JP2010003861A - Solar-cell module manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve productivity and yield of a solar-cell module by inhibiting contamination on the end face of a translucent substrate due to cutting-off of a sealing resin while allowing a crosslinking reaction of the sealing resin to be surely executed. <P>SOLUTION: A solar-cell module manufacturing method includes a laminate forming step of forming a laminate 20 by laminating a surface sealing resin sheet 12, a solar-cell body 14, a rear-face sealing resin sheet 16, and a rear-face protecting material 18 on a translucent substrate 10, a laminating step of laminating the laminate 20 by pressurization and heating while vacuuming the laminate 20, a cutting-off step of cutting off only a part 24a, protruding from the peripheral edge part of the laminate 20, in a sealing resin material 24, a crosslinking step of crosslinking the sealing resin material 24 by heating the laminate 20, and a second cutting-off step of cutting off a part 18a, protruding from the peripheral edge part of the laminate 20, in the rear-face protecting material 18. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for producing a solar cell module in which at least a translucent substrate, a surface sealing resin sheet, a solar cell element, a back surface sealing resin sheet, and a back surface protective material are laminated.

  In general, solar cells are used outdoors. Therefore, the solar cell is required to have durability with respect to various environments such as humidity and wind and rain.

  For this reason, the solar cell is manufactured as a solar cell module by encapsulating a solar cell body in which a plurality of solar cell elements are connected with a sealing material between the translucent substrate and the back surface protective material.

  In a conventional solar cell module, a sealing resin sheet such as EVA (ethylene-vinyl acetate copolymer), a solar cell body, a sealing resin sheet, and a back sheet are usually laminated on a light-transmitting substrate. The whole was manufactured by heating and pressurizing under reduced pressure.

  However, since the sealing resin is melted by heating and becomes a fluid state, the sealing resin is cast and extended from the region of the glass substrate. In order to provide a solar cell module as a product, it is necessary to cut off the portion of the sealing resin that protrudes from the glass substrate (the melt-extending portion) together with the extra portion of the protective film (the portion that protrudes from the glass substrate). There is.

  The sealing resin and the protective film are cut off using a cutter or the like. Conventionally, the protective film is partially peeled off during cutting, or aligned along the end surface of the glass substrate and cut off the protective film. It was difficult to do so, and the productivity and yield of solar cell modules as products were reduced.

  Therefore, conventionally, for example, Patent Literature 1 and Patent Literature 2 have been proposed in order to prevent the molten resin from protruding as described above.

  In the method according to Patent Document 1, a sealing resin sheet and a protective film having a size larger than that of a glass substrate are laminated, and the sealing resin is softened and melted to be cured. At that time, the extending portion of the sealing resin that extends from the glass substrate due to the melting of the sealing resin, together with the protruding portion of the corresponding protective film, is the softening point of the sealing resin. Excision is performed under the conditions provided for the above temperature.

  The method according to Patent Document 2 is to suppress the light-receiving surface side sealing material and the back surface side sealing material from extending from the peripheral edge of the translucent substrate during lamination of the manufacturing process of the solar cell module. Lamination polymerization is performed with a size of translucent substrate> back surface side sealing material> front surface side sealing material.

JP 2001-53321 A JP-A-2005-44945

  However, as in Patent Document 1, when the sealing resin composed of EVA is cut off at the EVA softening point temperature (77 ° C. or higher), the sealing resin is in a low viscosity state. Therefore, there is a problem that excision becomes difficult and the module is soiled, leading to deterioration of productivity. In addition, since it is necessary to warm the module again after curing, it causes an increase in device cost and affects the solar cell module due to the total heat history.

  Moreover, when the back surface side sealing material and front surface side sealing material comprised by EVA are designed smaller than a cover glass like patent document 2, although a sealing material will reach | attain a cover glass surface, There is a risk that poor adhesion between the end portion of the cover glass and the back sheet surface may occur and reliability may be impaired.

  The present invention has been made in consideration of such problems, and can suppress the occurrence of contamination on the end face of the light-transmitting substrate due to the cutting of the sealing resin, and can also perform a crosslinking reaction of the sealing resin. It is an object of the present invention to provide a method for manufacturing a solar cell module that can be reliably performed and can improve the productivity and yield of the solar cell module.

[1] In the method for producing a solar cell module according to the present invention, a laminated body is produced by laminating a surface sealing resin sheet, a solar cell element, a back surface sealing resin sheet, and a back surface protective material on a translucent substrate. A laminate manufacturing process;
A laminating step of laminating the laminate by performing pressure heating in a state where the laminate is evacuated;
After the laminating step, in the front surface sealing resin sheet and the back surface sealing resin sheet, an excision step of excising only a portion protruding from a peripheral portion of the laminate, and
It has the bridge | crosslinking process of heating the said laminated body which passed through the said cutting process, and bridge | crosslinking the said surface sealing resin sheet and the said back surface sealing resin sheet.

  As a result, it is possible to suppress the occurrence of contamination on the end face of the translucent substrate due to the removal of the sealing resin, and to surely carry out the crosslinking reaction of the sealing resin, thereby improving the productivity of the solar cell module. And the yield can be improved.

[2] In the present invention, in the laminating step, the laminate is heated at a temperature and a time at which the surface sealing resin sheet and the back surface sealing resin sheet have a viscosity but crosslinking has not started. Also good.

  In this case, since the front surface sealing resin sheet and the back surface sealing resin sheet are not cross-linked, they are not in a high-viscosity state, so in the subsequent excision step, only the part protruding from the peripheral edge of the laminate is used. Can be excised easily.

[3] In the present invention, it is preferable that in the laminating step, the laminate is heated at a temperature of 120 ° C. to 130 ° C. for a time of 5 minutes to 10 minutes. Thereby, although the said surface sealing resin sheet and the said back surface sealing resin sheet have viscosity, the bridge | crosslinking can be heated at the temperature and time which have not started bridge | crosslinking. In addition, when the said front surface sealing resin sheet and the said back surface sealing resin sheet are comprised by EVA, the temperature of about 125 degreeC and time within 10 minutes are preferable, for example.

[4] In the present invention, in the laminate produced in the laminate production step, the planar area of the translucent substrate is A1, the planar area of the surface sealing resin sheet is A2, and the planar surface of the solar cell element. When the area is A3, the planar area of the back surface sealing resin sheet is A4, and the planar area of the back surface protective material is A5,
A5>A4>A1>A2> A3
Is preferably satisfied.

  Thereby, when the surface sealing resin sheet and the back surface sealing resin sheet are subjected to a crosslinking reaction, the thickness after crosslinking of the surface sealing resin sheet and the back surface sealing resin sheet exposed from the end surface of the solar cell module. Can be made thinner. That is, the distance (gap) between the peripheral end of the translucent substrate and the peripheral end of the back surface protective material on the end surface of the solar cell module can be reduced. Therefore, it is possible to suppress the intrusion of moisture from the end portion of the solar cell module, which contributes to the improvement of durability.

[5] In this invention, you may make it have a 2nd cutting process which cuts out the part which protruded from the peripheral part of the said laminated body among the said back surface protective materials after the said bridge | crosslinking process.

  In this case, since the protruding portion of the front surface sealing resin sheet and the back surface sealing resin sheet has already been cut out, the protruding portion of the back surface protective material can be easily cut out.

[6] In the present invention, after the cross-linking step, a portion of the back surface protective material that protrudes from the peripheral edge of the laminate is wound so as to cover the end surface of the light-transmitting substrate with the protruding portion. You may make it have a process.

  Thereby, the permeation of moisture from the end of the solar cell module can be further suppressed, which contributes to the improvement of durability.

[7] In the present invention, in the covering step, a sealing material is installed on an end surface of the translucent substrate, and the end surface of the translucent substrate is put together with the sealing material at the protruding portion of the back surface protective material. You may make it wind so that it may coat | cover.

  As a result, the end portion of the solar cell module can be sealed with the back surface protective material and the sealing material, and if the back surface protective material is a type in which aluminum foil is mixed, the moisture resistance is improved. Is also connected.

  As described above, according to the method for manufacturing a solar cell module according to the present invention, it is possible to suppress the occurrence of contamination on the end surface of the light-transmitting substrate accompanying the cutting of the sealing resin, and The crosslinking reaction can be performed reliably, and the productivity of the solar cell module and the yield can be improved.

  Hereinafter, embodiments of a method for manufacturing a solar cell module according to the present invention will be described with reference to FIGS.

  First, a manufacturing method according to the first embodiment (hereinafter referred to as a first manufacturing method) is a surface sealing resin on a translucent substrate 10 as shown in FIG. 2 in step S1 of FIG. The sheet 12, the solar cell body 14, the back surface sealing resin sheet 16, and the back surface protective material 18 are stacked in this order to manufacture the stacked body 20 (laminated body manufacturing process).

  As the translucent substrate 10, a substrate such as glass or polycarbonate resin can be used. In this case, as the glass plate, for example, white plate glass, tempered glass, double tempered glass, heat ray reflective glass or the like is used. For example, white plate tempered glass having a thickness of 3 mm to 5 mm is used. When a resin substrate such as polycarbonate resin is used, a substrate having a thickness of about 5 mm can be used.

  Both the front surface sealing resin sheet 12 and the back surface sealing resin sheet 16 can use a resin sheet composed of an ethylene-vinyl acetate copolymer (EVA), and the thickness is, for example, 0.4 mm or more and 1 mm or less. is there.

  The solar cell main body 14 is configured by arranging a plurality of solar cell elements 22 in, for example, a horizontal direction (also in a vertical direction if necessary).

  As the back surface protective material 18, a fluorine resin sheet having weather resistance in which an aluminum foil is sandwiched so as not to transmit moisture, a polyethylene terephthalate (PET) sheet on which alumina or silica is deposited, and the like can be used.

  These translucent substrate 10, front surface sealing resin sheet 12, solar cell body 14, back surface sealing resin sheet 16 and back surface protective material 18 each have a substantially rectangular shape when viewed from the top surface, The size relationship is as follows.

That is, the planar area of the translucent substrate 10 is A1, the planar area of the surface sealing resin sheet 12 is A2, the planar area of the solar cell body 14 is A3, the planar area of the back surface sealing resin sheet 16 is A4, and the back surface protective material When the plane area of 18 is A5,
A5>A4>A1>A2> A3
To come to be satisfied.

  Thereafter, in step S2 of FIG. 1, the laminated body 20 is put into a vacuum laminator, and the laminated body is laminated by applying pressure and heating in a state where the laminated body 20 is evacuated (lamination process). That is, the translucent substrate 10, the front surface sealing resin sheet 12, the solar cell main body 14, the back surface sealing resin sheet 16, and the back surface protective material 18 that are constituent members of the laminate 20 are bonded together in a vacuumed state.

  In this laminating step, the laminate 20 is heated at a temperature and a time at which the surface sealing resin sheet 12 and the back surface sealing resin sheet 16 have viscosity but crosslinking has not started. Specifically, the laminate 20 is heated at a temperature of 120 ° C. or higher and 130 ° C. or lower for a time of 5 minutes or longer and 10 minutes or shorter.

  Through this laminating step, as shown in FIG. 3A, the peripheral portion of the back surface sealing resin sheet 16 in the laminate 20 is deformed so as to contact the main surface of the translucent substrate 10, and the surface sealing is performed. The sealing resin sheet 12 is combined to form one sealing resin material 24. The peripheral portion of the back surface sealing resin sheet 16 refers to a frame-like region including an inner portion from the periphery of the back surface sealing resin sheet 16. The same applies hereinafter. At this time, the peripheral portion 18a of the back surface protective material 18 and the sealing resin are determined from the size relationship of the planar areas of the translucent substrate 10, the front surface sealing resin sheet 12, the back surface sealing resin sheet 16, and the back surface protective material 18 described above. The peripheral part 24 a of the material 24 protrudes from the peripheral part of the translucent substrate 10. The sealing resin material 24 is heated at a temperature and a time at which the surface sealing resin sheet 12 and the back surface sealing resin sheet 16 have viscosity but crosslinking has not started. In some cases, the sealing resin sheet 16 may be integrated, or in some of the portions where these sheets are in contact with each other, an interface may exist.

  Thereafter, in step S3 of FIG. 1, as shown in FIG. 3B, among the peripheral portion 18 a of the back surface protective material 18 and the peripheral portion 24 a of the sealing resin material 24 that protrudes from the peripheral portion of the translucent substrate 10, sealing is performed. Only the peripheral portion 24a of the resin material 24 is cut out (cutting process). In this case, since the front surface sealing resin sheet 12 and the back surface sealing resin sheet 16 (sealing resin material 24) are not cross-linked and are not in a high viscosity state, the portion protruding from the peripheral portion of the translucent substrate 10 Only the (peripheral portion 24 a of the sealing resin material 24) can be easily cut out along the peripheral edge of the translucent substrate 10, and the residue of the sealing resin material is not present on the end surface 10 a of the translucent substrate 10. It becomes almost nonexistent.

  Thereafter, in step S4 of FIG. 1, the laminated body 20 from which only the peripheral portion 24a of the sealing resin material 24 is cut is put into a heating furnace, the laminated body 20 is heated in the heating furnace, and the sealing resin material 24 curing is completed (crosslinking step). This heat treatment is performed at a temperature and time at which the encapsulating resin material causes a crosslinking reaction. Specifically, it is performed at a temperature of 140 ° C. or more and a time of 10 minutes or more and 120 minutes or less.

  Usually, in the heat treatment in which the sealing resin material 24 is subjected to a crosslinking reaction, the crosslinking agent mixed in the sealing resin material 24 is thermally decomposed, and radicals generated by the thermal decomposition (crosslinking contributing radicals) are low molecular weight EVA. It acts on (the sealing resin material) and crosslinks. Therefore, if the sealing resin material 24 is not sandwiched between other members, the crosslinking contributing radicals are scattered in the air, causing a problem that the crosslinking reaction does not proceed.

  Further, if there is a residue of the sealing resin material 24 on the end face 10a of the translucent substrate 10, since this residue is in contact with air, the cross-linking reaction hardly proceeds and a so-called poor cross-linking occurs. . When the laminated body 20 is made into a solar cell module, the cross-linking failure residue may cause an appearance or a sealing failure such as melting or adhering to other members.

  However, in this first manufacturing method, since the heat treatment is performed while the back surface protective material 18 is not cut off, the heat treatment is performed while protruding from the laminated body 20, the back surface protective material 18 covers the sealing resin material 24. Since it plays a role, the crosslinking-contributing radicals do not scatter in the air, but efficiently act on low molecular weight EVA (encapsulating resin material) to crosslink.

  Further, since there is almost no residue of the sealing resin material 24 on the end face 10a of the translucent substrate 10, the above-described inconvenience due to poor crosslinking of the residue can be avoided.

  Thereafter, in step S5 of FIG. 1, as shown in FIG. 3C, the portion of the back surface protective material 18 that protrudes from the peripheral portion of the stacked body 20 (the peripheral portion 18a of the back surface protective material) is excised (second excision step). ). In this case, since the protruding portion of the sealing resin material 24 has already been cut, the protruding portion 18 a of the back surface protective material 18 can be easily cut along the peripheral edge of the translucent substrate 10. At this stage, the solar cell module 30 is completed.

  Thereafter, in step S6 of FIG. 1, although not shown, a sealing member such as butyl rubber or resin foam is wound around the entire peripheral edge of the solar cell module 30, and a frame is attached so as to cover the sealing member. Then, the peripheral portion of the solar cell module 30 is sealed (sealing step).

  As described above, in the first manufacturing method, it is possible to suppress the occurrence of contamination on the end surface 10a of the translucent substrate 10 due to the cutting of the sealing resin material 24, and to perform the crosslinking reaction of the sealing resin material 24. Thus, the productivity of the solar cell module 30 and the yield can be improved.

In particular, the planar areas A1 to A5 of the translucent substrate 10, the surface sealing resin sheet 12, the solar cell main body 14, the back surface sealing resin sheet 16, and the back surface protection material 18 that constitute the laminate 20,
A5>A4>A1>A2> A3
To come to be satisfied.

  Thereby, when the front surface sealing resin sheet 12 and the back surface sealing resin sheet 16 (sealing resin material 24) are subjected to a crosslinking reaction, the thickness of the sealing resin material 24 exposed from the end surface of the solar cell module 30 after crosslinking. Can be made thinner. That is, the distance (gap) between the peripheral edge of the translucent substrate 10 and the peripheral edge of the back surface protection member 18 at the end face of the solar cell module 30 can be reduced. Therefore, the infiltration of moisture from the end of the solar cell module 30 can be suppressed, which contributes to the improvement of durability.

  Here, one experimental example is shown. This experimental example is a comparative example (samples 1 to 4), example 1 (samples 101 to 104), and example 2 (samples 201 and 202). The change of

  In the comparative example, as shown in FIG. 4A, the planar area A2 of the front surface sealing resin sheet 12 and the planar area A4 of the back surface sealing resin sheet 16 were the same, and a solar cell module was manufactured by the first manufacturing method. The edge part structure of the solar cell module which concerns on the produced comparative example is shown to FIG. 5A.

  In Example 1, as shown in FIG. 4B, the peripheral portion is reduced by about 5 mm with respect to the size of the surface sealing resin sheet 12 of the comparative example, and the planar area A2 of the surface sealing resin sheet 12 and the back surface sealing resin A solar cell module was manufactured by the first manufacturing method with the relationship of the planar area A4 of the sheet 16 being A4> A2.

  In Example 2, as shown in FIG. 4C, the peripheral portion is reduced by about 7.5 mm with respect to the size of the front surface sealing resin sheet 12 of the comparative example, and the planar area A2 and the rear surface sealing of the front surface sealing resin sheet 12 are reduced. A solar cell module was manufactured by the first manufacturing method with the relationship of the planar area A4 of the resin-resin sheet 16 being A4> A2. 4A to 4C, the back surface protective material is omitted.

  The edge part structure of the solar cell module which concerns on produced Example 1 and 2 is shown to FIG. 5B. The end structure of the solar cell module according to the example, in particular, the gap G1 between the peripheral end of the translucent substrate 10 and the peripheral end of the back surface protective material 18 is approximately less than the gap G2 of the comparative example (see FIG. 5A). It is about 1/5 narrower.

  In both the comparative example and the example, two resistors are installed at a position 17.5 mm deep from the end surface of the translucent substrate 10 in one main surface of the translucent substrate 10, and the voltage between both ends of each resistor is set. Was measured, and the resistance change rate of the peripheral portion in the comparative example and the example was determined. FIG. 6 shows changes in the resistance change rate for 1000 hours (endurance time) in a high-temperature and high-humidity atmosphere at 85 ° C. and 85% RH in the comparative example and the example. The smaller the change in resistance change rate, the smaller the amount of moisture intrusion.

  As shown in FIG. 6, the rate of change in resistance changes by changing the planar area A2 of the surface sealing resin sheet 12, and in particular, the change in the rate of resistance change as the planar area A2 of the surface sealing resin sheet 12 decreases. Is small. This is because the smaller the planar area A2 of the front surface sealing resin sheet 12, the smaller the gap between the peripheral edge of the translucent substrate 10 and the peripheral edge of the back surface protective material 18, thereby allowing moisture to enter. It is thought to be suppressed.

  Next, a manufacturing method according to the second embodiment (hereinafter referred to as a second manufacturing method) will be described with reference to FIGS.

  First, Steps S101 to S104 are the same as Steps S1 to S4 of the first manufacturing method described above, and thus a duplicate description thereof is omitted.

  After the cross-linking process in step S104 in FIG. 7 is completed, in the next step S105, as shown in FIG. 8, the portion 18a that protrudes from the peripheral edge portion of the laminated body 20 of the back surface protective material 18 protrudes. It winds so that the end surface (side surface) of the translucent board | substrate 10 may be coat | covered with the part 18a (coating process). In particular, in the second manufacturing method, the sealing material 32 is provided on the end surface of the translucent substrate 10, and the end surface of the translucent substrate 10 is covered together with the sealing material 32 with the protruding portion 18 a of the back surface protection material 18. Like to wind. At this stage, the solar cell module 30 is completed.

  Thereafter, as shown in step S106 of FIG. 7, a sealing member such as butyl rubber or a resin foam is wrapped around the entire peripheral edge of the solar cell module 30, and a frame is attached so as to cover the sealing member. The periphery of the laminate is sealed (sealing step).

  In the second manufacturing method, since the end portion of the solar cell module 30 can be sealed with the back surface protective material 18 and the sealing material 32, double sealing is performed together with sealing with the sealing member performed in step S106. A structure can be realized. Moreover, if the back surface protective material 18 is of a type in which aluminum foil is mixed, the moisture resistance is improved.

  In addition, the manufacturing method of the solar cell module which concerns on this invention is not restricted to the above-mentioned embodiment, Of course, various structures can be taken, without deviating from the summary of this invention.

It is a process block diagram showing the 1st manufacturing method. It is sectional drawing which abbreviate | omits and partially shows the state which laminated | stacked the surface sealing resin sheet, the solar cell main body, the back surface sealing resin sheet, and the back surface protection material in this order on the translucent board | substrate. . FIG. 3A is a cross-sectional view showing the laminated body partially omitted, and FIG. 3B is a cross-sectional view showing only a part of the sealing resin material protruding from the periphery of the laminated body. FIG. 3C is a cross-sectional view illustrating a state in which a part of the back surface protective material that has protruded from the periphery of the laminated body is cut out after the laminated body is subjected to heat treatment (crosslinking of the sealing resin material). is there. 4A is a cross-sectional view showing a comparative example (samples 1 to 4) with a part of the laminated body omitted, and FIG. 4B shows a part of the laminated body according to Example 1 (samples 101 to 104). FIG. 4C is a cross-sectional view in which a part of the laminate according to Example 2 (Samples 201 and 202) is omitted. FIG. 5A is a cross-sectional view showing an end structure of a solar cell module according to a manufactured comparative example, and FIG. 5B is a cross-sectional view showing an end structure of the solar cell module according to manufactured examples 1 and 2. . It is a graph which shows the change of the resistance change rate with respect to the durable time of a comparative example and Examples 1 and 2. It is a process block diagram showing the 2nd manufacturing method. It is sectional drawing which abbreviate | omits and shows the solar cell module produced by the 2nd manufacturing method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Translucent board | substrate 12 ... Surface sealing resin sheet 14 ... Solar cell main body 16 ... Back surface sealing resin sheet 18 ... Back surface protective material 20 ... Laminated body 22 ... Solar cell element 24 ... Sealing resin material 30 ... Solar cell module

Claims (7)

On the translucent substrate, a laminate production step of producing a laminate by laminating a surface sealing resin sheet, a solar cell element, a back surface sealing resin sheet, and a back surface protective material;
A laminating step of laminating the laminate by performing pressure heating in a state where the laminate is evacuated;
After the laminating step, in the front surface sealing resin sheet and the back surface sealing resin sheet, an excision step of excising only a portion protruding from a peripheral portion of the laminate, and
A method of manufacturing a solar cell module, comprising: a crosslinking step of heating the laminated body that has undergone the cutting step to crosslink the front surface sealing resin sheet and the back surface sealing resin sheet. In the manufacturing method of the solar cell module of Claim 1,
The laminating step includes heating the laminated body at a temperature and a time at which the surface sealing resin sheet and the back surface sealing resin sheet have viscosity but crosslinking has not started. Method. In the manufacturing method of the solar cell module of Claim 1 or 2,
In the laminating step, the laminate is heated at a temperature of 120 ° C. or higher and 130 ° C. or lower for a time of 5 minutes or longer and 10 minutes or shorter. In the manufacturing method of the solar cell module of any one of Claims 1-3,
The laminate produced in the laminate production step has a plane area of the translucent substrate of A1, a plane area of the surface sealing resin sheet of A2, a plane area of the solar cell element of A3, and the back surface sealing. When the plane area of the stop resin sheet is A4 and the plane area of the back surface protective material is A5,
A5>A4>A1>A2> A3
The manufacturing method of the solar cell module characterized by satisfying these. In the manufacturing method of the solar cell module of any one of Claims 1-4,
The manufacturing method of the solar cell module characterized by having the 2nd cutting process which cuts out the part which protruded from the peripheral part of the said laminated body among the said back surface protection materials after the said bridge | crosslinking process. In the manufacturing method of the solar cell module of any one of Claims 1-4,
After the cross-linking step, a portion of the back surface protective material that protrudes from the peripheral edge of the laminated body is covered with a covering step that covers the end surface of the light-transmitting substrate with the protruding portion. A method for manufacturing a solar cell module. In the manufacturing method of the solar cell module according to claim 6,
The covering step includes setting a sealing material on an end surface of the translucent substrate, and winding the end surface of the translucent substrate together with the sealing material at the protruding portion of the back surface protective material. A method for producing a solar cell module.

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