KR101295541B1 - Solar cell module and mehtod for manufacturing the same - Google Patents

Abstract

The present invention relates to a solar cell module, wherein the solar cell module includes a first electrode connected to a substrate of a first conductivity type, a second electrode connected to an emitter part of a second conductivity type opposite to the first conductivity type, and the second electrode. A plurality of current collectors connected to a first electrode, a second current collector connected to the second electrode, a first connection part connected to the first current collector, and a second connection part connected to the second current collector At least one insulating portion extending in the first direction and overlapping with a portion of the adjacent solar cells, and positioned above the insulating portion and adjacent in the second direction opposite to the first direction. And at least one third connection part connecting the first connection part and the second connection part respectively positioned in the solar cell. This reduces the manufacturing cost of the solar cell module, simplifies the process, and improves the production efficiency of the solar cell module.

MWT, solar cell, ribbon, solar cell module, series connection

Description

SOLAR CELL MODULE AND MEHTOD FOR MANUFACTURING THE SAME

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

With the recent depletion of existing energy resources such as oil and coal, interest in alternative energy to replace them is increasing. Among them, solar cells produce electric energy from solar energy, and they are attracting attention because they have abundant energy resources and there is no problem about environmental pollution.

Typical solar cells have a substrate made of different conductivity type semiconductors, such as p-type and n-type, an emitter layer, and electrodes connected to the substrate and the emitter, respectively. At this time, a p-n junction is formed at the interface between the substrate and the emitter.

When light is incident on the solar cell, a plurality of electron-hole pairs are generated in the semiconductor, and the generated electron-hole pairs are separated into electrons and holes charged by the photovoltaic effect, respectively, and the electrons and holes are n-type. Move toward the semiconductor and the p-type semiconductor, for example toward the emitter portion and the substrate, collected by electrodes electrically connected to the substrate and the emitter portion, and connected to the wires to obtain power.

In this case, at least one current collector such as a bus bar connected to the emitter unit and the electrode connected to the substrate may be positioned on the emitter unit and the substrate, and the charge collected from the electrode may be transferred to the outside through an adjacent current collector. Make it easy to move to the connected load.

However, in this case, since the current collector is located not only on the substrate on which the light is not incident but also on the side where the light is incident, that is, on the emitter part formed on the light receiving surface, the incident area of light is reduced due to the current collector, thereby increasing the efficiency of the solar cell. Falls.

Therefore, to reduce the efficiency of solar cells due to current collectors, metal wrap through (MWT) solar cells, electrons and holes are placed at the back of the substrate opposite the light receiving surface. Background Art A back contact solar cell or the like has been developed in which all electrodes to be transferred are positioned on the rear side of a substrate.

A plurality of solar cells of these structures are connected to form a solar cell module. At this time, by connecting the current collector formed in each solar cell in series or parallel form by using the connection portion to complete the electrical connection between the solar cells.

The technical problem to be achieved by the present invention is to reduce the manufacturing time of the solar cell module.

Another technical problem to be achieved by the present invention is to improve the production efficiency of the solar cell module.

According to an aspect of the present invention, a solar cell module includes a first electrode connected to a substrate of a first conductivity type, a second electrode connected to an emitter part of a second conductivity type opposite to the first conductivity type, and a first electrode connected to the first electrode. A plurality of solar cells including a first current collector connected to the second current collector, a second current collector connected to the second electrode, a first connection portion connected to the first current collector, and a second connection portion connected to the second current collector. And at least one insulator extending in a first direction and overlapping a portion of the solar cells arranged adjacently, and positioned adjacent to the second in a second direction opposite to the first direction. And at least one third connection part connecting the first connection part and the second connection part respectively positioned in the battery.

The solar cell module according to the above feature further includes at least one fourth connection part disposed on the insulation part and connecting the first connection part and the second connection part respectively positioned in the solar cells disposed adjacent to each other in the first direction. can do.

The fourth connection part may be positioned on an insulation part disposed at the outermost part of the solar cell module.

The first to fourth connection portions may be printed patterns using conductive materials or formed of conductive tapes.

When the third and fourth connection portions are formed of a conductive tape, the conductive tape may have an uneven surface.

The uneven surface may be formed in a direction in which light is incident.

The solar cell module according to the above features may further include a filler positioned on the rear sheet and the rear sheet, and the solar cell and the insulation may be positioned on the filler.

The first connection portion extends beyond the first end of the solar cell so that a portion of the first connection portion is positioned over the insulation.

The second connection portion may extend beyond a second end portion opposite the first end portion, such that a portion of the second connection portion is positioned over the insulation.

Preferably, the width of the third and fourth connectors is greater than or equal to a portion of the first connector and a portion of the second connector.

The first current collector and the second current collector may be located on a surface of the substrate facing the light receiving surface.

Arrangements of the first connection part and the second connection part respectively disposed in the solar cells disposed adjacent to the second direction may be the same.

The arrangement shape of the first connection portion and the second connection portion positioned in the solar cells disposed adjacent to the first direction may be 180 ° rotationally symmetrical.

A solar cell module manufacturing method according to another aspect of the present invention is a plurality of aspects each having a first current collector for transmitting the first charge transferred from the substrate and a second current collector for transferring the second charge transferred from the emitter A method of manufacturing a solar cell module comprising a cell, the method comprising: forming a solar cell array by forming a plurality of insulating portions overlapping a portion of an adjacent solar cell, printing a conductive material on the solar cell and the insulating portion, and At least one first and second connection parts respectively positioned on the first current collector and the second current collector, and at least one of the first and second connection parts respectively positioned on adjacent solar cells and positioned on the insulating part. Forming third and fourth connections of said photovoltaic cell; placing said solar cell array on a back sheet; Disposing a filler, disposing a transparent member on the filler, and performing a laminating process by applying heat and pressure.

According to still another aspect of the present invention, there is provided a method of manufacturing a solar cell module including a plurality of first collectors for transferring first charges transferred from a substrate, and a plurality of second collectors for transferring second charges from an emitter. A method of manufacturing a solar cell module including a solar cell, the method comprising: forming a plurality of insulating portions overlapping a portion of an adjacent solar cell to form a solar cell array, and attaching the conductive tape on each solar cell, wherein each solar cell Forming a first connection portion and a second connection portion respectively positioned on the first current collector portion and the second current collector portion of the substrate; printing a conductive material on the plurality of insulation portions, and respectively positioned on adjacent solar cells. Forming at least one third connecting portion and at least one fourth connecting portion connecting the first and second connecting portions, on the back sheet And arranging the solar cell array, disposing a filler on the solar cell array, disposing a transparent member on the filler, and performing a laminating process by applying heat and pressure.

According to still another aspect of the present invention, there is provided a method of manufacturing a solar cell module including a plurality of first collectors for transferring first charges transferred from a substrate, and a plurality of second collectors for transferring second charges from an emitter. A method of manufacturing a solar cell module comprising a solar cell, the method comprising: forming a plurality of insulating portions overlapping a portion of an adjacent solar cell to form a solar cell array, printing the conductive material on each solar cell, and each solar cell Forming a first connection portion and a second connection portion respectively positioned on the first current collector portion and the second current collector portion of the substrate; and attaching a conductive tape to the plurality of insulating portions, respectively, and positioned on adjacent solar cells. Forming at least one third connecting portion and at least one fourth connecting portion connecting the first and second connecting portions, on the back sheet And arranging the solar cell array, disposing a filler on the solar cell array, disposing a transparent member on the filler, and performing a laminating process by applying heat and pressure.

The conductive material may be printed by direct printing or indirect printing.

The third connector may connect first and second connectors positioned in solar cells disposed adjacent to each other in a first direction.

The fourth connectors may connect first and second connectors respectively positioned in solar cells disposed adjacent to each other in a second direction opposite to the first direction.

According to this feature, the manufacturing cost of the solar cell module is reduced, the process is simplified, and the production efficiency of the solar cell module is improved.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

In the drawings, the thickness is enlarged to clearly represent the layers and regions. Like parts are designated with like reference numerals throughout the specification. When a layer, film, region, plate, or the like is referred to as being "on" another portion, it includes not only the case directly above another portion but also the case where there is another portion in between. Conversely, when a part is "directly over" another part, it means that there is no other part in the middle. Also, when a part is formed as "whole" on the other part, it means not only that it is formed on the entire surface (or the front surface) of the other part but also not on the edge part.

Next, a solar cell module and a manufacturing method thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings.

First, a solar cell according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3.

1 is a partial perspective view of a solar cell according to an embodiment of the present invention, FIG. 2 is a rear view of the solar cell shown in FIG. 1, and FIG. 3 shows the solar cell shown in FIG. 1 along line II-II. It is sectional drawing cut out.

Referring to FIG. 1, a solar cell 1 according to an exemplary embodiment of the present invention may include a substrate 110 having a plurality of via holes 181, and an emitter portion located at the substrate 110. 120, the anti-reflection film 130 and the anti-reflection film 130 are not positioned on the emitter portion 120 of the surface of the substrate 110 on which light is incident (hereinafter, referred to as “front surface”). A plurality of first electrodes 140 (hereinafter referred to as 'front electrodes') positioned on the emitter portion 120 on the front surface of the substrate, and the surface of the substrate 110 facing the front surface without incident light [ Hereinafter, a plurality of second electrodes (hereinafter, referred to as "rear electrodes") 150 positioned on a "rear surface" are spaced apart from the plurality of rear electrodes 150, A plurality of front electrode current collectors 161 (hereinafter, referred to as 'first houses') are located in the emitter unit 120 located around each via hole 181 and the via hole 181. All)), then A plurality of rear electrode current collectors 162 (hereinafter referred to as 'second current collectors') positioned at regular intervals on the electrode 150, and between each rear electrode 150 and the substrate 110 below it. A plurality of back surface field (BSF) portions 170 are provided.

The substrate 110 is a semiconductor substrate of a first conductivity type, for example, silicon of p-type conductivity type. In this case, the silicon may be monocrystalline silicon, a polycrystalline silicon substrate, or amorphous silicon. When the substrate 110 has a p-type conductivity type, it contains an impurity of a trivalent element such as boron (B), gallium, indium, or the like. However, unlike this, the substrate 110 may be of an n-type conductivity type, or may be made of a semiconductor material other than silicon. When the substrate 110 has an n-type conductivity type, the substrate 110 may contain impurities of pentavalent elements such as phosphorus (P), arsenic (As), antimony (Sb), and the like.

The substrate 110 includes a plurality of via holes 181 penetrating through the substrate 110 and has a texturing surface that is textured to have a textured surface. The plurality of via holes 181 are formed in the substrate 110 at a portion where the plurality of front electrodes 140 and the plurality of first current collectors 161 intersect with each other.

The emitter portion 120 is an impurity portion having a second conductivity type, for example, an n-type conductivity type, which is opposite to the conductivity type of the substrate 110, and forms a p-n junction with the semiconductor substrate 110.

Due to this built-in potential difference due to the pn junction, electron-hole pairs, which are charges generated by light incident on the substrate 110, are separated into electrons and holes, and the electrons move toward the n-type and the holes Moves toward p-type. Therefore, when the substrate 110 is p-type and the emitter section 120 is n-type, the separated holes move toward the substrate 110, and the separated electrons move toward the emitter section 120, Becomes a majority carrier, and the electrons in the emitter section 120 become a majority carrier.

 Since the emitter portion 120 forms a pn junction with the substrate 110, unlike the present embodiment, when the substrate 110 has an n-type conductivity type, the emitter portion 120 has a p-type conductivity type. . In this case, the separated electrons move toward the substrate 110 and the separated holes move toward the emitter part 120.

When the emitter section 120 has an n-type conductivity type, the emitter section 120 dopes impurities of pentavalent elements such as phosphorus (P), arsenic (As), antimony (Sb) And may be formed by doping an impurity of a trivalent element such as boron (B), gallium, indium or the like into the substrate 110 when the conductive type has a p-type conductivity.

An antireflection film 130 made of a silicon nitride film (SiNx), a silicon oxide film (SiO ₂ ), or the like is formed on the emitter portion 120 on the front surface of the substrate. The anti-reflection film 130 reduces the reflectivity of light incident on the solar cell 1 and increases the selectivity of a specific wavelength region, thereby increasing the efficiency of the solar cell 1. The anti-reflection film 130 may have a thickness of about 70 nm to 80 nm. In an alternative embodiment, the anti-reflection film 130 may also be located on the sidewalls of the via holes 181. The anti-reflection film 130 may be omitted as necessary.

The emitter portion 120 includes an exposed portion 182 that exposes a portion of the rear surface of the substrate 110. Electrical connection between the emitter unit 120 that moves and collects electrons or holes and the front electrode 140 and the rear electrode 150 that collects holes or electrons by the exposed part 182 is broken, so that the electrons and holes move. It is done smoothly. Although not shown in FIG. 1, the anti-reflection film 130 and the emitter portion 120 thereunder may be exposed portions (not shown) to expose a portion of the front edge of the substrate 110 for edge isolation of the substrate 110. Not used).

The plurality of front electrodes 140 are electrically connected to the emitter unit 120 on the emitter unit 120 formed on the front surface of the substrate, extend in a predetermined direction to be spaced apart from each other, and form a via hole 181 located below. Covering.

Each front electrode 140 collects charges, for example, electrons, which are moved toward the emitter unit 120, and transfers the electrons to the corresponding first current collector 161 that is electrically connected through the via hole 181.

The plurality of front electrodes 140 are made of at least one conductive material, and examples of the conductive materials include nickel (Ni), copper (Cu), silver (Ag), aluminum (Al), tin (Sn), and zinc ( Zn), at least one selected from the group consisting of indium (In), titanium (Ti), gold (Au), and combinations thereof, but may be made of other conductive metal materials.

The plurality of rear electrodes 150 are spaced apart from the first current collector 161 adjacent to the rear surface of the substrate 110 and electrically connected to the substrate 110. The back electrode 150 collects charge, for example, holes, moving toward the substrate 110.

The plurality of rear electrodes 150 is made of at least one conductive material. Conductive materials include nickel (Ni), copper (Cu), silver (Ag), aluminum (Al), tin (Sn), zinc (Zn), indium (In), titanium (Ti), gold (Au) and their It may be at least one selected from the group consisting of a combination, but may be made of another conductive metal material.

A plurality of first current collectors 161 are positioned on the rear surface of the substrate 110 to be spaced apart from the rear electrode 150. As illustrated in FIG. 2, the first current collector 161, also called a bus bar, has a shape extending substantially parallel to the rear electrode 150 in a direction crossing the front electrode 140 disposed thereon. . Therefore, the rear electrode 150 and the first current collector 161 are alternately disposed on the rear surface of the substrate 110.

The first current collector 161 is also made of at least one conductive material, and the first current collector 161 is connected to the front electrode 140 that crosses each other through the via hole 181. Therefore, since the first current collector 161 is electrically connected to the front electrode 140, the first current collector 161 is electrically connected to the external electrode.

Examples of conductive materials include nickel (Ni), copper (Cu), silver (Ag), aluminum (Al), tin (Sn), zinc (Zn), indium (In), titanium (Ti), gold (Au) and It may be at least one selected from the group consisting of a combination thereof, but may be made of other conductive materials. In the present embodiment, the plurality of first current collectors 161 include the same material as the front electrode 140 but may include different materials.

A plurality of second current collectors 162 made of a conductive material and positioned substantially parallel to the first current collector 161 are positioned on the plurality of rear electrodes 150.

Each second current collector 162 includes a plurality of pads 1621 arranged at regular intervals.

Each pad 1621 has a circular shape, but is not limited thereto, and may have an elliptical shape or a polygonal shape such as a quadrangle. In FIG. 2, the number of pads 1621 constituting one second current collector 162 is five, but this is only one example, and the pads 1621 constituting one second current collector 162 are illustrated in FIG. The number and size vary depending on the size and shape of the back electrode 150.

However, in an alternative embodiment, the second current collector 162 may have an integral shape, such as a square shape, similar to the first current collector 161.

The second current collector 162 outputs charges, for example, holes, transmitted from each of the electrically connected rear electrodes 150 to an external device.

A plurality of rear electric field units 170 are positioned between the plurality of rear electrodes 150 and the substrate 110. The plurality of backside electric fields 170 are regions in which impurities of the same conductivity type as the substrate 110 are doped at a higher concentration than the substrate 110, for example, n + regions.

The potential barrier is formed due to the difference in the impurity concentration between the substrate 110 and the backside electric field 170, which hinders the movement of holes toward the backside of the substrate 110. Reduce the likelihood

In the solar cell 1 according to the present exemplary embodiment having the structure as described above, the first current collector 161 is positioned on the rear surface of the substrate 110 to which light is not incident, and the substrate is formed using a plurality of via holes 181. An MWT solar cell in which the front electrode 140 positioned on the front surface of the 110 is connected to the first current collector 161, and its operation is as follows.

When light is irradiated to the solar cell 1 and incident on the substrate 110 of the semiconductor through the anti-reflection film 130 and the emitter part 120, electron-hole pairs are generated in the substrate 110 of the semiconductor by light energy. At this time, since the surface of the substrate 110 is a texturing surface, the light reflectivity at the front surface of the substrate 110 is reduced, and incident and reflection operations are performed on the texturing surface, so that light is trapped inside the solar cell. Since it is increased, the efficiency of the solar cell is improved. In addition, the reflection loss of the light incident on the substrate 110 by the anti-reflection film 130 is reduced, so that the amount of light incident on the substrate 110 increases.

These electron-hole pairs are separated from each other by a pn junction of the substrate 110 and the emitter portion 120 so that the electrons move toward the emitter portion 120 having an n-type conductivity type, and the holes form a p-type conductivity type. The substrate 110 moves toward the substrate 110. As such, the electrons moved toward the emitter unit 120 move to the first current collector 161 that is collected by the front electrode 140 and electrically connected through the via hole 181, and moves to the substrate 110. Is collected by the corresponding rear electrode 150 through the adjacent rear electric field 170 and moves to the second current collector 162. When the first current collector 161 and the second current collector 162 are connected with a conductive wire, a current flows, which is used as power from the outside.

This solar cell 1 can be used alone, but for more efficient use, a plurality of solar cells 1 having the same structure are connected in series to form a solar cell module.

Next, an example of a solar cell module according to an embodiment of the present invention will be described with reference to FIGS. 4 to 6.

4 is a schematic perspective view of a solar cell module according to an embodiment of the present invention, FIG. 5 is a view showing an example of a connection state of the solar cell shown in FIG. 4, and FIG. 6 is shown in FIG. 4. It is a figure which shows the other example of the connection state of a solar cell.

First, referring to FIGS. 4 and 5, a solar cell module 20 according to an embodiment of the present invention will be described.

4 and 5, the solar cell module 20 according to the present embodiment is disposed on a back sheet 210, a back sheet 210, and a plurality of connectors 23, 23a, and 24. Lower filler 220 having a, a plurality of solar cells 1 disposed on the lower filler 220 and connected to the connection, the upper filler 230, the upper filler 230 disposed on the plurality of solar cells (1) A transparent member 240 positioned above, and a frame 250 for storing the components thereof.

The rear sheet 210 protects the embedded solar cell 1 from the external environment by preventing moisture from penetrating from the rear of the solar cell module 20.

The back sheet 210 may have a multilayer structure such as a layer for preventing moisture and oxygen penetration, a layer for preventing chemical corrosion, and a layer having insulation properties.

The lower and upper fillers 220 and 230 are encapsulate materials to prevent corrosion of the metal due to moisture penetration and to protect the solar panel 10 from impact. The fillers 220 and 230 may be made of a material such as ethylene vinyl acetate (EVA).

The transparent member 230 positioned on the upper filler 230 has a high transmittance and is made of tempered glass to prevent breakage. At this time, the tempered glass may be a low iron tempered glass having a low iron content. The transparent member 230 may be embossed on the inner surface in order to enhance the light scattering effect.

The plurality of solar cells 1 are arranged in a matrix structure, and each solar cell 1 is connected in series by first to fourth connecting portions 21 to 24. In FIG. 5, the solar cells 1 arranged on the lower filler material 220 have a 4 × 4 matrix structure, but the present invention is not limited thereto, and the number of the solar cells 1 arranged in the row and column directions as needed is It is adjustable.

Except for the solar cells 1 located in the first or last column of the first and last rows, the first collector 161 of each solar cell 1 is the second collector 162 of the adjacent solar cell 1. )

Next, the connection relationship of the solar cell 1 will be described in more detail with reference to FIG. 5.

As shown in FIG. 5, the solar cell module 20 includes a plurality of first connection portions 21 and a plurality of second current collectors respectively positioned on the plurality of first current collectors 161 of each solar cell 1. A plurality of second connecting portions 22 respectively positioned on the 162, a plurality of insulating portions 31 overlapping a portion of the rear surface of the adjacent solar cell 1, a plurality of third and third portions disposed on the plurality of insulating portions 31, and Fourth connection parts 23, 23a, 24 are provided.

The first and second connectors 21 and 22 are connected to each other by the third and fourth connectors 23, 23a and 24.

5, the arrangement shape of the 1st and 2nd connection parts 21 and 22 of the solar cell 1 located in the same row is the same.

However, the arrangement shapes of the first and second connectors 21 and 22 of the solar cells 1 located in different rows adjacent to each other are different from each other. That is, the arrangement shape of the first and second connectors 21 and 22 of the solar cell 1 is different from the arrangement shape of the first and second connectors 21 and 22 of the solar cell 1 immediately adjacent to the same column. different.

 For example, as shown in FIG. 5, the arrangement shape of the first and second connecting portions 21, 22 of the solar cells 1 arranged in adjacent rows is 180 ° rotationally symmetrical, whereby the first and The connection relationship of the 2nd connection parts 21 and 22 is mutually opposite. Thus, in the same row, two arrangement shapes are placed alternately. Referring to FIG. 5, in two adjacent solar cells 1 in the odd-numbered rows, the first connection 21 of the front solar cell 1 and the second connection 22 of the rear end solar cell 1 are formed. In the two adjacent solar cells 1 in the even-numbered rows, while connected by three connectors 23, the second connector 22 of the front solar cell 1 and the first connector of the rear end solar cell 1 ( 21 is connected by a third connecting portion 23.

Therefore, the arrangement shape and the connection state of the first and second connecting portions 21 and 22 will be described based on the solar cell 1 located in the odd-numbered row.

The first connection portion 21 is positioned along the first current collector 161 on each first current collector 161.

In this case, the width of each first connection portion 21 is greater than or equal to the width of each first current collector 161, thereby improving contact force and charge transfer ability with the first current collector 161. However, the present invention is not limited thereto, and the width of the first connection portion 21 may be smaller than the width of each first current collector 161.

In addition, the length of each first connecting portion 21 is longer than the length of the first current collector 161. At this time, the length of the first connecting portion 21 extends almost straight in one of the left direction and the right direction of the first current collector 161 and extends to the outside of the solar cell 1. That is, one end of the first connecting portion 21 is formed beyond one end of the solar cell 1 . Referring to FIG. 5, the first connector 21 extends in the right direction and extends beyond the right end of the solar cell 1.

On the other hand, referring to the other end of the first connecting portion 21, FIG. 5, the left end is substantially the same position as the left end of the first current collecting part 161, but It may not reach or exceed the left end. However, the present invention is not limited thereto, and the shape and the formation position of the first connection part 21 may be variable.

As already explained, since the arrangement shape of the first connection portion 21 of the solar cells 1 arranged in the adjacent row is 180 ° rotationally symmetrical, the first connection portion 21 of the solar cell 1 arranged in the even row is It extends beyond the left end of the solar cell 1.

The second connection portion 22 is made of a conductive tape, like the first connection portion 21. The second connecting portion 22 is positioned almost straight on the second current collecting portion 162. As a result, the plurality of pads 1621 positioned in the same second current collector 162 are electrically connected to each other by one second connector 22.

In this case, the width of each of the second connectors 22 may be greater than or equal to the width of each pad 1621 to improve charge transfer capability, but the present invention is not limited thereto and may be smaller than the width of each pad 1621.

In addition, when the length from the first pad 1621 located at the front of the second current collector 162 to the last pad 1621 located at the last is the total length of the second current collector 162, each second connection portion The length of 22 is longer than the total length of the second current collector 162. At this time, the length of the second connector 22 extends in a direction substantially opposite to the direction in which the first connector 21 extends, and in a straight line in the right direction with reference to FIG. 5 and extends to the outside of the solar cell 1. That is, similarly to the 1st connection part 21, the edge part of the said 2nd connection part 22 in the corresponding direction is formed beyond the edge part of the said solar cell 1 arrange | positioned in the same direction.

Also, similarly to the first connecting portion 21, the other end of the second connecting portion 22, referring to FIG. 5, the right end of the second connecting portion 22 is the rightmost pad 1621 disposed on the rightmost side. May be substantially at the same position as the right end of the pad, but less than or beyond the right end of the rightmost pad 1621. However, the present invention is not limited thereto, and the shape and the formation position of the first connection part 21 may be variable.

As already explained, since the arrangement shape of the second connecting portions 22 of the solar cells 1 arranged in adjacent rows is 180 ° rotationally symmetrical, the second connecting portions 22 of the solar cells 1 arranged in the even rows are It extends beyond the right end of the solar cell 1.

The first and second connections 21, 22 are conductive patterns patterned using a conductive material containing a conductive material, or are thin with a string shape with a conductive material, commonly referred to as a ribbon. It consists of a conductive tape which is a metal plate strip. Examples of conductive materials include nickel (Ni), copper (Cu), silver (Ag), aluminum (Al), tin (Sn), zinc (Zn), indium (In), titanium (Ti), gold (Au) and It may be at least one selected from the group consisting of a combination thereof, but may be made of other conductive materials.

The plurality of insulation portions 31 extend substantially parallel to the solar cells 1 adjacent in the direction intersecting the first and second connection portions 21 and 22, for example, in the column direction, so that each solar cell Two insulation portions 31 are arranged on both sides of the column. In addition, with the exception of the insulators 31 located at the beginning and the end of the solar cell module 20, the insulators 31 are formed of adjacent solar cells 1 between two adjacent solar cells 1 in the row direction. Overlap with some The insulation 31 located at the beginning of the solar cell module 20 overlaps with a portion of the solar cell 1 adjacent to the right direction, and the insulation 31 located at the end of the solar cell module 20 is It overlaps with a part of solar cell 1 adjacent to a left direction.

The plurality of insulating parts 31 may be made of an insulating material such as polyimide, and may have an insulating tape shape having adhesive force on at least one surface thereof.

In addition, the plurality of insulation portions 31 have a rectangular shape long in the vertical direction, and each insulation portion 31 has a first connection portion 21 or a second connection portion (not drawn out of each solar cell 1). 22) do not overlap. In the present embodiment, the width of each insulation portion 31 is a value obtained by adding an overlap size overlapping with the solar cell 1 adjacent to the gap between the solar cell 1 and the solar cell 1, and may be at least 3 mm. have. That is, the distance between the solar cell 1 and the solar cell 1 is at least about 2 mm, and the overlapping distance of the adjacent solar cells 1 is at least about 0.5 mm. Each of the insulating parts 31 overlaps with the adjacent solar cell 1 so as not to overlap with the first current collecting part 161 and the second current collecting part 162 formed in the adjacent solar cell 1. In addition, the length of each insulation portion 31 may be shorter or the same as the length of the solar cell module 20a,

The third and fourth connectors 23, 23a, and 24 electrically connect the first connector 21 and the second connector 22 of two adjacent solar cells 1. The third connectors 23 and 23a are connected to at least one of the first connector 21 and the second connector 22 of the solar cell 1 positioned in the same row, and the fourth connector 24 is a different row. The first connecting portion 210 and the second connecting portion 22 are located at.

The third connector 23 is positioned between two solar cells 1 adjacent to each other in the row direction and intersects with the first and second connectors 21 and 22, for example, in the Y-axis direction. (1) It overlaps with the 1st connection part 21 and the 2nd connection part 22 which protrude outside.

However, as shown in FIG. 5, for example, the third connector 23a disposed adjacent to the solar cell 1 located in the first column of the first row overlaps only the second connector 22, The third connector 23a disposed adjacent to the solar cell 1 positioned in the first column of the last row overlaps only the first connector 21.

In the present embodiment, the lengths of the third connectors 23 and 23a are preferably equal to or shorter than the lengths of the adjacent solar cells 1. For this reason, it does not overlap with the 1st and 2nd connection parts 21 and 22 which protrude outside the solar cell 1 arrange | positioned in the adjacent row.

The solar cells 1 positioned in the same row by such third connecting portions 23 and 23a have a series connection.

The fourth connector 24 is for connecting the solar cells 1 located in the other row in series.

Therefore, the fourth connection part 24 is connected to the outermost part of the solar cell 1, that is, the solar cell module 20 arranged in the first row and the last column except the solar cell 1 connected to the third connection part 23a. Of the solar cells 1 arranged, they overlap with the first connecting portion 21 and the second connecting portion 22 of the two solar cells 1 adjacent in the longitudinal direction.

To this end, the fourth connectors 24 are arranged on the left or right side of the two adjacent solar cells 1 in the longitudinal direction, in the first and last columns, in different rows drawn out of each adjacent solar cell 1. The first connecting portion 21 and the second connecting portion 22 are positioned.

In addition, in the present embodiment, the widths of the third and fourth connectors 23, 23a, and 24 are smaller than the widths of the insulators 31, and the first connectors 21 and the first connectors 21 positioned on the insulators 31 are formed. It is better to be equal to or larger than the distance between the two connecting portions 22. When the widths of the third and fourth connectors 23, 23a and 24 are greater than the width of the insulating unit 31, the third and fourth connectors 23, 23a and 24 may contact the first and second connectors 21 and 22 formed inside the adjacent solar cell 1. Anxiety arises. In addition, when the widths of the third and fourth connectors 23, 23a, and 24 are smaller than the distance between the first connector 21 and the second connector 22 positioned on each insulation 31, the solar cell 1 The electrical connection between the first connecting portion 21 and the second connecting portions 21 and 22 drawn to the outside is not made.

The third connecting portions 23 and 23a and the fourth connecting portions 24 disposed on the insulating portion 31 are conductive patterns patterned using conductive materials, like the first and second connecting portions 21 and 22. It is made of a conductive tape such as a ribbon.

When the first and second connectors 21 and 22 and the third and fourth connectors 23 to 24 are formed of different materials, that is, formed of a conductive material and a conductive tape, the first and second connectors ( In order to improve the contact force between the 21 and 22 and the third and fourth connectors 23, 23a and 24, the first and second connectors 21 and 22 and the third and fourth connectors 23, 23a and 24 are used. An adhesive member containing at least one of a solder, a conductive adhesive, a conductive epoxy, and a conductive metal particle may be further provided therebetween.

When the third connecting portion 23, 23a and the fourth connecting portion 24 are made of a conductive tape, the third and fourth connecting portions 23, 23a, and 24 may be used to improve the operating efficiency of the solar cell module 20. By increasing the reflectance, the amount of light reincident to the adjacent solar cell 1 can be increased.

To this end, the third and fourth connectors 23, 23a, and 24 may have a textured surface whose surface in the direction in which light is incident is an uneven surface. The texturing surfaces of these third and fourth connections 23, 23a, 24 are similar to the texturing effects of the substrate 110. Accordingly, the light incident on the third and fourth connectors 23, 23a and 24 is repeatedly incident and reflected on the texturing surfaces of the third and fourth connectors 23, 23a and 24, so that the adjacent solar cell 1 ), The efficiency of the solar cell 1 is increased, and as a result, the efficiency of the solar cell module 20 is also improved.

The plurality of solar cells 1 disposed in the solar cell module 20 by the first to fourth connection parts 21 to 24 are connected in series, and in the case of FIG. 5, the solar cells are located in the first column of the first row. The solar cells 1 located in the first column of the last row from the cells 1 are connected in series in a zigzag form. In addition, the third connector 23a is connected to an external device (not shown) through a wiring (not shown) formed separately from the back sheet 210.

Next, with reference to FIG. 6, another example of the connection state of the solar cell 1 in the solar cell module 20 according to an embodiment of the present invention will be described.

In comparison with FIG. 5, the same reference numerals as in FIG. 5 are assigned to the same parts, and detailed description thereof will be omitted.

As shown in Fig. 6, in this example, the connection relationship between the solar cell 1 and the third and fourth connection portions 23, 23a, 24 has a structure substantially similar to the connection relationship shown in Fig. 5.

That is, each solar cell 1 includes a plurality of first connectors 21 positioned on the first collector 161 and a plurality of second connectors 22 disposed on the second collector 162 of each solar cell 1. And the third and fourth connectors 23, 23, and 24 connected to the first and second connectors 21 and 22, respectively, on the plurality of insulation parts 31a and 31b overlapping the adjacent solar cells 1. ) Is located.

However, in comparison with FIG. 5, the arrangement shape of the first and second connectors 21 and 22 and the first and second connectors 21 and 22, and the third and the third connectors of the solar cell 1 illustrated in FIG. 6. The connection relationship with the 4 connection part 23, 23a, 24 differs, and the shape of the some insulation part 31a, 31b differs.

That is, the extending directions of the first connecting portion 21 and the second connecting portion 22 are opposite to those shown in FIG. 5.

For example, in the odd-numbered rows, the first connector 21 extends beyond the right end of the solar cell 1, and the second connector 22 extends beyond the left end of the solar cell 1. It is extended.

Thus, unlike FIG. 5, in the two adjacent solar cells 1 in the odd-numbered rows, the second connection 22 of the front solar cell 1 and the first connection 21 of the rear end solar cell 1 In the two adjacent solar cells 1 of the even-numbered row, while connected by a third connector 23, the first connector 21 of the front solar cell 1 and the second connector of the rear solar cell 1 The 22 is connected by the 3rd connection part 23. As shown in FIG.

In addition, the plurality of insulation portions 31a and 31b are adjacent to each other in the column direction with the plurality of insulation portions 31a where the third connection portions 23 and 23a connecting the solar cells 1 adjacent in the row direction are positioned. The 4th connection part 24 which connects (1) is divided into the some insulation part 31b in which each is located.

That is, the insulation part 31a is formed only along the at least one solar cell 1 adjacent to the left side and the right side between the two solar cells 1 arrange | positioned adjacent to the row direction. Therefore, as compared with FIG. 5, instead of the insulation portions 31a disposed on both sides of the solar cell rows, the insulation portions 31a are disposed on both sides of the solar cell 1.

In addition, the insulating portion 31b includes two solar cells vertically adjacent to each other among the solar cells 1 disposed in the first row and the last row, that is, the solar cells 1 disposed at the outermost part of the solar cell module 20. It is formed along (1).

For this reason, the position alignment of each insulation part 31a, 31b and the adjacent solar cell 1 is easy, and the defective rate resulting from misalignment reduces.

Unlike the embodiment with reference to FIGS. 5 and 6, in other alternative embodiments, the arrangement shape and the connection relationship of the first and second connecting portions 21 and 22 of the odd-numbered and even-numbered rows may be changed. Can be. Also in an alternative embodiment, the arrangement position of the third connecting portion 23a may be arranged adjacent to the solar cell 1 arranged in the last column of the first row and the last row. In this case, the solar cells 1 located in the last column of the first row are connected in series in a zigzag form from the solar cells 1 located in the last column of the last row.

5 and 6, the first current collector 161 and the second current collector 162 are alternately located from the upper side, but the second current collector 162 and the second current collector 162 are alternately located. The first current collector 161 may be alternately positioned, and the first current collector 161 and the second electrode current collector 162 may be formed in different forms.

The solar cell module 20 according to the embodiment of the present invention having the same structure is manufactured by various methods depending on the material of the first to fourth connectors 21-24.

First, referring to FIG. 7, a method of manufacturing the solar cell module 20 when all of the first to fourth connectors 21-24 are patterned using a conductive material will be described.

7 is a flow chart of an example of a method of manufacturing a solar cell module according to an embodiment of the present invention.

First, as shown in FIG. 7, when an operation for manufacturing the solar cell module 20 is started (S10), the plurality of solar cells 1 are arranged in a desired matrix structure, and then a plurality of insulation portions are disposed at predetermined positions. A 31 is formed to form a solar cell array in which the plurality of solar cells 1 are connected to the plurality of insulation units 31 (S110). In this case, the insulating part 31 may attach an insulating tape or the like overlapping with the adjacent solar cell 1, or may form the insulating part 31 at a desired position by using an indirect printing method or a direct printing method.

Then, the conductive material is printed in a predetermined pattern at the corresponding positions of the solar cell 1 and the insulator 31, so that the first to fourth connectors 21-24 are placed on the solar cell 1 and the insulator 31. To form (S120).

In this case, the first to fourth connection parts 21 to 24 may be formed using ink mask printing, EHD jet printing, and offset printing, as well as indirect printing using a mask, such as screen printing. It is formed using a direct printing method without a mask, such as offset printing, gravure printing, flexo printing, or aerosol jet printing. In this case, the number of times of printing may be performed a plurality of times until the first to fourth connecting portions 21 to 24 having a desired thickness are obtained. As the thickness of the first to fourth connectors 21-24 increases, the wiring resistance decreases, thereby improving transmission efficiency of the first to fourth connectors 21-24.

Next, on the rear sheet 210, the lower filler 220, the solar cell array having the first to fourth connectors 21-24 formed on the lower filler 220, the upper filler 230 on the solar cell array, and the upper portion. After the transparent member 240 is sequentially positioned on the filler 230, a laminating process of applying predetermined heat and pressure is performed (S130) to form the solar cell module 20.

Next, by installing a frame on the edge of the solar cell module 20 (S140), the solar cell module 20 is completed.

As such, since all of the first to fourth connectors 21-24 are formed on the solar cell array, there is no separate film for forming the first to fourth connectors 21-24. The manufacturing cost of 20 is reduced and the process is simplified.

In addition, since the alignment operation between the solar cell 1 and the first to fourth connectors 21-24 is not required, the manufacturing time and the defective rate of the solar cell module 20 are reduced.

Furthermore, since all of the first to fourth connecting portions 21 to 24 are formed at the same time by patterning the conductive material, there is no need to use a conductive tape such as a ribbon. This eliminates the need for a tabbing process for attaching the ribbon to that location. Therefore, the material and equipment for the tap process are saved, and since the first to fourth connectors 21-24 form one process, the manufacturing process is reduced and the manufacturing efficiency of the solar cell module 20 is improved.

Next, referring to FIG. 8, the first and second connectors 21 and 22 are formed of a conductive tape such as a ribbon, and the third and fourth connectors 23, 23a and 24 are patterned using a conductive material. If it does, the manufacturing method of the solar cell module 20 is demonstrated.

First, as in the solar cell array forming step S11 shown in FIG. 7, the plurality of solar cells 1 are arranged in a desired matrix structure, and then a plurality of insulating portions 31 are formed at predetermined positions, To form a battery array (S210).

Next, a conductive tape such as a ribbon containing a conductive material is attached to a corresponding position of the solar cell 1 to form the first connection portion 21 and the second connection portion 22 (S220).

Next, the conductive material is printed in a predetermined pattern at the corresponding positions of the plurality of insulating portions 31 to form third and fourth connecting portions 23, 23a, and 24 on the insulating portion 31 (S230). As described above with reference to FIG. 7, the third and fourth connection parts 23, 23a, 24 are formed by an indirect printing method, a direct printing method, or the like.

In this case, after the first and second connecting portions 21 and 22 are formed and before the third and fourth connecting portions 23, 23a and 24 are formed, the first and second connecting portions 21 and 22 and the third and An adhesive member may be applied to a portion where the fourth connecting portions 23, 23a, and 24 overlap with each other.

Then, on the rear sheet 210, the lower filler 220, the solar cell array having the first to fourth connectors 21-24 formed on the lower filler 220, the upper filler 230 on the solar cell array, and After the transparent member 240 is sequentially positioned on the upper filler 230, a laminating process of applying predetermined heat and pressure is performed (S240) to form the solar cell module 20.

Next, by installing a frame on the edge of the solar cell module 20 (S250), the solar cell module 20 is completed.

In FIG. 8, the order of forming the first and second connection portions S220 and the third and fourth forming steps S230 may be changed.

Therefore, since there is no separate film for forming the first to fourth connectors 21-24, the manufacturing cost of the solar cell module 20 is reduced, the process is simplified, and the solar cell 1 and the first to the fourth to fourth connectors 21-24 are reduced. Since the alignment operation with the fourth connectors 21-24 is unnecessary, the manufacturing time and the defective rate of the solar cell module 20 are reduced.

Next, referring to FIG. 9, in contrast to FIG. 8, the first and second connectors 21 and 22 are patterned using a conductive material, and the third and fourth connectors 23, 23a and 24 are ribbons. When formed with a conductive tape as described above, a manufacturing method of the solar cell module 20 will be described.

First, similarly to the solar cell array forming step S110 shown in FIG. 7, the plurality of solar cells 1 are arranged in a desired matrix structure, and then the plurality of insulating portions 31 are formed at predetermined positions. To form a battery array (S210). In this case, when the insulating part 31 is formed using the insulating tape, the insulating part 31 may have an adhesive force on the opposite surface as well as the surface attached to the solar cell 1.

Next, the conductive material is printed in a predetermined pattern at the corresponding position of the solar cell 1 to form first and second connection portions 21 and 22 on the solar cell 1 (S320). As described above with reference to FIG. 7, the first and second connecting portions 21 and 22 are formed by an indirect printing method or a direct printing method.

Next, a conductive tape such as a ribbon containing a conductive material is attached to a corresponding position of the insulating portion 31 to form third and fourth connection portions 23, 23a, and 24 (S330). At this time, when the insulating portion 31 has adhesive strength on both sides, the insulating portion 31 and the third and fourth connecting portions 23, 23a, 24 and the adhesive force are further improved.

In this case, as described with reference to FIG. 8, after the first and second connection parts 21 and 22 are formed, before the third and fourth connection parts 23, 23a and 24 are formed, the first and second parts are formed. An adhesive member may be applied to a portion where the connecting portions 21 and 22 and the third and fourth connecting portions 23, 23a and 24 overlap.

Then, on the rear sheet 210, the lower filler 220, the solar cell array having the first to fourth connectors 21-24 formed on the lower filler 220, the upper filler 230 on the solar cell array, and After the transparent member 240 is sequentially positioned on the upper filler 230, a laminating process of applying predetermined heat and pressure is performed (S340) to form the solar cell module 20.

Next, a frame is installed at the edge of the solar cell module 20 (S350) to complete the solar cell module 20.

As shown in FIG. 8, the order of forming the first and second connectors S220 and the forming the third and fourth S230 may be changed.

Therefore, since there is no separate film for forming the first to fourth connectors 21-24, the manufacturing cost of the solar cell module 20 is reduced, the process is simplified, and the solar cell 1 and the first to fourth connectors are formed. Since the alignment operation with (21-24) is not necessary, the manufacturing time and the defective rate of the solar cell module 20 are reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

1 is a partial perspective view of a solar cell according to an embodiment of the present invention.

FIG. 2 is a rear view of the solar cell shown in FIG. 1.

3 is a cross-sectional view of the solar cell shown in FIG. 1 taken along the line II-II.

  4 is a schematic perspective view of a solar cell module according to an embodiment of the present invention.

  FIG. 5 is a diagram illustrating an example of a connection state of the solar cell illustrated in FIG. 4.

  FIG. 6 is a diagram illustrating another example of a connection state of the solar cell illustrated in FIG. 4.

  7 is a flowchart illustrating a method of manufacturing a solar cell module according to an embodiment of the present invention.

  8 is a schematic perspective view of a solar cell module according to another embodiment of the present invention.

  9 is a flowchart illustrating a method of manufacturing a solar cell module according to another embodiment of the present invention.

Brief description of the main parts of the drawing

1: solar cell 20, 20a: solar module

21: first connecting portion 22: second connecting portion

23, 23a: third connecting portion 24: fourth connecting portion

100: substrate 120 emitter part

130: antireflection film 140: front electrode

150: rear electrode 161: first collector

162: second collector 170: rear electric field

210: rear sheet 220, 230: filler

240: transparent member 250: frame

Claims (19)

A first electrode connected to a substrate of a first conductivity type, a second electrode connected to an emitter part of a second conductivity type opposite to the first conductivity type, a first current collector connected to the first electrode, and the second electrode A plurality of solar cells having a second current collector connected to the first current collector, a first connection part connected to the first current collector, and a second connection part connected to the second current collector, and arranged in a plurality of rows and columns; And At least one insulating portion extending in a column direction and positioned in a space between two solar cells disposed adjacent to each other in a row direction and overlapping a portion of the two solar cells; and At least one of the two solar cells disposed on the insulation and extending in a column direction and connecting adjacently in one row to a first connection of one of the two solar cells and a second connection of the other solar cell; Including a third connection, A solar cell module comprising at least one fourth connection connecting a first connection of one of the two solar cells and a second connection of the other solar cell arranged adjacent to different rows in one column. delete In claim 1, The fourth connection portion is a solar cell module located on the insulating portion disposed on the outermost portion of the solar cell module. In claim 1, The first to fourth connection portions are a solar cell module formed of a conductive tape or a pattern printed using a conductive material. 5. The method of claim 4, When the third and fourth connection portion is formed of a conductive tape, the conductive tape has a concave-convex surface. The method of claim 5, The uneven surface of the solar cell module is formed in the direction in which light is incident. In claim 1, Further comprising a back sheet and a filler positioned on the back sheet, The solar cell and the insulating portion is a solar cell module located on the filler. In claim 1, And the first connector extends beyond the first end of the solar cell, wherein a portion of the first connector is positioned over the insulation. 9. The method of claim 8, And the second connector extends beyond a second end opposite the first end such that a portion of the second connection is positioned over the insulation. The method of claim 9, And a width of the third and fourth connectors is greater than or equal to a gap between a portion of the first connector and a portion of the second connector. In claim 1, And the first collector and the second collector are positioned on a surface of the substrate facing the light receiving surface. In claim 1, The solar cell module of claim 1, wherein the arrangement of the first connection portion and the second connection portion respectively disposed in the plurality of solar cells arranged in different columns in one row is the same. In claim 1, The arrangement of the first connection portion and the second connection portion located in the solar cells disposed adjacent to each other in one column is 180 ° rotationally symmetrical solar module. In the method of manufacturing a solar cell module comprising a plurality of solar cells each having a first current collector to transfer the first charge transferred from the substrate and a second current collector to transfer the second charge transferred from the emitter portion, Arranging the plurality of solar cells in a plurality of rows and a plurality of columns, respectively, and forming an insulating part overlapping a portion of the solar cells in a space between adjacent solar cells in a row direction to form a solar cell array; A conductive material is printed on the solar cell and the insulator to form a first connection portion positioned on the first current collector portion, a second connection portion positioned on the second current collector portion, and two aspects disposed adjacent to each other in a row. A third connection connecting a first connection of one of the solar cells to a second connection of the other solar cell, and a first connection of any one of the two solar cells arranged adjacently in one row. Forming a fourth connector connecting the second connector of the solar cell, Disposing the solar cell array on a back sheet, disposing a filler on the solar cell array, and disposing a transparent member on the filler; and A solar cell module manufacturing method comprising the step of performing a laminating process by applying heat and pressure. In the method of manufacturing a solar cell module comprising a plurality of solar cells each having a first current collector to transfer the first charge transferred from the substrate and a second current collector to transfer the second charge transferred from the emitter portion, Arranging the plurality of solar cells in a plurality of rows and a plurality of columns, respectively, and forming a plurality of insulating parts to overlap a portion of the solar cells in a space between adjacent solar cells in a row direction to form a solar cell array; Attaching a conductive tape over each solar cell to form a first connection portion located on the first current collecting portion of each solar cell, a second connection portion located on the second current collecting portion, A third connection portion which prints a conductive material over the plurality of insulation portions to connect the first connection portion of one of the two solar cells and the second connection portion of the other solar cell arranged adjacently in one row, and Forming a fourth connection portion connecting the first connection portion of one of the two solar cells arranged adjacently in one row with the second connection portion of the other solar cell, Disposing the solar cell array on a back sheet, disposing a filler on the solar cell array, and disposing a transparent member on the filler; and A solar cell module manufacturing method comprising the step of performing a laminating process by applying heat and pressure. In the method of manufacturing a solar cell module comprising a plurality of solar cells each having a first current collector to transfer the first charge transferred from the substrate and a second current collector to transfer the second charge transferred from the emitter portion, Arranging the plurality of solar cells in a plurality of rows and a plurality of columns, respectively, and forming a plurality of insulating portions overlapping a portion of the solar cells in a space between adjacent solar cells in a row direction to form a solar cell array; Printing a conductive material over each solar cell to form a first connection portion located on the first current collecting portion of each solar cell and a second connection portion located on the second current collecting portion, A third connection portion attaching a conductive tape over the plurality of insulation portions to connect the first connection portion of one of the two solar cells and the second connection portion of the other solar cell arranged adjacently in one row; and Forming a fourth connection portion connecting the first connection portion of one of the two solar cells arranged adjacently in one row with the second connection portion of the other solar cell, Disposing the solar cell array on a back sheet, disposing a filler on the solar cell array, and disposing a transparent member on the filler; and A solar cell module manufacturing method comprising the step of performing a laminating process by applying heat and pressure. The method of claim 14, 15, or 16, The conductive material is a solar cell module manufacturing method which is printed by direct printing or indirect printing. delete delete

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