JP7359557B2 - Solar module and solar module management system - Google Patents

Description

The present invention relates to a solar cell module, a solar cell module management system, and a method for manufacturing a solar cell module.

Conventionally, see-through solar cell modules that can transmit a portion of sunlight in the thickness direction have been known.Since these see-through solar cell modules can transmit light, they can be used as transparent building materials such as windows. It is used for various purposes (for example, Patent Document 1).
Conventional see-through solar cell modules are made up of solar cells with large light-receiving surfaces, and utilize the space between adjacent solar cells to let in light.

Japanese Patent Application Publication No. 2001-339088

See-through solar cell modules generally use light received by the power generation portion of the solar cell, so the power generation portion is darker than the daylight portion. Therefore, because conventional see-through solar cell modules have a large power generation area, when used as a transparent building material such as a window, the power generation area becomes dark and stands out, and the design is impaired by the power generation area. Ta.

Therefore, in order to make the power generation portion of the solar cell less conspicuous, the present inventor prototyped a solar cell module using a solar cell with a small power generation portion. In other words, a solar cell panel that can generate electricity on its own is divided into strips by folding, these solar cells are connected with interconnectors to form a solar cell string, and these solar cell strings are arranged in a planar shape. We then prototyped a solar cell module connected with wiring members.
The prototype solar cell module has small strip-shaped solar cells arranged side by side, so even when the power generation area is dark, the distance between the daylight areas is narrow, allowing light to wrap around from the daylight areas, making the power generation area less noticeable than in the past. Ta.

However, a new problem arose with the prototype solar cell module.
In other words, when solar cells are subdivided, the number of solar cells to be mounted in one solar cell module increases, so if a problem such as an initial failure occurs, the problem will occur between the solar cell and the raw material. It was difficult to identify the relationship with the unfinished solar panels, making it difficult to provide feedback on defects.

Therefore, the present invention provides a solar cell that can identify the relationship between the specific solar cell in which the defect has occurred and the solar cell panel that is the raw material, when a defect such as an initial failure occurs in a specific solar cell. The present invention aims to provide a module, a solar cell module management system, and a method for manufacturing a solar cell module.

One aspect of the present invention to solve the above problem is to divide one or more in-progress solar panels capable of photoelectric conversion by connecting to an external load into a plurality of solar cells, and to divide the plurality of solar cells into multiple solar cells. A solar cell module that is electrically connected by a wiring member, and has an information display section, and the information display section is associated with the following solar cell information (1) or (2) or the solar cell information. This is a solar cell module that displays relevant information.
(1) Information on the in-process solar panel from which each solar cell is divided.
(2) Position information on the in-process solar battery panel before division of each solar battery cell.

According to this aspect, even if a problem such as an initial failure occurs in a specific solar cell, the information display section displays the solar cell information or related information associated with the information. The relationship between the generated specific solar cell and the in-process solar cell module can be specified. Therefore, it is easy to provide feedback such as identifying the cause of the problem.

A preferable aspect is that the information display section is a one-dimensional code or a two-dimensional code.

A preferable aspect is that the information display section is formed on the wiring member.

In a preferred aspect, the wiring member includes a first wiring member and a second wiring member, and the first wiring member connects the solar cells and connects the solar cell array extending in a predetermined direction. The second wiring member connects the solar cell rows and arranges the solar cell rows in a direction crossing the predetermined direction, and the information display section , which is formed on the second wiring member and displays related information associated with the solar cell information in each solar cell row.

A preferable aspect includes a first base material and a second base material, a plurality of solar cells are arranged between the first base material and the second base material, and the first base material and the second base material are arranged between the first base material and the second base material. The space between the two base materials is sealed with a sealing material, and the information display section is visible from the outside of the first base material with respect to the solar cell.

A preferable aspect is that the solar cell includes a position information display section that displays position information on the solar cell panel in progress before being divided.

A more preferable aspect is that the position information display section is formed at a position separate from the wiring member.

One aspect of the present invention is to manage a solar cell module, comprising a reading means for reading the related information from the information display section of the solar cell module described above, and a specifying means for specifying the solar cell information from the related information. It is a system.

According to this aspect, management of the solar battery cells becomes easy.

One aspect of the present invention includes a step of forming an in-process solar cell that forms an in-process solar cell panel capable of photoelectric conversion by connecting to an external load, and a step of forming an in-process solar cell panel by dividing the in-process solar cell panel into a plurality of parts to form solar cells. A solar cell forming step, a wiring connection step of electrically connecting the solar cells with a wiring member, and the following (1) or (2) solar cell information or a relationship associated with the solar cell information. This is a method of manufacturing a solar cell module, including an information display section forming step of forming an information display section that displays information.
(1) Information on the in-process solar panel from which each solar cell is divided.
(2) Position information on the in-process solar battery panel before division of each solar battery cell.

According to this aspect, since the information display part forming step is included to form the information display part, even if a problem such as an initial failure occurs in a particular solar cell, the information display part does not display the solar cell information or the relevant information. Since the related information associated with the information is displayed, the relationship between the specific solar cell in which the problem has occurred and the solar cell module in progress can be specified. Therefore, it is easy to provide feedback such as identifying the cause of the problem.

According to the solar cell module, the solar cell module management system, and the solar cell module manufacturing method of the present invention, when a defect such as an initial failure occurs in a specific solar cell, the specific solar cell in which the defect has occurred It is possible to specify the relationship between the cell and the solar cell panel that is the raw material.

FIG. 1 is a perspective view schematically showing an installation situation of a solar cell module according to a first embodiment of the present invention. FIG. 2 is a partially cutaway perspective view of the periphery of the solar cell module in FIG. 1. FIG. FIG. 2 is an exploded perspective view of the solar cell module of FIG. 1. FIG. FIG. 2 is a plan view of the solar cell module of FIG. 1, with the first transparent substrate omitted. 2 is an electrical circuit diagram of the solar cell module of FIG. 1. FIG. FIG. 2 is an explanatory diagram of the solar cell module of FIG. 1, in which (a) is a cross-sectional view of a spare solar cell string, and (b) is a cross-sectional view of a power generation side solar cell string. 4 is a perspective view of the solar cell of FIG. 3. FIG. 8 is a perspective view of the solar cell of FIG. 7 viewed from a different direction from that of FIG. 7. FIG. FIG. 8 is an explanatory diagram of the solar cell of FIG. 7, in which (a) is a plan view and (b) is a bottom view. 9A is an explanatory diagram of the solar cell in FIG. 9, (a) is a cross-sectional view taken along line AA in FIG. 9(b), and FIG. 9(b) is a cross-sectional view taken along line B-B in FIG. 9(b). FIG. 2 is an exploded perspective view of main parts of the solar cell module of FIG. 1. FIG. FIG. 5 is an explanatory diagram of the interconnector of FIG. 4, in which (a) is a perspective view of a straight interconnector, and (b) is a perspective view of a folded interconnector. FIG. 5 is a perspective view of the vicinity of the linear interconnector of the solar cell module of FIG. 4; FIG. 5 is a perspective view of the area around the folded interconnector of the solar cell module in FIG. 4; FIG. 5 is a perspective view of the area around the output wiring of the solar cell module in FIG. 4; FIG. 8 is an explanatory diagram of an in-process solar cell panel that is a raw material for the solar cell in FIG. 7, in which (a) is a plan view of the in-process solar cell panel, and (b) is a bottom view of the in-process solar cell panel. The cut portion is indicated by a two-dot chain line. FIG. 1 is a block diagram of a management system according to a first embodiment of the present invention. FIG. 2 is an explanatory diagram of a repair process of the solar cell module in FIG. 1, in which (a) is an electric circuit diagram of the solar cell module before repair, and (b) is an electric circuit diagram of the solar cell module after repair. FIG. 2 is an explanatory diagram of the repair process of the solar cell module in FIG. 1, in which (a) is a perspective view showing a state in which the lid part to be cut is removed, and (b) is a perspective view showing a state in which the interconnector is being cut. FIG. 3(c) is a perspective view showing the state of the interconnector after it has been cut. FIG. 2 is an explanatory diagram of the repair process of the solar cell module in FIG. 1, in which (a) is a perspective view showing a state in which a lid to be connected is removed, and (b) is a perspective view showing a state in which the lid is attached. (c) is a perspective view showing a state in which the lid is attached.

Embodiments of the present invention will be described in detail below.

As shown in FIG. 1, a solar cell module 1 according to a first embodiment of the present invention is mainly used as a wall construction material such as a window, and is attached to a frame member 100 that is mainly fixed to a wall, and is installed vertically. It is used in posture.
The solar cell module 1 is a double-sided see-through solar cell module, has a daylight function, and is capable of transmitting a portion of light in the thickness direction. Moreover, the solar cell module 1 is a double-sided solar cell module that can receive light on both the front and back sides to generate electricity.
The solar cell module 1 is managed by a management system 300 in each manufacturing process shown in FIG. 17.

As shown in FIGS. 2, 3, and 4, the solar cell module 1 includes a main body portion 2 and terminal boxes 3a, 3b. , which is connected to the external load 150 shown in FIG.

As shown in FIGS. 4 and 6, the main body part 2 includes a first transparent substrate 10 (first base material), a second transparent substrate 11 (second base material), and a plurality of main components. The solar cell string 12 (series connection group), the first lead-out wiring 14, the second lead-out wiring 15, and sealing materials 16a and 16b are provided. In the main body 2, a plurality of solar cell strings 12 and lead wires 14, 15 are arranged between two transparent substrates 10, 11, and the space between the transparent substrates 10, 11 is sealed. It is filled with materials 16a and 16b.

The solar cell module 1 of this embodiment is a double-sided solar cell module, so there is no front or back side, but in the following description, unless otherwise specified, the first transparent substrate 10 side is the front side. , the second transparent substrate 11 side will be explained as the back side.

As shown in FIG. 3, the light-transmitting substrates 10 and 11 are both plate-like members that extend in a planar manner, and in this embodiment, they have a rectangular shape. The light-transmitting substrates 10 and 11 are members having light-transmitting properties and insulating properties, and for example, a light-transmitting insulating substrate such as a glass substrate can be used.

As shown in FIG. 3, the first transparent substrate 10 is composed of a substrate body 20 and lid members 21a to 21f.
The substrate main body 20 has a plurality of through holes 22a to 22f passing through in the thickness direction.
The through holes 22a to 22f are working holes for cutting or connecting the wiring 14 taken out from the outside.
The lid members 21a to 21f are members that close the through holes 22a to 22f, and have the same or similar opening shapes to the through holes 22a to 22f.

On the other hand, unlike the first transparent substrate 10, the second transparent substrate 11 does not have through holes 22a to 22f formed therein.

The solar cell string 12 is composed of a plurality of solar cells 30, interconnectors 31a and 31b (conductors), a conductive adhesive 32, an insulating protection material 33, and a colored layer 34 as main components. , the respective solar cells 30 are electrically and physically connected in series via interconnectors 31a and 31b.
As shown in FIG. 3, the solar cell string 12 of this embodiment extends in a meandering manner between the light-transmitting substrates 10 and 11 when the first light-transmitting substrate 10 is viewed from above. An end thereof is a positive electrode side end 35, and the other end is a negative electrode side end 36.

As shown in FIG. 5, the solar cell string 12 of this embodiment includes power generation side solar cell strings 37a to 37e that are electrically connected in parallel to an external load 150, and electrically open to the external load 150. There is a spare solar cell string 38. That is, the solar cell module 1 of this embodiment is equipped with a spare solar cell string 38 that does not contribute to power generation during power generation.

The photovoltaic cell 30 is a photovoltaic cell obtained by cutting an in-progress solar cell panel 200 into strips, which can generate electricity by connecting to an external load 150, and is a vertically long rectangular small piece. That is, the solar cell 30 has a width in the horizontal direction X and extends in the vertical direction Y, as shown in FIG.
The solar cell 30 of this embodiment includes a first electrode layer 40, a photoelectric conversion section 41, and a second electrode layer 42, as shown in FIG.

The first electrode layer 40 is an electrode layer provided on the front side (first transparent substrate 10 side), and is composed of a base electrode layer 45 and a first collector electrode 46.
The base electrode layer 45 is an electrode layer that serves as a base for the first collector electrode 46 and is a conductive layer that extracts electricity from the photoelectric conversion section 41 . The base electrode layer 45 of this embodiment is made of a transparent conductive oxide such as indium tin oxide (ITO).
The first collector electrode 46 is a conductive layer partially laminated on the base electrode layer 45, and is composed of a busbar electrode section 50, first finger electrode sections 51a to 51e, and second finger electrode sections 52a to 52c. has been done.
The first collector electrode 46 is made of a material having higher conductivity than the base electrode layer 45, and in this embodiment, it is made of a metal such as gold, silver, aluminum, copper, palladium, or a metal alloy thereof. .

As shown in FIG. 7, the busbar electrode section 50 is an electrode section that is provided unevenly located closer to one end than the center in the longitudinal direction (vertical direction Y) and extends in the width direction (horizontal direction X).
As can be seen from FIGS. 13, 14, and 15, the bus bar electrode portion 50 is a portion that functions as a land to which the interconnectors 31a, 31b or the lead wires 14, 15 are connected via the conductive adhesive 32.
The width of the busbar electrode section 50 is preferably 1 mm or more and 8 mm or less.

The first finger electrode parts 51a to 51e are linear parts extending in the longitudinal direction (vertical direction Y) from the middle part of the bus bar electrode part 50 in the horizontal direction X, as shown in FIG.
The first finger electrode parts 51a to 51e are arranged in parallel at intervals in the horizontal direction X, and all reach near the ends in the vertical direction Y.
The width of the first finger electrode portions 51a to 51e is narrower than the width of the bus bar electrode portion 50, and is preferably 30 μm or more and 70 μm or less.

As shown in FIG. 7, the first finger electrode parts 51a to 51e have end electrode parts 54 and 55 at both ends in the longitudinal direction (vertical direction Y).
One end electrode part 54 is a part extending from the bus bar electrode part 50 to one end in the longitudinal direction, and the other end electrode part 55 is a second finger electrode part furthest from the bus bar electrode part 50 in the longitudinal direction. 52c to the other end in the longitudinal direction.
The terminal electrode part 54 has projecting parts 56a and 56b extending outward from the end of the base electrode layer 45, and the terminal electrode part 55 has projecting parts 56a and 56b projecting outward from the end of the base electrode layer 45. , 56b, which extend toward the opposite side.
Note that, in reality, the overhangs 56a, 56b, 57a, and 57b rarely occur, and even if they do occur, they hardly protrude. In this embodiment, for convenience of explanation, the overhangs 56a, 56b, 57a, and 57b will be described and expressed in an exaggerated manner.

As shown in FIG. 7, the terminal electrode section 55 is provided with a position information display section 58.
The position information display section 58 is a section that displays information on each solar cell 30 and/or related information associated with the information on each solar cell 30, and is a section that displays information on each solar cell 30 and/or related information associated with the information on each solar cell 30, and displays the in-process solar cell panel as the division source shown in FIG. 200 information and positional information on the in-process solar panel 200 before division can be displayed directly or indirectly.
As shown in FIG. 9, the position information display section 58 of this embodiment is configured by a part of the terminal electrode section 55 of the plurality of first finger electrode sections 51a, 51b, and 51d.
Specifically, an overhanging portion in the lateral direction X is provided on the terminal electrode portion 55 of the predetermined first finger electrode portions 51a, 51b, and 51d, and the cutting position in the solar cell panel 200 in progress is determined by the overhanging position of the overhanging portion. information is displayed. That is, the positions of the position information display sections 58 are different for each solar cell 30, and depending on the positional relationship, it is possible to display position information on the work-in-progress solar cell panel 200 before division.

As shown in FIG. 9, the second finger electrode parts 52a to 52c are linear parts that extend parallel to the bus bar electrode part 50 and orthogonally to the first finger electrode parts 51a to 51e.
The second finger electrode parts 52a to 52c are arranged in parallel at intervals in the vertical direction Y, and all reach near the ends in the horizontal direction X.
The widths of the second finger electrode portions 52a to 52c are all narrower than the width of the bus bar electrode portion 50, and are preferably 30 μm or more and 70 μm or less.

The photoelectric conversion unit 41 is a part that converts light energy into electrical energy.
The solar cell 30 of this embodiment is a crystal type solar cell, in which the photoelectric conversion section 41 has a semiconductor layer laminated on a semiconductor substrate, and has a PN junction between the semiconductor substrate and the semiconductor layer. ing.

The second electrode layer 42 is an electrode layer that forms a pair with the first electrode layer 40 and is provided on the back side (second transparent substrate 11 side), and as shown in FIG. It is composed of two collection electrodes 66.

The base electrode layer 65 is an electrode layer that serves as a base for the second collector electrode 66, and is a conductive layer that extracts electricity from the photoelectric conversion section 41. The base electrode layer 65 of this embodiment is made of a transparent conductive oxide such as indium tin oxide (ITO).

The second collector electrode 66 is a conductive layer partially laminated on the base electrode layer 65, and as shown in FIG. It is composed of parts 72a to 72c.
The second collector electrode 66 is made of a material having higher conductivity than the base electrode layer 65, and in this embodiment, it is made of a metal such as gold, silver, aluminum, copper, palladium, or a metal alloy thereof. .

The busbar electrode section 70 is an electrode section that is unevenly distributed toward one end of the center in the longitudinal direction (vertical direction Y) and extends in the width direction (horizontal direction X). It is provided on the opposite side to the section 50 and extends in the lateral direction X.
The busbar electrode portion 70 is a portion that functions as a land to which the lead wires 14 and 15 or the interconnectors 31a and 31b are connected via the conductive adhesive 32.
The width of the busbar electrode section 70 is preferably 1 mm or more and 8 mm or less.

The first finger electrode parts 71a to 71e are linear parts extending in the longitudinal direction (vertical direction Y) from the middle part of the bus bar electrode part 70 in the horizontal direction X, as shown in FIG.
The first finger electrode portions 71a to 71e are arranged in parallel at intervals in the horizontal direction X (width direction), and all reach near the ends in the vertical direction Y.
The width of the first finger electrode portions 71a to 71e is narrower than the width of the bus bar electrode portion 70, and is preferably 30 μm or more and 70 μm or less.

As shown in FIG. 9, the first finger electrode parts 71a to 71e have terminal electrode parts 74 and 75 at both ends in the longitudinal direction (vertical direction Y).
One end electrode part 74 is a part extending from the bus bar electrode part 70 to one end in the longitudinal direction, and the other end electrode part 75 is a second finger electrode part furthest from the bus bar electrode part 70 in the longitudinal direction. This is a portion extending from 72c to the other end in the longitudinal direction.

The second finger electrode parts 72a to 72c are linear parts that extend parallel to the bus bar electrode part 70 and orthogonally to the first finger electrode parts 71a to 71e.
The second finger electrode portions 72a to 72c are arranged in parallel at intervals in the vertical direction Y, and all reach near the ends in the horizontal direction X.
The widths of the second finger electrode portions 72a to 72c are all narrower than the width of the bus bar electrode portion 70, and are preferably 30 μm or more and 70 μm or less.

The interconnectors 31a and 31b are connection members that electrically and physically connect the solar cells 30 and 30 adjacent to each other in the horizontal direction X or the vertical direction Y.

The interconnector 31a (first wiring member) is a linear interconnector that connects two adjacent solar cells 30, 30 linearly in the vertical direction Y, as shown in FIGS. 12(a) and 13. It is.
The interconnector 31a includes a first connector part 80, a second connector part 81, and a first connection part 82 that connects the connector parts 80 and 81, as shown in FIG. 12(a).

As can be seen from FIGS. 12(b) and 14, the interconnector 31b (second wiring member) constitutes a folded portion of the solar cell string 12 when the first transparent substrate 10 is viewed from above, and This is a folded interconnector that connects two solar cells 30, 30 adjacent in direction X.
The interconnector 31b includes a third connector part 85, a fourth connector part 86, and a second connection part 87 that connects the connector parts 85 and 86, as shown in FIG. 12(b).

In the interconnector 31b, information display sections 88a and 88b are provided in the third connector section 85 and the fourth connector section 86, and information on the solar cells 30 in each column connected by the interconnector 31a can be displayed directly or indirectly. It is now possible to display
The information display sections 88a and 88b indicate in-progress solar panels from which each solar cell 30 in a row of solar cells 30 (hereinafter also referred to as a solar cell row) connected in the vertical direction Y by an interconnector 31a is divided. 200 information and position information of each solar cell 30 in the solar cell row in the work-in-progress solar panel 200 before division, the solar cell information can be displayed directly or indirectly.
The information display sections 88a and 88b of this embodiment are one-dimensional codes or two-dimensional codes that are related information linked to solar cell information, and are read by a reading section 305 of a reading device 302 to be described later. It is possible to read information on the solar battery cell 30.

The conductive adhesive 32 is an adhesive that electrically and physically connects the busbar electrode parts 50, 70 and the interconnectors 31a, 31b, or the busbar electrode parts 50, 70 and the lead wires 14, 15, and is conductive and It has adhesive properties.
In this embodiment, the conductive adhesive 32 is a conductive adhesive film in which a conductive adhesive is provided on both sides of the conductive film.

The insulation protection material 33 is an insulation protection layer that has insulation properties and covers and protects the longitudinal end face of the solar cell 30, as shown in FIG.
The insulating protection material 33a buries the protruding parts 56a, 56b of the terminal electrode part 54, and can prevent contact between the protruding parts 57a, 57b and the interconnector 31a. The projecting portions 57a, 57b of the portion 55 are buried, thereby making it possible to prevent contact between the projecting portions 57a, 57b and the interconnector 31b.

The colored layer 34 is a layer colored in a different color from the interconnector 31a, and is a layer that covers a part of the interconnector 31a as shown in FIG.
The colored layer 34 has a similar color to the color of the solar cell 30, and is colored closer to the color of the solar cell 30 than the color of the interconnector 31a.

The extraction wirings 14 and 15 are wirings for extracting electricity from each solar cell string 12 to the outside of the main body 2 .
The output wiring 14 is a positive electrode side wiring whose one end is connected to the positive electrode side end 35 of each solar cell string 12, and whose other end is electrically connected to the cable member 6a within the terminal box 3a. This is the wiring that will be used.
As shown in FIG. 5, the extraction wiring 14 includes a main body wiring section 90 connected to the terminal box 3a, and a branch wiring branching from the end of the main body wiring section 90 toward the positive electrode side end 35 of each solar cell string 12. It includes sections 91a to 91f.
Among the branch wiring sections 91a to 91f, the branch wiring section 91a connected to the spare solar cell string 38 is partially cut off, and forms a disconnection section 92 (broken section). That is, the branch wiring section 91a is divided into the main body wiring section 90 side and the spare solar cell string 38 side.

The output wiring 15 is a negative electrode side wiring whose one end is connected to the negative electrode side end 36 of each solar cell string 12, and the other end is electrically connected to the cable member 6b within the terminal box 3b. This is the wiring that will be used.
The output wiring 15 includes a main body wiring part 95 connected to the terminal box 3b, and branch wiring parts 96a to 96f branching from the end of the main body wiring part 95 toward the negative electrode side end 36 of each solar cell string 12. ing.

The sealing materials 16a and 16b are light-transmitting adhesives that bond between the light-transmitting substrates 10 and 11 as shown in FIG. and seal it.
The sealing materials 16a and 16b of this embodiment are insulating resin sheets, specifically, EVA (ethylene vinyl acetate copolymer resin) sheets.

The terminal boxes 3a, 3b have cable members 6a, 6b and box parts 7a, 7b, and the lead wires 14, 15 connected to the solar cell string 12 are connected inside the box part 7. .

Next, the positional relationship of each member of the solar cell module 1 of this embodiment will be explained.

As shown in FIG. 3, the transparent substrates 10 and 11 are arranged to face each other, and sealing materials 16a and 16b are laminated on two opposing surfaces. Each solar cell string 12 is placed between the transparent substrates 10 and 11, and is embedded in the sealants 16a and 16b.
Each solar cell string 12 extends in the vertical direction Y as a whole and is lined up in the horizontal direction X, as shown in FIG.

The opening of the through hole 22a (preparation side through hole) of the first transparent substrate 10 is the disconnection part of the branch wiring part 91a connected to the preliminary solar cell string 38 when the first transparent substrate 10 is viewed from above. It overlaps with 92. That is, the disconnection part 92 of the branch wiring part 91a is arranged at a position where it is exposed from the through hole 22a when the cover member 21a is removed.

The openings of the through holes 22b to 22f (power generation side through holes) of the first transparent substrate 10 are branch wirings connected to the power generation side solar cell strings 37a to 37e when the first transparent substrate 10 is viewed from above. It overlaps with sections 91b to 91f. That is, the branch wiring portions 91b to 91f are arranged at positions exposed from the through holes 22b to 22f when the cover members 21b to 21f are removed.

The busbar electrode parts 50 and 70 extend in the width direction (lateral direction X) of the interconnectors 31a and 31b.
In the linear interconnector 31a, as shown in FIG. 13, the first connector part 80 is connected to the busbar electrode part 50 of the first collector electrode 46 of one solar cell 30a via the conductive adhesive 32, and the first The second connector portion 81 is connected to the bus bar electrode portion 70 of the second collector electrode 66 of another solar cell 30b via the conductive adhesive 32.
In the linear interconnector 31a, when viewed from above, the first connector portion 80 overlaps with the terminal electrode portion 54 of the first finger electrode portions 51a to 51e of one solar cell 30a, and the second connector portion 81 overlaps with the terminal electrode portion 54 of the first finger electrode portions 51a to 51e of one solar cell 30a. The terminal electrode portions 74 of the first finger electrode portions 71a to 71e of the solar cell 30b overlap with each other.

As shown in FIG. 13, the linear interconnector 31a has an outer surface covered with a colored layer 34 having a color different from that of the interconnector 31a, and an exposed portion 84 exposed from the colored layer 34 is formed in a part.
The exposed portion 84 of the linear interconnector 31a is connected to the busbar electrode portions 50 and 70 via the conductive adhesive 32.
The colored layer 34 is provided spanning from above the linear interconnector 31a to above the solar cell 30.

In the folded interconnector 31b, as shown in FIG. 14, the third connector part 85 is connected to the bus bar electrode part 70 of the second collector electrode 66 of one solar cell 30c via the conductive adhesive 32, and 4 connector section 86 is connected to the bus bar electrode section 50 of the first collector electrode 46 of another solar cell 30d via the conductive adhesive 32.
In the folded interconnector 31b, when viewed from above, the third connector portion 85 overlaps with the end electrode portion 74 of the first finger electrode portions 71a to 71e of one solar cell 30c, and the fourth connector portion 86 overlaps with the terminal electrode portion 74 of the first finger electrode portions 71a to 71e of one solar cell 30c. It overlaps with the end electrode portion 54 of the first finger electrode portions 51a to 51e of the solar cell 30d.

As shown in FIG. 15, one end of the lead wiring 14 is connected to the bus bar electrode portion 50 of the first collecting electrode 46 of the solar cell 30 via a conductive adhesive 32. When viewed from above, the output wiring 14 overlaps the end electrode portion 54 of the first finger electrode portions 51a to 51e of the solar cell 30 near one end. Similarly, one end of the output wiring 15 is connected to the busbar electrode portion 70 of the second collector electrode 66 of the solar cell 30 via the conductive adhesive 32 . When viewed from above, the output wiring 15 overlaps the end electrode portion 74 of the first finger electrode portions 71a to 71e of the solar cell 30 near one end.

The insulating protection material 33 covers the end face of the solar cell 30 so that the protruding parts 56a, 56b, 57a, 57b of the first finger electrode parts 51b, 51d, 51b, 51e are buried therein.

As shown in FIG. 14, the position information display section 58 of the solar cell 30 does not overlap the interconnectors 31a, 31b and is located away from the interconnectors 31a, 31b. That is, the position information display section 58 is not hidden by the interconnectors 31a and 31b, but is exposed to the outside.
In the interconnector 31a, a portion between the solar cells 30, 30 to be connected and adjacent in the vertical direction Y has a color closer to the color of the solar cell 30 than the color of the interconnectors 31a, 31b due to the colored layer 34. It is colored.

As shown in FIGS. 1 and 2, the frame member 100 is a member that covers the four sides of the main body portion 2 and the terminal boxes 3a and 3b, and is a square ring-shaped holding member when viewed from the front.
The frame member 100 includes a first cover 101 that covers the first transparent substrate 10 side of the main body 2, a second cover 102 that covers the second transparent substrate 11 side of the main body 2, and a first cover 102 that covers the second transparent substrate 11 side of the main body 2. It has an end cover part 103 that connects the part 101 and the second cover part 102 and covers the end face of the main body part 2, and the first cover part 101 and the second cover part 102 each have openings 105a and 105b. There is.

As shown in FIG. 2, the frame member 100 surrounds the terminal boxes 3a and 3b, and further covers each side of the main body portion 2.
In the frame member 100, the first covering portion 101 extends over the through holes 22a to 22f and the lid members 21a to 21f so that the lid members 21a to 21f do not come off from the through holes 22a to 22f. That is, the through holes 22a to 22b are hidden by the frame member 100 and are substantially invisible when viewed from the front.

Next, the configuration of the in-process solar battery panel 200, which is the raw material for the solar battery cell 30, will be explained.

The in-process solar cell panel 200 is a solar cell panel that is a raw material when manufacturing the solar cell 30, and is a work-in-progress product of the solar cell 30.
As shown in FIG. 16(a), the in-process solar cell panel 200 has busbar electrode parts 201a, 201b, a first finger electrode part 202a, and a second collector electrode 204a on one main surface (front surface) side. It includes finger electrode sections 203a to 203c, and is further provided with a panel information display section 205.

On the other hand, as shown in FIG. 16(b), the in-process solar cell panel 200 has busbar electrode parts 201c and 201d as a second collector electrode 204b on the other main surface (back surface) side, and a first finger electrode part 202b, It has second finger electrode parts 203d to 203f.
Then, the in-process solar cell panel 200 connects wiring members (not shown) to each of the busbar electrode parts 201a, 201b and the busbar electrode parts 201c, 201d, and connects them to the external load 150 via the wiring members. It can generate electricity when it receives light such as light.

The busbar electrode portion 201a is a portion that will become the busbar electrode portion 50 after cutting, and the busbar electrode portion 201d is a portion that will become the busbar electrode portion 70.

The first finger electrode portion 202a is a portion that becomes the first finger electrode portions 51a to 51e after cutting, and the first finger electrode portion 202b is a portion that becomes the first finger electrode portions 71a to 71e.

The first finger electrode section 202a is provided with a position information display section 207 corresponding to the position information display section 58 after cutting.
The second finger electrode parts 203a to 203c are the parts that become the second finger electrode parts 52a to 52c after cutting, and the second finger electrode parts 203d to 203f become the second finger electrode parts 72a to 72c after cutting. This is the part that becomes.

The panel information display section 205 directly or indirectly displays management information of the solar cell panel 200 in progress. The panel information display section 205 of this embodiment is a two-dimensional code, and by reading it with an external terminal, information about the solar cell panel 200 in progress can be displayed on an external device.

Next, the management system 300 that manages the solar cell module 1 will be explained.

As shown in FIG. 17, the management system 300 includes a control device 301 and a reading device 302 (reading means) connected wirelessly or by wire.
In the management system 300 of this embodiment, a control device 301 and a reading device 302 can communicate with each other via a network 303 such as the Internet or an intranet.

The control device 301 includes a specifying section 310 (specific means), a collating section 311, a storage section 312, and an input/output section 313, and when receiving information about the solar cell 30 from the reading device 302, The collating unit 311 collates the information about the solar cells 30 in each column stored in the storage unit 312 and the received information, and the specifying unit 310 can specify the solar cells 30 in each column.

The reading device 302 includes a reading section 305 and an input/output section 306, and the reading section 305 reads information display sections 88a and 88b provided on the interconnector 31b to read each column connected by the interconnector 31a. Information about the solar cells 30 can be transmitted to the control device 301.

Next, a method for manufacturing the solar cell module 1 will be explained.

First, an in-process solar cell forming process is performed in which an in-process solar cell panel 200 capable of photoelectric conversion is formed by connecting to an external load 150. Note that manufacturing of the in-process solar cell panel 200 formed in the in-process solar cell forming process is almost the same as that of a conventional solar cell panel, and is well known, so this process will be briefly described.

Semiconductor layers are formed on both sides of the semiconductor substrate using a CVD apparatus or the like to form a photoelectric conversion section 41, and base electrode layers 45 and 65 are formed on both sides of the photoelectric conversion section 41 using a CVD apparatus or the like. Then, collector electrodes 204a and 204b are formed on each base electrode layer 45 and 65 by screen printing or the like, thereby forming a solar cell panel 200 in progress.

At this time, a panel information display section 205 and a position information display section 207 are formed on the front side.
In addition, the control device 301 of the management system 300 associates the position information display section 207 of each solar cell 30 with the division position of the in-process solar panel 200 and stores it in the storage section 312. It is possible to check the division positions of the solar cell 30 and the solar cell panel 200 in progress.

Subsequently, a solar cell string process for forming the solar cell string 12 is performed.
Specifically, as shown by the two-dot chain line in FIG. 16, the solar cell panel 200 in progress is cut so that the intermediate portion in the longitudinal direction of the first finger electrode portions 202a and 202b is divided, and a plurality of solar cells 30 are cut. The photovoltaic cell 30 is formed by dividing the photovoltaic cell into two (cell dividing step, photovoltaic cell forming step).
Specifically, the inner part of the bus bar electrode part 201b and the outer part of the bus bar electrode part 201a are divided into equal intervals in the horizontal direction Divide each.
The dividing method is not particularly limited.
In this embodiment, the division is performed by so-called folding, and the semiconductor substrate of the photoelectric conversion unit 41 is cut by irradiating a laser from the second electrode layer 42 side, and is divided by being bent along the cut. .

A fluid insulating protective material 33 is applied to the longitudinal ends of the divided solar cells 30, and as shown in FIG. , 57b are buried in the insulation protection material 33 (coating process).

Then, one end side of the interconnectors 31a and 31b is connected to the busbar electrode portion 50 of one solar cell 30 via the conductive adhesive 32 (wiring connection step), and then the busbar electrode portion of the other solar cell 30 is connected. The other ends of interconnectors 31a and 31b are connected to 70 (second wiring connection step).
Note that the wiring connection process may be performed simultaneously with the second wiring connection process, or may be performed before the second wiring connection process.

A fluid coloring material is applied to the portion between one solar cell 30 and the other solar cell 30 of the linear interconnector 31a, and the color is closer to the color of the solar cell 30 than the color of the linear interconnector 31a. A colored layer 34 is formed (coloring step).
At this time, the coloring material is applied to the exposed portion of the linear interconnector 31a, and further applied from above the linear interconnector 31a to above the solar cell 30, and cured.

Further, in a separate process, information display sections 88a and 88b are formed on the connector sections 85 and 86 of the folded interconnector 31b as shown in FIG. 12(b). Then, the division position in the in-process solar battery panel 200 is checked from the position information display unit 58 of each solar battery cell 30, and the division position in the in-process solar battery panel 200 is checked between the information display units 88a and 88b and the position of each solar battery cell 30 and the division in the in-process solar battery panel 200. Link the positions (information display section formation process).

Output wiring 14, 15 is connected to each solar cell string 12, and each solar cell string 12 is electrically connected to terminal boxes 3a, 3b, and sandwiched between two transparent substrates 10, 11 with sealing material 16a. , 16b.

Next, a method for repairing the solar cell module 1 of the first embodiment will be explained. Note that the following description will be made on the assumption that an abnormality has occurred in the power generation side solar cell string 37a due to a failure or the like.

First, as shown in FIG. 18, the branch wiring section 91b connected to the failed power generation side solar cell string 37a is cut.
Specifically, as shown in FIG. 19(a), remove the lid member 21b that overlaps the branch wiring part 91b, and insert a special jig through the through hole 22b to cut the branch wiring part 91b, as shown in FIG. 19(b). and is cut off within the through hole 22b.

Subsequently, as shown in FIG. 19(c), the lid member 21b is reattached to the through hole 22b to close the through hole 22b. That is, the lid member 21b is placed so as to cover the cut portion of the branch wiring portion 91b.

In a separate process, as shown in FIG. 20(a), the lid member 21a that overlaps with the branch wiring section 91a connected to the spare solar cell string 38 is removed, and as shown in FIGS. 20(b) and 20(c), A connecting lid member 110 is attached to the through hole 22a to close the through hole 22a.
At this time, the connection lid member 110 is provided with a conductive foil 111 (connection member) on the solar cell 30 side, and the conductive foil 111 connects the disconnected portion 92 of the branch wiring portion 91a. That is, as shown in FIG. 18(b), the portion of the branch wiring portion 91a on the solar cell 30 side and the portion on the main body wiring portion 90 side are electrically connected by the conductive foil 111 of the connection lid member 110.
The conductive foil 111 of the connection lid member 110 is not particularly limited as long as it has conductivity. For the conductive foil 111, for example, metals or metal alloys such as gold, silver, copper, platinum, palladium, etc. can be used.

According to the solar cell module 1 of the first embodiment, each power generation side solar cell string 37a is electrically opened to the external load 150 outside the sealing materials 16a and 16b as shown in FIG. 18(a), Spare solar cell string 38 can be electrically connected to external load 150 . Therefore, even if one power generation side solar cell string 37a does not generate power due to a failure or the like, the power generation side solar cell string 37a is electrically disconnected from the external load 150 as shown in FIG. By connecting the solar cell string 38 to the external load 150, power can be generated with the designed power generation capacity.

According to the solar cell module 1 of the first embodiment, the branch wiring parts 91b to 91f of the power generation side solar cell strings 37a to 37e are exposed from the openings of the power generation side through holes 22b to 22f, and the spare solar cell string 38 There is a disconnection part 92 in a part of the branch wiring part 91a, and the disconnection part 92 is exposed from the opening of the spare side through hole 22a. Therefore, by cutting a part of the first branch wiring part 91b and electrically connecting the disconnected part 92 of the branch wiring part 91a, it is easy to connect the solar cell string 12 used for power generation from the power generation side solar cell string 37a. It can be changed to a spare solar cell string 38.

According to the solar cell module 1 of the first embodiment, the solar cell is arranged such that the projecting parts 56a, 56b, 57a, and 57b forming the ends of the terminal electrode parts 54 and 55 of the first finger electrode parts 51a to 51e are buried. Since the insulating protection material 33 is formed on the end face of the cell 30, the overhanging parts 56a, 56b, 57a, and 57b forming the ends of the terminal electrode parts 54 and 55 of the first finger electrode parts 51a to 51e are connected to the interconnector 31a. , 31b can be prevented.

According to the solar cell module 1 of the first embodiment, since a part of the interconnector 31a is covered with the colored layer 34 which is closer to the color of the solar cell 30 than the interconnector 31a, the color of the interconnector 31a is It can be brought close to the battery cells 30, and the color of the interconnector 31a is less noticeable.

According to the solar cell module 1 of the first embodiment, since the colored layer 34 is provided over the interconnector 31a and over the solar cell 30, the colored layer 34 adheres between the interconnector 31a and the solar cell 30. It also functions as a material, and the interconnector 31a is difficult to peel off from the solar cell 30.

According to the solar cell module 1 of the first embodiment, even if a specific solar cell 30b has a malfunction such as an initial failure, the information display sections 88a and 88b display the information associated with the solar cell information. Since the information is displayed, the relationship between the specific solar cell 30b in which the problem has occurred and the solar cell panel 200 in progress can be specified. Therefore, it is easy to provide feedback such as identifying the cause of the problem.

According to the solar cell module 1 of the first embodiment, the information display parts 88a and 88b are visible from the outside in the thickness direction with respect to the solar cell 30 through the first transparent substrate 10 and the sealing material 16a. It is. Therefore, the positions of the information display sections 88a and 88b can be easily confirmed, and the information display sections 88a and 88b can be read by the reading section 305 from the outside of the first transparent substrate 10.

According to the solar cell module 1 of the first embodiment, in addition to the information display sections 88a and 88b, each solar cell 30 is provided with a position information display section 58 that displays position information on the in-process solar cell panel 200 before division. Therefore, the positional information of the solar cell 30 can be specified even after the interconnectors 31a and 31b are removed from the solar cell 30.

According to the solar cell module 1 of the first embodiment, since the positional information display section 58 is formed at a position away from the linear interconnector 31a, even when the linear interconnector 31a is connected, the positional information display section 58 can be visually recognized, and positional information on the solar cell panel 200 in progress before the solar cell 30 is divided can be specified.

According to the repaired solar cell module 1 repaired by the repair method of the first embodiment, the solar cell module looks substantially the same as before repair.

According to the management system 300 of the first embodiment, the reading section 305 reads information related to the solar cell information from the information display sections 88a and 88b of the solar cell module 1, and the identifying section 310 reads the solar cell information from the related information. can be specified, so a large number of solar cell modules 1 can be managed at once during manufacturing. Furthermore, even if a specific solar cell 30b has a problem such as an initial failure, the relationship between the specific solar cell 30b and the in-process solar panel 200 can be specified. Therefore, it is easy to provide feedback such as identifying the cause of the problem.

In the first embodiment described above, when repairing, a part of the extraction wiring 14 connected to the solar cell string 12 in which an abnormality has occurred is cut, and the solar cell string 12 in which the abnormality has occurred is separated from other solar cell strings 12. Although electrically separated, the present invention is not limited to this. The solar cell string 12 in which the abnormality has occurred may be electrically separated from the other solar cell strings 12 by cutting the interconnectors 31a and 31b that constitute the solar cell string 12 in which the abnormality has occurred.

In the embodiment described above, the solar cells 30 are arranged in the vertical direction Y, but the present invention is not limited thereto. The solar cells 30 may be arranged in the horizontal direction X or diagonally.

In the first embodiment described above, the disconnection portion 92 was provided in the lead wiring 14 connected to the positive electrode side end portion 35 of the spare solar cell string 38, but the present invention is not limited to this. A disconnection portion 92 may be provided in the extraction wiring 15 connected to the negative electrode side end portion 36 of the spare solar cell string 38. Similarly, in the second embodiment, the connection circuit 421 is provided inside the terminal box 403a, but the present invention is not limited thereto. A connection circuit 421 may be provided within the terminal box 3b.

In the embodiment described above, the solar cell 30 has a vertically long rectangular shape, but the present invention is not limited to this, and the shape of the solar cell 30 is not particularly limited.
The solar cell 30 may have a substantially square shape, as in the conventional case, or may have a polygonal shape such as a triangle, a quadrangle, a pentagon, or a hexagon. Moreover, it may be circular or elliptical.

In the embodiment described above, the conductive adhesive 32 was bonded only to the busbar electrode parts 50 and 70, but the present invention is not limited to this. The conductive adhesive 32 may be provided over the first finger electrode sections 51, 71 and the base electrode layers 45, 65 from above the bus bar electrode sections 50, 70 toward the outer end.

In the embodiment described above, the connection lid member 110 electrically connects the disconnected portion 92 with the conductive foil 111, but the present invention is not limited to this, and the disconnected portion 92 is electrically connected. The shape of the connecting member is not particularly limited. The connecting member may be plate-shaped or linear.

In the embodiments described above, each component can be freely replaced or added between the embodiments as long as it is within the technical scope of the present invention.

1,400 Solar cell module 10,410 First transparent substrate (first base material)
11 Second transparent substrate (second base material)
12 Solar cell string 16a, 16b Sealing material 30, 30a to 30d Solar cell 31a Straight interconnector (first wiring member)
31b Folded interconnector (second wiring member)
58 Position information display section 80 First connector section 81 Second connector section 82 First connection section 85 Third connector section 86 Fourth connector section 87 Second connection section 88a, 88b Information display section 150 External load 200 In-process solar panel 207 Position information display unit 300 Management system 301 Control device 302 Reading device (reading means)
305 Reading section 306 Input/output section 310 Specification section (specification means)

Claims (7)

One or more in-process solar cell panels capable of photoelectric conversion by connecting to an external load are divided into a plurality of solar cells, and a plurality of solar cell rows are provided in which the plurality of solar cells are electrically connected in series. A solar cell module in which a plurality of solar cell rows are electrically connected by a second wiring member,
It has an information display section,
The information display section is formed on the second wiring member,
The information display section is a solar cell module that displays the following solar cell information (1) or (2) or related information associated with the solar cell information.
(1) Information on the in-process solar cell panel from which each solar cell in the solar cell array connected to the second wiring member is divided.
(2) Position information on the in-process solar cell panel before division of each solar cell in the solar cell row connected to the second wiring member . The solar cell module according to claim 1, wherein the information display section is a one-dimensional code or a two-dimensional code. One or more in-process solar cell panels capable of photoelectric conversion by connecting to an external load are divided into a plurality of solar cells, and a plurality of solar cell rows are provided in which the plurality of solar cells are electrically connected in series. A solar cell module in which a plurality of solar cell rows are electrically connected by a second wiring member,
It has an information display section,
The information display section displays the following solar cell information (1) or (2) or related information associated with the solar cell information,
The second wiring member connects the solar cell rows and arranges the solar cell rows in a direction intersecting the extending direction of the solar cell rows ,
The second wiring member has a plurality of information display sections, and each of the plurality of information display sections displays related information associated with the solar cell information in each connected solar cell row. module.
(1) Information on the in-process solar panel from which each solar cell in the solar cell row is divided.
(2) Position information of each solar cell in the solar cell row in the in-process solar panel before division. It has a first base material and a second base material, a plurality of solar cells are arranged between the first base material and the second base material, and the first base material and the second base material The space between the two is sealed with a sealing material,
The solar cell module according to any one of claims 1 to 3 , wherein the information display section is visible from the outside of the first base material with respect to the solar cell. The solar cell module according to any one of claims 1 to 4 , wherein the solar cell includes a position information display section that displays position information on the in-process solar cell panel before division. The solar cell module according to claim 5 , wherein the position information display section is formed at a position separate from the second wiring member. Reading means for reading the related information from the information display section of the solar cell module according to any one of claims 1 to 6 ;
A management system for solar cell modules, comprising specifying means for specifying the solar cell information from the related information.

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