supports the material distribution during melting and selectively reduces the pressure on the solar cell matrix.
- the cladding-type photovoltaic module having a front-side structured encapsulating film having at least two shingled solar cells positioned in the structure of the front-side encapsulating film and electrically connected with a bonding material, a back-side encapsulating film, and a front-side transparent cover disk and a back cover according to the present invention an overlap of the solar cells of 10 to 500 ⁇ on.
- the photovoltaic module can be produced particularly well by the method described above.
- Figures 1 to 7 serve to illustrate the invention better, but should not be considered as limiting in any way.
- FIG. 1 shows an encapsulation film (1) provided with a structure, wherein the structure predetermines the position of the solar cells to be shingled.
- a sawtooth structure is formed, wherein the long leg (2) defines the overlap width and the short leg (3) defines the overlap height.
- the short leg (3) also defines the height of the joint in which the electrically conductive connection material (8) is located (see FIG. 5).
- Figures 2 and 3 show further possibilities for structuring the encapsulating film (1).
- the positioning of the solar cells can be supported by the local pits.
- the structure may be linear along a
- FIG. 5 shows a photovoltaic module (10), wherein the structured encapsulation film (1) is placed on a cover plate (7) and the solar cells (4) are coated with the connection material (8) (eg electrically conductive adhesive, solder paste) (eg. by dispensing, screen printing, stencil printing) and placed on the structured side of the encapsulating film (1).
- This structure is heated (for example, irradiated) to establish or prepare the connection between the solar cells (4) (pre-bond).
- the back encapsulating film and cover are not shown.
- the solar cell strips (4) have the metallization strips (9) and (9 ') customary in shingled technology on opposite long edges and on different sides.
- the bonding material (8) can then be applied to the metallization strip (9) or (9 ').
- the left-hand side of FIG. 7 shows that the width of the structure (5) can extend over the entire width of the photovoltaic module (10) so that an orientation of the solar cells (4) of one cell string over adjacent te strings. In this embodiment, a particularly close spacing of the cell strings is possible.
- the right-hand side of FIG. 7 shows an offset shingle structure, ie the cells (4) of a string are shifted from one another.
Landscapes
- Photovoltaic Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016222130.2A DE102016222130A1 (de) | 2016-11-10 | 2016-11-10 | Einkapselungsfolie für ein Photovoltaikmodul in Schindelbauweise |
| PCT/EP2017/078209 WO2018087008A1 (de) | 2016-11-10 | 2017-11-03 | Einkapselungsfolie für ein photovoltaikmodul in schindelbauweise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3539160A1 true EP3539160A1 (de) | 2019-09-18 |
Family
ID=60202058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17793663.0A Withdrawn EP3539160A1 (de) | 2016-11-10 | 2017-11-03 | Einkapselungsfolie für ein photovoltaikmodul in schindelbauweise |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3539160A1 (de) |
| CN (1) | CN110073502A (de) |
| DE (1) | DE102016222130A1 (de) |
| WO (1) | WO2018087008A1 (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018112104A1 (de) * | 2018-05-18 | 2019-11-21 | Institut Für Solarenergieforschung Gmbh | Laminatfolie und verfahren zum einbetten von solarzellen zur bildung eines photovoltaikmoduls sowie verfahren zum fertigen einer laminatfolie |
| CN111293190B (zh) * | 2020-02-05 | 2022-04-15 | 晶澳(扬州)太阳能科技有限公司 | 一种太阳能电池组件及制备方法 |
| CN111293183B (zh) * | 2020-02-05 | 2021-11-19 | 晶澳(扬州)太阳能科技有限公司 | 一种光伏组件及其制备方法 |
| CN111403556A (zh) * | 2020-03-30 | 2020-07-10 | 成都晔凡科技有限公司 | 叠瓦组件的制造方法及叠瓦组件 |
| DE102020112370A1 (de) | 2020-05-07 | 2021-11-11 | Hanwha Q Cells Gmbh | Einbettungsfolie für Solarmodule, Verfahren zur Herstellung eines Solarmoduls und Verwendung einer Einbettungsfolie |
| CN111763481B (zh) * | 2020-06-08 | 2023-10-24 | 泰州隆基乐叶光伏科技有限公司 | 结构化封装材料及生产方法、光伏组件及制备方法 |
| ES2922228T3 (es) | 2020-06-16 | 2022-09-12 | Jinko Green Energy Shanghai Man Co Ltd | Parte funcional, módulo fotovoltaico y método para fabricar módulo fotovoltaico |
| CN111682082B (zh) * | 2020-07-17 | 2021-12-10 | 杭州福斯特应用材料股份有限公司 | 封装胶膜及光伏组件 |
| CN112436065B (zh) * | 2020-11-19 | 2023-10-10 | 晶科能源(滁州)有限公司 | 胶膜制备方法及胶膜 |
| DE102021105986B4 (de) * | 2021-03-11 | 2025-02-06 | M10 Solar Equipment GmbH | Verfahren und Vorrichtung zum Herstellen von Solarmodulen |
| CN119677178B (zh) * | 2024-12-03 | 2025-11-14 | 晶科能源股份有限公司 | 光伏组件的制造方法 |
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| JPH07202241A (ja) * | 1993-12-28 | 1995-08-04 | Mitsubishi Electric Corp | 太陽電池、太陽電池の実装方法および太陽電池の製造方法 |
| CN203690319U (zh) * | 2013-12-20 | 2014-07-02 | 常州亿晶光电科技有限公司 | 制作光伏组件用eva胶膜 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3346419A (en) * | 1963-11-29 | 1967-10-10 | James E Webb | Solar cell mounting |
| US4652693A (en) * | 1985-08-30 | 1987-03-24 | The Standard Oil Company | Reformed front contact current collector grid and cell interconnect for a photovoltaic cell module |
| DE3708548A1 (de) * | 1987-03-17 | 1988-09-29 | Telefunken Electronic Gmbh | Solarzellenmodul mit parallel und seriell angeordneten solarzellen |
| DE3942205C2 (de) | 1989-12-21 | 1996-02-01 | Daimler Benz Aerospace Ag | Verfahren zur Herstellung eines photovoltaischen Solargenerators |
| DE4030713A1 (de) | 1990-09-28 | 1992-04-02 | Telefunken Systemtechnik | Photovoltaischer solargenerator |
| DE10020784A1 (de) * | 2000-04-28 | 2001-11-08 | Ist Inst Fuer Solartechnologie | Photovoltaikmodul und Verfahren zu dessen Herstellung |
| JP4513204B2 (ja) * | 2000-12-18 | 2010-07-28 | 株式会社ブリヂストン | 太陽電池用封止膜 |
| JP2003051605A (ja) * | 2001-08-06 | 2003-02-21 | Haishiito Kogyo Kk | 太陽電池封止用シート |
| JP4801895B2 (ja) * | 2004-11-01 | 2011-10-26 | 新光電気工業株式会社 | 太陽電池セルの製造方法並びに太陽電池モジュール及びその製造方法 |
| US20070283996A1 (en) * | 2006-06-13 | 2007-12-13 | Miasole | Photovoltaic module with insulating interconnect carrier |
| CN102084498A (zh) * | 2008-04-08 | 2011-06-01 | 弗兰克·珀斯南斯基 | 用于产生太阳能电流的装置 |
| JP2010232311A (ja) * | 2009-03-26 | 2010-10-14 | Sekisui Chem Co Ltd | 太陽電池用封止シート |
| DE102010004112A1 (de) * | 2009-06-29 | 2010-12-30 | Bosch Solar Energy Ag | Verfahren zur Herstellung eines folienartigen elektrischen Verbinders für Solarzellen, derartig hergestelltes Verbindungselement sowie Verfahren zum elektrischen Verbinden von mindestens zwei Solarzellen zu einem Solarmodul |
| CN103165694B (zh) * | 2011-12-09 | 2016-11-23 | 聚日(苏州)科技有限公司 | 一种太阳能电池组件及其制造方法 |
| CN202585468U (zh) * | 2012-04-19 | 2012-12-05 | 上海艾力克太阳能科技有限公司 | 太阳能电池组件带槽eva |
| US9780253B2 (en) | 2014-05-27 | 2017-10-03 | Sunpower Corporation | Shingled solar cell module |
| JP2014154628A (ja) * | 2013-02-06 | 2014-08-25 | Nitto Denko Corp | 太陽電池モジュールの製法 |
-
2016
- 2016-11-10 DE DE102016222130.2A patent/DE102016222130A1/de active Pending
-
2017
- 2017-11-03 EP EP17793663.0A patent/EP3539160A1/de not_active Withdrawn
- 2017-11-03 CN CN201780069821.2A patent/CN110073502A/zh active Pending
- 2017-11-03 WO PCT/EP2017/078209 patent/WO2018087008A1/de not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07202241A (ja) * | 1993-12-28 | 1995-08-04 | Mitsubishi Electric Corp | 太陽電池、太陽電池の実装方法および太陽電池の製造方法 |
| CN203690319U (zh) * | 2013-12-20 | 2014-07-02 | 常州亿晶光电科技有限公司 | 制作光伏组件用eva胶膜 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2018087008A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018087008A1 (de) | 2018-05-17 |
| DE102016222130A1 (de) | 2018-05-17 |
| CN110073502A (zh) | 2019-07-30 |
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