WO2012014680A1 - Module de cellules solaires et son procédé de fabrication - Google Patents

Module de cellules solaires et son procédé de fabrication Download PDF

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Publication number
WO2012014680A1
WO2012014680A1 PCT/JP2011/065990 JP2011065990W WO2012014680A1 WO 2012014680 A1 WO2012014680 A1 WO 2012014680A1 JP 2011065990 W JP2011065990 W JP 2011065990W WO 2012014680 A1 WO2012014680 A1 WO 2012014680A1
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WIPO (PCT)
Prior art keywords
solar cell
output lead
sealing member
lead wire
cell module
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PCT/JP2011/065990
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English (en)
Japanese (ja)
Inventor
濱田　哲也
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シャープ株式会社
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Publication of WO2012014680A1 publication Critical patent/WO2012014680A1/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
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • 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
    • H01L31/02—Details
    • H01L31/02002—Arrangements for conducting electric current to or from the device in operations
    • H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
    • H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
    • H01L31/02013—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising output lead wires elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the present invention relates to a solar cell module and a manufacturing method thereof.
  • the power generation efficiency of the solar cell module is obtained by dividing the power generation amount by the outer dimensions, the reduction of the area that does not contribute to power generation is a major factor for realizing a more efficient solar cell module.
  • the ratio of the area of the non-power generation area to the area of the power generation area must be increased, and in order to achieve high power generation efficiency, Reducing the area of non-power generation areas has become an important issue.
  • FIG. 7 is a perspective view showing a surface state in which the first output lead wire and the second output lead wire are drawn out to the surface side of the solar cell module according to the conventional example.
  • a solar cell module 101 having a structure in which a plurality of solar cells 110 are connected by an interconnector 130, a first output lead 115 is connected to one terminal, and a second output lead 125 is connected to the other terminal. It is known (see, for example, Patent Document 1).
  • the wires are crushed by the interconnection lead wires (interconnector 130) and the output lead wires (first output lead wire 115, second output lead wire 125) that connect the cells to each other.
  • a technique for reducing the non-power generation region by reducing the bending radius by using the formed wire is disclosed.
  • an output lead wire (first output lead wire 115, second output lead wire 125) is an interconnection lead wire (interconnector 130) connected to the solar battery cell 110. )
  • this connection region is a non-power generation region.
  • the stranded wire has a deformable characteristic, but it takes a lot of time for molding, and it is difficult to maintain the shape, so that it is difficult to manufacture while maintaining a certain quality.
  • Another object of the present invention is to provide a solar cell module capable of reducing the non-power generation area in the surface layout and improving the power generation efficiency.
  • Another object of the present invention is to provide a manufacturing method for manufacturing the above-described solar cell module.
  • a solar cell module includes a solar cell row in which a first solar cell and a second solar cell having a back electrode on at least a back surface are connected in series via an interconnector, and a surface of the solar cell row A translucent substrate disposed on the side, a protective member disposed on the back side of the solar cell array, and disposed between the translucent substrate and the protective member to seal the solar cell array.
  • a light-transmitting sealing member that stops, and includes a first output lead wire that is connected to a back electrode of the first solar battery cell and outputs electric power to the outside, and the first output lead The line is characterized by being extended toward the second solar cell and taken out from an opening formed in the protective member.
  • the opening may be provided at a position facing the back surface of the first solar cell.
  • the first output lead wire is bent with respect to the extension direction of the interconnector, and is spaced from the interconnector in a plan view with respect to the back surface of the solar cell array. It may be arranged.
  • the translucent substrate includes a first end side and a second end side arranged on the opposite side away from the first end side, and the first end side.
  • the solar cell may be disposed on the first end side, and the second solar cell may be disposed on the second end side.
  • the first end side and the second end side are parallel to each other, and the first output lead wire is extended in a direction intersecting the first end side. May be. *
  • the solar cell module according to the present invention further includes a second output lead wire that forms a pair with the first output lead wire and outputs electric power to the outside, and the second output lead wire is an end surface of the sealing member. May have been taken out of.
  • the manufacturing method of the solar cell module which concerns on this invention is the solar cell row
  • the said solar A translucent substrate disposed on the front surface side of the battery cell array; a protection member disposed on the back surface side of the solar cell array; and the sun disposed between the translucent substrate and the protection member.
  • the first output lead wire includes: A method of manufacturing a solar cell module that extends toward the second solar cell and is taken out from an opening formed in the protective member, the translucent substrate, the sealing member, The first output lead wire The 1st process which piles up the said photovoltaic cell row
  • a flat plate is arranged between the first output lead wire taken out to the outside and the protective member so as to cover a position facing the portion of the interconnector between the solar battery cell and the second solar battery cell. And a process.
  • the present invention it is not necessary to provide a connection region for connecting the output lead wire with the solar cell at the end of the solar cell, so that the non-power generation region in the surface layout is reduced and the power generation efficiency is improved. And a method for manufacturing the solar cell module can be provided.
  • the first output lead wire is connected to the back electrode of the first solar cell, and the second solar cell
  • the translucent substrate and the surface side sealing member is a schematic process diagram showing a cross-sectional view of a process of preparing a seal by sequentially stacking solar cell rows.
  • FIG. 3 In the manufacturing method of the solar cell module which concerns on Embodiment 3 of this invention, it is a schematic process drawing which shows the planar state of the back surface side sealing member (sealing member) prepared in order to overlap on the back surface of a photovoltaic cell row
  • the schematic process which shows in cross section the process which piled up the back surface side sealing member (sealing member) on the back surface of the photovoltaic cell row
  • FIG. 1 The manufacturing method of the solar cell module which concerns on Embodiment 3 of this invention.
  • WHEREIN The model which shows in cross section the process which accumulated the protective member on the back surface side sealing member (sealing member) of the photovoltaic cell row
  • a translucent substrate In the method for manufacturing a solar cell module according to Embodiment 3 of the present invention, a translucent substrate, a sealing member (front surface side sealing member), a solar cell array, a sealing member (back surface side sealing member), and It is a schematic process diagram which shows in cross section the process of mounting the solar cell module in a state where the protective members are stacked on a processing apparatus that performs a heating / pressurizing process.
  • a translucent substrate In the method for manufacturing a solar cell module according to Embodiment 3 of the present invention, a translucent substrate, a sealing member (front surface side sealing member), a solar cell array, a sealing member (back surface side sealing member), and It is a model process figure which shows the cross-sectional state of the solar cell module after performing the heating and pressurizing process with respect to a protection member. It is a top view which shows the back surface state of the solar cell module shown to FIG. 4A. It is a conceptual sectional view of a solar cell module shown as a comparative example in order to explain the operation and effect of the present invention (Embodiment 1 to Embodiment 3). It is a top view which shows the surface state of the solar cell module which concerns on Embodiment 4 of this invention.
  • FIG. 6B is a cross-sectional view showing a cross-sectional state of the solar cell module shown in FIG. 6A at arrows BB. It is a top view which shows the back surface state of the solar cell module shown to FIG. 6A. It is a perspective view which shows the surface state which pulled out the 1st output lead wire and the 2nd output lead wire to the surface side of the solar cell module which concerns on a prior art example.
  • FIG. 1A is a cross-sectional view showing a cross-sectional state at a position including interconnector 30 and first output lead wire 15 of solar cell module 1 according to Embodiment 1 of the present invention.
  • FIG. 1B is a plan view showing a back surface state of the solar cell module 1 shown in FIG. 1A.
  • the first solar cell 10 and the second solar cell 20 are connected in series via the interconnector 30.
  • the first solar cell 10 and the second solar cell 20 have at least a back electrode (a back electrode formed on the back surface 10r) on the back surface (the back surface 10r of the first solar cell 10, the back surface 20r of the second solar cell 20). 12, back electrode 22 formed on back surface 20r, see Fig. 3B for the pattern shapes of back electrode 12 and back electrode 22.
  • back electrode 12 and back electrode 22 are taken into consideration for ease of illustration. The shape of is not displayed.
  • the surface electrode 11 (see FIG. 3A for the pattern shape of the surface electrode 11 is displayed on the surface 10 s of the first solar cell 10. In FIG. 1A and FIG. 1B, the shape of the surface electrode 11 is displayed in consideration of easy understanding of the drawing. Not formed). Further, the surface electrode 21 (see FIG. 3A for the pattern shape of the surface electrode 21 is displayed on the surface 20s of the second solar battery cell 20. In FIG. 1A and FIG. 1B, the shape of the surface electrode 21 is displayed in consideration of easy understanding of the drawing. Not formed).
  • the electrode configuration of the first solar cell 10 and the second solar cell 20 only needs to have an electrode (back electrode) on at least the back surface, and various forms can be adopted as long as this condition is satisfied.
  • an electrode back electrode
  • various forms can be adopted as long as this condition is satisfied.
  • the electrode configuration of the first solar battery cell 10 and the second solar battery cell 20 front and back double-sided electrode type in which electrodes are arranged on both front and back sides (for example, if the electrode on one side is a positive electrode, the other
  • the 1st photovoltaic cell 10 and the 2nd photovoltaic cell 20 should just be the structure which has an electrode (the back surface electrode 12, the back surface electrode 22) on the back surface (back surface 10r, back surface 20r) at least.
  • the solar cell module 1 is provided with a member for modularizing the solar cell row 31 on both sides of the solar cell row 31 in addition to the solar cell row 31. That is, the solar cell module 1 includes a translucent substrate 35 disposed on the surface of the solar cell array 31 (the surface 10 s of the first solar cell 10, the surface 20 s of the second solar cell 20), and the solar cell. Arranged between the protective member 36 disposed on the back surface side of the cell row 31 (the back surface 10r of the first solar cell 10 and the back surface 20r of the second solar cell 20), and between the translucent substrate 35 and the protective member 36. And a translucent sealing member 37 (front surface side sealing member 37f, back surface side sealing member 37r) that seals the solar cell rows 31. For convenience of explanation, the sealing member 37 may be described by distinguishing it from the front side sealing member 37f and the back side sealing member 37r. It becomes.
  • the solar cell module 1 includes a first output lead wire 15 that is connected to the back electrode 12 of the first solar cell 10 and outputs electric power to the outside.
  • the first output lead wire 15 is connected to the second solar cell 20. It is taken out to the outside through an opening 36m formed in the protection member 36.
  • the solar cell module 1 has an area for taking out the first output lead wire 15 connected to the back electrode 12 of the first solar cell 10 to the outside (for example, the first end side) of the solar cell row 31. 35f) and the first output lead wire 15 is pulled out from the back surface (back surface 10r, back surface 20r) side of the solar battery cell row 31, so the non-power generation area in the surface layout is reduced and the power generation efficiency (area) Power generation efficiency in terms of conversion) can be improved.
  • the lead tip 15t which is the tip of the first output lead wire 15, can be extended and arranged toward the back surface 20r of the second solar battery cell 20, and is connected to the back electrode 12 of the first solar battery cell 10.
  • the first output lead wire 15 can be taken out of the protective member 36 while being kept in the back surface region of the solar cell module 1 without being bent greatly, for example.
  • the surface electrode 11 of the first solar cell 10 is connected to the back electrode 22 of the second solar cell 20 via the interconnector 30.
  • the interconnector 30 includes a bent portion 30 c that is bent at a cell interval Dc between the first solar cell 10 and the second solar cell 20.
  • a sealing member 37 (back surface side sealing member 37 r) is disposed (filled).
  • a sealing member 37 (surface-side sealing member 37 f) is disposed (filled) between the translucent substrate 35 and the solar battery cell row 31.
  • the front-side sealing member 37f and the back-side sealing member 37r are integrated by applying the same material to constitute a sealing member 37 (sealing resin).
  • the back electrode 12 of the first solar cell 10 is connected to the first output lead wire 15, and the front electrode 21 of the second solar cell 20 is connected to the second output lead wire 25.
  • the second output lead wire 25 is taken out from the end surface 37t formed by the sealing member 37 (the front-side sealing member 37f and the back-side sealing member 37r). Further, the second output lead wire 25 is paired with the first output lead wire 15 to constitute an external terminal of the solar cell module 1.
  • the current path of the solar cell module 1 is the first output lead wire 15, the back electrode 12 (first solar cell 10) to which the first output lead wire 15 is connected, and between the back electrode 12 and the front electrode 11.
  • the first output lead 15 and the second output lead 25 One-way output power (DC output voltage, DC output current) corresponding to the polarity is extracted to the outside through a current path formed between the two.
  • solar cell module 1 in which two solar cells (first solar cell 10 and second solar cell 20) are arranged (in series connection) is illustrated.
  • first solar cell 10 Another solar cell is disposed between the second solar cell 20 and the second solar cell 20 to increase the number of solar cells connected in series with three, four,... It is also possible.
  • the first solar cell 10 and the second solar cell 20 are formed of, for example, a semiconductor crystal substrate, the planar shape is, for example, about 60 mm to 80 mm square, and the thickness of the semiconductor crystal substrate is, for example, about 100 ⁇ m to 200 ⁇ m. Moreover, the cell interval Dc between the 1st photovoltaic cell 10 and the 2nd photovoltaic cell 20 is about 4 mm, for example.
  • the interconnector 30, the first output lead wire 15, and the second output lead wire 25 are, for example, copper-plated with solder plating, and the width (interconnector width 30w, lead width 15w, lead width 25w) is 2 mm, for example.
  • the degree and thickness are about 0.2 mm.
  • the translucent substrate 35 is formed of a translucent plate member such as glass or polycarbonate, and has a thickness of about 300 ⁇ m to 500 ⁇ m, for example.
  • the thickness of the sealing member 37 is, for example, about 800 ⁇ m between the translucent substrate 35 and the protection member 36.
  • the sealing member 37 has a thickness (cushion thickness) that can maintain an elastic force even when the first output lead wire 15 and the interconnector 30 are deformed by thermal expansion and contraction, and is made of a material that can be elastically deformed. Therefore, it is composed of polyolefin resin, EVA (ethylene vinyl acetate) resin, or the like.
  • the protective member 36 is composed of a film formed of, for example, PET (polyethylene terephthalate) resin, PEN (polyethylene naphthalate) resin, PBN (polybutylene naphthalate) resin, etc. in consideration of mechanical strength, thermal characteristics, weather resistance, and the like. Has been.
  • the opening 36m from which the first output lead wire 15 is drawn is provided at a position facing the back surface 10r of the first solar battery cell 10.
  • the interconnector 30 since the position of the opening 36m from which the first output lead wire 15 is taken out is arranged away from the interconnector 30 (the bent portion 30c of the interconnector 30 at the cell interval Dc), the interconnector 30 (the bent portion 30c) and It becomes possible to secure a sufficient thickness of the sealing member 37 (mainly the back-side sealing member 37r: sealing resin) between the first output lead wire 15 and the interconnector 30 and the first Even when the one output lead wire 15 is deformed (thermal expansion / contraction), the surrounding sealing member 37 (sealing resin) surrounding the interconnector 30 and the first output lead wire 15 is elastically deformed to absorb the stress. Thus, disconnection of the interconnector 30 and the first output lead wire 15 can be prevented. Moreover, the insulation between the interconnector 30 and the 1st output lead wire 15 is ensured by ensuring the thickness of the sealing member 37 (front side sealing member 37f, back side sealing member 37r) sufficiently. Reliability.
  • the first output lead wire 15 has a lead bent portion 15c which is aligned to the opening 36m from the connected back electrode 12 and bent outward.
  • the lead bending portion 15c is led out to the outside through the opening 36m.
  • the opening 36m is formed as a slit that allows the first output lead wire 15 to pass therethrough.
  • the opening 36m and the lead bent portion 15c (first output lead wire 15) are separated from the edge (cell edge) facing the cell interval Dc of the first solar battery cell 10 by the separation interval Dp (opening from the cell edge). It is formed in a position (in other words, a position facing the back surface 10r in plan view) that is separated inward (cell center side) by a distance up to the portion 36m.
  • the separation interval Dp is about 3 mm, for example.
  • the separation distance Dp position of the opening 36 m
  • the first output lead wire 15 can be connected to most of the 12 length directions (extension direction of the first output lead wire 15) to suppress an increase in connection resistance. Easy and easy to process. Further, since the alignment accuracy can be about 0.5 mm or less, even if it is shifted in the decreasing direction, a minimum of about 2.5 mm can be secured, and the yield and productivity can be secured.
  • the separation interval Dp is preferably 1 mm at least. This is because even if a positional deviation occurs in the decreasing direction, a minimum of about 0.5 mm can be ensured, and an interval similar to that in the thickness direction can be ensured.
  • the translucent substrate 35 includes a first end side 35f and a second end side 35s disposed on the opposite side away from the first end side 35f, and the first solar cell 10 has a first end side.
  • the second solar battery cell 20 is disposed on the side of the second end side 35s.
  • the edge side of the 1st photovoltaic cell 10 arrange
  • the translucent substrate 35 is similarly rectangular. That is, in the translucent substrate 35, the first end side 35f and the second end side 35s are parallel to each other, and the first output lead wire 15 is extended in a direction intersecting the first end side 35f.
  • the first solar cell 10 and the second solar cell 20 can be arranged substantially in parallel between the first end side 35f and the second end side 35s, and the first solar cell 10 Since the end side of the second solar battery cell 20 and the second end side 35s can be arranged substantially in parallel with each other, the end side of the solar cell module 1
  • the power generation efficiency (power generation efficiency in terms of area) can be further improved by more effectively reducing the non-power generation area in the surface layout.
  • the solar cell module 1 includes the second output lead wire 25 that forms a pair with the first output lead wire 15 and outputs electric power to the outside.
  • the second output lead wire 25 includes the sealing member 37 (surface). The side sealing member 37f and the rear surface side sealing member 37r) are taken out from the end surface 37t.
  • the second output lead wire 25 is taken out from the end surface 37t which is the side surface instead of the back surface (back surface 10r, back surface 20r) side of the solar battery cell row 31, the second output lead wire 25 is routed from the front surface side to the back surface side.
  • the non-power generation area can be reduced and the power generation efficiency can be improved.
  • the second output lead wire 25 has a polarity opposite to that of the first output lead wire 15 and is configured to output power to the outside in a pair with the first output lead wire 15. Forms are possible.
  • the second output lead wire 25 is connected to the front surface electrode 21 unlike the first output lead wire 15, so that from the front surface 20 s to the back surface 20 r side. It is preferable that the lead tip 25t is taken out from the end surface 37t of the sealing member 37 (the front-side sealing member 37f and the back-side sealing member 37r) without being routed. By pulling out the lead tip 25t from the end surface 37t, it is not necessary to route the second output lead wire 25 to the back surface 20r. Therefore, an increase in the non-power generation region in the surface layout of the solar cell module 1 can be prevented.
  • FIG. 2A is a cross-sectional view showing a cross-sectional state at a position including interconnector 30 and first output lead wire 15 of solar cell module 1 according to Embodiment 2 of the present invention.
  • FIG. 2B is a plan view showing a back surface state of the solar cell module 1 shown in FIG. 2A.
  • the first output lead wire 15 is bent halfway, and the distance from the interconnector 30 (bending portion 30c) is taken to seal the sealing member 37 (sealing resin). Since the film thickness is sufficiently ensured and the insulation between the first output lead wire 15 and the interconnector 30 is sufficiently ensured, productivity, yield, and reliability can be improved.
  • the first output lead wire 15 is bent with respect to the extending direction of the interconnector 30, and is spaced from the interconnector 30 in plan view with respect to the back surface (back surface 10r, back surface 20r) of the solar battery cell row 31 (shifted space) Dr) is arranged.
  • the solar cell module 1 is arranged so that the first output lead wire 15 and the interconnector 30 do not overlap in the region facing the back surface 20r of the second solar cell 20, the solar cell (first solar cell) Sealing member 37 (front surface side sealing member 37f, back surface side) around interconnector 30 (bending portion 30c) in a direction perpendicular to the surfaces (back surface 10r, back surface 20r) of battery cell 10 and second solar cell 20)
  • a sufficient thickness of the sealing member 37r) can be secured, and the first output lead wire 15 and the interconnector 30 are arranged so as not to overlap each other in the direction of deformation due to thermal expansion / contraction.
  • the restriction on the elastic deformation of the member 37 can be suppressed, the interco Even when the Kuta 30 and the first output lead wire 15 are deformed (thermal expansion / contraction), the surrounding sealing member 37 (sealing resin) surrounding the interconnector 30 and the first output lead wire 15 is elastically deformed and stressed. By absorbing this, disconnection of the interconnector 30 and the first output lead wire 15 can be prevented.
  • the first output lead wire 15 has a lead width 15w of about 2 mm and a thickness of about 0.2 mm, the shift interval Dr can be easily obtained by performing a normal bending process.
  • the lead bending portion 15c is formed corresponding to the opening 36m as in the first embodiment.
  • a separation interval Dp distance from the cell edge to the opening 36 m
  • the first output lead wire 15 is connected to the interconnector 30 at a position corresponding to the bent portion 30 c of the interconnector 30.
  • the shift interval Dr the amount of displacement of the first output lead wire 15 with respect to the interconnector 30 at the position with respect to the bent portion 30c
  • the shift interval Dr is secured at least about 1 mm. It is preferable to do.
  • the bending amount of the first output lead 15 is shifted by the interconnector width 30w plus the length of 30 mm corresponding to the separation interval Dp.
  • the interval Dr. That is, the bending amount is 3 mm ( 2 mm + 1 mm) with respect to the length of 30 mm.
  • FIG. 3A is a schematic process diagram illustrating in plan the surface conditions of the prepared first solar cell 10 and second solar cell 20 in the method for manufacturing solar cell module 1 according to Embodiment 3 of the present invention. .
  • a surface electrode 11 is formed on the surface 10 s of the first solar cell 10.
  • An interconnector 30 is soldered to the surface electrode 11.
  • the 1st photovoltaic cell 10 and the 2nd photovoltaic cell 20 are made into the rectangular shape.
  • FIG. 3B shows a back surface state of the solar cell row 31 formed by connecting the first solar cell 10 and the second solar cell 20 in the method for manufacturing the solar cell module 1 according to Embodiment 3 of the present invention. It is a schematic process drawing shown in a plane.
  • the interconnector 30 solder-connected to the surface electrode 11 of the first solar battery cell 10 is bent at the bent portion 30c and solder-connected to the back electrode 22 of the second solar battery cell 20.
  • the first solar cell 10 and the second solar cell 20 are connected to form a solar cell array 31.
  • FIG. 3C shows a method for manufacturing the solar cell module 1 according to Embodiment 3 of the present invention, in which the first output lead wire 15 is connected to the back electrode 12 of the first solar cell 10 after the solar cell row 31 is formed.
  • FIG. 4 is a schematic process diagram illustrating in plan a back surface state in the process of connecting and connecting the second output lead wire 25 to the front surface electrode 21 of the second solar battery cell 20.
  • the first output lead wire 15 is connected to the back electrode 12 of the first solar cell 10.
  • the first output lead 15 is bent in advance in the direction toward the outside by the lead bending portion 15 c and extended toward the second solar battery cell 20.
  • first output lead wire 15 and the interconnector 30 are illustrated with slightly different widths. However, as described in the first embodiment, the same width (lead width) is described. 15 w, interconnector width 30 w, lead width 25 w).
  • FIG. 3D shows a method for manufacturing the solar cell module 1 according to Embodiment 3 of the present invention, in which the first output lead wire 15 and the second output lead wire 25 are connected to the solar cell array 31, and then the light transmission is performed.
  • It is a schematic process drawing which shows in cross-section the process in which the conductive substrate 35, the front surface side sealing member 37f (sealing member 37), and the solar battery cell row 31 are sequentially stacked to prepare for sealing.
  • the surface-side sealing member 37f is disposed on the translucent substrate 35, and the solar cell array 31 is disposed on the surface-side sealing member 37f.
  • a sheet made of PP (polypropylene) resin can be applied as the translucent substrate 35.
  • the front-side sealing member 37f is molded, for example, into a sheet shape, but is welded in a heating / pressurizing process that is a subsequent process. At this stage, the thickness of the surface side sealing member 37f is, for example, about 420 ⁇ m. The thickness of the surface side sealing member 37f is finally about 400 ⁇ m by welding.
  • FIG. 3E is a plan view of a back surface side sealing member 37r (sealing member 37) prepared for overlapping the back surface of the solar cell row 31 in the method for manufacturing the solar cell module 1 according to Embodiment 3 of the present invention.
  • FIG. 3E is a plan view of a back surface side sealing member 37r (sealing member 37) prepared for overlapping the back surface of the solar cell row 31 in the method for manufacturing the solar cell module 1 according to Embodiment 3 of the present invention.
  • a back surface side sealing member 37r having the same shape as the front surface side sealing member 37f is prepared. Unlike the front surface side sealing member 37f, the back surface side sealing member 37r has an opening 37m formed in advance.
  • the opening 37m is a slit (cut) for allowing the first output lead wire 15 to pass therethrough, and may be a hole that only allows the first output lead wire 15 to pass therethrough.
  • the front surface side sealing member 37f and the back surface side sealing member 37r have a rectangular shape in accordance with the rectangular translucent substrate 35.
  • FIG. 3F shows a method for manufacturing solar cell module 1 according to Embodiment 3 of the present invention, in which a back surface side sealing member 37r (sealing member 37) is overlaid on the back surface of solar cell column 31 to prepare for sealing. It is a schematic process drawing which shows a process in section.
  • the first output lead wire 15 is passed through the opening 37m, and the back surface side sealing member 37r is overlaid on the solar cell row 31.
  • the first output lead wire 15 is appropriately bent at the lead bending portion 15c so as to correspond to the back surface side sealing member 37r.
  • the total thickness of the front surface side sealing member 37f and the back surface side sealing member 37r is about 420 ⁇ m in two layers, which is about 840 ⁇ m.
  • FIG. 3G shows the protection prepared for further stacking on the back surface side sealing member 37r (sealing member 37) stacked on the solar cell row 31 in the method for manufacturing the solar cell module 1 according to Embodiment 3 of the present invention.
  • FIG. 4 is a schematic process diagram illustrating a planar state of a member 36.
  • the protection member 36 having an opening 36m formed in advance is prepared.
  • the protection member 36 is a film for filling the sealing member 37 (the front-side sealing member 37f and the back-side sealing member 37r) with the translucent substrate 35, and acts as a back sheet.
  • the opening 36m is a slit (cut) for allowing the first output lead wire 15 to pass therethrough, and may be a hole that only allows the first output lead wire 15 to pass therethrough, and is formed as small as possible.
  • the protection member 36 has a rectangular shape like the light-transmitting substrate 35 and the sealing member 37, and has the same size in plan view.
  • the opening 36m and the opening 37m are provided at a position corresponding to the lead bending portion 15c, and the first output lead wire 15 is easily taken out to the outside.
  • FIG. 3H shows a preparation for sealing by stacking the protective member 36 on the back surface side sealing member 37r (sealing member 37) of the solar cell row 31 in the method for manufacturing the solar cell module 1 according to Embodiment 3 of the present invention. It is a model process figure which shows the process which carried out in cross section.
  • the first output lead wire 15 is passed through the opening 36m, and the protective member 36 is overlaid on the back surface side sealing member 37r.
  • the flat plate 40 is inserted between the first output lead wire 15 and the protection member 36 from the lead bending portion 15c. That is, the flat plate 40 is disposed so as to cover the protection member 36 at a position facing the interconnector 30 (bending portion 30c) at the cell interval Dc.
  • the sealing members 37 (the front side sealing member 37f and the peripheral side of the bent portion 30c arranged in the region of the cell interval Dc and The pressure by the first output lead wire 15 is concentrated on the back surface side sealing member 37r), the sealing member 37 becomes thin, and there is a possibility that a phenomenon that the sealing member 37 (sealing resin) is not sufficiently filled occurs.
  • the flat plate 40 it is possible to prevent such a phenomenon by suppressing the pressure from being concentrated on the region facing the first output lead wire 15.
  • the flat plate 40 a material that is not deformed by heating and pressing is suitable, and for example, a thin and hard aluminum plate (metal plate) having a thickness of about 0.2 mm to 0.3 mm can be applied.
  • a thin and hard aluminum plate (metal plate) having a thickness of about 0.2 mm to 0.3 mm can be applied.
  • the shape and action of the flat plate 40 will be further described with reference to FIGS. 4A and 4B.
  • FIG. 3I shows a method for manufacturing solar cell module 1 according to Embodiment 3 of the present invention, in which transparent substrate 35, sealing member 37 (surface-side sealing member 37f), solar cell array 31, sealing member are used.
  • 37 is a schematic process diagram cross-sectionally showing a process of placing the solar cell module 1 in a state in which 37 (back surface side sealing member 37r) and the protective member 36 are stacked on a processing apparatus that performs heating and pressurizing processes.
  • the solar cell module 1 After delaminating the laminating apparatus 50 in a vacuum state, the solar cell module 1 is heated to an appropriate melting temperature (for example, about 150 ° C. to 160 ° C.) and further pressurized by the pressurizing means 50p.
  • an appropriate melting temperature for example, about 150 ° C. to 160 ° C.
  • FIG. 4A shows a method for manufacturing solar cell module 1 according to Embodiment 3 of the present invention, in which transparent substrate 35, sealing member 37 (surface-side sealing member 37f), solar cell array 31, sealing member are used.
  • 37 is a schematic process diagram showing a cross-sectional state of solar cell module 1 after performing a heating / pressurizing process on 37 (back surface side sealing member 37r) and protective member 36.
  • FIG. 4B is a plan view showing a back surface state of the solar cell module 1 shown in FIG. 4A.
  • the front-side sealing member 37f and the back-side sealing member 37r arranged as sheet-like members on both surfaces of the solar battery cell row 31 are integrated because they are melted / welded / cured by heating / pressurizing treatment. It becomes the sealing member 37 (sealing resin), and the photovoltaic cell row
  • the solar cell array 31 disposed between the translucent substrate 35 and the protective member 36 is a sealing member 37 (formed by melting and curing the front side sealing member 37f and the rear side sealing member 37r). It is sealed and welded by the sealing resin) and is surely protected by the translucent substrate 35, the sealing member 37, and the protection member 36.
  • the thickness of the sealing member 37 (sealing resin) is about 800 ⁇ m, which is about 840 ⁇ m in the preparation stage by the heating / pressurizing process.
  • the flat plate 40 disposed between the first output lead wire 15 drawn out from the opening 36m and the protective member 36 is separated from the sealing member 37 having weldability by the protective member 36. It is not bonded even in the pressure treatment. Therefore, it is possible to remove the flat plate 40 after finishing the heating / pressurizing process, and the thickness of the solar cell module 1 is suppressed by removing the flat plate 40, and prevents the thickness from becoming more than necessary. it can. Further, the removed flat plate 40 can be used repeatedly.
  • the flat shape of the flat plate 40 (see FIG. 4B) has a width (flat plate width 40w: length in a direction intersecting the first end side 35f) of, for example, about 15 mm to 30 mm, and a length (flat plate length 40p: first end side 35f). For example) is about 80 mm to 100 mm.
  • the flat plate length 40p coincides with the outer edge of the translucent substrate 35 (solar cell module 1).
  • the dimension (length) of the flat plate length 40p is preferably larger than the dimensions of the first solar cell 10 and the second solar cell 20.
  • the dimension of the translucent substrate 35 the length of the first end side 35 f
  • the flat plate 40 When heating / pressurizing (when placed on the laminating apparatus 50), the flat plate 40 has a predetermined distance from the opening 36m (opposite distance Ds: opposite side of the flat plate 40 facing the opening 36m). (Space between 40 m and opening 36 m).
  • the facing distance Ds is preferably about 1 mm or more, for example.
  • the flat plate 40 By arranging the flat plate 40 during the heating / pressurizing process by the laminating apparatus 50, it is possible to prevent the opening 36m from tearing due to the pressure from the molten sealing member 37 (sealing resin) during pressurization. The risk of the molten resin (sealing resin) of the sealing member 37 flowing out from the opening 36m can be prevented. Further, since the flat plate 40 is disposed away from the opening 36m by the facing distance Ds, even if the molten resin (sealing resin) of the sealing member 37 slightly flows out from the opening 36m, it is difficult to reach the flat plate 40. Therefore, when the flat plate 40 is removed, the phenomenon that the sealing member 37 is pulled by the flat plate 40 and the opening 36m is lifted and torn can be prevented.
  • the opening 36m is formed by setting the separation distance Dp, which is the distance from the cell interval Dc (the edge of the first solar cell 10) to the opening 36m, to about 3 mm, for example (Embodiment 1), the opening 36m and the flat plate
  • the facing distance Ds which is the distance from 40 (opposing side 40 m)
  • the flat plate 40 can reliably cover the cell distance Dc.
  • the flat plate 40 acts so that a uniform pressure is applied to the cell interval Dc and the periphery thereof, the phenomenon that the sealing resin of the sealing member 37 becomes thin around the bent portion 30c is prevented. Highly reliable resin sealing can be performed.
  • the method for manufacturing the solar cell module 1 includes the first solar cell 10 and the first solar cell 10 having the back electrodes (the back electrode 12 and the back electrode 22) on at least the back surface (the back surface 10r and the back surface 20r).
  • Two solar cells 20 connected in series via the interconnector 30, a translucent substrate 35 disposed on the front side of the solar cell row 31, and the back surface of the solar cell row 31 ( A protective member 36 disposed on the back surface 10r, back surface 20r) side, and a translucent sealing member 37 (which is disposed between the translucent substrate 35 and the protective member 36 and seals the solar cell rows 31).
  • the first output lead 15 is a second solar cell manufacturing method of the solar cell module 1 has been removed to the outside from an extended protective member 36 which is formed in the opening 36m toward the cell 20.
  • the first step includes a step of taking out the first output lead wire 15 from the opening 36m and the opening 37m to the outside, and between the first solar cell 10 and the second solar cell 20 (cell spacing). Dc) part of the interconnector 30 (folded part) To cover the position opposed to 0c), and a step of placing a plate 40 between the first output lead 15 taken out from the opening 36m to the outside and the protective member 36.
  • the manufacturing method of the solar cell module 1 is the sealing member 37 (surface) in the position facing the part (bending part 30c) of the interconnector 30 between the 1st photovoltaic cell 10 and the 2nd photovoltaic cell 20. Since it is possible to ensure the thickness of the side sealing member 37f and the back surface side sealing member 37r), the stress generated by the deformation of the interconnector 30 is applied to the sealing member 37 (the front surface side sealing member 37f and the back surface side sealing). A highly reliable solar cell module 1 that can be absorbed by the stop member 37r) can be manufactured.
  • the flat plate 40 may be removed, and the method for manufacturing the solar cell module 1 according to the present embodiment preferably includes a step of removing the flat plate 40 after the second step.
  • Embodiments 1 to 3 can be applied in combination. Also in this case, the same effect as the solar cell module 1 according to the first to third embodiments can be obtained.
  • FIG. 5 is a conceptual cross-sectional view of a solar cell module shown as a comparative example in order to explain the function and effect of the present invention (Embodiment 1 to Embodiment 3).
  • FIG. 5 shows a case where the opening 36m is arranged at a position facing the bent portion 30c of the interconnector 30, and the translucent substrate 35, the protective member 36, the sealing member 37, and the solar battery cell row 31 are stacked. .
  • the lead bent portion 15c of the first output lead wire 15 is pressed to the bent portion 30c side. That is, in the proximity distance Dn between the lead bent portion 15c and the bent portion 30c, the thickness of the sealing member 37 is extremely thin. In such a thin state, the first output lead wire 15 and the interconnector 30 It cannot absorb deformation caused by temperature changes. Therefore, the effect of preventing the disconnection of the first output lead wire 15 or the interconnector 30 is weakened, and there is a risk of a short circuit, thereby reducing the reliability.
  • the solar battery module 1 shown in the first to third embodiments is arranged such that the position of the opening 36 m is the back surface of the first solar battery cell 10. Since it is made to oppose 10r, the state where the thickness of the sealing member 37 (sealing resin) around the interconnector 30 (bending part 30c) becomes thin can be avoided, and reliability is improved.
  • FIG. 6A is a plan view showing a surface state of solar cell module 1 according to Embodiment 4 of the present invention.
  • FIG. 6B is a cross-sectional view showing a cross-sectional state taken along arrows BB of the solar cell module 1 shown in FIG. 6A.
  • FIG. 6C is a plan view showing a back surface state of the solar cell module 1 shown in FIG. 6A.
  • the solar cell module 1 includes a solar cell row 31 in which the first solar cell 10 and the second solar cell 20 are connected in series.
  • a comb electrode 11 b is formed on the surface 10 s of the first solar cell 10
  • a comb electrode 21 b is formed on the surface 20 s of the second solar cell 20.
  • the comb-shaped electrode is formed over the entire surface 10s, 20s, and acts to reduce electrode resistance.
  • the comb-shaped electrode 11b of the first solar cell 10 is collected by the surface electrode 11 formed in the intersecting direction
  • the comb-shaped electrode 21b of the second solar cell 20 is collected on the surface electrode 21 formed in the intersecting direction. Current is collected.
  • the first solar cell 10 and the second solar cell 20 are connected by the interconnector 30 as shown in the first to third embodiments. That is, the surface electrode 11 and the surface electrode 21 are arranged on the base portion of the comb-shaped electrode 11b and the comb-shaped electrode 21b on the surface 10s and the surface 20s.
  • the mask pattern 35m is formed in a shape covering and concealing the surface electrode 11 and the surface electrode 21 from the first end side 35f to the second end side 35s.
  • the mask pattern 35m transmits an appropriate paint (for example, an interconnector 30 connected to the surface electrode 11 and a black system having a light shielding property that makes the second output lead 25 connected to the surface electrode 11 invisible from the outside) transparent. It forms by apply
  • first solar cell 10 and the second solar cell 20 have a rectangular shape as a basic shape, but are chamfered (formation of a corner portion by cutting the apex) at one of the four apexes.
  • the corner 10c of the first solar cell 10 and the corner 20c of the second solar cell 20 are formed.
  • the 1st photovoltaic cell 10 and the 2nd photovoltaic cell 20 are arrange
  • An opening 36m is formed at a position facing the back surface 10r of the first solar battery cell 10, and the first output lead wire 15 is taken out.
  • the first output lead wire 15 is extended toward the back surface 20 r of the second solar battery cell 20. Further, the second output lead wire 25 is taken out from the end face 37t.
  • or Embodiment 3 can be applied also to the solar cell module 1 which concerns on this Embodiment, and Embodiment 1 thru
  • the present invention can provide a solar cell module capable of improving the power generation efficiency by reducing the non-power generation area in the surface layout, and the manufacturing method thereof, and is useful in the field of the solar power generation system.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention porte sur : un module de cellules solaires qui possède un rendement de production d'énergie électrique amélioré par réduction de la zone non productrice d'énergie électrique dans l'agencement de surface ; et un procédé de fabrication du module de cellules solaires. Un module de cellules solaires (1) selon un mode de réalisation de l'invention comprend : une matrice de cellules solaires (31) (une première cellule solaire (10) et une seconde cellule solaire (20) qui sont connectées en série par un interconnecteur (30)) ; un substrat transmettant la lumière (35) qui est disposé côté surface avant de la matrice de cellules solaires (31) ; un élément protecteur (36) qui est disposé côté surface arrière de la matrice de cellules solaires (31) ; un élément de scellement transmettant la lumière (37) (un élément de scellement côté surface avant (37f) et un élément de scellement côté surface arrière (37r)) qui est disposé entre le substrat transmettant la lumière (35) et l'élément protecteur (36) et scelle la matrice de cellules solaires (31) ; et un premier fil conducteur de sortie (15) qui est connecté à une électrode de surface arrière (12) de la première cellule solaire (10) et délivre de l'énergie électrique à l'extérieur. Le premier fil conducteur de sortie (15) est fait s'étendre vers la seconde cellule solaire (20) et est fait sortir à l'extérieur par une partie d'ouverture (36m) qui est formée dans l'élément protecteur (36).
PCT/JP2011/065990 2010-07-28 2011-07-13 Module de cellules solaires et son procédé de fabrication WO2012014680A1 (fr)

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JP2010169409A JP5047340B2 (ja) 2010-07-28 2010-07-28 太陽電池モジュールの製造方法

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Cited By (1)

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JP2015518289A (ja) * 2012-05-31 2015-06-25 ダウ グローバル テクノロジーズ エルエルシー 高利用度光起電力デバイス

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JP6562314B2 (ja) 2014-09-30 2019-08-21 パナソニックＩｐマネジメント株式会社 太陽電池モジュールおよび太陽電池モジュールの製造方法

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JPH10270734A (ja) * 1997-03-27 1998-10-09 Canon Inc 太陽電池モジュール
JPH11303325A (ja) * 1998-04-20 1999-11-02 Sanyo Electric Co Ltd 太陽電池モジュール
JP2006013406A (ja) * 2004-06-29 2006-01-12 Sanyo Electric Co Ltd 太陽電池モジュール
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JPH0363954U (fr) * 1989-10-27 1991-06-21
JPH10270734A (ja) * 1997-03-27 1998-10-09 Canon Inc 太陽電池モジュール
JPH11303325A (ja) * 1998-04-20 1999-11-02 Sanyo Electric Co Ltd 太陽電池モジュール
JP2006013406A (ja) * 2004-06-29 2006-01-12 Sanyo Electric Co Ltd 太陽電池モジュール
JP2006060028A (ja) * 2004-08-20 2006-03-02 Kyocera Corp 太陽電池モジュール
JP2009021288A (ja) * 2007-07-10 2009-01-29 Sanyo Electric Co Ltd 太陽電池モジュール

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