JP2002141535A - Method of taking out power leads of solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of taking out power leads of a solar cell module, which is simple and has a high insulation reliability and does not damage the appearance. SOLUTION: Power leads using a flexible laminate lead wire having a metal foil 42 on one side of a resin film 44 and an adhesive layer 43 on the other side are adhered tightly at specified positions in a solar cell 1 through the adhesive layer 43, the resin film and the adhesive layer on one end of each power lead are previously removed to form a conductor-exposed part 45 of the metal foil, the exposed part 45 is electrically connected to a specified electrode 31 of the solar cell, and the other end of the lead wire is electrically connected to an outer power lead terminal and sealed with an adhesive resin seal laminated between a surface protective member of the cell and a backside protective member, thereby manufacturing a solar cell module.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a solar cell comprising a plurality of solar cell elements connected in series between a front surface protection member and a back surface protection member, which are sealed with an adhesive resin sealing material. The positive and negative power leads of the solar cell
The present invention relates to a method for drawing out power leads of a solar cell module electrically connected to an external power drawing terminal.

[0002]

2. Description of the Related Art At present, research and development of clean energy are being promoted from the standpoint of environmental protection. Above all, solar cells are attracting attention because of their infinite resources (solar rays) and no pollution. A typical example of a solar cell (photoelectric conversion device) in which a plurality of solar cell elements formed on the same substrate are connected in series is a thin-film solar cell.

Thin-film solar cells are considered to be the mainstream of solar cells in the future because of their thinness, light weight, low production cost, and easy area enlargement. Demand is expanding for business use and general residential use, which are used for such purposes.

[0004] Conventional thin-film solar cells use a glass substrate, but research and development of a flexible solar cell using a plastic film has been promoted in terms of weight reduction, workability, and mass productivity. Taking advantage of this flexibility, mass production became possible by a roll-to-roll manufacturing method.

[0005] An example of the structure and manufacturing method of the above-mentioned thin film solar cell is described in, for example, Japanese Patent Application Laid-Open No. Hei 10-233517 and Japanese Patent Application No. Hei 11-19306.

[0006] FIG. 11 is a diagram showing the structure of the semiconductor device.
FIG. 2 is a simplified perspective view of the configuration of the thin-film solar cell. In FIG. 11, the unit photoelectric conversion element 62 formed on the front surface of the substrate 61 and the connection electrode layer 63 formed on the back surface of the substrate 61 are completely separated into a plurality of unit units, respectively, and are formed with their separation positions shifted. ing. Therefore, the current generated in the photoelectric conversion layer 65, which is the amorphous semiconductor portion of the element 62,
6 and then through the current collecting holes 67 formed in the transparent electrode layer region to the connection electrode layer 63 on the back surface, and further formed outside the transparent electrode layer region of the device in the connection electrode layer region. The lower electrode layer 6 extending outside the transparent electrode layer region of the element adjacent to the element via the connection hole 68 for series connection
4, and the two elements are connected in series.

[0007] A plurality of the thin-film solar cells are combined and covered with an electrical insulating protective material to constitute a thin-film solar cell module. As the thin-film solar cell module, the solar cell formed on the electrically insulating film substrate, together with the internal power lead wires, is sealed with an electrically insulating protective material, and the light receiving surface side of the solar cell and It is known that a front surface protection member and a back surface protection member are provided on both sides of the non-light receiving surface.

FIG. 6 shows an example of the solar cell module disclosed in Japanese Patent Application No. 11-160782 by the same applicant as the present application, wherein (a) is a perspective plan view and (b) is a perspective view.
FIG. 3 is a sectional view taken along line XX in FIG. In the solar cell module shown in FIG. 6, solar cell units 1 u arranged at a predetermined interval (an EV
A (temporarily laminated adhesive 23 made of A (ethylene vinyl acetate) and cut to a predetermined size) is disposed on both outer sides, and is an internal wiring 22 made of, for example, a Sn / Cu / Sn material, which is a metal foil. And an auxiliary wiring 25 which is an Al foil / PET (polyethylene terephthalate) with a conductive adhesive connected to the back electrode of the solar cell unit 1u, and a mesh-like plastic fiber 26 and a weather resistance through an adhesive (EVA) 23. High fluorine film such as E
Laminated with a moisture-proof film 24 made of TFE (ethylene / tetrafluoroethylene copolymer), the ETFE film 24 is laminated and sealed on the side opposite to the light-receiving side (non-light-receiving side) via EVA3.

[0009] The laminated one as described above
Vacuum heat treatment at 50 ° C., cross-linking and curing of EVA,
TFE is adhered and the whole is resin-sealed with EVA. Thereby, safety of the electrical connection between the solar cell unit 1u, the auxiliary wiring 25, and the internal wiring 22 is also ensured. The long laminated film is cut at the CC section in FIG. 6 to obtain a solar cell module M including a predetermined number of solar cell units 1u.

In the solar cell module, the materials of the front surface protection member and the back surface protection member and the configuration of the protective layer have various modifications depending on the purpose. As described above, a glass plate may be used for the surface protection member.

There are various methods for extracting the power leads of the solar cell module to the outside. For example, FIGS. 7 to 10 show an example of the solar cell module described in Japanese Patent Application No. 2000-82269 by the same applicant as the present application, FIG. 7 is a plan view of the solar cell module, and FIG. A cross-sectional view, FIG. 9 is a perspective view of a state in which the leading end of the power lead lead-out portion is raised in the cutout portion, and FIG. 10 is an external lead wire connecting member attached to the rod-shaped terminal connected to the cable. FIG.

In the solar cell module shown in FIGS. 7 and 8, E
An adhesive layer 2 using VA or the like, a moisture-proof layer 3 using ETFE or the like, a reinforced layer 4 in which EVA is filled with glass fiber to increase the mechanical strength, and an ETFE or the like is used to prevent adhesion of contaminants. A light-receiving surface-side protective layer 6 as a weather-resistant protective layer composed of a surface protective layer 5 is laminated to protect the solar cell 1.

On the non-light-receiving side opposite to the sunlight incident side, the adhesive layer 7, the insulating layer 8 using ETFE or polyimide, which has both waterproof and electrical insulation, and the reinforcing layer 11 are joined. An adhesive layer 9 made of EVA or the like is laminated to form a non-light receiving surface side protective layer 10, and a reinforcing layer 11 made of a metal plate or the like laminated thereon is adhered,
Each of the above-mentioned layers is integrated by a pressure heat sealing laminate.

Further, the light-receiving-side protective layer 6, the non-light-receiving-side protective layer 10, and the reinforcing layer 11 extend to the non-power-generating region beside the solar cell 1, and the substantially square-shaped solar cell 1
A power lead wire (the above-described internal wiring) 12 of a flat foil copper wire is disposed in parallel along both sides of the wire, and a crossover (the above-described auxiliary wiring) 1 of a conductive adhesive tape or soldered flat foil copper wire.
3 is connected to a positive pole or a negative pole (not shown) of the solar cell 1, respectively.

Further, near the end of the power lead wire 12,
Power terminal box 14 that relays the generated power to the outside
Are fixed to the reinforcing layer 11 by bonding or screwing, and the power lead wire 12 and the cable 15 are electrically connected by the connection wire 16 to form a square and flat solar cell module 50 as a whole. .

FIGS. 9 and 10 show an improvement of the method of drawing out the power leads of the solar cell module of FIGS. 7 and 8,
The present invention relates to a method for drawing out power leads of a solar cell module in which the joining operation between a power lead wire for drawing power to the outside and an external cable is simple and the insulation reliability is high (for details, refer to Japanese Patent Application No. 2000-82269).

The external lead wire connecting member 51 and the peeling member 90 as power leads in FIG. 9 are buried in the protective layer 70. When the power lead is drawn out, it is dedicated to the protective layer 70. A notch is formed in a U-shape using a cutter, and the external lead wire connecting member 51 at that portion is lifted up together with the protective layer 70, and then the peeling member 90 on the external lead wire connecting member 51 is removed. Is exposed, and soldering is performed on the rod-shaped terminal 209 of the cable 210 shown in FIG. In the perspective view of FIG.
Reference numeral 13 denotes a cut portion, and reference numeral 103 denotes a reinforcing layer. In the perspective view of FIG. 10, reference numeral 201 denotes a power terminal box.

By the way, in the above-described method for drawing out power leads of a solar cell module, the power lead wires (or internal wiring) are disposed outside the effective light receiving surface of the solar cell, but the area of the effective light receiving surface is increased. To this end, a method has been adopted in which a power lead wire is disposed inside the effective light receiving surface of the solar cell, and is disposed between the solar cell and the adhesive protective layer via an electrical insulating layer.

FIG. 5 shows a schematic configuration of a solar cell module relating to the above-described power lead drawing method.
FIG. 5B is a plan view, and FIG. 5A is a cross-sectional view taken along the line AA in FIG.

As shown in FIG. 5 (a), a surface protection member 38 made of a glass plate is used on the sunlight incident side of the solar cell 1, and fluorine containing A1 foil is used as a back surface protection member 36 on the opposite side. EVA is used as the adhesive layer 37 using a resin film.
And a solar cell module 30 is formed by pressing and heat-sealing laminate.

A lead portion 48 for the power lead wire 40 is provided substantially at the center of the solar cell module 30 and pulled out to the power terminal box 20 to be electrically connected to an external terminal (not shown). The power terminal box 20 is provided on the film back surface protection member 36 by adhesive bonding. Positive electrode and negative electrode 2
The power lead wire 40 is disposed from the lead portion 48 of the power lead wire to a peripheral portion of the solar cell module along a separation line (not shown) for patterning the solar cell, and the other end of the power lead wire 40 is provided. Is connected to the electrode part of the solar cell.

Further, as the electric lead wire 40, usually, a solder-coated copper foil, a tin-coated copper foil, or the like is used.
Since the electric lead wire 40 passes over the back surface connection electrode layer of the solar cell 1, an EVA spacer 71 having a relatively small width dimension is provided between the solar cell 1 and the electric power lead line 40 along the electric power lead line 40. To ensure insulation between them.

[0023]

By the way, the conventional method for extracting power leads of a solar cell module shown in FIG. 5 has the following problems.

As described above, the EVA spacer is inserted between the back surface connection electrode layer of the solar cell and the power lead wire to perform insulation treatment. Irregularities and steps occur in the solar cell, and there is a problem that is not preferable in appearance.

Despite the use of a relatively thick EVA spacer, the EVA spacer 71 having a relatively small width is melted by heating at the time of modularization, and the EVA spacer 71 is melted.
There is a problem that a portion where the insulating layer is missing occurs, and the electric lead wire and the back surface connection electrode layer come into contact with each other, resulting in poor insulation.

The electric lead wire is placed on the back surface connection electrode layer, and then, when assembling other materials, the electric lead wire and E
There was a problem that the VA spacer was moved, it took time to install, and the working efficiency was poor.

As described above, the solar cell is formed with a current collecting hole and a connection hole for series connection. As described above, when the electric lead wire is arranged along the patterning separation line of the solar cell from the central drawer toward the solar cell module peripheral portion, the electric lead wire passes over the connection hole. Will pass. When the electric lead wire is viewed from the light receiving surface side of the solar cell module, the portion of the connection hole looks white, and there is a problem in appearance.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to make it easy to draw a power lead wire inside a solar cell to the outside, and to make the insulation reliable. It is an object of the present invention to provide a method for leading out a power lead of a solar cell module which has high performance and does not cause a problem in appearance.

[0029]

According to the present invention, a plurality of solar cell elements are connected in series and / or in parallel between a front surface protection member and a back surface protection member. A method for extracting power leads of a solar cell module, comprising sealing a solar cell with an adhesive resin sealing material and electrically connecting positive and negative power lead wires of the solar cell to an external power extraction terminal At
After laminating the surface protective member and an adhesive layer as a resin sealing material, disposing the solar cell at a predetermined position on the adhesive layer, a predetermined series between solar cells and / or
Alternatively, a parallel connection is performed, and a flexible laminated lead having a metal foil on one side of a resin film and an adhesive layer on the other side is used as the power lead, and the power lead is connected to a predetermined portion of the solar cell. At the position shown in FIG. 1, the conductor exposed portion of the metal foil provided in advance by removing the resin film and the adhesive layer at one end of the power lead wire by attaching and fixing the adhesive layer via the adhesive layer. After electrically connecting to the predetermined electrode portion and electrically connecting the other end of the power lead wire to the external power lead terminal, an adhesive layer as a resin sealing material and the back surface protection member Are laminated and sealed with the adhesive resin sealing material of the adhesive layer (the invention of claim 1).

As described above, a flexible power lead having a metal foil on one side of a resin film and an adhesive layer on the other side is bonded to a predetermined position of a solar cell, and then an electrical connection operation is performed. Is performed, connection work becomes easy. In addition, since the insulation between the solar cell and the power lead wire can be ensured by the relatively thin resin film, the reliability of the insulation is improved, and the aesthetic problem of unevenness and steps is eliminated.

As an embodiment of the first aspect of the present invention, the following second to sixth aspects of the present invention are preferable. That is, claim 1
In the method for leading out a power lead of a solar cell module according to the above, the power lead has a copper foil fixed on one side of a resin film by an adhesive, and a flexible laminated lead having a different adhesive layer on the other side. The width of the copper foil is smaller than the width of the resin film (the invention of claim 2).

According to the above method, since the width of the copper foil is smaller than the width of the resin film, the reliability of insulation between the solar cell and the power lead wire is further improved.

[0033] In the method of drawing out a power lead of a solar cell module according to claim 1 or 2, electrical connection between a conductor exposed portion of a metal foil in the power lead wire and predetermined positive and negative electrode portions of the solar cell is established. , Soldering or connection using a conductive adhesive (claim 3
Invention). Thereby, the workability of the electrical connection is improved. Soldering is performed by using a pulse heating method, and by connecting with a conductive adhesive, insulation damage due to heat can be prevented.

Further, in the method of drawing out the power lead of the solar cell module according to any one of claims 1 to 3, the color of the metal foil of the resin film of the power lead can be seen through to the surface protection member side. In order to prevent this, a colored resin film is used (the invention of claim 4). Thereby, the poor appearance in which the connection hole portion of the solar cell looks white can be eliminated.

According to a fifth aspect of the present invention, a power lead lead-out portion is provided substantially at the center of the solar cell module, and the two power lead wires of the positive electrode and the negative electrode are connected to the solar cell module from the lead-out portion. By disposing the solar cell module along the separation line for patterning toward the periphery of the solar cell module, the effective light receiving area of the solar cell module can be increased.

Further, as in the invention of claim 6, a peeling member of a predetermined length is provided at a tip of the exposed portion of the metal foil conductor in the power lead wire, and the adhesive resin seal of the solar cell module is provided. After sealing with a stopper, a substantially U-shaped cut is made through the resin sealing material including the tip portion, leaving one side of a square, and then the resin sealing material of the cut portion and the power lead Causing the end of the wire and
The exfoliation member is exfoliated to form the end portion of the power lead wire as an exposed portion, and the extremity portion is electrically connected to the external power lead-out terminal. The power lead-out method similar to that described above can be adopted, so that there is no need to manually cut or remove the sealing protection member on the power lead wire by heat, thereby improving the workability and the insulation reliability.

If the connection portion needs to be insulated, the insulation reliability is further improved by applying a resin sealing material or the like in advance and performing the insulation process.

[0038]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 to 3 show an embodiment of the present invention. FIG. 1 is a view corresponding to the conventional solar cell module of FIG. 5, and FIG. FIG. 1B is a schematic plan view of the solar cell module viewed from the back side.
1 shows a sectional view taken along the line AA in FIG. FIG.
FIG. 1A is a diagram illustrating the connection state of a solar cell element and the flow of current after slightly increasing the schematic plan view of FIG. 1A. FIG. 3 shows the structure of a power lead and its connection state to a solar cell. FIG. 3A is a cross-sectional view of a laminated structure of an electric lead wire, and FIG. 3B is a diagram in which an end portion of a solar cell back surface connection electrode layer and an exposed portion of the electric lead wire conductor are bent. FIG. 1 shows a cross-sectional view of a soldered structure.

First, as shown in FIG. 1, an adhesive layer 37 (EVA) on the solar cell module light receiving surface side is provided on a glass plate 38 as a surface protection member, and two solar cells 1 are placed at predetermined positions on this. After setting, auxiliary wiring 3 made of conductive adhesive
5 connects the solar cells 1 in series.

In this case, the solar cell has, for example, an electrical connection configuration as shown in FIG. The two left and right solar cells are each divided into four, and each of the four divided solar cells has a plurality of unit cells (solar cell elements) connected in series.

The four divided solar cells are electrically parallel to each other, and an auxiliary wiring 3 is provided between the left and right solar cells.
5 are connected in series. Left and right + side and-
The common conductor 49 on the side is connected to one end of the power lead 40, respectively. The power lead 40 is disposed on a separation line at the center of the solar cell divided into four parts. One end of the power lead 40 is located at the shared conductor part, and the other end is located at the power lead lead-out part at the center of the solar cell module. It is connected to an external terminal (not shown) of the box 20. The current flow is indicated by arrows in the figure.

Next, as the power lead wire 40, FIG.
As shown in (a), adhesive 43 / resin film 44 /
A flexible laminated product of the adhesive 43 and the copper foil 42 was formed, and a conductor exposed portion 45 was formed in advance at one end 10 mm on one side.
As shown in (b), the conductor exposed portion 45 is bent and soldered to the electrode portion 31 on the back surface of the solar cell 1 by a pulse heating type soldering device. Except for the conductor exposed portion 45, the adhesive 43 laminated on the flexible electric lead wire 40
To fix to the back surface connection electrode layer of the solar cell 1 by adhesion.

The part of the terminal box 20 connected to the external terminals is
As shown in FIG. 1 (b), the adhesive layer 37 (EVA) is bent at 90 ° and a hole is formed in advance.
The lead wire 40 is drawn out from the hole of No. 6 and bent, and a fluorine-based adhesive tape (not shown) as a peeling member 90 is previously attached and fixed to the conductor exposed portion 45 of the lead wire 40 in the same manner as in FIG. At the time of soldering, after the peeling member was removed, preparation was made so that connection work could be performed. After fixing of each material, the solar cell module was manufactured by laminating (modifying) under a predetermined condition using a laminating apparatus.

As the copper foil of the electric lead wire 40, a thermoelectrolytic copper foil or a rolled copper foil is used. Its thickness is 25-100
A range of μm is suitable. If it is less than 25 μm, it will be disconnected at the time of connection and will not satisfy the requirements. These copper foils may be used as they are or after solder plating and tin plating.

The adhesive 43 is made of acrylic, epoxy, polyester or the like.
A range of 5 to 50 μm is preferred. If the film thickness is more than this, a positional shift or the like is caused by pressurization and heating, resulting in a loss of dimensions and one of the causes of a step.

The main purpose of the resin film 44 is insulation, and a polyimide film, a polyester film, or an aramid film is used.
The film thickness is in the range of 25 to 75 μm, and is colored, for example, black. Thereby, when viewed from the light incident side, the problem that the copper foil and the solder / tin plating of the power lead wire 40 appear brown or white, are caught as foreign matter, and finally have a poor appearance is solved. it can.

After the solar cell module is manufactured, the electric lead wire 40 is provided together with the fluorine-based adhesive tape as the peeling member.
Then, the solder connection portion is exposed by removing the fluorine-based adhesive tape in the manner shown in FIG. 9, and after connecting with the external terminal, the power terminal box main body 20 contains, for example, a silicon resin material. Was injected and cured to perform an insulation treatment also to prevent moisture intrusion, and a lid of the terminal box 20 was attached.

According to the above method, the problem of the prior art can be solved, a highly reliable electrical and mechanical lead-out structure can be obtained, and workability can be greatly improved.

(Embodiment 2) FIG. 3 schematically shows a different method of connecting a power lead to a solar cell according to the present invention. In this embodiment, the electrical connection between the conductor exposed portion 45 of the metal foil in the power lead wire and the predetermined electrode portion 31 of the solar cell is connected by a conductive adhesive 55, and otherwise,
It was the same as in the first embodiment. According to the second embodiment, the reliability of insulation can be improved and the workability can be improved because the semiconductor device is less susceptible to thermal damage in the electrical connection work than soldering.

(Comparative Example) A solder plating copper foil having a thickness of 100 μm was used as the copper foil 42 of the electric lead wire 40, and EVA as an insulating material was formed on the back surface connection electrode layer of the solar cell 1 as shown in FIG. The spacer 71 was cut and inserted into a predetermined size, and soldered to the back electrode portion of the solar cell 1 with a soldering iron to produce a solar cell module. The appearance was such that the unevenness of the wiring portion into which the EVA spacer 71 was inserted was clearly visible.

The solar cell modules manufactured by the methods of Examples 1 and 2 and Comparative Example were subjected to a high-temperature and high-humidity (85 ° C., 95% RH) test for 500 hours. As a result, in Examples 1 and 2, there was no change in appearance, and no occurrence of electrical failure (insulation failure) or the like was observed. On the other hand, no electrical failure or the like occurred in the comparative example, but the unevenness became larger in appearance.

[0053]

According to the present invention, as described above, a solar cell in which a plurality of solar cell elements are connected in series and / or in parallel between a front surface protection member and a back surface protection member is sealed with an adhesive resin. In a method for extracting power leads of a solar cell module, wherein the power leads of a positive electrode and a negative electrode of the solar cell are electrically connected to an external power extraction terminal, the surface protection member and the resin After laminating an adhesive layer as a sealing material and arranging the solar cell at a predetermined position on the adhesive layer, a predetermined series and / or parallel connection between the solar cells is performed by auxiliary wiring, As a power lead, a flexible laminated lead having a metal foil on one side of a resin film and an adhesive layer on the other side is used, and the power lead is placed at a predetermined position of the solar cell, and the adhesive is The conductor exposed portion of the metal foil provided in advance by removing the resin film and the adhesive layer at one end of the power lead wire is electrically connected to a predetermined electrode portion of the solar cell. And the other end of the power lead wire is electrically connected to the external power lead-out terminal. Then, an adhesive layer as a resin sealing material and the back surface protection member are laminated, and the adhesive layer is bonded. The solar cell module is sealed with a conductive resin encapsulant, making it easy to draw out the power leads inside the solar cell to the outside, has high insulation reliability, and has no appearance problems. A power lead extraction method can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a solar cell module according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a connection state of a solar cell element and a current flow in the solar cell module of FIG.

FIG. 3 is a diagram illustrating a structure of a power lead according to the present invention and a connection state of the power lead to a solar cell.

FIG. 4 is a diagram illustrating an example of connection to a solar cell different from FIG.

FIG. 5 is a schematic configuration diagram of a solar cell module related to a conventional power lead drawing method.

FIG. 6 is a diagram showing an example of a configuration of a conventional solar cell module.

FIG. 7 is a plan view showing an example of a configuration of a conventional solar cell module different from FIG.

8 is a cross-sectional view of the solar cell module of FIG.

FIG. 9 is a perspective view of a state in which the leading end of the power draw-out section is raised in the cutout section.

FIG. 10 is a perspective view showing a state where an external lead wire connecting member is attached to a rod-shaped terminal connected to a cable.

FIG. 11 is a perspective view showing a configuration of a conventional solar cell.

[Explanation of symbols]

1: solar cell, 20: terminal box, 30: solar cell module, 31: electrode part, 35: auxiliary wiring, 36: back surface protection member, 37: adhesive layer, 38: surface protection member, 40: power lead wire, 42 : Copper foil, 43: Adhesive layer, 44: Resin film, 45: Conductor exposed part, 48: Leader, 49: Shared conductor, 51: External lead wire connecting member, 52: Internal lead wire, 53: Folded part, 55: conductive adhesive, 70:
Protective layer, 90: peeling member, 113: cut, 20
9: rod-shaped terminal, 210: cable.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiro Osawa 1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture F-term within Fuji Electric Co., Ltd. 5F051 BA18 EA02 EA17 EA18 EA20 GA03 JA04 JA05

Claims (6)

[Claims] 1. A method according to claim 1, further comprising the step of:
A solar cell in which a plurality of solar cell elements are connected in series and / or in parallel is sealed with an adhesive resin sealing material,
In the power lead-out method for a solar cell module, wherein the power lead wires of the positive electrode and the negative electrode of the solar cell are electrically connected to an external power lead-out terminal, the surface protective member and an adhesive layer serving as a resin sealing material. Are laminated, and the solar cells are arranged at predetermined positions on the adhesive layer.
Alternatively, a parallel connection is performed, and a flexible laminated lead having a metal foil on one side of a resin film and an adhesive layer on the other side is used as the power lead, and the power lead is connected to a predetermined portion of the solar cell. At the position shown in FIG. 2, the conductor exposed portion of the metal foil provided in advance by removing the resin film and the adhesive layer at one end of the power lead wire by bonding the adhesive layer through the adhesive layer, After electrically connecting to the predetermined electrode part, and electrically connecting the other end of the power lead wire to the external power lead-out terminal, an adhesive layer as a resin sealing material and the back surface protection member Are laminated and sealed with an adhesive resin sealing material for an adhesive layer. 2. The power lead wire is a flexible laminated lead wire having a copper foil fixed on one side of a resin film with an adhesive and a different adhesive layer on the other side, and a width dimension of the copper foil. 2. The method according to claim 1, wherein the width is smaller than the width of the resin film. 3. An electrical connection between a conductor exposed portion of a metal foil in the power lead wire and a predetermined positive / negative electrode portion of the solar cell is either by soldering or by a conductive adhesive. The method according to claim 1, wherein the power lead of the solar cell module is drawn. 4. The resin film of the power lead wire is a colored resin film in order to prevent a color of a metal foil from being seen through to the surface protection member side. 3. The method of drawing out a power lead of a solar cell module according to any one of 3. 5. A power supply lead-out portion is provided substantially at the center of the solar cell module. From the lead-out portion, two power lead wires of a positive electrode and a negative electrode are connected along a separation line for patterning the solar cell. The method according to any one of claims 1 to 4, wherein the power lead is arranged toward a peripheral portion of the module. 6. A peeling member having a predetermined length is provided at a distal end of the exposed portion of the metal foil conductor in the power lead wire, and after the solar cell module is sealed with the adhesive resin sealing material, the distal end is formed. After making a substantially U-shaped notch leaving one side of a square through the resin sealing material, the resin sealing material of the notch and the tip of the power lead wire are integrally caused. Wherein the exfoliation member is exfoliated to form a tip of the power lead wire so as to be exposed, and the tip is electrically connected to the external power lead-out terminal. 6. The method for drawing out a power lead of a solar cell module according to any one of 5.