TW201417308A - Electric module - Google Patents

Abstract

This electric module has a plurality of cells that are disposed on a same surface, and the electric module is provided with a first electrode, and a second electrode that is disposed to face the first electrode, said first electrode and second electrode being bonded to each other with an electrolyte therebetween. The electric module is also provided with a first electrode terminal connected to the first electrode, and a second electrode terminal connected to the second electrode, and the electric module employs a first structure, in which the second electrode terminal is led out to the external surface side of the first electrode, said second electrode terminal being connected to the second electrode through an opening that is provided in the first electrode by penetrating the first electrode in the thickness direction, and/or a second structure, in which the first electrode terminal is led out to the external surface side of the second electrode, said first electrode terminal being connected to the first electrode through an opening that is provided in the second electrode by penetrating the second electrode in the thickness direction.

Description

Electrical module

The invention relates to an electrical module.

The present application claims priority based on Japanese Patent Application No. 2012-232392, filed on Jan.

In recent years, as a power generation device that replaces fossil fuels, solar cells have attracted attention, and yttrium (Si) solar cells and dye-sensitized solar cells are being developed. In particular, the structure and manufacturing method of a dye-sensitized solar cell which is inexpensive and easy to mass-produce is being extensively researched and developed.

The dye-sensitized solar cell includes: a first electrode having a transparent conductive film formed on a surface of the transparent substrate; a semiconductor layer carrying the dye on the surface of the transparent conductive film; and a second electrode on the opposite substrate The film formation has a counter conductive film disposed opposite to the transparent conductive film, and a sealing material that forms a gap between the semiconductor layers to surround the semiconductor layer, and bonds the first electrode and the second electrode to form a sealed unit cell And an electrolyte that is injected into the unit cell.

Further, when the unit cells forming the dye-sensitized solar cell are connected in series, or the electrode terminals are taken out from the first electrode and the second electrode of one unit cell, as shown in FIG. 12, the transparent conductive film 51 and the pair are provided. The conductive film 52 is shifted in one direction so that a part of the transparent conductive film 51 of one unit cell C is disposed opposite to a portion of the opposite conductive film 52 of the adjacent unit cell C, so that the transparent conductive film at the end portion is disposed. Part of 51 and at the end A part of the opposite conductive film 52 protrudes outside the unit cell C to connect the terminals.

Prior technical literature Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2009-110797

However, as described above, the prior method in which the bonding positions of the transparent conductive film 51 and the opposite conductive film 52 are shifted to connect the unit cells to each other has a problem that it is difficult to form the unit cells C of the dye-sensitized solar cell in a matrix. The vertical and horizontal crosses are arranged on a single substrate and connected in series and in parallel. In addition, a method of causing a part of the transparent conductive film 51 at the end and a part of the opposite conductive film 52 to protrude outside the unit cell C or exposing the end faces of the respective unit cells C to connect the terminals makes the conductive It is also complicated that the material is bonded to a part of each of the transparent conductive films 51 which are protruded or exposed and a part of the opposite conductive film 52, and is connected to the adjacent unit cells. In particular, this method has a problem in that it is not suitable for continuously manufacturing an electric module having a plurality of unit cells in a roll-to-roll manner.

Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide an electric module which can improve the degree of freedom in connection between unit cells and can easily connect unit cells to each other.

An electric module according to an aspect of the present invention includes an electric module of a plurality of batteries disposed on the same surface, and includes: a first electrode; and a second electrode disposed opposite to the first electrode; The electrolyte between the first electrode and the second electrode is connected to the first a first electrode terminal of the electrode and a second electrode terminal connected to the second electrode; and at least one of the first structure and the second structure, wherein the first structure penetrates the first electrode in a thickness direction The second electrode terminal connected to the second electrode is taken out to the outer surface side of the first electrode, and the second structure is an opening provided through the second electrode in the thickness direction. The first electrode terminal connected to the first electrode is taken out to the outer surface side of the second electrode.

According to the configuration of the electric module of one aspect of the present invention, even when a plurality of unit cells constituting the power generating body are disposed on the same surface, a plurality of unit cells are not divided (cut) without The end faces of the respective unit cells of the one electrode and the second electrode are exposed, and the electric power of all or any of the batteries is taken out. Moreover, since the current path until the electrode is taken out can be shortened, the series resistance loss can be reduced.

An electric module according to an aspect of the present invention may further include: a first opening that penetrates the first electrode in a thickness direction; and a second opening that penetrates the second electrode in a thickness direction; In the case of the first electrode and the second electrode, the position of the first opening and the position of the second opening are shifted from each other; the first electrode terminal is taken out from the second opening; and the second electrode is taken out from the first opening Electrode terminal.

According to this configuration, the first electrode terminal and the second electrode terminal are taken out from the different opening portions. Therefore, the first electrode terminal and the second electrode terminal are taken out from any position close to or away from each other.

Further, in the electrical module according to an aspect of the invention, the first electrode terminal and the second electrode terminal may be formed adjacent to each other when the first electrode and the second electrode are planarly viewed.

According to this configuration, the first electrode terminal and the second electrode terminal can be brought close to each other, and the first electrode terminal and the second electrode terminal can be provided by being biased to one portion of one unit cell.

Further, in the electric module according to the aspect of the invention, the first electrode may be formed with a slit forming a tongue, and the tongue may be folded back on an outer surface of the first electrode on which the tongue is formed; The first electrode terminal is provided on an outer surface of the tongue that is folded back; the second electrode terminal is taken out from an opening formed by the tongue being folded back, and the second electrode terminal is connected to the opening opposite to the opening 2 electrodes.

Further, in the electric module according to one aspect of the invention, a slit for forming a tongue may be formed on the second electrode, and the tongue may be folded back on an outer surface of the second electrode on which the tongue is formed. Providing the second electrode terminal on an outer surface of the tongue that is folded back; taking out the first electrode terminal from an opening formed by folding the tongue, and the first electrode terminal is connected to the opening The first electrode. According to this configuration, only one of the first electrode and the second electrode is opened, and the first electrode terminal and the second electrode terminal are taken out. Further, the first electrode terminal and the second electrode terminal are taken out to the outer surface side of the same substrate.

Further, in the electric module according to an aspect of the present invention, a plurality of electrode terminal pairs including the first electrode terminal and the second electrode terminal may be provided in one unit cell, and the electrode may be taken out from the unit cell. Terminal pair.

According to this configuration, the first electrode terminal or the second electrode terminal connected to the adjacent unit cells can be selected, and the degree of freedom in the direction in which the unit cells are connected can be improved.

Further, in the electric module according to an aspect of the present invention, at least one of the first battery and the second battery adjacent to each other may be provided by the first unit provided in the first unit battery An electrode terminal pair formed between the first electrode terminal and the first electrode terminal of the second unit cell, the first electrode terminal is taken out from the first unit cell, and the first electrode terminal is taken out from the second unit cell .

Further, in the electric module according to an aspect of the present invention, at least one of the first unit cells and the second unit cells adjacent to each other may be provided by the second unit provided in the first unit battery. An electrode terminal pair formed between the electrode terminal and the second electrode terminal provided in the second unit cell, the second electrode terminal is taken out from the first unit cell, and the second electrode terminal is taken out from the second unit cell.

Further, in the electric module according to an aspect of the present invention, at least one of the first unit cells and the second unit cells adjacent to each other may be provided by the first unit provided in the first unit battery. An electrode terminal pair formed between the electrode terminal and the second electrode terminal provided in the second unit cell, the first electrode terminal is taken out from the first unit cell, and the second electrode terminal is taken out from the second unit cell. With this configuration, it is possible to easily connect the adjacent unit cells to each other in series or in parallel. Further, a series connection or a parallel connection may be selected between adjacent unit cells.

Further, the electrical module having a plurality of unit cells may be cut to form an electrical module according to an aspect of the present invention.

According to this configuration, since the first electrode terminal and the second electrode terminal are taken out to the plate surface of the substrate of the electric module, it is possible to not divide (cut) a plurality of unit cells without exposing the end faces of the respective unit cells. Take out the power of each battery. Moreover, since the current path until the electrode is taken out can be shortened, the series resistance loss is reduced.

According to one aspect of the present invention, even if a module having a plurality of unit cells is provided on the same surface, the first electrode terminal or the second electrode terminal can be easily taken out from each unit cell. Moreover, since the unit cells can be easily connected to each other and the connection method can be freely selected, the effect of freely setting the output of the electric module can be produced.

1A, 1B, 1C, 1D‧‧‧Dye-sensitized solar cells (electrical modules)

2‧‧‧1st substrate

2a‧‧‧ board

2b‧‧‧External surface

5‧‧‧1st electrode

6‧‧‧2nd substrate

6a‧‧‧ board

6b‧‧‧External surface

8‧‧‧2nd electrode

9‧‧‧ Sealing material

11‧‧‧1st electrode terminal

12‧‧‧2nd electrode terminal

15, 16‧‧‧ openings

20‧‧‧ tongue

21‧‧‧ incision

22‧‧‧ Openings

C‧‧‧ unit battery

W1‧‧‧ Width of the opposite conductive film 7

W2‧‧‧The width of the sealing material 9

Fig. 1A is a view schematically showing an electric module shown as a first embodiment of the present invention, and is a cross-sectional view as seen along an arrow Z1-Z2 in Fig. 1B.

Fig. 1B is a view schematically showing an electric module shown as a first embodiment of the present invention, and is a plan view of Fig. 1A.

Fig. 2A is a plan view showing a part of a manufacturing procedure of an electric module shown as a first embodiment of the present invention.

Fig. 2B is a plan view showing a part of a manufacturing procedure of the electric module shown as the first embodiment of the present invention.

Fig. 3 is a bottom view showing a part of a manufacturing process of the electric module shown as the first embodiment of the present invention.

Fig. 4 is a plan view showing a part of a manufacturing procedure of an electric module shown as a first embodiment of the present invention.

Fig. 5A is a plan view showing a part of a manufacturing procedure of an electric module shown as a first embodiment of the present invention.

Fig. 5B is a view showing a part of a manufacturing procedure of the electric module shown as the first embodiment of the present invention, and is observed along arrows X1-X2 and Y1-Y2 shown in Fig. 5A. A cross-sectional view as seen.

Fig. 5C is a view showing a part of the manufacturing procedure of the electric module shown as the first embodiment of the present invention, and is a cross-sectional view as seen along the arrow Z1-Z2 shown in Fig. 5A.

Fig. 6A is a plan view showing an electric module shown as a second embodiment of the present invention.

Fig. 6B is a view showing an electric module shown as a second embodiment of the present invention, and is a cross-sectional view as seen along an arrow Z3-Z4 in Fig. 6A.

Fig. 7 is a plan view showing a modification of the electric module shown as the second embodiment of the present invention.

Fig. 8 is a plan view showing a modification of the electric module shown as the second embodiment of the present invention.

Fig. 9 is a cross-sectional view showing a modification of the electric module shown as the second embodiment of the present invention.

Fig. 10 is a cross-sectional view schematically showing an electric module shown as a third embodiment of the present invention.

Fig. 11 is a cross-sectional view schematically showing an electric module shown as a fourth embodiment of the present invention.

Figure 12 is a diagram showing a prior electrical module.

(First embodiment)

Hereinafter, a first embodiment of a method for manufacturing an electric module and an electric module according to the present invention will be described by taking a dye-sensitized solar cell 1A as an example.

In each of the drawings used in the following description, the scale of each member is appropriately changed in order to make each member identifiable.

As shown in FIG. 1A and FIG. 1B, the dye-sensitized solar cell 1A includes a first electrode 5 including a transparent conductive film 3 and a semiconductor layer 4 on a first substrate 2 (one substrate), and a second electrode 8 The opposite conductive film 7 is provided on the second substrate 6 (the second substrate 6 disposed at a position facing the first substrate 2 and other substrates). Further, in a state in which a space between the first electrode 5 and the second electrode 8 is interposed with a separator (not shown), the edge of the first substrate 2 and the edge of the second substrate 6 are sealed by a sealing material 9 to Framed. The space surrounded by the sealing material 9 is divided into a plurality of unit cells C by adhesion of the first substrate 2 and the second substrate 6, thereby forming a plurality of power generating bodies. Further, an electrolyte (electrolyte) 10 is filled in the space C1 in each unit cell C.

In the dye-sensitized solar cell 1A, a first electrode terminal 11 connected to the first electrode 5 of each unit cell C and a second electrode terminal 12 connected to the second electrode 8 are provided.

The first substrate 2 and the second substrate 6 are members of the transparent conductive film 3 and the base of the opposite conductive film 7, and are, for example, made of polyethylene naphthalate (PEN), polyethylene terephthalate. A flat member formed of a transparent thermoplastic resin such as a diester (PET) is obtained by cutting into a substantially rectangular shape. Further, the first substrate 2 and the second substrate 6 may be substrates formed in a film shape.

The transparent conductive film 3 is formed on substantially the entire surface 2a of the first substrate 2.

For example, tin oxide (ITO), zinc oxide, or the like can be used as the material of the transparent conductive film 3.

The transparent conductive films 3 respectively disposed on the unit cells C and C adjacent to each other are insulated (insulating treatment) on the lines L1 to L3 located between the batteries C, C, .

Thereby, the dye-sensitized solar cell 1A has a plurality of unit cells C insulated from each other and disposed on the same surface.

The semiconductor layer 4 has a function of receiving electrons from a sensitizing dye to be described later, and is provided on the surface 3a of the transparent conductive film 3 by a semiconductor made of a metal oxide. As the metal oxide, for example, titanium oxide (TiO ₂ ), zinc oxide (ZnO), tin oxide (SnO ₂ ), or the like can be used.

The semiconductor layer 4 carries a sensitizing dye. The sensitizing dye is composed of an organic dye or a metal complex dye. For example, various organic dyes such as coumarin, polyene, cyanine, hemi-cyanine, and thiophene can be used as the organic dye. For example, a ruthenium complex or the like can be preferably used as the metal complex dye.

In this manner, the transparent conductive film 3 is formed on one surface 2a of the first substrate 2, and the semiconductor layer 4 formed on the surface 3a of the transparent conductive film 3 is provided to constitute the first electrode 5.

The opposite conductive film 7 is formed on the entire plate surface 6a of the second substrate 6.

For example, tin oxide (ITO), zinc oxide, or the like can be used as the material of the opposite conductive film 7. Further, a catalyst layer (not shown) made of carbon paste, platinum or the like may be formed on the surface 7a of the counter conductive film 7.

The opposite conductive films 7 respectively disposed adjacent to the unit cells C and C adjacent to each other are insulated (insulating treatment) on the lines L1 to L3 between the unit cells C, C, .

Thereby, the dye-sensitized solar cell 1A has a plurality of unit cells C insulated from each other and disposed on the same surface.

In this manner, the opposite conductive film 7 is formed on one surface 6a of the second substrate 6, thereby constituting the second electrode 8.

The second electrode 8 is disposed to face the first electrode 5 so that the opposite conductive film 7 and the transparent conductive film 3 face each other.

A hot melt resin or the like can be used as the sealing material 9.

The sealing material 9 seals the electrolyte 10 shown in FIG. 1A to FIG. 2A which is subjected to insulation treatment. The inside of the battery C divided by the lines L1 to L3 shown in FIG. As shown in FIG. 1A, the sealing material 9 is placed in the space C1 so that the first electrode terminal 11 and the second electrode terminal 12 are taken out to the outside of the space C1 in which the electrolytic solution 10 is sealed, and the first electrode terminal 11 is placed. The second electrode terminal 12 takes out electric power from the first electrode 5 and the second electrode 8 extending along the outer side of the space C1. Specifically, the sealing material 9 is disposed on the entire circumference of the end edges R1 to R4 shown in FIG. 4 of the first electrode 5 and the second electrode 8 of each unit cell C, and is disposed on the transparent conductive film 3 and the opposite direction. The surface of the conductive film 7 is formed in a frame shape of the hollow holes 19. Further, an elongated hole h for disposing the first electrode terminal 11 and the second electrode terminal 12 on the end edge R1 is formed outside the hollow hole 19 of the sealing solution electrolyte 10. The sealing material 9 formed in such a shape is pressed by heating, and as shown in FIG. 1A, the first electrode 5 and the second electrode 8 are followed. Further, the sealing material 9 may be disposed along the entire circumference of the edge of the second electrode 8 or may be disposed between the first electrode 5 and the second electrode 8.

A sheet such as a nonwoven fabric having a sealing material 9 and a plurality of holes (not shown) through which the electrolytic solution 10 passes can be used as a separator (not shown).

For example, a non-aqueous solvent such as acetonitrile or propionitrile may be used; and a solution containing an electrolyte solution and iodine such as lithium iodide may be mixed with a liquid component such as dimethylidene iodide or butylmethyl iodide iodide or the like. Etc. as the electrolyte 10. Further, in order to prevent the reverse electron transfer reaction, the electrolytic solution 10 may also contain a third butyl pyridine.

As shown in FIG. 1B, when the first substrate 2 or the second substrate 6 is viewed in plan view (planar view), the first electrode terminal 11 and the second electrode terminal 12 are formed in the sealing material 9 so as to be displaced from each other in position. The inside of the long hole h at the position corresponding to the end edge R1 (i.e., the area surrounded by the sealing material 9 separately from the space C1 formed by the hollow hole 19).

Furthermore, the positions at which the first electrode terminal 11 and the second electrode terminal 12 are formed are not as in the present embodiment. In a state, it is limited to a region (long hole h) surrounded by the sealing member 9. The first electrode terminal 11 and the second electrode terminal 12 can be freely formed without hindering the conduction of the first electrode 5 and the first electrode terminal 11 and preventing the second electrode 8 and the second electrode terminal 12 from being electrically connected. The position at which the electrode terminals 11, 12 are formed is selected. Specifically, for example, a configuration may be adopted in which the first electrode 5 and the second electrode 8 are prevented from being short-circuited by an insulating material on the outer side of the region surrounded by the sealing member 9, and the first electrode terminal 11 and the first electrode 5 are realized. The second electrode terminal 12 and the second electrode 8 are electrically connected to each other.

As shown in FIG. 1A, the first electrode terminal 11 is provided in contact with the transparent conductive film 3 of the first electrode 5, and penetrates the opening 15 of the second electrode 8 opposed to the transparent conductive film 3 in the thickness direction. The (second opening) is taken out to the outer surface 6b side of the second substrate 6 of the second electrode 8 (second structure).

The second electrode terminal 12 is provided in contact with the opposing conductive film 7 of the second electrode 8 and penetrates the opening 16 of the first electrode 5 opposed to the opposite conductive film 7 in the thickness direction (first opening) The part is taken out to the outer surface 2b side of the first substrate 2 of the first electrode 5 (first structure).

Each of the first electrode terminal 11 and the second electrode terminal 12 is formed of a conductive member made of a metal such as a copper foil or an aluminum foil.

Next, a method of manufacturing the dye-sensitized solar cell 1A will be described with reference to FIGS. 2A to 9 .

The method for producing the dye-sensitized solar cell 1A according to the first embodiment of the present invention includes (II) an opening forming step and a (IV) terminal forming step.

(II) In the opening forming step, the openings 16 and 15 are formed in the first electrode 5 and the second electrode 8, respectively.

(IV) In the terminal forming step, the second electrode terminal 12 is connected to the second electrode 8 opposed to the opening 16 , and the first electrode terminal 11 is connected to the first electrode 5 facing the opening 15 . Further, the first electrode terminal 11 is passed through the opening 15 and the second electrode terminal 12 is passed through the opening 16 to take out the first electrode terminal 11 on the outer surface 6b side of the second substrate 6 on which the opening 15 is formed. The second electrode terminal 12 is taken out from the outer surface 2b side of the substrate 2.

Further, the manufacturing method of the present embodiment includes the (I) electrode forming step performed before the (II) opening portion forming step, the (III) unit cell forming step performed before the (IV) terminal forming step, and (IV) The (V) liquid injection step performed after the terminal forming step. Hereinafter, each step will be described.

(I) <electrode forming step>

In the electrode formation step, as shown in FIG. 2A, the transparent conductive film 3 is formed on one surface 2a of the first substrate 2, and the first electrode 5 and the second electrode 8 are formed. The first electrode 5 is as shown in FIG. 2B. The semiconductor layer 4 is formed on the surface 3a of the transparent conductive film 3. As shown in FIG. 3, the second electrode 8 is formed with a counter conductive film 7 on one surface 6a of the second substrate 6. Specifically, the first electrode 5 and the second electrode 8 are formed as follows.

As shown in FIG. 2A, a substrate made of PET or the like is used as the first substrate 2.

Indium tin oxide (ITO) or the like is sputtered onto the entire surface 2a of the first substrate 2 to form a transparent conductive film 3. At this time, the transparent conductive film 3 is infiltrated in advance on the lines L1 to L3 by laser or the like so that the unit cells C and C adjacent to each other are reliably insulated from each other.

As shown in FIG. 2B, the semiconductor layer 4 is formed on the surface 3a of the transparent conductive film 3 so as to be porous, for example, by a low-temperature film formation method such as a vapor deposition method or a cold spray method. In addition, when the first substrate 2 is a material having heat resistance, it may be a mask, In the printing method or the like, a paste containing titanium oxide which can be calcined is applied onto the surface 3a of the transparent conductive film 3, and then calcined at a temperature of about 500 ° C to form a semiconductor layer in a porous manner. 4.

In either case, as shown in FIG. 2A, the end edges R1 to R4 of the sealing material 9 are left to form the semiconductor layer 4.

After the semiconductor layer 4 is formed, the semiconductor layer 4 is immersed in a sensitizing dye solution in which a sensitizing dye is dissolved in a solvent, and the semiconductor layer 4 is loaded with a sensitizing dye. Further, the method of supporting the sensitizing dye on the semiconductor layer 4 is not limited to the above method. For example, a method in which the semiconductor layer 4 is continuously moved, immersed, and lifted while moving the sensitizing dye solution may be employed. Hey.

According to the above, the first electrode 5 shown in Fig. 2B can be obtained.

As shown in FIG. 3, the second electrode 8 is sputtered with ITO, zinc oxide, or platinum to a plate surface 6a of the second substrate 6 made of polyethylene terephthalate (PET) or the like, and a film formation pair is formed. To the conductive film 7. The opposite conductive film 7 may be a conductive film formed by a printing method, a spray method, or the like. At this time, the opposite conductive film 7 is infiltrated in advance on the lines L1 to L3 by laser or the like so as to insulate between the adjacent unit cells C and C.

(II) <Opening portion forming step>

In the opening forming step, as shown in FIGS. 2A and 3, the opening portion 16 is formed in the end edge R1 of the first electrode 5 which is formed by the electrode forming step. Further, the opening 15 is formed in the end edge R1 of the second electrode 8 which is formed by the electrode forming step. Here, when the transparent conductive film 3 and the opposite conductive film 7 are arranged to face each other, the positions of the openings 16 and 15 are determined such that the positions of the openings 16 and 15 are different from each other (that is, the positions are shifted). . Furthermore, after the openings 16 and 15 are formed, the The transparent conductive film 3 and the opposite conductive film 7 are respectively insulated by laser or the like at the opening end edges of the openings 16 and 15.

(III) <Unit battery forming step>

In the unit cell forming step, the first electrode 5 and the second electrode 8 are disposed to face each other and bonded to each other, and sealed by the sealing member 9.

[Configuration of sealing material]

Specifically, as shown in FIG. 4, a sheet-like sealing material 9 is disposed so as to surround the semiconductor layer 4, and the sealing material 9 has a frame (frame shape) which is along the transparent conductive film 3 of the semiconductor layer 4. The peripheral edges R1 to R4 are formed with predetermined hollow holes 19, 19, ... and long holes h, and the openings 15 and 16 are disposed inside. Further, the long hole h may be formed to coincide with the openings 15 and 16 and to surround the openings 15 and 16.

[Substrate bonding]

Next, as shown in FIG. 5A and FIG. 5B, the transparent conductive film 3 and the opposite conductive film 7 are opposed to each other with the separator (not shown) interposed therebetween, and the second electrode 8 is brought into contact with the first electrode. 5.

In this case, for example, a plurality of liquid-filling hole forming members (not shown) which are formed of a release resin sheet or the like are disposed in advance in each unit cell formed between the first electrode 5 and the second electrode 8. The space C1 of C is such that the electrolyte injection hole can be easily formed. For example, polyester, polyethylene terephthalate, polybutylene terephthalate or the like can be used as the release resin sheet.

[Next steps]

In the subsequent step, the end edges R1 to R4 (see FIG. 4) of the first electrode 5 and the second electrode 8 which are disposed opposite each other are heated and pressed in the lamination direction to be followed. At this time, the heat-resistant temperature of the member for forming a liquid injection hole is higher than the heat-hardening temperature of the sealing member 9, and the member for forming the liquid injection hole Since the non-adhesiveness is excellent, the sealing material 9 which is in contact with the member for forming a liquid injection hole does not follow the member for forming a liquid injection hole. Therefore, both surfaces of the member for forming a liquid injection hole are not adjacent to the first electrode 5 or to the second electrode 8.

In this manner, the sealing material 9 provided between the first electrode 5 and the second electrode 8 forms the space C1 to surround the semiconductor layer 4, and forms a plurality of unit cells C on which the long holes h located outside the space C1 are formed.

(IV) <terminal forming step>

In the terminal forming step, as shown in FIG. 5B and FIG. 5C, the second electrode terminal 12 is inserted from the opening 16 formed in the first electrode 5, and the second electrode terminal 12 is brought into contact with the opposite conductive film 7. The 2 electrode terminal 12 is taken out to the side of the outer surface 2b of the first substrate 2 on which the opening 16 is formed, and is fixed to the outer surface 2b.

In addition, the first electrode terminal 11 is inserted into the opening 15 formed in the second electrode 8, and the first electrode terminal 11 is brought into contact with the transparent conductive film 3, and the first electrode terminal 11 is taken out to form the opening 15 The outer surface 6b side of the second substrate 6 is fixed to the outer surface 6b.

Thus, the bonded body 1a in which the first electrode 5 and the second electrode 8 are laminated can be obtained.

(V) <Injection step>

In the liquid injection step, a member for forming a liquid injection hole (not shown) which is previously interposed between the first electrode 5 and the second electrode 8 is removed, or the first substrate 2 or the other method is used. A liquid injection hole (not shown) is formed in the substrate 6. Then, the bonded body 1a of the first electrode 5 and the second electrode 8 is placed in a reduced pressure atmosphere, and the liquid injection hole is immersed in a container (not shown) in which the electrolytic solution 10 is held, and the electrolytic solution 10 is injected by vacuum suction. To the space C1.

After the electrolyte 10 is injected, a liquid injection hole (not shown) is sealed by an adhesive or the like, and The first electrode 5, the second electrode 8, and the sealing material 9 seal the electrolytic solution 10, and obtain a dye-sensitized solar cell 1A as shown in FIGS. 1A and 1B in which a plurality of unit cells C are arranged, and the unit cell C is sealed. The first electrode terminal 11 and the second electrode terminal 12 are provided outside the space C1 of the electrolytic solution 10.

Further, instead of the step of vacuum suctioning the electrolytic solution 10 in the liquid filling step, a gel-like electrolyte may be applied to the first electrode 5 to be interposed between the first electrodes in the unit cell forming step. 5 is between the second electrode 8.

As described above, the first electrode terminal 11 and the second electrode terminal 12 are taken out onto the surface of the second electrode 8 or the surface of the first electrode 5, that is, the outside of the second substrate 6, by the dye-sensitized solar cell 1A. The surface 6b is on the outer surface 2b of the first substrate 2. Therefore, the dye-sensitized solar cell 1A in which a plurality of unit cells C are disposed on the same surface can obtain the effect that the first electrode terminal 11 and the second electrode terminal 12 can be easily taken out from each unit cell C.

Further, even when the dye-sensitized solar cell 1A is manufactured, the step of taking out the first electrode terminal 11 or the second electrode terminal 12 from each unit cell C can be incorporated into a process of forming a plurality of unit cells C on the same surface. Therefore, the following effects can be obtained: it can also be preferably applied to a continuous manufacturing method such as a roll-to-roll method.

Further, by the dye-sensitized solar cell 1A, for example, as shown in FIG. 5A and FIG. 5C, for example, the conductive tape T2 is attached to any unit cell C taken out to the outer surface 2b of the first substrate 2. For example, the second electrode terminal 12 of C can be attached to the first electrode terminal 11 of any of the unit cells C, C, ... taken out to the outer surface 6b of the second substrate 6 by the conductive tape T1. The unit cells C, C, . . . are connected in parallel, and the output of the dye-sensitized solar cell 1A can be easily and freely set.

Further, since the first electrode terminal 11 and the second electrode terminal 12 are taken out from the different openings 16 and 15, the first electrode terminal 11 and the second electrode terminal 12 can be placed at any position, for example, as in the present embodiment. Generally set at the same edge R1. Therefore, it is possible to obtain an effect that the dye-sensitized solar cell 1A can be easily and closely formed by concentrating the extracted portions of the electrode terminals in the respective batteries C.

(Second embodiment)

Next, a second embodiment of the present invention will be described with reference to Figs. 6A and 6B. In the second embodiment of the present invention, the same components and steps as those in the first embodiment are denoted by the same reference numerals, and the description of the components and the steps will be omitted. Only the configurations and steps different from the first embodiment will be described.

In the opening portion forming step of the dye-sensitized solar cell 1B of the present embodiment, a slit 21 is formed in the second electrode 8, and the slit 21 forms a tongue 20 constituting a part of the second electrode 8, and the tongue 20 is formed toward the opening. The outer surface 6b side of the second electrode 8 of the tongue piece 20 is folded back, and the second electrode terminal 12 is provided on the opposite conductive film 7, and the opposite conductive film 7 is formed on the surface of the folded-back tongue piece 20.

Further, the first electrode terminal 11 is taken out from the opening 22 formed by folding back the tongue piece 20, and the first electrode terminal 11 is connected to the first electrode 5 opposed to the opening 22.

According to the dye-sensitized solar cell 1B of the present embodiment, it is possible to form the opening 22 in any of the first electrode 5 or the second electrode 8, and therefore, the manufacturing process can be simplified. Moreover, the first electrode terminal 11 and the second electrode terminal 12 can be taken out to the outer surface 6b of the same second substrate 6, so that the conductive members T3 and T4 such as a conductive tape can be used. Simple and simple to make the unit battery C, C... connected in series or in parallel.

Further, as shown in FIG. 7 and FIG. 8, a plurality of electrode terminal pairs including the first electrode terminal 11 and the second electrode terminal 12 can be formed in one unit cell C by the method of the present embodiment, and The adjacent unit cells C and C (between the adjacent first unit cells and the second unit cells) are disposed such that the first electrode terminals 11 are adjacent to each other (electrode terminal pairs). Further, the second electrode terminals 12 may be provided adjacent to each other between the adjacent unit cells C and C (electrode terminal pairs). Further, the first electrode terminal 11 and the second electrode terminal 12 (electrode terminal pair) may be provided adjacent to each other between the adjacent unit cells C and C.

In this case, for example, the conductive tapes T5 and T5 are collectively adhered so that the entirety of the plurality of second electrode terminals 12 are electrically connected, or the conductive conductive tapes T5 and T5 are adhered in such a manner that only the two second electrode terminals 12 adjacent to each other are electrically connected. Tape T5, T5.

Further, the conductive tapes T6 and T6 are collectively adhered so that the entirety of the plurality of first electrode terminals 11 are electrically connected, or the conductive tape T6 is adhered so that only the two first electrode terminals 11 adjacent to each other are electrically connected. T6. Thereby, it is possible to obtain an effect that any one of the parallel connection and the direct connection can be freely selected between the adjacent unit cells C and C, and the connection can be easily performed.

Since the plurality of first electrode terminals 11 and the second electrode terminals 12 are taken out from one unit cell C, the following effects can be obtained: as shown in FIG. 8, the unit cells C and C to be connected can be freely selected, and the unit can be improved. The degree of freedom in the connection direction of the battery C.

In the dye-sensitized solar cell 1B, the unit cells C and C are insulated from each other until the first electrode terminal 11 and the second electrode terminal 12 between the unit cells C and C are connected by a conductive member. The connection method was selected after the production of the dye-sensitized solar cell 1B. because Therefore, the unit cell C can be freely cut out before the first electrode terminal 11 and the second electrode terminal 12 are connected, and the pigment having an arbitrary shape composed of one or a plurality of unit cells C and C can be obtained. The sensitized solar cell 1B is unitized.

Further, according to the second embodiment, when the first electrode terminal 11 and the second electrode terminal 12 are formed, when the tongue piece 20 is folded back, it is not necessary to always make the tongue from the surface of the tongue piece 20 and The opening 22 formed by folding back the sheet 20 takes out both the first electrode terminal 11 and the second electrode terminal 12.

In other words, the even array slits 21 may be formed in the second electrode 8, and the first electrode terminal 11 and the second electrode terminal 12 may be taken out from the different tongue pieces 20 or the opening portions 22, respectively. For example, as shown in FIG. 9, the second electrode terminal 12 is taken out from one of the tongues 20A (first tongue) which is folded back, and the first electrode is taken out from the opening portion 22A formed by the tongue piece 20A. In the terminal 11, the first electrode terminal 11 is taken out from the opening 22B formed when the other tongue 20B (second tongue) is folded back, and the second electrode terminal 12 is not taken out from the surface of the other tongue 20B.

Further, in the second embodiment, the slit 21 may be formed in the first electrode 5 or in either or both of the first electrode 5 and the second electrode 8.

When the slit 21 is formed in the first electrode 5, the tongue piece 20 is folded back on the outer surface of the first electrode 5 on which the tongue piece 20 is formed, and the first electrode terminal 11 is provided on the outer surface of the folded-back tongue piece 20. Further, the second electrode terminal 12 is taken out from the opening formed by the folding of the tongue piece 20, and the second electrode terminal 12 is connected to the second electrode 6 opposed to the opening.

In addition, the method of extracting the first electrode terminal 11 and the second electrode terminal 12 of the first embodiment and the method of extracting the first electrode terminal 11 and the second electrode terminal 12 of the second embodiment can be used to produce a coloring matter. Sensitize the solar cell.

In the above-described first and second embodiments, the unit cell C is formed in a rectangular shape. However, the shape of the unit cell C in the dye-sensitized solar cell 1B according to the embodiment of the present invention is not limited to a rectangular shape. That is, it can be preferably applied to a case where a unit cell C in which a circular or other polygonal shape is arranged or a dye-sensitized solar cell 1B having batteries C and C different in shape or size from each other is used in each unit cell. C takes out the first electrode terminal 11 and the second electrode terminal 12, and connects the adjacent unit cells C and C to each other.

According to the above, the present invention also exerts an advantageous effect that the shape of the battery C formed on the first substrate 2 and the second substrate 6 can be freely opened, and any unit cells C and C can be free from each other. Connect the ground and set the output freely.

(Third embodiment)

Hereinafter, a third embodiment of the present invention will be described.

Fig. 10 is a cross-sectional view schematically showing a third embodiment of the electric module.

In the third embodiment of the present invention, the same components as those in the first embodiment are denoted by the same reference numerals, and the description of the configuration is omitted, and only the configuration different from the first embodiment will be described.

In the dye-sensitized solar cell 1C of the present embodiment, the line L4 is formed on the second electrode 8 so as to divide the opposite conductive film 7, thereby insulating the adjacent conductive film 7 adjacent to each other. Further, in the direction parallel to the second substrate 6, the width W1 of the opposing conductive film 7 is smaller than the width W2 of the sealing material 9.

Further, the line L5 is formed on the first electrode 5 so as to divide the transparent conductive film 3, whereby the transparent conductive film 3 adjacent to each other is insulated by the line L5.

On the other hand, in the present embodiment, the openings 15 and 16 and the first electrode terminal 11 and the first The structure of the two electrode terminals 12 is the same as that of the first embodiment described above.

According to this configuration, in addition to the effects described in the first and second embodiments, even if the first substrate 2 and the second substrate 6 expand and contract, the size of the electrodes or the surfaces between the electrodes facing each other can be viewed from the top. When the relative position changes, the first electrode terminal 11 and the transparent conductive film 3 are also connected, and the second electrode terminal 12 and the opposite conductive film 7 are also connected, and the first electrode terminal 11 and the second electrode terminal 12 can be easily connected. It was taken out to the outside of the dye-sensitized solar cell 1C. Therefore, the dye-sensitized solar cell 1C in which the first electrode terminal 11 and the second electrode terminal 12 are taken out to the outside without considering the alignment of the two substrates can be easily realized.

Further, in the present embodiment, a plurality of lines L4 are formed on the opposite conductive film 7 so that the width W1 of the opposing conductive film 7 is smaller than the width W2 of the sealing member 9 in a direction parallel to the second substrate 6. Thereby, the opposite conductive film 7 is divided. The present invention is not limited to this configuration, and a plurality of lines L5 may be formed on the opposite conductive film 3 so that the width of the opposing conductive film 3 is smaller than the width W2 of the sealing material 9 in a direction parallel to the first substrate 5. Thereby, the opposite conductive film 3 is divided.

When the second electrode terminal 12 is connected to the opposite conductive film 7 and the first electrode terminal 11 is connected to the opposite conductive film 3, the position of the line L4 and the opening 15 are formed. The position (that is, the position of the first electrode terminal 11) may also overlap. Moreover, even in a configuration in which the width of the opposing conductive film 3 is smaller than the width W2 of the sealing material 9 in the direction parallel to the first substrate 5, the configuration in which the plurality of lines L5 are formed on the opposite conductive film 3 is used. When the second electrode terminal 12 is connected to the opposite conductive film 7 and the first electrode terminal 11 is connected to the opposite conductive film 3, the position of the line L5 and the position of the opening portion 16 (that is, the position of the second electrode terminal 12) Can also overlap.

Further, in the structure shown in Fig. 10, a space is formed between the adjacent conductive films 7 adjacent to each other at the position of the line L4, but it may be formed by insulating material in such a manner as to fill the space. Insulation.

Next, a method of manufacturing the dye-sensitized solar cell 1C will be described.

First, a plurality of first electrodes 5 are formed on the surface of the first substrate 5, and a plurality of second electrodes 8 are formed on the surface of the second substrate 6. The specific steps of forming the first electrode 5 and the second electrode 8 are the same as those described in the first embodiment. When a plurality of second electrodes 8 are formed, a plurality of lines L4 are formed on the opposite conductive film 7 so that the width W1 of the opposite conductive film 7 is smaller than the width W2 of the sealing material 9 formed later, and is divided by the line L4. The conductive film 7 is opposed.

Next, the first electrode 5 and the second electrode 8 are opposed to each other, and the first substrate 5 and the second substrate 6 are bonded to each other via the sealing material 9 . Specifically, the sealing material 9 is brought into contact with the opposite conductive film 3 so that the line L5 formed between the opposing conductive films 3 adjacent to each other in the first electrode 5 overlaps with the sealing material 9. Thereafter, the first substrate 5 and the second substrate 6 are bonded to each other so as to sandwich the sealing material 9 provided on the opposite conductive film 3.

The steps performed thereafter can be carried out in the same manner as in the first embodiment.

Further, in the method of manufacturing the dye-sensitized solar cell 1C, an insulating portion may be formed between the opposing conductive films 7 adjacent to each other or between the opposing conductive films 3 adjacent to each other. In this case, in addition to the steps of forming the first electrode 5 and the second electrode 8, the step of forming the insulating portion is also performed.

Further, in the above-described manufacturing method, the opposing conductive film 7 is divided by forming a plurality of lines L4 on the opposite conductive film 7 so that the width W1 of the opposing conductive film 7 is smaller than the width W2 of the sealing member 9. The invention is not limited to such a method. A plurality of lines L5 may be formed on the opposite conductive film 3 so that the width of the opposite conductive film 3 is smaller than the width W2 of the sealing material 9 in a direction parallel to the first substrate 5, thereby dividing the opposite conductive Membrane 3.

(Fourth embodiment)

Hereinafter, a fourth embodiment of the present invention will be described.

Fig. 11 is a cross-sectional view schematically showing a fourth embodiment of the electric module.

In the fourth embodiment of the present invention, the same components as those in the second and third embodiments are denoted by the same reference numerals, and the description of the configuration is omitted, and only the configuration different from the second embodiment will be described.

In the dye-sensitized solar cell 1D of the present embodiment, as described in the third embodiment, the width W1 of the opposing conductive film 7 is smaller than the width W2 of the sealing material 9 in the direction parallel to the second substrate 6. Further, as described in the second embodiment, the slit 21 forming the tongue piece 20 is formed on the second electrode 8, and the tongue piece 20 is folded back toward the outer surface 6b side of the second electrode 8 on which the tongue piece 20 is formed, and is formed into a film. The second electrode terminal 12 is provided on the opposite conductive film 7 on the surface of the folded-back tongue 20.

With such a configuration, in addition to the effects described in the first and second embodiments, even if the first substrate 2 and the second substrate 6 expand and contract, the size of the electrodes or the plan view between the electrodes facing each other is considered. The relative position of the first electrode terminal 11 and the second electrode terminal 12 can be easily taken out to the outside of the dye-sensitized solar cell 1D. Therefore, the dye-sensitized solar cell 1D in which the first electrode terminal 11 and the second electrode terminal 12 are taken out to the outside without considering the alignment of the two substrates can be easily realized.

The preferred embodiments of the present invention have been described above, and the foregoing description of the preferred embodiments of the present invention are intended to be construed as illustrative. Additions, omissions, substitutions, and other modifications may be made without departing from the scope of the invention. Therefore, the present invention should not be construed as being limited by the foregoing description The scope of the patent application is limited.

[Industry availability]

The present invention can be utilized in fields related to electrical modules such as solar cells.

1A‧‧‧Dye-sensitized solar cells (electrical modules)

2‧‧‧1st substrate

2a‧‧‧ board

2b‧‧‧External surface

3‧‧‧Transparent conductive film

3a‧‧‧ surface

4‧‧‧Semiconductor layer

5‧‧‧1st electrode

6‧‧‧2nd substrate

6a‧‧‧ board

6b‧‧‧External surface

7‧‧‧ opposite conductive film

8‧‧‧2nd electrode

9‧‧‧ Sealing material

10‧‧‧ electrolyte (electrolyte)

11‧‧‧1st electrode terminal

12‧‧‧2nd electrode terminal

15, 16‧‧‧ openings

C1‧‧‧ space

L1, L2‧‧‧ line

Claims (10)

An electric module having a plurality of unit cells disposed on the same surface, comprising: a first electrode; a second electrode disposed opposite to the first electrode; and the first electrode and the first electrode An electrolyte between the two electrodes, a first electrode terminal connected to the first electrode, and a second electrode terminal connected to the second electrode; and at least one of a first structure and a second structure, the first The structure is an opening provided through the first electrode in the thickness direction, and the second electrode terminal connected to the second electrode is taken out to the outer surface side of the first electrode; and the second structure is passed through the thickness direction. The first electrode terminal connected to the first electrode is taken out to the outer surface side of the second electrode through an opening provided through the second electrode. The electric module according to the first aspect of the invention, comprising: a first opening that penetrates the first electrode in a thickness direction; and a second opening that penetrates the second electrode in a thickness direction; and the first electrode in a plan view And the second electrode, wherein a position of the first opening and a position of the second opening are shifted from each other; and the first electrode terminal is taken out from the second opening; and the second electrode terminal is from the first opening take out. The electric module according to claim 1 or 2, wherein the first electrode terminal and the second electrode are viewed from a plan view of the first electrode and the second electrode The electrode terminals are formed at adjacent positions. The electric module according to claim 1 or 2, wherein the first electrode is formed with a slit forming a tongue, and the tongue is folded back on an outer surface of the first electrode on which the tongue is formed; The first electrode terminal is provided on an outer surface of the tongue; the second electrode terminal is taken out from an opening formed by folding the tongue, and the second electrode terminal is connected to a second electrode facing the opening. . The electric module according to claim 1 or 2, wherein the second electrode is formed with a slit forming a tongue; and the tongue is folded back on an outer surface of the second electrode on which the tongue is formed; The second electrode terminal is provided on an outer surface of the tongue; the first electrode terminal is taken out from an opening formed by the tongue being folded back, and the first electrode terminal is connected to the first electrode facing the opening. . The electric module according to claim 1 or 2, wherein the plurality of unit batteries are provided with a plurality of electrode terminal pairs including the first electrode terminal and the second electrode terminal, and the unit battery is taken out from the unit battery Electrode terminal pair. The electric module according to claim 1 or 2, wherein at least one pair of electrode terminals is provided between the first unit cell and the second unit cell adjacent to each other, and the pair of electrode terminals are provided in the above The first electrode terminal of the first unit cell and the first electrode terminal provided in the second unit cell, and the first electrode terminal is taken out from the first unit cell, and the first electrode terminal is taken out from the second unit cell 1 electrode terminal. The electric module according to claim 1 or 2, wherein at least one pair of electrode terminals is provided between the first unit cell and the second unit cell adjacent to each other, and the pair of electrode terminals are provided in the above The second electrode terminal of the first unit cell and the second electrode terminal provided in the second unit cell, and the second electrode terminal is taken out from the first unit cell, and the second electrode terminal is taken out from the second unit cell 2 electrode terminals. The electric module according to claim 1 or 2, wherein at least one pair of electrode terminals is provided between the first unit cell and the second unit cell adjacent to each other, and the pair of electrode terminals are provided in the above The first electrode terminal of the first unit cell and the second electrode terminal provided in the second unit battery, and the first electrode terminal is taken out from the first unit battery, and the first electrode terminal is taken out from the second unit battery 2 electrode terminals. An electric module comprising one or a plurality of unit cells formed by cutting an electrical module having a plurality of unit cells according to claim 1 or 2.