JP6260765B2 - Solar cell module - Google Patents

Description

  The present invention relates to a solar cell module to which a frame is attached.

  In the solar cell panel, the solar cell is sealed with a sealing resin between glass and a back sheet. A frame is attached to the outer periphery of the solar cell panel (see, for example, Patent Document 1).

JP 2011-114257 A

  It is desirable that the solar cell module has a stronger frame structure in order to withstand environmental loads such as snow load and wind pressure.

  This invention is made | formed in view of such a condition, The objective is to provide the solar cell module which improved reliability.

  In order to solve the above problems, a solar cell module according to an aspect of the present invention includes a solar cell panel in which a solar cell is sealed between a light-receiving surface protection member and a back surface protection member, and an outer edge of the solar cell panel. And a reinforcing member extending in the first direction and having both ends fixed to the frame. The frame is provided on the light receiving surface side of the main body portion, the fitting portion into which the outer edge of the solar cell panel is fitted, and the first direction from the main body portion, and the first is larger than the width in the first direction. And a mounting portion provided with a long hole having a wide width in the second direction intersecting the direction. The reinforcing member is provided at a position between the back surface protection member and the attachment portion, and is fixed to the attachment portion through a long hole.

  Yet another embodiment of the present invention is a method for manufacturing a solar cell module. The manufacturing method includes a solar cell panel in which a solar cell is sealed between a light-receiving surface protection member and a back surface protection member, and a frame provided on an outer edge of the solar cell panel, the main body portion, and light reception of the main body portion A fitting portion that is provided on the surface side and is fitted in the first direction from the main body portion with a fitting portion into which the outer edge of the solar cell panel is fitted, and a width in the second direction that intersects the first direction is wider than a width in the first direction. And a reinforcing member that extends in the first direction and is fixed at both ends to the frame, and attaches the reinforcing member to the back surface protection member of the solar cell panel. After the frame is attached to the outer edge of the solar cell panel to which the reinforcing member is bonded, the reinforcing member is fixed to the attaching portion through the long hole.

  ADVANTAGE OF THE INVENTION According to this invention, the solar cell module which improved reliability can be provided.

It is a top view which shows the solar cell module in this embodiment. It is a figure which shows the connection member which connects between frames. It is sectional drawing which shows the structure of a solar cell module. It is sectional drawing which shows the structure of a solar cell module. 6 is a cross-sectional view showing a structure of a solar cell module in Comparative Example 1. FIG. 10 is a cross-sectional view showing the structure of a solar cell module in Comparative Example 2. FIG. 10 is a cross-sectional view showing a structure of a solar cell module in Modification 1. FIG. 12 is a cross-sectional view showing a structure of a solar cell module in Modification 2. FIG.

  Before describing the present invention in detail, an outline will be described. In the solar cell module according to the embodiment of the present invention, a frame is attached to the outer edge of the solar cell panel in which the solar cell is sealed between the light-receiving surface protection member and the back surface protection member. A reinforcing member extending along the back surface protection member is bonded to the solar cell panel, and both ends of the reinforcing member are fixed to the frame. The frame is provided with an attaching portion for fixing the reinforcing member, and the reinforcing member is screwed to the frame through a long hole provided in the attaching portion. In this embodiment, since the solar cell panel is bonded to the reinforcing member, not only a positive pressure load due to snow on the solar cell panel, but also a structure that is strong against a negative pressure load when strong wind blows. can do. Moreover, in this embodiment, since a flame | frame and a reinforcement member are screwed through a long hole, even if the fixing position of a reinforcement member slip | deviates, a solar cell module can be assembled easily.

  FIG. 1 is a plan view showing a solar cell module 100 in the present embodiment. The solar cell module 100 includes a solar cell panel 20, a frame frame 38, a reinforcing member 60, a fixing member 70, and an adhesive member. The solar cell panel 20 has a rectangular shape, and includes a first frame 40a, a second frame 40b, a third frame 40c, and a fourth frame 40d (hereinafter collectively referred to as a frame 40) constituting a frame frame 38 that surrounds four sides. (Also called).

  The frame 40 is formed of a metal material such as aluminum, iron, stainless steel, or a resin material, and is formed by extrusion molding or the like. The frame 40 includes a main body 42 having a substantially rectangular cross section. The main body 42 has a hollow structure for weight reduction.

  The reinforcing member 60 is fixed to the first frame 40 a and the second frame 40 b extending in the longitudinal direction (y direction) of the solar cell panel 20 in the frame 40. The first frame 40 a and the second frame 40 b are provided with an attachment portion 46 for fixing the reinforcing member 60. The attachment portion 46 extends in the short direction (x direction) from the main body portion 42. The attachment portion 46 is provided with a long hole 47 that is wide in the y direction. The attachment portion 46 fixes the reinforcing member 60 via a fixing member 70 inserted into the long hole 47.

  End portions 41 a, 41 b, 41 c, 41 d (hereinafter also collectively referred to as end portions 41) of each frame 40 are cut obliquely with respect to the direction in which the frame 40 extends. The corner portions 39 of the frame 38 are formed by contact between the end portions 41 that are cut obliquely. The frames 40 are connected by a connecting member inserted into the end portion 41.

  FIG. 2 is a view showing a connecting member 55 that connects the frames 40 together. The connecting member 55 is an L-shaped member, and is formed of a metal material such as aluminum or a resin material. The connecting member 55 has a hook-shaped portion 56. The connecting member 55 is fixed to the frame 40 by press-fitting the hook-like portion 56 into the main body portion 42 having a hollow structure.

  3 and 4 are cross-sectional views showing the structure of the solar cell module 100. FIG. 3 shows a cross section taken along line AA in FIG. 1, and FIG. 4 shows a cross section taken along line BB in FIG.

  The solar cell panel 20 includes a light receiving surface protection member 10, a sealing member 12, a solar cell 14, and a back surface protection member 16. The light receiving surface protection member 10 is disposed on the light receiving surface side in the solar cell panel 20 and protects the surface of the solar cell panel 20. As the light-receiving surface protection member 10, glass having translucency and water shielding properties, translucent plastic, or the like is used. 3 and 4, the light receiving surface side corresponds to the upper side, that is, the back side, and the back surface side corresponds to the lower side, that is, the near side.

  The sealing member 12 is provided between the light-receiving surface protection member 10 and the back surface protection member 16, and seals the solar cell 14 provided therebetween. As the sealing member 12, for example, a resin film such as EVA (ethylene vinyl acetate copolymer), PVB (polyvinyl butyral), or polyimide is used. The resin film has a sheet shape.

  The solar cell 14 has a light receiving surface and a back surface, and is a photovoltaic element that generates power mainly by light incident on the light receiving surface. The solar cell panel 20 includes a plurality of solar cells 14, and the plurality of solar cells 14 are electrically connected by a wiring material such as copper foil or aluminum foil.

  The back surface protection member 16 is disposed on the back surface side of the solar cell panel 20 and protects the back surface of the solar cell panel 20. As the back surface protection member 16, a resin film such as polyethylene terephthalate (PET), a laminated film having a structure in which an aluminum foil is sandwiched between resin films, and the like are used. The reinforcing member 60 is bonded to the back surface protection member 16 via the bonding member 80.

  The frame 40 includes a main body part 42, a fitting part 44, an attachment part 46, and a step part 48. 3 shows the first frame 40a shown in FIG. 1 as the frame 40, the second frame 40b has a similar structure. The third frame 40c and the fourth frame 40d have the same structure as that of the first frame 40a. However, the third frame 40c and the fourth frame 40d need only have the main body portion 42 and the fitting portion 44 and do not have the attachment portion 46. Also good.

  The main body 42 has a rectangular cross-sectional shape and is provided with a hollow portion 42e. The main body 42 has an upper surface 42a, a lower surface 42b, an inner side surface 42c, and an outer side surface 42d. On the light receiving surface side of the frame 40, a fitting portion 44 formed by an upper surface 42a of the main body 42 and an L-shaped member formed on the light receiving surface side of the upper surface 42a is provided. Therefore, the fitting part 44 has a U-shape and the outer edge of the solar cell panel 20 is inserted. Thereby, the fitting part 44 holds the solar cell panel 20. Note that a silicone resin or the like may be interposed between the fitting portion 44 and the solar cell panel 20 for adhesion.

  A mounting portion 46 is provided on the inner side surface 42c. The attachment portion 46 is provided between the upper surface 42a and a position corresponding to the height equal to the height (z direction) of the reinforcing member 60, or about 0.5 mm to 3 mm. The attachment portion 46 supports the reinforcement member 60 because the reinforcement member 60 and the attachment portion 46 are provided in this order from the light receiving surface side. Further, the attachment portion 46 fixes the reinforcing member 60 with a fixing member 70 such as a screw inserted into the long hole 47. As shown in FIG. 4, the long hole 47 has a length in the x direction substantially equal to a thickness of the shaft portion of the fixing member 70 such as a screw, and a length in the y direction is wider than a length in the x direction. The width W is assumed. As a result, even if the reinforcing member 60 is displaced in the y direction, the position of the fixing member 70 can be adjusted.

  The attachment portion 46 is provided such that a step portion 48 is formed between the attachment portion 46 and the lower surface 42b. In other words, in addition to the thickness of the attachment portion 46, the main body portion 42 has a length approximately equal to the height of the reinforcing member 60 on the light receiving surface side of the attachment portion 46, and a step portion on the back side of the attachment portion 46. 48 has a length to be formed. For this reason, the mounting portion 46 and the lower surface 42b have different structures. The height of the stepped portion 48 is set to be higher than the height of the head portion 70 b of the fixing member 70 protruding from the mounting portion 46. Thereby, when attaching the solar cell module 100 to a structure, even if it is a case where the lower surface 42b of the frame 40 is made to contact the attachment surface etc. of a structure, it can prevent that the fixing member 70 interferes with an attachment surface. .

  The reinforcing member 60 is a member having an H-shaped cross section, and is formed of a metal material such as aluminum, iron, stainless steel, or a resin material. The reinforcing member 60 includes flanges 61 and 62 and a web 63. The first flange 61 is provided to face the back surface protection member 16 of the solar cell panel 20. The first flange 61 has a bonding surface 61 a that is a flat surface, and is bonded to the back surface protection member 16 by the bonding member 80. The second flange 62 is provided to face the attachment portion 46 and has an attachment hole 64 for attaching the fixing member 70. The mounting hole 64 is threaded for screwing the fixing member 70. The web 63 is a member that connects between the first flange 61 and the second flange 62 facing each other.

  The fixing member 70 passes through the long hole 47 of the attachment portion 46 and the attachment hole 64 of the second flange 62 to fix the frame 40 and the reinforcing member 60. The fixing member 70 is a screw whose mounting surface 70a with the mounting portion 46 such as a round pan screw, a bind screw or a truss screw is a surface perpendicular to the z direction. Since the fixing member 70 is inserted into the long hole 47, a screw with a large diameter of the head 70b is desirable. For example, a truss screw may be used. The screw used as the fixing member 70 includes a bolt, and the bolt and the nut may be combined and fixed. The fixing member 70 may be other than a screw as long as it has a head portion and a shaft portion such as a rivet.

The bonding member 80 is provided between the solar cell panel 20 and the reinforcing member 60 and bonds the back surface protection member 16 and the bonding surface 61 a of the first flange 61. The adhesive member 80 is a member having a cushioning property having a certain thickness, and an electrically insulating member.
As such an adhesive member 80, for example, a double-sided tape having a flexible foam base material may be used. By using a cushioning material as the adhesive member 80, the force applied between the solar cell panel 20 and the reinforcing member 60 can be reduced. Further, by using an electrically insulating member as the adhesive member 80, it is possible to prevent the electric power generated by the solar cell panel 20 from leaking to the reinforcing member 60 and the frame frame 38.

  Next, referring to FIG. 5 and FIG. 6, effects of the solar cell module 100 in the present embodiment will be described. First, the solar cell module in Comparative Example 1 shown in FIG. 5 and the solar cell module in Comparative Example 2 shown in FIG. 6 will be described.

  FIG. 5 is a cross-sectional view showing the structure of the solar cell module 200 in the first comparative example. The solar cell module 200 includes the solar cell panel 20, a frame 140 that constitutes a frame frame 138, a reinforcing member 160, and a fixing member 70. The first comparative example is different from the above-described embodiment in that the position of the attachment portion 146 extending from the main body portion 142 of the frame 140 is on the second flange 162. In Comparative Example 1, the web 163 is provided with a notch 163a so that the attachment portion 146 and the reinforcing member 160 do not interfere with each other.

  In Comparative Example 1, the reinforcing member 160 is not provided at a position between the solar cell panel 20 and the attachment portion 146, and the second flange 162 is provided below the attachment portion 146 (−z direction side). Yes. For this reason, when a downward load (−z direction) is applied to the solar cell panel 20, the reinforcing member 160 cannot be supported by the fixing member 70 and may come off. In addition, it is necessary to prevent the reinforcing member 160 and the mounting portion 146 from interfering with each other by providing a cutout portion 163a in the web 163 of the H-shaped reinforcing member 160, which is a labor for manufacturing.

  FIG. 6 is a cross-sectional view showing the structure of the solar cell module 300 in Comparative Example 2. The solar cell module 300 includes the solar cell panel 20, a frame 240 constituting a frame frame 238, a reinforcing member 60, and a fixing member 170. In Comparative Example 2, there is no difference in height between the attachment portion 246 and the lower surface 242b of the main body portion 242, so as to prevent interference due to the fixing member 170 protruding downward (−z direction). The difference from the above embodiment is that a flat head screw is used as the fixing member 170.

  In Comparative Example 2, in order to fix the reinforcing member 60 and the attachment portion 246 with a countersunk screw, it is necessary to provide a conical screw hole 247 to store the head of the countersunk screw. If it does so, the thickness of the attaching part 246 in the position of the screw hole 247 will become thin, and there existed a possibility that intensity | strength might fall.

  On the other hand, in solar cell module 100 in the present embodiment, reinforcing member 60 is provided at a position between solar cell panel 20 and attachment portion 46. Therefore, even if a downward load (−z direction) is applied to the solar cell panel 20, the reinforcing member 60 can be supported not only by the fixing member 70 but also by the attachment portion 46. Thereby, the intensity | strength of the solar cell module 100 can be raised. Moreover, since the notch part is not provided in the reinforcement member 60, the strength reduction of the solar cell module 100 by providing a notch part can be prevented.

  In the solar cell module 100, the solar cell panel 20 and the reinforcing member 60 are bonded by the bonding member 80. Thereby, even if a strong wind blows on the solar cell panel 20 and the air pressure above the light-receiving surface protection member 10 is lowered and an upward force (+ z direction) is applied, the solar cell panel 20 is removed from the frame 38. It is possible to prevent floating and bending. Therefore, by providing the adhesive member 80, damage due to bending of the solar cell panel 20 can be prevented, and the reliability of the solar cell module 100 can be improved.

  In the solar cell module 100, the solar cell panel 20 and the reinforcing member 60 are bonded by an adhesive member 80 having cushioning properties. Further, the solar cell panel 20 is bonded to the bonding surface 61a which is a flat surface in the reinforcing member 60. Thereby, it can prevent that the back surface protection member 16 of the solar cell panel 20 will be damaged by the reinforcement member 60. FIG. Furthermore, by using the insulating adhesive member 80, it is possible to prevent leakage from the solar cell panel 20 to the reinforcing member 60. Thereby, the reliability of the solar cell module 100 can be improved.

  Moreover, since the long hole 47 is provided in the attachment part 46, the solar cell module 100 can attach the fixing member 70 easily even if the fixing position of the reinforcement member 60 shifts | deviates to ay direction. In particular, when the reinforcing member 60 is bonded, the fixing member 70 can be easily attached even if the bonding position is shifted. Specifically, when assembling the solar cell module 100, the reinforcing member 60 is bonded to the solar cell panel 20, and then the frame 40 is attached and the reinforcing member 60 and the frame 40 are fixed by the fixing member 70. At this time, if the elongated hole 47 is not provided in the attachment portion 46, the attachment hole 64 of the reinforcement member 60 and the hole of the attachment portion 46 may be displaced depending on the position where the reinforcement member 60 is bonded, and cannot be screwed. there were. On the other hand, in the present embodiment, even if the bonding position of the reinforcing member 60 is deviated to some extent, since the elongated hole 47 is provided in the mounting portion 46, the fixing member 70 can be displaced and screwed. it can. Thereby, the effort required for the assembly of the solar cell module 100 can be reduced.

  In the solar cell module 100, a stepped portion 48 that is higher than the height of the head portion 70 b of the fixing member 70 is provided between the attachment portion 46 and the lower surface 42 b of the main body portion 42. For this reason, without using a flat head screw as the fixing member 70, it is possible to prevent interference due to the protrusion of the fixing member 70. Further, since it is not necessary to provide a countersunk screw hole, it is possible to prevent a decrease in strength due to a reduction in the thickness of the mounting portion 46. Furthermore, in the case of providing a countersunk screw hole, it is necessary to form a conical inclined surface. However, in the case of a truss screw hole, it is only necessary to open a simple through hole. Therefore, compared with the case where the hole for countersunk screws is opened, the labor of processing can be reduced.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to each of those constituent elements or combinations of processing processes, and such modifications are also within the scope of the present invention. .

  In the above-described embodiment, the reinforcing member 60 has an H-shaped cross-sectional shape. However, in a modified example, the prismatic member having a rectangular cross-sectional shape, a channel-shaped member having a C-shaped cross-sectional shape, and other shapes. It is good also as what has the same shape as steel. FIG. 7 is a cross-sectional view showing the structure of the solar cell module 100 in the first modification, and shows a case where a hollow member having a hollow rectangular cross section is used as the reinforcing member 60. FIG. 8 is a cross-sectional view showing the structure of the solar cell module 100 according to the second modification, and shows a case where a lip groove member having a C-shaped cross section is used as the reinforcing member 60. Even when such a reinforcing member 60 is used, the same effect as that of the above-described embodiment can be obtained.

  In the second modification shown in FIG. 8, it is desirable to arrange the reinforcing member 60 so that the C-shaped bottom surface 60 a faces the back surface protection member 16. By using the bottom surface 60a, which is a flat surface having a large area, as an adhesive surface to the back surface protection member 16, the solar cell panel 20 and the reinforcing member 60 can be more firmly bonded. Moreover, the force added to the solar cell panel 20 by the reinforcing member 60 can also be disperse | distributed by making the bottom face 60a which is a flat surface with a large area into an adhesive surface with the back surface protection member 16. FIG.

  DESCRIPTION OF SYMBOLS 10 ... Light-receiving surface protection member, 14 ... Solar cell, 16 ... Back surface protection member, 20 ... Solar cell panel, 38 ... Frame, 40 ... Frame, 42 ... Main-body part, 42a ... Upper surface, 42b ... Lower surface, 42c ... Inner surface, 44 ... fitting part, 46 ... attachment part, 47 ... long hole, 48 ... step part, 60 ... reinforcing member, 100, 200, 300 ... solar cell module.

Claims (3)

A solar cell panel in which a solar cell is sealed between the light-receiving surface protection member and the back surface protection member;
A frame provided on an outer edge of the solar cell panel;
A reinforcing member extending in a first direction and having both ends fixed to the frame,
The frame is
A main body having an upper surface, a lower surface, an inner surface and an outer surface, and having a rectangular cross section perpendicular to the longitudinal direction of the frame;
A fitting portion that is provided on the upper surface of the main body and into which an outer edge of the solar cell panel is fitted;
Projecting from the inner surface of the main body portion toward the center of the solar cell panel in the first direction, and forming a stepped portion between the lower surface of the main body portion and the upper surface side. A mounting portion provided at a shifted position,
The reinforcing member is provided at a position between the back surface protection member and the attachment portion, and is fixed to the attachment portion via an attachment hole penetrating in the thickness direction of the attachment portion.
The reinforcing member includes a first flange facing the back surface protection member, a second flange facing the mounting portion, and a web connecting the first flange and the second flange, and the mounting portion. wherein the thickness direction first flange and the second flange the attachment hole and heavy Do that solar cell module. 2. The solar cell module according to claim 1 , wherein the reinforcing member is an end surface of the first flange, the second flange, and the web, and an end surface facing the inner surface of the main body portion of the frame is aligned. . 3. The solar cell module according to claim 1, wherein the attachment hole has a width in a second direction intersecting the first direction larger than a width in the first direction.

Images