JP2010177307A - Solar cell module, frame for solar cell panel, and manufacturing method of them - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the occurrence of discharge by insulating a pace between a rear surface protection layer of a solar cell panel and a frame member over a wide range without using sealants by a simple configuration and a simple manufacturing process. <P>SOLUTION: Spaces between side edge parts of a solar cell panel 2 and groove portions 22 of a frame member 21 are filled with a hot melt adhesive 31 to form an insulating layer formed with the hot melt adhesive 31 between them. This insulating layer is capable of sufficiently insulating the side edge parts of the solar cell panel 2 and the groove portions 22 of the frame member 21 from each other. The hot melt adhesive 31 is not only interposed between the side edge parts of the solar cell panel 2 and the groove portions 22 of the frame member 21 but also applied so as to overflow to sidewall surfaces 21i beyond edge sides of inner walls 21b of the groove portions 22. Therefore, the insulating layer is interposed also between an Al layer of a rear surface protection layer 17 and the sidewall surfaces 21i of the frame member 21 to improve insulation between them, and discharge is difficult to occur between the Al layer and the sidewall surfaces 21i also. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a solar cell module that converts sunlight into electric power, a solar cell panel frame used in the solar cell module, and a method for manufacturing the same.

  As this type of conventional solar cell module, there is one described in Patent Document 1, for example, which is configured as shown in FIG. In FIG. 10, a solar cell module 101 includes a solar cell panel 105 formed by laminating a transparent substrate 102 such as a polymer or glass, a solar cell 103, a back surface protective layer (also referred to as a back film or a back skin) 104, and the like. In addition, the frame member 106 made of aluminum is used, and the edge portion of the solar cell panel 105 is edged and held by the frame member 106. Moreover, the edge part of the solar cell panel 105 is sealed with the sealing material 107, and the sealing material 107 is interposed between the edge part of the solar cell panel 105 and the frame member 106 to insulate them from each other.

JP 2007-19545 A

  By the way, a back surface protective layer 104 is laminated on the back surface side of the solar cell panel 105 having the above laminated structure to ensure moisture resistance. The back surface protective layer 104 has a three-layer structure such as PET / Al / PET (PET: polyethylene terephthalate, Al: aluminum). This is because even if PET alone can prevent the intrusion of water droplets, it cannot prevent the intrusion of water vapor, and a metal Al layer is indispensable to prevent the intrusion of water vapor.

  However, since the Al layer of the back surface protective layer 104 is electrically floating, charges are easily accumulated here. Moreover, as is apparent from FIG. 10, the Al layer of the back surface protective layer 104 is on the back surface side of the solar cell panel 105, and this Al layer is disposed close to the aluminum frame member 106 of the solar cell panel 105. For this reason, discharge may occur between the Al layer of the back surface protective layer 104 and the frame member 106. Since the sealing material 107 is interposed between the edge portion of the solar cell panel 105 and the frame member 106, the portion P where the sealing material 107 does not exist even though sufficient insulation is ensured and discharge is difficult to occur. In, discharge is likely to occur.

  In order to prevent such discharge between the Al layer of the back surface protective layer 104 and the frame member 106, it is conceivable to expand the arrangement range of the sealing material 107.

  However, the sealing material 107 not only insulates the edge portion of the solar cell panel 105 from the frame member 106 but also functions to seal the edge portion of the solar cell panel 105 and insulates the bent surface. Further, in order to seal, it is necessary to apply a sufficient amount of adhesive on both sides, and the assembly process takes time. Making the arrangement range of the sealing material 107 wider is not preferable because it increases man-hours and costs.

  Accordingly, the present invention has been made to solve the above-described problems, and insulates the back surface protective layer of the solar cell panel and the frame member over a wide range with a simple configuration and manufacturing process without using a sealing material. Then, it aims at providing the solar cell module which can prevent generation | occurrence | production of discharge, the frame for solar cell panels, and those manufacturing methods.

  In order to solve the above-described problems, a solar cell module of the present invention includes a solar cell panel having a laminated structure including at least solar cells and a back surface protection sheet, and a frame member that supports the edge of the solar cell panel. In the solar cell module in which the edge of the solar cell panel is inserted and supported in the groove formed on the side wall of the frame member, one of the inner walls on both sides of the groove sandwiching the edge of the solar cell panel is The other side is the solar cell panel light-receiving surface side on the back side of the solar cell panel, and an adhesive having an insulating property is interposed between the edge of the solar cell panel and the groove of the frame member. The edge portion is sealed, and this adhesive is applied so as to overflow from one inner wall edge on the back surface side of the solar cell panel in the groove to the side wall surface of the frame member.

  One inner wall of the groove on the back side of the solar cell panel is set lower in the depth direction of the groove than the other inner wall of the groove on the light-receiving surface side of the solar cell panel.

  For example, the adhesive is a hot melt adhesive.

  Next, the frame for a solar cell panel of the present invention includes a frame member that supports a peripheral portion of a solar cell panel having a laminated structure including at least a solar cell and a back surface protection sheet. In the solar cell panel frame in which a groove for inserting and supporting the edge of the battery panel is formed, one of the inner walls on both sides of the groove sandwiching the edge of the solar cell panel is the back side of the solar cell panel The other is on the light-receiving surface side of the solar cell panel, and an insulating adhesive is poured into the groove and is dammed by the other inner wall on the light-receiving surface side of the solar cell panel in the groove, and in the groove It is applied so as to overflow from one inner wall edge on the back side of the solar cell panel to the side wall surface of the frame member.

  One inner wall of the groove on the back side of the solar cell panel is set lower in the depth direction of the groove than the other inner wall of the groove on the light-receiving surface side of the solar cell panel.

  Further, an acute angle is formed at a corner portion between one inner wall on the back side of the solar cell panel in the groove and the side wall of the frame member.

  Moreover, the corner part between one inner wall in the said solar cell panel back surface side in the said groove | channel and the side wall of the said frame member is formed in the gentle bending surface.

  For example, the adhesive is a hot melt adhesive.

  Next, the manufacturing method of the solar cell module of the present invention includes a solar cell panel having a laminated structure including at least a solar cell and a back surface protection sheet, and a frame member that supports the edge portion of the solar cell panel, In the method for manufacturing a solar cell module in which the edge portion of the solar cell panel is inserted and supported in the groove formed on the side wall of the member, one of the inner walls on both sides of the groove that sandwiches the edge portion of the solar cell panel Is on the back surface side of the solar cell panel and the other is on the light receiving surface side of the solar cell panel, and the adhesive having an insulating property is applied to the corner portion between the one inner wall on the back surface side of the solar cell panel and the side wall of the frame member It is swept down, poured into the groove, blocked by the other inner wall on the light receiving surface side of the solar cell panel in the groove, and one of the inner surfaces on the back side of the solar cell panel in the groove It is applied so as to overflow from the edge to the side wall surface of the frame member, the edge of the solar cell panel is inserted into the groove of the frame member, and the edge of the solar cell panel is sandwiched between the inner walls on both sides of the groove The edge of the solar cell panel is sealed and fixed with an adhesive.

  For example, the adhesive is a hot melt adhesive.

  Next, the manufacturing method of the frame for a solar cell panel of the present invention includes a frame member that supports a peripheral portion of a solar cell panel having a laminated structure including at least a solar cell and a back surface protection sheet, and the side wall of the frame member In the method for manufacturing a solar cell panel frame in which a groove for inserting and supporting the edge of the solar cell panel is formed, one of the inner walls on both sides of the groove sandwiching the edge of the solar cell panel Is on the back surface side of the solar cell panel and the other is on the light receiving surface side of the solar cell panel, and the adhesive having an insulating property is applied to the corner portion between the one inner wall on the back surface side of the solar cell panel in the groove and the side wall of the frame member. It flows down and flows into the groove, is dammed by the other inner wall of the groove on the light receiving surface side of the solar cell panel, and forward from the edge of the inner wall of the groove on the back side of the solar cell panel It is coated to overflow into the side wall surface of the frame member.

  For example, the adhesive is a hot melt adhesive.

  In the solar cell module of the present invention, an insulating adhesive is interposed between the edge of the solar cell panel and the groove of the frame member, and the edge of the solar cell panel is sealed with this adhesive. Since the adhesive has fluidity, it easily enters between the groove of the frame member and the edge of the solar cell panel, ensures high insulation between the frame member and the solar cell panel, and the side of the solar cell panel. Seal the edges well.

  If one of the inner walls on both sides of the groove sandwiching the edge of the solar cell panel is on the back side of the solar cell panel and the other is on the light receiving surface side of the solar cell panel, the adhesive is a solar cell in the groove of the frame member. It is applied so as to overflow from one inner wall edge on the back side of the panel to the side wall surface of the frame member. Therefore, the arrangement range of the adhesive between the back surface side of the solar cell panel and the side wall surface of the frame member is expanded, and the insulation between the back surface side of the solar cell panel and the frame member is ensured in a wide range by the adhesive. For this reason, even if the moisture-proof metal layer is laminated | stacked on the back surface side of a solar cell panel, it becomes difficult to produce the discharge between a solar cell panel back surface side and a frame member.

  Furthermore, since the sealant and the adhesive are not used together as in the prior art and only the adhesive is used, man-hours and costs can be reduced.

  That is, although only the adhesive is used, the edge portion of the solar cell panel can be fixed and sealed, the insulation can be improved, and the man-hours and costs can be reduced.

  For example, one inner wall of the groove on the back surface side of the solar cell panel is set lower in the depth direction of the groove than the other inner wall of the groove on the light-receiving surface side of the solar cell panel. The height difference between the inner walls on both sides of the groove is set in order to dam the adhesive by the other inner wall or to easily overflow the adhesive from the edge of one inner wall.

  Moreover, a hot melt adhesive can be applied as the adhesive. This hot melt adhesive is melted and liquefied when heated, and solidifies when cooled to a specified temperature or lower.

  Next, in the solar cell panel frame of the present invention, a groove for inserting and supporting the edge of the solar cell panel is formed on the side wall of the frame member. Then, an adhesive having an insulating property is poured into the groove, is blocked by the other inner wall on the solar cell light-receiving surface side in the groove, and is one inner wall edge on the back surface side of the solar cell panel in the groove To the side wall surface of the frame member.

  In the state where the edge of the solar cell panel is inserted and supported in the groove of the frame member, an adhesive is interposed between the groove of the frame member and the edge of the solar cell panel, so that the frame member and the solar cell are interposed. The panels are insulated and the adhesive is brought into close contact with the edge of the solar cell panel to seal the edge of the solar cell panel. Since the adhesive has fluidity, it easily enters between the groove of the frame member and the edge of the solar cell panel, ensures high insulation between the frame member and the solar cell panel, and the side of the solar cell panel. Seal the edges well.

  In addition, since the adhesive overflows from the edge of one inner wall on the back side of the solar cell panel to the side wall of the frame member, the adhesive ensures a wide range of insulation between the back side of the solar cell panel and the frame member. The For this reason, even if the moisture-proof metal layer is laminated | stacked on the back surface side of a solar cell panel, it becomes difficult to produce the discharge between a solar cell panel back surface side and a frame member.

  Furthermore, since it is not necessary to use a sealing material and an adhesive together as in the prior art, and only the adhesive is used, man-hours and costs can be reduced.

  That is, although only the adhesive is used, the edge portion of the solar cell panel can be fixed and sealed, the insulation can be improved, and the man-hours and costs can be reduced.

  Also, one inner wall on the back side of the solar cell panel in the groove is made lower in the depth direction of the groove than the other inner wall on the light receiving surface side in the groove, and the other inner wall dams the adhesive. It is easy to stop or overflow the adhesive from the edge of one inner wall.

  In addition, an acute angle is formed at the corner between the inner wall on the back side of the solar cell panel in the groove and the side wall of the frame member. In this case, when the adhesive drips down to the corner portion, the adhesive is easily divided into two flows by the corner tip forming an acute angle of the corner portion, and the adhesive of one flow is the back side of the solar cell panel in the groove Overflowing from one inner wall edge to the side wall surface of the frame member, the other flow of adhesive flows into the groove and is blocked by the other inner wall of the groove on the light-receiving surface side of the solar cell panel. Such a configuration is particularly effective when the adhesive has a high viscosity.

  Or the corner part between one inner wall and the side wall of a frame member in the solar cell panel back surface side in a groove | channel is formed in the gentle bending surface. In this case, the adhesive is not divided at the corner portion, and a continuous adhesive layer, that is, a continuous insulating layer can be easily formed. Such a configuration is particularly effective when the adhesive has a low viscosity.

  In addition, as the adhesive, a hot melt adhesive that melts into liquid when heated and solidifies when cooled is applied. In this case, the hot melt adhesive is applied to the frame member in a state where the hot melt adhesive is heated and melted. In addition, since the solid state of the hot melt adhesive is maintained at room temperature, it is possible to store, transport, deliver, etc. a solar cell panel frame formed by applying the hot melt adhesive to the frame member.

  Next, in the manufacturing method of the solar cell module of the present invention, the insulating adhesive is dripped down to the corner portion between the one inner wall on the back surface side of the solar cell panel and the side wall of the frame member in the groove of the frame member. This adhesive is divided into two flows at the corner, and the adhesive of one flow overflows from the edge of one inner wall on the back side of the solar cell panel in the groove to the side wall surface of the frame member, and the other flow adheres The agent flows into the groove and is blocked by the other inner wall of the groove on the light-receiving surface side of the solar cell panel. Therefore, the adhesive is poured into the groove only by dripping down the adhesive, and is blocked by the other inner wall of the groove on the light receiving surface side of the solar cell panel, and on the back surface side of the solar cell panel in the groove. It is applied so as to overflow from one inner wall edge to the side wall surface of the frame member.

  Thereafter, the edge of the solar cell panel is inserted into the groove of the frame member, the edge of the solar cell panel is sandwiched between the inner walls on both sides of the groove, and the edge of the solar cell panel is sealed with an adhesive. And fix. As a result, an adhesive is interposed between the frame member and the edge of the solar cell panel, the space between the two is insulated, and the adhesive is in close contact with the edge of the solar cell panel. The part is sealed. In addition, since the adhesive overflows from the edge of one inner wall on the back side of the solar cell panel to the side wall of the frame member, the adhesive ensures a wide range of insulation between the back side of the solar cell panel and the frame member. , It becomes difficult for discharge between the back surface side of the solar cell panel and the frame member to occur.

  When a hot melt adhesive is applied as an adhesive, it is possible to store, transport, deliver, etc. a solar panel frame formed by applying a hot melt adhesive to a frame member as described above. A step of applying the agent to the groove of the frame member and the side wall surface, a step of inserting the edge of the solar cell panel into the groove of the frame member, and sealing and fixing the edge of the solar cell panel with an adhesive Can be performed at different locations and times.

  Next, in the method for manufacturing a solar cell panel frame according to the present invention, as in the method for manufacturing a solar cell module according to the present invention, the insulating adhesive is on the back surface side of the solar cell panel in the groove of the frame member. Since the adhesive drips down on the corner between the inner wall of the frame member and the side wall of the frame member, the adhesive is poured into the groove, and the other inner wall on the solar cell panel light receiving surface side in the groove. It is dammed and applied so as to overflow from one inner wall edge on the back surface side of the solar cell panel in the groove to the side wall surface of the frame member.

  In addition, as the adhesive, a hot melt adhesive that melts into liquid when heated and solidifies when cooled is applied. In this case, the hot melt adhesive is applied to the frame member in a state where the hot melt adhesive is heated and melted. Further, at room temperature, it is possible to store, transport, deliver, etc. a solar cell panel frame formed by applying a hot melt adhesive to the frame member.

1 is a perspective view of one embodiment of a solar cell module of the present invention, showing the solar cell module as viewed from the back side. It is sectional drawing which expands and shows the edge part of the solar cell panel in FIG. It is sectional drawing which expands and shows the frame member of the state before attaching the solar cell panel in FIG. It is sectional drawing which expands and shows the state which inserted the edge part of the solar cell panel in the groove | channel of the frame member. It is a disassembled perspective view which shows the attachment state of the two frame members with respect to the two edge parts of a solar cell panel. (A)-(c) is a figure which shows one Embodiment of the manufacturing method of the frame for solar cell panels of this invention, and a solar cell module. It is sectional drawing which shows the modification of a frame member typically. It is sectional drawing which shows the other modification of a frame member typically. It is sectional drawing which shows another modification of a frame member typically. It is sectional drawing which expands and shows the edge part of the conventional solar cell module.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing an embodiment of the solar cell module of the present invention, and shows the solar cell module as viewed from the back side. As shown in FIG. 1, the solar cell module 1 is spanned between a solar cell panel 2, a frame 3 that holds the periphery of the solar cell panel 2 and a pair of opposing frame members 21, and And a beam 4 that supports the back side of the battery panel 2.

  FIG. 2 is an enlarged cross-sectional view showing an end portion of the solar cell panel 2. As shown in FIG. 2, the solar battery panel 2 is formed by sequentially laminating a transparent electrode film 12 made of a transparent conductive film, a photoelectric conversion layer 13, and a back electrode film 14 on a light-transmitting insulating substrate 11. Further, a sealing film 16 and a back surface protective layer 17 for ensuring weather resistance and high insulation are laminated on the back electrode film 14, and the entire laminated structure is laminated and integrated. Is.

A heat-resistant resin such as glass or polyimide is applied to the translucent insulating substrate 11. For the transparent electrode film 12, SnO ₂ , ZnO, ITO or the like is applied. For the photoelectric conversion layer 13, a silicon-based photoelectric conversion film such as amorphous silicon or microcrystalline silicon, or a compound-based photoelectric conversion film such as CdTe or CuInSe ₂ is applied. A ZnO transparent electrode film, a silver thin film, or the like is applied to the back electrode film 14. As the sealing film 16, a thermoplastic polymer film is preferable, and a film made of EVA (ethylene vinyl acetate resin) or PVB (polyvinyl butyral resin) is particularly optimal. The back surface protective layer 17 has a three-layer structure of PET / Al / PET (PET: polyethylene terephthalate, Al: aluminum) or a three-layer structure of PVF / Al / PVF (PVF: polyvinyl fluoride resin). This is because even if PET or PVF alone can prevent the ingress of water droplets, it cannot prevent the invasion of water vapor, and a metal Al layer is indispensable to prevent the invasion of water vapor. .

  The frame body 3 shown in FIG. 1 has four frame members 21 attached along the four edge portions of the solar cell panel 2 and the ends of the frame members 21 connected to each other. The periphery of the solar cell panel 2 is held inside the member 21. The frame 3 protects the solar cell panel 2 and increases the rigidity and strength of the entire solar cell module 1, so that the solar cell module 1 can be attached to a roof or the like for use.

  FIG. 3 shows an enlarged cross-sectional structure of the frame member 21 in a state before the solar cell panel 2 is attached. The frame member 21 is formed by extrusion of aluminum, and protrudes on the extension of the rectangular main body 21a and the inner wall 21b of the rectangular main body 21a, and is a locking portion that is bent downward during the extension. 21c and a groove frame portion 21e that protrudes on the extension of the side wall 21d of the rectangular main body 21a and is bent so as to be parallel to the inner wall 21b in the middle of the extension.

  The groove frame portion 21 e extends in the longitudinal direction of the rectangular main body 21 a, and the inside is a groove 22. It can be said that the groove 22 is formed in the side wall 21 g of the frame member 21.

  The inner walls 21b and 21h on both sides of the groove 22 have different heights, and the inner wall 21b is lower than the inner wall 21h in the depth direction of the groove 22.

  A hot melt adhesive 31 is poured into the groove 22. The hot melt adhesive 31 is poured to the middle of the depth of the groove 22 and is applied over the edge of the lower inner wall 21b to the side wall surface 21i.

  The hot melt adhesive 31 is an adhesive that melts and liquefies when heated and solidifies when cooled, and maintains a solidified state at room temperature. Here, the hot melt adhesive 31 is used as an insulating material between the edge portion of the solar cell panel 2 and the frame member 21 and as a sealing member for the edge portion of the solar cell panel 2. For this reason, the hot melt adhesive 31 is preferably made of a material excellent in insulation, weather resistance, and adhesion. For example, a polyolefin resin hot melt adhesive that is in a molten state at 120 ° C. to 150 ° C. is suitable.

  The temperature of the solar cell panel 2 installed outdoors reaches 90 ° C. to 110 ° C. at the maximum, but such a hot melt adhesive maintains a sufficient solidified state (adhered state) and has sufficient reliability. Sex can be secured.

  FIG. 4 is an enlarged cross-sectional view showing a state in which the edge portion of the solar cell panel 2 is inserted into the groove 22 of the frame member 21.

  As described above, the hot melt adhesive 31 is melted and liquefied when heated and solidified when cooled. For this reason, immediately before inserting the edge part of the solar cell panel 2 into the groove 22 of the frame member 21, the frame member 21 is heated to liquefy the hot melt adhesive 31 to such an extent that its viscosity does not decrease too much. The edge part of the solar cell panel 2 is also heated to a temperature similar to that of the hot melt adhesive 31.

  In this state, when the edge of the solar cell panel 2 is inserted into the groove 22 of the frame member 21 as shown in FIG. 4, the hot melt adhesive 31 in the groove 22 is pushed away by the edge of the solar cell panel 2. Meanwhile, the hot melt adhesive 31 is in close contact with the edge of the solar cell panel 2, and the space between the edge of the solar cell panel 2 and the groove 22 is filled with the hot melt adhesive 31. At this time, the light receiving surface of the solar cell panel 2 is directed toward the higher inner wall 21h, that is, the outside, and the back surface of the solar cell panel 2 is directed toward the lower inner wall 21b, that is, the inside.

  Then, when the solar cell panel 2 and the frame member 21 are cooled while the edge portion of the solar cell panel 2 is inserted into the groove 22 of the frame member 21, the hot melt adhesive 31 is solidified and the sides of the solar cell panel 2 are solidified. The edge portion is firmly bonded to the groove 22 of the frame member 21, and the edge portion of the solar cell panel 2 is sealed.

  FIG. 5 is an exploded perspective view showing how the two frame members 21 are attached to the two edge portions of the solar cell panel 2. In practice, it is necessary to attach four frame members 21 to the four edge portions of the solar cell panel 2.

  As described above, each frame member 21 is heated so that the hot melt adhesive 31 of each frame member 21 is liquefied to such an extent that the viscosity does not decrease too much, and each edge portion of the solar cell panel 2 is also hot. Each edge part of the solar cell panel 2 is inserted into the groove 22 of each frame member 21 in a state heated to the same temperature as the melt adhesive 31. And as shown in FIG. 5, the edge part of the two frame members 21 is mutually connected for every corner | angular part of the solar cell panel 2, and the corner | angular part of the solar cell panel 2 is protected by two frame members.

  As is clear from FIG. 5, at one end of the two frame members 21, the rectangular main body 21a is cut away, leaving only the side wall 21d, and two holes 21j are formed in the remaining side wall 21d. Is formed. The end of the other frame member 21 is brought into contact with the remaining side wall 21d, and two screws (not shown) are inserted into the respective holes 21j of the remaining side wall 21d. The end portions of the two frame members 21 are connected to each other by screwing into each screwing portion 21k of the member 21.

  When mounting such a solar cell module 1 on a roof or the like, a pedestal (not shown) is installed on the roof or the like, and the solar cell module 1 shown in FIGS. The light receiving surface of the battery panel 2 is directed upward, and the frame 3 is placed on the gantry in this state. And the bracket | metal | money etc. are hooked on the latching | locking part 21c of each frame member 21 of the frame 3, and the solar cell module 1 is fixed to a mount.

  By the way, in such a solar cell module 1, as shown in FIG. 4, the back surface protection layer 17 of the solar cell panel 2 has a three-layer structure and includes a metal Al layer. Laminated on the side. For this reason, the Al layer of the back surface protective layer 17 is disposed close to the aluminum frame member 21, and there is a possibility that electric discharge occurs between the Al layer of the back surface protective layer 17 and the frame member 21.

  However, as shown in FIG. 4, the space between the edge portion of the solar cell panel 2 and the groove portion 22 of the frame member 21 is filled with the hot melt adhesive 31, and an insulating layer made of the hot melt adhesive 31 is formed therebetween. ing. This insulating layer has a thickness of about 2 mm and sufficiently enhances the insulation between the edge of the solar cell panel 2 and the groove 22 of the frame member 21. For this reason, no discharge occurs between the Al layer of the back surface protective layer 17 and the groove 22 of the frame member 21.

  Further, the hot melt adhesive 31 is not only interposed between the edge portion of the solar cell panel 2 and the groove portion 22 of the frame member 21, but also overflows to the side wall surface 21 i beyond the edge of the inner wall 21 b of the groove 22. Has been. For this reason, an insulating layer is also interposed between the Al layer of the back surface protective layer 17 and the side wall surface 21i of the frame member 21, and the insulation between them is improved, and it is difficult for discharge to occur between the Al layer and the side wall surface 21i. .

  Furthermore, the hot melt adhesive 31 overflows and is applied to the side wall surface 21 i, thereby increasing the creepage distance of the insulating layer made of the hot melt adhesive 31, and between the edge of the solar cell panel 2 and the frame member 21. The insulation is improved.

  The width of the hot melt adhesive 31 on the side wall surface 21i, that is, the distance from the edge of the inner wall 21b to the end of the hot melt adhesive 31 is set to about 3 mm to 5 mm. The width of the hot melt adhesive 31 does not cause discharge between the Al layer and the side wall surface 21 i of the frame member 21 even when a voltage of 8 kV is applied between the Al layer of the back surface protective layer 17 and the frame member 21 by impulse. It was set by experiment to satisfy the condition.

  On the other hand, conventionally, as shown in FIG. 10, discharge may occur between the Al layer of the back surface protective layer 104 and the frame member 106 at the place P where the sealing material 107 does not exist.

  Thus, in the solar cell module of the present embodiment, the hot melt adhesive 31 is not only interposed between the edge portion of the solar cell panel 2 and the groove portion 22 of the frame member 21, but the hot melt adhesive 31 is formed in the groove 22. Since it is applied to the side wall surface 21i beyond the edge of the inner wall 21b, the discharge between the Al layer of the back surface protective layer 17 and the frame member 21 is extremely difficult to occur.

  Moreover, since it is not necessary to use a sealing material and an adhesive together as in the prior art, and only a hot melt adhesive is used, man-hours and costs can be reduced.

  That is, although only the hot melt adhesive is used, the edge of the solar cell panel 2 can be fixed and sealed, the insulation can be improved, and the man-hours and costs can be reduced. Can do.

  Furthermore, since the solid state of the hot melt adhesive 31 is maintained at room temperature, storage, transportation, delivery, etc. of the solar cell panel frame formed by applying the hot melt adhesive 31 to the frame member 21 are possible.

  Next, an embodiment of a method for manufacturing a solar cell panel frame and a solar cell module according to the present invention will be described.

  6A to 6C show the manufacturing method of the present embodiment. In this manufacturing method, a hot melt gun 32 shown in FIG. The hot melt gun 32 contains a hot melt adhesive, heats and liquefies the hot melt adhesive, and discharges a predetermined amount of hot melt adhesive per unit time from the discharge nozzle 33. The hot melt gun 32 is slid linearly at a constant speed in the horizontal direction while maintaining the discharge nozzle 33 at a constant height.

  As shown in FIG. 6A, the frame member 21 is positioned below the discharge nozzle 33 of the hot melt gun 32 while being held horizontally and parallel to the sliding direction of the hot melt gun 32. Further, with the groove 22 of the frame member 21 facing upward, a part of the hot melt adhesive 31 discharged from the discharge nozzle 33 of the hot melt gun 32 is between the inner wall 21b and the side wall surface 21i of the groove 22 of the frame member 21. The frame member 21 is positioned so as to cover the corner portion 21m.

  In this state, the hot melt adhesive in the hot melt gun 32 is heated and melted to be liquefied, and a constant amount of hot melt adhesive per unit time is discharged downward from the discharge nozzle 33 of the hot melt gun 32 while hot melt is discharged. When the gun 32 is slid in the horizontal direction at a constant speed and the discharge nozzle 33 of the hot melt gun 32 is moved along the corner portion 21m of the frame member 21, the hot melt adhesive 31 is shown in FIG. Is dripped down into the corner portion 21m, poured into the middle of the depth of the groove 22, and applied over the edge of the lower inner wall 21b to the side wall surface 21i.

  Thus, after applying the hot melt adhesive 31 to the frame member 21, the hot melt adhesive 31 is cooled and solidified. Thereby, the frame for solar cell panels formed by applying the hot melt adhesive 31 to the frame member 21 is completed. Since the hot-melt adhesive 31 is solidified, this solar cell panel frame can be stored, transported, delivered, etc., and the solar cell frame itself can be traded as a product.

  Next, the frame member 21 is heated, and the hot melt adhesive 31 of the frame member 21 is liquefied to such an extent that the viscosity does not decrease too much. Heat to a similar temperature. In this state, the edge portion of the solar cell panel 2 is inserted into the groove 22 of the frame member 21 as shown in FIG. At this time, the hot melt adhesive 31 in the groove 22 is pushed away by the edge portion of the solar cell panel 2 and flows. However, since the inner wall 21h of the groove 22 is raised, the hot melt adhesive 31 is formed on the inner wall 21h. The light receiving surface of the solar cell panel 2 does not overflow beyond the edge, and the light receiving surface of the solar cell panel 2 is not contaminated by the hot melt adhesive 31.

  Thus, the frame member 21 is attached to the four edge portions of the solar cell panel 2. And as shown in FIG. 5, the edge part of the two frame members 21 is mutually connected for every corner | angular part of the solar cell panel 2, and the corner | angular part of the solar cell panel 2 is protected by two frame members.

  Thereafter, as shown in FIG. 1, the beam 4 is bridged and fixed between a pair of opposing frame members 21 on the back surface side of the solar cell panel 2. Thereby, the solar cell module 1 is completed.

  In the above embodiment, the inner wall 21b of the groove 22 is lower than the inner wall 21h. However, the inner walls 21b and 21h on both sides of the groove 22 may be set to the same height as shown in FIG. In this case, when the amount of the hot melt adhesive 31 poured into the groove 22 is reduced and the edge portion of the solar cell panel 2 is inserted into the groove 22 of the frame member 21, the hot melt adhesive 31 is The light receiving surface of the solar cell panel 2 is prevented from overflowing beyond the edge of 21h.

  Moreover, as shown in FIG. 8, you may form the corner | angular part 21m between the inner wall 21b of the groove | channel 22 of the frame member 21, and the side wall surface 21i in the acute angle which faces upwards. In this case, when the hot melt adhesive 31 drips down to the corner portion 21m, the hot melt adhesive 31 is easily divided into two flows by the corner tip forming an acute angle of the corner portion 21m. The adhesive 31 overflows from the edge of one inner wall 21b on the back surface side of the solar cell panel 2 in the groove 22 to the side wall surface 21i, and the hot-melt adhesive 31 of the other flow flows into the groove 22 and the solar cell panel in the groove 22 2 Damped by the other inner wall 21h on the light receiving surface side. Such a configuration is particularly effective when the hot melt adhesive 31 has a high viscosity.

  Furthermore, as shown in FIG. 9, it is good also as a gentle bending surface which chamfered the corner part 21m, or a bending surface where a cross section draws a circular arc. In this case, the hot melt adhesive 31 is hardly divided at the corner portion 21m, and an insulating layer made of the hot melt adhesive 31 can be stably formed. Such a configuration is particularly effective when the viscosity of the hot melt adhesive 31 is low.

  Moreover, although the hot melt adhesive is illustrated as the adhesive, an insulating adhesive such as volatile, two-component mixed type, and thermosetting may be applied. Even if it is an adhesive that cannot be heated and melted, the present invention can be applied by applying the adhesive to the groove of the frame member and inserting the edge of the solar cell panel into the groove of the frame member before the adhesive is cured. Can be implemented.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. It is understood.

DESCRIPTION OF SYMBOLS 1 Solar cell module 2 Solar cell panel 3 Frame 4 Beam 11 Translucent insulating substrate 12 Transparent electrode film 13 Photoelectric conversion layer 14 Back surface electrode film 15 Solar cell 16 Sealing film 17 Back surface protection layer 21 Frame member 22 Groove 31 Hot Melt adhesive 32 Photomelt gun 33 Discharge nozzle

Claims (12)

A solar battery panel having a laminated structure including at least a solar battery cell and a back surface protection sheet; and a frame member that supports a peripheral portion of the solar battery panel; and a groove formed on a side wall of the frame member, In the solar cell module supported by inserting the edge portion,
One of the inner walls on both sides of the groove sandwiching the edge of the solar cell panel is on the back side of the solar cell panel, and the other is on the light receiving surface side of the solar cell panel,
An insulating adhesive is interposed between the edge of the solar cell panel and the groove of the frame member, and the edge of the solar cell panel is sealed by this adhesive, and this adhesive is used for the solar cell in the groove. A solar cell module, which is applied so as to overflow from one inner wall edge on the back side of the panel to the side wall surface of the frame member.   The inner wall on the back surface side of the solar cell panel in the groove is lower in the depth direction of the groove than the other inner wall on the light-receiving surface side of the solar cell panel in the groove. The solar cell module described.   The solar cell module according to claim 1, wherein the adhesive is a hot melt adhesive. A frame member that supports a peripheral edge portion of a solar battery panel having a laminated structure including at least a solar battery cell and a back surface protection sheet is provided, and the peripheral edge portion of the solar battery panel is inserted and supported on the side wall of the frame member. In the frame for solar cell panel in which the groove is formed,
One of the inner walls on both sides of the groove sandwiching the edge of the solar cell panel is on the back side of the solar cell panel, and the other is on the light receiving surface side of the solar cell panel,
An adhesive having an insulating property is poured into the groove, dammed by the other inner wall on the solar cell panel light-receiving surface side in the groove, and from one inner wall edge on the back surface side of the solar cell panel in the groove A solar cell panel frame, which is applied so as to overflow into a side wall surface of the frame member.   5. The inner wall on the back surface side of the solar cell panel in the groove is made lower in the depth direction of the groove than the other inner wall on the light-receiving surface side of the solar cell panel in the groove. The frame for solar cell panels described.   The frame for a solar cell panel according to claim 4 or 5, wherein an angle forming an acute angle is formed at a corner portion between one inner wall on the back side of the solar cell panel in the groove and the side wall of the frame member. .   The frame for a solar cell panel according to claim 4 or 5, wherein a corner portion between one inner wall on the back surface side of the solar cell panel in the groove and the side wall of the frame member is formed with a gently curved surface. .   The solar cell panel frame according to any one of claims 4 to 7, wherein the adhesive is a hot melt adhesive. A solar battery panel having a laminated structure including at least a solar battery cell and a back surface protection sheet; and a frame member that supports a peripheral portion of the solar battery panel; and a groove formed on a side wall of the frame member. In the method of manufacturing a solar cell module that is supported by inserting the edge portion,
One of the inner walls on both sides of the groove sandwiching the edge of the solar cell panel is on the back side of the solar cell panel, and the other is on the light receiving surface side of the solar cell panel,
The insulating adhesive is dripped down into the corner between the inner wall on the back side of the solar cell panel in the groove and the side wall of the frame member, and poured into the groove, and the solar cell panel in the groove It is dammed by the other inner wall on the light receiving surface side, and is applied so as to overflow from one inner wall edge on the back side of the solar cell panel in the groove to the side wall surface of the frame member,
The edge of the solar cell panel is inserted into the groove of the frame member, the edge of the solar cell panel is sandwiched between the inner walls on both sides of the groove, and the edge of the solar cell panel is sealed with an adhesive. A method for manufacturing a solar cell module, wherein the solar cell module is fixed.   The method for manufacturing a solar cell module according to claim 9, wherein the adhesive is a hot melt adhesive. A frame member that supports a peripheral edge portion of a solar battery panel having a laminated structure including at least a solar battery cell and a back surface protection sheet is provided, and the peripheral edge portion of the solar battery panel is inserted and supported on the side wall of the frame member. In the manufacturing method of the frame for solar cell panels in which the grooves are formed,
One of the inner walls on both sides of the groove sandwiching the edge of the solar cell panel is on the back side of the solar cell panel, and the other is on the light receiving surface side of the solar cell panel,
The insulating adhesive is dripped into the corner between the inner wall on the back surface side of the solar cell panel in the groove and the side wall of the frame member, and poured into the groove, and the solar cell panel in the groove A solar cell characterized in that it is dammed by the other inner wall on the light receiving surface side and applied so as to overflow from one inner wall edge on the back surface side of the solar cell panel in the groove to the side wall surface of the frame member. A method for manufacturing a panel frame.   The method for manufacturing a solar cell panel frame according to claim 11, wherein the adhesive is a hot-melt adhesive.

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