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WO2019031378A1 - Module de cellule solaire et produit intermédiaire de module de cellule solaire - Google Patents

Module de cellule solaire et produit intermédiaire de module de cellule solaire Download PDF

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Publication number
WO2019031378A1
WO2019031378A1 PCT/JP2018/029014 JP2018029014W WO2019031378A1 WO 2019031378 A1 WO2019031378 A1 WO 2019031378A1 JP 2018029014 W JP2018029014 W JP 2018029014W WO 2019031378 A1 WO2019031378 A1 WO 2019031378A1
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WIPO (PCT)
Prior art keywords
sealing material
material layer
solar cell
cell module
photoelectric conversion
Prior art date
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Ceased
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PCT/JP2018/029014
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English (en)
Japanese (ja)
Inventor
剛士 植田
直樹 栗副
善光 生駒
元彦 杉山
惠美 宮崎
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Publication of WO2019031378A1 publication Critical patent/WO2019031378A1/fr
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    • 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
    • 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 solar cell module and an intermediate product thereof, and a solar cell module whose surface protection substrate is made of a transparent resin and an intermediate product thereof.
  • the solar cell module basically includes a first protective substrate, a first sealing material layer, a photoelectric conversion portion, a second sealing material layer, and a second protective substrate in this order. It has become. That is, by covering the front and back surfaces of the photoelectric conversion unit with the first protective substrate and the first sealing material layer, and the second sealing material layer and the second protective substrate, protection of the photoelectric conversion unit is achieved.
  • a plurality of solar cells are arranged in a matrix, and adjacent solar cells are electrically connected by tab wiring (see, for example, Patent Document 1).
  • the resin material has a coefficient of linear expansion greater than that of glass, and the effect of expansion and contraction due to temperature change is large. Therefore, when the resin material in the solar cell module expands and contracts with the temperature change, the stress caused by the expansion and contraction is transmitted to the photoelectric conversion portion.
  • the resin material in the solar cell module expands and contracts with the temperature change, the stress caused by the expansion and contraction is transmitted to the photoelectric conversion portion.
  • both of the front and back protective substrates are made of a resin material
  • the protective substrate is deformed due to temperature change, it is transmitted to the photoelectric conversion portion through the adjacent sealing material layer. As a result, there is a possibility that the photovoltaic cell may be damaged or the tab wiring may be cut in the photoelectric conversion unit.
  • the solar cell module of patent document 2 contains a fibrous inorganic compound
  • the said fibrous inorganic compound is made to impregnate transparent polymer resin, and is used as a coating material of a photoelectric conversion element. That is, the said fibrous inorganic compound is for the purpose of protecting a photoelectric conversion element from the impact from the outside, and ensuring a flame retardance, and preventing breakage of a photovoltaic cell and cutting of a tab wiring. It is not the purpose.
  • the present invention has been made in view of the problems of the prior art. And the object of the present invention is to provide an intermediate product of a solar cell module and a solar cell module in which breakage of the solar cell and breakage of the tab wiring are less likely to occur in the photoelectric conversion portion even when temperature change occurs. It is in.
  • the solar cell module comprises, in order from the light receiving surface side, a first protective substrate made of resin, a first sealing material layer, a photoelectric conversion portion, and a second sealing material layer; And a second protective substrate.
  • the fiber layer is disposed between the photoelectric conversion unit and the second sealing material layer in a state of being in contact with the photoelectric conversion unit or in a state of being buried in the second sealing material layer.
  • the linear expansion coefficient of a fiber layer is smaller than the linear expansion coefficient of a 1st sealing material layer and a 2nd sealing material layer.
  • the solar cell module includes, in order from the light receiving surface side, a first protective substrate, a first sealing material layer, a photoelectric conversion portion, a second sealing material layer, and a second protection. And a substrate.
  • the fiber layer is disposed between the photoelectric conversion unit and the second sealing material layer in a state of being in contact with the photoelectric conversion unit or in a state of being buried in the second sealing material layer.
  • the linear expansion coefficient of a fiber layer is smaller than the linear expansion coefficient of a 1st sealing material layer and a 2nd sealing material layer.
  • the intermediate product of the solar cell module according to the third aspect of the present invention has a first sealing material layer, a photoelectric conversion part, and a second sealing material layer in this order, and the photoelectric conversion part and the second sealing are provided.
  • the linear expansion coefficient of a fiber layer is smaller than the linear expansion coefficient of a 1st sealing material layer and a 2nd sealing material layer.
  • a mobile according to a fourth aspect of the present invention is a mobile including the solar cell module according to the first or second aspect.
  • FIG. 1 is a top view showing a solar cell module according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of the solar cell module taken along line AA of FIG.
  • FIG. 3 is a top view showing a form in which a fiber layer is disposed around a solar battery cell.
  • FIG. 4 is a top view showing a form in which a fiber layer is arranged so as to bridge between adjacent solar cells.
  • FIG. 5 is a cross-sectional view of the solar cell module along the line BB in FIG.
  • FIG. 6 is a cross-sectional view showing a form in which a flexible film is provided between the first protective substrate and the first sealing material layer and between the second sealing material layer and the second protective substrate.
  • FIG. 7 is a cross-sectional view showing a state in which a first protective substrate and a second protective substrate are formed on the intermediate product (a) of the solar cell module to form a finished solar cell module (b).
  • FIG. 1 is a top view of the solar cell module 100.
  • the solar cell module 100 of the present embodiment is rectangular in a plan view, and defines a rectangular coordinate system including an x-axis, a y-axis, and a z-axis.
  • the x axis and the y axis are orthogonal to each other in the plane of the solar cell module 100.
  • the z-axis is perpendicular to the x-axis and the y-axis, and extends in the thickness direction of the solar cell module 100.
  • the positive direction of each of the x-axis, y-axis and z-axis is defined in the direction of the arrow in FIG. 1, and the negative direction is defined in the direction opposite to the arrow.
  • the main plane disposed on the positive direction side of the z axis is the “light receiving surface”
  • the main plane disposed on the negative direction side of the z axis is the “back side”.
  • a "light-receiving surface” means the surface into which light mainly injects
  • a "back surface” may mean the surface on the opposite side to a light-receiving surface.
  • the positive direction side of the z axis may be referred to as "light receiving surface side”
  • the negative direction side of the z axis may be referred to as "rear surface side”.
  • the “upper” in the above description may be on the positive side of the z-axis or on the negative side of the z-axis. Furthermore, “abbreviation” indicates that they differ within a range of error, that is, they are substantially identical.
  • the solar cell module 100 includes a plurality of solar cells 10, a plurality of tab wires 12, and a plurality of connection wires 14.
  • the solar battery cell 10 is formed of, for example, a semiconductor material such as crystalline silicon, gallium arsenide (GaAs), or indium phosphide (InP).
  • a semiconductor material such as crystalline silicon, gallium arsenide (GaAs), or indium phosphide (InP).
  • the structure of the solar battery cell 10 is not particularly limited, but here, as an example, it is assumed that crystalline silicon and amorphous silicon are stacked.
  • each solar battery cell 10 a plurality of finger electrodes extending in the x-axis direction parallel to each other and a y-axis direction extending orthogonal to the plurality of finger electrodes
  • a plurality of, for example, two bus bar electrodes are provided.
  • the bus bar electrode connects each of the plurality of finger electrodes.
  • the plurality of solar cells 10 are arranged in a matrix on the xy plane.
  • four solar battery cells 10 are arranged in the x-axis direction (the short direction in the rectangular shape), and five solar battery cells 10 are arranged in the y-axis direction (the longitudinal direction in the rectangular shape).
  • the number of solar battery cells 10 arranged in the x-axis direction and the number of solar battery cells 10 arranged in the y-axis direction are not limited to these.
  • Five solar cells 10 arranged in parallel in the y-axis direction are connected in series by the tab wiring 12 to form one solar cell string 16.
  • the solar cell string 16 may show only the some photovoltaic cell 10, and may show the combination of the some photovoltaic cell 10 and the some tab wiring 12.
  • the tab wiring 12 electrically connects the bus bar electrode on one light receiving surface side of the adjacent solar cells 10 and the bus bar electrode on the other back surface side. That is, the adjacent solar cells 10 are electrically connected to each other by the tab wiring 12.
  • the tab wiring 12 is an elongated metal foil, and for example, a copper foil coated with solder, silver or the like is used. Resin is used for connection between the tab wiring 12 and the bus bar electrode.
  • the resin may be either conductive or nonconductive, but the tab wiring 12 and the bus bar electrode need to be electrically and mechanically connected. That is, in the latter case, the tab wiring 12 and the bus bar electrode are electrically connected by being directly connected. Further, the connection between the tab wiring 12 and the bus bar electrode may use solder instead of resin.
  • each of the solar cell 10 and the solar cell string 16 may be a “photoelectric conversion part”, and the combination of the plurality of solar cell strings 16 and the connection wiring 14 is a “photoelectric conversion part” It is also good.
  • the solar cell module of the present embodiment includes, in order from the light receiving surface side, a first protective substrate made of resin, a first sealing material layer, a photoelectric conversion portion, a second sealing material layer, and a second protective substrate.
  • the fiber layer is disposed between the photoelectric conversion unit and the second sealing material layer in a state of being in contact with the photoelectric conversion unit or in a state of being buried in the second sealing material layer.
  • the linear expansion coefficient of a fiber layer is smaller than the linear expansion coefficient of a 1st sealing material layer and a 2nd sealing material layer.
  • the photoelectric conversion portion can be configured to include one or more solar battery cells connected by tab wiring.
  • the solar cell module 100 includes the solar cell string 16 including the solar cell 10 and the tab wiring 12, the connection wiring 14, the fiber layer 24, the second protective substrate 20, and a pair of sealing material layers
  • the first sealing material layer 26, the second sealing material layer 22), and the first protective substrate 28 are included.
  • each of the second protective substrate 20, the first protective substrate 28, the first sealing material layer 26, and the second sealing material layer 22 is made of, for example, a resin material.
  • the resin material greatly expands and contracts due to temperature change, and when the solar cell module 100 receives heat such as the heat of irradiation of sunlight, the resin material expands and contracts. Therefore, the stress resulting from the expansion and contraction of the resin material may be transmitted to the photoelectric conversion unit, which may cause an adverse effect on the photoelectric conversion unit. Therefore, in the present embodiment, the linear expansion coefficient is in a state of being in contact with the photoelectric conversion portion between the photoelectric conversion portion and the second sealing material layer 22, or in a state of being buried in the second sealing material layer 22.
  • a fiber layer 24 smaller than the linear expansion coefficient of the first sealing material layer 26 and the second sealing material layer 22 is disposed. Thereby, even if the resin material constituting any of the layers expands and contracts due to a temperature change, the fiber layer 24 is difficult to follow the expansion and contraction, so the stress caused by the expansion and contraction of the resin material is transmitted to the photoelectric conversion portion It becomes difficult to be done. As a result, damage to the solar cell and breakage of the tab wiring can be prevented in the photoelectric conversion unit.
  • the first protective substrate will be described as the protective substrate on the light receiving surface side
  • the second protective substrate as the protective substrate on the opposite side (rear surface side).
  • the first protective substrate 28 is disposed on the light receiving surface side of the solar cell module 100, and protects the surface of the solar cell module 100.
  • the material for forming the first protective substrate 28 is not particularly limited.
  • polyethylene (PE), polypropylene (PP), cyclic polyolefin, polycarbonate (PC), polymethyl methacrylate (PMMA), polytetrafluoroethylene (PTFE), At least one selected from the group consisting of polystyrene (PS), polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) can be used.
  • the first protective substrate 28 more preferably contains polycarbonate (PC).
  • PC polycarbonate
  • PC is preferable for protecting the surface of the solar cell module 100 because it is excellent in impact resistance and light transmission.
  • the thickness of the first protective substrate 28 is not particularly limited as long as it plays a role of protecting the surface of the solar cell module 100, but is preferably 0.1 to 15 mm, and more preferably 0.5 to 10 mm. By setting it as such a range, the solar cell module 100 can be protected appropriately and light can efficiently reach the solar cell 10.
  • the tensile modulus of elasticity of the first protective substrate 28 is not particularly limited, but is preferably 1.0 GPa or more and 10.0 GPa or less, and more preferably 2.3 GPa or more and 2.5 GPa or less. By setting the tensile elastic modulus of the first protective substrate 28 in such a range, the surface of the solar cell module 100 can be protected appropriately.
  • the tensile modulus of elasticity is, for example, according to Japanese Industrial Standard JIS K7161-1 (Plastics-Determination of tensile properties-Part 1: General rules), as in the following formula (1), test temperature 25 ° C, test speed 100 mm / It can be measured in minutes.
  • Et ( ⁇ 2- ⁇ 1) / ( ⁇ 2- ⁇ 1) formula (1)
  • Et represents a tensile elastic modulus (Pa)
  • the total light transmittance of the first protective substrate 28 is not particularly limited, but is preferably 80 to 100%, and more preferably 85 to 95%. By setting the total light transmittance of the first protective substrate 28 in such a range, light can efficiently reach the solar battery cell 10.
  • the total light transmittance can be measured, for example, by a method such as JIS K7361-1 (Plastic-Test method for total light transmittance of transparent material-Part 1: Single beam method).
  • the first sealing material layer 26 and the second sealing material layer 22 seal the photoelectric conversion unit including the solar battery cell 10 and the tab wiring 12.
  • the second sealing material layer 22 is disposed on the positive direction side (upper side) of the z-axis of the second protective substrate 20, and the first sealing material layer 26 is in the negative direction of the z-axis of the first protective substrate 28. It is arranged on the side (lower side).
  • the first sealing material layer 26 for example, a gel having a tensile elastic modulus of 0.001 MPa to 1 MPa and a loss coefficient of 0.1 to 0.52 is used.
  • Such gel is, for example, silicone gel, acrylic gel, urethane gel and the like.
  • the tensile modulus is 0.022 MPa.
  • the loss factor is the ratio G "/ G 'of the storage shear modulus (G') to the loss shear modulus (G") and is given as tan ⁇ .
  • the loss factor indicates how much energy the material absorbs as the material deforms, and the larger the value of tan ⁇ , the more energy it absorbs. This loss factor is measured by a dynamic viscoelasticity measuring device.
  • the first sealing material layer 26 is formed of a rectangular sheet material having translucency and having a slightly smaller dimension in the xy plane of the first protective substrate 28.
  • the first sealing material layer 26 may be liquid.
  • thermoplastic resins like resin films such as EVA, PVB (polyvinyl butyral), a polyimide, are used, for example.
  • thermosetting resin may be used.
  • EVA is used.
  • the tensile modulus is 0.01 to 0.25 GPa and the loss factor is 0.05.
  • the second sealing material layer 22 is formed of a rectangular sheet material having translucency and having a surface having substantially the same dimension as the xy plane of the first protective substrate 28.
  • the second sealant layer 22 preferably contains an infrared reflective pigment.
  • the sunlight (infrared light) that has passed through the periphery of the solar battery cell 10 and reaches the second sealing material layer 22 is reflected on the surface Since the light is incident on the solar battery cell 10, the photoelectric conversion efficiency can be improved.
  • the content is 100 parts by mass of the resin constituting the second sealing material layer 22 from the viewpoint of sufficiently reflecting infrared rays and improving the photoelectric conversion efficiency.
  • the infrared reflective pigment is intended to reflect infrared light on the surface of the second sealing material layer 22, and thus may be contained only in the vicinity of the surface of the second sealing material layer 22.
  • the infrared reflective pigment is, for example, a compound (oxide or the like) containing an element such as Mg, Si, Al, Ti, Fe, Zn, Co, Ca, Sr, Ba, Cu, etc., and has an infrared reflectance. Are high pigments.
  • the solar cell string 16 is formed by connecting the plurality of solar cells 10 arranged in the y-axis direction (longitudinal direction of the rectangular shape) by the tab wiring 12. Further, the connection wiring 14 is connected to the positive side end and the negative side end of the y-axis of the solar cell string 16. The connection wiring 14 and the solar cell string 16 are disposed on the negative side of the z-axis of the first sealing material layer 26. Furthermore, each of the plurality of solar cells 10 is formed in a flat plate shape having a light receiving surface and a back surface. In such a configuration, when a load is applied from the upper side of FIG. 2, the first protective substrate 28, the first sealing material layer 26, and the second sealing material layer 22 buffer the solar cell module 100. Control the damage.
  • the fiber layer 24 is disposed between the photoelectric conversion unit and the second sealing material layer 22 in a state of being in contact with the photoelectric conversion unit or in a state of being buried in the second sealing material layer 22.
  • the linear expansion coefficient of the fiber layer 24 is smaller than the linear expansion coefficient of the first sealing material layer 26 and the second sealing material layer 22.
  • the difference is preferably 200 K ⁇ 1 or more.
  • the linear expansion coefficient of the fiber layer 24 is preferably 30 ⁇ 10 ⁇ 6 K ⁇ 1 or less, and 20 ⁇ 10 ⁇ 6 K ⁇ 1 or less from the viewpoint of sufficiently blocking the stress due to the expansion and contraction of the resin material. More preferable.
  • carbon fiber As a fiber which comprises the fiber layer 24, carbon fiber, glass fiber, metal fiber (aluminum fiber etc.) can be used, Among them, carbon fiber or glass fiber is preferable. Moreover, as a carbon fiber, any of PAN type carbon fiber and pitch type carbon fiber can be used. In addition, when glass fiber is used, since insulation ensuring becomes easy, it is preferable.
  • the fiber layer 24 has many voids communicating from one side to the other side, and a part of the sealing material constituting the second sealing material layer 22 is the fiber layer 24. It is preferable to be in contact with the photoelectric conversion portion in a state of penetrating the void of
  • the sealing material constituting the second sealing material layer 22 passes through the air gap and reaches the photoelectric conversion portion side, and the fiber layer 24 and the photoelectric conversion It also functions as an adhesive that adheres to a part (solar battery cell). Therefore, both can be firmly fixed without requiring an adhesive for bonding the fiber layer 24 and the photoelectric conversion unit separately.
  • EVA is preferable in the illustration of a sealing material as stated above as a preferable thing to make it function as an adhesive material as mentioned above.
  • the sealing material which comprises the 2nd sealing material layer 22 passes the space
  • the sealing material constituting the second sealing material layer 22 can not sufficiently pass through the fiber layer 24, such as when there are few voids in the fiber layer 24 or when the voids are fine, a fiber layer using an adhesive separately 24 and the photoelectric conversion unit may be bonded.
  • an acrylic resin, a silicone resin or the like can be used as the adhesive.
  • the porosity of the fiber layer 24 is preferably 20 to 90%, more preferably 50 to 90%, from the viewpoint of maintaining the structure of the fiber layer and allowing the sealant to sufficiently pass through.
  • A (25 mm / M) -d (M is the number of meshes in 25 mm)
  • M is the number of meshes in 25 mm
  • the fiber layer 24 has a woven-like form formed by weaving a large number of fibers and a non-woven form formed by intertwining a large number of fibers without weaving.
  • the fiber layer 24 in the present embodiment may be in any form as long as it has a linear expansion coefficient as described above.
  • the woven shape can be selected from the group consisting of, for example, plain weave, twill weave, satin weave, leno weave, imitation twill weave, oblique weave, and double weave.
  • the thickness of the fiber layer 24 is not particularly limited as long as it has the above linear expansion coefficient, but is preferably 0.1 to 2 mm, and more preferably 0.2 to 0.8 mm.
  • the fibers constituting the fiber layer 24 are preferably colored so as to have a color tone similar to that of the solar battery cell 10.
  • the fibers constituting the fiber layer 24 be colored in the blackish color.
  • the fiber is colored with a black pigment.
  • the fiber layer 24 becomes inconspicuous when viewed from the light receiving surface side, and a sense of unity in appearance can be obtained.
  • the fiber layer can be made inconspicuous by being colored in the second encapsulant layer so as to have a color tone similar to that of the solar battery cell.
  • the pigment is colored with a black infrared reflective pigment, the photoelectric conversion efficiency can be improved as described above.
  • the second protective substrate 20 is disposed on the negative direction side of the z-axis of the second sealing material layer 22.
  • the second protective substrate 20 protects the back side of the solar cell module 100 as a back sheet.
  • the material constituting the second protective substrate 20 is glass, fiber reinforced plastic (FRP), polyimide (PI), cyclic polyolefin, polycarbonate (PC), polymethyl methacrylate (PMMA), polyetheretherketone (PEEK), polystyrene At least one selected from the group consisting of (PS), polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) can be used.
  • the fiber reinforced plastic examples include glass fiber reinforced plastic (GFRP), carbon fiber reinforced plastic (CFRP), aramid fiber reinforced plastic (AFRP) and the like.
  • glass epoxy etc. are mentioned as a glass fiber reinforced plastic (GFRP).
  • the material forming the second protective substrate 20 preferably contains at least one selected from the group consisting of fiber reinforced plastic (FRP), polymethyl methacrylate (PMMA) and polyetheretherketone (PEEK).
  • the second protective substrate 20 is preferably made of a fiber-reinforced resin such as fiber-reinforced plastic in order to sufficiently secure its strength.
  • the fiber reinforced plastic may be a UD (UniDirection) material in which fibers are aligned in one direction, or may be a woven material woven by intersecting fibers.
  • a UD material is used for the second protective substrate 20
  • the second protective substrate 20 is preferably formed of a carbon fiber reinforced plastic because it is not easily deformed and is lightweight.
  • this layer may contain titanium oxide or the like to improve the reflectance.
  • the surface may be plated.
  • the thickness of the second protective substrate 20 is not particularly limited, but is preferably 0.01 mm or more and 10 mm or less, more preferably 0.05 mm or more and 5.0 mm or less, and preferably 0.07 mm or more and 1.0 mm or less. It is further preferred that In particular, in the case of a fiber reinforced plastic, the diameter of one fiber is preferably the lower limit value of the thickness.
  • the thickness of the second protective substrate 20 is thin (for example, 0.2 mm or less), in addition to the reduction in weight and thickness, the influence of thermal contraction when the temperature difference occurs in the second protective substrate 20 is reduced. The rigidity of the second protective substrate 20 is reduced. Therefore, the warpage of the entire solar cell module 100 can be reduced.
  • the gas escape property inside a solar cell module can be improved.
  • EVA is used as the material of the second sealing material layer 22
  • acetic acid may be generated due to the decomposition of EVA, but if the second protective substrate 20 is thin, acetic acid is likely to be emitted to the outside.
  • the desired location is reinforced by partially overlapping the UD material as necessary.
  • the characteristics of the second protective substrate 20 can be made strong and weak.
  • fibers of the UD material may be overlapped in the same direction or fibers of the UD material may be overlapped in different directions such as perpendicular, depending on desired characteristics.
  • the second protective substrate 20 when the thickness of the second protective substrate 20 is reduced, the second protective substrate 20 can be bonded while following the shape of the second sealing material layer 22 (surface to be bonded). It is possible to make it difficult to mix air bubbles between the second protective substrate 22 and the second protective substrate 20. Also, for example, even if the first protective substrate 28 has a curved surface, the second protective substrate 20 is bonded to fit the shape of the first protective substrate 28 via the first sealing material layer 26. it can. Therefore, it is possible to easily manufacture the solar cell module 100 having a curved surface shape while suppressing the mixture of air bubbles.
  • the film module is manufactured in a state where the second protective substrate 20 and the second sealing material layer 22 are bonded to each other, the film module itself has flexibility, so the first protective substrate 28 is formed. It can be made easy to attach to.
  • the second protective substrate 20 has high followability, it is difficult to apply a local load to the solar cell 10 or the like, for example, when the curved surface type solar cell module 100 is manufactured by laminating the layers. Damage to the battery cell 10 can be suppressed.
  • the second sealing material layer 22 can be quickly heated and crosslinked, so that not only the manufacturing time of the solar cell module 100 is shortened but also the first protection Thermal deformation of the substrate 28 can be suppressed.
  • the fiber layer 24 is disposed on the back surface side of the photoelectric conversion unit, but in addition to that, the fiber layer may be disposed on the light receiving surface side of the photoelectric conversion unit.
  • the fiber layer disposed on the light receiving surface side of the photoelectric conversion unit is preferably disposed so as not to overlap with the solar battery cell 10 when viewed from the light receiving surface side. That is, the solar cell module of the present embodiment preferably further includes a fiber layer disposed so as to surround the periphery of the solar cell on the light receiving surface side of the photoelectric conversion unit.
  • the fiber layer 32 is disposed so as to surround the periphery of the solar battery cell 10.
  • the fiber layer is a fiber layer disposed along the gap between adjacent solar cells 10 and across the gap.
  • the fiber layer 34 is distribute
  • the solar cell module of the present embodiment further includes a flexible film between at least one of the first protective substrate and the first encapsulant layer, and between the second encapsulant layer and the second protective substrate. It is preferable to have In FIG. 6, the flexible films 38 and 36 are formed on both the first protective substrate 28 and the first sealing material layer 26 and between the second sealing material layer 22 and the second protective substrate 20. The form provided is shown. Such a solar cell module is manufactured via an intermediate product of the solar cell module described later. Therefore, the thermal deterioration of the first protective substrate 28 and the second protective substrate 20 is reduced. The reason will be described later.
  • the flexible film can be made of a flexible transparent resin film, and specific examples thereof include polyester, nylon, polyimide, PEEK and the like. It is preferable to use one having a heat resistant temperature higher than that of the first protective substrate 28 and the second protective substrate 20.
  • the thickness of the flexible film is preferably 10 to 500 ⁇ m, and more preferably 10 to 50 ⁇ m, in order to secure sufficient flexibility.
  • the intermediate product of the solar cell module according to the present embodiment includes a first sealing material layer, a photoelectric conversion unit, and a second sealing material layer sequentially, and between the photoelectric conversion unit and the second sealing material layer.
  • the laminated body in which the fiber layer is disposed is provided in the state of being in contact with the photoelectric conversion portion, or in the state of being buried in the second sealing material layer.
  • the laminated body in which the fiber layer is disposed is provided.
  • it has a flexible film stuck on the at least one surface of a laminated body.
  • the linear expansion coefficient of a fiber layer is smaller than the linear expansion coefficient of a 1st sealing material layer and a 2nd sealing material layer.
  • the intermediate product of the solar cell module of the present embodiment corresponds to the solar cell module of the embodiment shown in FIG. 6 described above, in which the first protective substrate 28 and the second protective substrate 20 are not provided. It has the layer structure shown to.
  • the intermediate product of the solar cell module of the present embodiment is in a state in which the photoelectric conversion unit sealed in the first sealing material layer 26 and the second sealing material layer 22 is protected by the flexible films 36, 38. Since the intermediate product is flexible, it can be freely bent. Furthermore, even when the installation surface of the solar cell module is a curved surface, the intermediate product can be easily processed so as to follow the curved surface. In addition, the intermediate product can be manufactured by a general planar laminator, and has an advantage that the introduction of a special curved laminator is not necessary.
  • the manufacturing method of the solar cell module 100 of the form shown in FIG. 6, ie, the solar cell module which has the flexible films 36 and 38, is shown.
  • the solar battery cell 10 to which the tab wiring 12 is connected is sandwiched between the first sealing material layer 26 and the fiber layer 24 and the second sealing material layer 22, and the flexible films 36 and 38 are disposed on the outside thereof Do.
  • the laminate obtained in this manner is heated to, for example, about 160 ° C. in a vacuum state. Thereafter, heating is continued while pressing the respective constituent members to the heater side under atmospheric pressure to crosslink the resin components of the first and second sealing material layers. As a result, the layers are bonded to obtain an intermediate product of the solar cell (FIG. 7 (a)).
  • the second protective substrate 20 and the first protective substrate 28 are disposed on the outside of the obtained intermediate product via an adhesive, an adhesive, a hot melt adhesive (for example, EVA), and the vacuum state is lower than the above temperature.
  • the two protective substrates are bonded by heating at a temperature (eg, 100 ° C.).
  • a temperature eg, 100 ° C.
  • the respective layers are adhered to obtain the solar cell module 100 (FIG. 7B).
  • polycarbonate heat resistant temperature: 120 to 130 ° C.
  • the mobile unit of the present embodiment is a mobile unit equipped with the solar cell module of the above-described present embodiment.
  • vehicles such as a motor vehicle, a train, or a ship etc. are mentioned, for example.
  • the solar cell module of the present embodiment is mounted on a car, it is preferable to be installed on the upper surface portion of the car body such as a bonnet or a roof.
  • the current obtained by the power generation by the solar cell module of the present embodiment is supplied to an electric device such as a fan or a motor and used for driving and controlling the electric device.
  • Example 1 A first protective substrate of 1 mm thickness, a first sealing material layer of 1 mm thickness, a photoelectric conversion part, a fiber layer of 0.035 mm thickness, a second sealing material layer of 0.6 mm thickness, a second protective substrate of 2 mm thickness
  • the solar cell module was produced by laminating in order from the top and compressing and heating while reducing the pressure at 145 ° C.
  • the first protective substrate was made of polycarbonate (linear expansion coefficient: 5.6 ⁇ 10 ⁇ 5 K ⁇ 1 ).
  • the first sealing material layer used gel.
  • the photoelectric conversion unit used a solar battery cell.
  • IPC 106 thickness 0.035 mm, mesh number 56, linear expansion coefficient 5.5 ⁇ 10 ⁇ 6 K ⁇ 1 ) manufactured by Nitto Boseki Co., Ltd. was used.
  • An ethylene-vinyl acetate copolymer (EVA) (linear expansion coefficient 300 ⁇ 10 ⁇ 6 K ⁇ 1 ) was used for the second encapsulant layer.
  • a carbon fiber reinforced plastic (CFRP) was used for the second protective substrate.
  • disconnected by 25 cycles was evaluated as x.
  • the temperature change rate between the lower limit and the upper limit is about 1.4 ° C / hour
  • the holding time of the lower limit temperature is 60 minutes
  • the holding time of the upper limit temperature is 1 hour 20 minutes
  • the time of 1 cycle is 5 hours 20 Minutes.
  • the temperature cycle test was performed at least three times.
  • Example 2 A solar cell module is prepared in the same manner as in Example 1 except that the fiber layer is replaced with IPC 1501 (thickness 0.14 mm, mesh number 45, linear expansion coefficient 5.5 ⁇ 10 -6 K -1 ) manufactured by Nitto Boseki Co., Ltd. Were evaluated. The results are shown in Table 1.
  • Example 3 A solar cell module is manufactured in the same manner as in Example 1 except that the fiber layer is changed to IPC 7628 (thickness 0.18 mm, mesh number 44, linear expansion 5.5 ⁇ 10 -6 K -1 ) manufactured by Nitto Boseki Co., Ltd. It produced and evaluated. The results are shown in Table 1.
  • Comparative Example 1 A solar cell module was produced and evaluated in the same manner as in Example 1 except that the fiber layer was not laminated. The results are shown in Table 1.
  • the first protective substrate 28 may be made of glass.
  • the present embodiment it is possible to provide a solar cell module and an intermediate product of the solar cell module in which breakage of the solar cell and breakage of the tab wiring are less likely to occur in the photoelectric conversion unit even when temperature change occurs. it can.

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  • Photovoltaic Devices (AREA)

Abstract

La présente invention concerne un module de cellule solaire comportant : un premier substrat de protection constitué d'une résine ; une première couche de matériau de scellement ; une partie de conversion photoélectrique ; une seconde couche de matériau de scellement ; et un second substrat de protection, successivement à partir du côté surface de réception de lumière. Selon l'invention, une couche de fibres est disposée entre la partie de conversion photoélectrique et la seconde couche de matériau de scellement de façon à se trouver en contact avec la partie de conversion photoélectrique ou à être incorporée dans la seconde couche de matériau de scellement, et le coefficient de dilatation linéaire de la couche de fibres est inférieur à ceux de la première couche de matériau de scellement et de la seconde couche de matériau de scellement.
PCT/JP2018/029014 2017-08-08 2018-08-02 Module de cellule solaire et produit intermédiaire de module de cellule solaire Ceased WO2019031378A1 (fr)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
JP2022087357A (ja) * 2021-09-29 2022-06-10 シャープ株式会社 太陽電池モジュール
US11843066B2 (en) * 2019-08-08 2023-12-12 Toyota Jidosha Kabushiki Kaisha Decorated photovoltaic cell module

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JP2011210861A (ja) * 2010-03-29 2011-10-20 Kyocera Corp 太陽電池モジュール
US20110308578A1 (en) * 2011-05-04 2011-12-22 Jongkyoung Hong Solar cell module and method for manufacturing the same
JP2013229576A (ja) * 2012-03-26 2013-11-07 Mitsubishi Chemicals Corp 太陽電池モジュール及び車輌用部材
WO2014132516A1 (fr) * 2013-02-26 2014-09-04 三洋電機株式会社 Cellule solaire, module de cellule solaire et procédé de fabrication de cellule solaire
JP2014179536A (ja) * 2013-03-15 2014-09-25 Mitsubishi Chemicals Corp ロールスクリーン及びロールスクリーン装置
JP2015135914A (ja) * 2014-01-17 2015-07-27 三菱化学株式会社 太陽電池モジュール一体型膜材
WO2015114983A1 (fr) * 2014-01-29 2015-08-06 株式会社クレハ Composition de résine à base de fluor, film de résine, stratifié et feuille de support pour modules de cellules solaires
JP2015537391A (ja) * 2012-12-18 2015-12-24 ダウ グローバル テクノロジーズ エルエルシー 補強ｐｖ積層体

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JP2000244000A (ja) * 1999-02-24 2000-09-08 Canon Inc 太陽電池モジュール、太陽電池付き屋根及び発電装置
JP2005050927A (ja) * 2003-07-30 2005-02-24 Kyocera Corp 太陽電池モジュールおよびその製造方法ならびに太陽電池モジュールの設置構造
JP2009188124A (ja) * 2008-02-05 2009-08-20 Toyota Motor Corp 太陽電池モジュール
JP2011210861A (ja) * 2010-03-29 2011-10-20 Kyocera Corp 太陽電池モジュール
US20110308578A1 (en) * 2011-05-04 2011-12-22 Jongkyoung Hong Solar cell module and method for manufacturing the same
JP2013229576A (ja) * 2012-03-26 2013-11-07 Mitsubishi Chemicals Corp 太陽電池モジュール及び車輌用部材
JP2015537391A (ja) * 2012-12-18 2015-12-24 ダウ グローバル テクノロジーズ エルエルシー 補強ｐｖ積層体
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JP2014179536A (ja) * 2013-03-15 2014-09-25 Mitsubishi Chemicals Corp ロールスクリーン及びロールスクリーン装置
JP2015135914A (ja) * 2014-01-17 2015-07-27 三菱化学株式会社 太陽電池モジュール一体型膜材
WO2015114983A1 (fr) * 2014-01-29 2015-08-06 株式会社クレハ Composition de résine à base de fluor, film de résine, stratifié et feuille de support pour modules de cellules solaires

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11843066B2 (en) * 2019-08-08 2023-12-12 Toyota Jidosha Kabushiki Kaisha Decorated photovoltaic cell module
JP2022087357A (ja) * 2021-09-29 2022-06-10 シャープ株式会社 太陽電池モジュール
JP7734035B2 (ja) 2021-09-29 2025-09-04 シャープ株式会社 太陽電池モジュール

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