WO2017150372A1 - Solar battery module and method for manufacturing solar battery module - Google Patents

Solar battery module and method for manufacturing solar battery module Download PDF

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Publication number
WO2017150372A1
WO2017150372A1 PCT/JP2017/007070 JP2017007070W WO2017150372A1 WO 2017150372 A1 WO2017150372 A1 WO 2017150372A1 JP 2017007070 W JP2017007070 W JP 2017007070W WO 2017150372 A1 WO2017150372 A1 WO 2017150372A1
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WO
WIPO (PCT)
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region
conductive film
film adhesive
disposed
solar
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PCT/JP2017/007070
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French (fr)
Japanese (ja)
Inventor
和生 太田
潤也 三原
Original Assignee
パナソニックＩｐマネジメント株式会社
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Priority to JP2018503101A priority Critical patent/JPWO2017150372A1/en
Publication of WO2017150372A1 publication Critical patent/WO2017150372A1/en

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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
    • 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, particularly a solar cell module in which a plurality of solar cells are connected by a wiring material, and a method for manufacturing the solar cell module.
  • the solar cell module a plurality of solar cells are arranged flat and flush with each other.
  • a conductive material is disposed on the surface of each solar battery cell, and two adjacent solar battery cells are electrically connected via the conductive material and the connection member (see, for example, Patent Document 1).
  • a conductive film adhesive is used as the conductive material. Since the conductive film adhesive is generally expensive, it is desirable that the amount of the conductive film adhesive used is small in order to suppress the manufacturing cost of the solar cell module. On the other hand, since the conductive film adhesive is used to bond the wiring member as the connecting member and the surface of the solar battery cell, the adhesive strength is reduced even when the amount used is reduced. Should be suppressed.
  • the present invention has been made in view of such a situation, and an object thereof is to provide a technique for suppressing a decrease in adhesive force while reducing the amount of conductive film adhesive used.
  • a solar cell module includes a plurality of solar cells, a wiring material that electrically connects adjacent solar cells among the plurality of solar cells, and wiring A conductive film adhesive is provided between the surface of the solar cells to be connected by the material and the wiring material.
  • the conductive film adhesive is disposed in the first region and not disposed in the second region among the first region and the second region included in the connection region to which the wiring material is to be connected on the surface of the solar battery cell. It is.
  • Another aspect of the present invention is a method for manufacturing a solar cell module.
  • the method includes the steps of disposing a conductive film adhesive on the surface of the solar cell, connecting the wiring material to the surface of the solar cell by adhering the wiring material to the conductive film adhesive, and Is provided.
  • the conductive film adhesive is arranged in the first region among the first region and the second region included in the connection region to which the wiring material is to be connected on the surface of the solar battery cell, and the second region.
  • the conductive film adhesive is not disposed.
  • FIGS. 5A to 5C are cross-sectional views along the x-axis of the solar battery cell of FIG. 6 (a) to 6 (e) are plan views showing various configurations of the solar battery cell of FIG. 3 (a).
  • FIGS. 7A to 7B are diagrams showing the configuration of the solar battery cell according to Example 2 of the present invention.
  • Example 1 of the present invention relates to a solar cell module in which a plurality of solar cells are arranged.
  • a bus bar electrode is disposed on the surface of each solar battery cell.
  • a wiring material is adhere
  • the bus bar electrode and the wiring material are electrically connected.
  • the wiring material is also bonded to the solar cell adjacent to the solar cell, the two adjacent solar cells are electrically connected.
  • the conductive film adhesive is generally expensive, it is required to reduce the amount used.
  • the solar cell module according to this example is configured as follows.
  • a connection area is defined on the surface of the solar battery cell as an area to which a wiring material is to be connected.
  • the connection area is classified into a first area and a second area.
  • the first region is a region where the conductive film adhesive is to be disposed
  • the second region is a region where the conductive film adhesive is not disposed.
  • the second region is formed along one direction in which the bus bar electrode extends so as to overlap the bus bar electrode, and the first region is arranged side by side on both sides of the second region.
  • the surface of the solar battery cell and the wiring material are bonded by the adhesive force of the conductive film adhesive.
  • the connection between the bus bar electrode and the wiring material is maintained by the wiring material directly contacting the bar bar electrode.
  • parallel and “orthogonal” include not only perfect parallel and orthogonal, but also a case of deviating from parallel within an error range. Further, “substantially” means that they are the same in an approximate range.
  • FIG. 1 is a plan view from the light-receiving surface side of the configuration of the solar cell module 100 according to Example 1 of the present invention.
  • FIG. 2 is a plan view from the back side of the solar cell module 100.
  • an orthogonal coordinate system including an x-axis, a y-axis, and a z-axis is defined.
  • the x axis and the y axis are orthogonal to each other in the plane of the solar cell module 100.
  • the z axis is perpendicular to the x axis and the y axis and extends in the thickness direction of the solar cell module 100.
  • the positive directions of the x-axis, y-axis, and z-axis are each defined in the direction of the arrow in FIG. 1, and the negative direction is defined in the direction opposite to the arrow.
  • the main plane arranged on the positive side of the z axis is the light receiving surface
  • the z axis The main plane arranged on the negative direction side is the back surface.
  • the positive direction side of the z-axis is referred to as “light-receiving surface side”
  • the negative direction side of the z-axis is referred to as “back surface side”.
  • the solar cell module 100 includes eleventh solar cells 10aa, collectively referred to as solar cells 10, ..., 84th solar cell 10hd, inter-group wiring member 14, group end wiring member 16, inter-cell wiring member 18, A termination wiring member 20 is included.
  • the first non-power generation region 38a and the second non-power generation region 38b are arranged so as to sandwich the plurality of solar cells 10 in the y-axis direction. Specifically, the first non-power generation region 38 a is arranged on the positive side of the y axis with respect to the plurality of solar cells 10, and the second non-power generation region 38 b is on the y axis with respect to the plurality of solar cells 10. It is arranged on the negative direction side.
  • the first non-power generation region 38 a and the second non-power generation region 38 b (hereinafter, sometimes collectively referred to as “non-power generation region 38”) have a rectangular shape and do not include the solar battery cell 10.
  • the solar battery cell 10 is made of, for example, a semiconductor material such as crystalline silicon, gallium arsenide (GaAs), or indium phosphorus (InP).
  • the structure of the solar battery cell 10 is not particularly limited, but here, as an example, it is assumed that crystalline silicon and amorphous silicon are stacked.
  • FIGS. 3A to 3B are plan views showing the configuration of the solar battery cell 10.
  • FIG. 3A shows the light receiving surface of the solar battery cell 10
  • FIG. 3B shows the back surface of the solar battery cell 10.
  • a plurality of finger electrodes 52 extending in the x-axis direction are arranged in parallel with each other on the light receiving surface and the back surface of the solar battery cell 10.
  • a plurality of, for example, three bus bar electrodes extending in the y-axis direction so as to be orthogonal to the plurality of finger electrodes 52 are disposed on the light receiving surface and the back surface of the solar battery cell 10.
  • the bus bar electrode 50 connects each of the plurality of finger electrodes 52.
  • the bus bar electrode 50 and the finger electrode 52 are formed of, for example, silver paste. Other configurations will be described later, and the description returns to FIGS. 1 and 2.
  • the plurality of solar cells 10 are arranged in a matrix on the xy plane.
  • eight solar cells 10 are arranged in the x-axis direction, and four solar cells 10 are arranged in the y-axis direction.
  • the number of the photovoltaic cells 10 arranged in the x-axis direction and the number of the photovoltaic cells 10 arranged in the y-axis direction are not limited to this.
  • the four solar cells 10 arranged side by side in the y-axis direction are connected in series by the inter-cell wiring member 18 to form one solar cell group 12.
  • the first solar cell group 12a is formed by connecting the eleventh solar cell 10aa, the twelfth solar cell 10ab, the thirteenth solar cell 10ac, and the fourteenth solar cell 10ad.
  • Other solar cell groups 12, for example, the second solar cell group 12b to the eighth solar cell group 12h are formed in the same manner.
  • the eight solar cell groups 12 are arranged in parallel in the x-axis direction.
  • the solar cell group 12 corresponds to a string.
  • the inter-cell wiring member 18 connects the bus bar electrode 50 on one light receiving surface side of the adjacent solar cells 10 and the bus bar electrode 50 on the other back surface side.
  • the two inter-cell wiring members 18 for connecting the eleventh solar cell 10aa and the twelfth solar cell 10ab are the bus bar electrode 50 on the back surface side of the eleventh solar cell 10aa and the twelfth solar cell 10ab.
  • the inter-cell wiring member 18 is disposed so as to overlap the bus bar electrodes 50. In FIG. Connection of the inter-cell wiring member 18 on the light receiving surface and the back surface of the solar battery cell 10 will be described later, and the description returns to FIGS. 1 and 2.
  • Each of the seven inter-group wiring members 14 extends in the x-axis direction and is electrically connected to two adjacent solar cell groups 12 via the group end wiring member 16.
  • Each is electrically connected to the inter-group wiring member 14 via the group end wiring member 16.
  • the group end wiring member 16 is arranged in the same manner as the inter-cell wiring member 18 on the light receiving surface or the back surface of the solar battery cell 10.
  • the termination wiring member 20 is connected to the first solar cell group 12a and the eighth solar cell group 12h located at both ends in the x-axis direction.
  • the termination wiring member 20 connected to the first solar cell group 12a extends in the direction of the first non-power generation region 38a from the light receiving surface side of the eleventh solar cell 10aa.
  • a pair of positive and negative lead wires is connected to the termination wiring member 20.
  • FIG. 4 is a cross-sectional view taken along the y-axis of the solar cell module 100, and is a cross-sectional view taken along the line A-A ′ of FIG.
  • the solar cell module 100 includes an eleventh solar cell 10aa, a twelfth solar cell 10ab, a thirteenth solar cell 10ac, a fourteenth solar cell 10ad, an inter-group wiring member 14, and a group end.
  • Wiring material 16, inter-cell wiring material 18, termination wiring material 20, take-out wiring 30, first protective member 40a, second protective member 40b, collectively referred to as protective member 40, and first sealing, collectively referred to as sealing member 42 A member 42a, a second sealing member 42b, and a terminal box 44 are included.
  • the upper side in FIG. 4 corresponds to the back side, and the lower side corresponds to the light receiving side.
  • the first protective member 40 a is disposed on the light receiving surface side of the solar cell module 100 and protects the surface of the solar cell module 100.
  • the first protective member 40a is made of a light-transmitting and water-blocking glass, a light-transmitting plastic, or the like, and is formed in a rectangular plate shape.
  • the 1st sealing member 42a is laminated
  • the 1st sealing member 42a is arrange
  • first sealing member 42a for example, a thermoplastic resin such as a resin film of polyolefin, EVA, PVB (polyvinyl butyral), polyimide, or the like is used. A thermosetting resin may be used.
  • the first sealing member 42a is formed of a rectangular sheet material having translucency and having a surface having substantially the same dimensions as the xy plane of the first protection member 40a.
  • the second sealing member 42b is laminated on the back side of the first sealing member 42a.
  • the second sealing member 42b seals the plurality of solar cells 10, the inter-cell wiring member 18 and the like with the first sealing member 42a.
  • the 2nd sealing member 42b can use the thing similar to the 1st sealing member 42a.
  • the second sealing member 42b may be integrated with the first sealing member 42a by heating in the laminating / curing process.
  • the second protective member 40b is laminated on the back side of the second sealing member 42b.
  • the 2nd protection member 40b protects the back surface side of the solar cell module 100 as a back sheet.
  • a resin film such as PET (polyethylene terephthalate), a laminated film having a structure in which an Al foil is sandwiched between resin films, and the like are used.
  • the second protective member 40b is provided with an opening (not shown) penetrating in the z-axis direction.
  • the terminal box 44 is formed in a rectangular parallelepiped shape, and is bonded from the back surface side of the second protective member 40b using an adhesive such as silicone so as to cover the opening (not shown) of the second protective member 40b.
  • the lead-out wiring 30 is led to a bypass diode (not shown) stored in the terminal box 44.
  • the terminal box 44 is arrange
  • An Al frame frame may be attached around the solar cell module 100.
  • connection region 54 a region to which the inter-cell wiring member 18 is connected on the light receiving surface of the solar battery cell 10 is shown as a connection region 54.
  • 3A is a configuration when the solar battery cell 10 is viewed from the light receiving surface side, and therefore, the inter-cell wiring member 18 and the connection region 54 coincide with each other in FIG.
  • the connection area 54 is divided into a first area 56 and a second area 58.
  • the first region 56 is a region where the conductive film adhesive 60 is to be disposed
  • the second region 58 is a region where the conductive film adhesive 60 is not disposed.
  • the second region 58 is formed in the y-axis direction in which the bus bar electrode 50 extends while overlapping with the bus bar electrode 50.
  • the width of the second region 58 in the x-axis direction is made wider than the width of the bus bar electrode 50 in the x-axis direction.
  • the first region 56 is formed to extend in the y-axis direction along with both sides of the second region 58.
  • the conductive film adhesive 60 is disposed in the first region 56 and is not disposed in the second region 58.
  • the conductive film adhesive 60 is a polymer resin containing an acrylic polymer and a thermosetting resin.
  • the conductive film adhesive 60 also includes conductive particles and has anisotropic conductivity.
  • FIGS. 5A to 5C are used.
  • FIGS. 5A to 5C are cross-sectional views taken along the x-axis of the solar battery cell 10, and are cross-sectional views taken along the line B-B ′ of FIG. In these, the vicinity of one of the three bus bar electrodes 50 shown in FIG. 3A is enlarged.
  • the second region 58 is disposed so as to include the bus bar electrode 50 on the light receiving surface of the solar battery cell 10.
  • the conductive film adhesive 60 is arrange
  • the conductive film adhesive 60 is disposed between the light receiving surface of the solar battery cell 10 and the inter-cell wiring member 18 in the z-axis direction in order to bond the light receiving surface.
  • the bonding is performed by thermocompression bonding.
  • the bus bar electrode 50 and the inter-cell wiring member 18 are in direct contact with each other in the z-axis direction. In particular, since the inter-cell wiring member 18 is in direct contact with the bus bar electrode 50, the adhesive force between the two is ensured and the connection between the two is maintained without using the conductive film adhesive 60.
  • FIG.5 (b) is sectional drawing which shows the structure of the photovoltaic cell 110 used as the comparison object of the photovoltaic cell 10 of Fig.5 (a), and shows the conventional general structure.
  • the conductive film adhesive 60 is entirely disposed between the connection region 54 and the inter-cell wiring member 18 in the z-axis direction so as to surround the bus bar electrode 50.
  • the amount of the conductive film adhesive 60 used is reduced in the x-axis direction and the z-axis direction.
  • FIG. 5C shows an arrangement of the conductive film adhesive 60 different from that shown in FIG. In FIG.5 (c), the 1st area
  • the conductive film adhesive 60 is not disposed in the second region 58 and is disposed only in the first region 56, but bonds across the bus bar electrode 50 on the positive side of the z axis. Since the inter-cell wiring member 18 and the conductive film adhesive 60 are in full contact with each other in the x-axis direction, the adhesive force is strengthened.
  • the usage amount of the conductive film adhesive 60 is reduced in the x-axis direction in the solar battery cell 10 in FIG.
  • the arrangement of the conductive film adhesive 60 on the light receiving surface of the solar battery cell 10 has been described based on FIGS. 3 (a) and 5 (a)-(c).
  • the conductive film adhesive 60 is similarly disposed on the back surface side of the solar battery cell 10.
  • FIGS. 6A to 6E are plan views showing various configurations of the solar battery cell 10. In these, the vicinity of the bus-bar electrode 50 arrange
  • FIG. 6 (a) is shown in the same manner as FIG. 3 (a), which is a comparison object with FIG. 6 (b)-(e).
  • the conductive film adhesive 60 is disposed in a wavy shape in the connection region 54 while extending in the y-axis direction. Therefore, it can be said that the first region 56 is also formed in a waveform shape.
  • the second region 58 is disposed in a portion other than the portion where the conductive film adhesive 60 is disposed.
  • the conductive film adhesive 60 is disposed in the y-axis direction in which the bus bar electrode 50 extends while straddling the bus bar electrode 50 a plurality of times. That is, the conductive film adhesive 60 alternately extends in the positive and negative directions of the x-axis and also extends in the y-axis direction across the bus bar electrode 50 in the width of the connection region 54 in the x-axis direction. . This is a zigzag shape. Further, in the connection region 54, the second region 58 is disposed in a portion other than the portion where the conductive film adhesive 60 is disposed.
  • the conductive film adhesive 60 is discretely arranged in the y-axis direction in which the bus bar electrode 50 extends. That is, the conductive film adhesive 60 includes a plurality of rectangular portions that are longer in the x-axis direction than in the y-axis direction, and these are discretely arranged in the y-axis direction. Moreover, in the connection area
  • the second area 58 in the connection area 54, the second area 58 is arranged at a portion where FIG. 6A and FIG. 6D are combined. That is, the second region 58 is arranged in the y-axis direction in which the bus bar electrode 50 extends while overlapping with the bus bar electrode 50 in addition to the portion in FIG.
  • the conductive film adhesive 60 is disposed in a portion other than the portion where the second region 58 is disposed. 6B to 6B may be made on the back surface of the solar battery cell 10.
  • the manufacturing method of the solar cell module 100 is demonstrated.
  • the first protective member 40a, the first sealing member 42a, the solar battery cell 10, the second sealing member 42b, and the second protective member 40b are sequentially stacked from the positive direction of the z axis toward the negative direction.
  • a laminate is generated.
  • the conductive film adhesive 60 is pulled out from the roll of the conductive film adhesive 60 wound around the reel member, and used to bond the surface of the solar battery cell 10 and the inter-cell wiring member 18. Is done.
  • thermocompression bonding is performed for adhesion.
  • a laminate curing process is performed on the laminate.
  • air is extracted from the laminated body, and heated and pressurized to integrate the laminated body.
  • the terminal box 44 is attached to the second protective member 40b with an adhesive.
  • the conductive film adhesive 60 is disposed in the first region 56 in the connection region 54 on the surface of the solar battery cell 10 and the conductive film adhesive in the second region 58. Since 60 is not disposed, the amount of the conductive film adhesive 60 used can be reduced. Further, since the inter-cell wiring member 18 is brought into direct contact with the bus bar electrode 50 in a portion where the conductive film adhesive 60 is not disposed, it is possible to suppress a decrease in adhesive force. In addition, since the conductive film adhesive 60 is arranged side by side on both sides of the second region 58 without overlapping the bus bar electrode 50, the conductive film adhesive 60 is not arranged in one direction in which the bus bar electrode 50 extends. The amount of the conductive film adhesive 60 used can be reduced.
  • the conductive film adhesive 60 is disposed in the connection region 54 formed side by side on the both sides of the second region 58 and the conductive film adhesive 60 is bonded across the bus bar electrode 50, the conductive The amount of film adhesive 60 used can be reduced. Moreover, since the usage-amount of the electroconductive film adhesive 60 reduces, the manufacturing cost of the solar cell module 100 can be reduced.
  • the conductive film adhesive 60 is arranged in a corrugated shape, the amount of the conductive film adhesive 60 used can be reduced. Moreover, since the conductive film adhesive 60 is disposed in one direction in which the bus bar electrode 50 extends while straddling the bus bar electrode 50 a plurality of times, the amount of the conductive film adhesive 60 used can be reduced. Further, since the conductive film adhesive 60 is disposed in one direction in which the bus bar electrode 50 extends while straddling the bus bar electrode 50 a plurality of times, conductivity can be ensured even if the bus bar electrode 50 is displaced during bonding.
  • the conductive film adhesive 60 is discretely arranged in one direction in which the bus bar electrode 50 extends, the amount of the conductive film adhesive 60 used can be reduced. In addition, while disposing conductive film adhesive 60 in one direction in which bus bar electrode 50 extends, conductive film adhesive 60 is disposed in one direction in which bus bar electrode 50 extends, overlapping bus bar electrode 50. Therefore, the amount of the conductive film adhesive 60 used can be reduced. Moreover, since the usage-amount of the electroconductive film adhesive 60 reduces, the manufacturing cost of the solar cell module 100 can be reduced.
  • the solar cell module 100 includes a plurality of solar cells 10, an inter-cell wiring member 18 that electrically connects adjacent solar cells 10 among the plurality of solar cells 10, and an inter-cell A conductive film adhesive 60 is provided between the surface of the solar battery cell 10 to be connected by the wiring member 18 and the inter-cell wiring member 18.
  • the conductive film adhesive 60 is disposed in the first region 56 among the first region 56 and the second region 58 included in the connection region 54 to which the inter-cell wiring member 18 is to be connected on the surface of the solar battery cell 10.
  • the second region 58 is not arranged.
  • a bus bar electrode 50 extending in one direction is disposed on the surface of the solar battery cell 10, and the conductive film adhesive 60 is formed in one direction in which the bus bar electrode 50 extends while overlapping with the bus bar electrode 50. It may not be arranged in the region 58 and may be arranged in the first region 56 formed side by side on the both sides of the second region 58.
  • the conductive film adhesive 60 may be disposed in the first region 56 formed side by side on the both sides of the second region 58 and may be coupled across the bus bar electrode 50.
  • the conductive film adhesive 60 may be disposed in the first region 56 formed in a corrugated shape.
  • a bus bar electrode 50 extending in one direction is disposed on the surface of the solar battery cell 10, and the conductive film adhesive 60 is formed in one direction in which the bus bar electrode 50 extends while straddling the bus bar electrode 50 a plurality of times. It may be arranged in one area 56.
  • a bus bar electrode 50 extending in one direction is disposed on the surface of the solar battery cell 10, and the conductive film adhesive 60 is disposed in first regions 56 that are discretely formed in the one direction in which the bus bar electrode 50 extends. May be.
  • the conductive film adhesive 60 may not be arranged in the second region 58 formed in one direction in which the bus bar electrode 50 extends while overlapping with the bus bar electrode 50.
  • Another aspect of the present invention is a method for manufacturing the solar cell module 100.
  • the conductive film adhesive 60 is disposed on the surface of the solar battery cell 10, and the intercell wiring member 18 is adhered to the conductive film adhesive 60, whereby the surface of the solar battery cell 10 is adhered. Connecting the inter-cell wiring member 18.
  • the conductive film adhesive is formed in the first region 56 among the first region 56 and the second region 58 included in the connection region 54 to which the inter-cell wiring member 18 is connected on the surface of the solar battery cell 10. 60 is disposed, and the conductive film adhesive 60 is not disposed in the second region 58.
  • Example 2 is related to a solar cell module in which a plurality of solar cells are arranged in the same manner as Example 1.
  • the purpose is to suppress the decrease in adhesive force while reducing the amount of conductive film adhesive used to bond the surface of the solar battery cell and the bus bar electrode.
  • the arrangement of the conductive film adhesive in Example 2 is different from that in Example 1.
  • the solar cell module 100 according to the second embodiment is of the same type as that shown in FIGS. Below, it demonstrates focusing on a difference.
  • FIGS. 7A to 7B show the configuration of the solar battery cell 10 according to Example 2 of the present invention.
  • the vicinity of the bus bar electrode 50 arranged on the light receiving surface of the solar battery cell 10 is enlarged, as in FIGS. 6A to 6E.
  • the bus bar electrode 50 is arranged extending in the y-axis direction as before.
  • the conductive film adhesive 60 is disposed so as to extend in the y-axis direction inside the bus bar electrode 50 on the xy plane.
  • FIG. 7B is used to describe the configuration of the bus bar electrode 50 and the conductive film adhesive 60 in more detail.
  • FIG. 7B is a cross-sectional view of the solar battery cell 10 along the x-axis, and is a cross-sectional view taken along the line C-C ′ of FIG.
  • the bus bar electrode 50 is disposed on the light receiving surface of the solar battery cell 10.
  • the bus bar electrode 50 has a shape in which a central portion in the x-axis direction is recessed on the positive side of the z-axis. Further, the conductive film adhesive 60 is disposed in the recessed portion of the bus bar electrode 50.
  • the conductive film adhesive 60 is disposed at the central portion in the x-axis direction on the positive side of the z-axis of the bus bar electrode 50.
  • the conductive film adhesive 60 adheres to the inter-cell wiring member 18, and the z-axis positive side end of the bus bar electrode 50 is in contact with the inter-cell wiring member 18. As described above, the inter-cell wiring member 18 is connected to the bus bar electrode 50.
  • the amount of material used for the bus bar electrode 50 can be reduced.
  • the conductive film adhesive 60 is arrange

Abstract

This solar battery module includes a plurality of solar battery cells 10. An inter-cell wiring material 18 electrically connects solar battery cells 10 adjacent to each other among the solar battery cells 10. A conductive film adhesive 60 is disposed between the inter-cell wiring material 18 and the surfaces of the solar battery cells 10 to be connected by the solar battery cells 10. The conductive film adhesive 60 is disposed, of a first region 56 and a first region 56 included in a connection region 54 to which the inter-cell wiring material 18 is to be connected in the surfaces of the solar battery cells 10, in the first region 56 while not being disposed in the second region 58.

Description

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Solar cell module and method for manufacturing solar cell module
　本発明は、太陽電池モジュール、特に複数の太陽電池セルが配線材によって接続される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に関する。 The present invention relates to a solar cell module, particularly a solar cell module in which a plurality of solar cells are connected by a wiring material, and a method for manufacturing the solar cell module.
　太陽電池モジュールでは、複数の太陽電池セルが平面的にかつ面一に配置されている。各太陽電池セルの表面には導通材が配置されており、隣接した２つの太陽電池セルは、導通材および接続部材を介して電気的に接続される（例えば、特許文献１参照）。 In the solar cell module, a plurality of solar cells are arranged flat and flush with each other. A conductive material is disposed on the surface of each solar battery cell, and two adjacent solar battery cells are electrically connected via the conductive material and the connection member (see, for example, Patent Document 1).
特開２０１４－１９７７００号公報JP 2014-197700 A
　導通材として、例えば、導電性フィルム状接着剤が使用される。導電性フィルム状接着剤は一般的に高価であるので、太陽電池モジュールの製造コストを抑制するために、導電性フィルム状接着剤の使用量は少ない方が望ましい。一方、導電性フィルム状接着剤は、接続部材である配線材と、太陽電池セルの表面とを接着させるために使用されるので、使用量を少なくする場合であっても、接着力の低下を抑制すべきである。 As the conductive material, for example, a conductive film adhesive is used. Since the conductive film adhesive is generally expensive, it is desirable that the amount of the conductive film adhesive used is small in order to suppress the manufacturing cost of the solar cell module. On the other hand, since the conductive film adhesive is used to bond the wiring member as the connecting member and the surface of the solar battery cell, the adhesive strength is reduced even when the amount used is reduced. Should be suppressed.
　本発明はこうした状況に鑑みなされたものであり、その目的は、導電性フィルム状接着剤の使用量を減少させながら、接着力の低下を抑制する技術を提供することにある。 The present invention has been made in view of such a situation, and an object thereof is to provide a technique for suppressing a decrease in adhesive force while reducing the amount of conductive film adhesive used.
　上記課題を解決するために、本発明のある態様の太陽電池モジュールは、複数の太陽電池セルと、複数の太陽電池セルのうち、隣接した太陽電池セルを電気的に接続する配線材と、配線材によって接続すべき太陽電池セルの表面と、配線材との間に配置される導電性フィルム状接着剤とを備える。導電性フィルム状接着剤は、太陽電池セルの表面において配線材を接続すべき接続領域に含まれる第１領域と第２領域のうち、第１領域に配置されるとともに、第２領域に非配置である。 In order to solve the above problems, a solar cell module according to an aspect of the present invention includes a plurality of solar cells, a wiring material that electrically connects adjacent solar cells among the plurality of solar cells, and wiring A conductive film adhesive is provided between the surface of the solar cells to be connected by the material and the wiring material. The conductive film adhesive is disposed in the first region and not disposed in the second region among the first region and the second region included in the connection region to which the wiring material is to be connected on the surface of the solar battery cell. It is.
　本発明の別の態様は、太陽電池モジュールの製造方法である。この方法は、太陽電池セルの表面に導電性フィルム状接着剤を配置するステップと、導電性フィルム状接着剤に配線材を接着させることによって、太陽電池セルの表面に配線材を接続するステップとを備える。配置するステップでは、太陽電池セルの表面において配線材を接続すべき接続領域に含まれる第１領域と第２領域のうち、第１領域に導電性フィルム状接着剤を配置するとともに、第２領域に導電性フィルム状接着剤を非配置とする。 Another aspect of the present invention is a method for manufacturing a solar cell module. The method includes the steps of disposing a conductive film adhesive on the surface of the solar cell, connecting the wiring material to the surface of the solar cell by adhering the wiring material to the conductive film adhesive, and Is provided. In the arranging step, the conductive film adhesive is arranged in the first region among the first region and the second region included in the connection region to which the wiring material is to be connected on the surface of the solar battery cell, and the second region. The conductive film adhesive is not disposed.
　本発明によれば、導電性フィルム状接着剤の使用量を減少させながら、接着力の低下を抑制できる。 According to the present invention, it is possible to suppress a decrease in adhesive force while reducing the amount of conductive film adhesive used.
本発明の実施例１に係る太陽電池モジュールの構成の受光面側からの平面図である。It is a top view from the light-receiving surface side of the structure of the solar cell module which concerns on Example 1 of this invention. 図１の太陽電池モジュールの裏面側からの平面図である。It is a top view from the back surface side of the solar cell module of FIG. 図３（ａ）－（ｂ）は、図１の太陽電池セルの構成を示す平面図である。3A to 3B are plan views showing the configuration of the solar battery cell of FIG. 図１の太陽電池モジュールのｙ軸に沿った断面図である。It is sectional drawing along the y-axis of the solar cell module of FIG. 図５（ａ）－（ｃ）は、図３（ａ）の太陽電池セルのｘ軸に沿った断面図である。FIGS. 5A to 5C are cross-sectional views along the x-axis of the solar battery cell of FIG. 図６（ａ）－（ｅ）は、図３（ａ）の太陽電池セルのさまざまな構成を示す平面図である。6 (a) to 6 (e) are plan views showing various configurations of the solar battery cell of FIG. 3 (a). 図７（ａ）－（ｂ）は、本発明の実施例２に係る太陽電池セルの構成を示す図である。FIGS. 7A to 7B are diagrams showing the configuration of the solar battery cell according to Example 2 of the present invention.
（実施例１）
　本発明を具体的に説明する前に、概要を述べる。本発明の実施例１は、複数の太陽電池セルが配置された太陽電池モジュールに関する。各太陽電池セルの表面には、バスバー電極が配置される。また、太陽電池セルの表面には、導電性フィルム状接着剤を介して配線材が接着される。この接着によって、バスバー電極と配線材が電気的に接続される。さらに、配線材は、当該太陽電池セルに隣接した太陽電池セルにも接着されるので、隣接した２つの太陽電池セルが電気的に接続される。前述のごとく、導電性フィルム状接着剤は一般的に高価であるので、使用量の減少が求められる。また、導電性フィルム状接着剤は、太陽電池セルの表面と配線材とを接着するので、使用量の減少による接着力の低下を抑制する必要がある。導電性フィルム状接着剤の使用量を減少させながら、接着力の低下を抑制するために、本実施例に係る太陽電池モジュールは次のように構成される。 Example 1
Before describing the present invention in detail, an outline will be described. Example 1 of the present invention relates to a solar cell module in which a plurality of solar cells are arranged. A bus bar electrode is disposed on the surface of each solar battery cell. Moreover, a wiring material is adhere | attached on the surface of a photovoltaic cell via a conductive film adhesive. By this adhesion, the bus bar electrode and the wiring material are electrically connected. Furthermore, since the wiring material is also bonded to the solar cell adjacent to the solar cell, the two adjacent solar cells are electrically connected. As described above, since the conductive film adhesive is generally expensive, it is required to reduce the amount used. Moreover, since an electroconductive film adhesive adhere | attaches the surface of a photovoltaic cell, and a wiring material, it is necessary to suppress the fall of the adhesive force by the reduction of the usage-amount. In order to suppress a decrease in adhesive force while reducing the amount of conductive film adhesive used, the solar cell module according to this example is configured as follows.
　太陽電池セルの表面上に、配線材を接続すべき領域として接続領域が規定される。また、接続領域は、第１領域と第２領域とに分類される。ここで、第１領域は、導電性フィルム状接着剤を配置すべき領域であり、第２領域は、導電性フィルム状接着剤を非配置とすべき領域である。また、第２領域は、バスバー電極と重複するように、バスバー電極が延びる一方向に沿って形成され、第１領域は、第２領域の両側に並んで配置される。第１領域では、導電性フィルム状接着剤の接着力によって、太陽電池セルの表面と配線材とが接着される。一方、第２領域では、配線材がバースバー電極に直接接触することによって、バスバー電極と配線材との接続が保持される。なお、以下の説明において、「平行」、「直交」は、完全な平行、直交だけではなく、誤差の範囲で平行からずれている場合も含むものとする。また、「略」は、おおよその範囲で同一であるという意味である。 A connection area is defined on the surface of the solar battery cell as an area to which a wiring material is to be connected. The connection area is classified into a first area and a second area. Here, the first region is a region where the conductive film adhesive is to be disposed, and the second region is a region where the conductive film adhesive is not disposed. The second region is formed along one direction in which the bus bar electrode extends so as to overlap the bus bar electrode, and the first region is arranged side by side on both sides of the second region. In the first region, the surface of the solar battery cell and the wiring material are bonded by the adhesive force of the conductive film adhesive. On the other hand, in the second region, the connection between the bus bar electrode and the wiring material is maintained by the wiring material directly contacting the bar bar electrode. In the following description, “parallel” and “orthogonal” include not only perfect parallel and orthogonal, but also a case of deviating from parallel within an error range. Further, “substantially” means that they are the same in an approximate range.
　図１は、本発明の実施例１に係る太陽電池モジュール１００の構成の受光面側からの平面図である。図２は、太陽電池モジュール１００の裏面側からの平面図である。図１に示すように、ｘ軸、ｙ軸、ｚ軸からなる直交座標系が規定される。ｘ軸、ｙ軸は、太陽電池モジュール１００の平面内において互いに直交する。ｚ軸は、ｘ軸およびｙ軸に垂直であり、太陽電池モジュール１００の厚み方向に延びる。また、ｘ軸、ｙ軸、ｚ軸のそれぞれの正の方向は、図１における矢印の方向に規定され、負の方向は、矢印と逆向きの方向に規定される。太陽電池モジュール１００を形成する２つの主表面であって、かつｘ－ｙ平面に平行な２つの主表面のうち、ｚ軸の正方向側に配置される主平面が受光面であり、ｚ軸の負方向側に配置される主平面が裏面である。以下では、ｚ軸の正方向側を「受光面側」とよび、ｚ軸の負方向側を「裏面側」とよぶ。 FIG. 1 is a plan view from the light-receiving surface side of the configuration of the solar cell module 100 according to Example 1 of the present invention. FIG. 2 is a plan view from the back side of the solar cell module 100. As shown in FIG. 1, an orthogonal coordinate system including an x-axis, a y-axis, and a z-axis is defined. The x axis and the y axis are orthogonal to each other in the plane of the solar cell module 100. The z axis is perpendicular to the x axis and the y axis and extends in the thickness direction of the solar cell module 100. Further, the positive directions of the x-axis, y-axis, and z-axis are each defined in the direction of the arrow in FIG. 1, and the negative direction is defined in the direction opposite to the arrow. Of the two main surfaces forming the solar cell module 100 and parallel to the xy plane, the main plane arranged on the positive side of the z axis is the light receiving surface, and the z axis The main plane arranged on the negative direction side is the back surface. Hereinafter, the positive direction side of the z-axis is referred to as “light-receiving surface side”, and the negative direction side of the z-axis is referred to as “back surface side”.
　太陽電池モジュール１００は、太陽電池セル１０と総称される第１１太陽電池セル１０ａａ、・・・、第８４太陽電池セル１０ｈｄ、群間配線材１４、群端配線材１６、セル間配線材１８、終端配線材２０を含む。第１非発電領域３８ａと第２非発電領域３８ｂは、ｙ軸方向において、複数の太陽電池セル１０を挟むように配置される。具体的には、第１非発電領域３８ａは、複数の太陽電池セル１０よりもｙ軸の正方向側に配置され、第２非発電領域３８ｂは、複数の太陽電池セル１０よりもｙ軸の負方向側に配置される。第１非発電領域３８ａ、第２非発電領域３８ｂ（以下、「非発電領域３８」と総称することもある）は、矩形状を有し、太陽電池セル１０を含まない。 The solar cell module 100 includes eleventh solar cells 10aa, collectively referred to as solar cells 10, ..., 84th solar cell 10hd, inter-group wiring member 14, group end wiring member 16, inter-cell wiring member 18, A termination wiring member 20 is included. The first non-power generation region 38a and the second non-power generation region 38b are arranged so as to sandwich the plurality of solar cells 10 in the y-axis direction. Specifically, the first non-power generation region 38 a is arranged on the positive side of the y axis with respect to the plurality of solar cells 10, and the second non-power generation region 38 b is on the y axis with respect to the plurality of solar cells 10. It is arranged on the negative direction side. The first non-power generation region 38 a and the second non-power generation region 38 b (hereinafter, sometimes collectively referred to as “non-power generation region 38”) have a rectangular shape and do not include the solar battery cell 10.
　複数の太陽電池セル１０のそれぞれは、入射する光を吸収して光起電力を発生する。太陽電池セル１０は、例えば、結晶系シリコン、ガリウム砒素（ＧａＡｓ）またはインジウム燐（ＩｎＰ）等の半導体材料によって形成される。太陽電池セル１０の構造は、特に限定されないが、ここでは、一例として、結晶シリコンとアモルファスシリコンとが積層されているとする。 Each of the plurality of solar cells 10 absorbs incident light and generates photovoltaic power. The solar battery cell 10 is made of, for example, a semiconductor material such as crystalline silicon, gallium arsenide (GaAs), or indium phosphorus (InP). The structure of the solar battery cell 10 is not particularly limited, but here, as an example, it is assumed that crystalline silicon and amorphous silicon are stacked.
　図３（ａ）－（ｂ）は、太陽電池セル１０の構成を示す平面図である。図３（ａ）は、太陽電池セル１０の受光面を示し、図３（ｂ）は、太陽電池セル１０の裏面を示す。太陽電池セル１０の受光面および裏面には、互いに平行にｘ軸方向に延びる複数のフィンガー電極５２が配置される。また、太陽電池セル１０の受光面および裏面には、複数のフィンガー電極５２に直交するようにｙ軸方向に延びる複数、例えば３本のバスバー電極が配置される。バスバー電極５０は、複数のフィンガー電極５２のそれぞれを接続する。また、バスバー電極５０、フィンガー電極５２は、例えば、銀ペースト等により形成される。他の構成は後述し、図１、図２に戻る。 FIGS. 3A to 3B are plan views showing the configuration of the solar battery cell 10. FIG. 3A shows the light receiving surface of the solar battery cell 10, and FIG. 3B shows the back surface of the solar battery cell 10. A plurality of finger electrodes 52 extending in the x-axis direction are arranged in parallel with each other on the light receiving surface and the back surface of the solar battery cell 10. Further, a plurality of, for example, three bus bar electrodes extending in the y-axis direction so as to be orthogonal to the plurality of finger electrodes 52 are disposed on the light receiving surface and the back surface of the solar battery cell 10. The bus bar electrode 50 connects each of the plurality of finger electrodes 52. The bus bar electrode 50 and the finger electrode 52 are formed of, for example, silver paste. Other configurations will be described later, and the description returns to FIGS. 1 and 2.
　複数の太陽電池セル１０は、ｘ－ｙ平面上にマトリクス状に配列される。ここでは、一例として、ｘ軸方向に８つの太陽電池セル１０が並べられ、ｙ軸方向に４つの太陽電池セル１０が並べられる。なお、ｘ軸方向に並べられる太陽電池セル１０の数と、ｙ軸方向に並べられる太陽電池セル１０の数は、これに限定されない。ｙ軸方向に並んで配置される４つの太陽電池セル１０は、セル間配線材１８によって直列に接続され、１つの太陽電池群１２が形成される。例えば、第１１太陽電池セル１０ａａ、第１２太陽電池セル１０ａｂ、第１３太陽電池セル１０ａｃ、第１４太陽電池セル１０ａｄが接続されることによって、第１太陽電池群１２ａが形成される。他の太陽電池群１２、例えば、第２太陽電池群１２ｂから第８太陽電池群１２ｈも同様に形成される。その結果、８つの太陽電池群１２がｘ軸方向に平行に並べられる。また、太陽電池群１２がストリングに相当する。 The plurality of solar cells 10 are arranged in a matrix on the xy plane. Here, as an example, eight solar cells 10 are arranged in the x-axis direction, and four solar cells 10 are arranged in the y-axis direction. In addition, the number of the photovoltaic cells 10 arranged in the x-axis direction and the number of the photovoltaic cells 10 arranged in the y-axis direction are not limited to this. The four solar cells 10 arranged side by side in the y-axis direction are connected in series by the inter-cell wiring member 18 to form one solar cell group 12. For example, the first solar cell group 12a is formed by connecting the eleventh solar cell 10aa, the twelfth solar cell 10ab, the thirteenth solar cell 10ac, and the fourteenth solar cell 10ad. Other solar cell groups 12, for example, the second solar cell group 12b to the eighth solar cell group 12h are formed in the same manner. As a result, the eight solar cell groups 12 are arranged in parallel in the x-axis direction. The solar cell group 12 corresponds to a string.
　太陽電池群１２を形成するために、セル間配線材１８は、隣接した太陽電池セル１０のうちの一方の受光面側のバスバー電極５０と、他方の裏面側のバスバー電極５０とを接続する。例えば、第１１太陽電池セル１０ａａと第１２太陽電池セル１０ａｂとを接続するための２つのセル間配線材１８は、第１１太陽電池セル１０ａａの裏面側のバスバー電極５０と第１２太陽電池セル１０ａｂの受光面側のバスバー電極５０とを電気的に接続する。図３（ａ）－（ｂ）において、各バスバー電極５０に重なられるようにセル間配線材１８が配置される。太陽電池セル１０の受光面および裏面におけるセル間配線材１８の接続については後述し、図１、図２に戻る。 In order to form the solar cell group 12, the inter-cell wiring member 18 connects the bus bar electrode 50 on one light receiving surface side of the adjacent solar cells 10 and the bus bar electrode 50 on the other back surface side. For example, the two inter-cell wiring members 18 for connecting the eleventh solar cell 10aa and the twelfth solar cell 10ab are the bus bar electrode 50 on the back surface side of the eleventh solar cell 10aa and the twelfth solar cell 10ab. Are electrically connected to the bus bar electrode 50 on the light receiving surface side. 3A and 3B, the inter-cell wiring member 18 is disposed so as to overlap the bus bar electrodes 50. In FIG. Connection of the inter-cell wiring member 18 on the light receiving surface and the back surface of the solar battery cell 10 will be described later, and the description returns to FIGS. 1 and 2.
　７つの群間配線材１４のうちの３つが、第１非発電領域３８ａに配置され、残りの４つが、第２非発電領域３８ｂに配置される。７つの群間配線材１４のそれぞれは、ｘ軸方向に延びて、群端配線材１６を介して互いに隣接する２つの太陽電池群１２に電気的に接続される。例えば、第１太陽電池群１２ａの第２非発電領域３８ｂ側に位置する第１４太陽電池セル１０ａｄ、第２太陽電池群１２ｂの第２非発電領域３８ｂ側に位置する第２４太陽電池セル１０ｂｄのそれぞれは、群端配線材１６を介して群間配線材１４に電気的に接続される。ここで、群端配線材１６は、太陽電池セル１０の受光面あるいは裏面において、セル間配線材１８と同様に配置される。 Three of the seven inter-group wiring members 14 are arranged in the first non-power generation area 38a, and the remaining four are arranged in the second non-power generation area 38b. Each of the seven inter-group wiring members 14 extends in the x-axis direction and is electrically connected to two adjacent solar cell groups 12 via the group end wiring member 16. For example, the fourteenth solar cell 10ad located on the second non-power generation region 38b side of the first solar cell group 12a and the twenty-fourth solar cell 10bd located on the second non-power generation region 38b side of the second solar cell group 12b. Each is electrically connected to the inter-group wiring member 14 via the group end wiring member 16. Here, the group end wiring member 16 is arranged in the same manner as the inter-cell wiring member 18 on the light receiving surface or the back surface of the solar battery cell 10.
　ｘ軸方向の両端に位置する第１太陽電池群１２ａ、第８太陽電池群１２ｈには、終端配線材２０が接続される。第１太陽電池群１２ａに接続される終端配線材２０は、第１１太陽電池セル１０ａａの受光面側から第１非発電領域３８ａの方向に延びている。終端配線材２０には、正負一対の取出し配線が接続されている。 The termination wiring member 20 is connected to the first solar cell group 12a and the eighth solar cell group 12h located at both ends in the x-axis direction. The termination wiring member 20 connected to the first solar cell group 12a extends in the direction of the first non-power generation region 38a from the light receiving surface side of the eleventh solar cell 10aa. A pair of positive and negative lead wires is connected to the termination wiring member 20.
　図４は、太陽電池モジュール１００のｙ軸に沿った断面図であり、図１のＡ－Ａ’断面図である。太陽電池モジュール１００は、太陽電池セル１０と総称される第１１太陽電池セル１０ａａ、第１２太陽電池セル１０ａｂ、第１３太陽電池セル１０ａｃ、第１４太陽電池セル１０ａｄ、群間配線材１４、群端配線材１６、セル間配線材１８、終端配線材２０、取出し配線３０、保護部材４０と総称される第１保護部材４０ａ、第２保護部材４０ｂ、封止部材４２と総称される第１封止部材４２ａ、第２封止部材４２ｂ、端子ボックス４４を含む。図４の上側が裏面側に相当し、下側が受光面側に相当する。 FIG. 4 is a cross-sectional view taken along the y-axis of the solar cell module 100, and is a cross-sectional view taken along the line A-A ′ of FIG. The solar cell module 100 includes an eleventh solar cell 10aa, a twelfth solar cell 10ab, a thirteenth solar cell 10ac, a fourteenth solar cell 10ad, an inter-group wiring member 14, and a group end. Wiring material 16, inter-cell wiring material 18, termination wiring material 20, take-out wiring 30, first protective member 40a, second protective member 40b, collectively referred to as protective member 40, and first sealing, collectively referred to as sealing member 42 A member 42a, a second sealing member 42b, and a terminal box 44 are included. The upper side in FIG. 4 corresponds to the back side, and the lower side corresponds to the light receiving side.
　第１保護部材４０ａは、太陽電池モジュール１００の受光面側に配置されており、太陽電池モジュール１００の表面を保護する。第１保護部材４０ａには、透光性および遮水性を有するガラス、透光性プラスチック等が使用され、矩形板状に形成される。第１封止部材４２ａは、第１保護部材４０ａの裏面側に積層される。第１封止部材４２ａは、第１保護部材４０ａと太陽電池セル１０との間に配置されて、これらを接着する。第１封止部材４２ａとして、例えば、ポリオレフィン、ＥＶＡ、ＰＶＢ（ポリビニルブチラール）、ポリイミド等の樹脂フィルムのような熱可塑性樹脂が使用される。なお、熱硬化性樹脂が使用されてもよい。第１封止部材４２ａは、透光性を有するとともに、第１保護部材４０ａにおけるｘ－ｙ平面と略同一寸法の面を有する矩形状のシート材によって形成される。 The first protective member 40 a is disposed on the light receiving surface side of the solar cell module 100 and protects the surface of the solar cell module 100. The first protective member 40a is made of a light-transmitting and water-blocking glass, a light-transmitting plastic, or the like, and is formed in a rectangular plate shape. The 1st sealing member 42a is laminated | stacked on the back surface side of the 1st protection member 40a. The 1st sealing member 42a is arrange | positioned between the 1st protection member 40a and the photovoltaic cell 10, and adhere | attaches these. As the first sealing member 42a, for example, a thermoplastic resin such as a resin film of polyolefin, EVA, PVB (polyvinyl butyral), polyimide, or the like is used. A thermosetting resin may be used. The first sealing member 42a is formed of a rectangular sheet material having translucency and having a surface having substantially the same dimensions as the xy plane of the first protection member 40a.
　第２封止部材４２ｂは、第１封止部材４２ａの裏面側に積層される。第２封止部材４２ｂは、第１封止部材４２ａとの間で、複数の太陽電池セル１０、セル間配線材１８等を封止する。第２封止部材４２ｂは、第１封止部材４２ａと同様のものを用いることができる。また、ラミネート・キュア工程における加熱によって、第２封止部材４２ｂは第１封止部材４２ａと一体化されていてもよい。 The second sealing member 42b is laminated on the back side of the first sealing member 42a. The second sealing member 42b seals the plurality of solar cells 10, the inter-cell wiring member 18 and the like with the first sealing member 42a. The 2nd sealing member 42b can use the thing similar to the 1st sealing member 42a. The second sealing member 42b may be integrated with the first sealing member 42a by heating in the laminating / curing process.
　第２保護部材４０ｂは、第２封止部材４２ｂの裏面側に積層される。第２保護部材４０ｂは、バックシートとして太陽電池モジュール１００の裏面側を保護する。第２保護部材４０ｂとしては、ＰＥＴ（ポリエチレンテレフタラート）等の樹脂フィルム、Ａｌ箔を樹脂フィルムで挟んだ構造を有する積層フィルムなどが使用される。第２保護部材４０ｂには、ｚ軸方向に貫通した開口部（図示せず）が設けられる。 The second protective member 40b is laminated on the back side of the second sealing member 42b. The 2nd protection member 40b protects the back surface side of the solar cell module 100 as a back sheet. As the second protective member 40b, a resin film such as PET (polyethylene terephthalate), a laminated film having a structure in which an Al foil is sandwiched between resin films, and the like are used. The second protective member 40b is provided with an opening (not shown) penetrating in the z-axis direction.
　端子ボックス４４は、直方体状に形成され、第２保護部材４０ｂの開口部（図示せず）を覆うように、第２保護部材４０ｂの裏面側から、シリコーンなどの接着剤を使用して接着される。取出し配線３０は、端子ボックス４４に格納されているバイパスダイオード（不図示）に導かれている。ここで端子ボックス４４は、例えば、第２保護部材４０ｂ上において、第４１太陽電池セル１０ｄａ、第５１太陽電池セル１０ｅａにオーバーラップする位置に配置される。太陽電池モジュール１００の周囲には、Ａｌフレーム枠が取り付けられてもよい。 The terminal box 44 is formed in a rectangular parallelepiped shape, and is bonded from the back surface side of the second protective member 40b using an adhesive such as silicone so as to cover the opening (not shown) of the second protective member 40b. The The lead-out wiring 30 is led to a bypass diode (not shown) stored in the terminal box 44. Here, the terminal box 44 is arrange | positioned in the position which overlaps with the 41st photovoltaic cell 10da and the 51st photovoltaic cell 10ea, for example on the 2nd protection member 40b. An Al frame frame may be attached around the solar cell module 100.
　このような太陽電池モジュール１００の構成をもとにして、以下では、太陽電池セル１０の表面と、セル間配線材１８との接着をさらに詳細に説明する。図３（ａ）では、太陽電池セル１０の受光面においてセル間配線材１８を接続すべき領域が、接続領域５４として示される。図３（ａ）は、太陽電池セル１０を受光面側から見た場合の構成であるので、図３（ａ）において、セル間配線材１８と接続領域５４は一致する。また、接続領域５４は、第１領域５６と第２領域５８に分けられる。第１領域５６は、導電性フィルム状接着剤６０を配置すべき領域であり、第２領域５８は、導電性フィルム状接着剤６０を非配置とすべき領域である。ここで、第２領域５８は、バスバー電極５０と重複しながら、バスバー電極５０が延びるｙ軸方向に形成される。また、第２領域５８のｘ軸方向の幅は、バスバー電極５０のｘ軸方向の幅よりも広くされる。一方、第１領域５６は、第２領域５８の両側に並んで、ｙ軸方向に延びるように形成される Based on the configuration of the solar cell module 100, the adhesion between the surface of the solar cell 10 and the inter-cell wiring member 18 will be described in more detail below. In FIG. 3A, a region to which the inter-cell wiring member 18 is connected on the light receiving surface of the solar battery cell 10 is shown as a connection region 54. 3A is a configuration when the solar battery cell 10 is viewed from the light receiving surface side, and therefore, the inter-cell wiring member 18 and the connection region 54 coincide with each other in FIG. The connection area 54 is divided into a first area 56 and a second area 58. The first region 56 is a region where the conductive film adhesive 60 is to be disposed, and the second region 58 is a region where the conductive film adhesive 60 is not disposed. Here, the second region 58 is formed in the y-axis direction in which the bus bar electrode 50 extends while overlapping with the bus bar electrode 50. The width of the second region 58 in the x-axis direction is made wider than the width of the bus bar electrode 50 in the x-axis direction. On the other hand, the first region 56 is formed to extend in the y-axis direction along with both sides of the second region 58.
　導電性フィルム状接着剤６０は、前述のごとく、第１領域５６に配置され、第２領域５８に配置されない。導電性フィルム状接着剤６０は、アクリル系ポリマーおよび熱硬化性樹脂を含有する高分子樹脂である。また、導電性フィルム状接着剤６０は、導電粒子も含んでおり、異方導電性を有する。このような導電性フィルム状接着剤６０による太陽電池セル１０の受光面とセル間配線材１８との接着を説明するために、図５（ａ）－（ｃ）を使用する。図５（ａ）－（ｃ）は、太陽電池セル１０のｘ軸に沿った断面図であり、図３（ａ）のＢ－Ｂ’断面図である。これらでは、図３（ａ）に示された３つのバスバー電極５０のうちの１つの近傍が拡大されている。 As described above, the conductive film adhesive 60 is disposed in the first region 56 and is not disposed in the second region 58. The conductive film adhesive 60 is a polymer resin containing an acrylic polymer and a thermosetting resin. The conductive film adhesive 60 also includes conductive particles and has anisotropic conductivity. In order to describe the adhesion between the light receiving surface of the solar battery cell 10 and the inter-cell wiring member 18 by the conductive film adhesive 60, FIGS. 5A to 5C are used. FIGS. 5A to 5C are cross-sectional views taken along the x-axis of the solar battery cell 10, and are cross-sectional views taken along the line B-B ′ of FIG. In these, the vicinity of one of the three bus bar electrodes 50 shown in FIG. 3A is enlarged.
　図５（ａ）では、太陽電池セル１０の受光面におけるバスバー電極５０を含むように第２領域５８が配置される。また、太陽電池セル１０の受光面における第１領域５６に導電性フィルム状接着剤６０が配置される。導電性フィルム状接着剤６０は、ｚ軸方向において、太陽電池セル１０の受光面と、セル間配線材１８とを接着するために、両者の間に配置される。ここでは、熱圧着により接着がなされる。一方、バスバー電極５０とセル間配線材１８は、ｚ軸方向において直接接触する。特に、セル間配線材１８はバスバー電極５０に直接接触しているので、導電性フィルム状接着剤６０を介さなくても、両者の間の接着力は確保され、両者の接続が保持される。 In FIG. 5A, the second region 58 is disposed so as to include the bus bar electrode 50 on the light receiving surface of the solar battery cell 10. Moreover, the conductive film adhesive 60 is arrange | positioned in the 1st area | region 56 in the light-receiving surface of the photovoltaic cell 10. As shown in FIG. The conductive film adhesive 60 is disposed between the light receiving surface of the solar battery cell 10 and the inter-cell wiring member 18 in the z-axis direction in order to bond the light receiving surface. Here, the bonding is performed by thermocompression bonding. On the other hand, the bus bar electrode 50 and the inter-cell wiring member 18 are in direct contact with each other in the z-axis direction. In particular, since the inter-cell wiring member 18 is in direct contact with the bus bar electrode 50, the adhesive force between the two is ensured and the connection between the two is maintained without using the conductive film adhesive 60.
　図５（ｂ）は、図５（ａ）の太陽電池セル１０の比較対象となる太陽電池セル１１０の構成を示す断面図であり、これまでの一般的な構成を示す。図示のごとく、導電性フィルム状接着剤６０は、バスバー電極５０を囲むように、ｚ軸方向において、接続領域５４とセル間配線材１８の間に全体的に配置される。このような太陽電池セル１１０と比較して、図５（ａ）の太陽電池セル１０では、ｘ軸方向およびｚ軸方向において、導電性フィルム状接着剤６０の使用量が減少している。 FIG.5 (b) is sectional drawing which shows the structure of the photovoltaic cell 110 used as the comparison object of the photovoltaic cell 10 of Fig.5 (a), and shows the conventional general structure. As illustrated, the conductive film adhesive 60 is entirely disposed between the connection region 54 and the inter-cell wiring member 18 in the z-axis direction so as to surround the bus bar electrode 50. Compared to such a solar battery cell 110, in the solar battery cell 10 of FIG. 5A, the amount of the conductive film adhesive 60 used is reduced in the x-axis direction and the z-axis direction.
　図５（ｃ）は、図５（ａ）とは異なった導電性フィルム状接着剤６０の配置を示す。図５（ｃ）において、第１領域５６、第２領域５８、バスバー電極５０は、図５（ａ）と同様に配置される。導電性フィルム状接着剤６０は、第２領域５８に配置されず、第１領域５６のみに配置されるが、ｚ軸の正方向側においてバスバー電極５０をまたいで結合する。セル間配線材１８と導電性フィルム状接着剤６０とが、ｘ軸方向において全面的に接するので、接着力が強化される。一方、図５（ｂ）の太陽電池セル１１０と比較して、図５（ｃ）の太陽電池セル１０では、ｘ軸方向において、導電性フィルム状接着剤６０の使用量が減少している。 FIG. 5C shows an arrangement of the conductive film adhesive 60 different from that shown in FIG. In FIG.5 (c), the 1st area | region 56, the 2nd area | region 58, and the bus-bar electrode 50 are arrange | positioned similarly to Fig.5 (a). The conductive film adhesive 60 is not disposed in the second region 58 and is disposed only in the first region 56, but bonds across the bus bar electrode 50 on the positive side of the z axis. Since the inter-cell wiring member 18 and the conductive film adhesive 60 are in full contact with each other in the x-axis direction, the adhesive force is strengthened. On the other hand, compared with the solar battery cell 110 in FIG. 5B, the usage amount of the conductive film adhesive 60 is reduced in the x-axis direction in the solar battery cell 10 in FIG.
　これまでは、図３（ａ）、図５（ａ）－（ｃ）をもとに、太陽電池セル１０の受光面における導電性フィルム状接着剤６０の配置を説明した。一方、図３（ｂ）のように、太陽電池セル１０の裏面側においても、導電性フィルム状接着剤６０が、同様に配置される。 So far, the arrangement of the conductive film adhesive 60 on the light receiving surface of the solar battery cell 10 has been described based on FIGS. 3 (a) and 5 (a)-(c). On the other hand, as shown in FIG. 3B, the conductive film adhesive 60 is similarly disposed on the back surface side of the solar battery cell 10.
　以下では、導電性フィルム状接着剤６０、つまり第１領域５６のさまざまな配置を説明する。図６（ａ）－（ｅ）は、太陽電池セル１０のさまざまな構成を示す平面図である。これらにおいて、太陽電池セル１０の受光面に配置されたバスバー電極５０の近傍が拡大されている。また、図面を明瞭にするために、導電性フィルム状接着剤６０の配置と第１領域５６とが同一であるとして、導電性フィルム状接着剤６０のみが示される。 Hereinafter, various arrangements of the conductive film adhesive 60, that is, the first region 56 will be described. FIGS. 6A to 6E are plan views showing various configurations of the solar battery cell 10. In these, the vicinity of the bus-bar electrode 50 arrange | positioned at the light-receiving surface of the photovoltaic cell 10 is expanded. For the sake of clarity, only the conductive film adhesive 60 is shown assuming that the arrangement of the conductive film adhesive 60 and the first region 56 are the same.
　図６（ａ）は図３（ａ）と同様に示されており、これは、図６（ｂ）－（ｅ）との比較対象である。図６（ｂ）では、接続領域５４内において、導電性フィルム状接着剤６０は、ｙ軸方向に延びながらも、波形形状に配置される。そのため、第１領域５６も、波形形状に形成されるといえる。また、接続領域５４には、導電性フィルム状接着剤６０が配置される部分以外の部分において、第２領域５８が配置される。 FIG. 6 (a) is shown in the same manner as FIG. 3 (a), which is a comparison object with FIG. 6 (b)-(e). In FIG. 6B, the conductive film adhesive 60 is disposed in a wavy shape in the connection region 54 while extending in the y-axis direction. Therefore, it can be said that the first region 56 is also formed in a waveform shape. Further, in the connection region 54, the second region 58 is disposed in a portion other than the portion where the conductive film adhesive 60 is disposed.
　図６（ｃ）では、接続領域５４内において、導電性フィルム状接着剤６０は、バスバー電極５０を複数回またぎながら、バスバー電極５０が延びるｙ軸方向に配置される。つまり、導電性フィルム状接着剤６０は、接続領域５４のｘ軸方向の幅において、バスバー電極５０をまたぎながら、ｘ軸の正方向と負方向とに交互に延び、かつｙ軸方向にも延びる。これはジグザグ形状といえる。また、接続領域５４には、導電性フィルム状接着剤６０が配置される部分以外の部分において、第２領域５８が配置される。 6C, in the connection region 54, the conductive film adhesive 60 is disposed in the y-axis direction in which the bus bar electrode 50 extends while straddling the bus bar electrode 50 a plurality of times. That is, the conductive film adhesive 60 alternately extends in the positive and negative directions of the x-axis and also extends in the y-axis direction across the bus bar electrode 50 in the width of the connection region 54 in the x-axis direction. . This is a zigzag shape. Further, in the connection region 54, the second region 58 is disposed in a portion other than the portion where the conductive film adhesive 60 is disposed.
　図６（ｄ）では、接続領域５４内において、導電性フィルム状接着剤６０は、バスバー電極５０が延びるｙ軸方向において離散的に配置される。つまり、導電性フィルム状接着剤６０は、ｙ軸方向よりもｘ軸方向に長い矩形状の部分を複数含み、これらがｙ軸方向に離散的に配置される。また、接続領域５４において、導電性フィルム状接着剤６０が配置される部分以外の部分において、第２領域５８も離散的に配置される。 6D, in the connection region 54, the conductive film adhesive 60 is discretely arranged in the y-axis direction in which the bus bar electrode 50 extends. That is, the conductive film adhesive 60 includes a plurality of rectangular portions that are longer in the x-axis direction than in the y-axis direction, and these are discretely arranged in the y-axis direction. Moreover, in the connection area | region 54, the 2nd area | region 58 is also discretely arrange | positioned in parts other than the part in which the electroconductive film adhesive 60 is arrange | positioned.
　図６（ｅ）では、接続領域５４内において、第２領域５８が、図６（ａ）と図６（ｄ）とを組み合わせた部分に配置される。つまり、第２領域５８は、図６（ｄ）での部分に加えて、バスバー電極５０と重複しながら、バスバー電極５０が延びるｙ軸方向にも配置される。導電性フィルム状接着剤６０は、第２領域５８が配置される部分以外の部分に配置される。なお、図６（ｂ）－（ｂ）の構成は、太陽電池セル１０の裏面においてなされてもよい。 6E, in the connection area 54, the second area 58 is arranged at a portion where FIG. 6A and FIG. 6D are combined. That is, the second region 58 is arranged in the y-axis direction in which the bus bar electrode 50 extends while overlapping with the bus bar electrode 50 in addition to the portion in FIG. The conductive film adhesive 60 is disposed in a portion other than the portion where the second region 58 is disposed. 6B to 6B may be made on the back surface of the solar battery cell 10.
　以下では、太陽電池モジュール１００の製造方法について説明する。まず、ｚ軸の正方向から負方向に向かって、第１保護部材４０ａ、第１封止部材４２ａ、太陽電池セル１０、第２封止部材４２ｂ、第２保護部材４０ｂが順に重ね合わせられることによって、積層体が生成される。その際、リール部材に巻き取られた導電性フィルム状接着剤６０のロールから導電性フィルム状接着剤６０が引き出され、太陽電池セル１０の表面とセル間配線材１８とを接着するために使用される。また、接着のために、熱圧着が実行される。 Below, the manufacturing method of the solar cell module 100 is demonstrated. First, the first protective member 40a, the first sealing member 42a, the solar battery cell 10, the second sealing member 42b, and the second protective member 40b are sequentially stacked from the positive direction of the z axis toward the negative direction. Thus, a laminate is generated. At that time, the conductive film adhesive 60 is pulled out from the roll of the conductive film adhesive 60 wound around the reel member, and used to bond the surface of the solar battery cell 10 and the inter-cell wiring member 18. Is done. Moreover, thermocompression bonding is performed for adhesion.
　これに続いて、積層体に対して、ラミネート・キュア工程がなされる。この工程では、積層体から空気を抜き、加熱、加圧して、積層体を一体化する。さらに、第２保護部材４０ｂに対して、端子ボックス４４が接着剤にて取り付けられる。 Following this, a laminate curing process is performed on the laminate. In this step, air is extracted from the laminated body, and heated and pressurized to integrate the laminated body. Furthermore, the terminal box 44 is attached to the second protective member 40b with an adhesive.
　本発明の実施例によれば、太陽電池セル１０の表面における接続領域５４のうち、第１領域５６に導電性フィルム状接着剤６０を配置するとともに、第２領域５８に導電性フィルム状接着剤６０を配置しないので、導電性フィルム状接着剤６０の使用量を減少できる。また、導電性フィルム状接着剤６０を配置しない部分において、バスバー電極５０にセル間配線材１８を直接接触させるので、接着力の低下を抑制できる。また、バスバー電極５０と重複しながら、バスバー電極５０が延びる一方向に導電性フィルム状接着剤６０を配置せず、第２領域５８の両側に並んで導電性フィルム状接着剤６０を配置するので、導電性フィルム状接着剤６０の使用量を減少できる。また、第２領域５８の両側に並んで形成される接続領域５４に導電性フィルム状接着剤６０を配置し、かつバスバー電極５０をまたいで導電性フィルム状接着剤６０を結合するので、導電性フィルム状接着剤６０の使用量を減少できる。また、導電性フィルム状接着剤６０の使用量が減少するので、太陽電池モジュール１００の製造コストを低減できる。 According to the embodiment of the present invention, the conductive film adhesive 60 is disposed in the first region 56 in the connection region 54 on the surface of the solar battery cell 10 and the conductive film adhesive in the second region 58. Since 60 is not disposed, the amount of the conductive film adhesive 60 used can be reduced. Further, since the inter-cell wiring member 18 is brought into direct contact with the bus bar electrode 50 in a portion where the conductive film adhesive 60 is not disposed, it is possible to suppress a decrease in adhesive force. In addition, since the conductive film adhesive 60 is arranged side by side on both sides of the second region 58 without overlapping the bus bar electrode 50, the conductive film adhesive 60 is not arranged in one direction in which the bus bar electrode 50 extends. The amount of the conductive film adhesive 60 used can be reduced. In addition, since the conductive film adhesive 60 is disposed in the connection region 54 formed side by side on the both sides of the second region 58 and the conductive film adhesive 60 is bonded across the bus bar electrode 50, the conductive The amount of film adhesive 60 used can be reduced. Moreover, since the usage-amount of the electroconductive film adhesive 60 reduces, the manufacturing cost of the solar cell module 100 can be reduced.
　また、導電性フィルム状接着剤６０を波形形状に配置するので、導電性フィルム状接着剤６０の使用量を減少できる。また、バスバー電極５０を複数回またぎながら、バスバー電極５０が延びる一方向に導電性フィルム状接着剤６０を配置するので、導電性フィルム状接着剤６０の使用量を減少できる。また、バスバー電極５０を複数回またぎながら、バスバー電極５０が延びる一方向に導電性フィルム状接着剤６０を配置するので、バスバー電極５０が接着時にずれたとしても、導電性を確保できる。また、バスバー電極５０が延びる一方向において離散的に導電性フィルム状接着剤６０を配置するので、導電性フィルム状接着剤６０の使用量を減少できる。また、バスバー電極５０が延びる一方向において離散的に導電性フィルム状接着剤６０を配置しながら、バスバー電極５０と重複して、バスバー電極５０が延びる一方向に導電性フィルム状接着剤６０を配置しないので、導電性フィルム状接着剤６０の使用量を減少できる。また、導電性フィルム状接着剤６０の使用量が減少するので、太陽電池モジュール１００の製造コストを低減できる。 Further, since the conductive film adhesive 60 is arranged in a corrugated shape, the amount of the conductive film adhesive 60 used can be reduced. Moreover, since the conductive film adhesive 60 is disposed in one direction in which the bus bar electrode 50 extends while straddling the bus bar electrode 50 a plurality of times, the amount of the conductive film adhesive 60 used can be reduced. Further, since the conductive film adhesive 60 is disposed in one direction in which the bus bar electrode 50 extends while straddling the bus bar electrode 50 a plurality of times, conductivity can be ensured even if the bus bar electrode 50 is displaced during bonding. Moreover, since the conductive film adhesive 60 is discretely arranged in one direction in which the bus bar electrode 50 extends, the amount of the conductive film adhesive 60 used can be reduced. In addition, while disposing conductive film adhesive 60 in one direction in which bus bar electrode 50 extends, conductive film adhesive 60 is disposed in one direction in which bus bar electrode 50 extends, overlapping bus bar electrode 50. Therefore, the amount of the conductive film adhesive 60 used can be reduced. Moreover, since the usage-amount of the electroconductive film adhesive 60 reduces, the manufacturing cost of the solar cell module 100 can be reduced.
　本実施例の概要は、次の通りである。本発明のある態様の太陽電池モジュール１００は、複数の太陽電池セル１０と、複数の太陽電池セル１０のうち、隣接した太陽電池セル１０を電気的に接続するセル間配線材１８と、セル間配線材１８によって接続すべき太陽電池セル１０の表面と、セル間配線材１８との間に配置される導電性フィルム状接着剤６０とを備える。導電性フィルム状接着剤６０は、太陽電池セル１０の表面においてセル間配線材１８を接続すべき接続領域５４に含まれる第１領域５６と第２領域５８のうち、第１領域５６に配置されるとともに、第２領域５８に非配置である。 The outline of this example is as follows. The solar cell module 100 according to an aspect of the present invention includes a plurality of solar cells 10, an inter-cell wiring member 18 that electrically connects adjacent solar cells 10 among the plurality of solar cells 10, and an inter-cell A conductive film adhesive 60 is provided between the surface of the solar battery cell 10 to be connected by the wiring member 18 and the inter-cell wiring member 18. The conductive film adhesive 60 is disposed in the first region 56 among the first region 56 and the second region 58 included in the connection region 54 to which the inter-cell wiring member 18 is to be connected on the surface of the solar battery cell 10. In addition, the second region 58 is not arranged.
　太陽電池セル１０の表面には、一方向に延びるバスバー電極５０が配置され、導電性フィルム状接着剤６０は、バスバー電極５０と重複しながら、バスバー電極５０が延びる一方向に形成される第２領域５８に非配置であり、第２領域５８の両側に並んで形成される第１領域５６に配置されてもよい。 A bus bar electrode 50 extending in one direction is disposed on the surface of the solar battery cell 10, and the conductive film adhesive 60 is formed in one direction in which the bus bar electrode 50 extends while overlapping with the bus bar electrode 50. It may not be arranged in the region 58 and may be arranged in the first region 56 formed side by side on the both sides of the second region 58.
　導電性フィルム状接着剤６０は、第２領域５８の両側に並んで形成される第１領域５６に配置されるとともに、バスバー電極５０をまたいで結合してもよい。 The conductive film adhesive 60 may be disposed in the first region 56 formed side by side on the both sides of the second region 58 and may be coupled across the bus bar electrode 50.
　導電性フィルム状接着剤６０は、波形形状に形成される第１領域５６に配置されてもよい。 The conductive film adhesive 60 may be disposed in the first region 56 formed in a corrugated shape.
　太陽電池セル１０の表面には、一方向に延びるバスバー電極５０が配置され、導電性フィルム状接着剤６０は、バスバー電極５０を複数回またぎながら、バスバー電極５０が延びる一方向に形成される第１領域５６に配置されてもよい。 A bus bar electrode 50 extending in one direction is disposed on the surface of the solar battery cell 10, and the conductive film adhesive 60 is formed in one direction in which the bus bar electrode 50 extends while straddling the bus bar electrode 50 a plurality of times. It may be arranged in one area 56.
　太陽電池セル１０の表面には、一方向に延びるバスバー電極５０が配置され、導電性フィルム状接着剤６０は、バスバー電極５０が延びる一方向において離散的に形成される第１領域５６に配置されてもよい。 A bus bar electrode 50 extending in one direction is disposed on the surface of the solar battery cell 10, and the conductive film adhesive 60 is disposed in first regions 56 that are discretely formed in the one direction in which the bus bar electrode 50 extends. May be.
　導電性フィルム状接着剤６０は、バスバー電極５０と重複しながら、バスバー電極５０が延びる一方向に形成される第２領域５８に非配置であってもよい。 The conductive film adhesive 60 may not be arranged in the second region 58 formed in one direction in which the bus bar electrode 50 extends while overlapping with the bus bar electrode 50.
　本発明の別の態様は、太陽電池モジュール１００の製造方法である。この方法は、太陽電池セル１０の表面に導電性フィルム状接着剤６０を配置するステップと、導電性フィルム状接着剤６０にセル間配線材１８を接着させることによって、太陽電池セル１０の表面にセル間配線材１８を接続するステップとを備える。配置するステップでは、太陽電池セル１０の表面においてセル間配線材１８を接続すべき接続領域５４に含まれる第１領域５６と第２領域５８のうち、第１領域５６に導電性フィルム状接着剤６０を配置するとともに、第２領域５８に導電性フィルム状接着剤６０を非配置とする。 Another aspect of the present invention is a method for manufacturing the solar cell module 100. In this method, the conductive film adhesive 60 is disposed on the surface of the solar battery cell 10, and the intercell wiring member 18 is adhered to the conductive film adhesive 60, whereby the surface of the solar battery cell 10 is adhered. Connecting the inter-cell wiring member 18. In the arranging step, the conductive film adhesive is formed in the first region 56 among the first region 56 and the second region 58 included in the connection region 54 to which the inter-cell wiring member 18 is connected on the surface of the solar battery cell 10. 60 is disposed, and the conductive film adhesive 60 is not disposed in the second region 58.
（実施例２）
　次に、実施例２を説明する。実施例２は、実施例１と同様に、複数の太陽電池セルが配置された太陽電池モジュールに関する。実施例２においても、実施例１と同様に、太陽電池セルの表面とバスバー電極を接着するための導電性フィルム状接着剤の使用量を減少させながら、接着力の低下を抑制することを目的とする。しかしながら、実施例２における導電性フィルム状接着剤の配置は、実施例１と異なる。実施例２に係る太陽電池モジュール１００は、図１、図２、図４と同様のタイプである。以下では、差異を中心に説明する。 (Example 2)
Next, Example 2 will be described. Example 2 is related to a solar cell module in which a plurality of solar cells are arranged in the same manner as Example 1. In Example 2, as in Example 1, the purpose is to suppress the decrease in adhesive force while reducing the amount of conductive film adhesive used to bond the surface of the solar battery cell and the bus bar electrode. And However, the arrangement of the conductive film adhesive in Example 2 is different from that in Example 1. The solar cell module 100 according to the second embodiment is of the same type as that shown in FIGS. Below, it demonstrates focusing on a difference.
　図７（ａ）－（ｂ）は、本発明の実施例２に係る太陽電池セル１０の構成を示す。図７（ａ）は、図６（ａ）－（ｅ）と同様に、太陽電池セル１０の受光面に配置されたバスバー電極５０の近傍が拡大されている。図７（ａ）において、バスバー電極５０は、これまでと同様に、ｙ軸方向に延びて配置される。一方、導電性フィルム状接着剤６０は、ｘ－ｙ平面上において、バスバー電極５０の内側でｙ軸方向に延びて配置される。 FIGS. 7A to 7B show the configuration of the solar battery cell 10 according to Example 2 of the present invention. In FIG. 7A, the vicinity of the bus bar electrode 50 arranged on the light receiving surface of the solar battery cell 10 is enlarged, as in FIGS. 6A to 6E. In FIG. 7A, the bus bar electrode 50 is arranged extending in the y-axis direction as before. On the other hand, the conductive film adhesive 60 is disposed so as to extend in the y-axis direction inside the bus bar electrode 50 on the xy plane.
　ここでは、このようなバスバー電極５０、導電性フィルム状接着剤６０の構成をさらに詳細に説明するために図７（ｂ）を使用する。図７（ｂ）は、太陽電池セル１０のｘ軸に沿った断面図であり、図７（ａ）のＣ－Ｃ’断面図である。バスバー電極５０は、太陽電池セル１０の受光面に配置される。バスバー電極５０は、ｚ軸の正方向側において、ｘ軸方向の中央部分が凹んだ形状を有する。また、バスバー電極５０における凹んだ部分に導電性フィルム状接着剤６０が配置される。そのため、導電性フィルム状接着剤６０は、バスバー電極５０のｚ軸の正方向側におけるｘ軸方向の中央部分に配置される。導電性フィルム状接着剤６０は、セル間配線材１８に接着するとともに、バスバー電極５０におけるｚ軸の正方向側端は、セル間配線材１８に接する。このように、セル間配線材１８は、バスバー電極５０に接続される。 Here, FIG. 7B is used to describe the configuration of the bus bar electrode 50 and the conductive film adhesive 60 in more detail. FIG. 7B is a cross-sectional view of the solar battery cell 10 along the x-axis, and is a cross-sectional view taken along the line C-C ′ of FIG. The bus bar electrode 50 is disposed on the light receiving surface of the solar battery cell 10. The bus bar electrode 50 has a shape in which a central portion in the x-axis direction is recessed on the positive side of the z-axis. Further, the conductive film adhesive 60 is disposed in the recessed portion of the bus bar electrode 50. Therefore, the conductive film adhesive 60 is disposed at the central portion in the x-axis direction on the positive side of the z-axis of the bus bar electrode 50. The conductive film adhesive 60 adheres to the inter-cell wiring member 18, and the z-axis positive side end of the bus bar electrode 50 is in contact with the inter-cell wiring member 18. As described above, the inter-cell wiring member 18 is connected to the bus bar electrode 50.
　本発明の実施例によれば、バスバー電極５０の一部分を凹ませるので、バスバー電極５０に使用する材料の量を減少できる。また、バスバー電極５０の凹んだ部分に導電性フィルム状接着剤６０を配置させるので、導電性フィルム状接着剤６０の使用量を減少できる。 According to the embodiment of the present invention, since a part of the bus bar electrode 50 is recessed, the amount of material used for the bus bar electrode 50 can be reduced. Moreover, since the conductive film adhesive 60 is arrange | positioned in the recessed part of the bus-bar electrode 50, the usage-amount of the conductive film adhesive 60 can be reduced.
　以上、本発明について実施例をもとに説明した。この実施例は例示であり、それらの各構成要素あるいは各処理プロセスの組合せにいろいろな変形例が可能なこと、またそうした変形例も本発明の範囲にあることは当業者に理解されるところである。 The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to each of those constituent elements or combinations of processing processes, and such modifications are also within the scope of the present invention. .
　１０　太陽電池セル、　１２　太陽電池群、　１４　群間配線材、　１６　群端配線材（配線材）、　１８　セル間配線材（配線材）、　２０　終端配線材、　３８　非発電領域、　４０　保護部材、　４２　封止部材、　４４　端子ボックス、　５０　バスバー電極、　５２　フィンガー電極、　５４　接続領域、　５６　第１領域、　５８　第２領域、　６０　導電性フィルム状接着剤、　１００　太陽電池モジュール。 10 solar cells, 12 solar cell groups, 14 inter-group wiring material, 16 group end wiring material (wiring material), 18 inter-cell wiring material (wiring material), 20 termination wiring material, 38 non-power generation area, 40 protective member, 42 sealing member, 44 terminal box, 50 busbar electrode, 52 finger electrode, 54 connection area, 56 1st area, 58 2nd area, 60 conductive film adhesive, 100 solar cell module.
　本発明によれば、導電性フィルム状接着剤の使用量を減少させながら、接着力の低下を抑制できる。 According to the present invention, it is possible to suppress a decrease in adhesive force while reducing the amount of conductive film adhesive used.

Claims (8)

  1. 　複数の太陽電池セルと、
    　前記複数の太陽電池セルのうち、隣接した太陽電池セルを電気的に接続する配線材と、
    　前記配線材によって接続すべき太陽電池セルの表面と、前記配線材との間に配置される導電性フィルム状接着剤とを備え、
    　前記導電性フィルム状接着剤は、前記太陽電池セルの表面において前記配線材を接続すべき接続領域に含まれる第１領域と第２領域のうち、前記第１領域に配置されるとともに、前記第２領域に非配置であることを特徴とする太陽電池モジュール。     A plurality of solar cells,
    Among the plurality of solar cells, a wiring material for electrically connecting adjacent solar cells,
    The surface of solar cells to be connected by the wiring material, and a conductive film adhesive disposed between the wiring material,
    The conductive film adhesive is disposed in the first region among the first region and the second region included in the connection region to which the wiring member is to be connected on the surface of the solar battery cell, and the first A solar cell module which is not arranged in two regions.
  2. 　前記太陽電池セルの表面には、一方向に延びる電極が配置され、
    　前記導電性フィルム状接着剤は、前記電極と重複しながら、前記電極が延びる一方向に形成される前記第２領域に非配置であり、前記第２領域の両側に並んで形成される前記第１領域に配置されることを特徴とする請求項１に記載の太陽電池モジュール。     An electrode extending in one direction is disposed on the surface of the solar battery cell,
    The conductive film adhesive is not disposed in the second region formed in one direction in which the electrode extends while overlapping with the electrode, and is formed side by side on both sides of the second region. The solar cell module according to claim 1, wherein the solar cell module is disposed in one region.
  3. 　前記導電性フィルム状接着剤は、前記第２領域の両側に並んで形成される前記第１領域に配置されるとともに、前記電極をまたいで結合することを特徴とする請求項２に記載の太陽電池モジュール。 3. The sun according to claim 2, wherein the conductive film adhesive is disposed in the first region formed side by side on both sides of the second region, and is bonded across the electrodes. Battery module.
  4. 　前記導電性フィルム状接着剤は、波形形状に形成される前記第１領域に配置されることを特徴とする請求項１に記載の太陽電池モジュール。 The solar cell module according to claim 1, wherein the conductive film adhesive is disposed in the first region formed in a corrugated shape.
  5. 　前記太陽電池セルの表面には、一方向に延びる電極が配置され、
    　前記導電性フィルム状接着剤は、前記電極を複数回またぎながら、前記電極が延びる一方向に形成される前記第１領域に配置されることを特徴とする請求項１に記載の太陽電池モジュール。     An electrode extending in one direction is disposed on the surface of the solar battery cell,
    2. The solar cell module according to claim 1, wherein the conductive film adhesive is disposed in the first region formed in one direction in which the electrode extends while straddling the electrode a plurality of times.
  6. 　前記太陽電池セルの表面には、一方向に延びる電極が配置され、
    　前記導電性フィルム状接着剤は、前記電極が延びる一方向において離散的に形成される前記第１領域に配置されることを特徴とする請求項１に記載の太陽電池モジュール。     An electrode extending in one direction is disposed on the surface of the solar battery cell,
    2. The solar cell module according to claim 1, wherein the conductive film adhesive is disposed in the first region formed discretely in one direction in which the electrode extends.
  7. 　前記導電性フィルム状接着剤は、前記電極と重複しながら、前記電極が延びる一方向に形成される前記第２領域に非配置であることを特徴とする請求項６に記載の太陽電池モジュール。 The solar cell module according to claim 6, wherein the conductive film adhesive is not arranged in the second region formed in one direction in which the electrode extends while overlapping with the electrode.
  8. 　太陽電池セルの表面に導電性フィルム状接着剤を配置するステップと、
    　前記導電性フィルム状接着剤に配線材を接着させることによって、太陽電池セルの表面に配線材を接続するステップとを備え、
    　前記配置するステップでは、前記太陽電池セルの表面において前記配線材を接続すべき接続領域に含まれる第１領域と第２領域のうち、前記第１領域に前記導電性フィルム状接着剤を配置するとともに、前記第２領域に前記導電性フィルム状接着剤を非配置とすることを特徴とする太陽電池モジュールの製造方法。     Disposing a conductive film adhesive on the surface of the solar cell;
    Connecting the wiring material to the surface of the solar cell by adhering the wiring material to the conductive film adhesive,
    In the arranging step, the conductive film adhesive is arranged in the first region among the first region and the second region included in the connection region to which the wiring material is to be connected on the surface of the solar battery cell. And the manufacturing method of the solar cell module characterized by making the said electroconductive film adhesive into non-arrangement in the 2nd field.
PCT/JP2017/007070 2016-02-29 2017-02-24 Solar battery module and method for manufacturing solar battery module WO2017150372A1 (en)

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Citations (5)

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JP2012142452A (en) * 2010-12-29 2012-07-26 Sanyo Electric Co Ltd Solar cell and solar cell module
JP2012253062A (en) * 2011-05-31 2012-12-20 Sanyo Electric Co Ltd Solar cell module and manufacturing method of the same
WO2013140623A1 (en) * 2012-03-23 2013-09-26 三洋電機株式会社 Solar cell module and method for manufacturing same
US20140130863A1 (en) * 2011-07-28 2014-05-15 Sanyo Electric Co., Ltd. Photovoltaic module
WO2014174836A1 (en) * 2013-04-25 2014-10-30 三洋電機株式会社 Solar cell module and method for manufacturing solar cell module

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012142452A (en) * 2010-12-29 2012-07-26 Sanyo Electric Co Ltd Solar cell and solar cell module
JP2012253062A (en) * 2011-05-31 2012-12-20 Sanyo Electric Co Ltd Solar cell module and manufacturing method of the same
US20140130863A1 (en) * 2011-07-28 2014-05-15 Sanyo Electric Co., Ltd. Photovoltaic module
WO2013140623A1 (en) * 2012-03-23 2013-09-26 三洋電機株式会社 Solar cell module and method for manufacturing same
WO2014174836A1 (en) * 2013-04-25 2014-10-30 三洋電機株式会社 Solar cell module and method for manufacturing solar cell module

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