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WO2019093327A1 - Module de batterie solaire et corps mobile - Google Patents

Module de batterie solaire et corps mobile Download PDF

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Publication number
WO2019093327A1
WO2019093327A1 PCT/JP2018/041185 JP2018041185W WO2019093327A1 WO 2019093327 A1 WO2019093327 A1 WO 2019093327A1 JP 2018041185 W JP2018041185 W JP 2018041185W WO 2019093327 A1 WO2019093327 A1 WO 2019093327A1
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WO
WIPO (PCT)
Prior art keywords
back side
solar cell
cell module
reinforcing material
sealing layer
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2018/041185
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English (en)
Japanese (ja)
Inventor
元彦 杉山
直樹 栗副
剛士 植田
善光 生駒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2019093327A1 publication Critical patent/WO2019093327A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S30/00—Structural details of PV modules other than those related to light conversion
    • 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 disclosure relates to a solar cell module and a mobile including the same.
  • Patent Document 1 describes that when the front side base material of the solar cell module is made of polyethylene terephthalate or polycarbonate which is a resin material, the solar cell module can be made excellent in durability, weather resistance, and transparency. It is done.
  • the following problem exists that is in a trade-off relationship. That is, when the linear expansion coefficient of the back side base material is smaller than the linear expansion coefficient of the front side resin base material, the solar cell accompanying the expansion and contraction of the solar cell sealing layer due to the temperature difference which occurs at the time of molding or use after molding The amount of movement of the cells is reduced, and the wiring material that electrically connects two adjacent solar cells can be less likely to be damaged.
  • the linear expansion coefficient of the back side substrate is smaller than the linear expansion coefficient of the front side resin base, the solar cell module is warped due to the difference between the linear expansion coefficients of the front side and the back side substrate. It is known that solar cells are easily damaged.
  • an object of the present disclosure is to provide a solar cell module capable of suppressing damage to both the solar cell and the wiring material, and a mobile body including the same.
  • the solar cell module includes a plurality of solar cells and a light receiving side seal provided on the light receiving side where light is mainly incident on the solar cells, and having a light transmitting property.
  • Layer a front side substrate provided on the light receiving side than the light receiving side sealing layer, and made of a translucent resin material, and a back side provided on the back side opposite to the light receiving side with respect to the solar battery cell
  • the light-receiving side sealing layer and the back side sealing layer may be formed of one integral layer, or may be formed of two or more different layers.
  • FIG. 1 is a schematic cross-sectional view showing a part of the cross-sectional view along the line AA in FIG. 1, and one X-direction end of the XZ cross-section including the X direction and the Z direction in the Y direction central part of the solar cell module It is a schematic cross section showing.
  • B is a schematic cross-sectional view taken along the line AA of FIG. It is a top view when the said solar cell module is seen from a back side.
  • FIG. 1 is sectional drawing corresponding to Fig.2 (a) in the solar cell module of another modification
  • (b) is a top view when the solar cell module is seen from the back side. It is sectional drawing corresponding to Fig.2 (a) in the solar cell module of the further modification.
  • the side on which sunlight is mainly incident is the light receiving side (front side), and the opposite side to the front side is the back side.
  • the resin material is a material in which the main component (the material having the largest weight%) is a resin, and may contain components other than the resin.
  • the X direction is the extension direction of the strings 60 described below
  • the Y direction is the alignment direction of the plurality of strings 60
  • the Z direction is the solar cell module 10 , 110, 210, 310, 410 in the thickness direction.
  • FIG. 1 is a perspective view of a solar cell module 10 according to an embodiment of the present disclosure as viewed from the light receiving side (front side).
  • FIG. 2A is a schematic cross-sectional view showing a part of the cross-sectional view along the line AA in FIG. 1, and X in the XZ cross-section including the X direction and the Z direction in the Y direction central portion of the solar cell module 10 It is a schematic cross section showing the direction one end.
  • 2 (b) is a schematic cross-sectional view taken along the line AA of FIG.
  • FIG. 2 (b) is a cross-sectional view produced to explain the arrangement position of the reinforcing material 7 with respect to the solar cell module 10 in an easily understandable manner.
  • FIG.2 (b) the relationship other than the thin material 7 with respect to the description is shown in figure integrally, illustration of the flame
  • the solar cell module 10 has a curved shape that is convex on the light receiving side, and curves in the X direction and also curves in the Y direction. More specifically, the solar cell module 10 has a biaxial bending shape included in a bending shape other than the uniaxial bending shape.
  • the uniaxially curved shape refers to a surface on one side in the thickness direction of the curved structure and a back surface on the other side in the thickness direction of the curved structure in a cut surface of the curved structure in a plane including one axis. Refers to a curved shape that appears as a pair of parallel lines (same definition as below).
  • the cylinder has a uniaxially curved shape, in which case the central axis of the cylinder is uniaxial.
  • the solar cell module 10 has a substantially rectangular shape in plan view.
  • the solar cell module 10 includes a terminal box 70 on one side and the back side in the X direction.
  • the solar cell module 10 is the solar cell 1 as a photoelectric conversion part, the front side base material 2 comprised by resin material, the back side base material 3, the wiring material 4, A resin sealing layer 5 composed of a resin material, a resin adhesive layer 6 functioning as an adhesive and composed of a resin material, a reinforcing material 7, a resin adhesive layer 9, and a frame 8 are provided.
  • the solar battery cell 1 is made of, for example, a crystalline semiconductor composed of single crystal silicon or polycrystalline silicon.
  • the solar battery cell 1 has, for example, an n-type region and a p-type region, and a junction for generating an electric field for carrier separation is provided at the interface between the n-type region and the p-type region.
  • the upper surface of the solar battery cell 1 has, for example, a substantially square shape, but is not limited thereto.
  • the solar battery 1 may have any known structure or any shape.
  • the front side base material 2 is provided on the light receiving side of the solar battery cell 1.
  • the front side base material 2 is a base material comprised with a translucent resin material, Preferably it is comprised with a transparent resin material.
  • the front surface and the back surface 2a, 2b of the front side base material 2 are arcs that are convex on the light receiving side.
  • each of the front and back surfaces 2a and 2b of the front side substrate 2 may have substantially the same curvature from one end to the other end in the X direction, and each of the front and back surfaces 2a and 2b of the front side substrate 2 May have a curved shape such that the radius of curvature gradually increases from the center to the end in the X direction.
  • the front and back surfaces 2a and 2b of the front side base material 2 are arcs convex toward the light receiving side also in the YZ cross section including the Y direction and the Z direction.
  • the front and back surfaces 2a and 2b of the front substrate 2 may have substantially the same curvature from one end to the other in the Y direction.
  • Each of 2b may have a curved shape such that the radius of curvature gradually increases from the center to the end in the Y direction.
  • the front side substrate 2 is made of, for example, polycarbonate (PC), polyethylene (PE), polypropylene (PP), cyclic polyolefin, polymethyl methacrylate (PMMA), polytetrafluoroethylene (PTFE), polystyrene (PS), polyethylene terephthalate (PET) And at least one selected from polyethylene naphthalate (PEN).
  • PC polycarbonate
  • PE polyethylene
  • PP polypropylene
  • PP cyclic polyolefin
  • PMMA polymethyl methacrylate
  • PTFE polytetrafluoroethylene
  • PS polystyrene
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • Polycarbonate is excellent in impact resistance and translucency. Therefore, the front side substrate 2 is particularly preferably a resin substrate having a polycarbonate as a main component, for example, a substrate having a polycarbonate content of 90% by weight or more, or 95% by weight to 100% by weight.
  • the back side substrate 3 is provided on the back side opposite to the light receiving side with respect to the solar battery cell 1.
  • the back side substrate 3 is made of a material whose linear expansion coefficient is smaller than that of the front side substrate 2.
  • the front surface and the back surface 3a, 3b of the back side substrate 3 are arcs that are convex on the light receiving side.
  • each of the front and back surfaces 3a and 3b of the back side substrate 3 may have substantially the same curvature from one end to the other end in the X direction, and each of the front and back surfaces 3a and 3b of the back side substrate 3 May have a curved shape such that the radius of curvature gradually increases from the center to the end in the X direction.
  • the front and back surfaces 3a and 3b of the back side substrate 3 are arcs convex toward the light receiving side also in the YZ cross section including the Y direction and the Z direction. Further, in the YZ cross section, the front surface and the back surface 3a, 3b of the back side substrate 3 may have substantially the same curvature from one end to the other end in the Y direction. Each of the above may have a curved shape in which the radius of curvature gradually increases from the center to the end in the Y direction.
  • the back side substrate 3 may be made of, for example, a base material made of a translucent resin material, or may be made of an opaque resin base material when light reception from the back side is not assumed.
  • the total light transmittance of the back side substrate 3 is not particularly limited, and may be 0%.
  • the back side substrate 3 is selected from, for example, cyclic polyolefin, polycarbonate (PC), polymethyl methacrylate (PMMA), polyetheretherketone (PEEK), polystyrene (PS), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN). Or at least one of the following.
  • the back side substrate 3 may be made of fiber reinforced plastic (FRP), and in particular, in applications where impact resistance and lightness are required, it is preferable to use FRP.
  • FRP fiber reinforced plastic
  • suitable FRP carbon fiber reinforced plastic (CFRP), glass fiber reinforced plastic (GFRP), aramid fiber reinforced plastic (AFRP) etc.
  • CFRP carbon fiber reinforced plastic
  • GFRP glass fiber reinforced plastic
  • AFRP aramid fiber reinforced plastic
  • polyester, a phenol resin, an epoxy resin etc. can be illustrated as a resin component which comprises FRP.
  • the back side substrate 3 may be made of glass or a metal such as aluminum.
  • the thickness of the back side substrate 3 is not particularly limited, but is preferably 5 ⁇ m or more.
  • the back side substrate 3 has, for example, a thickness equal to or greater than the thickness of one fiber.
  • the back side substrate 3 is preferably thin in consideration of protection of the solar battery cell 1, lightness, etc., and the back side substrate 3 has a thickness of 0.1 mm to 10 mm. It is preferable to have a thickness of 0.2 mm to 5 mm.
  • the back side base material 3 When the back side base material 3 is such thinness, weight reduction and thickness reduction (compactization) of the solar cell module 10 can be implement
  • the wiring material 4 is an electrode on the front side of one solar cell 1 in two solar cells 1 adjacent to each other in the X direction, and the back side of the other solar cell 1 Electrically connect with the electrode of The wiring member 4 is attached to each electrode with an adhesive or the like.
  • the wiring member 4 is preferably made of, for example, a thin copper foil and solder plated on the outer surface of the copper foil, but may be made of any other conductor.
  • the two solar battery cells 1 adjacent in the X direction are electrically connected by the three wiring members 4, but two adjacent solar cells 1 in the X direction
  • the solar cells may be electrically connected by any one or more wiring members.
  • resin sealing layer 5 is arranged between front side substrate 2 and back side substrate 3 so as to seal solar battery cell 1 and wiring member 4.
  • the light reception side sealing layer and the back side sealing layer are comprised by one integral resin sealing layer 5.
  • the resin sealing layer 5 is preferably made of, for example, polyolefin, ethylene vinyl acetate copolymer (EVA), polyvinyl butyral, ionomer, epoxy resin, alicyclic epoxy resin, or the like because it is easy to ensure sufficient weather resistance.
  • the resin sealing layer 5 may be made of a resin material other than these.
  • the resin sealing layer 5 is preferably made of a material excellent in light transmittance, and preferably made of a transparent filler.
  • the resin sealing layer 5 preferably has a high total light transmittance, and the total light transmittance of the resin sealing layer 5 is, for example, 80% to 100% as measured in accordance with JIS K 7361-1 (1997). Or 85% to 95%.
  • the light reception side sealing layer and the back side sealing layer were comprised by the one same resin sealing layer 5.
  • the light receiving side sealing layer and the back side sealing layer may be formed of different resin layers, and the light receiving side sealing layer is disposed between the front side substrate and the solar cell, and the back side sealing is performed.
  • a layer may be disposed between the solar cell and the back side substrate.
  • a light receiving side sealing layer and a back side sealing layer may be bonded together.
  • the light receiving side sealing layer is preferably made of the same material as the resin sealing layer 5 described above.
  • the back side sealing layer is made of polyolefin, ethylene vinyl acetate copolymer (EVA), polyvinyl butyral, ionomer, epoxy resin, alicyclic epoxy resin or the like, sufficient weather resistance can be secured, which is preferable.
  • the back side sealing layer may be made of other resins.
  • the backside sealing layer may have any total light transmittance.
  • the back side sealing layer may contain a coloring material such as a white pigment or a black pigment, and the total light transmittance may be 0%.
  • the light-receiving side sealing layer may be formed of a transparent filler, and the back side sealing layer may be formed of a white filler that efficiently reflects light. It is possible to improve the utilization efficiency of
  • the resin adhesive layer 6 is disposed between the resin sealing layer 5 and the reinforcing material 7 and plays a role of bonding the resin sealing layer 5 and the reinforcing material 7.
  • the resin adhesive layer 6 can be made of, for example, an adhesive thermosetting resin material such as an epoxy resin, an acrylic resin, a urethane resin, or a silicone resin.
  • the solid component is mixed with an epoxy resin to which a curing agent is added. It is preferable to be made of a resin or the like in the form of a paste.
  • the resin adhesive layer 6 is disposed between the resin sealing layer 5 and the reinforcing material 7 and may be made of any resin material as long as the resin sealing layer 5 and the reinforcing material 7 can be bonded. It is also good.
  • the reinforcing material 7 is disposed on the back side of the solar cell module 10 and includes a surface 7 a facing in the Z direction on at least a part of the peripheral portion of the back surface 3 b of the back side base material 3.
  • the reinforcing material 7 is made of a resin material or a metal material.
  • the reinforcing member 7 is provided to reinforce the solar cell module 10, and may be made of any material as long as it has a predetermined rigidity. When the rigidity of the constituent material of the reinforcing material 7 is low, the thickness in the Z direction is large, and when the rigidity of the constituent material is high, the thickness in the Z direction is small.
  • the thickness in the Z direction is large, and when it is made of a metal material having a high elastic modulus, the thickness in the Z direction is small.
  • the reinforcing material 7 is made of a metal material, iron or aluminum is preferably used as the metal material, and when the reinforcing material 7 is made of a resin material, polyphenylene sulfide (PPS) or polyetheretherketone (PEEK) as a resin material
  • PPS polyphenylene sulfide
  • PEEK polyetheretherketone
  • FRP fiber reinforced plastic
  • the reinforcing material 7 has the thickness increase part 7b which thickness increases gradually as it goes to the peripheral part side from the center part side of the solar cell module 10.
  • FIG. 3 is a plan view when the solar cell module 10 is viewed from the back side.
  • the reinforcing material 7 is annular, and is disposed on the back surface 80 of the solar cell module 10 so as to cover the peripheral portion excluding the frame 8. It may have a frame shape.
  • the frame 8 may have a joint 90 at the corner. Also, unlike the example shown in FIG.
  • the thickness-increasing portion is provided so as to gradually increase in thickness from the central portion to the peripheral portion side
  • the reinforcing material is provided on the back surface of the solar cell module It may be arranged to cover the entire surface of the back side excluding the frame.
  • a reinforcing material may be arranged so that it may overlap with all of a plurality of photovoltaic cells.
  • the reinforcing material 7 contains the outer side part 7c arrange
  • the reinforcing member 7 is provided with a step 7 d on the back side.
  • the reinforcing member 7 has a flat surface 7e configured as a flat surface on the peripheral side of the step 7d, and the flat surface 7e is connected to the end of the step 7d on the front side base 2 side.
  • the frame 8 is attached to an edge portion of the main body portion 15 which is configured by a portion other than the frame 8 in the solar cell module 10 and surrounds the edge portion.
  • the frame 8 is attached to the main body portion 15 by an attachment means such as an adhesive after the main body portion 15 is integrated by lamination processing described in detail later.
  • the frame 8 At the X direction end of the XZ sectional view shown in FIG. 2 (a), the frame 8 has an L shape and extends in the Z direction to cover the side surface of the main body portion 15; It has the positioning part 8b which protrudes in a X direction.
  • Positioning portion 8 b includes a flat surface 8 c opposite to flat surface 7 e of reinforcing member 7 in the Z direction.
  • thermoplastic materials such as polycarbonate, vinyl chloride, polyester, and ABS resin
  • thermosetting materials such as phenol resin and polyurethane
  • rubber materials such as nitrile rubber
  • a metal material such as aluminum or steel can be used.
  • the resin adhesive layer 9 is a resin adhesive layer formed between the flat surface 7 e of the reinforcing material 7 and the flat surface 8 c of the frame 8 when the attachment means for attaching the frame 8 to the main body 15 is an adhesive. is there.
  • the resin adhesive layer 9 can be made of, for example, an adhesive thermosetting resin material such as an epoxy resin, an acrylic resin, a urethane resin, or a silicone resin, and for example, a solid component is mixed with an epoxy resin to which a curing agent is added. It is preferable to be made of a resin or the like in the form of a paste.
  • the resin adhesive layer 9 may be made of any resin material as long as it is disposed between the frame 8 and the reinforcing material 7 and can bond the frame 8 and the reinforcing material 7.
  • an attachment means may be a welding part, and a reinforcement and a flame
  • the front side substrate 2, the resin sealing layer 5, the solar battery cell 1 and the wiring member 4, the resin adhesive layer 6, the back side substrate 3 and the reinforcing material 7 are attached to each other, for example, by vacuum lamination described below. Integrated. Vacuum lamination is performed, for example, at a temperature of about 100 to 160 ° C. under high vacuum.
  • a curved base side substrate base material which is a base material of the front base material 2
  • a curved back side base substrate raw material which is a base material of the rear side base 3
  • a reinforcing material Prepare a reinforcing material base material which is a base material of 7.
  • These front side base material, back side base material, and reinforcing material base are formed by, for example, injection molding.
  • a laminated structure in which a front side sheet material constituting the front side portion, an adhesive base material of the resin adhesive layer 6, a front base material base material, and a reinforcing base material are laminated in this order is a pair of silicone rubbers of a vacuum laminating apparatus. Place between (diaphragms). Then, for example, while evacuating air in the laminated structure to the outside by vacuum suction, compressed air expands one or both silicon rubbers to press the laminated structure in the thickness direction. Further, in addition to the evacuation and pressurization, the laminated structure is heated at a temperature of, for example, about 100 to 160 ° C. by a heater of a vacuum laminating apparatus.
  • the back side sheet material, the front side sheet material, and the adhesive base material are melted, and the front side sheet and the back side sheet material are fused so as to seal the solar battery cell 1 and the wiring member 4.
  • the back side sheet material and the back side base material base material are adhered, the back side base material base material and the adhesive base material are adhered, the adhesive base material and the reinforcing base material are bonded, and the front side sheet material and the front side base base material Glue the material.
  • the laminated structure is integrated in a shape corresponding to the product.
  • the pair of silicone rubbers are inflated with compressed air to press the laminated structure in the thickness direction has been described.
  • the pair of rubber plates is moved by pressure using hydraulic pressure or the like so that the distance between the pair of rubber plates is decreased, and the laminated structure disposed between the pair of rubber plates is compressed. It is also good.
  • the plurality of solar cells 1 are arranged in a matrix in the solar cell module 10. Two or more solar cells 1 arranged on the same straight line along the X direction are connected in series by the wiring member 4. The two or more solar battery cells 1 and the wiring member 4 connecting the two or more solar battery cells 1 in series constitute a string 60.
  • the solar cells 1 at one end in the X direction are connected in series by the relay wiring 30, and all the solar cells 1 are connected in series. Ru.
  • the solar battery cell 1a disposed closest to the terminal box 70 in the X direction and on the right side in the drawing is disposed on the highest potential side, and disposed on the terminal box 70 side in the X direction and the leftmost on the drawing
  • the solar battery cell 1b to be provided is disposed at the lowest potential side.
  • the solar battery cells disposed closest to the terminal box in the X direction and on the right side in the drawing are disposed on the lowest potential side, and the terminal box side in the X direction and the most on the drawing
  • the photovoltaic cell disposed on the left side may be disposed on the highest potential side.
  • the solar cell module 10 includes, on the side of the terminal box 70 in the X direction, four output wirings 30a, 30b, 30c, and 30d for electrically connecting to the terminals of the terminal box 70.
  • the outer peripheral surface of each of the output wires 30a, 30b, 30c, and 30d is covered with an insulating member such as an insulating film.
  • Two of the four output wirings 30a, 30b, 30c, and 30d also have a function of connecting two adjacent strings 60 in series.
  • the output wiring 30 a is electrically connected to the high potential side of the string 60 disposed on the rightmost side in the Y direction and located on the highest potential side.
  • the output wiring 30b is disposed in the second column from the right in the Y direction, and disposed on the lowest potential side solar battery cell 1 of the string 60 of the second highest potential, and disposed in the third column from the right in the Y direction. It electrically connects with the solar cell 1 of the highest electric potential side of the string 60 of the 3rd highest electric potential.
  • the output wiring 30c is disposed in the fourth column from the right in the Y direction, and disposed on the lowest potential side solar battery cell 1 of the string 60 of the fourth highest potential, and in the fifth column from the right in the Y direction. It is provided and electrically connected to the solar cell 1 on the highest potential side of the fifth highest potential string 60.
  • the output wiring 30d is disposed in the sixth column from the right in the Y direction, and is electrically connected to the lowest potential side of the lowest potential string 60.
  • the back side substrate 3, the resin adhesive layer 6, and the reinforcing material 7 have a plurality of through holes (not shown) penetrating the three portions 3, 6, 7 thereof.
  • Each of the output wirings 30a, 30b, 30c, and 30d is electrically connected to a predetermined terminal of the terminal box 70 after passing through any of the through holes.
  • a bypass diode for backflow prevention is provided between the terminals in the terminal box 70.
  • the solar cell module 10 has the string 60 arrange
  • FIG. 4 is a diagram showing computer simulation results of shape change caused by a large temperature difference in a three-layer laminated structure including front and back substrates having different linear expansion coefficients. The simulation was performed on a laminated structure having a bowl-shaped curved shape and a flat laminated structure, which is a curved shape that is neither a uniaxial curved shape nor a biaxial curved shape shown in FIG. 5.
  • the simulation has a structure in which polycarbonate 1 mm, ethylene vinyl acetate copolymer (EVA) 1.2 mm, and carbon fiber reinforced plastic (CFRP) 2 mm are laminated in this order from the front side to the back side, and has a curvature radius of 5000 mm.
  • EVA ethylene vinyl acetate copolymer
  • CFRP carbon fiber reinforced plastic
  • the simulation was performed on a sample in which the reinforcing material is not joined to the laminated structure 80 and a sample in which an annular reinforcing material is joined to the peripheral portion on the back side of the laminated structure 80 when the laminated structure 80 has a bowl shape.
  • the simulation was performed under the condition that the temperature was lowered from 120 ° C. to 20 ° C. with respect to the laminated structure 80.
  • the simulation simulates the deformation of the laminated structure when the laminated structure that has reached a high temperature during lamination molding is cooled and the temperature is reduced.
  • the laminated structure 80 polycarbonate having a linear expansion coefficient of 70 ppm was used, and CFRP having a linear expansion coefficient of 7 ppm was used.
  • FIG. 4 (a) shows the simulation result for the bowl-shaped laminated structure 80
  • FIG. 4 (b) shows the simulation result for the flat laminated structure 80.
  • P1 shows the center of the laminated structure 80 which has a bowl-shaped curved shape
  • P2 shows the center of the laminated structure 80 which has a flat plate-shaped curved shape.
  • the sample of the laminated structure 80 (without the reinforcing material) is shown in the enlarged cross-sectional view of the peripheral region R1 of the half sectional view of the laminated structure 80 in a state of decreasing from 120 ° C. to 20 ° C.
  • the peripheral portion (edge portion) is warped in the direction in which the radius of curvature is increased to the state shown from ⁇ 1 to ⁇ 2.
  • FIG. 4B in the sample of the flat plate-like laminated structure 80, in a state where the temperature is lowered from 120 ° C. to 20 ° C. It was deformed into a curved shape.
  • FIG. 4A the sample of the laminated structure 80 (without the reinforcing material) is shown in the enlarged cross-sectional view of the peripheral region R1 of the half sectional view of the laminated structure 80 in a state of decreasing from 120 ° C. to 20 ° C.
  • the peripheral portion (edge portion) is warped in the direction in which the radius of curvature is increased to the state shown from
  • FIG. 6 shows the above three layers (polycarbonate (linear expansion coefficient 70 ppm) 1 mm, ethylene vinyl acetate copolymer 1.2 mm, and carbon fiber reinforced plastic (linear expansion coefficient) when reduced from high temperature to low temperature confirmed by simulation
  • FIG. 6A is a schematic cross-sectional view showing the deformation of the flat plate-shaped laminated structure.
  • FIG. 6B is a schematic cross-sectional view showing the deformation of the laminated structure of the uniaxially curved shape convex upward.
  • FIG.6 (c) is a schematic cross section showing the deformation
  • the flat plate-shaped laminated structure is deformed into a downwardly convex curved shape, and the uniaxially curved laminated structure is entirely curved. Transform to become smaller.
  • the laminated structure of the biaxially curved shape is deformed such that the peripheral portion (edge) is warped.
  • the laminated structure 80 (without the reinforcing material) shown in FIG. 4A the laminated structure of the upwardly convex curved shape not included in the uniaxial and biaxial curved shapes is also a biaxial curved shape In the same way, the peripheral part (edge) is deformed to warp.
  • the simulation was also performed on a laminate in which a reinforcing material was joined to the annular peripheral portion of the back surface of the carbon fiber reinforced plastic in each laminate. According to the result, when the reinforcing material is joined, the deformation of each laminate can be suppressed.
  • the biaxially curved laminated structure in which warping was observed in the peripheral portion at the time of temperature drop, deformation was significantly suppressed as in the simulation result of the sample of laminated structure 80 (with a reinforcing material) of FIG. It was confirmed that it was possible. Therefore, in the case of a curved shape that is upwardly convex and is not a uniaxially curved shape, deformation of the laminated structure can be significantly suppressed if the reinforcing material is joined to the peripheral portion on the back side.
  • the solar cell module 10 is provided in the light reception side which light mainly injects with respect to the several photovoltaic cell 1 and the photovoltaic cell 1, and the light reception side sealing layer (resin sealing layer which has translucency) (A part of the front side of 5).
  • the solar cell module 10 is provided on the light receiving side relative to the light receiving side sealing layer, and is opposite to the light receiving side with respect to the solar battery cell 1 and the front side base material 2 made of a translucent resin material. It has a back side sealing layer (another part of the resin sealing layer 5) provided on the back side of the side.
  • the solar cell module 10 includes the back side substrate 3 which is provided on the back side of the back side sealing layer and is made of a material having a linear expansion coefficient lower than that of the front side substrate 2.
  • the solar cell module 10 includes the surface 7 a facing to at least a part of the peripheral portion of the back surface 3 b on the back side of the back side substrate 3 via a member (resin adhesive layer 6) The reinforcement 7 provided is provided.
  • the moving amount of the solar battery cell 1 based on the temperature difference which arises at the time of molding or use after molding can be made small. Damage to the wiring member 4 that electrically connects the two solar cells 1 can be suppressed.
  • the reinforcing material 7 may include a thickness increasing portion 7 b whose thickness gradually increases from the central portion side to the peripheral portion side.
  • the peripheral portion is most warped due to temperature change, but the central portion is also warped, and the warp becomes larger as it goes to the peripheral portion.
  • the thickness of the reinforcing material 7 can be increased in accordance with the degree to which the warping occurs. Therefore, the reinforcing material 7 can be configured to be thin as a whole, and both weight reduction and warpage suppression can be achieved.
  • the reinforcing material 107 does not overlap the solar cell module 110 when viewed from the thickness direction of the solar cell module 110. It is assumed that it is provided only at the peripheral position.
  • the solar cell module 110 when the solar cell module 110 receives an external force (impact) shown by the arrow B from the outside, the first portion 110a overlapping in the thickness direction with the reinforcing member 107 in the solar cell module 110 has large rigidity and deformation is suppressed. Ru.
  • the second portion 110b which does not overlap the reinforcing member 107 in the thickness direction tends to be deformed downward in the drawing by the external force.
  • a large shear stress indicated by arrow C acts on the solar battery cell 101 not overlapping the reinforcing material 107 in the thickness direction in the solar battery module 110, and the solar battery cell 1 is easily damaged. Therefore, in the case of the other embodiment shown in FIG.
  • the thickness increasing portion 7 b can support the back side of at least a part of the plurality of solar cells 1. Therefore, the shear stress which acts on one or more solar cells 1 can be suppressed, and damage to one or more solar cells 1 can be suppressed.
  • the reinforcing material 7 includes a thickness increasing portion 7 b whose thickness gradually increases from the central portion side toward the peripheral portion side.
  • the thickness of the reinforcing material 7 also decreases. Therefore, damage to the solar cell can be efficiently suppressed while reducing the material cost of the reinforcing material 7.
  • the solar cell module 10 may have a curved shape that is convex on the light receiving side.
  • the curved shape may be a curved shape other than the uniaxial curved shape, instead of the uniaxial curved shape in which a pair of parallel lines appear on a cut surface in a plane including the single axis.
  • the warpage is reduced as the thickness of the solar cell module is increased, but the warpage is less likely to be zero.
  • the solar cell module 10 has a curved shape other than the uniaxial curved shape including the biaxial curved shape, the peripheral portion is inside the peripheral portion (edge) when the thickness of the solar cell module becomes a certain value or more. An internal force is generated to cause the warping of the peripheral portion.
  • the solar cell module 10 has a biaxially curved shape in which the peripheral portion (edge) is warped due to a temperature difference.
  • the reinforcing material 7 when viewed from the thickness direction of the front side base material 2, at least a part of the reinforcing material 7 may overlap at least a part of the plurality of solar cells 1.
  • the reinforcing material 7 may include an outer portion 7 c disposed around the plurality of solar cells 1.
  • the solar cell module 10 has a biaxially curved surface, the curvature of the solar cell 1 resulting from a temperature change can be effectively suppressed by the outer side part 7c arrange
  • the solar cell module 10 may be provided with the step 7 d on the back side and may have a flat surface 7 e configured as a plane on the peripheral side of the step 7 d.
  • the flat surface 7e is provided on the peripheral side of the step 7d. Therefore, it becomes easy to provide the part arrange
  • the reinforcing material 7 may be annular and have a frame shape along the peripheral portion of the back surface 80 of the solar cell module 10.
  • the warpage of the solar cell module 10 can be effectively suppressed while reducing the material cost.
  • the solar cell module 210,310,410 of the modification shown in the following FIG.8, FIG.9, FIG.10 also has the biaxially-curved shape similarly to the solar cell module 10 shown in FIG. It is a solar cell module.
  • the same reference number is attached
  • reference numeral 206 denotes a resin adhesive layer
  • reference numeral 309 denotes a resin adhesive layer
  • reference numerals 406 and 409 are resin adhesive layers different from each other
  • reference numeral 408 is a frame. The description of these configurations is omitted.
  • the flat surface 7 e for positioning the frame 8 is provided on the back side of the reinforcing material 7.
  • a flat surface 203 a for positioning the frame 208 is provided on the peripheral portion of the back side substrate 203. It is also good.
  • the flat surface 203 a may be attached to the flat surface 208 a of the frame 208 opposed to the flat surface 203 a in the Z direction by the resin adhesive layer 209.
  • the step portion 207a provided on the center side of the flat surface 203a may be included in the side surface (end surface) on the peripheral side of the reinforcing member 207.
  • the back side base material is a sheet-like base material or the rigidity is low
  • the rigidity of the back side substrate 203 is high, it is better to provide the flat surface 203a on the back side substrate 203 as in the modification shown in FIG. 8, and in this case, material cost reduction and downsizing are realized.
  • the solar cell module may not have a flat surface for positioning the frame on the back side of the peripheral portion, unlike the modification shown in the above embodiment and FIG. 8.
  • the reinforcing material 7 has the thickness increase part 7b which thickness increases gradually as it goes to the peripheral part side from the center part side of the solar cell module 10 was demonstrated. Moreover, the case where the reinforcing material 7 was attached to the back side base material 3 using the resin adhesive layer 6 was demonstrated.
  • the reinforcing material 307 goes from the central side to the peripheral side. Therefore, it is not necessary to have a thickness increasing portion whose thickness gradually increases. Then, as shown in FIG.
  • the reinforcing material 307 is annular and extends along the periphery of the back surface 380 of the solar cell module 310. It may have a frame shape. Further, as shown in FIG. 9A, when the back side base material 303 and the reinforcing material 307 are made of a material that can be adhered at the time of lamination, the reinforcing material 307 can be used as the back side base without interposing the resin adhesive layer. The back side of the material 303 may be arranged to be in contact with the back side substrate 303. Even in this case, as shown in FIG. 9B, the frame 308 may have a joint 390 at the corner.
  • the material cost of the resin adhesive layer can be made zero. Reduction of the material cost of 307 and downsizing can also be realized.
  • the reinforcing material 407 is annular, and the back surface 480 of the solar cell module 410 is It may have a frame shape along the periphery.
  • the side surfaces 411 and 412 of the reinforcing material 407 may be a wide-spreading surface that moves to the outside of the reinforcing material 407 as it goes to the back side base material 403 side.
  • the side surfaces 411 and 412 of the reinforcing member 407 are divergent surfaces, the silicon rubber (diaphragm) of the vacuum laminating apparatus can be easily made to follow the side surfaces 411 and 412 at the time of laminating. Therefore, the force can be uniformly transmitted to the laminated structure, and the laminated structure can be formed beautifully.
  • the solar cell module 10 may have a flat plate shape, a uniaxial curved shape, or a curved shape that is neither a uniaxial curved shape nor a biaxial curved shape.
  • the back side substrate, the resin adhesive layer, and the reinforcing material may be made of the same material (for example, a resin material or the like) If one back side base material is made into one by comprising metal materials, the number of manufacturing processes can be reduced, and the manufacturing cost can be reduced. Also, in that case, in the back side substrate after integration, when viewed from the thickness direction of the solar cell module, a portion of the thickness corresponding to the reinforcing material before integration (before integration) is a plurality of solar cells When overlapping at least a part of the cell, it is possible to reduce the shear stress acting on the solar cell and to suppress damage to the solar cell, which is preferable.
  • the solar cell module of this indication does not need to be mounted in a mobile, it is preferable when mounted in a mobile. That is, the mobile unit of the present embodiment is a mobile unit including the solar cell module of the above-described present embodiment.
  • vehicles such as a motor vehicle, a train, or a ship etc. are mentioned, for example.
  • the solar cell module of the present embodiment is mounted on a car, it is preferable to be installed on the upper surface portion of the car body such as a bonnet or a roof.
  • the current obtained by the power generation by the solar cell module of the present embodiment is supplied to an electric device such as a fan or a motor and used for driving and controlling the electric device.

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  • Photovoltaic Devices (AREA)

Abstract

Cette invention concerne un module de batterie solaire (10), comprenant : une couche d'étanchéité côté réception de lumière qui transmet la lumière et qui est disposée sur le côté de réception de lumière d'une cellule de batterie solaire (1) ; un matériau de base côté avant (2) qui est formé à partir d'un matériau de résine transmettant la lumière et qui est disposé plus loin sur le côté de réception de lumière que la couche d'étanchéité côté réception de lumière ; une couche d'étanchéité côté arrière qui est disposée sur le côté arrière opposé au côté de réception de lumière de la cellule de batterie solaire (1) ; un matériau de base côté arrière (3) qui est disposé plus loin sur le côté arrière que la couche d'étanchéité côté arrière et qui est formé à partir d'un matériau ayant un coefficient de dilatation linéaire inférieur à celui du matériau de base côté avant (2) ; et un matériau de renforcement (7) qui est disposé sur le côté arrière du matériau de base de côté arrière (3) et qui comprend une surface (7a) en contact avec ou à l'opposé d'au moins une partie d'une section périphérique d'une surface arrière sur le côté arrière du matériau de base côté arrière (3), avec un élément entre celles-ci. Cette configuration facilite la prévention d'endommagement de la cellule de batterie solaire (1) ainsi que d'un matériau de câblage (4).
PCT/JP2018/041185 2017-11-13 2018-11-06 Module de batterie solaire et corps mobile Ceased WO2019093327A1 (fr)

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JP2017-218427 2017-11-13
JP2017218427 2017-11-13

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WO2019093327A1 true WO2019093327A1 (fr) 2019-05-16

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011238761A (ja) * 2010-05-10 2011-11-24 Sharp Corp 太陽電池モジュール
WO2013161757A1 (fr) * 2012-04-23 2013-10-31 三菱電機株式会社 Cadre de support et module de cellule solaire
JP2015005646A (ja) * 2013-06-21 2015-01-08 三井化学株式会社 太陽電池封止用シートセットおよびそれを用いた太陽電池モジュール
JP2015195253A (ja) * 2014-03-31 2015-11-05 シャープ株式会社 太陽電池モジュール
JP2016096214A (ja) * 2014-11-13 2016-05-26 トヨタ自動車株式会社 太陽電池モジュール
JP2017092067A (ja) * 2015-11-02 2017-05-25 株式会社豊田自動織機 太陽電池モジュール、その実装構造、これを含む車両、および、太陽電池モジュールの製造方法
JP2017092073A (ja) * 2015-11-02 2017-05-25 トヨタ自動車株式会社 太陽電池モジュール

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011238761A (ja) * 2010-05-10 2011-11-24 Sharp Corp 太陽電池モジュール
WO2013161757A1 (fr) * 2012-04-23 2013-10-31 三菱電機株式会社 Cadre de support et module de cellule solaire
JP2015005646A (ja) * 2013-06-21 2015-01-08 三井化学株式会社 太陽電池封止用シートセットおよびそれを用いた太陽電池モジュール
JP2015195253A (ja) * 2014-03-31 2015-11-05 シャープ株式会社 太陽電池モジュール
JP2016096214A (ja) * 2014-11-13 2016-05-26 トヨタ自動車株式会社 太陽電池モジュール
JP2017092067A (ja) * 2015-11-02 2017-05-25 株式会社豊田自動織機 太陽電池モジュール、その実装構造、これを含む車両、および、太陽電池モジュールの製造方法
JP2017092073A (ja) * 2015-11-02 2017-05-25 トヨタ自動車株式会社 太陽電池モジュール

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