JP6433703B2 - Connection jig and photovoltaic power generation unit provided with the connection jig - Google Patents

Description

  The present invention relates to a jig for a solar cell module, and more particularly to a connection jig for fixing a plurality of solar cell modules while being electrically connected.

  Conventionally, solar cells that directly convert solar energy into electric energy have been expected as a next-generation energy source, and their development has been promoted.

  When the solar battery modules in which the solar battery cells are formed on the substrate are electrically connected, the solar battery modules are connected by wiring or the like.

  In order to eliminate the need for wiring between such solar cell modules, for example, Patent Document 1 proposes a fixing member (connection jig) that can electrically connect adjacent solar cell modules.

JP 2012-195540 A (released on October 11, 2012)

  Here, when installing solar cell modules on the outer wall, etc., it is necessary to install multiple solar cell modules in a single row direction, or to install solar cell modules in the same direction. From the viewpoint, the arrangement of solar cell modules is limited. On the other hand, the output current is limited due to limitations such as the size of the solar cell module.

  Therefore, in order to output a desired current, it is necessary to connect a plurality of solar cell modules in combination in series and parallel.

  However, since the conventional connection jig can only connect adjacent solar cell modules, it is necessary to use external wiring separately to connect non-adjacent solar cell modules.

  FIG. 31A is a bottom view showing a configuration in which the solar cell modules 103a to 103e are connected using the conventional connecting jig 104, and FIG. 31B is a view shown in FIG. 31 is a conceptual diagram for explaining the electrical connection relationship of the solar cell modules 103a to 103e. FIG. 31C is a cross-sectional view in the A column shown in FIG. (D) of FIG. 31 is sectional drawing in the B row shown by (a) of FIG.

  As shown in (a) to (d) of FIG. 31, for example, among the solar cell modules 103 a to 103 e arranged in a line direction, the solar cell modules 103 c, 103 d, and 103 e connected in series are connected in series. When the solar cell modules 103a and 103b are connected in parallel, in addition to the connection by the connection jig 104, connection by the external wiring 105 is required. Specifically, the positive electrode 160 of the solar cell module 103a and the positive electrode 160 of the solar cell module 103c, and the negative electrode 161 of the solar cell module 103b and the negative electrode 161 of the solar cell module 103e are connected by the external wiring 105. There is a need.

  Thus, since the conventional connection jig can only connect between adjacent solar cell modules, there is a problem in that external wiring needs to be used to connect non-adjacent solar cell modules.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a connection jig that enables series-parallel connection between solar cell modules that are not adjacent to each other without using external wiring, and the connection jig. It is to provide a photovoltaic power generation unit provided with a tool.

  In order to solve the above-described problem, a connection jig according to one embodiment of the present invention electrically connects a plurality of solar cell modules in which electrodes are provided on a back surface that is a surface opposite to a light receiving surface that receives sunlight. A connection jig that is connected in a conductive manner, and a conductive light-receiving surface jig disposed on the light-receiving surface so as to extend in the arrangement direction of the solar cell module, and disposed at an end of the solar cell module, At least a conductive back surface jig for electrically connecting the electrode and the conductive light receiving surface jig; and the conductive back surface jig is coupled to the conductive light receiving surface jig. Thus, the electrodes of the plurality of solar cell modules are electrically connected.

  According to one aspect of the present invention, it is possible to provide a connection jig that enables series-parallel connection between non-adjacent solar cell modules without using external wiring, and a solar power generation unit including the connection jig. There is an effect that can be done.

It is a bottom view which shows the external appearance of the photovoltaic power generation unit of Embodiment 1. It is sectional drawing of the solar cell module shown by FIG. It is sectional drawing for demonstrating the layer structure of the dye-sensitized solar cell which the solar cell module shown by FIG. 2 has. It is a conceptual diagram for demonstrating the electrical connection relationship of the solar cell module shown by FIG. (A)-(d) is the schematic which shows an example of a back surface jig | tool, an upper stage is a top view and a lower stage is sectional drawing. (A)-(g) is the schematic which shows an example of a light-receiving surface jig | tool, an upper stage is a top view and a lower stage is sectional drawing. It is a bottom view which shows the connection state between the solar cell modules in the photovoltaic power generation unit shown by FIG. (A) is sectional drawing of the photovoltaic power generation unit in the A row | line | column shown by FIG. 7, (b) is sectional drawing of the photovoltaic power generation unit in the B row | line | column shown by FIG. The conductive member for taking out an electric current from a solar power generation unit is shown, (a) is a top view of a conductive member, (b) is a sectional view of a conductive member. It is sectional drawing which shows the example of attachment of the electrically-conductive member shown by (a) and (b) of FIG. (A) is a bottom view for demonstrating the assembly method of a photovoltaic power generation unit, (b) is a pp 'end view of (a), (c) is q of (a) -q 'is an end view. (A) is a bottom view showing a state in which a solar cell module is inserted into the frame body shown in FIG. 11, and (b) is an r-r ′ end view shown in (a). It is a bottom view which shows the assembled photovoltaic power generation unit. It is a bottom view which shows the external appearance of the photovoltaic power generation unit of Embodiment 2. It is a conceptual diagram for demonstrating the electrical connection relationship of the solar cell module shown by FIG. It is a bottom view which shows the connection state between the solar cell modules in the photovoltaic power generation unit shown by FIG. (A) is sectional drawing of the photovoltaic power generation unit in the A row | line | column shown by FIG. 16, (b) is sectional drawing of the photovoltaic power generation unit in the B row | line | column shown by FIG. It is a bottom view which shows the external appearance of the photovoltaic power generation unit of Embodiment 3. It is a conceptual diagram for demonstrating the electrical connection relation of the solar cell module shown by FIG. It is a bottom view which shows the connection state between the solar cell modules in the photovoltaic power generation unit shown by FIG. (A) is sectional drawing of the photovoltaic power generation unit in the A row | line | column shown by FIG. 20, (b) is sectional drawing of the photovoltaic power generation unit in the B row | line | column shown by FIG. It is a bottom view which shows the external appearance of the solar power generation unit of Embodiment 4. It is a conceptual diagram for demonstrating the electrical connection relationship of the solar cell module shown by FIG. It is a bottom view which shows the connection state between the solar cell modules in the photovoltaic power generation unit shown by FIG. (A) is sectional drawing of the photovoltaic power generation unit in A row | line | column shown by FIG. 24, (b) is sectional drawing of the photovoltaic power generation unit in B row | line | column shown by FIG. It is an enlarged view which shows the inside of the broken-line frame shown by (b) of FIG. It is a bottom view which shows the external appearance of the solar power generation unit of Embodiment 5. It is a conceptual diagram for demonstrating the electrical connection relationship of the solar cell module shown by FIG. It is a bottom view which shows the connection state between the solar cell modules in the photovoltaic power generation unit shown by FIG. (A) is sectional drawing of the photovoltaic power generation unit in the A row | line | column shown by FIG. 29, (b) is sectional drawing of the photovoltaic power generation unit in the B row | line | column shown by FIG. (A) is a bottom view which shows the structure which connected the solar cell module using the conventional connection jig, (b) demonstrates the electrical connection relation of the solar cell module shown by (a). (C) is sectional drawing in the A column shown by (a), (d) is sectional drawing in the B column shown by (a).

Embodiment 1
The embodiment of the present invention will be described below with reference to FIGS. In the present embodiment, an example of a photovoltaic power generation unit including the connection jig according to the present invention will be described.

<Configuration of photovoltaic power generation unit 1>
FIG. 1 is a bottom view showing the appearance of the photovoltaic power generation unit 1 of the present embodiment. This solar power generation unit 1 fixes a plurality of solar cell modules 3a to 3d arranged in one direction while being electrically connected by a connecting jig 4, so that the solar cell module 3a is used without using external wiring. This enables a free combination of series-parallel connections between ˜3d.

  As shown in FIG. 1, the solar power generation unit 1 includes a frame portion 2, solar cell modules 3 a to 3 d, and a connection jig 4.

[Frame part 2]
The frame part 2 is a frame-like member that supports the solar cell modules 3a to 3d. The frame unit 2 includes a frame main body 21 and a side wall plate 22.

(Frame body 21)
The frame body 21 is a frame-like member having one end opened, in which the solar cell modules 3a to 3d and the connection jig 4 can be inserted from one direction. The frame main body 21 extends in the arrangement direction of the solar cell modules 3a to 3d on the inner side thereof, and guide portions 25 that define the arrangement positions of the solar cell modules 3a to 3d and the connection jig 4 (see FIG. 11C). )have. Details of the guide unit 25 will be described later.

(Sidewall 22)
The side wall plate 22 is a plate-like member that closes the opened end of the frame body 21. The side wall plate 22 closes one end of the frame body 21 in order to prevent the solar cell module 3 and the connection jig 4 inserted into the frame body 21 from falling off.

[Solar cell modules 3a to 3d]
The solar cell modules 3a to 3d convert light energy of sunlight into electric energy and output it by the photovoltaic effect.

  2 is a cross-sectional view of the solar cell module 3a shown in FIG. 1, and FIG. 3 is a cross-sectional view for explaining the layer structure of the dye-sensitized solar cell 5 included in the solar cell module 3a shown in FIG. FIG.

  The solar cell modules 3a to 3d have the same structure. Therefore, only the solar cell module 3a will be described here, and the description of the solar cell modules 3b to 3d will be omitted.

  As shown in FIG. 2, in the solar cell module 3 a, the dye-sensitized solar cell 5, the positive electrode 60, and the negative electrode 61 are formed on the translucent substrate 50 via the transparent conductive layer 51. The translucent substrate 50 and the transparent conductive layer 51 constitute a so-called transparent electrode substrate.

  The solar cell module 3a is a back electrode type solar cell module in which a positive electrode 60 and a negative electrode 61 are provided on a back surface 31 that is a surface opposite to the light receiving surface 32 that receives sunlight. In the present embodiment, the solar cell module 3 a has four dye-sensitized solar cells 5 connected in series on the transparent conductive layer 51.

(Dye-sensitized solar cell 5)
The dye-sensitized solar cell 5 converts the light energy of sunlight into electric energy by the photovoltaic effect. As shown in FIG. 3, the dye-sensitized solar cell 5 is formed on a translucent substrate 50 via a transparent conductive layer 51, and includes a separation line 52, a photoelectric conversion layer 53, a porous insulating layer 54, A catalyst layer 55, a counter electrode conductive layer 56, a sealing material 57, a carrier transport layer 58, and a support substrate 59 are included.

(Translucent substrate 50)
The light transmissive substrate 50 is a light transmissive plate-like member disposed on the light receiving surface 32 side of the solar cell module 3a. The material which comprises the translucent board | substrate 50 will not be specifically limited if it can generally be used for a solar cell. Examples of such materials include glass substrates such as soda glass, fused silica glass, and crystal quartz glass, and heat resistant resin plates such as flexible films.

  Examples of the material constituting the flexible film include tetraacetyl cellulose (TAC), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polycarbonate (PC), polyarylate (PA), and polyetherimide (PEI). , Phenoxy resin, Teflon (registered trademark), and the like.

  The translucent substrate 50 is preferably made of a material that transmits light having a wavelength sensitive to the dye (sensitizing dye) contained in the photoelectric conversion layer 53.

(Transparent conductive layer 51)
The transparent conductive layer 51 is a light transmissive conductive layer formed on the translucent substrate 50. Similar to the translucent substrate 50, the transparent conductive layer 51 may be any material that substantially transmits light having a wavelength having effective sensitivity to at least the dye contained in the photoelectric conversion layer 53, and not necessarily all wavelengths. There is no need to be transparent to the light in the region.

  The light transmissive material is not particularly limited as long as it is generally usable for solar cells. Examples of such materials include indium tin composite oxide (ITO), fluorine-doped tin oxide (FTO), and zinc oxide (ZnO).

(Separation line 52)
The separation line 52 separates the transparent conductive layer 51. The dye-sensitized solar cell 5 is formed by forming the photoelectric conversion layer 53 on one side insulated by the separation line 52 and electrically connecting the counter electrode conductive layer 56 to the opposite side. The separation line 52 is formed, for example, by cutting the transparent conductive layer 51 in advance by laser scribing.

(Photoelectric conversion layer 53)
The photoelectric conversion layer 53 is one in which a dye is adsorbed by immersing a porous electrode film prepared by applying, drying or baking a solution containing semiconductor particles such as titanium oxide in a dye adsorption solution.

The semiconductor material constituting the porous electrode film is not particularly limited as long as it is generally usable for a photoelectric conversion material. Examples of such materials include titanium oxide, zinc oxide, tin oxide, iron oxide, niobium oxide, cerium oxide, tungsten oxide, nickel oxide, strontium titanate, cadmium sulfide, lead sulfide, zinc sulfide, indium phosphide, Examples include compounds such as copper-indium sulfide (CuInS ₂ ), CuAlO ₂ , SrCu ₂ O ₂ , and combinations thereof. Among these, titanium oxide, zinc oxide, tin oxide, and niobium oxide are preferable, and titanium oxide is particularly preferable from the viewpoint of photoelectric conversion efficiency, stability, and safety. Moreover, these semiconductor materials can also be used as a mixture of two or more.

  The semiconductor material constituting the porous electrode film is preferably a polycrystalline sintered body composed of fine particles from the viewpoints of stability, ease of crystal growth, manufacturing cost, and the like. The light scattering property of the porous electrode film can be adjusted by the particle diameter (average particle diameter) of the semiconductor material used for layer formation.

  Examples of the dye that functions as a photosensitizer by being adsorbed on the porous electrode film include organic dyes and metal complex dyes that absorb in various visible light regions and / or infrared light regions. One type or two or more types can be selectively used.

  Examples of organic dyes include azo dyes, quinone dyes, quinone imine dyes, quinacridone dyes, squarylium dyes, cyanine dyes, merocyanine dyes, triphenylmethane dyes, xanthene dyes, porphyrin dyes, and perylenes. And dyes such as indigo dyes and naphthalocyanine dyes.

  The absorption coefficient of organic dyes is generally larger than that of metal complex dyes in which molecules are coordinated to transition metals.

  As metal complex dyes, Cu, Ni, Fe, Co, V, Sn, Si, Ti, Ge, Cr, Zn, Ru, Mg, Al, Pb, Mn, In, Mo, Y, Zr, Nb, Sb, Metals such as La, W, Pt, Ta, Ir, Pd, Os, Ga, Tb, Eu, Rb, Bi, Se, As, Sc, Ag, Cd, Hf, Re, Au, Ac, Tc, Te, Rh Among them, phthalocyanine dyes and ruthenium dyes are preferable, and ruthenium metal complex dyes are particularly preferable.

  For example, a ruthenium-based metal complex dye such as N719 manufactured by Solaronix represented by the following formula (1), or Black Dye manufactured by Solaronix represented by the following formula (2) can be used.

  In order to firmly adsorb the dye to the porous electrode film, a carboxylic acid group, a carboxylic acid anhydride group, an alkoxy group, a hydroxyl group, a hydroxyalkyl group, a sulfonic acid group, an ester group, a mercapto group, Those having an interlock group such as a phosphonyl group are preferred. Among these, a carboxylic acid group and a carboxylic anhydride group are particularly preferable. The interlock group provides an electrical bond that facilitates electron transfer between the excited dye and the conduction band of the porous electrode film.

(Porous insulating layer 54)
The porous insulating layer 54 is formed by applying, drying, or baking a paste obtained by dispersing a particulate insulating material in a solvent and mixing a polymer compound such as ethyl cellulose on the photoelectric conversion layer 53. . As the material of the porous insulating layer 54, a material having a high conduction band level such as glass, zirconium oxide, silicon oxide, aluminum oxide, niobium oxide, strontium titanate, or the like is used.

(Catalyst layer 55)
The catalyst layer 55 is formed on the porous insulating layer 54. The material constituting the catalyst layer 55 is not particularly limited as long as it is generally usable for solar cells. As such a material, for example, platinum and carbon are preferable. As the form of carbon, carbon black, graphite, glass carbon, amorphous carbon, hard carbon, soft carbon, carbon whisker, carbon nanotube, fullerene and the like are preferable.

(Counter electrode conductive layer 56)
The counter electrode conductive layer 56 is a conductive layer formed on the catalyst layer 55 by vapor deposition or the like. The material which comprises the counter electrode conductive layer 56 will not be specifically limited if it can generally be used for a solar cell. Such materials include indium tin composite oxide (ITO), metal oxides such as fluorine doped tin oxide (FTO), zinc oxide (ZnO), titanium, tungsten, gold, silver, copper, nickel, etc. A metal material is mentioned. Considering the film strength, titanium is preferable.

(Sealing material 57)
The sealing material 57 prevents volatilization of the electrolytic solution and intrusion of water or the like into the battery (cell). Further, the sealing material 57 absorbs fallen objects and stresses (impacts) acting on the translucent substrate 50, and deflections acting on the translucent substrate 50 during long-term use.

  The material which comprises the sealing material 57 will not be specifically limited if it can be generally used for a solar cell. As such a material, for example, a silicone resin, an epoxy resin, a polyisobutylene resin, a hot melt resin, a glass frit and the like are preferable, and these can be used in two or more layers. When a nitrile solvent or carbonate solvent is used as the solvent for the redox electrolyte, silicone resins, hot melt resins (for example, ionomer resins), polyisobutylene resins, and glass frit are particularly preferable. The sealing material 57 is applied to the transparent conductive layer 51, and the support substrate 59 is bonded to the sealing material 57.

(Carrier transport layer 58)
The carrier transport layer 58 is a conductive material that is capable of transporting ions and is injected between the transparent conductive layer 51 inside the sealing material 57 and the support substrate 59. Such a carrier transport material is composed of a conductive material capable of transporting ions, and examples of suitable materials include a liquid electrolyte, a solid electrolyte, a gel electrolyte, and a molten salt gel electrolyte.

  The liquid electrolyte is not particularly limited as long as it is a liquid substance containing a redox species, and can generally be used in a battery or a solar battery. Specifically, those comprising a redox species and a solvent capable of dissolving the same, those comprising a redox species and a molten salt capable of dissolving the same, redox species and a solvent and molten salt capable of dissolving the same. The thing which consists of is mentioned.

Examples of the redox species include I ⁻ / I ³⁻ series, Br ²⁻ / Br ³⁻ series, Fe ²⁺ / Fe ³⁺ series, and quinone / hydroquinone series.

  Examples of the solvent for the redox species include carbonate compounds such as propylene carbonate, nitrile compounds such as acetonitrile, alcohols such as ethanol, water, and aprotic polar substances. Among these, carbonate compounds and nitrile compounds are particularly preferable. Two or more of these solvents can be used in combination.

  The solid electrolyte is a conductive material that can transport electrons, holes, and ions, and can be used as an electrolyte of a solar cell and has no fluidity. Specifically, hole transport materials such as polycarbazole, electron transport materials such as tetranitrofluororenone, conductive polymers such as polyroll, polymer electrolytes obtained by solidifying liquid electrolytes with polymer compounds, copper iodide, thiocyanate Examples thereof include a p-type semiconductor such as copper acid, and an electrolyte obtained by solidifying a liquid electrolyte containing a molten salt with fine particles.

  The gel electrolyte is usually composed of an electrolyte and a gelling agent. Examples of gelling agents include polymer gelation such as crosslinked polyacrylic resin derivatives, crosslinked polyacrylonitrile derivatives, polyalkylene oxide derivatives, silicone resins, and polymers having a nitrogen-containing heterocyclic quaternary compound salt structure in the side chain. Agents and the like.

  The molten salt gel electrolyte is usually composed of the gel electrolyte as described above and a room temperature molten salt. Examples of the room temperature molten salt include nitrogen-containing heterocyclic quaternary ammonium salt compounds such as pyridinium salts and imidazolium salts.

  You may add an additive to electrolyte as needed. Examples of such additives include nitrogen-containing aromatic compounds such as t-butylpyridine (TBP), dimethylpropylimidazole iodide (DMPII), methylpropylimidazole iodide (MPII), ethylmethylimidazole iodide (EMII), Examples include imidazole salts such as ethylimidazole iodide (EII) and hexylmethylimidazole iodide (HMII).

(Support substrate 59)
The support substrate 59 prevents volatilization of the carrier transport material and intrusion of water or the like into the battery (cell). The material which comprises the support substrate 59 will not be specifically limited if it can be generally used for a solar cell. Examples of such materials include soda lime glass, lead glass, fused silica glass, and crystal quartz glass. An injection port (not shown) is formed in the support substrate 59, and a carrier transport material can be injected from this injection port.

  In addition, in this embodiment, although the solar cell modules 3a-3d are the structures in which four dye-sensitized solar cells 5 were formed, the kind and number of cells are not limited. For example, in the solar battery modules 3a to 3d, instead of the dye-sensitized solar battery cell 5, a silicone single crystal cell, a silicone polycrystalline cell, an amorphous silicone cell, a compound semiconductor cell (GaAs-based, InGaAs-based, CIS (Cu In Se Or the like), or a structure in which one or more organic thin-film solar cells are formed.

(Positive electrode 60 / negative electrode 61)
The positive electrode 60 and the negative electrode 61 are current collecting electrodes for collecting the output from the dye-sensitized solar cell 5. The positive electrode 60 and the negative electrode 61 are respectively extended on the transparent conductive layer 51 outside the sealing material 57 of the solar cell module 3a in a direction orthogonal to the arrangement direction of the solar cell modules 3a to 3d. In other words, the positive electrode 60 and the negative electrode 61 are the positive electrode 60 along one side on the upstream side in the arrangement direction among the two sides of the solar cell module 3a substantially orthogonal to the arrangement direction of the solar cell modules 3a to 3d. Is extended, and the negative electrode 61 is extended along one side on the downstream side in the arrangement direction.

<Connection jig 4>
The connecting jig 4 fixes the plurality of solar cell modules 3a to 3d while being electrically connected. The connection jig 4 is not only electrically connected between adjacent solar cell modules among the solar cell modules 3a to 3d by combining a plurality of types of jigs having different shapes and / or conductivity. It enables electrical connection between solar cell modules that do not.

  FIG. 4 is a conceptual diagram for explaining the electrical connection relationship of the solar cell modules 3a to 3d shown in FIG. As shown in FIG. 4, in the solar power generation unit 1, among the solar cell modules 3a to 3d, the solar cell module 3a and the solar cell module 3b are connected in parallel, and the negative electrodes of the solar cell module 3a and the solar cell module 3b are connected. The solar cell module 3c and the solar cell module 3d are connected in series on the 61 side.

  In order to enable such electrical connection, the connecting jig 4 is disposed in contact with the positive electrode 60 and the negative electrode 61 provided on the back surface 31 of the solar cell modules 3a to 3d, and the solar cell. Back surface jig 41 that engages with the end of module 3, light receiving surface jig 42 that is disposed on light receiving surface 32 of solar cell modules 3a to 3d and extends in the arrangement direction of solar cell modules 3a to 3d, and back surface jig 41 and a light receiving surface jig 42 are fixed to the frame portion 2.

(Back jig 41)
The back surface jig 41 is disposed in contact with the positive electrode 60 and the negative electrode 61 of the solar cell modules 3a to 3d, and ends of the solar cell modules 3a to 3d (in the arrangement direction of the solar cell modules 3a to 3d). It is a jig engaged with the opposite ends of the solar cell module 3 facing each other.

  FIG. 5A to FIG. 5D are schematic views showing an example of the back surface jig 41, with the upper part being a plan view and the lower part being a cross-sectional view.

  As shown in FIG. 5A to FIG. 5D, the connection jig 4 is a conductive back surface jig (conductive back surface jig) 41a and 41b as the back surface jig 41. And non-conductive insulating back surface jigs (insulating back surface jigs) 41c and 41d.

  The conductive back surface jigs 41a and 41b having conductivity electrically connect the positive electrode 60 and the negative electrode 61 to conductive light receiving surface jigs 42a to 42c described later. The conductive back jigs 41 a and 41 b are used to electrically connect the solar cell modules 3 a to 3 d and fix the solar cell modules 3 a to 3 d to the frame portion 2. On the other hand, the insulating back surface jigs 41 c and 41 d having no conductivity are used for fixing the solar cell modules 3 a to 3 d to the frame portion 2.

  The conductive back surface jigs 41a and 41b and the insulating back surface jigs 41c and 41d have shapes that can be engaged with the positive electrode 60 or the negative electrode 61 and the ends of the solar cell modules 3a to 3d. Thereby, the edge part of the solar cell module 3 is latched to the frame part 2.

  The conductive back surface jig 41a and the insulating back surface jig 41c have the same shape and differ only in the presence or absence of conductivity. Similarly, the conductive back jig 41b and the insulating back jig 41d have the same shape and differ only in the presence or absence of conductivity.

  The conductive back jigs 41a and 41b and the insulating back jigs 41c and 41d have one through hole 4a into which the fixing jig 43 can be inserted.

  In addition, the shape of the back surface jig | tool 41 is not limited to the above-mentioned thing, According to the shape etc. of the solar cell modules 3a-3d, the frame part 2, and the light-receiving surface jig | tool 42, it can change suitably.

(Light receiving surface jig 42)
The light receiving surface jig 42 is a jig disposed (extended) on the light receiving surfaces 32 of the solar cell modules 3a to 3d so as to extend substantially parallel to the arrangement direction of the solar cell modules 3a to 3d.

  6A to 6G are schematic views illustrating an example of the light-receiving surface jig 42, where the upper stage is a plan view and the lower stage is a cross-sectional view.

  As shown in FIGS. 6A to 6G, the connecting jig 4 is a conductive light-receiving surface jig (conductive light-receiving surface jig) having conductivity as the light-receiving surface jig 42. 42a to 42c and insulating light receiving surface jigs (insulating light receiving surface jigs) 42d to 42g having no conductivity.

  The conductive light-receiving surface jigs 42 a to 42 c having conductivity are used for electrically connecting the solar cell modules 3 a to 3 d and fixing the solar cell modules 3 a to 3 d to the frame portion 2. On the other hand, the insulating light receiving surface jigs 42d to 42g having no conductivity are used for fixing the solar cell modules 3a to 3d to the frame portion 2.

  The conductive light receiving surface jig 42c and the insulating light receiving surface jig 42d have the same shape and differ only in the presence or absence of conductivity. Similarly, the conductive light receiving surface jig 42b and the insulating light receiving surface jig 42e have the same shape and differ only in the presence or absence of conductivity.

  One or two through holes 4a into which the fixing jig 43 can be inserted are formed in the conductive light-receiving surface jigs 42a to 42c and the insulating light-receiving surface jigs 42d to 42f.

  The shape of the light receiving surface jig 42 is not limited to the above-described one, and can be appropriately changed according to the shapes of the solar cell modules 3a to 3d, the frame portion 2, and the back surface jig 41.

(Fixing jig 43)
The fixing jig 43 fixes the back surface jig 41 and the light receiving surface jig 42 to the frame portion 2. The fixing jig 43 is inserted into the through hole 4 a formed in the back surface jig 41 and the light receiving surface jig 42 and fastened to the frame body 21. Thereby, the back jig 41 and the light receiving surface jig 42 are fixed to the frame main body 21 (frame part 2) by the fixing jig 43.

  Thus, the connection jig 4 includes the conductive back surface jigs 41a and 41b, the insulating back surface jigs 41c and 41d, the conductive light receiving surface jigs 42a to 42c, and the insulating light receiving surface jigs 42d to 42g. By combining these jigs as necessary, it is possible to freely combine the series-parallel connection between the solar cell modules 3a to 3d.

  FIG. 7 is a bottom view showing a connection state between the solar cell modules 3a to 3d in the photovoltaic power generation unit 1 shown in FIG. 1, and FIG. 8 (a) shows sunlight in the A row shown in FIG. It is sectional drawing of the electric power generation unit 1, (b) of FIG. 8 is sectional drawing of the solar power generation unit 1 in B row shown by FIG. In FIG. 7, the frame portion 2 is omitted.

  As shown in FIG. 7 and FIG. 8, in the solar power generation unit 1, the electrical connection between the solar cell modules 3 a to 3 d is divided into two series of A rows and B rows and connected. That is, the connecting jig 4 is connected to both ends of the positive electrode 60 and the negative electrode 61 extending in a direction orthogonal to the arrangement direction of the solar cell modules 3a to 3d.

  In the photovoltaic power generation unit 1, a conductive back surface jig 41 a, a conductive back surface jig 41 b, and an insulating back surface jig 41 c are used as the back surface jig 41, and a conductive light receiving surface jig is used as the light receiving surface jig 42. 42a and an insulating light receiving surface jig 42f are used.

  Specifically, in row A of the photovoltaic power generation unit 1, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3a and a conductive back surface jig that contacts the negative electrode 61 of the solar cell module 3b. 41a is connected by the electroconductive light-receiving surface jig | tool 42a extended in the light-receiving surface 32 of the solar cell module 3b.

  On the other hand, in row B of the photovoltaic power generation unit 1, a conductive back surface jig 41a that contacts the positive electrode 60 of the solar cell module 3a and a conductive back surface jig 41a that contacts the positive electrode 60 of the solar cell module 3b. These are connected by a conductive light receiving surface jig 42a extending on the light receiving surface 32 of the solar cell module 3a.

  Further, in the B row of the solar power generation unit 1, the negative electrode 61 of the solar cell module 3b and the positive electrode 60 of the solar cell module 3c are connected by the conductive back surface jig 41b.

  Further, in the B row of the solar power generation unit 1, the negative electrode 61 of the solar cell module 3c and the positive electrode 60 of the solar cell module 3d are connected by the conductive back surface jig 41b.

  As described above, in the photovoltaic power generation unit 1, electrical connection between the solar cell modules 3 a to 3 d is performed by combining a plurality of types of back surface jigs 41 and light receiving surface jigs 42 having different shapes and / or conductivity. Is going. Thereby, without using external wiring, the electrical connection between the solar cell modules 3a to 3d shown in FIG. 4, that is, the solar cell module 3a and the solar cell module 3b are connected in parallel, and the solar cell module 3a and An electrical connection in which the solar cell module 3c and the solar cell module 3d are connected in series in this order can be performed on the negative electrode 61 side of the solar cell module 3b.

  9 shows a conductive member 44 for taking out current from the photovoltaic power generation unit 1, FIG. 9A is a plan view of the conductive member 44, and FIG. 9B is a plan view of the conductive member 44. It is sectional drawing.

  For example, a conductive member 44 shown in FIGS. 9A and 9B may be used as a configuration for extracting current from the photovoltaic power generation unit 1. The conductive member 44 is made of a conductive member and has an insertion hole 44a into which the fixing jig 43 can be inserted at one end.

  FIG. 10 is a cross-sectional view showing an example of attachment of the conductive member 44 shown in FIGS. FIG. 10 shows an example in which the conductive member 44 is attached to the conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3d in the B row of the photovoltaic power generation unit 1.

  As shown in FIG. 10, the conductive member 44 is attached so as to contact the conductive back surface jig 41 a that contacts the negative electrode 61 of the solar cell module 3 d. For example, the conductive member 44 is disposed on the conductive back surface jig 41a so that the insertion hole 44a is coaxially positioned with respect to the through hole 4a of the conductive back surface jig 41a. It is fixed to the frame body 21 together with the conductive back surface jig 41a.

<Method for Producing Dye-Sensitized Solar Cell 5>
Next, the manufacturing method of the dye-sensitized solar cell 5 is demonstrated. The dye-sensitized solar cell 5 can be manufactured, for example, by the following method.

  First, the transparent conductive layer 51 is formed on the translucent substrate 50, and a transparent electrode substrate is produced. The method for producing the transparent electrode substrate by forming the transparent conductive layer 51 on the translucent substrate 50 is not particularly limited, and examples thereof include a known spray method and sputtering method. A commercially available glass substrate with a transparent conductive layer may be used as the transparent electrode substrate.

  Next, a separation line 52 is formed at a predetermined position with respect to the transparent conductive layer 51 of the prepared transparent electrode substrate by a laser scribing method or the like.

  Next, the material of the photoelectric conversion layer 53 is laminated on the transparent conductive layer 51. A method for laminating the material of the film-like photoelectric conversion layer 53 on the transparent conductive layer 51 is not particularly limited, and a known method may be mentioned. For example, the method of baking after apply | coating the paste containing a semiconductor particle on the transparent conductive layer 51 by the screen printing method, the inkjet method, etc. is mentioned.

  Here, a method for forming the photoelectric conversion layer 53 using titanium oxide will be specifically described.

  First, 125 mL of titanium isopropoxide (manufactured by Kishida Chemical Co., Ltd.) was dropped into 750 mL of a 0.1M nitric acid aqueous solution (manufactured by Kishida Chemical Co., Ltd.), which is a pH adjuster. As a result, the hydrolysis reaction of titanium isopropoxide proceeds to prepare a sol solution. Thereafter, the obtained sol solution was heated in a titanium autoclave at 230 ° C. for 11 hours to grow titanium oxide particles and subjected to ultrasonic dispersion for 30 minutes, whereby an average particle size (average primary particle size) of 15 nm was obtained. A colloidal solution containing titanium oxide particles is prepared. Subsequently, a 2-fold volume of ethanol is added to the obtained colloidal solution, and this is centrifuged at a rotational speed of 5000 rpm to obtain titanium oxide particles. Next, after washing the obtained titanium oxide particles, a solution obtained by dissolving ethyl cellulose and terpineol in absolute ethanol is added and stirred to disperse the titanium oxide particles. Thereafter, the mixed solution is heated under vacuum to evaporate ethanol to obtain a titanium oxide paste. As the final composition, for example, the titanium oxide solid concentration is adjusted to 20 wt%, ethyl cellulose 10 wt%, and terpineol 64 wt%. Solvents used to prepare paste containing semiconductor particles (suspended) include, in addition to the above, glyme solvents such as ethylene glycol monomethyl ether, alcohol solvents such as isopropyl alcohol, and mixtures such as isopropyl alcohol / toluene. A solvent, water, etc. are mentioned. Next, a paste containing semiconductor particles is applied onto the transparent conductive layer 51 by the above method and fired to obtain a porous semiconductor layer. For drying and firing, it is necessary to appropriately adjust conditions such as temperature, time, and atmosphere depending on the type of support and semiconductor particles used. Firing can be performed, for example, in the range of about 50 to 800 ° C. for about 10 seconds to 12 hours in an air atmosphere or an inert gas atmosphere. This drying and baking can be performed once at a single temperature or twice or more at different temperatures.

  Next, a film-like porous insulating layer 54 is formed on the photoelectric conversion layer 53 thus formed. A method for forming the porous insulating layer 54 is not particularly limited, and a known method may be used. For example, the method of baking after apply | coating the paste containing a semiconductor particle on the photoelectric converting layer 53 by the screen printing method, the inkjet method, etc. is mentioned.

  Next, the catalyst layer 55 and the counter electrode conductive layer 56 are formed by sputtering or the like. Examples of the method for forming the catalyst layer 55 include known formation methods such as screen printing, vapor deposition, and CVD. Examples of the method for forming the counter electrode conductive layer 56 include a vapor deposition method and a printing method.

  Next, a dye is adsorbed on the photoelectric conversion layer 53. Examples of the method of adsorbing the dye on the photoelectric conversion layer 53 include a method of immersing the photoelectric conversion layer 53 formed on the transparent conductive layer 51 in a solution (dye adsorption solution) in which the dye is dissolved. Thereby, the photoelectric conversion layer 53 in which the dye is adsorbed is formed.

  Next, the sealing material 57 is apply | coated around the laminated body formed on the transparent conductive layer 51, and the support substrate 59 is bonded together.

  Finally, a carrier transport material is injected from an injection port provided in advance in the support substrate 59 by a vacuum injection method or the like, and the injection port is sealed using an ultraviolet curable resin or the like. Thereby, the dye-sensitized solar cell 5 filled with the carrier transport material can be manufactured.

<Assembly method of solar power generation unit 1>
(A) of FIG. 11 is a bottom view for explaining an assembling method of the photovoltaic power generation unit 1, and (b) of FIG. 11 is a pp ′ end view of (a) of FIG. FIG. 11 (c) is a qq ′ end view of FIG. 11 (a). 11B and 11C also show a cross-sectional view of the bottom surface cover portion 23 that covers the bottom surface of the frame portion 2.

  As shown to (a)-(c) of FIG. 11, the frame main body 21 has the two inner wall parts 24 extended | stretched mutually parallel along the sequence direction of solar cell module 3a-3d. The space | interval of the inner wall part 24 is set to the width | variety (namely, length of the direction orthogonal to the sequence direction of solar cell module 3a-3d) of solar cell module 3a-3d.

  The frame body 21 has a guide portion 25 that extends between the inner wall portions 24 in the arrangement direction of the solar cell modules 3 a to 3 d and defines the arrangement positions of the solar cell modules 3 a to 3 d and the connection jig 4. ing.

[Guide part 25]
The guide part 25 prescribes | regulates the arrangement position of the solar cell modules 3a-3d and the connection jig 4. As shown in FIG. The guide part 25 extends inside the frame body 21 in the arrangement direction of the solar cell modules 3a to 3d. Moreover, the guide part 25 is formed so that the solar cell modules 3a to 3d and the connection jig 4 can be inserted from one end (one end where the frame body 21 is opened), and the inserted solar cell modules 3a to 3d and the connection jig are connected. The tool 4 is guided to a predetermined arrangement position.

  The guide portion 25 includes a back surface side guide member 26, a light receiving surface side guide member 27, and a guide groove 28.

(Back side guide member 26)
The back surface side guide member 26 supports the solar cell modules 3 a to 3 d inserted into the frame body 21 from the back surface 31 side. The two back surface side guide members 26 are provided substantially parallel to each other in the in-plane direction of the frame body 21 along the arrangement direction of the solar cell modules 3a to 3d.

  Each back surface side guide member 26 corresponds to the width of the back surface jig 41 from the inner wall portion 24 so that the back surface jig 41 can be inserted between the back surface side guide member 26 and the inner wall portion 24 on the adjacent side. It is provided at intervals. Moreover, each back surface side guide member 26 is provided mutually spaced apart so that the dye-sensitized solar cell 5 of solar cell module 3a-3d can be inserted between this back surface side guide member 26. FIG.

(Light receiving surface side guide member 27)
The light receiving surface side guide member 27 supports the solar cell modules 3a to 3d inserted in the frame body 21 from the light receiving surface 32 side. The two light receiving surface side guide members 27 are provided substantially parallel to each other in the in-plane direction of the frame body 21 along the arrangement direction of the solar cell modules 3a to 3d.

  Each light receiving surface side guide member 27 is provided to face each back surface side guide member 26, and the solar cell modules 3 a to 3 d are provided between the back surface side guide member 26 and the light receiving surface side guide member 27 facing each other. It is pinched. Further, each light receiving surface side guide member 27 is arranged so that the light receiving surface jig 42 can be inserted between the light receiving surface side guide member 27 and the inner wall portion 24 on the adjacent side. 42 is provided with an interval corresponding to the width of 42.

(Guide groove 28)
The guide groove 28 is a recess for inserting the light receiving surface jig 42 that extends in the arrangement direction of the solar cell modules 3a to 3d and is provided substantially parallel to each other. The guide groove 28 is provided so as to connect between the light receiving surface side guide member 27 and the inner wall portion 24 of the frame main body 21 facing the light receiving surface side guide member 27. The width of the guide groove 28 is set according to the width of the light receiving surface jig 42 so that the light receiving surface jig 42 can be inserted.

  The assembly of the solar power generation unit 1 is performed by sequentially inserting the solar cell modules 3a to 3d and the connection jig 4 from one end of the guide portion 25 (insertion step). First, the insulating back surface jig 41c and the insulating light receiving surface jig 42f are inserted into the A row of the frame body 21 from one end of the guide portion 25, and the conductive back surface jig 41a and the conductive back surface jig 41a are inserted into the B row of the frame body 21. The photosensitive light receiving surface jig 42a is inserted from one end of the guide portion 25 and moved to a predetermined arrangement position.

  Next, the solar cell module 3a is inserted from one end of the guide portion 25 so that the positive electrode 60 of the solar cell module 3a is in contact with the A-side insulating back surface jig 41c and the B-side conductive back surface jig 41a. To place.

  12 (a) is a bottom view showing a state in which the solar cell module 3a is inserted into the frame body 21, and FIG. 12 (b) is an end view taken along line rr ′ shown in FIG. 12 (a). It is.

  As shown in FIGS. 12A and 12B, the solar cell module 3 a inserted into the frame body 21 has the back surface 31 supported by the back surface side guide member 26, and the light receiving surface 32 by the light receiving surface side guide member 27. Is supported, and two side surfaces (side surfaces facing in a direction orthogonal to the arrangement direction of the solar cell modules 3a to 3d) are supported by the inner wall portion 24.

  In this way, the solar cell modules 3a to 3d and the connecting jig 4 are sequentially inserted from one end of the guide portion 25, whereby the inserted solar cell modules 3a to 3d and the connecting jig 4 are guided to a predetermined arrangement position. Thus, the solar cell modules 3a to 3d can be electrically connected (connection process). Therefore, the alignment operation | work at the time of installing the solar cell modules 3a-3d and the connection jig 4 in the flame | frame main body 21 can be reduced significantly.

  FIG. 13 is a bottom view showing the assembled photovoltaic power generation unit 1. As shown in FIG. 13, the solar cell modules 3 a to 3 d and the connection jig 4 arranged at predetermined arrangement positions are fixed to the frame body 21 by the fixing jig 43. And the solar power generation unit 1 can be assembled by obstruct | occluding the open end of the frame main body 21 with the side wall board 22. FIG.

<Effect of photovoltaic power generation unit 1>
As described above, the solar power generation unit 1 of the present embodiment includes a plurality of solar cells in which the positive electrode 60 and the negative electrode 61 are provided on the back surface 31 that is the surface opposite to the light receiving surface 32 that receives sunlight. Modules 3a to 3d, a frame portion 2 to which the solar cell modules 3a to 3d are attached, and a connection jig 4 that is fixed to the frame portion 2 while electrically connecting the solar cell modules 3a to 3d.

  The connecting jig 4 is disposed at the end of the solar cell modules 3a to 3d and the conductive light receiving surface jigs 42a to 42c disposed on the light receiving surface 32 so as to extend in the arrangement direction of the solar cell modules 3a to 3d. And at least conductive back surface jigs 41a and 41b for electrically connecting the positive electrode 60 and the negative electrode 61 and the conductive light receiving surface jig 42a. The conductive back surface jigs 41a and 41b are electrically conductive light receiving surfaces. By being connected to the jigs 42a to 42c, the positive electrodes 60 and the negative electrodes 61 of the plurality of solar cell modules 3a to 3d are electrically connected.

  Therefore, the positive electrode 60 and the negative electrode 61 of any of the solar cell modules 3a to 3d can be electrically connected by combining the conductive back surface jigs 41a and 41b and the conductive light receiving surface jigs 42a to 42c. Therefore, not only electrical connection between adjacent solar cell modules but also electrical connection between non-adjacent solar cell modules is possible.

  Therefore, according to the present embodiment, it is possible to realize the photovoltaic power generation unit 1 that enables series-parallel connection between non-adjacent solar cell modules without using external wiring.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 14 is a bottom view showing the appearance of the photovoltaic power generation unit 11 of the present embodiment, and FIG. 15 is a conceptual diagram for explaining the electrical connection relationship of the solar cell modules 3a to 3d shown in FIG. It is.

  As shown in FIGS. 14 and 15, in the solar power generation unit 11, among the four solar cell modules 3 a to 3 d arranged in one direction, the solar cell module 3 a and the solar cell module 3 c are connected in series. Moreover, the solar cell module 3b and the solar cell module 3d are connected in series. Furthermore, the solar cell modules 3a and 3c connected in series and the solar cell modules 3b and 3d connected in series are connected in parallel.

  16 is a bottom view showing a connection state between the solar cell modules 3a to 3d in the photovoltaic power generation unit 11 shown in FIG. 14, and FIG. 17 (a) shows the sunlight in the A row shown in FIG. It is sectional drawing of the electric power generation unit 11, (b) of FIG. 17 is sectional drawing of the solar power generation unit 11 in the B row | line | column shown by FIG. In FIG. 16, the frame unit 2 is omitted.

  In order to realize the electrical connection between the solar cell modules 3a to 3d as shown in FIG. 15, in the photovoltaic power generation unit 11, as shown in FIG. 16 and FIG. The tool 41a and the insulating back surface jig 41c are used. As the light receiving surface jig 42, the conductive light receiving surface jig 42a, the insulating light receiving surface jig 42f, and the insulating light receiving surface jig 42g are used.

  Specifically, in row A of the photovoltaic power generation unit 11, a conductive back surface jig 41a that contacts the positive electrode 60 of the solar cell module 3a and a conductive back surface jig that contacts the positive electrode 60 of the solar cell module 3b. 41a is connected by the electroconductive light-receiving surface jig | tool 42a extended in the light-receiving surface 32 of the solar cell module 3a.

  Further, in the A row of the photovoltaic power generation unit 11, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3b and a conductive back surface jig 41a that contacts the positive electrode 60 of the solar cell module 3d are provided. These are connected by a conductive light receiving surface jig 42a extending on the light receiving surface 32 of the solar cell module 3c.

  On the other hand, in row B of the photovoltaic power generation unit 11, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3a and a conductive back surface jig 41a that contacts the positive electrode 60 of the solar cell module 3c. These are connected by a conductive light receiving surface jig 42a extending on the light receiving surface 32 of the solar cell module 3b.

  Further, in row B of the photovoltaic power generation unit 11, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3c and a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3d. These are connected by a conductive light receiving surface jig 42a extending on the light receiving surface 32 of the solar cell module 3d.

  Thus, the electrical connection between the solar cell modules 3a to 3d shown in FIG. 15 is realized by combining a plurality of types of back surface jigs 41 and light receiving surface jigs 42 having different shapes and / or conductivity. be able to. Further, the connection jig 4 can realize not only electrical connection between adjacent solar cell modules but also electrical connection between non-adjacent solar cell modules.

[Embodiment 3]
The following will describe another embodiment of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 18 is a bottom view showing the appearance of the photovoltaic power generation unit 12 of the present embodiment, and FIG. 19 is a conceptual diagram for explaining the electrical connection relationship of the solar cell modules 3a to 3e shown in FIG. It is.

  As shown in FIGS. 18 and 19, in the solar power generation unit 12, among the five solar cell modules 3a to 3e arranged in one direction, the solar cell module 3a, the solar cell module 3c, and the solar cell module 3e. Are connected in series. Moreover, the solar cell module 3b and the solar cell module 3d are connected in series. Furthermore, the solar cell modules 3a, 3c and 3e connected in series and the solar cell modules 3b and 3d connected in series are connected in parallel.

  20 is a bottom view showing a connection state between the solar cell modules 3a to 3e in the photovoltaic power generation unit 12 shown in FIG. 18, and FIG. 21 (a) shows the sunlight in the A row shown in FIG. It is sectional drawing of the electric power generation unit 12, (b) of FIG. 21 is sectional drawing of the solar power generation unit 12 in the B row | line | column shown by FIG. In FIG. 20, the frame unit 2 is omitted.

  In order to realize the electrical connection between the solar cell modules 3a to 3e as shown in FIG. 19, in the photovoltaic power generation unit 12, as shown in FIG. 20 and FIG. The tool 41a and the insulating back surface jig 41c are used. As the light receiving surface jig 42, the conductive light receiving surface jig 42a, the insulating light receiving surface jig 42f, and the insulating light receiving surface jig 42g are used.

  Specifically, in row A of the photovoltaic power generation unit 12, a conductive back jig 41a that contacts the positive electrode 60 of the solar cell module 3a and a conductive back jig that contacts the positive electrode 60 of the solar cell module 3b. 41a is connected by the electroconductive light-receiving surface jig | tool 42a extended in the light-receiving surface 32 of the solar cell module 3a.

  Further, in the A row of the photovoltaic power generation unit 12, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3b and a conductive back surface jig 41a that contacts the positive electrode 60 of the solar cell module 3d. These are connected by a conductive light receiving surface jig 42a extending on the light receiving surface 32 of the solar cell module 3c.

  Furthermore, in row A of the photovoltaic power generation unit 12, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3d and a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3e. These are connected by a conductive light receiving surface jig 42a extending on the light receiving surface 32 of the solar cell module 3e.

  On the other hand, in row B of the photovoltaic power generation unit 12, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3a and a conductive back surface jig 41a that contacts the positive electrode 60 of the solar cell module 3c. These are connected by a conductive light receiving surface jig 42a extending on the light receiving surface 32 of the solar cell module 3b.

  Further, in row B of the photovoltaic power generation unit 12, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3c and a conductive back surface jig 41a that contacts the positive electrode 60 of the solar cell module 3e are provided. These are connected by a conductive light receiving surface jig 42a extending on the light receiving surface 32 of the solar cell module 3d.

  Thus, the electrical connection between the solar cell modules 3a to 3e shown in FIG. 19 is realized by combining a plurality of types of back surface jigs 41 and light receiving surface jigs 42 having different shapes and / or conductivity. be able to.

[Embodiment 4]
The following will describe another embodiment of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 22 is a bottom view showing the appearance of the solar power generation unit 13 of the present embodiment, and FIG. 23 is a conceptual diagram for explaining the electrical connection relationship of the solar cell modules 3a to 3c shown in FIG. It is.

  As shown in FIGS. 22 and 23, in the solar power generation unit 13, each of the three solar cell modules 3 a to 3 c arranged in one direction is connected in parallel.

  24 is a bottom view showing a connection state between the solar cell modules 3a to 3c in the photovoltaic power generation unit 13 shown in FIG. 22, and FIG. 25 (a) shows the sunlight in the A row shown in FIG. It is sectional drawing of the electric power generation unit 13, (b) of FIG. 25 is sectional drawing of the solar power generation unit 13 in the B row shown by FIG. In FIG. 24, the frame unit 2 is omitted.

  In order to realize the electrical connection between the solar cell modules 3a to 3c as shown in FIG. 23, in the photovoltaic power generation unit 13, as shown in FIGS. The tool 41a and the insulating back surface jig 41c are used. As the light receiving surface jig 42, the conductive light receiving surface jig 42b, the conductive light receiving surface jig 42c, and the insulating light receiving surface jig 42e are used.

  Specifically, in row A of the photovoltaic power generation unit 13, a conductive back surface jig 41a that contacts the positive electrode 60 of the solar cell module 3a and a conductive back surface jig that contacts the positive electrode 60 of the solar cell module 3b. 41a and a conductive back surface jig 41a that contacts the positive electrode 60 of the solar cell module 3c, a conductive light receiving surface jig 42b that extends on the light receiving surface 32 of the solar cell module 3a, and a solar cell module 3b The conductive light receiving surface jig 42c extending on the light receiving surface 32 is connected.

  On the other hand, in row B of the photovoltaic power generation unit 13, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3a, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3b, The conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3c, the conductive light receiving surface jig 42c extending from the light receiving surface 32 of the solar cell module 3b, and the light receiving surface 32 of the solar cell module 3c. Are connected by a conductive light receiving surface jig 42b.

  Thus, the electrical connection between the solar cell modules 3a to 3c shown in FIG. 23 is realized by combining a plurality of types of back surface jigs 41 and light receiving surface jigs 42 having different shapes and / or conductivity. be able to.

  FIG. 26 is an enlarged view showing the inside of a broken line frame shown in FIG. As shown in FIG. 26, the conductive light-receiving surface jig 42b and the conductive light-receiving surface jig 42c are formed with a small connecting portion so as to engage with each other. In other words, in the conductive light-receiving surface jig 42b and the conductive light-receiving surface jig 42c, the thicknesses of the portions that are in contact with each other are smaller than the thickness of the portions that are not in contact.

  The thickness of the conductive light receiving surface jig 42b and the conductive light receiving surface jig 42c is (a), and the thickness of the connecting portion of the conductive light receiving surface jig 42b to the conductive light receiving surface jig 42c is (b). When the thickness of the connecting portion of the light receiving surface jig 42c with the conductive light receiving surface jig 42b is (c), (a), (b), and (c) are (a)> (b), (a)> (C), (a) = (b) + (c), preferably (b) = (c) = (a) / 2.

  By setting the thickness to (b) = (c) = (a) / 2, when the conductive light-receiving surface jig 42b and the conductive light-receiving surface jig 42c are turned upside down, the same shape is shared. Can be used.

[Embodiment 5]
The following will describe another embodiment of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 27 is a bottom view showing the appearance of the solar power generation unit 14 of the present embodiment, and FIG. 28 is a conceptual diagram for explaining the electrical connection relationship of the solar cell modules 3a to 3d shown in FIG. It is.

  As shown in FIGS. 27 and 28, in the solar power generation unit 14, each of the four solar cell modules 3a to 3d arranged in one direction is connected in parallel.

  29 is a bottom view showing a connection state between the solar cell modules 3a to 3d in the photovoltaic power generation unit 14 shown in FIG. 27, and FIG. 30 (a) shows the sunlight in the A row shown in FIG. It is sectional drawing of the electric power generation unit 14, (b) of FIG. 30 is sectional drawing of the solar power generation unit 14 in B row shown by FIG. In FIG. 29, the frame unit 2 is omitted.

  In order to realize the electrical connection between the solar cell modules 3a to 3d as shown in FIG. 28, in the photovoltaic power generation unit 14, as shown in FIG. 29 and FIG. The tool 41a and the insulating back surface jig 41c are used. As the light receiving surface jig 42, the conductive light receiving surface jig 42b, the conductive light receiving surface jig 42c, and the insulating light receiving surface jig 42e are used.

  Specifically, in row A of the photovoltaic power generation unit 14, a conductive back jig 41a that contacts the positive electrode 60 of the solar cell module 3a and a conductive back jig that contacts the positive electrode 60 of the solar cell module 3b. 41a, the conductive back surface jig 41a in contact with the positive electrode 60 of the solar cell module 3c, and the conductive back surface jig 41a in contact with the positive electrode 60 of the solar cell module 3d are the light receiving surface 32 of the solar cell module 3a. A conductive light receiving surface jig 42b extending to the light receiving surface 32, a conductive light receiving surface jig 42c extending to the light receiving surface 32 of the solar cell module 3b, and a conductive material extending to the light receiving surface 32 of the solar cell module 3c. The light receiving surface jig 42c is connected.

  On the other hand, in row B of the photovoltaic power generation unit 14, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3a, a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3b, A conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3c and a conductive back surface jig 41a that contacts the negative electrode 61 of the solar cell module 3d extend on the light receiving surface 32 of the solar cell module 3b. Conductive light-receiving surface jig 42c, conductive light-receiving surface jig 42c extended to light-receiving surface 32 of solar cell module 3c, and conductive light-receiving surface extended to light-receiving surface 32 of solar cell module 3d They are connected by a jig 42b.

  Thus, the electrical connection between the solar cell modules 3a to 3d shown in FIG. 28 is realized by combining a plurality of types of back surface jigs 41 and light receiving surface jigs 42 having different shapes and / or conductivity. be able to.

[Summary]
The connection jig according to the first aspect of the present invention electrically connects a plurality of solar cell modules in which electrodes (positive electrode 60 and negative electrode 61) are provided on the back surface that is the surface opposite to the light receiving surface that receives sunlight. A conductive light receiving surface jig (conductive light receiving surface jigs 42a to 42c) disposed on the light receiving surface so as to extend in the arrangement direction of the solar cell modules, A conductive back surface jig (conductive back surface jigs 41a and 41b) disposed at an end of the solar cell module and electrically connecting the electrode and the conductive light receiving surface jig. The conductive back surface jig is connected to the conductive light receiving surface jig, whereby the electrodes of the plurality of solar cell modules are electrically connected.

  In the above configuration, the conductive back surface jig for electrically connecting the conductive light receiving surface jig and the electrode is coupled to the conductive light receiving surface jig, thereby the electrodes of the plurality of solar cell modules. The space is electrically connected.

  Therefore, by combining the conductive back surface jig and the conductive light receiving surface jig, it becomes possible to electrically connect the electrodes of any solar cell module. In addition to the general connection, electrical connection between non-adjacent solar cell modules becomes possible.

  Therefore, according to said structure, the connection jig | tool which enables the series-parallel connection between the solar cell modules which are not adjacent can be implement | achieved, without using external wiring.

  Moreover, the connection jig which concerns on aspect 2 of this invention is the said light receiving surface in the said aspect 1, The insulating light-receiving surface jig extended in the sequence direction of the said solar cell module, The said solar cell module The structure further provided with the insulating back surface jig | tool arrange | positioned at the edge part may be sufficient.

  According to the above configuration, by using a combination of a light receiving surface jig and a back surface jig having conductivity and an insulating light receiving surface jig and a back surface jig having no conductivity, It is possible to freely change the series-parallel connection between the solar cell modules while fixing.

  Moreover, the connection jig which concerns on aspect 3 of this invention is the structure by which the said edge part of the said solar cell module is clamped by the said light-receiving surface jig and the said back surface jig in the said aspect 1 or 2. Also good.

  According to said structure, since the edge part of a solar cell module is clamped by the light-receiving surface jig | tool and a back surface jig | tool, it can fix, fixing a solar cell module electrically by a connection jig | tool. it can.

  A photovoltaic power generation unit according to aspect 4 of the present invention includes a plurality of solar cell modules provided with electrodes on the back surface that is the surface opposite to the light receiving surface that receives sunlight, and a frame to which the solar cell module is attached. And the connection jig according to any one of the above aspects 1 to 3 which is fixed to the frame part while electrically connecting the solar cell module.

  According to said structure, the solar power generation unit in which the series-parallel connection between the solar cell modules which are not adjacent is possible can be implement | achieved, without using external wiring.

  In the photovoltaic power generation unit according to aspect 5 of the present invention, in the aspect 4, the frame part has a guide part extending in the arrangement direction of the solar cell modules inside the frame part, and the guide The part may be configured such that the solar cell module and the connection jig can be inserted from one end, and the inserted solar cell module and the connection jig are guided to a predetermined position.

  In the above configuration, when the solar cell module and the connection jig are attached to the frame, the solar cell module and the connection jig are sequentially inserted from one end of the guide portion to guide the solar cell module and the connection jig to a predetermined position. can do.

  Therefore, according to said structure, the alignment operation | work etc. at the time of attaching a solar cell module and a connection jig to a flame | frame can be reduced significantly.

  A method for assembling a photovoltaic power generation unit according to Aspect 6 of the present invention is a method for assembling the photovoltaic power generation unit according to Aspect 4, wherein the conductive light-receiving surface extends in the arrangement direction of the solar cell modules. A light receiving surface jig arrangement step of arranging a jig on the light receiving surface of the solar cell module; and the conductive back surface jig for electrically connecting the electrode and the conductive light receiving surface jig. A back surface jig arrangement step arranged at the end of the battery module and the conductive back surface jig are connected to the conductive light receiving surface jig to electrically connect the electrodes of the plurality of solar cell modules. And a connecting step.

  According to said method, the solar power generation unit which can perform the serial-parallel connection between the solar cell modules which are not adjacent can be obtained, without using external wiring.

  A method for assembling a photovoltaic power generation unit according to aspect 7 of the present invention is a method for assembling the photovoltaic power generation unit according to aspect 5, wherein the solar cell module and the connection jig are sequentially inserted from one end of the guide portion. And an insertion step of guiding to the predetermined position.

  According to the above method, since the solar cell module and the connecting jig are sequentially inserted from one end of the guide portion, the alignment process when attaching the solar cell module and the connecting jig to the frame is greatly increased. Can be reduced.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used in the field related to a solar power generation unit including a solar cell module, and can be suitably used particularly when a plurality of solar cell modules arranged in a single row direction are connected in series and parallel. .

DESCRIPTION OF SYMBOLS 1,11-14 Photovoltaic power generation unit 2 Frame part 3a-3e Solar cell module 4 Connection jig 21 Frame main body (frame part)
22 Side wall plate (frame part)
25 Guide part 26 Back side guide member (guide part)
27 Light receiving surface side guide member (guide part)
28 Guide groove (guide part)
31 Back surface 32 Light receiving surface 41 Back surface jig (connection jig)
42 Light-receiving surface jig (connection jig)
41a / 41b Conductive back surface jig (connection jig, conductive back surface jig)
41c / 41d Insulating back surface jig (connection jig, insulating back surface jig)
42a to 42c conductive light receiving surface jig (connection jig, conductive light receiving surface jig)
42d to 42g Insulating light receiving surface jig (connection jig, insulating light receiving surface jig)
43 Fixing jig (connection jig)
60 Positive electrode (electrode)
61 Negative electrode (electrode)

Claims (5)

A connecting jig for electrically connecting a plurality of solar cell modules provided with electrodes on the back surface, which is the surface opposite to the light receiving surface that receives sunlight,
A conductive light-receiving surface jig disposed on the light-receiving surface so as to extend in the arrangement direction of the solar cell modules;
A conductive back surface jig disposed at an end of the solar cell module and electrically connecting the electrode and the conductive light receiving surface jig;
The connection jig, wherein the conductive back surface jig is connected to the conductive light receiving surface jig, whereby the electrodes of the plurality of solar cell modules are electrically connected. An insulating light-receiving surface jig disposed on the light-receiving surface and extending in the arrangement direction of the solar cell modules;
The connection jig according to claim 1, further comprising an insulating back surface jig disposed at an end of the solar cell module. The end portion of the solar cell module is sandwiched between the conductive light receiving surface jig or the insulating light receiving surface jig and the conductive back surface jig or the insulating back surface jig. The connection jig according to claim 2. A plurality of solar cell modules in which electrodes are provided on the back surface, which is the surface opposite to the light receiving surface that receives sunlight;
A frame part to which the solar cell module is attached;
A solar power generation unit comprising: the connection jig according to claim 1, wherein the solar cell module is fixed to the frame portion while being electrically connected to the solar cell module. The frame part has a guide part extending in the arrangement direction of the solar cell modules inside the frame part,
The guide portion is formed so that the solar cell module and the connection jig can be inserted from one end, and guides the inserted solar cell module and the connection jig to a predetermined position. Item 5. A photovoltaic power generation unit according to item 4.

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