WO2019087801A1 - Module de cellules solaires - Google Patents

Module de cellules solaires Download PDF

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Publication number
WO2019087801A1
WO2019087801A1 PCT/JP2018/038859 JP2018038859W WO2019087801A1 WO 2019087801 A1 WO2019087801 A1 WO 2019087801A1 JP 2018038859 W JP2018038859 W JP 2018038859W WO 2019087801 A1 WO2019087801 A1 WO 2019087801A1
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WO
WIPO (PCT)
Prior art keywords
solar cell
protective layer
surface protective
layer
back surface
Prior art date
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PCT/JP2018/038859
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English (en)
Japanese (ja)
Inventor
剛士 植田
直樹 栗副
元彦 杉山
善光 生駒
Original Assignee
パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2019087801A1 publication Critical patent/WO2019087801A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • 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.
  • the present invention relates to a solar cell module comprising a plurality of solar cells.
  • a solar cell module is generally formed of a plurality of solar cells, a sealing layer sealing the plurality of solar cells, and a surface layer and a back layer respectively disposed on both sides of the sealing layer. Moreover, in a solar cell module, in order to obtain a fixed output, several solar cells are arrange
  • the solar cell module described in Patent Document 1 is disposed on the sealing layer formed by sealing the solar cell with a sealing material, and the side of the sealing layer on which sunlight is incident, and the resin is It is disclosed to have a structured surface layer. Moreover, it is disclosed that the solar cell module of patent document 1 has a back layer arrange
  • the solar cell module is designed so as not to leak as much as possible to the surface layer or the back layer, from the viewpoint of improving the reliability of the solar cell module It is preferable from In particular, when the surface layer is formed of a resin, the permeability to oxygen, moisture, ions and the like is higher than that of glass, and thus a solar cell module having high reliability is desired.
  • 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 a solar cell module with high reliability as compared with the conventional solar cell module.
  • the solar cell module which concerns on the 1st aspect of this invention is equipped with the surface protective layer formed by resin, and a back surface protective layer.
  • the solar cell module includes at least one solar cell string composite disposed between the front surface protective layer and the rear surface protective layer and including a solar cell string, a sealing portion, and a film layer.
  • the solar cell string includes a plurality of solar cells and a connection member electrically connecting the solar cells to each other.
  • the sealing portion seals the solar cell string.
  • the film layer is disposed between the surface protective layer and the sealing portion and / or between the back surface protective layer and the sealing portion.
  • a film layer is arrange
  • a solar cell module comprises a surface protective layer and a back surface protective layer.
  • the solar cell module includes at least one solar cell string composite disposed between the front surface protective layer and the rear surface protective layer and including a solar cell string, a sealing portion, and a film layer.
  • the solar cell string includes a plurality of solar cells and a connection member electrically connecting the solar cells to each other.
  • the sealing portion seals the solar cell string.
  • the film layer is disposed between the surface protective layer and the sealing portion and / or between the back surface protective layer and the sealing portion.
  • a film layer is arrange
  • FIG. 1 is a plan view showing an example of a solar cell module according to the present embodiment.
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG.
  • FIG. 3 is a cross-sectional view taken along the line BB in FIG.
  • FIG. 4 is a perspective view of the solar battery cell string composite in FIG. 3.
  • FIG. 5 is a cross-sectional view showing another example of the solar cell module according to the present embodiment.
  • a light source side such as sunlight is referred to as a light receiving surface side and a surface side
  • a side opposite to the light receiving surface is referred to as a back surface side.
  • the solar cell module 100 As shown in FIGS. 1 to 3, the solar cell module 100 according to the present embodiment includes a surface protective layer 10, a back surface protective layer 20, and at least one solar cell string composite 30. And as shown in FIG. 4, the solar cell string composite 30 contains the solar cell string 31, the sealing part 32, and the film layer 33. As shown in FIG. Each component will be described in detail below.
  • the surface protective layer 10 can be disposed on the light receiving surface side with respect to the solar battery cell string composite 30.
  • the surface protective layer 10 has a role of protecting the surface of the solar cell module 100 from external impact and the like.
  • the shape of the surface protective layer 10 is not particularly limited, and may be a polygon such as a circle, an ellipse, or a rectangle depending on the application.
  • the cross-sectional shape of the surface protective layer 10 may be rectangular or may be curved in the stacking direction (z-axis direction) of each layer of the solar cell module 100.
  • the material for forming the surface protective layer 10 is not particularly limited.
  • polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and polyethylene naphthalate (PEN), polycarbonate (PC), amorphous polyarylate, polyacetal Resins such as (POM), polyether ketone (PEK), polyether ether ketone (PEEK), polyether sulfone, modified polyphenylene ether, and glass can be used.
  • the surface protective layer 10 is preferably made of a resin.
  • the material for forming the surface protective layer 10 is preferably polycarbonate (PC) from the viewpoint of impact resistance and light transmittance.
  • the surface protective layer 10 preferably has a light transmitting property.
  • the total light transmittance of the surface protective layer 10 is preferably 80% to 100%, and more preferably 85% to 100%. By setting the total light transmittance of the surface protective layer 10 in such a range, light can efficiently reach the solar battery cell 31a.
  • the total light transmittance can be determined, for example, by the method of Japanese Industrial Standard JIS K7361-1: 1997 (ISO 13468-1: 1996) (Plastic-Test method of total light transmittance of transparent materials-Part 1: Single beam method) It can be measured.
  • the thickness of the surface protective layer 10 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 mm to 100 mm, and more preferably 0.5 mm to 50 mm. By setting the thickness of the surface protective layer 10 in such a range, the solar cell module 100 can be appropriately protected, and light can efficiently reach the solar cell 31a described later.
  • the solar cell module 100 includes the back surface protective layer 20.
  • the back surface protective layer 20 can protect the back surface side of the solar cell module 100.
  • the back surface protective layer 20 can be disposed on the opposite side to the light receiving surface side of the solar cell module 100.
  • the back surface protective layer 20 can be disposed on the installation surface side such as a roof.
  • the material for forming the back surface protective layer 20 is not particularly limited.
  • inorganic materials such as glass, metal materials such as aluminum, and polyimide (PI), cyclic polyolefin, polycarbonate (PC), polymethyl methacrylate (PMMA), Using at least one material selected from the group consisting of resin materials such as polyetheretherketone (PEEK), polystyrene (PS), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and fiber reinforced plastic (FRP) Can.
  • resin materials such as polyetheretherketone (PEEK), polystyrene (PS), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and fiber reinforced plastic (FRP) Can.
  • fiber reinforced plastic (FRP) include glass fiber reinforced plastic (GFRP), carbon fiber reinforced plastic (CFRP), aramid fiber reinforced plastic (AFRP), and cellulose fiber reinforced plastic. Glass epoxy etc. are mentioned as a glass fiber reinforced plastic (GFRP).
  • 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 back surface protective layer 20
  • the back surface protective layer 20 is formed of a carbon fiber reinforced plastic because it is not easily bent and is lightweight.
  • the back surface protective layer 20 is preferably at least one selected from the group consisting of a honeycomb structure, a foam and a porous body.
  • the solar cell module 100 can be reduced in weight while maintaining the rigidity of the solar cell module 100.
  • the honeycomb structure is preferably formed of at least one of aluminum and cellulose fiber reinforced plastic.
  • at least one of the foam and the porous body is formed of a resin material such as polyurethane, polyolefin, polyester, polyamide, or polyether.
  • the thickness of the back surface protective layer 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 is 0.07 mm or more and 1.0 mm or less Is more preferred.
  • the diameter of one fiber is preferably the lower limit value of the thickness.
  • the thickness of the back surface protective layer 20 is thin (for example, 0.2 mm or less), the following effects can be expected in addition to the reduction in weight and thickness. That is, it is possible to reduce the warpage of the entire solar cell module 100 due to the reduction in the influence of thermal contraction when the temperature difference occurs in the back surface protective layer 20 and the decrease in the rigidity of the back surface protective layer 20. . In addition, even when, for example, ethylene-vinyl acetate copolymer (EVA) is used for the sealing portion 32, free acetic acid causing corrosion is easily discharged to the outside of the solar cell module 100 through the back surface protective layer 20. Become.
  • EVA ethylene-vinyl acetate copolymer
  • fiber reinforced plastic of UD material for the back surface protective layer 20 and reducing the thickness of the back surface protective layer 20
  • partially overlapping the UD material as needed reinforces the desired location, etc. It is possible to make the characteristics of the back surface protective layer 20 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 back surface protective layer 20 When the thickness of the back surface protective layer 20 is reduced, the back surface protective layer 20 can be bonded while following the shape of the solar battery cell string composite 30 (surface to be bonded), and the solar battery cell string composite 30 and the back surface protection It is possible to make it difficult to mix air bubbles between the layers 20.
  • the back surface protective layer 20 can be bonded so as to conform to the shape of the surface protective layer 10 via the solar cell cell string composite 30. 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 back surface protective layer 20 and the solar cell cell string composite 30 are bonded to each other, the film module itself has flexibility, so bonding to the surface protective layer 10 The fit can be made easy.
  • the followability of the back surface protective layer 20 is high, for example, when manufacturing the solar cell module 100 having a curved surface shape by laminating the respective layers, it is difficult for a local load to be applied to the solar cells 31a etc. Damage to the cell 31a can be suppressed.
  • the solar cell cell string composite 30 can be quickly heated and crosslinked, so that not only the manufacturing time of the solar cell module 100 is shortened but also the surface protective layer 10 Can be suppressed from heat deformation.
  • the solar cell module 100 includes a solar cell string composite 30 disposed between the surface protective layer 10 and the back surface protective layer 20. Therefore, the solar cell string composite 30 can be protected from the external impact of the solar cell module 100 by the surface protective layer 10 and the back surface protective layer 20.
  • the solar cell module 100 includes at least one solar cell string complex 30.
  • four solar cell string complexes 30 are arranged side by side along the x-axis direction in the xy plane.
  • the number of the solar cell cell string composites 30 included in the solar cell module 100 is not particularly limited, and may be at least one or more.
  • the solar cell module 100 preferably includes two or more solar cell cell string complexes 30, and includes three or more solar cell cell string complexes 30. Is more preferred.
  • the solar cell string composite 30 includes a solar cell string 31, a sealing portion 32 and a film layer 33.
  • a single solar battery cell string 31 forms a solar battery cell string composite 30.
  • the solar cell string 31 is sealed so as to be surrounded by the sealing portion 32, and the sealing portion 32 is disposed so as to be covered by the film layer 33.
  • the solar cell string 31 includes a plurality of solar cells 31 a and a connection member 31 b that electrically connects the solar cells 31 a to each other. Specifically, the light receiving surface side of one solar battery cell 31a and the back surface side of the other solar battery cell 31a are electrically connected to each other by the connection member 31b. In the present embodiment, as shown in FIG. 1 and FIG. 2, five solar battery cells 31 a arranged side by side along the y-axis direction are electrically connected in series by the connection member 31 b, and one solar cell A battery cell string 31 is formed.
  • the number of solar cell string 31 included in the solar cell string composite 30 may be plural, such as two or three.
  • the solar cell string complex 30 may include the solar cell strings 31 arranged in a plurality of lines such as two lines or three lines.
  • the solar battery cell string composite 30 includes one solar battery cell string 31 arranged in one row.
  • the solar battery cell 31a is an element that converts light energy into electrical energy.
  • a solar cell 31a a silicon type solar cell, a compound type solar cell, an organic type solar cell etc. are mentioned, for example.
  • a silicon system solar cell a monocrystal silicon system solar cell, a polycrystalline silicon system solar cell, a microcrystalline silicon system solar cell, an amorphous silicon system solar cell etc. are mentioned.
  • compound solar cells include GaAs solar cells, CIS solar cells, CIGS solar cells, and CdTe solar cells.
  • an organic type solar cell a dye-sensitized solar cell, an organic thin film solar cell, etc. are mentioned.
  • a heterojunction solar cell or a multijunction solar cell can also be used as the solar battery cell 31a.
  • a finger electrode (not shown) can be disposed on the light receiving surface side and the back surface side of the solar battery cell 31a.
  • the finger electrode is formed by arranging a plurality of metal wires substantially in parallel.
  • the finger electrodes can have, for example, a height of 10 ⁇ m to 30 ⁇ m and a width of 100 ⁇ m to 500 ⁇ m.
  • the finger electrode collects a current generated by light such as sunlight from the solar battery cell 31a and supplies the current to a bus bar electrode (not shown).
  • the bus bar electrodes are generally formed by two to three metal wires, and are disposed to intersect the finger electrodes substantially perpendicularly. Although the bus bar electrodes are not particularly limited, the height can be 10 ⁇ m to 30 ⁇ m, and the width can be 100 ⁇ m to 500 ⁇ m. The bus bar electrodes can supply the current collected from the finger electrodes to the connection member 31 b.
  • the connecting member 31 b is an interconnector that electrically connects the bus bar electrode provided on the light receiving surface side of one solar battery cell 31 a and the bus bar electrode provided on the back surface side of the other solar battery cell 31 a. can do. Resin or solder can be used for connection between the connection member 31 b and the bus bar electrode. This resin may be either conductive or nonconductive. In the case of the nonconductive resin, the connection member 31b and the bus bar electrode are electrically connected by being directly connected.
  • the connection member 31 b is not particularly limited as long as it can electrically connect the solar battery cells 31 a to each other, and can be formed of, for example, an elongated foil-like metal base.
  • the material for forming the metal base is not particularly limited, and metals such as gold, silver, copper, platinum, aluminum and nickel can be used. Among these, from the viewpoint of processability, durability and economy, the material forming the metal base is preferably copper.
  • the width of the metal base is preferably 0.5 mm to 10 mm, and more preferably 1 mm to 3 mm.
  • the thickness of the metal base is preferably 0.01 mm to 3.0 mm, and more preferably 0.05 mm to 1.0 mm.
  • connection member 31c Each solar cell string complex 30 can be electrically connected to each other by a connection member 31c.
  • connection members 31 b connected to both ends of the solar cell string 31 in each solar cell string composite 30 are electrically connected by a connection member 31 c.
  • the connection member 31 c is not sealed by the sealing portion 32 but disposed between the surface protective layer 10 and the back surface protective layer 20, but the connection member 31 c is sealed by the sealing portion 32.
  • the material for forming the connection member 31c is not particularly limited, and metals such as gold, silver, copper, platinum, aluminum, and nickel can be used.
  • the solar cell string composite 30 includes the sealing portion 32.
  • the sealing portion 32 seals the solar cell string 31.
  • the sealing portion 32 has a role of protecting the solar cell string 31 from external impact or the like.
  • the shape of the sealing portion 32 is not particularly limited as in the case of the surface protective layer 10, and may be a polygon such as a circle, an ellipse, or a rectangle depending on the application. Further, similarly to the surface protective layer 10, the cross-sectional shape of the sealing portion 32 may be rectangular or may be curved in the stacking direction (z-axis direction) of each layer of the solar cell module 100.
  • the material which forms the sealing part 32 is not specifically limited, For example, ethylene-vinyl acetate copolymer (EVA), polyvinyl butyral (PVB), polyethylene terephthalate (PET), polyolefin (PO), polyimide (PI) etc.
  • EVA ethylene-vinyl acetate copolymer
  • PVB polyvinyl butyral
  • PET polyethylene terephthalate
  • PO polyolefin
  • PI polyimide
  • At least one selected from the group consisting of a thermosetting resin such as a thermoplastic resin, an epoxy resin, a urethane resin, and a polyimide can be used. These resins may be modified resins or may be used in combination.
  • the material forming the surface sealing portion 32a is preferably at least one of ethylene-vinyl acetate copolymer (EVA) and polyolefin (PO).
  • the solar cell string 31 may be disposed in contact with the film layer 33 described later.
  • the sealing portion 32 is the surface sealing portion 32a disposed on the surface protective layer 10 side with respect to the solar battery cells 31a, and the back surface protective layer 20 side with respect to the solar battery cells 31a.
  • positioned at is included. That is, it is preferable that the solar battery cell 31a be disposed so as to be sandwiched between the front surface sealing portion 32a and the rear surface sealing portion 32b.
  • the materials for forming the front surface sealing portion 32a and the rear surface sealing portion 32b may be the same as or different from each other.
  • the surface sealing portion 32 a preferably has a light transmitting property.
  • the total light transmittance of the surface sealing portion 32a is preferably 60% to 100%, and more preferably 70% to 100%. Further, the total light transmittance of the surface sealing portion 32a is more preferably 80% to 100%.
  • the total light transmittance can be measured, for example, by a method such as JIS K7361-1: 1997.
  • the back surface sealing part 32b contains glass fiber. That is, the sealing portion 32 is a front surface sealing portion 32a disposed on the surface protective layer 10 side with respect to the solar battery cells 31a, and a back surface sealing disposed on the back surface protective layer 20 side with respect to the solar battery cells 31a. It is preferable that the back surface sealing part 32b contains glass fiber including the part 32b. When the back surface sealing portion 32 b contains such glass fibers, the rigidity of the solar battery cell string composite 30 is improved, and the solar battery cell string composite 30 can be easily handled as one. Therefore, at the time of manufacturing the solar cell module 100, the handling of the solar cell string complex 30 is facilitated.
  • the solar cell string composite 30 during transportation of the solar cell string composite 30, it is possible to suppress the solar cell 31a from being broken or the connecting member 31b from being bent, and the production efficiency of the solar cell module 100 is improved. be able to. Moreover, since glass generally has insulation, the insulation of the solar cell module 100 can be improved.
  • a glass fiber reinforced plastic which impregnated resin in at least one fiber of a woven fabric and a nonwoven fabric is mentioned, for example.
  • resin used for glass fiber reinforced plastic at least any one of the thermoplastic resin and the thermosetting resin which form the sealing part 32 mentioned above can be used.
  • resin used for glass fiber reinforced plastic it is preferable that it is an epoxy resin.
  • the film layer 33 is included in the solar cell string composite 30.
  • the film layer 33 is disposed between at least one of the surface protective layer 10 and the sealing portion 32 and between the back surface protective layer 20 and the sealing portion 32. From the viewpoint of improving the reliability of the solar cell module 100, the film layer 33 is disposed both between the surface protective layer 10 and the sealing portion 32 and between the back surface protective layer 20 and the sealing portion 32. Is preferred. However, if the film layer 33 is disposed between the surface protective layer 10 and the sealing portion 32 or between the back surface protective layer 20 and the sealing portion 32, the current to the surface protective layer 10 or the back surface protective layer 20 It is possible to suppress the flow. Therefore, the film layer 33 may be disposed between at least one of the surface protective layer 10 and the sealing portion 32 and between the back surface protective layer 20 and the sealing portion 32.
  • the film layer 33 is disposed so that each solar battery cell 31a is accommodated inside when viewed from the stacking direction of the surface protective layer 10 and the back surface protective layer 20 in the direction perpendicular to the connection direction of each solar battery cell 31a. Be done.
  • the stacking direction of the surface protective layer 10 and the back surface protective layer 20 is the direction in which the surface protective layer 10, the solar cell cell string composite 30 and the back surface protective layer 20 are stacked.
  • the connection direction of each solar cell 31a is the long axis direction of the solar cell string 31 formed by the solar cell 31a and the connection member 31b in a line, and corresponds to the y-axis direction in the figure. .
  • the direction perpendicular to the connection direction of the solar cells 31a is the direction perpendicular to the stacking direction of the surface protective layer 10 and the back surface protection layer 20 and the direction perpendicular to the connection direction of the solar cells 31a. , Corresponds to the x-axis direction in the figure.
  • the respective solar cells 31 a forming the solar cell string composite 30 are accommodated so as to be disposed inside the film layer 33. Therefore, the film layer 33 is disposed between at least one of the surface protective layer 10 and the back surface protective layer 20 and the solar cell string 31. In the present embodiment, such an arrangement can suppress the flow of current from the solar cell string 31 to at least one of the surface protective layer 10 and the back surface protective layer 20. Therefore, the reliability of the solar cell module 100 can be improved.
  • the film layer 33 is preferably formed in a continuous cylindrical shape and accommodates the solar battery cell string composite 30.
  • the periphery of the solar cell string 31 can be surrounded by the film layer 33. Therefore, the insulation of the solar cell string 31 and the surface protective layer 10, and the solar cell string 31 and the back surface protective layer 20 can be further improved. Therefore, the reliability of the solar cell module 100 can be further improved.
  • oxygen around the solar cell module 100 enters the sealing portion 32 by surrounding the solar cell string 31 with the film layer 33. Can be suppressed. Therefore, yellowing of the sealing portion 32 can also be suppressed by surrounding the periphery of the solar cell string 31 with the film layer 33.
  • the thickness of the film layer 33 is not particularly limited, but is preferably 10 ⁇ m to 500 ⁇ m. By setting the thickness of the film layer 33 to 10 ⁇ m or more, breakage of the solar battery cell 31 a can be suppressed during transportation or the like. Further, by setting the thickness of the film layer 33 to 500 ⁇ m or less, since the film layer 33 is unlikely to be wrinkled even when the solar cell module 100 is bent and formed, the solar cell module 100 having a high degree of freedom in design is formed. can do.
  • the material which forms the film layer 33 will not be specifically limited if it has insulation. However, from the viewpoint of flexibility and translucency, as a material for forming the film layer 33, it is preferable to use a polyester such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) and a resin such as an acrylic resin.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • acrylic resin acrylic resin
  • the film layer 33 preferably has translucency.
  • the total light transmittance of the film layer 33 is preferably 60% to 100%, and more preferably 70% to 100%.
  • the total light transmittance of the film layer 33 is more preferably 80% to 100%. By setting the total light transmittance of the film layer 33 in this range, light can efficiently reach the solar battery cell 31a.
  • the total light transmittance can be measured, for example, by a method such as JIS K7361-1: 1997.
  • a barrier layer 50 having an oxygen barrier property be formed on the surface of the film layer 33.
  • the sealing portion 32 may turn yellow due to the influence of metal ions derived from the connection member 31 b and oxygen which intrudes from the outside of the solar cell module 100. Therefore, by forming such a barrier layer 50, the amount of oxygen intruding from the outside of the solar cell module 100 can be reduced. Therefore, since the total light transmittance of the sealing part 32 can be improved, the absorption efficiency of the light energy in the solar cell module 100 can be improved.
  • the barrier layer 50 is formed on the surface of the film layer 33 opposite to the sealing portion 32 side. Specifically, the barrier layer 50 is disposed between the surface protective layer 10 and the film layer 33 and between the back surface protective layer 20 and the film layer 33, respectively. However, the barrier layer 50 may be formed on the surface of the film layer 33 on the sealing portion 32 side. Specifically, the barrier layer 50 may be disposed between the sealing portion 32 and the film layer 33.
  • the oxygen permeability of the barrier layer 50 is not particularly limited, but is preferably 1.0 ⁇ 10 ⁇ 5 mol / (m 2 ⁇ s ⁇ Pa) or less. By making the oxygen permeability of the barrier layer 50 equal to or less than the above value, it is possible to suppress yellowing of the sealing portion 32 to such an extent that visual observation is difficult.
  • the oxygen permeability can be measured in accordance with JIS K 7126-2 (Plastics-Films and Sheets-Gas Permeability Test Method-Part 2: Equal Pressure Method). The oxygen permeability can be measured at a measurement temperature of 23 ° C. and a measurement humidity of 90% RH.
  • the barrier layer 50 is preferably formed of a metal such as silicon, aluminum, magnesium, nickel, tin or titanium, and an inorganic material such as an oxide, a nitride or a carbide of the above metal. Among these, at least one of silicon oxide and aluminum oxide is preferable, and silicon oxide is more preferable. These inorganic materials can be formed on at least one surface of the film layer 33 by, for example, physical vapor deposition (PVD) or chemical vapor deposition (CVD).
  • PVD physical vapor deposition
  • CVD chemical vapor deposition
  • the thickness of the barrier layer 50 is not particularly limited, but is preferably 5 nm or more and 800 nm or less. By setting the thickness of the barrier layer 50 to 5 nm or more, the oxygen barrier property can be improved. In addition, by setting the thickness of the barrier layer 50 to 800 nm or less, it is possible to suppress the reduction of the light transmittance, and to suppress the reduction of the light reaching the solar battery cell 31 a by the barrier layer 50. it can.
  • the barrier layer 50 preferably has translucency.
  • the total light transmittance of the barrier layer 50 is preferably 60% to 100%, and more preferably 70% to 100%.
  • the total light transmittance of the barrier layer 50 is more preferably 80% to 100%. By setting the total light transmittance of the barrier layer 50 in this range, light can efficiently reach the solar battery cell 31 a.
  • the total light transmittance can be measured, for example, by a method such as JIS K7361-1: 1997.
  • the adhesive layer 40 bonds the surface protective layer 10 and the film layer 33, and / or the back surface protective layer 20 and the film layer 33. That is, the film layer 33 and at least one of the surface protective layer 10 and the back surface protective layer 20 are adhered by the adhesive layer 40.
  • the adhesive layer 40 is formed by solidifying an adhesive capable of adhering the surface protective layer 10 or the back surface protective layer 20 to the film layer 33.
  • the adhesive for forming the adhesive layer 40 is not particularly limited, but a hot melt adhesive, a moisture-curable adhesive, and the like are preferable. Since these adhesives can be cured in one solution and can be cured at normal temperature, the production efficiency of the solar cell module 100 can be improved.
  • a hot melt adhesive is an adhesive that cures by being melted by heat and then cooled.
  • a hot melt adhesive for example, polyethylene (PE), polypropylene (PP), polybutene (PB), ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl acrylate copolymer (EMA), ethylene- Polyolefin adhesives such as methacrylic acid copolymer (EMAA) can be used.
  • a moisture-curable adhesive is an adhesive that cures by reacting with moisture such as in air.
  • a moisture curing adhesive a urethane resin adhesive, a silicone resin adhesive, a cyanoacrylate resin adhesive or the like can be used.
  • the solar cell module 100 may include a frame (not shown).
  • the frame supports the peripheral edge of the solar cell module 100 and is used when installing the solar cell module 100 on a roof or the like.
  • the material for forming the frame is not particularly limited, but is preferably made of aluminum from the viewpoint of strength and weight reduction.
  • the solar cell module 100 of the present embodiment can be mounted on the roof or the like of a building or a vehicle including a car. At this time, the shape of the solar cell module 100 may have a curved surface so as to conform to the shape of the roof.
  • the solar cell module 100 is also suitable for a solar cell module 100 having a curved shape.
  • the solar cell module 100 includes the surface protective layer 10 formed of a resin and the back surface protective layer 20. Also, the solar cell module 100 is disposed between the surface protective layer 10 and the back surface protective layer 20, and includes at least one solar cell string composite including the solar cell string 31, the sealing portion 32, and the film layer 33. And a body 30.
  • the solar cell string 31 includes a plurality of solar cells 31 a and a connection member 31 b electrically connecting the solar cells 31 a to each other.
  • the sealing portion 32 seals the solar cell string 31.
  • the film layer 33 is disposed between at least one of the surface protective layer 10 and the sealing portion 32 and between the back surface protective layer 20 and the sealing portion 32.
  • the film layer 33 is such that each solar battery cell 31a is accommodated inside as viewed from the stacking direction of the surface protective layer 10 and the back surface protective layer 20 in the direction perpendicular to the connection direction of each solar battery cell 31a. Will be placed. Furthermore, the film layer 33 and at least one of the surface protective layer 10 and the back surface protective layer 20 are adhered by the adhesive layer 40.
  • the solar cell module 100 includes the surface protective layer 10 and the back surface protective layer 20. Also, the solar cell module 100 is disposed between the surface protective layer 10 and the back surface protective layer 20, and includes at least one solar cell string composite including the solar cell string 31, the sealing portion 32, and the film layer 33. And a body 30.
  • the solar cell string 31 includes a plurality of solar cells 31 a and a connection member 31 b electrically connecting the solar cells 31 a to each other.
  • the sealing portion 32 seals the solar cell string 31.
  • the film layer 33 is disposed between at least one of the surface protective layer 10 and the sealing portion 32 and between the back surface protective layer 20 and the sealing portion 32.
  • the film layer 33 is such that each solar battery cell 31a is accommodated inside as viewed from the stacking direction of the surface protective layer 10 and the back surface protective layer 20 in the direction perpendicular to the connection direction of each solar battery cell 31a. Will be placed. Furthermore, the film layer 33 and at least one of the surface protective layer 10 and the back surface protective layer 20 are adhered by the adhesive layer 40.
  • the film layer 33 is disposed between at least one of the surface protective layer 10 and the back surface protective layer 20 and the solar cell string 31. Thereby, the flow of current from the solar cell string 31 to at least one of the surface protective layer 10 and the back surface protective layer 20 can be suppressed. Therefore, the solar cell module 100 can be provided with higher reliability as compared to the conventional solar cell module.
  • the solar cell module 100 can be formed by sequentially stacking, from the top, the surface protective layer 10, the at least one solar cell cell string composite 30, the back surface protective layer 20, and the like, and compressing while heating.
  • the solar cell string composite 30 including the solar cell string 31, the sealing portion 32, and the film layer 33 is one unit, and at least one solar cell string composite 30 has the surface protective layer 10 And the back surface protective layer 20. That is, the solar cell string 31 including the plurality of solar cells 31 a can be fixed by being sealed by the sealing portion 32, and the solar cell string composite 30 can be handled integrally. Therefore, at the time of transportation, the solar battery cell 31a is bent and damaged, or the connection member 31b is not easily bent. In addition, since the solar cell string complex 30 can be carried as one unit and can be transported in a state in which the solar cell cell string 31 is fixed, handling of the solar cell cell string 31 becomes easy and manufacturing loss is also reduced. Can.
  • heating conditions are not particularly limited, for example, heating to about 150 ° C. may be performed in a vacuum state. Heating under vacuum conditions is preferable because the defoaming property is further improved. Moreover, a frame etc. can also be attached to the laminated body obtained by heating.

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne un module de cellules solaires (100) comprenant au moins un complexe de chaîne de cellules de batterie solaire (30) comprenant : une chaîne de cellules de batterie solaire (31) ; une partie d'étanchéité (32), et une couche de film (33). La couche de film (33) est disposée entre une couche de protection de surface avant (10) et la partie d'étanchéité (32) et/ou entre une couche de protection de surface arrière (20) et la partie d'étanchéité (32). La couche de film (33) est disposée de telle sorte que, lorsqu'elle est vue dans la direction d'empilement de la couche de protection de surface avant (10) et de la couche de protection de surface arrière (20), des cellules de batterie solaire (31a) sont logées au niveau du côté interne dans une direction perpendiculaire à une direction dans laquelle des cellules de batterie solaire (31a) sont connectées. En outre, la couche de film (33) et au moins l'une de la couche de protection de surface avant (10) et de la couche de protection de surface arrière (20) sont liées ensemble par une couche adhésive (40).
PCT/JP2018/038859 2017-10-30 2018-10-18 Module de cellules solaires WO2019087801A1 (fr)

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JP2017-209011 2017-10-30
JP2017209011 2017-10-30

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WO2019087801A1 true WO2019087801A1 (fr) 2019-05-09

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0969646A (ja) * 1995-05-08 1997-03-11 Bridgestone Corp 太陽電池モジュール
JP2006120972A (ja) * 2004-10-25 2006-05-11 Toppan Printing Co Ltd 太陽電池用表面保護シート及び太陽電池モジュール
JP2013145807A (ja) * 2012-01-13 2013-07-25 Keiwa Inc 太陽電池モジュール用フロントシート及びこれを用いた太陽電池モジュール
WO2016022611A1 (fr) * 2014-08-04 2016-02-11 Solexel, Inc. Modules photovoltaïques résistants aux chocs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0969646A (ja) * 1995-05-08 1997-03-11 Bridgestone Corp 太陽電池モジュール
JP2006120972A (ja) * 2004-10-25 2006-05-11 Toppan Printing Co Ltd 太陽電池用表面保護シート及び太陽電池モジュール
JP2013145807A (ja) * 2012-01-13 2013-07-25 Keiwa Inc 太陽電池モジュール用フロントシート及びこれを用いた太陽電池モジュール
WO2016022611A1 (fr) * 2014-08-04 2016-02-11 Solexel, Inc. Modules photovoltaïques résistants aux chocs

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