JPH11340492A - Solar cell module and manufacture of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the occurrence of 'burrs' with the use of conventional EVA having good adhesiveness. SOLUTION: For the manufacturing of a solar cell module 1 comprising a translucent glass 2, a solar cell 5 sealed with a filler 3, and a backside film 6, the cut-size for longitudinal and lateral sizes, of the filler 3 prior to lamination is set smaller than that of the translucent glass 2. In addition, the cut-size, for longitudinal and lateral ones of the backside film 6 before lamination is set larger than that of the translucent glass.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In recent years, as the problem of global environment and energy depletion due to increased consumption of fossil fuels has become serious, sunlight has attracted attention as a clean energy source, and a device for directly converting this sunlight into electric power. That is, the development of solar cells is being actively pursued. One of the achievements is a solar cell module. This solar cell module is made of translucent glass,
The solar cell and the back film sealed with the filler are laminated in this order. EVA is usually used as the filler.

[0003] However, in this solar cell module, a film-like glass-side filler is placed on a translucent glass, and a plurality of solar cells connected by lead wires are arranged thereon, and a film-like filler is placed thereon. After placing the filler on the backside film side, placing the backside film on top of this, heating and pressurizing the whole, melting both fillers and manufacturing the whole as a unit, but heating and pressing Occasionally, EVA as a filler melts from the end of the translucent glass and protrudes to generate “burrs”. Therefore, it is necessary to provide a step of cutting off the “burrs” at the finishing stage. Therefore, it is difficult to increase the productivity, and there is a problem that the unit price of the originally expensive solar cell module cannot be reduced.

As a means for preventing the generation of this "burr", as described in JP-A-6-177412, there is known a method using an EVA having a melt flow rate of 14 g / 10 min or less, which is difficult to flow. In this publication,
It is also described that an organic peroxide or a coloring material is added to EVA to further lower the melt flow rate.

In addition, there is another problem that since the EVA protrudes, the melted EVA adheres to the inside of a fusion furnace and is difficult to manufacture. As a means for preventing the EVA from adhering to the inside of the fusing furnace, there is known a method of enlarging the back film as disclosed in JP-A-60-782.

[0006]

However, the melt flow rate used in the above conventional method is 14 g / 10 m.
When EVA is used, the flow of EVA at the time of heating is deteriorated, and "burr" from the translucent glass is not generated. However, the adhesion to the translucent glass and the back film is deteriorated, and the solar cell panel is deteriorated. During use, there is a problem that peeling occurs and air bubbles and rainwater enter into this portion.

Further, when the melt flow rate is reduced, the adhesiveness between the filler on the glass side and the filler on the back film side is deteriorated. The problem that it does not occur occurs. In particular, when an organic peroxide (crosslinking agent) or a coloring material is added to this EVA, the adhesiveness further decreases,
Many of the above problems occur. In addition, when the back film is enlarged, the melted EVA does not come out in the back direction and does not adhere to the fusion furnace, but the problem that "burrs" are generated around the translucent glass is not solved.

The present invention has been made in view of the above-mentioned circumstances, and provides a solar cell module which does not generate burrs even when a conventionally used EVA having good adhesiveness is used, and a method of manufacturing the same. It is intended to be.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 is to provide a front protective plate, a first and a second filler, and a back surface film having substantially the same shape as each other by using a front transparent protective plate. -1st filling material-solar cell-2nd filling material-
The present invention relates to a method for manufacturing a solar cell module, in which, after polymerization and lamination in the order of a back film, the whole is heated and pressurized to melt the first and second fillers and adhere the whole together.・ The area of the back film before pressing is S
1. Assuming that the area of the surface protection plate is S2 and the areas of the first and second fillers are S3, S1>S2> S3, or in any main direction of the back film before heating and pressing. The dimension is L1, the dimension in any main direction of the surface protection plate is L2,
The dimensions of the first and second fillers in any principal direction are L3
Then, the surface protection plate, the first and second fillers, and the back film satisfying the condition of L1>L2> L3 are replaced with the first film.
And the peripheral edge of the second filler is located inside the peripheral edge of the surface protection plate and the back film, and the peripheral edge of the surface protection plate is located inside the peripheral edge of the back film. These are characterized in that they are integrally adhered after being polymerized and laminated.

The invention according to claim 2 relates to a method for manufacturing a solar cell module according to claim 1, wherein
As the second filler, an ethylene-vinyl acetate copolymer is used, and the dimension L2 of the surface protective plate in any principal direction and the dimension L3 of the first and second fillers in any principal direction are determined. The difference ΔL23 (= L2−L3) is set to 4 to 8 mm.

According to a third aspect of the present invention, there is provided the method for manufacturing a solar cell module according to the first aspect, wherein a composite film of a vinyl fluoride resin or a polyethylene terephthalate resin and an aluminum foil is used as the back film. , The dimension of the back film in any main direction is L
The difference Δ between 1 and the dimension L2 in any main direction of the surface protection plate
L12 (= L1-L2) is set to 2 to 4 mm.

Further, according to a fourth aspect of the present invention, the surface protective plate, the first and second fillers, and the back surface film having substantially the same shape as each other include a front surface transparent protective plate, a first filler, a solar cell, and a 2 filler-back film laminated in the order of the film, and
Regarding the integrated solar cell module, the area of the back film alone before being integrally attached is S1, the area of the surface protection plate is S2, the area of the first and second filler alone is Is S3, S1>S2> S3, or
The dimension in the main direction of the back film before heating and pressing is L1 and the dimension in the main direction of the surface protection plate is L1.
2. The surface protection plate, the first and second fillers, and the back film satisfying the condition of L1>L2> L3, where L3 is the dimension of the first and second fillers in an arbitrary main direction. It is characterized by being manufactured using

[0013] The roof according to the fifth aspect of the present invention,
A solar cell module according to claim 4 is provided.

[0014]

According to the first aspect of the present invention, the area and dimensions of the filler before lamination are smaller than those of the surface protection plate such as translucent glass, and the area and dimensions of the back film before lamination. Since the dimensions are larger than those of the surface protection plate, at the time of manufacture, the filler is placed on the surface protection plate, the solar cell is placed on this filler, and the filler is further placed on the solar cell. However, even if the first and second fillers are melted when the back film is placed on the filler and heated and pressed, the filler is also removed from the surface protection plate side and from the back film side. It does not flow. Since the length of the filler flowing out varies depending on the type of the filler, it is preferable to know the distance of the filler flowing out in advance and to reduce the size of the filler by the distance flowing out.

As described above, since the filler does not flow out,
No burrs are generated, and no adhesion to the fusion furnace occurs. Therefore, labor and time for removing the burrs are eliminated, and productivity is improved. Further, since the filler does not flow out, EVA which has been conventionally used and has good adhesiveness can be used as it is without using special EVA having poor adhesiveness, and the occurrence of defective products is eliminated.

Further, in the structure of the present invention, an ethylene-vinyl acetate copolymer (EVA) is used as the first and second fillers, and the dimension L2 of the surface protective plate in an arbitrary main direction is determined. The difference ΔL23 (= L2−L3) from the dimension L3 of the filler (EVA) in any principal direction is 4 to 8 m.
m, for example, when a solar cell module is formed in a square shape, if the difference between the vertical and horizontal dimensions of the surface protection plate and the vertical and horizontal dimensions of the filler (EVA) is set to 4 to 8 mm, heating and heating are performed. The distance at which the filler (EVA) melted under pressure flows out by 2 to 4 mm on both sides in the vertical and horizontal directions (measured value)
Is approximately equal to Therefore, the end faces of the EVA and the surface protection plate become substantially uniform after heating and pressurization, and "burrs" are not generated, so that the time and labor for special finishing can be omitted, and the productivity is improved. If the difference ΔL23 is less than 4 mm, the molten EVA at the time of heating and pressurization may flow out from the peripheral edge of the surface protection plate to generate “burrs” or adhere to the fusion furnace. Therefore, it becomes a process such as "burr removal", and conversely,
If the difference ΔL23 exceeds 8 mm, the filler (EVA)
Is formed inside the peripheral edge of the surface protection plate to form a concave portion. Therefore, when the peripheral edge is sealed with a sealing material in a later step, there is a problem that the sealing becomes difficult.

According to a third aspect of the present invention, as the back film, a composite film of a vinyl fluoride resin or a polyethylene terephthalate resin (PET) and an aluminum foil is used, and the size of the back film in any main direction is set to L1. The difference ΔL12 (= L1−L2) from the dimension L2 of the surface protection plate in an arbitrary main direction was set to 2 to 4 mm. This 2
The distance of about 4 mm is substantially equal to the distance at which the linear distance becomes shorter due to the bending of the peripheral portion of the flexible back film in the direction of the surface protection plate during heating and pressing. For this reason,
Since the end surfaces of the back film and the surface protection plate are aligned with each other, the finishing process is easy, and the productivity is improved. If the difference ΔL12 is less than 2 mm, a defect that the back film is shorter than the front protective plate occurs. Conversely, if the difference ΔL12 exceeds 4 mm, the back film protrudes. This is because a film cutting step is required, and the process becomes complicated.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. The description will be specifically made using an embodiment. FIG. 1 is an exploded perspective view showing an exploded schematic configuration of a solar cell module according to one embodiment of the present invention, and FIG. 2 is a diagram showing the size of a translucent glass and a filler used in the method of manufacturing the solar cell module. FIG. 3 is a front view comparing the sizes of the back sheet and the translucent glass used in the method of manufacturing the solar cell module, and FIG.
Is a front view of a solar cell used in the solar cell module, FIG. 5 is a front view showing a cell string in which a plurality of the solar cells are connected, and FIG. FIG. 7 is a cross-sectional view in which a filler is laid on glass, and cell strings of solar cells are arranged and wired on the filler. FIG. 7 is a diagram showing a filler laid on translucent glass used in the solar cell module. FIG. 8 is a front view in which the cell strings of the solar battery cells are arranged and wired on the filler, and FIG. 8 shows another filler placed on the cell strings and the back sheet is placed on the filler. FIG. 9 is a cross-sectional view showing a state (laminate), and FIG. 9 shows a method for manufacturing the solar cell module. Specifically, FIG. 9 is an explanatory view showing a state in which the laminate is sealed around with a laminator. FIG.
0 is a sectional view showing a solar cell module completed by the method for manufacturing the solar cell module.

In the solar cell module 1 of this embodiment, as shown in FIG. 1, a film-like filler 31 (filler on the glass side) is placed on a translucent glass 2, and A plurality of solar cells 5 connected to the
5, ... are arranged. On top of these solar cells 5,5, ...
Another film-like filler (filler on the back film side) 3
After the back film 6 is placed on the filler 32, the whole is heated and pressurized so that both the fillers 31, 32
Is melted to form an integrated filler 3, and at the same time, the filler 3 is bonded to the translucent glass 2, the solar cell 5, and the back film 6, so that the whole is integrated and the periphery is sealed. As shown in FIG. 10, a transparent glass 2, a solar cell 5 sealed with a filler 3, and a back film 6 are laminated in this order, and the periphery is a sealing material 7. The structure is sealed with.

Next, a method of manufacturing the solar cell module 1 having the above configuration will be described with reference to FIGS. First, as shown in FIG. 2, a rectangular translucent glass (white tempered glass plate) 2 having a thickness of approximately 3.2 mm and a rectangular film-like filling having a thickness of approximately 0.6 mm smaller than the translucent glass 2. A material (EVA film) 3 is manufactured. The filler 3 is composed of a filler (glass-side filler) 31 attached to the lower side of the solar cell 5 and a filler backside film-side filler 32 attached to the upper side, both of which have substantially the same size. The filler 3 is used. Further, as shown in FIG.
An m-rectangular back film (polyethylene terephthalate resin (PET) laminated on both sides of an aluminum foil) 6 is manufactured.

The vertical and horizontal dimensions of the translucent glass 2, the film-like filler 3, and the back film 6 are as shown in Table 1. On the other hand, six solar cells (polycrystalline silicon solar cells) 5 shown in FIG. Next, as shown in FIGS. 6 and 7, a film-like filler 31 smaller than the light-transmitting glass 2 is placed on the light-transmitting glass 2 at substantially the center of the light-transmitting glass 2. The cell strings 52 are arranged in six rows and wired as shown in FIG.
Put out.

Next, as shown in FIG. 8, a film-like filler (filler on the back film side) 32 is laid on the light-transmitting glass 2 at substantially the center thereof, and the back film 6 is laid on the filler. It is laid almost at the center of the light glass 2. The filler 32 and the back film 6 have through holes 3 through which lead wires 51 are taken out in advance.
6 and 66 are provided, and the tip 5 of the lead wire 51 is
Issue 5. The laminated material is heated and pressurized by a laminator (not shown) to melt the fillers 31 and 32 and fuse them to form an integrated filler 3. The solar cell 5, the translucent glass 2, and the back film 6 are fused to produce a laminated body 8 integrally formed as a whole. At this time, when the size of the translucent glass 2, the filler 3, and the size of the back film 6 were variously changed and the state of the end face was observed, the results shown in Table 1 were obtained.

[0023]

[Table 1] Judgment ○: No problem, no post-process required ×: Problem (EVA surface exposure, EVA surface concave, etc.) or post-process required

As can be seen from Table 1, when the filler 3 is smaller than the translucent glass 2 by 4 to 8 mm in vertical and horizontal dimensional differences, the end faces are substantially uniform, but the vertical and horizontal dimensional differences are only smaller than 4 mm. Sometimes the filler 3 flows out. Therefore, it is necessary to perform a step of removing “burrs” formed by flowing out the filler 3 in the finishing step. Further, if the filler 3 is made smaller as the vertical and horizontal dimensional difference exceeds 8 mm, the end face portion of the filler 3 becomes concave, and it is not possible to seal well when the peripheral portion in the subsequent process is sealed with the sealing material 7. The problem occurs.

The back film 6 is made of a transparent glass 2
When the difference between the vertical and horizontal dimensions is larger by 2 to 4 mm, the end faces become substantially uniform, but when the difference is smaller than 2 mm, the back film 6 is short, and the filler 3 flows out from this portion. For this reason, there is a problem that the outflowing filler 3 adheres to the fusion furnace, and it is necessary to remove the outflowing filler 3 in a subsequent process. On the other hand, when the vertical and horizontal dimensional difference is greater than 4 mm, the back film 6 flows out from the peripheral portion of the translucent glass 2, and a post-process for cutting this portion is required. On the other hand, when the filler 3 is smaller than the translucent glass 2 by 4 to 8 mm in vertical and horizontal dimensional differences, and the back film 6 is larger by 2 to 4 mm in vertical and horizontal dimensional differences from the translucent glass 2. The end face becomes uniform, and there is no need to remove "burrs" or the back film 6 protruding from the translucent glass, thereby increasing productivity.

As shown in FIG. 9, the laminate 8 manufactured as described above is attached to a RIM mold 81, and a polyol and an isocyanate are mixed together with a catalyst from a polyol tank 82 and an isocyanate tank 83, respectively. While being pressed into the mold 81, the periphery of the laminate 8 is sealed with the sealing material (urethane resin) 7. After that, when the lead wire 51 protruding outside is connected to a terminal box (built-in backflow prevention diode, with connector wiring), or the terminal box is filled with silicone sealant and the lid is tightened, the finishing is performed as shown in FIG. Is completed.

In order to mount the completed solar cell module 1 on a roof 9 of a house or the like, as shown in FIG. 11, a long mounting base 10 having a pair of lower and upper frames is used. 1 is sandwiched between the lower frame and the upper frame of the mounting base 9 so that the solar cell module 1 is mounted on the roof surface.
Support and fix.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. , Included in the present invention. For example, EVA is used as the filler, but other resins may be used. Further, as the back film, one obtained by laminating a polyethylene terephthalate resin (PET) on both sides of an aluminum foil is used, but another film such as a film obtained by laminating a vinyl fluoride on an aluminum foil may be used. Although a polycrystalline silicon solar cell was used as the solar cell, other solar cells, for example,
A single crystal silicon solar cell, an amorphous silicon solar cell, a compound semiconductor solar cell, or the like may be used. Further, although a white reinforced glass plate is used as the translucent glass, another translucent glass may be used.

Further, in the above-described embodiment, the case where the solar cell module is formed in a rectangular shape has been described, but the present invention is not limited to this. In short, the area of the back film before heating and pressing is S
1. The area of the translucent glass is S2, and the cutting area of the filler is S3.
Then, S1>S2> S3, or the dimension of the back film before heating / pressing in any principal direction is L1, the dimension of any principal direction of the translucent glass is L2, and any principal direction of the filler is Is L3>L2> L3, the shape may be triangular, pentagonal or hexagonal, as long as L3>L2> L3.
It may be oval.

Similarly, the difference ΔL23 (= L2−L3) between the dimension L2 of the translucent glass in any principal direction and the dimension L3 of the filler (EVA) in any principal direction is set to 4 to 8 mm. As long as the shape of the translucent glass and the filler (EVA)
The shape is not limited to a square, but may be a triangle, a pentagon, a hexagon, or an ellipse.

Similarly, the difference ΔL12 (= L1−L2) between the dimension L1 of the back film (PET) in any principal direction and the dimension L2 of the translucent glass in any principal direction is 2 to 4 mm.
As long as it is set to, the shape of the back film or translucent glass is not limited to square, it may be triangle, pentagon, hexagon,
It may be oval.

[0032]

As described above, according to the structure of the first aspect, the area and dimensions of the filler before being laminated are smaller than those of the surface protection plate such as a translucent glass.
And, since the area and dimensions of the back film before being laminated are larger than those of the surface protection plate, at the time of manufacturing, a filler is placed on the surface protection plate, and the solar cell is placed on this filler, Furthermore, even if the first and second fillers are melted when the filler is placed on the solar cell and the back film is placed on the filler and heated and pressed, even if the first and second fillers are melted, from the surface protection plate side Also, the filler does not flow out from the back film side. Since the length of the filler flowing out varies depending on the type of the filler, it is preferable to know the distance of the filler flowing out in advance and to reduce the size of the filler by the distance flowing out.

As described above, since the filler does not flow out,
No burrs are generated, and no adhesion to the fusion furnace occurs. Therefore, labor and time for removing the burrs are eliminated, and productivity is improved. Further, since the filler does not flow out, EVA which has been conventionally used and has good adhesiveness can be used as it is without using special EVA having poor adhesiveness, and the occurrence of defective products is eliminated.

According to the second aspect of the present invention, an ethylene-vinyl acetate copolymer (EVA) is used as the first and second fillers, and the dimension L2 of the surface protection plate in an arbitrary main direction can be adjusted. The difference ΔL23 (= L2−L3) from the dimension L3 of the filler (EVA) in any principal direction is 4 to 8 m.
m, for example, when a solar cell module is formed in a square shape, if the difference between the vertical and horizontal dimensions of the surface protection plate and the vertical and horizontal dimensions of the filler (EVA) is set to 4 to 8 mm, heating and heating are performed. The distance at which the filler (EVA) melted under pressure flows out by 2 to 4 mm on both sides in the vertical and horizontal directions (measured value)
Is approximately equal to Therefore, the end faces of the EVA and the surface protection plate become substantially uniform after heating and pressurization, and "burrs" are not generated, so that the time and labor for special finishing can be omitted, and the productivity is improved. If the difference ΔL23 is less than 4 mm, the molten EVA at the time of heating and pressurization may flow out from the peripheral edge of the surface protection plate to generate “burrs” or adhere to the fusion furnace. Therefore, it becomes a process such as "burr removal", and conversely,
If the difference ΔL23 exceeds 8 mm, the filler (EVA)
Is formed inside the peripheral edge of the surface protection plate to form a concave portion. Therefore, when the peripheral edge is sealed with a sealing material in a later step, there is a problem that the sealing becomes difficult.

In the structure of the third aspect, a composite film of a vinyl fluoride resin or a polyethylene terephthalate resin and an aluminum foil is used as the back film, and the size of the back film in any main direction is L1.
Δ between the surface protection plate and the dimension L2 in any main direction of the surface protection plate
L12 (= L1−L2) was set to 2 to 4 mm. This 2
The distance of 4 mm is substantially equal to the distance at which the linear distance becomes shorter due to the fact that the periphery of the flexible back film is curved in the direction of the surface protection plate during heating and pressing. For this reason, the end faces of the back film and the surface protection plate are aligned with each other, so that the finishing process is easy and the productivity is improved. If the difference ΔL12 is less than 2 mm, a defect that the back film is shorter than the front protective plate occurs, and conversely, the difference ΔL12
If L12 exceeds 4 mm, the back film protrudes, so that a step of cutting the back film is required, which becomes complicated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an exploded schematic configuration of a solar cell module according to an embodiment of the present invention.

FIG. 2 is a front view comparing the sizes of a translucent glass and a filler used in the method of manufacturing the solar cell module.

FIG. 3 is a front view comparing the sizes of a back sheet and a translucent glass used in the method of manufacturing the solar cell module.

FIG. 4 is a front view of a solar cell used for the solar cell module.

FIG. 5 is a front view showing a cell string in which a plurality of the solar cells are connected.

FIG. 6 is a cross-sectional view in which a filler is laid on translucent glass used in the solar cell module, and cell strings of solar cells are arranged and wired on the filler.

FIG. 7 is a front view in which a filler is laid on translucent glass used for the solar cell module, and cell strings of solar cells are arranged and wired on the filler.

FIG. 8 is a cross-sectional view showing a state in which another filler is placed on the cell strings and the back sheet is placed on the filler (laminated body).

FIG. 9 is a diagram illustrating a method of manufacturing the solar cell module, specifically, a state in which the laminate is sealed around with a laminator.

FIG. 10 is a sectional view showing a solar cell module completed by the method for manufacturing the solar cell module.

FIG. 11 is an external perspective view of a building showing a state in which many solar cell modules are installed on a roof surface.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Solar cell module 2 Translucent glass (surface protection plate) 3 Filler (film-like EVA) 31 Filler on glass side (first filler) 32 Filler on back film side (second filler) 5 Solar cell 6 Back film

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kimihiko Miyagawa 2-4-4 Nishitenma, Kita-ku, Osaka-shi Sekisui Chemical Co., Ltd. (72) Inventor Shigeru Sugita 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka In the company

Claims (5)

[Claims] 1. A surface protective plate, a first and a second filler, and a backside film having substantially the same shape as each other, a surface transparent protective plate, a first filler, a solar cell, a second filler, and a backside film. After sequentially polymerizing and laminating, the whole is heated and pressurized, and the first
And a method of manufacturing a solar cell module, wherein the first filler is melted and the whole is integrally adhered, wherein the area of the back film before heating and pressing is S1, the area of the surface protection plate is S1. Let S2 be the area of the first and second fillers, and S1>S2> S3. Alternatively, L1 is the dimension of the back film before heating and pressing in any principal direction, and L1 is the size of the surface protection plate. L in any major dimension
2. Assuming that the dimensions of the first and second fillers in any principal direction are L3, the surface protective plate, the first and second fillers, and the back film that satisfy the condition of L1>L2> L3 are: The peripheral edges of the first and second fillers are located inside the peripheral edges of the front surface protection plate and the back film, and the peripheral edges of the front surface protection plate are located at the peripheral edges of the back film. A method for manufacturing a solar cell module, comprising: stacking and laminating them in a manner to come inward from the inside, and then laminating them together. 2. An ethylene-vinyl acetate copolymer is used as the first and second fillers, and a dimension L2 of the surface protective plate in an arbitrary main direction,
Difference ΔL23 from dimension L3 of the second filler in any main direction
The method according to claim 1, wherein (= L2-L3) is set to 4 to 8 mm. 3. A composite film of a vinyl fluoride resin or a polyethylene terephthalate resin and an aluminum foil is used as the backside film, and the dimension of the backside film in any main direction is L1 and any main dimension of the surface protection plate. Difference ΔL12 from dimension L2 in direction
The method according to claim 1, wherein (L1-L2) is set to 2 to 4 mm. 4. The front protective plate, the first and second fillers, and the back film having substantially the same shape as each other are formed of a front transparent protective plate, a first filler, a solar cell, a second filler, and a back film. A solar cell module which is superposed and laminated one after another and is integrally bonded, wherein the area of the back film alone before being integrally bonded is S
1. Assuming that the area of the single surface protection plate is S2 and the area of the first and second fillers is S3, S1>S2> S3 or any main direction of the back film before heating and pressing. Is L1 and the dimension of the surface protection plate in any main direction is L1.
2. When the dimension of the first and second fillers in any principal direction is L3, the surface protection plate satisfying the condition of L1>L2> L3, the first and second fillers,
A solar cell module manufactured using a back film. 5. A roof on which the solar cell module according to claim 4 is installed.