JP6809954B2 - Solar cell module and manufacturing method of solar cell module - Google Patents

Description

The present invention relates to a solar cell module and a method for manufacturing the solar cell module.

Conventionally, a solar cell module made of a dye-sensitized solar cell is generally configured to include a photoelectrode, a counter electrode, and an electrolytic solution or an electrolytic solution layer, and the photoelectrode includes at least a transparent conductive layer. It is known to have a semiconductor layer and a dye (see, for example, Patent Document 1). In such a solar cell module, for example, when the photoelectrode side is irradiated with light, the dye adsorbed on the semiconductor layer absorbs the light, the electrons in the dye molecule are excited, and the electrons are transferred to the semiconductor. Is done. Then, the electrons generated on the photoelectrode side move to the counter electrode side through the external circuit, and these electrons return to the photoelectrode side through the electrolytic solution. By repeating such a process, electric energy is generated.

Further, as the solar cell module as described above, as shown in FIGS. 6 and 7, two cells C and C are arranged in series in the width direction X2. In this case, a transparent conductive film is formed on the surface of the first base material 3A, and a plurality of band-shaped semiconductor layers in which a dye extending in the longitudinal direction X1 is adsorbed are formed on the surface of the transparent conductive film of the first base material 3A. The light electrode 11 is sealed between the semiconductor layer of the light electrode 11 and the counter electrode 12 with a counter electrode 12 having a counter electrode formed on the surface of the second base material 3B so as to face the light electrode 11. A state in which the stopped electrolytic solution 13 and the electrolytic solution 13 are sealed, and the sealing material 15 for arranging a plurality of cells C divided in the width direction X2 in a plan view and the sealing material 15 are covered. A conductive material 14 that is provided and electrically connects the light electrode 11 and the counter electrode 12 and an insulating line 18 that extends along the width direction X2 with respect to the light electrode 11 and the counter electrode 12 are provided and have a width. There is a configuration in which a plurality of cells C arranged in the direction X2 are electrically connected by series wiring.
In this case, both ends in the width direction X2 are extraction electrodes (+ electrode, − electrode). When the battery is used, the + electrode and the-electrode are opposite to each other, and are separated from each other, which makes it difficult to perform the wiring work. Therefore, one end side of the submodules R and R partitioned by the fusion line 18 is made conductive with each other by a wiring material such as copper tape, and electricity can be taken out at the other end side. There is a structure in which electricity flows in a U shape.

Japanese Patent No. 5702897

However, in the conventional solar cell module having a structure in which electricity flows in a U shape in a plan view, a separate process for providing the wiring material is required in the method of establishing continuity between the submodules using the wiring material. Therefore, a suitable method for efficient wiring is required, and there is room for improvement in that respect.

The present invention has been made in view of the above-mentioned problems, and a solar cell module and a solar cell module that can be efficiently wired by having a structure in which a take-out electrode can be arranged from an end on the same side. It is an object of the present invention to provide a manufacturing method.

In order to achieve the above object, in the solar cell module according to the present invention, a transparent conductive film is formed on the surface of the first substrate and spreads in the first direction on the surface of the transparent conductive film of the first substrate. A first electrode in which a plurality of band-shaped semiconductor layers on which existing dyes are adsorbed are formed, a second electrode in which an opposed conductive film is formed on the surface of the second base material so as to face the first electrode, and the above. The electrolytic solution sealed between the semiconductor layer of the first electrode and the second electrode and the electrolytic solution are sealed and divided into a second direction orthogonal to the first direction in a plan view. A sealing material for arranging a plurality of the cells formed therein, a conductive material provided in a state of being covered with the sealing material and electrically connecting the first electrode and the second electrode, and the first electrode. And an insulating line extending along the second direction with respect to the second electrode, and the plurality of cells arranged in the second direction are electrically connected by series wiring. The conductive material is arranged between the first insulating portion of the first substrate and the second insulating portion of the second substrate arranged between cells adjacent to each other in the second direction, and the conductive material is arranged next to each other. A circuit configuration in which matching cells are connected to each other and the conductive materials on one end side in the second direction of the pair of adjacent submodules divided in the first direction by the insulation line are electrically connected to each other. It is characterized by doing.

In the present invention, a conductive material is arranged between the insulating portion of the first base material and the insulating portion of the second base material arranged between cells adjacent to each other in the second direction of the first base material. Cells adjacent to each other in two directions are electrically connected in series, and conductive materials on one end side in the second direction of a submodule divided in the first direction by an insulating line are electrically connected in series. Has been done. That is, in one submodule, electricity flows from the other end side in the second direction to one end side, and electricity on one end side flows to one end side of the other submodule through the conductive material, and further in the other submodule. It is possible to realize a circuit configuration in which electricity flows from one end side to the other end side in the second direction.
As described above, the solar cell module according to the present invention has a structure in which the submodules on one end side in the second direction are conducted by the conductive material, and electricity flows in a U shape as a whole in a plan view. Therefore, the take-out electrodes (positive electrode, negative electrode) can be arranged on the same side only on the other end side in the second direction, the wiring structure can be simplified, and the wiring work can be easily performed.

Further, in the present embodiment, a simple structure is provided in which a conductive material is provided on one end side of adjacent submodules, and a simple manufacturing method in which the conductive material is line-coated can be applied. It can be easily applied to the two-roll method (hereinafter referred to as RtoR method). Since it can be realized by the manufacturing process in which the conductive material is continuously arranged in the first direction by such an RtoR method, it is not necessary to add a new work process. That is, on one end side in the second direction, there is no need for a wiring material, for example, by attaching a copper tape or soldering along the first direction in the work after manufacturing the battery as in the conventional case. Therefore, it is possible to omit the manufacturing process for providing the wiring material, and it is possible to improve the work efficiency required for manufacturing with a simple configuration.

Moreover, by arranging the conductive material on one end side in the second direction, electricity can flow through both the transparent conductive film on the first base material side and the opposing conductive film on the second base material side. The passage is doubled, the electric resistance is reduced, the current value flowing through these conductive films can be halved or less, and the deterioration of the power generation performance can be suppressed without deteriorating the battery performance.

Further, the solar cell module according to the present invention is a conductive base material from a portion of the first base material and the second base material on which the conductive material is arranged on one end side in the second direction to the one end. It is preferable that the width is 2 mm or more and the width dimension of the conductive material on one end side is 0.5 mm or more.

With such a configuration, the electrical resistance of electricity flowing through both the transparent conductive film on the first base material side and the opposing conductive film on the second base material side can be more reliably reduced, and these conductive films can be made. The flowing current value can be halved or less, and the deterioration of the power generation performance can be suppressed without deteriorating the battery performance.

Further, the method for manufacturing a solar cell module according to the present invention is a method for manufacturing a solar cell module for continuously manufacturing a solar cell module by a roll-to-roll method, and is transparent on the surface of the first base material. A conductive film is formed, and a first electrode is formed on the surface of the transparent conductive film of the first substrate, in which a plurality of band-shaped semiconductor layers in which dyes extending in the longitudinal direction of the first substrate are adsorbed are formed. A step of forming a second electrode having an opposed conductive film formed on the surface of the second base material so as to face the first electrode, and the step of forming the transparent conductive film and the opposed conductive film. A step of performing insulation processing parallel to the longitudinal direction, and a step of providing a sealing material for arranging a plurality of cells in the width direction of the first base material and the second base material orthogonal to the longitudinal direction in a plan view. A step of arranging a conductive material in a region on the transparent conductive film of the first base material where the semiconductor layer is not formed to electrically connect the first electrode and the second electrode, and a step of electrically connecting the first electrode and the first electrode. A step of providing an electrolytic solution between the semiconductor layer and the second electrode, a step of bonding the first electrode and the second electrode, and the width direction with respect to the first electrode and the second electrode. A first insulating line extending along the width direction and not partially insulating the conductive material on one end side in the width direction and a second insulating line extending over the entire width direction are alternately arranged in the longitudinal direction. It has a step of forming and a step of cutting the first electrode and the second electrode at the position of the second insulating line, and the conductive material is arranged on one end side in the width direction. In the solar cell module cut by the second insulation line, the conductive materials on one end side in the width direction of the pair of adjacent submodules divided by the first insulation line are electrically connected to each other. It is a feature.

In the present invention, the conductive material is arranged between the insulating portion of the first base material and the insulating portion of the second base material arranged between the cells adjacent to each other in the width direction of the first base material, and the conductive material is arranged in the width direction. Adjacent cells are electrically connected in series, and the conductive materials on one end side in the width direction of a pair of adjacent submodules divided in the longitudinal direction by the first insulation line are electrically connected in series. The solar cell module having the configuration can be manufactured in a roll-to-roll system in a continuous state in the longitudinal direction. That is, a module having an independent electric circuit in the solar cell module itself cut and divided at the position of the second insulation line can be produced by a roll-to-roll method. In this way, the position and length of the conductive material, the first insulation line, and the second insulation line are appropriately set on the film substrate by the roll-to-roll method, and the wiring is such that the set electrical characteristics (voltage, etc.) are obtained. Since it can be manufactured by applying the above, it is possible to freely design the series connection (circuit design) of cells.

Further, in the present invention, when the manufactured solar cell module is mounted on a separate body (board), it is performed after attaching a plurality of solar cell modules to the board as in the conventional case, and the solar cell modules are electrically connected to each other. Since the wiring work for connecting is not required, the manufacturing efficiency can be improved. In this way, since the work man-hours can be reduced, the manufacturing cost can be reduced.

Further, in the method for manufacturing a solar cell module according to the present invention, the first insulation line and the second insulation line are formed by a fused portion fused along the width direction, or are insulated by an insulating processing means. It is preferable that the insulating processed portion is formed by closing it with a sealing material.

In this case, it is first with respect to the first electrode and the second electrode which are moved by the roll-to-roll method by a manufacturing apparatus equipped with appropriate fusion means and insulation processing means extending along the width direction. A fused portion forming the insulating line and the second insulating line, or a portion in which the insulating processed portion is closed by the sealing material can be easily formed.

According to the solar cell module of the present invention and the method for manufacturing the solar cell module, wiring can be performed efficiently by adopting a structure in which the take-out electrode can be arranged from the end on the same side.

It is a perspective view which shows the structure of the solar cell module by embodiment. It is a top view of the solar cell module shown in FIG. (A) is a sectional view taken along line AA shown in FIG. 2, and (b) is a sectional view taken along line BB shown in FIG. It is a perspective view which shows the whole structure of the manufacturing apparatus of a solar cell module. It is a top view which shows the manufacturing process of the solar cell module by this embodiment. It is a top view which shows the structure of the conventional solar cell module. It is a figure which shows the structure of the conventional solar cell module, and is the cross-sectional view taken along line CC shown in FIG.

Hereinafter, a solar cell module according to an embodiment of the present invention and a method for manufacturing the solar cell module will be described with reference to the drawings. The drawings used in the following description are schematic, and the length, width, thickness ratio, structure, etc. are not necessarily the same as the actual ones and can be changed as appropriate.

As shown in FIGS. 1 and 2, the solar cell module 1 of the present embodiment has a first direction (longitudinal direction X1) manufactured by a roll-to-roll method (hereinafter, referred to as RtoR method) described later. ), A film-type dye-sensitized solar cell that extends for a long time is cut to a predetermined length. The solar cell module 1 has two compartments (submodules R, R) composed of a plurality of cells C arranged in the width direction X2 (second direction) orthogonal to the longitudinal direction X1 in the longitudinal direction X1. It has a battery structure adjacent to the above, and has a structure in which adjacent submodules R and R are electrically connected to each other at one end 1a side in the width direction X2.

In FIGS. 1 and 2, the arrows indicate the flow of electricity, and the symbols + (plus) and − (minus) indicate the positive electrode and the negative electrode, respectively (the same applies to the other figures).
Here, in the solar cell module 1, as described above, the longitudinal direction X1 is defined as the arrangement direction of the pair of submodules R and R, and the width direction X2 is defined as the direction orthogonal to the longitudinal direction X1 in a plan view. Use.

As shown in FIGS. 3A and 3B, the solar cell module 1 of the present embodiment is a dye-sensitized solar having a photoelectrode 11 and a counter electrode 12 provided opposite to the photoelectrode 11. The battery cell (hereinafter, simply referred to as cell C) has a structure interposed between the pair of base materials 3A and 3B. Then, in the solar cell module 1, conductive films 11A and 12A having conductivity on the inner surfaces of the pair of base materials 3A and 3B are formed, and the semiconductor of the photoelectrode 11 is formed on the conductive films 11A and 12A. The layer 11B and the catalyst layer 12B of the counter electrode 12 are electrically connected to be roughly configured.

In the solar cell module 1, as described above, the photoelectrode 11 and the counter electrode 12 are arranged to face each other via the conductive material 14 having a sealing function, and are formed between the first base material 3A and the second base material 3B. A plurality of (here, two) cells C and C are electrically connected in series along the width direction X2.

Specifically, the solar cell module 1 includes a first base material 3A, a second base material 3B, a photoelectrode 11 (first electrode), a counter electrode 12 (second electrode), an electrolytic solution 13, and a conductive material. It includes 14, a sealing material 15, a first insulating portion 16, a second insulating portion 17, and a fusional portion 18 (insulation line).
The photoelectrode 11 includes a transparent conductive film 11A laminated on the first base material 3A and a porous semiconductor layer 11B laminated on the transparent conductive film 11A. The counter electrode 12 includes a counter conductive film 12A laminated on the second base material 3B and a catalyst layer 12B laminated on the counter conductive film 12A.

The materials of the first base material 3A and the second base material 3B are not particularly limited, and examples thereof include insulators such as film-shaped resins, semiconductors, metals, and glass. Examples of the resin include poly (meth) acrylic acid ester, polycarbonate, polyester, polyimide, polystyrene, polyvinyl chloride, and polyamide. From the viewpoint of producing a thin and light flexible solar cell module 1, the base material is preferably made of a transparent resin, and more preferably a polyethylene terephthalate (PET) film or a polyethylene naphthalate (PEN) film. The material of the first base material 3A and the material of the second base material 3B may be different.

In the photoelectrode 11, a transparent conductive film 11A is formed on the surface of the first base material 3A, and a band-shaped semiconductor layer in which a dye extending in the longitudinal direction X1 is adsorbed on the surface of the transparent conductive film 11A of the first base material 3A. A plurality of 11Bs are formed. The counter electrode 12 has a counter conductive film 12A formed so as to face the photoelectrode 11.

The types and materials of the transparent conductive film 11A and the opposed conductive film 12A are not particularly limited, and the conductive films used in known dye-sensitized solar cells can be applied. For example, a thin film composed of a metal oxide can be applied. Can be mentioned. Examples of the above-mentioned metal oxide include tin-doped tin oxide (ITO), fluorine-doped tin oxide (FTO), aluminum-doped zinc oxide (ATO), indium oxide / zinc oxide (IZO), gallium-doped zinc oxide (GZO), and the like. it can.

The semiconductor layer 11B is made of a material capable of receiving electrons from the adsorbed photosensitizing dye, and is usually preferably porous. The material constituting the semiconductor layer 11B is not particularly limited, and known materials of the semiconductor layer 11B can be applied, and examples thereof include metal oxide semiconductors such as titanium oxide, zinc oxide, and tin oxide.
The photosensitizing dye supported on the semiconductor layer 11B is not particularly limited, and examples thereof include known dyes such as organic dyes and metal complex dyes. Examples of the above-mentioned organic pigments include coumarin-based, polyene-based, cyanine-based, hemicyanine-based, and thiophene-based. As the metal complex dye, for example, a ruthenium complex or the like is preferably used.

The material constituting the catalyst layer 12B is not particularly limited, and known materials can be applied, for example, carbons such as platinum and carbon nanotubes, and poly (3,4-ethylenedioxythiophene) -poly (styrene sulfonate). Examples thereof include conductive polymers such as acid) (PEDOT / PSS).

The electrolytic solution 13 is sealed between the semiconductor layer 11B of the photoelectrode 11 and the counter electrode 12. The electrolytic solution 13 is not particularly limited, and an electrolytic solution used in a known dye-sensitized solar cell can be applied. Examples of the electrolytic solution 13 include an electrolytic solution in which iodine and sodium iodide are dissolved in an organic solvent. A known photosensitizer dye (not shown) is adsorbed on the surface of the semiconductor layer 11B with which the electrolytic solution 13 is in contact, including the inside of the porous material.

The sealing material 15 has a configuration in which the electrolytic solution 13 is sealed and a plurality of cells C divided in the width direction X2 are arranged. The sealing material 15 is a non-conductive member capable of adhering the first base material 3A and the second base material 3B facing each other and sealing the cell C formed between the base materials 3A and 3B. If so, there is no particular limitation.

Examples of the material of the sealing material 15 include a hot melt adhesive (thermoplastic resin), a thermosetting resin, an ultraviolet curable resin, and a resin containing an ultraviolet curable resin and a thermosetting resin. Examples thereof include resin materials that have fluidity and are solidified by an appropriate treatment. Examples of the hot melt adhesive include polyolefin resins, polyester resins, polyamide resins and the like. Examples of the thermosetting resin include epoxy resins and benzoxazone resins. Examples of the ultraviolet curable resin include those containing a photopolymerizable monomer such as an acrylic acid ester and a methacrylic acid ester.

The conductive material 14 is provided in a state where both sides in the width direction X2 are covered with the sealing material 15, and is in direct contact with the transparent conductive film 11A of the photoelectrode 11 and the opposing conductive film 12A of the counter electrode 12, and the photoelectrode 11 And the counter electrode 12 are electrically connected.

The conductive material 14 is arranged parallel to each other between the photoelectrode 11 and the counter electrode 12, and is in contact with the photoelectrode 11 on the first base material 3A and the counter electrode 12 on the second base material 3B. As the conductive material 14, for example, one or more selected from a conducting wire, a conductive tube, a conductive foil, a conductive plate and a conductive mesh, and a conductive paste are used. Here, the conductive paste is a conductive material having a relatively low rigidity and a soft form. For example, the conductive paste may have a form in which a solid conductive material is dispersed in a viscous dispersion medium such as an organic solvent or a binder resin.

Examples of the conductive material used for the conductive material 14 include metals such as gold, silver, copper, chromium, titanium, platinum, nickel, tungsten, iron and aluminum, and alloys of two or more of these metals. However, it is not particularly limited. Further, a resin composition such as polyurethane or polytetrafluoroethylene (PTFE) in which conductive fine particles (for example, fine particles of the metal or alloy, fine particles of carbon black, etc.) are dispersed can also be mentioned as the material.

Encapsulants 15 and 15 are arranged on both sides of the conductive material 14 in the width direction X2. The conductive material 14 and the sealing material 15 adhere between the photoelectrode 11 and the counter electrode 12. Further, as shown in FIGS. 1 and 2, the solar cell module 1 has a fused portion 18 (insulation) extending along the width direction X2 so as to define a pair of submodules R and R in the longitudinal direction X1. Line) is formed. The fused portion 18 is formed by insulating and adhering by means such as ultrasonic fusion (see the ultrasonic fused portion 46 shown in FIG. 4).
In this way, in the cell C each having the semiconductor layer 11B, the electrolytic solution 13 is liquid-tightly sealed in the gap in the thickness direction formed between the photoelectrode 11 and the counter electrode 12 by the conductive material 14. It is formed in a state of being.

A plurality of patterning portions (for example, a cutting device equipped with a cutting tool, a laser irradiation device, a chemical insulation treatment using an etching material, or the like) are provided at predetermined locations of the transparent conductive film 11A and the counter conductive film 12A. Insulating portions 16 and 17) are provided. That is, as shown in FIGS. 3 (a) and 3 (b), the first insulating portion 16 extends in the longitudinal direction X1 by the above-mentioned insulating treatment at a position in contact with the predetermined sealing material 15 in the transparent conductive film 11A. Is formed. The second insulating portion 17 is formed so as to extend in the longitudinal direction X1 by the above-mentioned insulating treatment at a position in contact with the predetermined sealing material 15 in the opposed conductive film 12A. Then, in the present solar cell module 1, the transparent conductivity between the adjacent first insulating portions 16 and 16 formed on the first base material 3A in one of the cells C and C adjacent to each other in the width direction X2. The film 11A and the opposing conductive film 12A between the adjacent second insulating portions 17 and 17 formed on the second base material 3B in the other cell C are between the one cell C and the other cell C. It is connected to the conductive material 14 arranged in.

Further, the first insulating portion 16 of one of the submodules R and R and the first insulating portion 16 of the other submodule R are patterned at positions deviated from each other in the width direction X2. This also applies to the second insulating portion 17.

As shown in FIGS. 3A and 3B, the transparent conductive film 11A and the opposed conductive film 12A are divided into a plurality of parts by a patterning portion. For example, as shown in FIG. 3A, in the partitioned cell C, the opposing conductive film 12A of one cell C (for example, the first cell of reference numeral C1) and the other cell C adjacent to the first cell C1 ( For example, the transparent conductive film 11A of the second cell of reference numeral C2) is electrically connected by the conductive material 14 (reference numeral 14B), and the first cell C1 and the second cell C2 are connected in series in the width direction X2. Become. That is, in the gap between the first base material 3A and the second base material 3B, from one end 1a to the other end side 1b in the width direction X2 (sealing material 15 / conductive material 14 (communication conductive material 14A)). / Encapsulant 15) / (First cell C1) / (Encapsulant 15 / Conductive material 14 / Encapsulant 15) / (Second cell C2) / (Encapsulant 15) are arranged in this order, and these cells C1 and C2 are arranged in series.

The fused portion 18 extends from the other end 1b toward the one end 1a side in the width direction X2 in each of the submodules R and R, leaving the communicating conductive material 14A on the one end 1a side. That is, the respective photoelectrodes 11 and counter electrodes 12 in the submodules R and R form an electric circuit electrically connected by the communicating conductive material 14A.
Here, among the adjacent submodules R and R, the one in which the other end 1b of the photoelectrode 11 is taken out and used as the electrode (positive electrode) is referred to as the first submodule R1 (FIG. 3A), and the other of the counter electrode 12 The second submodule R2 (FIG. 3B) with the end 1b as the take-out electrode (negative electrode) is referred to.

The photoelectrode 11 in the second submodule R2 has the other end 1b of the first base material 3A cut out in the width direction X2. That is, the first base material 3A in the first submodule R1 projects outward from the sealing material 15 on the other end 1b side in the width direction X2, and this overhanging portion serves as an extraction electrode (positive electrode 31). Then, as shown in FIG. 3A, the first base material 3A in the second submodule R2 is cut at the position of the sealing material 15 on the other end 1b side.

As shown in FIGS. 3A and 3B, in the first submodule R1 and the second submodule R2, the length is located at a position where the photoelectrode 11 overlaps with the predetermined sealing material 15 in the transparent conductive film 11A. The above-mentioned first insulating portion 16 extending along the direction X1 and dividing the transparent conductive film 11A in the width direction X2 is formed. In the first submodule R1, the first insulating portion 16 is formed on the transparent conductive film 11A that overlaps the sealing material 15 adjacent to the other end 1b side of the conductive material 14. In the second submodule R2, the first insulating portion 16 is formed on the transparent conductive film 11A that overlaps the sealing material 15 adjacent to the other end 1b side of the electrolytic solution 13.

The counter electrode 12 in the first submodule R1 has the other end 1b of the second base material 3B cut out in the width direction X2. That is, the second base material 3B in the second submodule R2 projects outward from the sealing material 15 on the other end 1b side in the width direction X2, and this overhanging portion serves as a take-out electrode (negative electrode 32). Then, as shown in FIG. 3B, the second base material 3A in the first submodule R1 is cut at the position of the sealing material 15 on the other end 1b side.

As shown in FIGS. 3A and 3B, in the first submodule R and the second submodule R, the length of the counter electrode 12 overlaps with the predetermined sealing material 15 in the counter conductive film 12A. A second insulating portion 17 extending along the direction X1 and dividing the opposed conductive film 12A in the width direction X2 is formed. In the first submodule R, the second insulating portion 17 is formed on the opposed conductive film 12A overlapping the sealing material 15 adjacent to the other end 1b side of the electrolytic solution 13. In the second submodule R, the second insulating portion 17 is formed on the opposed conductive film 12A that overlaps the sealing material 15 adjacent to the other end 1b side of the conductive material 14.

The solar cell module 1 of the present embodiment configured as described above is a first insulating portion of the first base material 3A arranged between cells C and C adjacent to each other in the width direction X2 of the first base material 3A. A conductive material 14 is arranged between 16 and the second insulating portion 17 of the second base material 3B, cells C and C adjacent to each other in the width direction X2 are electrically connected in series, and the first insulating line 18A The communication conductive members 14A on the one end 1a side of the width direction X2 of the submodules R1 and R2 divided in the longitudinal direction X1 are electrically connected in series. Then, the electric E flows from the other end 1b side of the width direction X2 of the first submodule R1 to the one end 1a side, and the electric E on the one end 1a side puts the conductive material 14 on the other end 1a side of the second submodule R2. The circuit configuration has a series structure in which electricity E flows from one end 1a side to the other end 1b side of the width direction X2 of the first submodule R1.
That is, as shown in FIG. 1, in the first submodule R1 and the second submodule R2, the directions of the electricity E flowing are opposite to each other in the width direction X2, and both the electricity extraction electrodes (positive electrode 31 and negative electrode 32) are taken out. Is arranged on one end 1a side in the width direction X2.

Further, in the solar cell module 1 of the present embodiment, as shown in FIGS. 1 to 3, the communicating conductive material 14A on the one end 1a side in the width direction X2 of the first base material 3A and the second base material 3B is arranged. The width of the conductive base material D1 from the portion to be connected to one end 1a is set to 2 mm or more, and the width dimension D2 of the communicating conductive material 14A on the one end 1a side is set to 0.5 mm or more.

Next, the manufacturing method of the solar cell module 1 of the present embodiment and the manufacturing method using the RtoR type manufacturing apparatus 4 will be specifically described with reference to the drawings.
As shown in FIG. 4, in the method for manufacturing the solar cell module 1, a transparent conductive film 11A is formed on the surface of the first substrate 3A, and a dye extending in the longitudinal direction X1 is formed on the surface of the transparent conductive film 11A. The step of forming the optical electrode 11 in which a plurality of adsorbed strip-shaped semiconductor layers 11B are formed, and the counter electrode 12 in which the counter electrode 12A is formed on the surface of the second base material 3B so as to face the optical electrode 11. A step of forming, a step of performing an insulating process for forming the first insulating portion 16 and the second insulating portion 17 extending in parallel with the longitudinal direction X1 with respect to the transparent conductive film 11A and the opposed conductive film 12A, and the width direction in a plan view. A step of providing a sealing material 15 for arranging a plurality of cells C in X2, a step of arranging a conductive material 14 on the sealing material 15, and a step of electrically connecting the optical electrode 11 and the counter electrode 12 and light. A step of providing the electrolytic solution 13 between the semiconductor layer 11B of the electrode 11 and the counter electrode 12 and a step of bonding the optical electrode 11 and the counter electrode 12 are performed.

Specifically, in the semiconductor electrode forming portion (not shown), for example, by using the aerosol deposition (AD) method, TiO2 is laminated on the first base material 3A on which the transparent conductive film 11A is formed. After forming the semiconductor layer 11B at intervals in the width direction X2, the photoelectrode 11 is formed by adsorbing the dye on the semiconductor layer 11B by a general method. Further, in the counter electrode forming portion (not shown), platinum (Pt) is laminated on the second substrate 3B on which the counter conductive film 12A is formed by the sputtering method to form the catalyst layer 12B, whereby the counter electrode 12 is formed. To form.

In the first base material 3A that forms the photoelectrode 11 produced by the semiconductor electrode forming portion and moves in the first moving direction P1, a semicircle is formed at the position between the semiconductor layer 11B and the semiconductor layer 11B in the cutting apparatus 41. Insulation processing is performed to form the first insulating portion 16 extending in parallel with the longitudinal direction X1 by the rotation of the blade 52. At this time, the first insulating portion 16 is formed with a regular insulating processing pattern in which the positions are alternately displaced in the width direction X2 at regular intervals (the length of the submodule R in the longitudinal direction X1). By arranging the insulating processing patterns alternately in this way, the positions of the positive electrode (positive electrode) and the negative electrode (negative electrode) can be regularly exchanged for each submodule R.

Next, after processing the first insulating portion 16 of the photoelectrode 11, the sealing material 15 is coated on the photoelectrode 11 formed in a predetermined region of the first base material 3A by the sealing material coating portion 42. At this time, the semiconductor layer 11B is coated so that the sealing material 15 is not covered.
Then, after arranging the conductive material 14 between the sealing materials 15 in the conductive material arranging portion 43, the electrolytic solution 13 is placed in the uncoated region of the sealing material 15 in the first base material 3A in the electrolytic solution coating portion 44. To paint.

On the other hand, in the second base material 3B which forms the counter electrode 12 produced by the counter electrode forming portion and moves in the second moving direction P2, the position between the catalyst layer 12B and the catalyst layer 12B in the cutting apparatus 47. Insulation processing is performed to form the second insulating portion 17 extending in parallel with the longitudinal direction X1 by the rotation of the semicircular blade 52. At this time, the second insulating portion 17 is formed with a regular insulating processing pattern in which the positions are alternately displaced in the width direction X2 at regular intervals (the length of the submodule R in the longitudinal direction X1). By arranging them alternately in this way, the positions of the + pole and the-pole can be regularly exchanged for each submodule R.

Next, in the base material bonding portion 45, the sealing material 15 is cured by the curing treatment portion (not shown), and the insulating processed first base material 3A and the second base material 3B are overlapped with each other. By passing a pair of bonding rollers 45A and 45B, both base materials 3A and 3B are adhered and bonded. At this time, as shown in FIGS. 3A and 3B, the first insulating portion 16 of the first base material 3A and the second insulating portion 17 of the second base material 3B are in the width direction in the bonded state. The position is shifted to X2, so that a plurality of cells C divided and arranged in the width direction X2 via the conductive material 14 (see FIG. 2) are electrically connected in series.

Next, after bonding, in the ultrasonic fusion section 46, as shown in FIG. 4, the first base material 3A and the second base material 3B are fused by ultrasonic vibration at regular intervals in the longitudinal direction X1. A fused portion 18 (18A, 18B) 18A that is worn and extends along the width direction X2 is formed, and is divided into a plurality of submodules R, R, ....

At this time, in the portion of the optical electrode 11 and the counter electrode 12 excluding the positive electrode 31 and the negative electrode 32, the first fused portion 18A (first insulation) that does not partially insulate the conductive material 14 on the one end 1a side in the width direction X2. The line) and the second fused portion 18B (second insulating line) that insulates the entire width direction X2 are alternately formed in the longitudinal direction X1. After that, the photoelectrode 11 and the counter electrode 12 are cut at the position of the second fused portion 18B. The alternate long and short dash line of reference numeral 18L in FIG. 5 indicates a cutting line at the second fused portion 18B.
Then, the solar cell module cut by the second fusion section 18B has the conductive materials 14 on the one end 1a side of the width direction X2 of the pair of adjacent submodules R1 and R2 divided by the first fusion section 18A. Will be manufactured in an electrically connected state.

It is also possible to improve the manufacturing efficiency by simultaneously performing the insulating processing of the first fused portion 18A and the second insulating portion 18B.
Further, the insulation processing of the fused portion 18 in which the photoelectrode 11 and the counter electrode 12 are fused along the width direction X2 is the second insulation of the first insulating portion 16 of the first base material 3A and the second base material 3B. It may be performed at the same time as the unit 17, whereby the manufacturing efficiency can be improved.

Next, the above-mentioned solar cell module 1 and the method of manufacturing the solar cell module 1 The operation of the solar cell module 1 will be described in detail with reference to the drawings.
In the solar cell module 1 according to the present embodiment, as shown in FIGS. 1 and 2, the electric charge E created for each cell C flows from the other end 1b of the first submodule R toward one end 1a. , Flows from one end 1a of the second submodule R toward the other end 1b. Further, since one end 1a of the first submodule R and one end 1a of the second submodule R are connected by the communicating conductive material 14A, the electric E of one end 1a of the first submodule R connects the communicating conductive material 14A. It flows toward the second submodule R side via. As described above, the solar cell module 1 has a configuration in which the submodules R and R are electrically connected to each other on the one end 1a side and the electric charge E can be taken out on the other end 1b side. That is, the entire structure is such that electricity E flows in a U shape in a plan view, and the extraction electrodes (positive electrode 31 and negative electrode 32) can be on the same side (the other end 1b) in the width direction X1, so that the wiring structure is simplified. The wiring work can be easily performed.

The present embodiment has a simple structure in which the conductive material 14 is arranged on one end 1a side of the adjacent second submodules R and R to provide the communicating conductive material 14A. That is, since the structure is as simple as applying the conductive material 14 in a line, it can be easily applied to the RtoR method.
In this case, since it can be realized by a manufacturing process in which the communicating conductive material 14A is continuously arranged in the longitudinal direction X1 by the RtoR method, it is not necessary to add a new working process. That is, on one end 1a side of the width direction X2, for example, a copper tape is attached or soldered along the longitudinal direction X1 in the work after the battery is created as in the above-described embodiment. It becomes unnecessary. Therefore, it is possible to omit the manufacturing process for providing the wiring material, and it is possible to improve the work efficiency required for manufacturing with a simple configuration.

Moreover, by arranging the conductive material 14 (communication conductive material 14A) in the second region M2 described above, both the transparent conductive film 11A on the first base material 3A side and the opposing conductive film 12A on the second base material 3B side can be covered. Since electricity can flow, the path of electricity E is doubled, the electric resistance is reduced, and the current value flowing through these conductive films 11A and 12A can be halved or less, which deteriorates battery performance. It is possible to suppress the deterioration of power generation performance.
In order to reduce such a current value to 1/2 or less, the conductive base material width D1 from the portion where the communicating conductive material 14A is arranged to one end 1a is 2 mm or more and one end as in the present embodiment. It is preferable that the width dimension D2 of the communicating conductive material 14A on the 1a side is 0.5 mm or more.

As described above, in the solar cell module 1 of the present embodiment, the take-out electrodes of the positive electrode 31 and the negative electrode 32 can be arranged on the other end 1b side of the width direction X2, and the electrodes 31 and 32 are arranged at a short distance from each other. As a result, the wiring structure is simple, and the work related to wiring can be easily performed. Therefore, it is possible to eliminate the problem that the electrodes are separated from each other and it becomes difficult to wire, as in the case where the take-out electrodes are provided on both the left and right sides in the width direction X2.

Although the embodiment of the solar cell module and the method for manufacturing the solar cell module according to the present invention has been described above, the present invention is not limited to the above embodiment and is appropriately modified without departing from the spirit of the present invention. It is possible.

For example, in the above-described embodiment, the number of cells provided in each of the submodules R1 and R2 is two, but the number is not limited to this, and an appropriate number can be set.
Further, in the present embodiment, the width D1 of the conductive base material from the portion where the communicating conductive material 14A is arranged to one end 1a is 2 mm or more, and the width dimension D2 of the communicating conductive material 14A on the one end 1a side is 0.5 mm or more. Although it is set, it is not limited to such dimensions.

In addition, it is possible to replace the components in the above-described embodiment with well-known components as appropriate without departing from the spirit of the present invention.

1 Solar cell module 1a One end 1b Other end 4 Manufacturing equipment 11 Photoelectrode (first electrode)
11A transparent conductive film 11B semiconductor layer 12 counter electrode (second electrode)
12A Opposing conductive film 12B Catalyst layer 3A First base material 3B Second base material 13 Electrolyte 14 Conductive material 15 Encapsulant 16 First insulation part 17 Second insulation part 18 Fusion part (insulation line)
18A 1st fusion part (1st insulation line)
18B 2nd fusion part (2nd insulation line)
C cell R submodule X1 longitudinal direction (first direction)
X2 width direction (second direction, width direction of first base material and second base material)

Claims (4)

A transparent conductive film was formed on the surface of the first base material, and a plurality of band-shaped semiconductor layers in which dyes extending in the first direction were adsorbed were formed on the surface of the transparent conductive film of the first base material. With one electrode
A second electrode having an opposed conductive film formed on the surface of the second substrate so as to face the first electrode,
An electrolytic solution sealed between the semiconductor layer of the first electrode and the second electrode,
A sealing material that seals the electrolytic solution and arranges a plurality of cells divided in a second direction orthogonal to the first direction in a plan view.
A conductive material provided in a state of being covered with the sealing material and electrically connecting the first electrode and the second electrode.
An insulating line extending along the second direction with respect to the first electrode and the second electrode,
With
The plurality of cells arranged in the second direction are electrically connected by series wiring, and the cells are electrically connected to each other.
The conductive material is arranged between the first insulating portion of the first base material and the second insulating portion of the second base material arranged between cells adjacent to each other in the second direction, and the conductive material is arranged. Adjacent cells are connected to each other
It is characterized in that the conductive materials on one end side in the second direction of a pair of adjacent submodules divided in the first direction by the insulation line are electrically connected to each other. Solar cell module. The width of the conductive base material from the portion of the first base material and the second base material on which the conductive material is arranged on one end side in the second direction to the one end is 2 mm or more, and the one end side is said to be said. The solar cell module according to claim 1, wherein the width dimension of the conductive material is 0.5 mm or more. It is a manufacturing method of a solar cell module for continuously manufacturing a solar cell module by a roll-to-roll method.
A transparent conductive film is formed on the surface of the first base material, and a plurality of band-shaped semiconductor layers in which a dye extending in the longitudinal direction of the first base material is adsorbed on the surface of the transparent conductive film of the first base material. The process of forming the formed first electrode and
A step of forming a second electrode having an opposed conductive film formed on the surface of the second base material so as to face the first electrode, and
A step of insulating the transparent conductive film and the opposed conductive film in parallel with the longitudinal direction.
A step of providing a sealing material for arranging a plurality of cells in the width direction of the first base material and the second base material orthogonal to the longitudinal direction in a plan view, and
A step of arranging a conductive material in a region on the transparent conductive film of the first base material where the semiconductor layer is not formed and electrically connecting the first electrode and the second electrode.
A step of providing an electrolytic solution between the semiconductor layer of the first electrode and the second electrode, and
The step of bonding the first electrode and the second electrode and
A first insulating line extending along the width direction with respect to the first electrode and the second electrode and not partially insulating the conductive material on one end side in the width direction, and the entire width direction. A step of alternately forming a second insulating line to be insulated in the longitudinal direction, and
A step of cutting the first electrode and the second electrode at the position of the second insulation line, and
Have,
The conductive material is arranged on one end side in the width direction.
In the solar cell module cut by the second insulation line, the conductive materials on one end side in the width direction of the pair of adjacent submodules divided by the first insulation line are electrically connected to each other. A method for manufacturing a solar cell module. The first insulating line and the second insulating line are formed by a fused portion fused along the width direction, or the insulated portion insulated by an insulating processing means is closed with a sealing material. The method for manufacturing a solar cell module according to claim 3, wherein the solar cell module is formed of.

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