WO2017032377A1 - Procédé de fabrication d'un panneau de cellules solaires et panneau de cellules solaires fabriqué au moyen dudit procédé - Google Patents
Procédé de fabrication d'un panneau de cellules solaires et panneau de cellules solaires fabriqué au moyen dudit procédé Download PDFInfo
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- WO2017032377A1 WO2017032377A1 PCT/DK2016/050276 DK2016050276W WO2017032377A1 WO 2017032377 A1 WO2017032377 A1 WO 2017032377A1 DK 2016050276 W DK2016050276 W DK 2016050276W WO 2017032377 A1 WO2017032377 A1 WO 2017032377A1
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- WIPO (PCT)
- Prior art keywords
- casting material
- solar cell
- transparent
- cell panel
- front plate
- Prior art date
Links
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
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- 238000005266 casting Methods 0.000 claims abstract description 61
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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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/42—Cooling means
-
- 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
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/40—Optical elements or arrangements
- H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
- H10F77/45—Wavelength conversion means, e.g. by using luminescent material, fluorescent concentrators or up-conversion arrangements
-
- 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
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/40—Optical elements or arrangements
- H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
- H10F77/484—Refractive light-concentrating means, e.g. lenses
-
- 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
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/60—Arrangements for cooling, heating, ventilating or compensating for temperature fluctuations
- H10F77/63—Arrangements for cooling directly associated or integrated with photovoltaic cells, e.g. heat sinks directly associated with the photovoltaic cells or integrated Peltier elements for active cooling
-
- 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
- Y02E10/52—PV systems with concentrators
Definitions
- the present invention relates to a method for manufacturing a solar ceil panel for producing electrical power from sunlight and to a solar cell panel manufactured using such a method, Background of the invention
- a solar ceil panel is a photovoltaic component for direct generation of electrical power from sunlight. Key factors in cost-efficient generation of solar power are the efficiency of the solar cells used and the production costs and the life expectancy of the solar cell panels.
- the typical conventional solar cell panel is composed of a front side made of glass, interconnected soldered solar ceils, an embedding material and a rear side structure.
- the individual layers of the solar module fulfil the functions described more fully below.
- the glass front side serves as a protection against mechanical and atmospheric influences. It must exhibit maximum possible transparency in order to minimize, as much as possible, absorption losses in the optical spectral region from 300 nm to 1150 nm because such absorption losses are the direct cause of effi ciency losses of the silicon solar cells conventionally used for power generation.
- hardened white glass with a thickness of 3 or 4 mm and a low iron content having a transmittance in the visible spectral region from 400 nm to 1.150 nm amounting to 90-91.5 % is used.
- the reflective loss is typically between 8 and 14 %. Unfortunately, the loss in the region from 300 nm to 400 nm is very high because the radiation at these wavelengths is filtered by the glass.
- the embedding material serves as the adhesive for the whole module composite.
- EVA ethylene vinyl acetate
- EVA melts during a lamination operation at a temperature of about 150 °C, flows into the gaps between the soldered solar cells and is thermally cross-linked. The formation of air bubbles, which lead to reflection losses, is prevented by lamination under vacuum.
- the rear side protects the solar cells and the embedding material against humidity and oxygen. In addition, it serves as a mechanical protection against scratching, etc., during assembly of the solar cell panel and as electrical insulation.
- the rear side structure may be made of either glass or, more commonly, a composite film. In general, the variants PVF-PET-PVF or PVF-aluminium-PVF are used. (PVF is an
- the encapsulation materials used in solar cell panel construction should exhibit good barrier properties against water vapour and oxygen.
- the solar 20 cells themselves are not attacked by water vapour or oxygen, corrosion of the metal contacts and chemical degradation of the E VA embedding material may take place, A single broken solar cell contact typically results in a complete failure of the module, since normally all the solar cells in a module are electrically interconnected in series.
- a degradation of the EVA manifests itself in a yellowing of the module, combined with a corresponding reduction in power production due to reduced light absorption and a visual deterioration.
- solar cell panels In order to achieve competitive production costs for solar power despite the relatively high capital costs, solar cell panels must achieve long operating times. Present-day solar cell panels are therefore designed for a service life of 20 to 30 years. In addition to high stability under atmospheric conditions, there are major requirements for the thermal endurance of the modules, whose temperature during operation may vary cyclically between +80 °C in full sunlight and temperatures below zero. Solar cell panels are subject to comprehensive stability tests (standard tests to IEC 1215), which include atmospheric tests (UV irradiation, damp heat, temperature change), hail tests and high voltage insulation tests.
- the solar cell panel construction accounts for about 30 % of the overall costs and, thus, represents a relatively high proportion of the production costs for solar ceil panels.
- This large share of the module manufacture is mainly caused by high material costs (hail-proof 3-4 mm thick iron free front glass, multi-layer film on rear side) and by long process times, i.e. low productivity.
- the individual layers of the module composite as described above are still assembled and aligned manually.
- the relatively slow melting of the EVA hot melt adhesive and the lamination of the module composite at approx. 150 °C under vacuum lead to production cycle times of 20-30 minutes per module.
- the present invention relates to a method for manufacturing a solar cell panel, which method comprises the steps of casting a front plate of the solar cell panel from a first transparent casting material, and using the rear side of the casted front plate as an open mould, into which mould solar cells, cooling fins and electric
- interconnections are arranged and embedded using a second transparent casting material, thus forming a rear plate of the solar cell panel embedded with the front plate thereof.
- the method further comprises, before the step of using the casted front plate as an open mould, a step of casting an reinforcement frame for the solar ceil panel from the first transparent casting material, which reinforcement frame is subsequently glued onto the rear side of the front plate along the edges thereof for forming a peripheral wall of the open mould,
- the reinforcement frame is glued onto the rear side of the front plate using a layer of the second transparent casting material.
- the layer of the second transparent casting material used as glue is less than 0.5 mm, preferably approximately 0. 1 mm.
- the casted front plate comprises an reinforcement frame arranged on its rear side along the edges thereof, the reinforcement frame forming a peripheral wall of the open mould.
- the step of using the casted front plate as an open mould is initiated by covering the rear side of the front plate with a layer of the second casting material.
- the layer of the second transparent casting material covering the rear side of the front plate is less than 0.5 mm, preferably approximately 0.1 mm.
- a plurality of solar cells, cooling fins and electric interconnections are placed within the reinforcement frame in the layer of the second transparent casting material and are subsequently covered by a layer of the second transparent casting material, after which the second transparent casting material, now embedding the solar cells, the cooling fins and the connection elements, is hardened.
- the deposition of the solar cells can take place directly on the rear side of the front plate.
- the solar cells and the electric interconnections are embedded in and thereby fixed inside the second transparent casting material, it is possible to use solar cells 15 with a thickness of down to 0.12-0.14 mm rather than the normally used thickness of 0.2-0,5 mm, whereby costs and weight can be reduced and a higher efficiency can be obtained.
- the solar cells have a thickness of 0.165 mm.
- the cooling fins are mounted onto the solar cells by- means of a heat-conducting paste.
- the electric interconnections comprises a plurality of copper strips.
- stiffening ribs 30 and/or fastening elements are placed within the reinforcement frame before the covering layer of the second transparent casting material is added.
- additional fixing and/or reinforcing elements can, for instance, be formed as recesses, grooves or depressions in the rear side of the front plate for the 5 pl acement, fixing and securing of the sol ar cells and interconnections/cooling
- one or more of the cooling fins also form
- one or more of the cooling fins also act as stiffening ribs.
- the necessary electric connections within the solar cell panel are formed using laser welding through the transparent material.
- the polyurea/polyurethane hybrid polymer is optically open, it will not block any light, neither the laser.
- the laser welding is performed using a ring laser welding principle.
- a preferred process for making the connections is a ring laser welding principle known as SHADOW laser welding. Stepless High Speed Accurate and Discrete One Pulse Welding makes it possible to laser weld, for instance, cobber and silver together.
- electrical connectors for the solar cell panel are mounted in threaded bores, which are made through the reinforcement frame after the embedding of the solar cells, cooling fins and electric interconnections.
- an array of multiplier lenses are embedded in the front side panel during the casting thereof.
- the solar cell panel has an array of sunlight concentrating multiplier lenses on the front side. This increases the efficiency of the solar ceils.
- the array of lenses has a much larger surface area compared to a flat glass plate.
- the surface of the lenses are increased up to 71 % more than the surface of a
- the multiplier lenses are provided with anti- reflection nanostructures.
- the front plate and/or the rear plate of the solar cell panel are curved in two directions.
- the first and/or the second casting material comprise nanoparticies that are able to convert ultraviolet light into visible light.
- the second transparent casting material is softer than the first transparent casting material at normal room temperatures.
- the first transparent casting material and/or the second transparent casting material are transparent polyurea/poiyurethane hybrid polymers comprising two types of resin, the first resin being a prepolymer of an aliphatic diisocyanate and an amine-terminated poly ether polyol, the second resin being a mixture of compounds containing isocyanate-reactive groups.
- transparent polyurea/polyurethane hybrid polymer describes a polyurea/polyurethane hybrid polymer, which exhibits a transmission of 91 % or more at wavelengths in the range between 360 nm and 1150 nm. Such a hybrid polymer is advantageous compared to polyurea, which is not transparent, and to polyurethane, which can be transparent but is not optically open for ultraviolet light.
- polyurea/polyurethane hybrid polymer Compared to glass, polyurea/polyurethane hybrid polymer has the advantage of simpler mechanical workability and simple formability during the production process. This makes it relatively easy to texture the surface, thereby increasing light absorption through surfaces turned obliquely towards the light and, hence, increasing the efficiency of the solar cell panels.
- the mechanical stability of the module is ensured both by the rear side and by the front side.
- the main requirement for the front side of the solar cell panel is a high transparency in the visible, ultraviolet and infrared spectral region with wavelengths from 300 nm to about 1500 nm, especially from 320 nm to 1150 nm, in order to guarantee a high photoelectric efficiency of the solar cells.
- the front and rear sides of the module must both exhibit a generally high stability under atmospheric conditions (e.g., under UV radiation) and protect the embedded solar cells against corrosion by suitable barrier properties (e.g., against water vapour and oxygen).
- a polyurea/polyurethane hybrid polymer offers high stability under atmospheric conditions, it has the advantage of low material costs, it has a low density and hence a low weight and it has a rapid process ability (approximately 2 minutes) at temperatures as low as about 100 °C. Furthermore, the material is impact-resistant.
- the first transparent casting material and the second transparent casting material are transparent polyurea/polyurethane hybrid polymers comprising the same two types of resin, only in different mixture proportions.
- the first transparent casting material is composed of between 70 % and 80 % of the first type of resin and between 20 % and 30 % of the second type of resin, corresponding to a mixture ratio of between 2.33 and 4.00.
- the second transparent casting material is composed of between 45 % and 55 % of each of the two types of resin,
- Fig. la illustrates a perspective view of solar cell panel according to an embodiment of the invention as seen from the front side with an enlarged detail view of a part thereof
- Fig. lb illustrates a perspective view of the same embodiment of the invention as shown in Fig. la as seen from the rear side, also with an enlarged detail view of a part thereof,
- FIG. 2a illustrates a plane view of the same embodiment of the invention as shown in Figs, a and b as seen from the rear side,
- Fig. 2 b illustrates a plane view of the same embodiment of the invention as shown in Figs, la and lb as seen from the front side,
- Fig. 3a is similar to Fig. 2b with the exception that section lines C-C and D-D have been added,
- Fig. 3b illustrates a cross-section of the solar cell panel along the section line C-C 15 in Fig. 3a with an enlarged detail view of a part thereof
- Fig. 4a illustrates another cross-section of the same solar cell panel along the section line D-D in Fig. 3a with an enlarged detail view of a part thereof
- FIG. 4b illustrates the same cross-section as Fig. 4a with an enlarged detail view of another part thereof
- Fig. 5 illustrates an exploded view of the same embodiment of the solar cell panel as shown in the previous figures.
- Figs, l a and l b illustrate schematically a preferred embodiment of the invention as seen from the front side and the rear side, respectively. Both of the figures comprise 30 an enlargement of a part thereof In the shown embodiment, the front plate 3
- Figs. 2a and 2b are side views of the same embodiment of the invention as seen from the rear side and the front side, respectively.
- Fig. 3a is similar to Fig. 2b with the exception that two section lines (C-C and D-D) are indicated.
- Fig. 3b is a cross-sectional view along section line C-C of the preferred embodiment of the solar cell panel illustrated in Fig. 3a with an enlarged part thereof.
- Fig. 4a is a cross-sectional view along section line D-D of the embodiment shown in Fig. 3a, i.e. in a direction perpendicular to the section line C-C used in Fig. 3b, Also Fig. 4a comprises an enlarged part, showing in more detail some of the same elements as Fig. 3b. Fig. 4b illustrates the same cross-section as Fig. 4a, only with an enlarged detail view of another part thereof.
- the enlarged part of Fig, 4b schematically illustrates the working principle of the multiplier micro lenses 10 and of the quantum dots 3 used in the illustrated embodiment
- the arrow 1 1 illustrates an incoming ray of sunshine, i.e. a sunbeam.
- the casting process embeds an array of multiplier micro lenses 10 within the front plate 3.
- These multiplier micro lenses 10 "amplify" the sunlight by a factor of 2.2 to 2.5. In short, more light is "caught” because the surface is much larger.
- the rays 1 1 reach the surface of the solar cell panel, a part of the rays 11 are reflected in the surface layer and never reach the solar cells 8.
- Multiplier micro lenses 10 minimise this problem.
- the use of multiplier micro lenses 10 can increase the surface area irradiated by the sun by approximately 71 % compared to a flat glass plate.
- the multiplier micro lenses 0 also causes the solar cell panel to be less sensitive to the incoming angle of the solar radiation. Tests show that the solar cell panel can be placed in an angle compared to the horizontal plane from 5° to 75° and still produce electricity at full efficiency. Existing solar cell panels typically only produce at full efficiency when the angle is between 25° to 45° depending of the time of the year and the physical location in the world. This results in a 50 % increase in electrical production during a day compared to existing technology.
- the efficiency of the solar cell panel can be increased through so-called
- incoming rays 11 are deflected by the multiplier micro lenses 10 and are thereby reinforced 12 and reach the solar ceils 8 at a better angle with higher efficiency.
- ® Light in the ultraviolet or infrared range 17 are dissipated by quantum dots 13 and emitted in a different frequency spectrum, i.e. in another wavelength range, in which solar cells 8 are more reactive.
- quantum dots 13 When passing the quantum dots 13, ultraviolet sunbeams 17 are shifted to sunbeams 18 with lower energy, while infrared sunbeams 17 are shifted to sunbeams 18 with higher energy.
- Fig. 5 is an exploded view of a preferred embodiment of the solar cell panel illustrating, apart from the elements shown in the previous figures, different interconnections 2, 7, 16, for instance for the minus pole 2 and for the plus pole 7.
- the solar cell panel according to the present invention can be produced using the following method:
- a mixture of a transparent polyurea/polyurethane hybrid polymer is placed in a mould to form the transparent front plate 3 of the panel with the multiplier micro lenses 10 and, optionally, recesses on the rear side thereof for placement of solar cells 8 and electrical connections 2, 7, 9, 16.
- Another softer mixture of resin is placed on the rear side of the front plate 3, which now acts as a cavity of an open mould.
- the solar cells 8 are positioned in the mould in such a way that the optically active side faces the hollow of the mould.
- the rear side is covered with a softer version of the transparent polyurea/polyurethane hybrid polymer with a longer hardening time.
- a low-pressure or pressure-less casting method is used in order to secure that the fragile soiar cells 8 are not destroyed.
- the initial components of the reaction system should be devolatilized prior to fabrication.
- pronounced flow deflections and large pressure jumps are to be avoided during the introduction of the reaction system into the mould. If there are blisters or bobbies in the mixtures, they are removed with gas flames. The gas flame will remove any oxygen from the rear side and "suck" bobbles away.
- the solar cell panels can be produced by a process, in which the transparent polyurea/polyurethane hybrid polymer rear plate is replaced by a transparent polyurethane compound.
- the electrical connections are made, preferably by laser welding the interconnections 2, 7, 16 to the solar cells 8. Because the
- polyurea/polyurethane hybrid polymer is optically open, it will not block any light, neither the laser light used for the welding. 1. Rear plate of solar cell panel
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- Photovoltaic Devices (AREA)
Abstract
L'invention concerne un procédé de fabrication d'un panneau de cellules solaires, lequel procédé comprend les étapes consistant à couler une plaque avant (3) du panneau de cellules solaires à partir d'un premier matériau de moulage transparent, et à utiliser le côté arrière de la plaque avant coulée en tant que moule ouvert, dans lequel sont disposées et intégrées des cellules solaires de moule (8), des ailettes de refroidissement (15) et des interconnexions électriques (4, 7, 9, 16) à l'aide d'un second matériau de moulage transparent, formant ainsi une plaque arrière (1) du panneau de cellules solaires intégré avec sa plaque avant. En outre, l'invention concerne un panneau de cellules solaires fabriqué à l'aide d'un tel procédé.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA201570557A DK178881B1 (en) | 2015-08-27 | 2015-08-27 | A method for manufacturing a solar cell panel and a solar cell panel manufactured using such a method |
DKPA201570557 | 2015-08-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017032377A1 true WO2017032377A1 (fr) | 2017-03-02 |
Family
ID=56802197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK2016/050276 WO2017032377A1 (fr) | 2015-08-27 | 2016-08-18 | Procédé de fabrication d'un panneau de cellules solaires et panneau de cellules solaires fabriqué au moyen dudit procédé |
Country Status (2)
Country | Link |
---|---|
DK (1) | DK178881B1 (fr) |
WO (1) | WO2017032377A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110739360A (zh) * | 2018-07-18 | 2020-01-31 | 帕利特股份有限公司 | 用于制造面状结构元件的方法和结构元件 |
CN111403512A (zh) * | 2018-12-27 | 2020-07-10 | 汉能移动能源控股集团有限公司 | 光伏组件、制备工艺及制备用uv转印模 |
CN115274897A (zh) * | 2022-07-18 | 2022-11-01 | 江苏中来新材科技有限公司 | 一种高反射的光转换光伏背板和双面光伏组件 |
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US20080135088A1 (en) * | 2006-12-11 | 2008-06-12 | Sunmodular, Inc. | Interlocking solar roof tiles with heat exchange |
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CN110739360A (zh) * | 2018-07-18 | 2020-01-31 | 帕利特股份有限公司 | 用于制造面状结构元件的方法和结构元件 |
CN111403512A (zh) * | 2018-12-27 | 2020-07-10 | 汉能移动能源控股集团有限公司 | 光伏组件、制备工艺及制备用uv转印模 |
CN115274897A (zh) * | 2022-07-18 | 2022-11-01 | 江苏中来新材科技有限公司 | 一种高反射的光转换光伏背板和双面光伏组件 |
CN115274897B (zh) * | 2022-07-18 | 2023-06-06 | 江苏中来新材科技有限公司 | 一种高反射的光转换光伏背板和双面光伏组件 |
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DK178881B1 (en) | 2017-04-24 |
DK201570557A1 (en) | 2017-03-13 |
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