WO2019208238A1 - Module de cellule solaire - Google Patents

Module de cellule solaire Download PDF

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Publication number
WO2019208238A1
WO2019208238A1 PCT/JP2019/015770 JP2019015770W WO2019208238A1 WO 2019208238 A1 WO2019208238 A1 WO 2019208238A1 JP 2019015770 W JP2019015770 W JP 2019015770W WO 2019208238 A1 WO2019208238 A1 WO 2019208238A1
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WO
WIPO (PCT)
Prior art keywords
solar cell
cell module
glass plate
sealing member
region
Prior art date
Application number
PCT/JP2019/015770
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English (en)
Japanese (ja)
Inventor
祐介 宮道
敬太 黒須
賢 北山
浩孝 佐野
Original Assignee
京セラ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京セラ株式会社 filed Critical 京セラ株式会社
Publication of WO2019208238A1 publication Critical patent/WO2019208238A1/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

  • This disclosure relates to a solar cell module.
  • some solar cell modules have, for example, a structure in which a photoelectric conversion unit is surrounded by a sealing member between two opposing glass substrates in order to reduce moisture ingress from the outside. (For example, refer to the descriptions in Japanese Patent Nos. 5539869 and 5454773).
  • a solar cell module is disclosed.
  • the solar cell module includes a first glass plate, a second glass plate, a solar cell portion, one or more sealing members, and a resin portion.
  • the first glass plate has a first surface, a second surface in a state facing the opposite direction to the first surface, and a first state in which the first surface and the second surface are connected to each other.
  • the second glass plate has a third surface facing the second surface, a fourth surface facing the opposite direction to the third surface, and the third surface and the third surface. A second side surface in a state of connecting the four surfaces.
  • the solar cell unit is located in an inter-plate region between the first glass plate and the second glass plate.
  • the one or more sealing members include a first portion located along the first side surface, a second portion located along the second side surface, and an outer peripheral portion of the inter-plate region. A third portion located.
  • the resin portion includes a region between the first side surface and the first portion, a region between the second side surface and the second portion, a region between the second surface and the third portion, And a portion located in each of the regions between the third surface and the third portion.
  • the material for the sealing member includes a metal.
  • the solar cell module includes a first glass plate, a second glass plate, a solar cell portion, one or more sealing members, and a resin portion.
  • the first glass plate has a first surface, a second surface in a state facing the opposite direction to the first surface, and a first state in which the first surface and the second surface are connected to each other.
  • the second glass plate has a third surface facing the second surface, a fourth surface facing the opposite direction to the third surface, and the third surface and the third surface. A second side surface in a state of connecting the four surfaces.
  • the solar cell unit is located in an inter-plate region between the first glass plate and the second glass plate.
  • the one or more sealing members include a first portion located along the first side surface, a second portion located along the second side surface, and an outer peripheral portion of the inter-plate region. A third portion located.
  • the resin portion includes a region between the first side surface and the first portion, a region between the second side surface and the second portion, a region between the second surface and the third portion, And a portion located in each of the regions between the third surface and the third portion.
  • the sealing member has a moisture permeability smaller than that of the resin portion.
  • FIG. 1 is a plan view showing an appearance of an example of a solar cell module according to the first embodiment, the second embodiment, and the fifth embodiment as viewed from the front side.
  • FIG. 2A is a diagram showing a virtual cut surface of an example of the solar cell module according to the first embodiment along the line IIa-IIa in FIG.
  • FIG.2 (b) is a figure which shows the virtual cut surface of a part of solar cell module in the IIb part of Fig.2 (a).
  • Fig.3 (a) is a top view which shows the structure seen from the 1st element surface side of an example of a solar cell element.
  • FIG.3 (b) is a top view which shows the structure seen from the 2nd element surface side of an example of the solar cell element.
  • FIG. 5A is a diagram showing a virtual cut surface of an example of the solar cell module according to the second embodiment along the line IIa-IIa in FIG.
  • FIG.5 (b) is a figure which shows the virtual cut surface of a part of solar cell module in the Vb part of Fig.5 (a).
  • FIG. 6A is a diagram showing a virtual cut surface of another example of the solar cell module according to the second embodiment along the line IIa-IIa in FIG.
  • FIG.6 (b) is a figure which shows the virtual cut surface of a part of solar cell module in the VIb part of Fig.6 (a).
  • FIG. 5A is a diagram showing a virtual cut surface of an example of the solar cell module according to the second embodiment along the line IIa-IIa in FIG.
  • FIG.5 (b) is a figure which shows the virtual cut surface of a part of solar cell module in the Vb part of Fig.5 (a).
  • FIG. 6A is a diagram showing a virtual cut surface
  • FIG. 7A is a diagram showing a virtual cut surface corresponding to a virtual cut surface along the line IIa-IIa in FIG. 1 in an example of the solar cell module according to the third embodiment.
  • FIG.7 (b) is a figure which shows the virtual cut surface of a part of solar cell module in the VIIb part of Fig.7 (a).
  • FIG. 8A is a diagram showing a virtual cut surface corresponding to a virtual cut surface along the line IIa-IIa in FIG. 1 in another example of the solar cell module according to the third embodiment. is there.
  • FIG.8 (b) is a figure which shows the virtual cut surface of a part of solar cell module in the VIIIb part of Fig.8 (a).
  • FIG. 9 is a plan view showing an appearance of an example of the solar cell module according to the fourth embodiment and the fifth embodiment as viewed from the front side.
  • FIG. 10A is a diagram showing a virtual cut surface along the line IIa-IIa in FIGS. 1 and 9 in the example of the solar cell module according to the fifth embodiment.
  • FIG.10 (b) is a figure which shows the virtual cut surface of a part of solar cell module in the Xb part of Fig.10 (a).
  • FIG. 1 to 10B a right-handed XYZ coordinate system is attached.
  • the direction along the pair of sides of the front surface 1fs of the solar cell module 1 is the + X direction
  • the direction along the other pair of sides of the front surface 1fs is the + Y direction
  • the normal direction of the front surface 1fs that is orthogonal to both is the + Z direction.
  • the solar cell module 1 includes a light receiving surface (also referred to as a front surface) 1fs on which light is mainly incident, and a back surface 1bs located on the opposite side of the front surface 1fs.
  • a light receiving surface also referred to as a front surface
  • a back surface 1bs located on the opposite side of the front surface 1fs.
  • the front surface 1fs faces the + Z direction.
  • the back surface 1bs faces the ⁇ Z direction.
  • the + Z direction is set to a direction toward the sun going south.
  • the front surface 1fs has a rectangular shape.
  • the solar cell module 1 includes, for example, a solar cell panel 10.
  • the solar cell module 1 may include a terminal box Jb1, for example.
  • the terminal box Jb1 is located, for example, on the back surface 1bs of the solar cell panel 10 and can output the electricity obtained by power generation in the solar cell panel 10 to the outside.
  • the solar cell panel 10 includes, for example, a first protection member 2, a second protection member 3, a solar cell portion 4, a sealing member 5, and a resin.
  • a portion 6 and a filler 7 are provided.
  • the first protection member 2 and the second protection member 3 are positioned so as to sandwich the solar cell portion 4.
  • the 1st protection member 2 is located in the state which constitutes front 1fs of solar cell panel 10, for example.
  • the 2nd protection member 3 is located in the state which constitutes back side 1bs of solar cell panel 10, for example.
  • the first protective member 2 is a member having low moisture permeability and translucency.
  • the first protective member 2 has, for example, translucency with respect to light of a specific range of wavelengths and moisture permeability lower than that of the resin portion 6.
  • the wavelength of the specific range includes, for example, the wavelength of light that can be photoelectrically converted by the solar cell unit 4.
  • the wavelength of the specific range includes the wavelength of light with high irradiation intensity that constitutes sunlight, the photoelectric conversion efficiency of the solar cell module 1 can be improved.
  • a flat glass plate (also referred to as a first glass plate) is applied to the first protective member 2.
  • the first protective member 2 has a first surface F1, a second surface F2, and a first side surface S1.
  • the second surface F2 is in a state facing the reverse direction to the first surface F1.
  • the first side surface S1 is in a state where the first surface F1 and the second surface F2 are connected.
  • the first surface F1 is in a state of constituting the front surface 1fs.
  • the thickness of the first protective member 2 is set to about 1 millimeter (mm) to about 5 mm, for example. In the example of FIG.
  • the first protection member 2 has a rectangular outer shape when viewed from the front surface 1 fs side.
  • the 1st protection member 2 which has the said structure can protect the solar cell part 4 from the front 1fs side by high rigidity and low moisture permeability, for example.
  • the second protection member 3 is a member having low moisture permeability and translucency.
  • the second protective member 3 has a light-transmitting property with respect to light in a specific range of wavelengths and a moisture permeability lower than that of the resin portion 6, similarly to the first protective member 2.
  • the second protective member 3 for example, a flat glass plate (also referred to as a second glass plate) is applied.
  • the second protective member 3 has a third surface F3, a fourth surface F4, and a second side surface S2.
  • the third surface F3 is in a state facing the second surface F2 of the first protective member 2.
  • the fourth surface F4 is in a state facing the opposite direction to the third surface F3.
  • the second side surface S2 is in a state where the third surface F3 and the fourth surface F4 are connected.
  • the fourth surface F4 is in a state of constituting the back surface 1bs.
  • the thickness of the second protective member 3 is set to about 1 mm to 5 mm, for example.
  • the second protective member 3 has a rectangular outer shape when seen in a plan view from the front surface 1 fs side.
  • the 2nd protection member 3 which has the said structure can protect the solar cell part 4 from the back surface 1bs side by high rigidity and low moisture permeability, for example.
  • the solar cell unit 4 is located, for example, in a region A0 (also referred to as a plate-to-plate region) between the first protective member 2 and the second protective member 3.
  • the solar cell unit 4 includes, for example, a plurality of solar cell elements C1.
  • the plurality of solar cell elements C1 are positioned in a two-dimensional array.
  • the plurality of solar cell elements C ⁇ b> 1 are positioned in a planar arrangement so as to be positioned along the surface of the first protection member 2.
  • the solar cell unit 4 includes, for example, a plurality of first wiring members W1 and a plurality of second wiring members W2.
  • the solar cell unit 4 includes, for example, a plurality (eight in this case) of solar cell strings St1.
  • the solar cell string St1 includes, for example, a plurality (here, seven) solar cell elements C1 and a plurality of first wiring members W1.
  • the plurality of first wiring members W1 electrically connect solar cell elements C1 adjacent to each other among the plurality of solar cell elements C1.
  • the plurality of second wiring members W2 electrically connect solar cell strings St1 adjacent to each other among the plurality of solar cell strings St1.
  • the second wiring material W2 of the book is positioned in a state of being drawn out of the solar cell module 1.
  • the two second wiring members W ⁇ b> 2 are located in a state of being drawn out of the solar cell module 1 through, for example, a through hole located in the second protection member 3.
  • each of the plurality of solar cell elements C1 can convert light energy into electric energy, for example.
  • each of the plurality of solar cell elements C1 is a surface (also referred to as a first element surface) Sf1 positioned on the front (front) surface side.
  • a surface (also referred to as a second element surface) Sf2 located on the opposite side of the first element surface Sf1.
  • the first element surface Sf1 faces the + Z direction
  • the second element surface Sf2 faces the ⁇ Z direction.
  • the first element surface Sf1 is a front surface on which light is mainly incident
  • the second element surface Sf2 is a rear surface on which light is not incident than the front surface.
  • each of the plurality of solar cell elements C1 includes a semiconductor substrate Su1, a first output extraction electrode EL1, and a first current collector. It has electrode EL2, 2nd output extraction electrode EL3, and 2nd current collection electrode EL4.
  • the semiconductor substrate Su1 includes, for example, a crystalline semiconductor such as crystalline silicon, an amorphous semiconductor such as amorphous silicon, four elements of copper, indium, gallium, and selenium, or two elements of cadmium and tellurium. A compound semiconductor using is applied.
  • crystalline silicon is applied to the semiconductor substrate Su1.
  • the semiconductor substrate Su1 includes a region having a first conductivity type (also referred to as a first conductivity type region) and a region having a second conductivity type opposite to the first conductivity type (second conductivity type region). Also called).
  • the first conductivity type region is located, for example, on the second element surface Sf2 side in the ⁇ Z direction of the semiconductor substrate Su1.
  • the second conductivity type region is located in the surface layer portion on the first element surface Sf1 side in the + Z direction of the semiconductor substrate Su1.
  • the semiconductor substrate Su1 has a pn junction located at the interface between the first conductivity type region and the second conductivity type region.
  • the first output extraction electrode EL1 and the first current collecting electrode EL2 are located, for example, on the surface on the first element surface Sf1 side of the semiconductor substrate Su1.
  • a bus bar electrode is applied to the first output extraction electrode EL1.
  • a finger electrode is applied to the first current collecting electrode EL2.
  • two substantially parallel first output extraction electrodes EL1 are positioned on the first element surface Sf1 side of the semiconductor substrate Su1, and a plurality of substantially parallel first current collecting electrodes EL2 are provided. It is positioned so as to be substantially orthogonal to the two first output extraction electrodes EL1.
  • an insulating film as an antireflection film is located in a region where the first output extraction electrode EL1 and the first current collecting electrode EL2 are not formed in the second conductivity type region of the semiconductor substrate Su1. It may be.
  • the silver paste is applied to the first output extraction electrode EL1 after the silver paste is applied in a desired shape by screen printing or the like. It can be formed by firing.
  • the main component means a component having the largest (high) content ratio (also referred to as a content ratio).
  • a metal paste containing metal powder containing silver as a main component, an organic vehicle, and glass frit is applied.
  • the silver paste is applied to the first collector electrode EL2 in a desired shape by screen printing or the like, similar to the first output extraction electrode EL1. After that, the silver paste can be formed by firing.
  • the first output extraction electrode EL1 and the first current collecting electrode EL2 may be formed, for example, in separate steps or in the same step.
  • the second output extraction electrode EL3 and the second collector electrode EL4 are, for example, located on the surface on the second element surface Sf2 side of the semiconductor substrate Su1.
  • a bus bar electrode is applied to the second output extraction electrode EL3.
  • two rows of second output extraction electrodes EL3 that are substantially parallel to each other along the + Y direction are located on the second element surface Sf2 side of the semiconductor substrate Su1.
  • the second current collecting electrode EL4 is formed on the second element surface Sf2 side of the semiconductor substrate Su1 except for a portion where the second output extraction electrode EL3 and the second current collecting electrode EL4 are connected to each other by overlapping.
  • the two-output extraction electrode EL3 is located substantially over the entire area.
  • Each of the two rows of second output extraction electrodes EL3 includes, for example, four electrode portions arranged in one row. Further, for example, a thin film of oxide or nitride such as aluminum oxide in a desired pattern is formed between the first conductivity type region of the semiconductor substrate Su1 and the second output extraction electrode EL3 and the second collector electrode EL4. May exist as
  • the second output extraction electrode EL3 when the main component of the second output extraction electrode EL3 is silver, similarly to the first output extraction electrode EL1, the second output extraction electrode EL3 has a desired shape by screen printing or the like.
  • This silver paste can be baked and then formed.
  • the main component of the second collector electrode EL4 is aluminum
  • the aluminum collector is fired after the aluminum paste is applied in a desired shape by screen printing or the like. Can be formed.
  • the aluminum paste for example, a metal paste containing metal powder containing aluminum as a main component, an organic vehicle, and glass frit is applied.
  • the first wiring member W1 includes a first output extraction electrode EL1 of one solar cell element C1, and a second output extraction electrode EL3 of another solar cell element C1 adjacent to the one solar cell element C1. Are located in an electrically connected state.
  • the outer edge of the first wiring member W1 attached to each of the plurality of solar cell elements C1 is drawn with a virtually thin two-dot chain line.
  • a metal having a linear or belt-like conductivity is applied.
  • a copper foil having a thickness of about 0.1 mm to about 0.2 mm and a width of about 1 mm to about 2 mm covered with solder is applied to the first wiring member W1.
  • the first wiring member W1 is positioned in a state where it is electrically connected to each of the first output extraction electrode EL1 and the second output extraction electrode EL3, for example, by soldering.
  • the filler 7 is located so as to cover the solar cell portion 4 in the inter-plate region A0 between the first protective member 2 and the second protective member 3. In the first embodiment, the filler 7 is positioned so as to be filled in the inter-plate area A0 between the first protection member 2 and the second protection member 3, for example.
  • the filler 7 includes, for example, a filler (also referred to as a first filler) 7u located on the front surface 1fs side and a filler (also referred to as a second filler) 7b located on the back surface 1bs side. Including.
  • the 1st filler 7u is located in the state which has covered the whole surface by the side of the 1st protection member 2 of solar cell part 4, for example.
  • the 2nd filler 7b is located in the state which has covered the whole surface by the side of the 2nd protection member 3 of solar cell part 4, for example. For this reason, the solar cell part 4 exists in the state enclosed so that it might be pinched
  • the filler 7 has translucency, for example.
  • the material of the first filler 7u include an ethylene vinyl acetate copolymer (EVA), triacetyl cellulose (TAC), and polyethylene naphthalate (PEN) that have excellent translucency with respect to light in a specific range of wavelengths. Polyester resin or the like is applied.
  • a polyester resin such as EVA, TAC, or PEN is applied to the material of the second filler 7b, as in the case of the first filler 7u.
  • the first filler 7u and the second filler 7b may be composed of, for example, two or more kinds of materials.
  • the sealing member 5 is a member for reducing the intrusion of moisture from the outer peripheral edge in the inter-plate area A0 between the first protective member 2 and the second protective member 3.
  • the sealing member 5 includes, for example, a first part P1, a second part P2, and a third part P3.
  • the first portion P ⁇ b> 1 is located along the first side surface S ⁇ b> 1 of the first protection member 2.
  • the second portion P2 is located along the second side surface S2 of the second protective member 3.
  • the third portion P3 is located in the outer peripheral portion A0p of the inter-plate region A0.
  • the first portion P1 and the second portion P2 constitute a flat plate portion along the XZ plane, and a portion protruding from the flat plate portion along the XY plane is formed. It is in the state which comprises the 3rd part P3.
  • the virtual cross section perpendicular to the longitudinal direction of the sealing member 5 has a T-shape.
  • the sealing member 5 has a moisture permeability smaller than that of the resin portion 6. Due to the presence of such a sealing member 5, deterioration of the solar cell module 1 due to moisture intrusion can be reduced.
  • the sealing member 5 includes a third portion P3 located in the outer peripheral portion A0p of the inter-plate region A0. For this reason, for example, the cross-sectional area (also referred to as the transmission cross-sectional area) of at least a part of the path from the outside of the solar cell module 1 to the solar cell unit 4 can be reduced. Thereby, for example, moisture hardly enters the solar cell unit 4 from the outside of the solar cell module 1.
  • the sealing member 5 includes a first portion P1 along the first side surface S1 and a second portion P2 along the second side surface S2.
  • the length of the section where the cross-sectional area (transmission cross-sectional area) is small in the path from the outside of the solar cell module 1 to the solar cell unit 4 can be increased.
  • deterioration of the solar cell module 1 due to moisture intrusion can be reduced.
  • a metal is applied as a material of the sealing member 5 having a moisture permeability smaller than that of the resin portion 6.
  • a metal for example, aluminum or titanium having a relatively light weight and excellent corrosion resistance is used.
  • another material having a moisture permeability smaller than that of butyl rubber constituting the resin portion 6 may be applied.
  • the moisture permeability of various materials can be measured by, for example, a measurement method based on the cup method defined by Z0208 or the sensor method or gas analysis method defined by K7129 in Japanese Industrial Standards (JIS).
  • the sensor method includes, for example, a measurement method using a moisture sensor and an infrared sensor.
  • the gas analysis method includes, for example, a measurement method using a chromatograph and API-MS.
  • the moisture permeability of various materials may be measured by a measurement method based on E-96 of the American Society for Testing and Materials (ASTM) standard, for example.
  • This measurement value is a value obtained by a measurement method based on ASTM standard E-96. This measured value is 100 degrees Fahrenheit (37.8 degrees Celsius) for a cup filled with water and whose upper opening was made by a solvent method and was covered with a film of the material to be measured having a thickness of 0.11 mm.
  • the material having a moisture permeability smaller than that of butyl rubber includes, for example, Teflon (registered trademark), polyvinylidene chloride, polyisobutylene, and polyethylene.
  • Teflon registered trademark
  • polyvinylidene chloride polyvinylidene chloride
  • polyisobutylene polyethylene.
  • the moisture permeability of Teflon (registered trademark) and polyvinylidene chloride is 1.2 g / (m 2 / day), respectively.
  • the moisture permeability of the polyvinylidene chloride is 3.7 g / (m 2 / day).
  • the moisture permeability of polyisobutylene is 4.3 g / (m 2 / day).
  • sealing member 5 for example, a member in which the surface of the resin sheet is covered with a coating layer such as glass or Teflon (registered trademark) may be employed.
  • sealing member 5 for example, an annular member positioned along the annular outer peripheral portion A0p of the inter-plate region A0 can be adopted.
  • the first side surface S1 of the first protection member 2 is located at the end of the first protection member 2 in the + X direction
  • the first A side surface S11 is located at the end of the first protection member 2 in the + Y direction
  • the first portion P1 of the sealing member 5 includes a portion along the first A side surface S11, a portion along the first B side surface S12, a portion along the first C side surface S13, and a first D side surface.
  • the portion along S14 is positioned in a state where the portions are connected in a ring shape in the order described.
  • the second side surface S2 of the second protective member 3 is located at the end of the second protective member 3 in the + X direction of the second A side surface S21 and the end of the second protective member 3 in the + Y direction.
  • the second B side surface S22 that is positioned, the second C side surface S23 that is positioned at the ⁇ X direction end of the second protective member 3, and the second D side surface that is positioned at the ⁇ Y direction end of the second protective member 3 Assume a case of having S24.
  • the second portion P2 of the sealing member 5 includes a portion along the second A side surface S21, a portion along the second B side surface S22, a portion along the second C side surface S23, and a second D side surface.
  • a portion along S24 is positioned in a state where the portions are connected in a ring shape in the order described.
  • the third portion P3 of the sealing member 5 includes a portion along the + X direction end of the inter-plate region A0 and an end of the inter-plate region A0 in the + Y direction in the outer peripheral portion A0p of the inter-plate region A0.
  • the sealing member 5 is an annular member positioned along the annular outer peripheral portion A0p of the inter-plate region A0, when manufacturing the solar cell module 1 by the laminating process, The position of the sealing member 5 is less likely to shift with respect to the first protective member 2 and the second protective member 3. Thereby, for example, deterioration of the solar cell module 1 due to moisture intrusion can be reduced.
  • the annular sealing member 5 can be formed using, for example, metal casting or resin integral molding.
  • the resin portion 6 includes, for example, a portion located in a region between the first side surface S1 of the first protection member 2 and the first portion P1 of the sealing member 5, and the second side surface of the second protection member 3. And a portion located in a region between S2 and the second portion P2 of the sealing member 5.
  • the resin portion 6 includes, for example, a portion located in a region between the second surface F2 of the first protection member 2 and the third portion P3 of the sealing member 5 and a second portion of the second protection member 3. And a portion located in a region between the third surface F3 and the third portion P3 of the sealing member 5.
  • the region between the first side surface S1 and the first portion P1 is located in a state where a part of the resin portion 6 is filled.
  • the region between the second side surface S2 and the second portion P2 is positioned in a state where a part of the resin portion 6 is filled.
  • the region between the second surface F2 and the third portion P3 is located in a state where a part of the resin portion 6 is filled.
  • the region between the third surface F3 and the third portion P3 is located in a state where a part of the resin portion 6 is filled.
  • a material having a moisture permeability smaller than that of the filler 7 is applied to the material of the resin portion 6.
  • butyl rubber having a moisture permeability smaller than that of the material of the filler 7 is applied to the resin portion 6.
  • the resin part 6 contains butyl rubber having a moisture permeability smaller than that of the filler 7
  • moisture intrusion into the solar cell module 1 can be reduced due to the presence of the butyl rubber.
  • the interval between the first side surface S1 of the first protective member 2 and the first portion P1 of the sealing member 5 is defined as a first interval D1.
  • the interval between the second side surface S2 of the second protective member 3 and the second portion P2 of the sealing member 5 is defined as a second interval D2.
  • the interval between the second surface F2 of the first protective member 2 and the third surface F3 of the second protective member 3 is defined as a third interval D3.
  • each of the first interval D1 and the second interval D2 is smaller than the third interval D3, a route through which moisture permeates in a route from the outside of the solar cell module 1 to the solar cell unit 4.
  • the length of a section having a small cross-sectional area (also referred to as a transmission cross-sectional area) can be increased. Thereby, for example, moisture hardly enters the solar cell module 1.
  • interval D3 is about 1 mm
  • interval D2 to about 0.25 mm or less can be considered.
  • the interval between the second surface F2 of the first protective member 2 and the third portion P3 of the sealing member 5 is defined as a fourth interval D4.
  • the interval between the third surface F3 of the second protective member 3 and the third portion P3 of the sealing member 5 is defined as a fifth interval D5.
  • the thickness T3 of the third portion P3 is set to about 0.5 mm
  • each of the fourth distance D4 and the fifth distance D5 is set to about 0.25 mm.
  • the structure which performs is considered.
  • the thickness of the portion of the resin portion 6 located between the second surface F2 of the first protective member 2 and the third portion P3 of the sealing member 5 is the fourth distance D4. Is equal to Further, for example, the thickness of the portion of the resin portion 6 that is located between the third surface F3 of the second protective member 3 and the third portion P3 of the sealing member 5 is equal to the fifth interval D5. equal.
  • each of the thickness T1 of the first portion P1 and the thickness T2 of the second portion P2 is larger than the thickness T3 of the third portion P3, the impact resistance of the solar cell module 1 is increased. It can improve.
  • Each of the thickness T1 of the first portion P1 and the thickness T2 of the second portion P2 can be set to about 5 mm or less, for example.
  • a first protective member 2 a first sheet Sh1, a solar cell unit 4, a sealing member 5, a second sheet Sh2, and a second protective member 3 are prepared.
  • the sealing member 5 for example, a member in which a resin part Pr6 (such as butyl rubber before cross-linking) Pr6 to be a base of the resin part 6 is arranged at least on the third part P3 at a desired position is adopted. .
  • the resin portion Pr6 may be located on the first portion P1 and the second portion P2.
  • the first sheet Sh1 for example, a sheet made of a resin (such as EVA) before cross-linking that becomes the element of the first filler 7u is employed.
  • the second sheet Sh2 for example, a sheet made of a resin (such as EVA) before cross-linking that becomes the element of the second filler 7b is employed.
  • the first protective member 2, the first sheet Sh1, the solar cell unit 4, the sealing member 5, the second sheet Sh2, and the second 2 Protective members 3 are stacked in this order. Thereby, the stacked body SB1 is formed. At this time, wiring for being drawn out of the solar cell module 1 to the outside of the solar cell module 1 and connected to the terminal box Jb1 or the like is appropriately arranged.
  • a laminate process for the stacked body SB1 is performed.
  • the laminate SB1 is integrated by using a laminator (laminator).
  • laminator laminator
  • the stacked body SB1 is placed on the heater panel Sg0 in the chamber, and the stacked body SB1 is heated from about 100 ° C. to about 200 ° C. while the pressure in the chamber is reduced from about 50 Pa to 150 Pa.
  • the first sheet Sh1 and the second sheet Sh2 are in a state where they can flow to some extent by heating.
  • the stacked body SB1 is pressed with a diaphragm sheet or the like in the chamber, and the stacked body SB1 is integrated.
  • the solar cell panel 10 as shown in FIGS. 1 to 2B is formed.
  • an annular convex portion Pr0 may be present on the heater panel Sg0 in a state where the concave portion Re0 is formed inside.
  • the stacked body SB1 can be placed so as to fit into the recess Re0 of the heater panel Sg0.
  • the sealing member 5 may be configured by a plurality of members instead of an integral annular member.
  • the laminator may not have the convex portion Pr0 and the concave portion Re0.
  • the terminal box Jb1 and the like are appropriately attached to the solar cell panel 10.
  • the wiring drawn out from the solar cell unit 4 to the outside of the solar cell module 1 is appropriately connected to the terminals in the terminal box Jb1. Thereby, the solar cell module 1 is formed.
  • the sealing member 5 made of a material such as a metal having a moisture permeability smaller than that of the resin portion 6 is located in the outer peripheral portion A0p of the inter-plate region A0. And has a third portion P3.
  • the cross-sectional area (transmission cross-sectional area) of at least a part of the path from the outside of the solar cell module 1 to the solar cell unit 4 can be reduced. Thereby, for example, moisture hardly enters the solar cell unit 4 from the outside of the solar cell module 1.
  • the sealing member 5 includes a first portion P1 along the first side surface S1 and a second portion P2 along the second side surface S2.
  • the length of the section having a small cross-sectional area (transmission cross-sectional area) in the path from the outside of the solar cell module 1 to the solar cell unit 4 can be increased.
  • deterioration of the solar cell module 1 due to moisture intrusion can be reduced. Therefore, for example, the lifetime of the solar cell module 1 can be extended.
  • the sealing member 5 may have a first projecting portion Pr1.
  • the first projecting portion Pr1 is located in the thickness direction (also referred to as the first thickness direction) of the first protection member 2 from the second surface F2 toward the first surface F1, and is more than that from the first portion P1 to the first surface F1. It is a part in a protruding state.
  • the first thickness direction is the + Z direction.
  • the first projecting portion Pr1 is formed. Due to the presence, the outer peripheral portion of the first protection member 2 can be protected. As a result, for example, the impact resistance performance at the outer periphery of the solar cell module 1 can be improved.
  • the laminated body SB1 including the sealing member 5 is integrated by the laminating process, the first surface F1 of the first protective member 2 and the sealing member on the heater panel Sg0 of the laminator. Convex portions or jigs corresponding to the steps generated between the first projecting portion Pr1 and the fifth projecting portion Pr1 are arranged.
  • the sealing member 5 may have a second protruding portion Pr2.
  • the second projecting portion Pr2 has a thickness direction (also referred to as a second thickness direction) of the second protective member 3 from the third surface F3 toward the fourth surface F4, which is greater than the second portion P2 to the fourth surface F4. It is a part in a protruding state.
  • the second thickness direction is the ⁇ Z direction. If such a configuration is adopted, for example, even if the structure of the solar cell module 1 is a frameless structure in which no frame is attached around the solar cell panel 10, the presence of the second projecting portion Pr2 The outer peripheral portion of the second protection member 3 can be protected.
  • the impact resistance performance at the outer periphery of the solar cell module 1 can be improved.
  • the fourth surface F4 of the second protective member 3 and the second surface of the sealing member 5 in the laminator A jig or the like corresponding to the step generated between the projecting portion Pr2 and the like is disposed.
  • the first projecting portion Pr1 is at least a part of the outer peripheral portion of the first surface F1 of the first protective member 2. It may be located so as to cover.
  • the resin portion 6 may have a portion positioned so as to exist in a region between the first surface F1 and the first protruding portion Pr1. If such a configuration is adopted, for example, the length of a section having a small transmission cross-sectional area may be increased in the route from which rainwater on the first surface F1 reaches the solar cell unit 4. Thereby, for example, intrusion of rainwater from the first surface F1 into the solar cell module 1 can be reduced.
  • the structure of the solar cell module 1 is a frameless structure in which no frame is attached around the solar cell panel 10, the outer peripheral portion of the first protection member 2 is protected by the first projecting portion Pr1. Can be done. As a result, for example, the impact resistance performance of the outer peripheral portion of the solar cell module 1 can be improved.
  • the interval between the first surface F1 and the first protruding portion Pr1 may be smaller than the interval D3 between the second surface F2 and the third surface F3.
  • the distance between the first surface F1 and the first projecting portion Pr1 is the fourth distance D4 between the second surface F2 and the third portion P3, the third surface F3, and the third portion P3. It may be smaller than the sum of the fifth interval D5 between the two.
  • the length of the section where the cross-sectional area (transmission cross-sectional area) of the path through which moisture permeates is small in the path from the outside of the solar cell module 1 to the solar cell unit 4 can be increased. Thereby, for example, moisture hardly enters the solar cell module 1.
  • the second projecting portion Pr2 is positioned so as to cover at least a part of the outer peripheral portion of the fourth surface F4 of the second protective member 3. You may do it.
  • the resin portion 6 may have a portion positioned so as to exist in a region between the fourth surface F4 and the second protruding portion Pr2. If such a configuration is employed, for example, the length of a section having a small transmission cross-sectional area may be increased in a route where rainwater on the fourth surface F4 reaches the solar cell unit 4. Thereby, for example, intrusion of rainwater from the fourth surface F4 into the solar cell module 1 can be reduced.
  • the outer peripheral portion of the second protective member 3 is protected by the second projecting portion Pr2. Can be done.
  • the impact resistance performance of the outer peripheral portion of the solar cell module 1 can be improved.
  • the interval between the fourth surface F4 and the second projecting portion Pr2 may be smaller than the interval D3 between the second surface F2 and the third surface F3.
  • the distance between the fourth surface F4 and the second projecting portion Pr2 is the fourth distance D4 between the second surface F2 and the third portion P3, the third surface F3, and the third portion P3. It may be smaller than the sum of the fifth interval D5 between the two.
  • the length of the section where the cross-sectional area (transmission cross-sectional area) of the path through which moisture permeates is small in the path from the outside of the solar cell module 1 to the solar cell unit 4 can be increased. Thereby, for example, moisture hardly enters the solar cell module 1.
  • the annular sealing member 5 is divided into a plurality of sealing members in the circumferential direction.
  • a configuration may be employed.
  • each of the first surface F1, the second surface F2, the third surface F3, and the fourth surface F4 is rectangular. Further, when the first protective member 2 and the second protective member 3 are seen in a plan view, in the first protective member 2 and the second protective member 3, the first corner portion Cn1, the second protective member 3 are counterclockwise in the circumferential direction. The two corner portions Cn2, the third corner portion Cn3, and the fourth corner portion Cn4 are located in this order.
  • the plurality of sealing members 5 include a first sealing member 51, a second sealing member 52, a third sealing member 53, and a fourth sealing member 54.
  • the first sealing member 51 is formed in an L shape along the first corner portion Cn1. Located to bend. More specifically, the first sealing member 51 extends from the middle of the first A side surface S11 and the second A side surface S21 to the middle of the first B side surface S12 and the second B side surface S22 via the first corner Cn1. It is located so that it may be bent in L shape along. When the first protective member 2, the second protective member 3, and the second sealing member 52 are viewed in plan, the second sealing member 52 bends in an L shape along the second corner portion Cn ⁇ b> 2. Is located.
  • the second sealing member 52 extends from the middle of the first B side surface S12 and the second B side surface S22 to the middle of the first C side surface S13 and the second C side surface S23 via the second corner portion Cn2. It is located so that it may be bent in L shape along.
  • the third sealing member 53 is bent in an L shape along the third corner portion Cn3. Is located. More specifically, the third sealing member 53 extends from the middle of the first C side surface S13 and the second C side surface S23 to the middle of the first D side surface S14 and the second D side surface S24 via the third corner Cn3. It is located so that it may be bent in L shape along.
  • the fourth sealing member 54 bends in an L shape along the fourth corner portion Cn4. Is located. More specifically, the fourth sealing member 54 extends from the middle of the first D side surface S14 and the second D side surface S24 to the middle of the first A side surface S11 and the second A side surface S21 via the fourth corner portion Cn4. It is located so that it may be bent in L shape along.
  • a gap (also referred to as a first gap) Gp1 may exist between the first sealing member 51 and the second sealing member 52.
  • a gap (also referred to as a second gap) Gp2 may exist between the second sealing member 52 and the third sealing member 53.
  • a gap (also referred to as a third gap) Gp3 may exist between the third sealing member 53 and the fourth sealing member 54.
  • a gap (also referred to as a fourth gap) Gp4 may exist between the fourth sealing member 54 and the first sealing member 51.
  • a resin portion Pr6 (see FIGS. 4A and 4B) that serves as a base of the resin portion 6 may be disposed on a part of each member of the stopper member 53 and the fourth sealing member 54. .
  • the first protective member 2 and the second protective member 3 the first sealing member 51, the second sealing member 52, the third sealing member 53, and the fourth The resin portion 6 is easily filled between each member of the sealing member 54.
  • the presence of the resin portion 6 can reduce the intrusion of moisture from the outside of the solar cell module 1 toward the solar cell portion 4.
  • deterioration of the solar cell module 1 due to moisture intrusion can be reduced.
  • the plurality of sealing members 51, 52, 53, 54 may be attached with a resin such as butyl rubber. Even if such a configuration is employed, for example, the solar cell module 1 that is not easily deteriorated by the ingress of moisture can be easily formed.
  • the third portion P3 has a thickness that approaches the solar cell portion 4.
  • a portion (also referred to as a tapered portion) P3e that is in a tapered state that is small may be included.
  • the resin part Pr6 that becomes the element of the resin part 6 disposed on the third part P3 in the laminate SB1 before the lamination process (see FIGS. 4A and 4B). Is liable to flow into the region between the first side surface S1 and the first portion P1 and the region between the second side surface S2 and the second portion P2 by the laminating process. Thereby, for example, the resin portion 6 is easily filled between the first protective member 2 and the second protective member 3 and the sealing member 5.
  • a plurality of stacked bodies SB1 are integrated.
  • the sealing members 51, 52, 53, and 54 are attached with a resin such as butyl rubber.
  • the third portion P3 includes the tapered portion P3e described above, the resistance due to the resin such as butyl rubber is reduced when the third portion P3 is inserted into the inter-plate region A0.
  • the plurality of sealing members 51, 52, 53, 54 can be easily attached to the laminated body SB1 after integration.
  • the entire third portion P ⁇ b> 3 is in a tapered state in which the thickness decreases as it approaches the solar cell unit 4.
  • the portion of the third portion P3 located on the side away from the solar cell portion 4 has a constant thickness, and the portion of the third portion P3 located on the side closer to the solar cell portion 4 The thickness may be reduced as the solar cell part 4 is approached.
  • the entire third portion P3 may be a tapered portion P3e, or a portion of the third portion P3 located on the solar cell unit 4 side is a tapered portion P3e. Also good.
  • the resin portion Pr6 (see FIG. 4A and FIG. 4B) that becomes the base of the resin portion 6 is pressed by the pressing force. It may have the property of being easily crushed. If such a configuration is adopted, for example, the first interval D1, the second interval D2, the fourth interval D4, and the fifth interval D5 tend to be small. Thereby, for example, the cross-sectional area (transmission cross-sectional area) of at least a part of the path from the outside of the solar cell module 1 to the solar cell unit 4 tends to be small. As a result, for example, the deterioration of the solar cell module 1 due to moisture intrusion is easily reduced.
  • each of the first sealing member 51, the second sealing member 52, the third sealing member 53, and the fourth sealing member 54 is bent in an L shape. However, it may have a configuration positioned so as to extend linearly.
  • the first sealing member 51 may have a configuration that is linearly positioned along the first A side surface S11 and the second A side surface S21.
  • the second sealing member 52 may be positioned linearly along the first B side surface S12 and the second B side surface S22.
  • the third sealing member 53 may be positioned linearly along the first C side surface S13 and the second C side surface S23.
  • the fourth sealing member 54 may be positioned linearly along the first D side surface S14 and the second D side surface S24.
  • a part of the resin portion 6 may be located between the solar cell portion 4 and the sealing member 5.
  • moisture hardly reaches the solar cell unit 4 from the outside of the solar cell module 1.
  • the solar cell module 1 is hardly deteriorated.
  • the solar cell unit 4 can be arranged in the inter-plate region A0 as the portion of the resin unit 6 located between the solar cell unit 4 and the sealing member 5 is smaller. A wide range of areas. As a result, for example, the conversion efficiency of the solar cell module 1 can be improved.
  • the filler 7 filled between the surface and the solar cell part 4 may not be present.
  • the solar cell module 1 may include, for example, a frame.
  • the frame is positioned along the outer periphery of the solar cell panel 10 and can protect the outer periphery of the solar cell panel 10.
  • a material for the frame for example, aluminum or titanium that is lightweight and excellent in corrosion resistance is used.
  • a sealing material having low moisture permeability such as butyl rubber may be filled between the side surface of the solar cell panel 10 and the frame.

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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 cellule solaire, pourvu d'une première plaque de verre (2), d'une seconde plaque de verre (3), d'une unité de cellule solaire (4), d'un ou plusieurs éléments d'étanchéité (5), et d'une partie en résine (6). La première plaque de verre (2) présente une première surface (F1), une deuxième surface (F2) et une première surface latérale (S1). La seconde plaque de verre (3) présente une troisième surface (F3), une quatrième surface (F4) et une seconde surface latérale (S2). Le ou les éléments d'étanchéité (5) présentent une première partie (P1) située le long de la première surface latérale (S1), une deuxième partie (P2) située le long de la seconde surface latérale (S2), et une troisième partie (P3) située sur la partie périphérique externe d'une région inter-plaques. La partie en résine (6) comprend une partie située entre la première surface latérale (S1) et la première partie (P1), une partie située entre la seconde surface latérale (S2) et la deuxième partie (P2), une partie située entre la deuxième surface (F2) et la troisième partie (P3), et une partie située entre la troisième surface (F3) et la troisième partie (P3). Le matériau constituant l'élément d'étanchéité (5) comprend un métal.
PCT/JP2019/015770 2018-04-23 2019-04-11 Module de cellule solaire WO2019208238A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-082179 2018-04-23
JP2018082179 2018-04-23

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WO2019208238A1 true WO2019208238A1 (fr) 2019-10-31

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004179207A (ja) * 2002-11-25 2004-06-24 Sobi Kogei:Kk アングル部材の継合方法およびフレーム枠の製造方法
US20120055550A1 (en) * 2010-09-02 2012-03-08 First Solar, Inc. Solar module with light-transmissive edge seal
WO2012073868A1 (fr) * 2010-11-30 2012-06-07 三洋電機株式会社 Dispositif de conversion photoélectrique et son procédé de fabrication
US20140332062A1 (en) * 2011-11-25 2014-11-13 Lg Innotek Co., Ltd. Solar cell apparatus
US20150187974A1 (en) * 2012-05-30 2015-07-02 Lg Innotek Co., Ltd. Solar cell module and manufacturing method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004179207A (ja) * 2002-11-25 2004-06-24 Sobi Kogei:Kk アングル部材の継合方法およびフレーム枠の製造方法
US20120055550A1 (en) * 2010-09-02 2012-03-08 First Solar, Inc. Solar module with light-transmissive edge seal
WO2012073868A1 (fr) * 2010-11-30 2012-06-07 三洋電機株式会社 Dispositif de conversion photoélectrique et son procédé de fabrication
US20140332062A1 (en) * 2011-11-25 2014-11-13 Lg Innotek Co., Ltd. Solar cell apparatus
US20150187974A1 (en) * 2012-05-30 2015-07-02 Lg Innotek Co., Ltd. Solar cell module and manufacturing method thereof

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