WO2016031235A1 - 太陽電池モジュール及び太陽電池モジュールの製造方法 - Google Patents
太陽電池モジュール及び太陽電池モジュールの製造方法 Download PDFInfo
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- WO2016031235A1 WO2016031235A1 PCT/JP2015/004271 JP2015004271W WO2016031235A1 WO 2016031235 A1 WO2016031235 A1 WO 2016031235A1 JP 2015004271 W JP2015004271 W JP 2015004271W WO 2016031235 A1 WO2016031235 A1 WO 2016031235A1
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- Prior art keywords
- wiring
- string
- solar cell
- wiring member
- strings
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000000463 material Substances 0.000 claims description 51
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- 238000010030 laminating Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
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- 239000011521 glass Substances 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
- 229910021419 crystalline silicon Inorganic materials 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
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- 238000005336 cracking Methods 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
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- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/02002—Arrangements for conducting electric current to or from the device in operations
- H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
- H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
- H01L31/02013—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising output lead wires elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1876—Particular processes or apparatus for batch treatment of the devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/0488—Double glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Definitions
- the present disclosure relates to a solar cell module and a method for manufacturing the solar cell module.
- a solar cell module in which a string group of solar cells is arranged on a base material having a three-dimensional curvature (hereinafter referred to as “curved base material”) is known (for example, see Patent Document 1).
- curved base material a base material having a three-dimensional curvature
- Patent Document 1 a three-dimensionally curved solar cell module is manufactured by manufacturing a string group on a flat surface from the viewpoint of productivity and the like, and then arranging the string group on a curved base material. It is preferable to manufacture.
- the space between the strings is partially narrowed, and the solar cells may come into contact with each other to cause a short circuit or a cell crack.
- the string group arrange
- a solar cell module that is one embodiment of the present disclosure includes a base material that is curved in a vertical direction and a horizontal direction, a plurality of solar cells that are arranged on the base material, and adjacent solar cells that are connected in the vertical direction. And a first wiring member that forms a plurality of strings in which a plurality of solar cells are arranged in a row, and a first wiring member that extends in the vertical direction from the top of the solar cells located at the ends of the strings.
- a second wiring member that forms a string group by horizontally connecting strings that are at least partially adjacent to each other, and at least a portion of the second wiring member and a string row to which the wiring member is connected
- interval with the photovoltaic cell located in this edge is narrower on the lateral end side than on the lateral central part side of the string group.
- adjacent solar cells are connected in the vertical direction by the first wiring member, and a plurality of strings in which a plurality of solar cells are arranged in a line is formed.
- the second wiring member is connected to the first wiring member extending in the vertical direction from the top of the solar cell located at the end of the string row, and at least a part of the second wiring member is used to connect the adjacent strings horizontally.
- Forming the string group by connecting in a direction, and disposing the string group on a base material that is curved in the vertical direction and the horizontal direction, and forming at least a part of the second group when forming the string group.
- the distance between the wiring member and the solar cell located at the end of the string row to which the wiring member is connected is smaller on the lateral end side than on the lateral center side of the string group. 2 wiring materials first To connect to the wire.
- a favorable arrangement state of solar cells can be obtained without causing a short circuit due to contact between solar cells, cell cracking, or the like. Further, the load on the wiring material can be reduced and the reliability can be improved.
- vertical direction and “horizontal direction” are used as terms indicating directions.
- the vertical direction is a direction in which solar cells constituting the string are arranged.
- the horizontal direction is a direction orthogonal to the vertical direction, and is a direction in which the strings constituting the string group are arranged.
- the description “providing the second member on the first member” does not intend only when the first and second members are provided in direct contact unless specifically limited. That is, this description includes a case where another member exists between the first and second members.
- a surface on which sunlight mainly enters is referred to as a “light receiving surface”, and a surface opposite to the light receiving surface is referred to as a “back surface”.
- the terms light receiving surface and back surface are also used for components such as solar cells.
- FIGS. 1 and 2 are a perspective view and a plan view, respectively, of the solar cell module 10 viewed from the light receiving surface side.
- FIG. 3 is a diagram showing a part of a longitudinal section of the solar cell module 10.
- the solar cell module 10 includes a plurality of solar cells 11, a first protection member 12 provided on the light receiving surface side of the solar cells 11, and the back surface side of the solar cells 11. And a second protective member 13 provided on the head.
- the plurality of solar cells 11 are sandwiched between the first protective member 12 and the second protective member 13 and sealed with a filler 14 (see FIG. 3) filled between the protective members.
- the solar cell module 10 includes a base material that is curved in the vertical direction and the horizontal direction, and has a three-dimensionally curved shape.
- the first protective member 12 is a base material having a three-dimensional curvature that is curved in the vertical direction and the horizontal direction.
- the second protection member 13, the filler 14, and the string group 30 are arranged on the first protection member 12, and the solar cell module 10 curved three-dimensionally. Is obtained.
- the solar cell module 10 connects the adjacent solar cells 11 in the vertical direction, and forms a plurality of strings 20 (see FIGS. 1 and 2) in which the plurality of solar cells 11 are arranged in a row. 21 is provided.
- the first wiring member 21 bends in the thickness direction of the module between adjacent solar cells 11, and forms an electrode on the light receiving surface side of one solar cell 11 and an electrode on the back surface side of the other solar cell 11. Each is attached using an adhesive or the like (see FIG. 3).
- the solar cell module 10 includes a second wiring member 31 (see FIGS. 1 and 2) connected to a first wiring member 21 extending in the vertical direction from the top of the solar cells 11 positioned at the end of the string 20. . At least some of the second wiring members 31 form a string group 30 by connecting adjacent strings 20 in the horizontal direction. That is, the string group 30 includes a plurality of strings 20 and a plurality of second wiring members 31. In the present embodiment, six strings 20 of strings 20 (strings 20a, 20b, 20c, 20d, 20e, and 20f in order from the left in FIG. 2) are arranged in the horizontal direction to form the string group 30.
- the solar cell module 10 preferably includes a terminal portion 15 (see FIGS. 1 and 2) to which at least a part of the second wiring member 31 is connected.
- the terminal portion 15 is provided on the back side of the second protective member 13, and the four second wiring members 31 disposed on one end side in the vertical direction of the solar cell module 10 are connected to the terminal portion 15. ing.
- the four second wiring members 31 two connect adjacent strings 20, and the remaining two connect one row of strings 20 and the terminal portion 15. It is preferable that a power cable connected to an external device is connected to the terminal portion 15 and a bypass diode for stabilizing the output is provided.
- the solar battery cell 11 includes a photoelectric conversion unit that generates carriers by receiving sunlight.
- the photoelectric conversion unit includes, for example, a light receiving surface electrode formed on the light receiving surface of the photoelectric conversion unit and a back electrode formed on the back surface (both not shown) as electrodes for collecting the generated carriers.
- a wiring material 21 is connected to each electrode.
- the structure of the photovoltaic cell 11 is not limited to this, For example, the structure in which the electrode was formed only on the back surface of a photoelectric conversion part may be sufficient.
- the back electrode is preferably formed in a larger area than the light receiving surface electrode, and the surface having the larger electrode area (or the surface on which the electrode is formed) can be said to be the back surface of the solar battery cell 11.
- the photoelectric conversion unit includes, for example, a semiconductor substrate such as crystalline silicon (c-Si), gallium arsenide (GaAs), and indium phosphide (InP), an amorphous semiconductor layer formed on the semiconductor substrate, and an amorphous semiconductor A transparent conductive layer formed on the layer.
- a semiconductor substrate such as crystalline silicon (c-Si), gallium arsenide (GaAs), and indium phosphide (InP)
- an amorphous semiconductor layer formed on the semiconductor substrate and an amorphous semiconductor A transparent conductive layer formed on the layer.
- an i-type amorphous silicon layer, a p-type amorphous silicon layer, and a transparent conductive layer are sequentially formed on one surface of an n-type single crystal silicon substrate, and an i-type non-crystalline layer is formed on the other surface.
- Examples include a structure in which a crystalline silicon layer, an n-type amorphous silicon layer, and a transparent conductive
- first protection member 12 and the second protection member 13 for example, a glass substrate, a resin substrate, a resin film, or the like can be used.
- a member having translucency is applied to the first protective member 12, and it is preferable to use a glass substrate from the viewpoint of fire resistance, durability, and the like.
- the thickness of the glass substrate is, for example, about 2 to 6 mm.
- the second protective member 13 may be a transparent member or an opaque member.
- a resin film is used for the second protection member 13.
- the thickness of the resin film is, for example, about 50 to 300 ⁇ m.
- the first protective member 12 is used as a base material curved in the vertical direction and the horizontal direction.
- the first protective member 12 is not particularly limited as long as it has a curved surface that is curved in the vertical direction and the horizontal direction.
- the first protective member 12 has a curved surface having a three-dimensional curvature, such as a shape obtained by cutting a part of a spherical surface.
- the curvature of the first protective member 12 is not particularly limited, and may be constant throughout the first protective member 12 or may be different in some regions. In the following description, it is assumed that the curvature of the first protective member 12 is substantially constant.
- the first protective member 12 is a transparent glass substrate having a substantially constant curvature, for example, three-dimensionally curved, and has a substantially rectangular shape in plan view.
- substantially ** is intended to include what is recognized as being substantially constant as well as being completely constant when described by taking substantially constant as an example.
- the filler 14 fills the gap between the solar battery cell 11 and each protection member and serves to seal the solar battery cell 11. It is preferable that the filler 14 is mainly composed of a resin that can be applied to a laminating process described later. Examples of the resin include ethylene vinyl acetate copolymer (EVA) and polyvinyl butyral (PVB).
- EVA ethylene vinyl acetate copolymer
- PVB polyvinyl butyral
- the filler 14 may contain various additives such as an antioxidant, a flame retardant, and an ultraviolet absorber, and the filler 14 disposed on the back side of the solar battery cell 11 includes titanium oxide or the like. A pigment may be included.
- FIG. it is narrower on the lateral end side than on the lateral central portion side of the string group 30.
- the string group 30 includes, for example, a long wiring member 31L longer than the horizontal length of two rows of the strings 20 among the second wiring members 31 connected to the terminal portion 15.
- the strings 20a and 20f located at both ends of the string group 30 are connected to the terminal portion 15 by long wiring members 31La and 31Lb, respectively.
- the adjacent strings 20b and 20c and the strings 20d and 20e are connected by the second wiring members 31a and 31b, respectively, and one end of the wiring member is connected to the terminal portion 15.
- column of the string 20a to which the said wiring material is connected is a horizontal direction edge part side rather than the horizontal direction center part side of the string group 30. It is narrowed by.
- the distance between the long wiring member 31Lb and the solar cells 11 positioned at the ends of the strings 20f to which the wiring member is connected is also narrower on the lateral end side than the lateral center side of the string group 30. It has become. In other words, the distance between the long wiring members 31La and 31Lb and the solar battery cells 11 of each string to which the wiring members are connected is more than the lateral center portion of the first protective member 12 that is a curved base material.
- each second wiring member 31 is symmetrical with respect to the central portion in the horizontal direction of the string group 30, the following description will be given taking the string 20a and the long wiring member 31La as an example.
- the plurality of first wiring members 21 extend in the vertical direction from the top of the solar cells 11 located at the end of the row and are connected to the long wiring member 31La.
- the string 20a (the same applies to the other strings 20 in this embodiment), for example, two adjacent solar cells 11 are connected by three first wiring members 21 arranged in the horizontal direction.
- the length of each first wiring member 21, at least the length extending in the vertical direction from the top of the solar cells 11 located at the end of the string 20 a (extension length), is the width of the string group 30. It is preferable that the length becomes shorter as approaching the direction end.
- the extension length of the three first wiring members 21 of the string 20a is the first wiring member 21a ⁇ 21b ⁇ 21c. is there.
- the long wiring member 31La is connected to the tip of each first wiring member.
- interval of the elongate wiring material 31La and the photovoltaic cell 11 of the string 20a becomes narrow at the horizontal direction edge part side rather than the horizontal direction center part side of the string group 30.
- the long wiring member 31La is preferably curved along the curved surface of the first protective member 12.
- the long wiring member 31La is curved so that the curvature along the curved surface of the first protective member 12 is along a virtual curve ⁇ having a constant curvature.
- the distortion of the long wiring material 31La is reduced, and the load applied to the wiring material is reduced.
- the long wiring member 31La is curved along the virtual curve ⁇ , a part of the string 20 (for example, the string 20a) is easily moved to the inside of the string group 30.
- the said movement is suppressed by adjustment of the space
- the distance between the second wiring member 31a and each of the solar cells 11 of the strings 20b and 20c is substantially the same.
- interval of the 2nd wiring material 31b and each photovoltaic cell 11 of the strings 20d and 20e is substantially the same.
- the extension lengths of the first wiring members 21 in these strings are also substantially the same. Note that the distance between the second wiring members 31a and 31b and the solar cells 11 of each string to which the wiring member is connected is made narrower on the lateral end side than on the lateral center side of the string group 30. Also good. Further, the extension length of the first wiring member 21 is made substantially the same, and the connection position with the second wiring member 31 is changed to adjust the distance between the second wiring member 31 and the solar cell 11 of the string 20. It is also possible to do.
- the solar cell module 10 having the above-described configuration can be manufactured by laminating the string group 30 using a resin sheet constituting the first protective member 12, the second protective member 13, and the filler 14.
- the first protective member 12, the first resin sheet constituting the filler 14, the string group 30, the second resin sheet constituting the filler 14, and the second protective member 13 are sequentially laminated on the heater. Is done.
- the string group 30 is arranged on the first protective member 12 after being manufactured on a plane as described later from the viewpoint of productivity and the like.
- This laminated body is heated to a temperature at which the resin sheet constituting the filler 14 is softened in a vacuum state, for example.
- the solar cell module 10 is obtained by laminating each member by continuing heating while pressing each component member on the heater side under atmospheric pressure.
- FIG. 4 shows a group of strings 30 (before being placed on a substrate) manufactured on a plane.
- the string group 30 includes a first wiring member 21 that connects a plurality of solar cells 11 in a vertical direction to form a string 20 on a plane, and the first wiring member 21 of each string. It is manufactured by connecting the second wiring member 31.
- the second wiring members 31a and 31b have an L shape, and most of the second wiring members 31a and 31b extend in the lateral direction, and the first wiring members 21 of the strings 20b and 20c and the strings 20d and 20e are respectively Each is connected to the wiring member 21.
- the long wiring members 31La and 31Lb also have an L-shape, but are not extended straight in the horizontal direction like the second wiring materials 31a and 31b, and the strings approach the horizontal central portion of the string group 30. It is inclined in the vertical direction so as to be away from 20.
- the string group 30 having such a shape on the first protective member 12 and laminating with each of the above constituent members, the long wiring member 31La is bent along the curved surface of the first protective member 12, The solar cell module 10 having the configuration is obtained.
- an example of the manufacturing method of the solar cell module 10 includes the following procedure.
- Adjacent solar battery cells 11 are connected in the vertical direction by the first wiring member 21 to form a plurality of strings 20 in which a plurality of solar battery cells 11 are arranged in a line.
- the second wiring member 31 is connected to the first wiring member 21 extending in the vertical direction from the top of the solar cells 11 positioned at the end of the string 20, and is adjacent by at least a part of the second wiring member 31.
- a string group 30 is formed by connecting the matching strings 20 in the horizontal direction.
- the string group 30 is disposed on the first protective member 12 that is a base material that is curved in the vertical direction and the horizontal direction.
- the distance between at least a part of the second wiring members 31 and the solar cells 11 located at the ends of the columns of the strings 20 to which the wiring members are connected is set in the string group 30. It is narrower on the side in the lateral direction than on the side in the lateral direction. That is, the second wiring member 31 is connected to the first wiring member 21 so that the interval is narrower on the side in the horizontal direction than on the side in the horizontal direction of the string group 30.
- the long wiring member 31La and the solar cell 11 of the string 20a are arranged so that the distance between the string group 30 is narrower on the lateral end side than on the lateral center side.
- the wiring member is connected to the first wiring member 21 (the same applies to the case of the long wiring member 31Lb).
- a plurality of first wiring members 21 are extended from above the solar cells 11 positioned at the end of the row of strings 20 a, and the length of each first wiring member is set at the lateral end of the string group 30. The closer the length is, the shorter the wiring material 31La is connected to the tip of each first wiring material.
- the distortion of each wiring material is small, and the load applied to the wiring material is reduced.
- the solar cell module 10 even when the second wiring member 31 is curved so as to follow the curved surface of the first protective member 12, the spacing between the strings 20 is easily maintained constant. Thereby, the favorable arrangement
- the solar cell module 50 which is 2nd Embodiment is demonstrated in detail, referring FIG.5 and FIG.6.
- the same components as those in the above embodiment are denoted by the same reference numerals, and redundant description is omitted.
- the strings 20 constituting the string group 51 are in seven rows, and the second wiring member 52 is not symmetrical with respect to the central portion in the horizontal direction of the string group 51.
- the distance between the long wiring members 52La and 52Lb and the solar cells 11 located at the ends of the columns of the strings 20 to which the wiring members are connected is a terminal in the lateral direction of the string group 51. It is narrower on the side farther from the terminal part 15 than on the side closer to the part 15.
- the solar cell module 50 is different from the long wiring members 31La and 31Lb of the solar cell module 10 in that the long wiring members 52La and 52Lb both connect the adjacent strings 20 to each other.
- the extension length of the six first wiring members 21 connected to the long wiring member 52La (the same applies to the long wiring member 52Lb) is closer to the terminal portion 15 than the side closer to the terminal portion 15 of the string group 51. Shorten on the far side. That is, the extension lengths of the six first wiring members 21 are the first wiring members 21a ⁇ 21b ⁇ 21c ⁇ 21d ⁇ 21e ⁇ 21f.
- the string group 51 is first manufactured on a plane. Also in this case, a plurality of first wiring members 21 are extended from above the solar cells 11 located at the ends of the strings 20, and the length of each first wiring member approaches the lateral end of the string group 51. Keep it short. Then, the long wiring members 52La and 52Lb are respectively connected to the distal ends of the first wiring members. By arranging the string group 51 thus manufactured on the first protective member 12 and laminating with the above constituent members, the long wiring members 52La and 52Lb are curved so as to follow the curved surface of the first protective member 12. And the solar cell module 50 provided with the said structure is obtained.
- the mode in which the distance between the long wiring material and the string solar cell changes is illustrated.
- the distance between the wiring material shorter than the horizontal length of two strings and the string solar cell is based on the interval.
- the form may be narrower on the side in the lateral direction than on the side in the lateral direction of the material.
- the distance between all the second wiring members including the second wiring member that connects only the adjacent strings and the solar cells of the strings is more lateral than the central portion in the lateral direction of the base material. The form which became narrow at the edge part side may be sufficient.
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Abstract
Description
実施形態において参照する図面は、模式的に記載されたものであり、図面に描画された構成要素の寸法比率などは、現物と異なる場合がある。具体的な寸法比率等は、以下の説明を参酌して判断されるべきである。
以下、図1~図4を参照しながら、第1実施形態である太陽電池モジュール10について詳細に説明する。図1及び図2は、それぞれ、太陽電池モジュール10を受光面側から見た斜視図、平面図である。図3は、太陽電池モジュール10の縦方向断面の一部を示す図である。
図4に示すように、ストリング群30は、平面上において、第1配線材21により複数の太陽電池セル11を縦方向に接続してストリング20を形成し、当該各ストリングの第1配線材21に第2配線材31を接続して製造される。本実施形態では、第2配線材31a,31bがL字形状を有し、その大部分が横方向に延設されて、ストリング20b,20cの各第1配線材21、ストリング20d,20eの各配線材21にそれぞれ接続されている。
(1)隣り合う太陽電池セル11同士を第1配線材21により縦方向に接続して、複数の太陽電池セル11が一列に並んだ複数のストリング20を形成する。
(2)ストリング20の列の端に位置する太陽電池セル11上から縦方向に延出する第1配線材21に第2配線材31を接続し、少なくとも一部の第2配線材31により隣り合うストリング20同士を横方向に接続してストリング群30を形成する。
(3)縦方向及び横方向に湾曲する基材である第1保護部材12上にストリング群30を配置する。
そして、ストリング群30を形成するときに、少なくとも一部の第2配線材31と、当該配線材が接続されるストリング20の列の端に位置する太陽電池セル11との間隔をストリング群30の横方向中央部側よりも横方向端部側で狭くする。即ち、当該間隔がストリング群30の横方向中央部側よりも横方向端部側で狭くなるように、当該第2配線材31を第1配線材21に接続する。
以下、図5及び図6を参照しながら、第2実施形態である太陽電池モジュール50について詳細に説明する。以下では、上記実施形態と同様の構成要素には同じ符号を用いて重複する説明を省略する。
Claims (7)
- 縦方向及び横方向に湾曲する基材と、
前記基材上に配置される複数の太陽電池セルと、
隣り合う前記太陽電池セル同士を縦方向に接続して、複数の前記太陽電池セルが一列に並んだ複数のストリングを形成する第1配線材と、
前記ストリングの列の端に位置する前記太陽電池セル上から縦方向に延出する前記第1配線材に接続され、少なくとも一部が隣り合う前記ストリング同士を横方向に接続してストリング群を形成する第2配線材と、
を備え、
少なくとも一部の前記第2配線材と、当該配線材が接続される前記ストリングの列の端に位置する前記太陽電池セルとの間隔は、前記ストリング群の横方向中央部側よりも横方向端部側で狭くなっている、太陽電池モジュール。 - 少なくとも一部の前記第2配線材が接続される端子部を備え、
前記端子部に接続される前記第2配線材のうち前記ストリングの2列分の横方向長さよりも長い長尺配線材と、当該配線材に接続される前記ストリングの列の端に位置する前記太陽電池セルとの間隔が、前記ストリング群の横方向で前記端子部に近い側よりも前記端子部に遠い側で狭くなっている、請求項1に記載の太陽電池モジュール。 - 前記第1配線材は、前記ストリングの列の端に位置する前記太陽電池セル上から縦方向に複数延出して前記長尺配線材と接続され、
当該各第1配線材の長さが、前記ストリング群の横方向で前記端子部に近い側よりも前記端子部に遠い側で短くなっている、請求項2に記載の太陽電池モジュール。 - 前記長尺配線材は、前記基板の曲面に沿って湾曲している、請求項2又は3に記載の太陽電池モジュール。
- 隣り合う太陽電池セル同士を第1配線材により縦方向に接続して、複数の前記太陽電池セルが一列に並んだ複数のストリングを形成することと、
前記ストリングの列の端に位置する前記太陽電池セル上から縦方向に延出する前記第1配線材に第2配線材を接続し、少なくとも一部の前記第2配線材により隣り合う前記ストリング同士を横方向に接続してストリング群を形成することと、
縦方向及び横方向に湾曲する基材上に前記ストリング群を配置することと、
を含み、
前記ストリング群を形成するときに、少なくとも一部の前記第2配線材と、当該配線材が接続される前記ストリングの列の端に位置する前記太陽電池セルとの間隔が、前記ストリング群の横方向中央部側よりも横方向端部側で狭くなるように、当該第2配線材を前記第1配線材に接続する、太陽電池モジュールの製造方法。 - 端子部に接続される前記第2配線材のうち前記ストリングの2列分の横方向長さよりも長い長尺配線材と、当該配線材に接続される前記ストリングの列の端に位置する前記太陽電池セルとの間隔が、前記ストリング群の横方向で前記端子部に近い側よりも前記端子部に遠い側で狭くなるように、当該長尺配線材を前記第1配線材に接続する、請求項5に記載の製造方法。
- 前記ストリングの列の端に位置する前記太陽電池セル上から前記第1配線材を複数延出させ、当該各第1配線材の長さを前記ストリング群の横方向で前記端子部に近い側よりも前記端子部に遠い側で短くし、
当該各第1配線材の先端部に前記長尺配線材を接続する、請求項6に記載の製造方法。
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