JP2014170898A - Solar battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar battery module having excellent lighting property.SOLUTION: A solar cell module provided by the present invention is provided with a solar battery cell group comprising two or more solar battery cells. In this solar battery module, each of the two or more solar battery cells is belt-shaped. The two or more solar battery cells are disposed with a space from each other. Furthermore, the solar battery module is configured so that the space between two adjacent solar battery cells among the solar battery cell group have a light transmitting property.

Description

  The present invention relates to a solar cell module. In detail, it is related with the solar cell module which has translucency.

  Solar cell modules that convert the energy of sunlight into electric power are widely used as clean power generators on various scales such as solar farms and solar panels for home installation. Such a conventional solar cell module typically includes a solar cell, two glass covers protecting both sides of the solar cell, and a metal (for example, aluminum) attached to the outer peripheral edge of the glass cover. ) Made frame. Such a solar cell module is installed in a flat form on a roof, a wall surface, or the like of a building for use. A flexible solar cell module that can be installed not only on a flat surface but also on a curved surface has been proposed. Patent Document 1 is cited as a technical document disclosing this type of prior art. In Patent Document 1, a flexible resin film (typically a tetrafluoroethylene-ethylene copolymer film) is employed as a covering member of a solar battery cell instead of a glass cover. Patent Documents 2 and 3 propose techniques for constructing a frameless solar cell module by using an adhesive sealing material instead of a metal frame. Furthermore, in patent document 4, the strip | belt-shaped solar cell by which the semiconductor film was formed in the elongate sheet | seat is proposed as a solar cell used for the above solar cell modules.

Japanese Patent Laid-Open No. 10-284745 JP 2010-171400 A JP 2010-278358 A JP 2011-176148 A

  Conventionally, a plurality of light-transmitting solar cell modules have been proposed (for example, Patent Document 1). However, for example, the light-transmitting region and the light-transmitting property can be governed by the shape of the solar cell, the material of the constituent member, and the like. The total amount of light, the illuminance distribution of the adopted light, and the visual effect provided by the adopted light). If a solar cell module having good daylighting properties is provided, the application range of the solar cell module is further expanded and beneficial.

  The present invention relates to an improvement of a solar cell module, and an object thereof is to provide a solar cell module having good daylighting properties.

  In order to achieve the above object, according to the present invention, a solar cell module including a solar cell group composed of two or more solar cells is provided. In this solar cell module, each of the two or more solar cells has a strip shape. In addition, the two or more solar cells are arranged at intervals. Furthermore, it is comprised so that between two adjacent photovoltaic cells among the said photovoltaic cell group may have translucency.

  According to such a configuration, by arranging a plurality of strip-shaped solar cells (hereinafter also simply referred to as cells) at intervals, translucency is imparted between the cells, and good daylighting properties can be obtained. In addition, the arrangement of the cells can give an unprecedented design. For example, when strip-like cells are arranged at a predetermined interval (for example, at equal intervals), a stripe-like pattern is formed, and excellent design can be imparted in combination with light taken in between the cells. Thus, according to this invention, the solar cell module which has favorable lighting property is provided. Since such a solar cell module can have a wider application range than conventional ones, it is expected that the use of clean energy will expand.

  In a preferred embodiment disclosed herein, the solar cell module can be installed in a form including a curved surface. Such a solar cell module can be designed (manufactured) as, for example, a solar cell module having a shape including a predetermined curved surface (typically a shape suitable for an installation location). Therefore, the application range of the solar cell module can be further expanded.

  In a preferred embodiment disclosed herein, the solar cell module is constructed as a flexible solar cell module in which at least one of the longitudinal direction of the solar cells and the direction orthogonal to the longitudinal direction has flexibility. With such a configuration, at least one direction (preferably the above two directions) of the longitudinal direction of the cells provided in the solar cell module and the direction orthogonal to the longitudinal direction (for example, the cell arrangement direction) draws a curved surface. It can be configured to be deformable. Therefore, according to said structure, the flexible solar cell module which has the outstanding flexibility is provided. Since this flexible solar cell module can have a greater degree of flexibility in the shape it can take than a conventional flexible solar cell module, the application range of the solar cell module can be further expanded. In the present specification, the “flexible solar cell module” means a solar cell module having flexibility (including flexibility, flexibility, and shape adaptability) that can take a form including a curved surface. And those having re-deformable flexibility.

  In a preferred aspect disclosed herein, the solar cell module includes a connector that electrically connects the solar cell groups. The connector is a long interconnector arranged so as to span the solar battery cell group. Furthermore, the longitudinal direction of the interconnector is flexible. By constructing the connector (interconnector) for electrically connecting the cell groups as described above, the longitudinal direction of the interconnector becomes flexible, and the direction orthogonal to the longitudinal direction of the solar cell has flexibility. A solar cell module can be suitably realized.

  In a preferred aspect disclosed herein, the solar cell module includes a connector that electrically connects the solar cell groups. The connector is disposed at an end of the solar battery cell. By comprising in this way, a connector does not impair the external appearance and lighting property of a solar cell module.

  In a preferred embodiment disclosed herein, the solar cell module includes a coating film that covers the solar cell group. Moreover, the said covering film has translucency and flexibility. By using such a covering film, a flexible solar cell module having good daylighting properties can be suitably realized.

  In a preferred embodiment disclosed herein, the solar cell module is configured as a frameless solar cell module. By making it frameless, a solar cell module having excellent flexibility can be suitably realized. The frameless solar cell module is also advantageous in terms of light weight. Furthermore, the solar cell module disclosed herein preferably includes an adhesive (pressure-sensitive adhesive) sealing material that seals an end portion of the solar cell module. For example, a frameless solar cell module can be constructed by using an adhesive sealing material instead of a highly rigid (typically hard) frame made of metal or the like. Moreover, it is preferable that the said adhesive sealing material has a butyl-type adhesive. In the present specification, “frameless” means that a highly rigid (typically hard) frame made of metal or the like is not used.

  In a preferred embodiment disclosed herein, the solar cell module includes a surface coating film that covers a surface of the solar cell group, and a back surface coating film that covers a back surface of the solar cell group, and the surface coating film. And the back coating film have translucency and flexibility. Moreover, the said adhesive sealing material is arrange | positioned at the peripheral edge part of the said surface coating film and the said back surface coating film. By comprising in this way, the solar cell module which has the outstanding flexibility and favorable lighting property can be implement | achieved suitably. In the present specification, the “surface of the solar cell group” refers to a sunlight incident surface, and the “back surface of the solar cell group” refers to a surface opposite to the surface. The front and back surfaces of the solar battery cell and the front and back surfaces of the solar battery module can be defined in the same manner.

It is a top view which shows typically the solar cell module which concerns on 1st Embodiment. It is a schematic cross section in the II-II line of FIG. It is sectional drawing which shows the interconnector which concerns on 1st Embodiment typically. (A) is a top view which shows typically the 1st laminated film which comprises the interconnector which concerns on 1st Embodiment, (b) is a 2nd laminated film which comprises the interconnector which concerns on 1st Embodiment typically. FIG. It is a perspective view which shows typically an example of the installation state of the solar cell module which concerns on 1st Embodiment. It is a perspective view which shows typically another example of the installation state of the solar cell module which concerns on 1st Embodiment. It is a top view which shows typically the laminated | multilayer film which comprise the interconnector which concerns on 2nd Embodiment. It is sectional drawing which shows typically the interconnector which concerns on 2nd Embodiment. It is a schematic cross section which expands and shows the edge part vicinity of the solar cell module which concerns on 3rd Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described. Note that matters other than matters specifically mentioned in the present specification and necessary for the implementation of the present invention can be grasped as design matters of those skilled in the art based on the prior art in this field. The present invention can be carried out based on the contents disclosed in this specification and common technical knowledge in the field. Further, in the following drawings, members / parts having the same action are described with the same reference numerals, and overlapping descriptions may be omitted or simplified.

  FIG. 1 is a top view schematically showing the solar cell module according to the first embodiment, and FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG. The solar cell module of this embodiment will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the solar cell module 1 according to the first embodiment includes a solar cell group 10 including a plurality of solar cells including solar cells 10a, 10b, and 10c. The solar cell module 1 also includes a surface coating film 20 that covers the surface of the solar cell group 10, a back surface coating film 21 that covers the back surface of the solar cell group 10, and peripheral edges of the surface coating film 20 and the back surface coating film 21. And an adhesive sealing material 30 disposed in the section.

  Each of the solar cells 10a, 10b, 10c has a strip shape, and its longitudinal direction has flexibility. Moreover, the photovoltaic cells 10a, 10b, and 10c are arranged at intervals. Specifically, the solar cells 10a, 10b, and 10c are arranged at equal intervals in the width direction (direction orthogonal to the longitudinal direction). In this embodiment, a strip-shaped chalcopyrite solar cell having a width of about 20 mm and a thickness of about 100 μm is used as the solar cell 10a. The same applies to the solar cells 10b and 10c.

  Both the surface coating film 20 and the back surface coating film 21 have a rectangular shape when viewed from the upper surface, and have the same shape and size. Moreover, all have translucency and flexibility. The surface coating film 20 and the back surface coating film 21 are arranged so as to sandwich the solar battery cell group 10 and cover the front surface and the back surface of the solar battery cell group 10, respectively. Moreover, the surface coating film 20 and the back surface coating film 21 have overlapped so that both end surfaces may become flush. In this embodiment, a transparent film made of tetrafluoroethylene-ethylene copolymer (ETFE) and having a thickness of about 25 μm is used as the surface coating film 20 and the back surface coating film 21.

  An adhesive sealing material 30 is disposed at the peripheral ends of the surface coating film 20 and the back coating film 21. Specifically, the adhesive sealing material 30 is disposed between the surface coating film 20 and the back surface coating film 21 and over the entire circumference of the surface coating film 20 and the back surface coating film 21, It joins with both the film 20 and the back surface covering film 21. Thereby, the opening between the surface coating film 20 and the back surface coating film 21 is sealed by the adhesive sealing material 30, and the inside of the solar cell module 1 in which the solar cell group 10 is disposed is sealed. What is necessary is just to perform the said joining by crimping the adhesive sealing material 30. FIG. The adhesive sealing material 30 may be used for joining after being heated and melted as necessary. In this embodiment, a butyl adhesive is used as the adhesive sealing material. The solar cell module 1 in which the solar cell group 10 is arranged may be filled with a sealing resin such as an ethylene-vinyl acetate copolymer (EVA).

  Both ends of the solar cell group 10 (specifically, the strip-like solar cells 10a, 10b, 10c constituting the solar cell group 10) are electrically connected by interconnectors 40A, 40B. The interconnectors 40A, 40B are both long and are arranged so as to span the solar cells 10a, 10b, 10c in the vicinity of the end of the solar cell module 1. Specifically, the interconnectors 40A and 40B are arranged so that the longitudinal direction thereof is substantially orthogonal to the longitudinal direction of the solar cells 10a, 10b, and 10c. Further, the outer surfaces of the interconnectors 40A and 40B are covered with the adhesive sealing material 30, and the interconnectors 40A and 40B are not visible from the outside of the solar cell module 1. In addition, since the interconnectors 40A and 40B have a simple sheet-like configuration, even if they are visually recognized from the outside, the design of the solar cell module 1 is not hindered.

  FIG. 3 is a cross-sectional view schematically showing the interconnector according to the first embodiment, and FIG. 4A is a top view schematically showing the first laminated film constituting the interconnector according to the first embodiment. It is a figure and (b) is a top view which shows typically the 2nd laminated | multilayer film which comprise the interconnector which concerns on 1st Embodiment. Hereinafter, the interconnector according to the first embodiment will be described in detail with reference to FIGS.

  As shown in FIGS. 3 and 4, the interconnector 40 </ b> A is composed of two long laminated films 45 </ b> A and 45 </ b> B. The laminated films 45A and 45B are arranged so as to sandwich a plurality of solar cells 10a, 10b, and 10c (solar cell group 10) arranged in a row at a predetermined interval. In addition, the arrangement direction of the photovoltaic cells 10a, 10b, and 10c coincides with the longitudinal direction of the laminated films 45A and 45B.

  A laminated film (hereinafter also referred to as a first laminated film) 45A disposed above in FIG. 3 includes a long first insulating layer 50A, as shown in FIG. 3 and FIG. The first metal layers 51Aa, 51Ab, 51Ac supported on one surface (the lower surface in FIG. 3) of the first insulating layer 50A and the first metal layers 51Aa, 51Ab, 51Ac are disposed on (surfaces). First conductive adhesive layers 52Aa, 52Ab, and 52Ac are provided. The first metal layers 51Aa, 51Ab, 51Ac and the first conductive adhesive layers 52Aa, 52Ab, 52Ac each constitute a conductive portion. In this embodiment, a long polyimide film having a thickness of about 25 μm is used as the first insulating layer 50A. The same applies to the second insulating layer 50B described later.

  Each of the first metal layers 51Aa, 51Ab, and 51Ac has a rectangular shape when viewed from above, and each of the first metal layers 51Aa, 51Ab, and 51Ac is independently supported on the surface of the first insulating layer 50A. Specifically, each of the first metal layers 51Aa, 51Ab, and 51Ac is first (in other words, in an island shape) with a predetermined interval in the direction along the longitudinal direction of the laminated film 45A. It is arranged on the surface of the insulating layer 50A. Accordingly, each of the first metal layers 51Aa, 51Ab, and 51Ac is not electrically connected to the adjacent first metal layer by itself. For example, in FIG. 4A, the first metal layer 51Ab is not electrically connected to the first metal layers 51Aa and 51Ac arranged next thereto. By arranging the first metal layers 51Aa, 51Ab, 51Ac as described above, the first metal layer pattern 51A is formed on the surface of the first insulating layer 50A.

  A laminated film (hereinafter also referred to as a second laminated film) 45B disposed below in FIG. 3 is a long film as shown in FIG. 3 and FIG. 4B, similarly to the first laminated film 45A. Each of the second metal layer 51Ba, 51Bb, 51Bc and the second metal layer 51Ba, 51Bb, 51Bc supported on one surface (the upper surface in FIG. 3) of the second insulating layer 50B. 2nd electroconductive adhesion layer 52Ba, 52Bb, 52Bc arrange | positioned above (surface). The second metal layers 51Ba, 51Bb, 51Bc and the second conductive adhesive layers 52Ba, 52Bb, 52Bc each constitute a conductive portion.

  The second metal layers 51Ba, 51Bb, 51Bc are arranged on the surface of the second insulating layer 50B in the same manner as the first metal layers 51Aa, 51Ab, 51Ac on the surface of the first insulating layer 50A. A second metal layer pattern 51B is formed on the surface of the second insulating layer 50B. In this embodiment, each of the first metal layers 51Aa, 51Ab, 51Ac and the second metal layers 51Ba, 51Bb, 51Bc is a Cu layer having a width of about 10 mm and a thickness of about 36 μm formed by plating. They have basically the same shape and size (surface area and thickness). The spacing between the metal layers is basically the same. Therefore, the first metal layer pattern 51A and the second metal layer pattern 51B basically have the same pattern.

  The first laminated film 45A and the second laminated film 45B are opposed to each other on the metal layer pattern 51A, 51B formation surface. Specifically, the first metal layer pattern 51A and the second metal layer pattern 51B face each other in a shifted state in the direction along the longitudinal direction of the first laminated film 45A and the second laminated film 45B. Thereby, for example, the first metal layer 51Aa partially faces the surface of the solar battery cell 10a (part on the left side in FIG. 3). In another part (a part on the right side in FIG. 3), the second metal layer 51Bb is opposed between the solar cells 10a and 10b. A part of the second metal layer 51Bb (a part on the left side in FIG. 3) faces the first metal layer 51Aa between the solar cells 10a and 10b. Further, the other part (a part on the right side in FIG. 3) faces the back surface of the solar battery cell 10b.

  A first conductive adhesive layer 52Aa having adhesiveness on both surfaces is disposed in a region where the surface of the solar battery cell 10a and the first metal layer 51Aa are opposed to each other. The first conductive adhesive layer 52Aa is disposed so as to cover almost the entire surface of the first metal layer 51Aa as shown in FIG. The first metal layer 51Aa is bonded to the surface electrode 11a of the solar battery cell 10a by the first conductive adhesive layer 52Aa. In this way, the first metal layer 51Aa, the first conductive adhesive layer 52Aa, and the surface electrode 11a of the solar battery cell 10a are electrically connected. In this embodiment, as the first conductive adhesive layers 52Aa, 52Ab, and 52Ac, a conductive pressure-sensitive adhesive sheet having a thickness of about 30 μm that is made of an acrylic polymer containing a silver filler is used. The same applies to second conductive adhesive layers 52Ba, 52Bb, and 52Bc described later. Note that the first conductive adhesive layer 52Aa is not in contact with solar cells other than the solar cell 10a. Further, although not particularly illustrated, in order to avoid contact between the first conductive adhesive layer 52Aa and the second conductive adhesive layer 52Ba, between the first conductive adhesive layer 52Aa and the second conductive adhesive layer 52Ba (for example, It is preferable to dispose an insulating layer such as a polyimide film on a part of the surface of the first conductive adhesive layer 52Aa or the second conductive adhesive layer 52Ba.

  A second conductive adhesive layer 52Bb having the same configuration as that of the first conductive adhesive layer 52Aa is disposed in a facing region between the back surface of the solar battery cell 10b and the second metal layer 51Bb. Similar to the first conductive adhesive layer 52Aa in the first metal layer 51Aa, the second conductive adhesive layer 52Bb also covers almost the entire surface of the second metal layer 51Bb as shown in FIG. Has been placed. By the second conductive adhesive layer 52Bb, the second metal layer 51Bb is bonded to the back electrode 12b of the solar battery cell 10b. In this way, the second metal layer 51Bb, the second conductive adhesive layer 52Bb, and the back electrode 12b of the solar battery cell 10b are electrically connected. Note that the second conductive adhesive layer 52Bb is not in contact with solar cells other than the solar cell 10b.

  A first conductive adhesive layer 52Aa and a second conductive adhesive layer 52Bb are disposed on the respective surfaces of the opposing region between the first metal layer 51Aa and the second metal layer 51Bb. Thereby, 1st electroconductive adhesive layer 52Ab and 2nd electroconductive adhesive layer 52Bb adhere | attach between photovoltaic cell 10a, 10b. In this way, the first metal layer 51Aa, the second metal layer 51Bb, the first conductive adhesive layer 52Aa, and the second conductive adhesive layer 52Bb constitute a conductive path between the solar cells 10a and 10b. As a result, electrical connection between the front surface of the solar battery cell 10a and the back surface of the solar battery cell 10b is realized.

  The configurations of the first metal layers 51Ab and 51Ac, the second metal layers 51Ba and 51Bc, the first conductive adhesive layers 52Ab and 52Ac, and the second conductive adhesive layers 52Ba and 52Bc are respectively the first metal layer 51Aa and the second metal layer 51Aa. It is basically the same as the metal layer 51Bb, the first conductive adhesive layer 52Aa, and the second conductive adhesive layer 52Bb, and the first metal layer 51Aa and the second conductive layer 52Bb are opposed to the first insulating layer 50A and the second insulating layer 50B. A structural unit similar to the structural unit composed of the two metal layers 51Bb, the first conductive adhesive layer 52Aa, and the second conductive adhesive layer 52Bb is repeated. Therefore, description of the repeated structural units is omitted here.

  The interconnector 40A can easily and collectively connect the electrical connection (wiring) of the solar cell group 10 only by sandwiching and fixing the solar cell group 10 between the first laminated film 45A and the second laminated film 45B. Can be done. Then, the electric energy generated in the solar cell group 10 through the interconnector 40A is taken out from a terminal board (not shown) and supplied to the outside of the solar cell module 1. Further, the interconnector 40A is flexible in the longitudinal direction while being fixed to the solar battery cell group 10. Furthermore, the above configuration eliminates the need for the conventional metal wiring that has crossed between the side surfaces of the adjacent solar cells 10a and 10b, so that the cell end portion is not cracked due to the metal wiring. . Since interconnector 40B has basically the same configuration as interconnector 40A, description thereof will not be repeated.

  FIG. 5 is a perspective view schematically showing an example of the installation state of the solar cell module according to the first embodiment, and FIG. 6 is a schematic view of another example of the installation state of the solar cell module according to the first embodiment. FIG.

  Since the above-described solar cell module 1 is constructed in a frameless manner using strip-shaped solar cells 10a, 10b, 10c whose longitudinal direction is flexible, in the longitudinal direction of the solar cells 10a, 10b, 10c. The direction along is flexible. Therefore, for example, as shown in FIG. 5, the solar cell module 1 is installed in such a manner that the longitudinal direction of the solar cells 10 a, 10 b, 10 c draws a curved surface (in the case of a cross section along the longitudinal direction). Can do. Since the solar cell module 1 is also constructed using the elongated interconnectors 40A and 40B whose longitudinal direction is flexible, the direction along the longitudinal direction of the interconnectors 40A and 40B (solar cell 10a, The direction orthogonal to the longitudinal direction of 10b and 10c) is also flexible. Therefore, for example, as shown in FIG. 6, in the solar cell module 1, the direction orthogonal to the longitudinal direction of the solar cells 10 a, 10 b, 10 c has a curved surface (in the case of a cross section perpendicular to the longitudinal direction, a curve). It can also be installed in the form of drawing.

  Further, since the solar battery cells 10a, 10b, and 10c are covered with the light-transmitting coating films 20 and 21 in a state of being spaced apart from each other, the light incident on the solar battery module 1 is the solar battery. It passes between the cells 10a, 10b, 10c. Thereby, a good daylighting property can be obtained on the back side of the solar cell module 1. Furthermore, the solar cell group 10 can impart excellent design properties in combination with the light taken in between the solar cells due to its arrangement. Further, the solar cell module can be constructed without using a metal fixing member such as a rivet, which is advantageous in terms of manufacturing. Note that the general construction of the solar cell module 1 can be performed based on common general technical knowledge in the technical field, and does not characterize the present invention, so that the description thereof is omitted.

  FIG. 7 is a top view schematically showing a laminated film constituting the interconnector according to the second embodiment, and FIG. 8 is a cross-sectional view schematically showing the interconnector according to the second embodiment.

  The solar cell module 1 according to the second embodiment has basically the same configuration as the solar cell module according to the first embodiment except for the interconnectors 40A and 40B. Therefore, this embodiment will be described mainly with respect to the interconnectors 40A and 40B, and description of other points will be omitted.

  As shown in FIG. 7, the interconnector 40 </ b> A according to the second embodiment includes a single laminated film 45 unlike the first embodiment. The laminated film 45 includes a long insulating layer 50 made of one insulating film, and metal layers 51a, 51b, 51c supported on one surface of the insulating layer 50. The laminated film 45 is also configured to be foldable along a fold line L parallel to the arrangement direction of the solar cells 10a, 10b, and 10c shown in FIG. In this embodiment, the fold line L is a line parallel to the longitudinal direction of the laminated film 45 and is also a line (width direction center line) that runs through the center of the laminated film 45 in the width direction.

  The metal layer 51a includes a first region 55a and a second region 56a that are separated by a folding line L. The first area 55a corresponds to one part (upper part in FIG. 7) having the fold line L as a delimiter, and the second area 56a is the other part (lower part in FIG. 7) having the fold line L as a delimiter. Corresponding to The first region 55a of the metal layer 51a is in one direction parallel to the fold line L and protrudes toward the solar battery cell 10a (left side in FIG. 7). Hereinafter, this protruding portion is referred to as a first protruding portion 57a. In addition, the second region 56a of the metal layer 51a is in the direction opposite to the one direction (the direction along the fold line L and opposite to the one direction, rightward in FIG. 7), and the solar cell. It protrudes to the 10b side. Hereinafter, this protruding portion is referred to as a second protruding portion 59a.

  The metal layers 51b and 51c are configured in the same manner as the metal layer 51a, and are independently supported on the surface of the insulating layer 50. Specifically, each of the metal layers 51a, 51b, 51c is arranged on the surface of the insulating layer 50 in a state of being separated at a predetermined interval (in other words, in an island shape). Therefore, each of the metal layers 51a, 51b, 51c is not electrically connected to an adjacent metal layer by itself. A metal layer pattern 51 is formed on the surface of the insulating layer 50 by arranging the metal layers 51a, 51b, 51c as described above.

  A first conductive adhesive layer 65a is disposed on the surface of the first protrusion 57a of the metal layer 51a. A second conductive adhesive layer 66a is disposed on the surface of the second protrusion 59a of the metal layer 51a. In this embodiment, the first conductive adhesive layer is formed on the non-projecting portion of the first region 55a (the portion other than the first projecting portion 57a in the first region 55a. The right portion of the first region 55a in FIG. 7) 58a. 65a is not disposed, and the second conductive adhesive layer 66a is not disposed on the surface of the non-projecting portion (the portion other than the second projecting portion 59a in the second region 56a) 60a of the second region 56a. .

  The laminated film 45 configured as described above is folded back with the fold line L as a starting point so that the surface on which the metal layer 51a is disposed is on the inner side and sandwiches one end of the solar cells 10a, 10b, 10c. . Press as necessary. Then, as shown in FIG. 8, the interconnector 40A is fixed to one end of the solar cells 10a, 10b, 10c, and the solar cell group 10 is electrically connected by the interconnector 40A.

  In the interconnector 40A after being folded, the first conductive adhesive layer 65a disposed on the first protrusion 57a of the metal layer 51a is bonded to the surface electrode 11a of the solar battery cell 10a. Further, the second conductive adhesive layer 66a disposed on the second projecting portion 59a of the metal layer 51a is bonded to the back electrode 12b of the solar battery cell 10b. In this way, the first conductive adhesive layer 65a, the metal layer 51a, and the second conductive adhesive layer 66a constitute a conductive path between the solar cells 10a and 10b, and the surface of the solar cell 10a and the solar cell 10b. Electrical connection with the back side is realized. The interconnector 40A of this embodiment has a smaller number of parts than the first embodiment and can be more excellent in wiring workability.

  The configurations of the metal layers 51b and 51c, the first conductive adhesive layers 65b and 65c, and the second conductive adhesive layers 66b and 66c are the same as the metal layer 51a, the first conductive adhesive layer 65a, and the second conductive adhesive layer 66a, respectively. Since they are basically the same, redundant description is omitted here. Since interconnector 40B has basically the same configuration as interconnector 40A, description thereof will not be repeated. In this embodiment, the first region and the second region of the metal layer are connected, but may be separated. For example, the first region and the second region of the metal layer may be separated by a predetermined interval with the fold line in between. In that case, at least one surface of the first region and the second region (typically, a region opposite to the first region and the second region when folded at the folding line L) is adjacent to two It is preferable that a conductive adhesive layer is disposed between the solar cells, whereby the first region and the second region are electrically connected.

  Further, in this embodiment, as shown in FIG. 7, the second conductive adhesive layer 66a on the metal layer 51a and the first conductive adhesive layer 65b on the metal layer 51b are separated before the construction of the interconnector 40A. However, the two may be integrally formed and disposed on the laminated film 45. In that case, the second conductive adhesive layer 66a and the first conductive adhesive layer 65b may be configured to be separated when the laminated film 45 is folded. As such a method, for example, a method in which a conductive adhesive layer composed of a second conductive adhesive layer 66a and a first conductive adhesive layer 65b is cut at a folding line L before and after being placed on a laminated film. Is mentioned.

  FIG. 9 is an enlarged schematic cross-sectional view showing the vicinity of the end of the solar cell module according to the third embodiment.

  The solar cell module 1 according to the third embodiment has basically the same configuration as the solar cell module 1 according to the first embodiment except for the adhesive sealing material 30. Therefore, about this embodiment, it demonstrates centering on the adhesive sealing material 30, and abbreviate | omits description about another point.

  As shown in FIG. 9, the adhesive sealing material 30 according to the third embodiment is the same as the first embodiment in that it is disposed at the peripheral ends of the surface coating film 20 and the back surface coating film 21. However, the adhesive sealing material 30 is not applied between the surface coating film 20 and the back surface coating film 21 but on the end surface of the laminate formed by superimposing the surface coating film 20 and the back surface coating film 21 over the entire circumference. This is different from the first embodiment. Moreover, the point from which the adhesive sealing material 30 is an elongate single-sided adhesive sheet provided with the support base material 31 and the adhesive layer 32 formed in the surface of the support base material 31 also differs from the said 1st Embodiment. Specifically, the adhesive sealing material 30 is affixed so that the surface (adhesive surface) of the adhesive layer 32 covers the end surface of the surface coating film 20 and the end surface of the back surface coating film 21. The opening between the film 20 and the back surface coating film 21 is sealed.

  The width | variety of the adhesive sealing material 30 is larger than the thickness of a laminated body provided with the surface coating film 20 and the back surface coating film 21. FIG. Therefore, both ends in the width direction of the adhesive sealing material 30 protrude from the end surface of the laminate, and the protruding portion is bent to form a part of the outer surface (outer edge) of the surface coating film 20 and the back surface coating film 21. It is affixed to a part of the outer surface (outer edge). In other words, the adhesive sealing material 30 is affixed in a U-shaped cross section so as to follow the outer surface of the end portion of the laminate including the surface coating film 20 and the back surface coating film 21. In this embodiment, a 400 μm-thick butyl pressure-sensitive adhesive layer is formed on the surface of a nonwoven fabric substrate (thickness: 100 μm) with an aluminum foil (thickness: 7 μm) bonded to the back surface as the adhesive sealing material 30. A single-sided pressure-sensitive adhesive sheet is used. Also by using the adhesive sealing material 30 having such a configuration, the inside of the solar cell module 1 can be sealed framelessly as in the first embodiment.

Next, the material which comprises the solar cell module disclosed here is demonstrated in detail. The solar battery cell disclosed here may be a strip shape, and is not limited to those of the above embodiments. From the viewpoint of imparting excellent flexibility to the solar cell module, the solar cell preferably has flexibility in its longitudinal direction. For example, a compound semiconductor (preferably about 1.5 to 2.5 μm thick) on a strip electrode substrate made of a long metal (for example, stainless steel) foil having a width of 10 to 80 mm and a thickness of about 10 to 200 μm. A band-shaped solar battery cell formed with a (calcopalite) layer may be preferably used. The metal foil is preliminarily formed with a film-like back electrode made of Mo or the like, and after the compound semiconductor layer is formed, a transparent electrode (surface electrode) film made of a metal oxide such as ZnO is laminated thereon. The The compound semiconductor layer is made of, for example, a material such as Cu (In, Ga) Se ₂ , Cu (In, Ga) (Se, S) ₂ , CuInS ₂ , Cu ₂ ZnSnS ₄ , and can be formed by an evaporation method. Such a solar battery cell can be produced, for example, by the method described in Patent Document 4.

  Alternatively, a solar battery cell in which an amorphous silicon layer is formed on a synthetic resin substrate (for example, polyimide) having an electrode layer formed on the surface and a transparent electrode layer is further formed thereon may be used as the solar battery cell. Good. The method for forming the amorphous silicon layer is not particularly limited, and for example, a method using a silicon melt or a method using a CVD method (Chemical Vapor Deposition) using microcrystalline silicon or silane gas can be employed. Alternatively, organic solar cells can also be used preferably. Although the thickness of a photovoltaic cell is not specifically limited, From a flexible viewpoint, it is preferable that it is 300 micrometers or less (for example, 200 micrometers or less, typically 100 micrometers or less), for example.

  The solar cell module disclosed herein preferably includes a coating film (including a surface coating film and a back coating film). The said coating film should just have translucency, and it will not specifically limit in that limit. The solar cell module has good daylighting properties due to the above-described translucency. The covering film is more preferably flexible. Due to the above flexibility, the solar cell module can have suitable flexibility. For example, a coating film having a total light transmittance in the wavelength range of 400 to 800 nm of 70% or more (for example, 80% or more, typically 90% or more) can be preferably used. The total light transmittance may be measured based on JIS K7375 (2008).

  Specific examples of the covering film include, in addition to the ETFE film used in each of the above embodiments, a fluororesin film such as a tetrafluoroethylene-hexafluoropropylene copolymer, a vinylidene fluoride resin, and a chlorotrifluoroethylene resin. It is done. Moreover, the film comprised from materials, such as an acrylic resin and polyester, may be sufficient as a coating film. Although the thickness of the said coating film is not specifically limited, It is preferable to set it as about 3-200 micrometers (for example, 5-100 micrometers, typically 10-50 micrometers) from a flexible viewpoint. The surface coating film and the back coating film may be the same or different in material and thickness.

  Moreover, it is preferable that the solar cell module disclosed here is provided with an adhesive sealing material for the purpose of sealing its end. Since such an adhesive sealing material can be used in place of, for example, a metal frame, it can be preferably applied to a frameless solar cell module. A suitable example of such an adhesive sealing material is a butyl adhesive formed from a butyl adhesive composition.

  The butyl pressure-sensitive adhesive may contain polyisobutylene and / or butyl rubber as an essential component (typically a main pressure-sensitive adhesive component). Polyisobutylene is a polymer of isobutylene (isobutene), and its viscosity average molecular weight can be about 200,000 to 4,000,000 (preferably 500,000 to 1,500,000). Butyl rubber is a copolymer of isobutylene and a small amount of isoprene (isobutylene / isoprene rubber), and its viscosity average molecular weight can be about 300,000 to 700,000 (preferably 300,000 to 500,000). The kind of the butyl rubber is not particularly limited, and examples thereof include recycled butyl rubber and synthetic butyl rubber. Polyisobutylene is preferred from the viewpoint of improving water resistance.

  Butyl adhesives include fillers (for example, calcium carbonate), flame retardants (for example, metal hydroxides such as aluminum hydroxide), tackifier resins, softeners (for example, polybutene, process oil), pigments (for example, carbon black) ), Vulcanizing agents, vulcanization accelerators, anti-aging agents, plasticizers, lubricants, and the like, which may be added to the butyl-based pressure-sensitive adhesive composition in an appropriate ratio. The butyl pressure-sensitive adhesive may be produced by appropriately adopting a conventionally known method. For example, a butyl pressure-sensitive adhesive composition may be applied to the surface of the separator and dried to form a butyl pressure-sensitive adhesive (typically a butyl pressure-sensitive adhesive layer). The obtained adhesive sealing material composed of a butyl adhesive (typically a butyl adhesive layer) is used in such a manner that it is placed on the peripheral edge of the coating film and then attached to the coating film by pressure bonding or the like. obtain.

  The thickness of the above-mentioned adhesive sealing material (typically, the adhesive layer) is not particularly limited, but is preferably about 0.1 to 2 mm (preferably 0.5 to 1 mm). When an adhesive sealing material is arrange | positioned between coating films, the thickness of an adhesive sealing material becomes comparable as the space | interval of the said coating film. In addition, the said space | interval is larger than the thickness of a photovoltaic cell or a connector. The width of the adhesive sealing material is not particularly limited, but it should be about 0.5 mm or more (for example, 0.5 to 5 mm, typically 1 to 2 mm) in consideration of adhesion to the coating film, waterproofness, and the like. Is preferred. In addition, when an adhesive sealing material is arrange | positioned between coating films, the width | variety of the said adhesive sealing material points out the width | variety after crimping | bonding to a coating film. What is necessary is just to employ | adopt the average value of the measured value in arbitrary several places of the adhesive sealing material after pressure bonding as the said width | variety.

  Moreover, the adhesive sealing material may be provided with a support base material and an adhesive layer provided on one side of the support base material as in the third embodiment. As an adhesive layer, the adhesive layer which consists of the above-mentioned butyl-type adhesive can be employ | adopted preferably. The thickness of the pressure-sensitive adhesive layer is preferably in the range of about 10 to 1000 μm (preferably 200 to 800 μm).

  The material which comprises the said support base material is not specifically limited, For example, a nonwoven fabric etc. may be used. A suitable example is a split fiber nonwoven fabric. Here, the split fiber nonwoven fabric is, for example, a laminated nonwoven fabric obtained by laminating net (mesh) sheets so that the stretching directions are orthogonal to each other, or a combination in which the stretching directions of a plurality of yarns stretched in one direction are orthogonal to each other. It refers to the nonwoven fabric that has been made. Preferable examples of the material for forming the split fiber nonwoven fabric include polyolefin resins (typically polyethylene and polypropylene). The thickness of the supporting substrate is not particularly limited, but may be about 50 to 400 μm (preferably 70 to 200 μm).

  In addition, an additional layer such as a barrier layer may be provided on the back surface (also referred to as a surface opposite to the pressure-sensitive adhesive layer forming surface or the back surface) of the support base, if necessary. An adhesive sealing material provided with a barrier layer can be excellent in water vapor barrier properties. As the barrier layer, a metal foil such as aluminum, gold, silver, copper, nickel, cobalt, chromium, tin, or a metal oxide foil made of an oxide of these metals is used. The thickness of the barrier layer is preferably about 1 to 100 μm (preferably 5 to 50 μm). The method of forming the barrier layer is not particularly limited, for example, a method of adhering the barrier layer to the supporting substrate using an adhesive, a method of forming a barrier layer made of a metal material on the back surface of the supporting substrate by vapor deposition, etc. Is mentioned.

  The total thickness of the adhesive sealing material (adhesive sealing material comprising a supporting base material and an adhesive layer) is not particularly limited, but is approximately 60 to 1500 μm (preferably 200 to 1000 μm) from the viewpoint of flexibility of the solar cell module. ) Is preferable.

  In the solar cell module disclosed here, it is preferable that an interconnector is used as the wiring of the solar cell. Examples of the insulating layer (including the first insulating layer and the second insulating layer) that can constitute the interconnector include synthetic resin films such as polyethylene terephthalate (PET) and polyimide. The synthetic resin film may preferably be flexible. The thickness of the insulating layer is not particularly limited, and an insulating layer having a thickness of about 5 μm to 1 mm (for example, 10 to 300 μm, typically 15 to 100 μm) is preferably used from the viewpoints of flexibility, handleability, and the like. Can do.

  In the interconnector in the technology disclosed herein, a metal layer (including a first metal layer and a second metal layer) can be used as a member constituting the conductive portion. It is preferable that the metal which comprises a metal layer is a metal material which is excellent in electroconductivity. For example, metals, such as copper, aluminum, iron, nickel, silver, gold | metal | money, lead, and these alloys, are mentioned. Preferred examples include copper and tin. The metal layer may be formed by appropriately employing a conventionally known method such as plating, CVD, or PVD (Physical Vapor Deposition). Moreover, you may affix a metal foil to an insulating layer with a conventionally well-known adhesive agent or adhesive. The metal layer can be supported on the insulating layer by the above method. The surface of the metal layer may be subjected to a surface treatment for the purpose of rust prevention or the like.

  The width of the metal layer (typically, the length in the direction perpendicular to the longitudinal direction of the long laminated film) is not particularly limited, but is 1 mm or more (for example, 1.5 mm or more) from the viewpoint of ensuring good conductivity. , Typically 2 mm or more). Although the upper limit of the said width is not specifically limited, For example, it may be about 30 mm or less (for example, 20 mm or less). Note that the widths of the insulating layer and the conductive adhesive layer are not particularly limited, and can be designed according to the width of the metal layer.

  The thickness of the metal layer is not particularly limited. The thickness is preferably about 5 μm or more (for example, 10 μm or more, typically 20 μm or more) from the viewpoint of conductivity efficiency, etc., and is 500 μm or less (for example, 300 μm or less, typically from the viewpoint of flexibility, handleability, etc. Specifically, the thickness is preferably 100 μm or less.

  In the interconnector disclosed herein, at least a part (for example, all) of the conductive portion is configured by a conductive adhesive layer (including a first conductive adhesive layer and a second conductive adhesive layer). . The conductive adhesive layer is not particularly limited as long as it has adhesiveness and conductivity. Examples of the conductive adhesive layer include a conductive adhesive sheet, a hot melt type, a thermosetting type, a drying type, a moisture curing type, a two-component reaction curing type, an ultraviolet (UV) curing type, an anaerobic type, and a UV anaerobic type. A conductive adhesive sheet can be used. Above all, from the viewpoint of suppressing the deterioration of the cell characteristics due to heating, various conductive adhesives such as conductive adhesive sheet, dry type, moisture curing type, two-component reaction curing type, UV curing type, anaerobic type, UV anaerobic type, etc. A sheet is preferable, and a conductive adhesive sheet is more preferable from the viewpoint of handleability. The conductive adhesive layer may be a conductive adhesive layer made of urethane, acrylic or epoxy adhesive.

  The conductive adhesive layer typically has conductivity in the thickness direction and the surface direction. The surface direction refers to a direction along the surface of the adhesive layer, or can also be referred to as a direction orthogonal to the thickness direction. The method for imparting conductivity to the adhesive layer is not particularly limited. For example, the adhesive layer can be configured as a conductive adhesive layer by blending a conductive filler described later.

  The conductive pressure-sensitive adhesive sheet, which is a preferred example of the conductive adhesive layer, may be a substrate-less pressure-sensitive adhesive sheet (typically a sheet made of a pressure-sensitive adhesive layer), and a conductive pressure-sensitive adhesive on both surfaces of the conductive substrate. The conductive adhesive sheet in which a layer is formed may be sufficient. The base material-less pressure-sensitive adhesive sheet is typically in a state where both surfaces are protected by a separator before use, and the separator is peeled off and attached to an adherend (for example, a metal layer) before use. The base material-less pressure-sensitive adhesive sheet, for example, peels off the separator that covers one surface (the pressure-sensitive adhesive surface), bonds the pressure-sensitive adhesive surface to the first adherend (for example, a metal layer), and the other surface (the pressure-sensitive adhesive surface). After being stuck on and fixed to the first adherend (for example, a metal layer) by pressing from above the separator that protects the second adherend (for example, the sun) Battery cell).

  A metal foil is preferably used as the conductive substrate. Specifically, the metal foil which consists of copper, aluminum, nickel, silver, iron, lead, tin, these alloys, etc. is mentioned. Of these, aluminum foil and copper foil are preferable, and copper foil is more preferable from the viewpoint of conductivity, workability, and the like. The metal foil may be subjected to various surface treatments such as plating. The thickness of the conductive substrate is not particularly limited. A conductive substrate having a thickness of about 5 to 500 μm (for example, 10 to 300 μm, typically 15 to 100 μm) is preferably used.

  It is preferable that the adhesive layer which comprises the electroconductive adhesive sheet disclosed here has electroconductivity. The base polymer constituting the pressure-sensitive adhesive layer is not particularly limited, and examples thereof include conventionally known base polymers such as rubber polymers such as natural rubber and various synthetic rubbers; acrylic polymers; silicone polymers; vinyl ester polymers. It is done. Especially, it is preferable to use an acrylic polymer as a base polymer from a viewpoint of durability, a weather resistance, and heat resistance. In other words, the pressure-sensitive adhesive layer disclosed herein is preferably a pressure-sensitive adhesive layer (acrylic pressure-sensitive adhesive layer) formed from a pressure-sensitive adhesive composition containing an acrylic polymer as a base polymer. Although content of the acrylic polymer in the said acrylic adhesive layer is not specifically limited, It is preferable that it is 30-75 mass% (for example, 50-75 mass%).

  The pressure-sensitive adhesive layer disclosed herein preferably contains a conductive filler in addition to the base polymer. Thereby, the pressure-sensitive adhesive layer has conductivity. As the conductive filler, known or commonly used fillers can be used. For example, nickel, iron, chromium, cobalt, aluminum, antimony, molybdenum, copper, silver, platinum, gold, tin, bismuth and other metals, alloys or oxides thereof, fillers made of carbon such as carbon black, or these And fillers coated with polymer beads, resin, and the like. These can be used alone or in combination of two or more. Especially, a metal filler and a metal covering filler are preferable, and a silver filler is especially preferable. The silver filler can exhibit stable conductivity over a long period of time. The aspect ratio of the conductive filler is not particularly limited, and is preferably selected from the range of, for example, 1 to 10 (typically 1 to 5). The aspect ratio can be measured with a scanning electron microscope (SEM).

  It is preferable that content of an electroconductive filler is 3 mass parts or more with respect to the total solid (100 mass parts) of the adhesive composition except an electroconductive filler from an electroconductive viewpoint. The content is more preferably 5 parts by mass or more, still more preferably 10 parts by mass or more (for example, 25 parts by mass or more, typically 35 parts by mass or more). From the viewpoint of obtaining good adhesive properties, the content is preferably 250 parts by mass or less, more preferably 150 parts by mass or less, and still more preferably 100 parts by mass or less.

  The above-mentioned pressure-sensitive adhesive composition comprises a tackifier resin, a crosslinking agent, a crosslinking accelerator, an anti-aging agent, a filler, a colorant (pigment, dye, etc.), an ultraviolet absorber, an antioxidant, and a chain transfer agent as necessary. Various additives known in the field of pressure-sensitive adhesives such as plasticizers, softeners, surfactants and antistatic agents may be contained. The pressure-sensitive adhesive layer can be formed by appropriately employing a conventionally known method using the pressure-sensitive adhesive composition as described above.

  The thickness of the conductive adhesive layer (preferably conductive adhesive sheet) disclosed herein is not particularly limited. From the viewpoint of conductivity and the like, the thickness is preferably about 5 to 700 μm (for example, 10 to 300 μm, typically 15 to 100 μm).

  As described above, the solar cell module constructed using the materials disclosed herein has good daylighting properties because a plurality of solar cells are arranged at intervals. Such a solar cell module may be excellent in design. Moreover, since the above-described solar battery cell, covering film, adhesive sealing material, and interconnector can have flexibility, the solar battery module constructed using these flexible materials has excellent flexibility. It may have. Therefore, the application range of the solar cell module is expected to expand in terms of shape adaptability, daylighting property, and design.

  In addition, the solar cell module may not be flexible like the said embodiment. For example, a planar solar cell module may be used. Moreover, the solar cell module may be produced as a solar cell module having a shape including a curved surface by forming or processing the constituent members in advance so as to have a shape that matches the shape of the installation location. In addition, when a solar cell module is not a flexible thing, a photovoltaic cell, a surface coating film, and a back surface coating film do not need to have flexibility.

  Moreover, the shape and size of the solar cell module are not particularly limited. For example, a solar cell module having a major axis (typically length) of 50 cm to 2 m and a minor axis (typically width) of 10 cm to 1 m can be preferably used. The total thickness of the solar cell module is not particularly limited, but is preferably about 10 mm or less (for example, 5 mm or less, typically 0.1 to 1 mm) in consideration of flexibility and the like. The total thickness does not include the thickness of protrusions such as terminal boards.

  Further, the number of solar cells constituting the solar cell group is not particularly limited as long as it is 2 or more. The number of solar cells is preferably 3 or more, more preferably 4 or more, and even more preferably 5 or more (for example, 6 or more, typically 8 or more). The upper limit of the number of solar cells is not particularly limited, but may be approximately 20 or less.

  Moreover, the solar cell module should just be comprised so that between the photovoltaic cells may have translucency, and there is no restriction | limiting in that limit. Accordingly, the solar cells need not be arranged at regular intervals as in the above embodiments, and need not be arranged in parallel. There is no restriction on the size of the interval. Various arrangements can be adopted depending on the lighting characteristics, design characteristics, etc. of the application location.

  Furthermore, although the adhesive sealing material is used in each of the above embodiments, the adhesive sealing material may not be provided. In that case, what is necessary is just to seal a photovoltaic cell group, for example by filling between sealing films (typically between a surface coating film and a back surface coating film) with sealing resins, such as EVA. Alternatively, the solar cell module may be one whose end is fixed by a conventionally known metal frame such as aluminum. It may be a solar cell module in which a metal frame and an adhesive sealing material are used in combination.

  Furthermore, in each said embodiment, although the connector was arrange | positioned at the both ends of the strip | belt-shaped photovoltaic cell, it is not limited to this, It can be attached to the arbitrary locations of a photovoltaic cell. The connector disclosed here may be arrange | positioned only at the one edge part of a photovoltaic cell, for example, or may be arrange | positioned in the center vicinity of the photovoltaic cell. The number of connectors is not particularly limited, and the solar cell module may include three or more connectors. Further, the connector does not have to be an interconnector as used in the above embodiments. For example, the configuration may be such that each of the plurality of physically separated connectors individually wires two solar cells.

  Further, the interconnector disclosed herein is not limited to the configuration of each of the above embodiments. For example, an interconnector for electrically connecting a plurality of solar cells, comprising an insulating layer disposed so as to sandwich the plurality of solar cells, and a conductive portion supported by the insulating layer, The conductive part may be disposed so as to constitute a conductive path between the plurality of solar cells, and at least a part of the conductive part may be an interconnector that is a conductive adhesive layer. Good lighting characteristics can also be obtained by using the above interconnector. Moreover, the solar cell module which has the outstanding flexibility can be implement | achieved suitably. Therefore, in each of the above embodiments, the metal layer as the conductive portion is supported by the insulating layer, but such a metal layer may not be provided. For example, electrical connection of a plurality of solar cells can be easily realized even when only the conductive adhesive layer is supported by the insulating layer as the conductive portion. In that case, when there are a plurality of conductive adhesive layers as conductive parts, a conductive part pattern (typically a conductive adhesive layer pattern) in which the plurality of conductive parts are arranged (supported) independently of each other. ) Is preferably formed. As a suitable example of such a pattern, the same pattern as the metal layer pattern of the above-mentioned embodiment is mentioned, for example.

  Furthermore, in the interconnector according to each of the above embodiments, the conductive adhesive layer is disposed on both the first metal layer and the second metal layer, but the present invention is not limited to this. Even in the configuration in which the conductive adhesive layer is disposed only on one of the first metal layer and the second metal layer, the conductive path between the solar cells can be established.

DESCRIPTION OF SYMBOLS 1 Solar cell module 10 Solar cell group 10a, 10b, 10c Solar cell 20 Surface coating film 21 Back surface coating film 30 Adhesive sealing material 40A, 40B Interconnector

Claims (10)

A solar cell group comprising two or more solar cells,
Each of the two or more solar cells has a strip shape,
The two or more solar cells are arranged at intervals from each other,
A solar cell module configured to have translucency between two adjacent solar cells in the solar cell group.   The solar cell module according to claim 1, which can be installed in a form including a curved surface.   The solar cell module according to claim 1 or 2, wherein the solar cell module is constructed as a flexible solar cell module in which at least one of the longitudinal direction of the solar cells and the direction orthogonal to the longitudinal direction has flexibility. A connector for electrically connecting the solar cell group,
The connector is a long interconnector arranged to span the solar cell group,
The solar cell module according to claim 1, wherein a longitudinal direction of the interconnector has flexibility. A connector for electrically connecting the solar cell group,
The said connector is a solar cell module as described in any one of Claims 1-4 arrange | positioned at the edge part of the said photovoltaic cell. A coating film covering the solar cell group;
The said coating film is a solar cell module as described in any one of Claims 1-5 which has translucency and flexibility.   The solar cell module according to claim 1, which is configured as a frameless solar cell module.   The solar cell module of Claim 7 provided with the adhesive sealing material which seals the edge part of the said solar cell module. A surface coating film covering the surface of the solar cell group, and a back surface coating film covering the back surface of the solar cell group,
The surface coating film and the back coating film both have translucency and flexibility,
The solar cell module according to claim 8, wherein the adhesive sealing material is disposed at a peripheral end portion of the surface covering film and the back surface covering film. The solar cell module according to claim 8 or 9, wherein the adhesive sealing material has a butyl-based adhesive.

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