WO2013146629A1 - 太陽電池封止材シート、及び、太陽電池モジュール - Google Patents

太陽電池封止材シート、及び、太陽電池モジュール Download PDF

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Publication number
WO2013146629A1
WO2013146629A1 PCT/JP2013/058477 JP2013058477W WO2013146629A1 WO 2013146629 A1 WO2013146629 A1 WO 2013146629A1 JP 2013058477 W JP2013058477 W JP 2013058477W WO 2013146629 A1 WO2013146629 A1 WO 2013146629A1
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WO
WIPO (PCT)
Prior art keywords
solar cell
protrusion
sealing material
sheet
protrusions
Prior art date
Application number
PCT/JP2013/058477
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English (en)
French (fr)
Japanese (ja)
Inventor
小林祥之
中原誠
安藤隆
Original Assignee
東レ株式会社
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 東レ株式会社 filed Critical 東レ株式会社
Priority to CN201380016918.9A priority Critical patent/CN104272468B/zh
Priority to KR1020147025999A priority patent/KR101559564B1/ko
Priority to JP2013514428A priority patent/JP6232627B2/ja
Publication of WO2013146629A1 publication Critical patent/WO2013146629A1/ja

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10018—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising only one glass sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10559—Shape of the cross-section
    • B32B17/10577—Surface roughness
    • B32B17/10587—Surface roughness created by embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10788—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing ethylene vinylacetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • 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 encapsulant sheet and a solar cell module.
  • a solar cell module is manufactured by sealing a cell with a sealing material resin.
  • the glass is warped by heating from the hot plate in the laminating step, the temperature of the encapsulant becomes partially insufficient, and the solar battery cell is pressed against the unmelted encapsulant sheet to generate cracks. In some cases, this contributes to a decrease in module yield. In addition, air bubbles may remain between the sealing material sheet and the cell during lamination, which may deteriorate the appearance of the module.
  • embossing is performed in the manufacturing process of the sealing material sheet, a protrusion is formed on the sheet surface, and the cell is cracked by improving the cushioning property of the sheet (hereinafter referred to as cell crack). ) And measures to secure an air discharge route.
  • Patent Document 1 proposes a sealing material sheet in which a plurality of protrusions having a skirt portion having a cylindrical shape or a truncated cone shape as shown in FIG. 1 and a convex curved top portion are formed.
  • the present inventors have intensively studied to achieve the above object, and have found that the above problem can be solved by adopting the following configuration.
  • a solar cell encapsulant sheet made of a thermoplastic resin having 40 to 2300 protrusions per 1 cm 2 on at least one surface, the protrusions having a truncated pyramid shape with a polygonal bottom surface,
  • a solar cell encapsulant sheet comprising: a top portion having a convex curved surface shape, and a top portion ratio X defined below of the protrusion is 0.1 or more and 0.4 or less. Definition of the top ratio X: (1) P is the top of the protrusion, P ′ is the point at which the top P is projected onto the bottom of the truncated pyramid, and Q is the perpendicular foot drawn from P ′ to any side of the bottom of the truncated pyramid.
  • a cross section passing through the points (P, P ′, Q) is taken.
  • a section obtained by equally dividing the line segment P′Q by 10 is defined as sections R 1 to R 10 from the point Q, and a section R j on the line segment P′Q.
  • the straight lines that pass through the boundary points r j ⁇ 1 and r j of (1 ⁇ j ⁇ 10) and are orthogonal to the line segment P′Q are S j ⁇ 1 and S j, and the intersection of the straight line and the curve PQ is t j ⁇ 1 and t j .
  • an acute angle formed by the straight line connecting the points t j ⁇ 1 and t j and the straight line P′Q is ⁇ j .
  • the number of sections R j satisfying ( ⁇ 1 + ⁇ 2 ) / 2 ⁇ j ⁇ 4 ° (1 ⁇ j ⁇ 10) is obtained and divided by 10.
  • the above (1) to (3) are performed on each side of the bottom polygon, and the average is defined as the top ratio X of the protrusions.
  • the present invention it is possible to provide a high-quality solar cell sealing material sheet that suppresses uneven gloss while maintaining the cushioning property and degassing property of the sealing material sheet.
  • FIG. 3 is a partially enlarged view of a cross section including points (P, P ′, Q) of protrusions shown in FIG. 2. It is a schematic diagram of the other aspect of the surface protrusion part of the sealing material sheet of this invention.
  • the solar cell encapsulant sheet of the present invention is a solar cell encapsulant sheet made of a thermoplastic resin having 40 to 2300 protrusions per 1 cm 2 on at least one surface, and the protrusions are polygonal.
  • a solar cell encapsulating having a truncated pyramidal trapezoidal skirt and a convex curved top having a top ratio X defined as described later of the projection of 0.1 to 0.4 It is a material sheet.
  • thermoplastic resin used for the solar cell encapsulant sheet of the present invention is not particularly limited, but is a thermoplastic resin that is transparent and melts at a hot plate temperature (130 ° C. or higher and 160 ° C. or lower) during vacuum lamination.
  • a hot plate temperature 130 ° C. or higher and 160 ° C. or lower
  • EVA ethylene-vinyl acetate copolymer
  • ethylene-methyl methacrylate copolymer ethylene-ethyl acrylate copolymer
  • silane-modified polyethylene maleic acid-modified polyethylene
  • ionomer Polyvinyl butyral
  • the solar cell encapsulant sheet of the present invention is a multilayer sheet in which layers of different types of resin and additives and different amounts are laminated even if the type of resin and the type and amount of additive are uniform. May be.
  • the solar cell sealing material sheet of the invention has at least one of a 2300 or fewer projections 1 cm 2 per 40 or more on the surface. If the number of protrusions is less than 40 per cm 2 , cell cracks occur because the stress applied to each protrusion increases when the solar cell is pressed against an unmelted encapsulant sheet in the lamination process. It's easy to do. On the other hand, if the number of protrusions exceeds 2300 per 1 cm 2 , the individual protrusions become smaller, cushioning properties are reduced, cell cracks are likely to occur in the lamination process, degassing properties are also reduced, and bubbles are likely to remain. Become.
  • the protrusion on the surface of the solar cell encapsulant sheet of the present invention is composed of a truncated pyramidal skirt 11 having a polygonal bottom and a top 12 having a convex curved shape, as shown in FIGS. Is done.
  • the bottom shape of the truncated pyramid is preferably a triangle, a quadrangle, a pentagon, or a hexagon. If it is a heptagon or more polygon, it becomes a shape close to a curved surface and light reflection occurs, and uneven glossiness of the sheet may be recognized.
  • the solar cell encapsulant sheet of the present invention has a top portion ratio X defined below of 0.1 or more and 0. .4 or less, preferably 0.25 or more and 0.4 or less.
  • FIG. 3 shows a partially enlarged view of a cross section passing through the point (P, P ′, Q).
  • a section obtained by dividing the line segment P′Q into 10 equal parts is referred to as sections R 1 to R 10 from the point Q.
  • the top ratio X thus obtained is less than 0.1, the top of the projection becomes sharp, stress is concentrated on the tip of the projection in the laminating process, and cell cracks are likely to occur.
  • the top ratio X exceeds 0.4, the ratio of the curved surface portion becomes large and reflection occurs, so that uneven glossiness of the sealing material sheet can be seen.
  • the top ratio X is obtained with a valley formed between adjacent protrusions as a boundary.
  • the projection When the projection is viewed from above, if the topmost part P is biased near the contour of the projection, the projection collapses when the solar battery cell is pressed against the unmelted sealing material sheet, and the cushioning property is lowered.
  • the top is preferably near the center.
  • the shortest distance from the point P ′ at which the topmost part P is projected onto the bottom surface to the polygonal side of the bottom surface of the truncated pyramid is defined as L P ′, and the bottom surface when the shortest distance to the sides of the polygon and the L G of the center of L P '/ L G of the projection apex is preferably 0.5 or more and 1 or less. It is more preferred centrality L P '/ L G of the projection apex is 0.8 or more and 1 or less.
  • the solar cell encapsulant sheet of the present invention can form protrusions by pressing a mold engraved with a concave pattern on a heated sheet and then cooling.
  • the protrusions may be formed by batch processing using a metal mold made of a sheet metal plate engraved with a concave pattern, or a roll engraved with a concave pattern on the surface and an opposing roll.
  • the protrusions may be formed continuously by being sandwiched between them.
  • the aspect ratio H / D of the protrusion is 0.03 or more and 0.80 or less. preferable.
  • H / D is less than 0.03, cushioning properties obtained are small, and cell cracks may occur in the laminating process.
  • H / D exceeds 0.80, stress concentrates on the top of the protrusions, and cell cracks may occur in the lamination process.
  • the aspect ratio H / D of the protrusion is 0.03 or more and 0.30 or less, productivity is improved because the time required for forming the protrusion in the batch process is short while ensuring the minimum cushioning property. From the viewpoint, it is preferable, and from this viewpoint, 0.03 or more and less than 0.15 is more preferable. On the other hand, if it is 0.15 or more and 0.80 or less, since the cushioning property is better, it is preferable in that a wide range of conditions that can be processed without generation of cell cracks in the laminating step can be taken. 0.60 or less is more preferable.
  • top ratio X the center of L P '/ L G of the projection apex, while maintaining the cushioning property and deaeration by controlling the aspect ratio H / D of the protrusion, improve sheet quality suppressed gloss unevenness can do.
  • the thickness of the solar cell encapsulant sheet of the present invention can be set as appropriate, but the basis weight thickness (thickness when leveling the surface protrusions) is preferably 0.3 mm or more and 1 mm or less. If the fabric weight is less than 0.3 mm, the interconnector that is electrically connected to both the front and back surfaces of the cell cannot be embedded, and cell cracks may occur in the lamination process starting from the connector. May decrease.
  • Such a solar cell encapsulant sheet is cut into a cut sheet having a desired length and used for manufacturing a solar cell module.
  • the solar cell module of the present invention is disposed between the light-receiving surface protective material, the back surface protective material, and the light-receiving surface protective material and the back surface protective material, and the solar cells are sealed with the solar cell sealing material sheet.
  • Layer Such a solar cell module is manufactured using a light receiving surface protective material such as a glass plate or transparent plastic, a solar cell encapsulant sheet, solar cells, and a solar cell encapsulant similar to the solar cell encapsulant sheet.
  • a sheet and a back sheet such as a fluororesin or a polyester resin, or a back surface protection material such as glass are laminated in this order, and the melted solar cell is sealed by applying pressure or pressure while heating by a vacuum heating lamination method or the like. It can be manufactured by embedding solar cells in a fixing material sheet and integrally molding them.
  • the layer in which the solar battery cells are sealed with the solar battery sealing material sheet is preferably a layer in which the solar battery cells are sealed from both sides with the solar battery sealing material sheet thus obtained.
  • the sealing material sheet of the present invention is excellent in the cushioning property and deaeration property of the sealing material sheet to the solar battery cell when the above-structured materials are laminated and integrated, the solar battery cell and the solar battery sealing material Since the residual stress at the time of molding is small and no bubbles remain in the encapsulant, the solar cell module has excellent long-term durability.
  • the measurement method used in this example is shown below.
  • Projection height H Select five points evenly in the width direction from both ends of the encapsulant sheet and apply a laser from the direction perpendicular to the sheet surface using a shape measurement laser microscope VK-X100 (manufactured by Keyence Corporation). Three-dimensional shape information was obtained. From there, the distance from the top to the bottom of the protrusion was determined, and the average value of the five points was defined as the height H of the protrusion of the encapsulant sheet.
  • Diameter D of circumscribed circle on the bottom of the protrusion Obtain shape information of 5 points in the width direction by the same method as in (1), obtain the diameter of the circle circumscribing the bottom surface of the projection from there, determine the average value of the five points of the circumscribed circle of the bottom surface of the projection of the encapsulant sheet Diameter D.
  • Protrusion top ratio X The shape information of 5 points in the width direction was obtained by the same method as in (1), the top ratio X of the projections was obtained therefrom, and the average value of the five points was taken as the top ratio X of the projections of the encapsulant sheet.
  • Vacuum lamination was performed under the conditions of 1 minute, press 1 minute, and pressure holding 10 minutes (total 15 minutes).
  • stacking it laminated
  • Example 1 EVA resin (vinyl acetate content: 28% by mass, melt flow rate: 15 g / 10 min (190 ° C.)), crosslinking agent, crosslinking aid, silane coupling agent, ultraviolet absorber, light stabilization
  • the agent was supplied to a twin screw extruder, melted and kneaded, and extruded from a T die to obtain an EVA sheet having a thickness of 450 ⁇ m.
  • This EVA sheet and an aluminum plate engraved with a concave pattern are heated on a hot plate at 85 ° C., and after the sheet temperature reaches 85 ° C., it is pressed at a surface pressure of 5 MPa for 5 seconds, and then a water-cooled manual cooling press machine Was quenched by pressing at a surface pressure of 1 MPa for 1 minute to obtain a sealing material sheet having surface protrusions.
  • the bottom portion of the projection of the sealing material sheet is square, the top ratio X is 0.25, the center of L P '/ L G of the protruding apex 0.90, the aspect ratio H / D is 0.30, the number of protrusions is 900 pieces / cm 2 , there is no uneven gloss, and no cell cracks and bubbles are generated even when cells having a thickness of 200 ⁇ m and thickness of 180 ⁇ m are used in the production of a solar cell module. It was a good sheet that could not be made.
  • Examples 2 to 17 Same as Example 1 except that the shape of the hem of the sheet protrusion, the apex ratio X, the centrality of the apex L P ′ / L G , the aspect ratio H / D, and the aluminum plate engraving was changed to change the number of protrusions
  • the sealing material sheet was obtained by this method, and gloss unevenness, cell cracks, and deaeration were evaluated.
  • Examples 18 to 20 Change the sculpture of the aluminum plate to change the shape of the hem of the sheet protrusion, the top ratio X, the centrality L P ′ / L G of the top, the aspect ratio H / D, the number of protrusions, and press time 1, 2, Except for pressing for 3 seconds, a sealing material sheet was obtained in the same manner as in Example 17, and gloss unevenness, cell cracks, and deaeration were evaluated.

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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)
PCT/JP2013/058477 2012-03-30 2013-03-25 太陽電池封止材シート、及び、太陽電池モジュール WO2013146629A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201380016918.9A CN104272468B (zh) 2012-03-30 2013-03-25 太阳能电池封装材薄片及太阳能电池模块
KR1020147025999A KR101559564B1 (ko) 2012-03-30 2013-03-25 태양 전지용 봉지재 시트 및 태양 전지 모듈
JP2013514428A JP6232627B2 (ja) 2012-03-30 2013-03-25 太陽電池封止材シート、及び、太陽電池モジュール

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-079379 2012-03-30
JP2012079379 2012-03-30

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Publication Number Publication Date
WO2013146629A1 true WO2013146629A1 (ja) 2013-10-03

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JP (1) JP6232627B2 (ko)
KR (1) KR101559564B1 (ko)
CN (1) CN104272468B (ko)
TW (1) TW201344936A (ko)
WO (1) WO2013146629A1 (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160017238A (ko) 2014-08-01 2016-02-16 도레이첨단소재 주식회사 태양전지용 봉지재 시트 및 그 제조방법

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9674087B2 (en) * 2013-09-15 2017-06-06 Nicira, Inc. Performing a multi-stage lookup to classify packets

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010232311A (ja) * 2009-03-26 2010-10-14 Sekisui Chem Co Ltd 太陽電池用封止シート
WO2010116628A1 (ja) * 2009-03-30 2010-10-14 リンテック株式会社 太陽電池モジュール用保護シート及び太陽電池モジュール並びに太陽電池モジュールの製造方法
JP2010258123A (ja) * 2009-04-23 2010-11-11 Inoac Gijutsu Kenkyusho:Kk 太陽電池封止材
JP2011119406A (ja) * 2009-12-02 2011-06-16 Asahi Kasei E-Materials Corp 太陽電池封止シートの製造方法及び太陽電池封止シート

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010232311A (ja) * 2009-03-26 2010-10-14 Sekisui Chem Co Ltd 太陽電池用封止シート
WO2010116628A1 (ja) * 2009-03-30 2010-10-14 リンテック株式会社 太陽電池モジュール用保護シート及び太陽電池モジュール並びに太陽電池モジュールの製造方法
JP2010258123A (ja) * 2009-04-23 2010-11-11 Inoac Gijutsu Kenkyusho:Kk 太陽電池封止材
JP2011119406A (ja) * 2009-12-02 2011-06-16 Asahi Kasei E-Materials Corp 太陽電池封止シートの製造方法及び太陽電池封止シート

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160017238A (ko) 2014-08-01 2016-02-16 도레이첨단소재 주식회사 태양전지용 봉지재 시트 및 그 제조방법

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CN104272468B (zh) 2016-08-24
JPWO2013146629A1 (ja) 2015-12-14
KR20140126387A (ko) 2014-10-30
TW201344936A (zh) 2013-11-01
CN104272468A (zh) 2015-01-07
JP6232627B2 (ja) 2017-11-22
KR101559564B1 (ko) 2015-10-12

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