JP2016063682A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module capable of draining rainwater that gathers on a surface of the solar cell module, while preventing manufacture cost of a frame from being increased.SOLUTION: The solar cell module includes the frames that surround a solar cell panel. The frames include a first frame 40 and a second frame 50 which are connected while neighboring to each other. The first frame 40 includes a first sidewall 43 and a first upper flange 41 that extends from the first sidewall 43 to a light receiving plane side of the solar cell panel. The second frame 50 includes a second sidewall 53 and a second upper flange 51 extending from the second sidewall 53 to the light receiving plane side of the solar cell panel. In a length direction of the first frame 40, the first sidewall 43 and the first upper flange 41 have an equal length. In a length direction of the second frame 50, an end portion of the second upper flange 51 is positioned inside in a length direction from an end portion of the second sidewall 53 just for a result of adding a predetermined length M to a width of the first upper flange 41.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a solar cell module.

  A solar cell module generally includes a solar cell panel in which a solar cell element and a surface protection material (such as a cover glass) are laminated, and a frame material called a frame (such as a metal frame) that surrounds the peripheral edge of the solar cell panel. Consists of.

  The frame includes an upper flange that supports the light receiving surface of the solar cell panel, and a back flange that supports the back surface of the solar cell panel. The upper flange and the back flange extend in the horizontal direction (inward direction of the solar cell module) from the side wall portion of the frame, and the upper flange and the back flange form a fitting groove into which the solar cell panel is fitted. .

  The solar cell panel is fitted into a fitting groove formed by the upper flange and the back flange, thereby forming a solar cell module. When the solar cell panel is fitted in the fitting groove, the upper flange of the frame is positioned on the surface of the solar cell panel. A step between the surface and the frame surface) occurs.

  Here, since the solar cell module is installed outdoors, rainwater accumulates on the surface of the solar cell module due to the above-described step. When this accumulated rainwater dries, dirt remains at the location where the rainwater has accumulated, and the remaining dirt may impede sunlight incident on the solar cell module, thereby reducing the power generation efficiency of the solar cell module.

  In order to solve this problem, it has been proposed to provide a drainage groove for draining accumulated rainwater in the upper flange of the frame (see, for example, Patent Document 1).

JP 2011-114257 A

  However, the structure in which the groove is provided in the upper flange of the frame as described above requires a process of providing the groove in the upper flange, and there is a problem that the manufacturing cost of the frame increases as the number of processing steps increases.

  This invention is made | formed in view of said point, and makes it a subject to provide the solar cell module which can drain the rainwater which accumulates on the solar cell module surface, suppressing the raise of the manufacturing cost of a flame | frame.

  The solar cell module is a solar cell module comprising a solar cell panel and a frame surrounding the solar cell panel, wherein the frame is a first frame and a second frame connected adjacent to each other. The first frame includes a first side wall portion that protects a side surface of the solar cell panel, and a first upper flange that extends from the first side wall portion and supports the light receiving surface of the solar cell panel. The second frame includes a second side wall portion that protects a side surface of the solar cell panel, and a second upper flange that extends from the second side wall portion and supports the light receiving surface of the solar cell panel. In the longitudinal direction of the first frame, the first side wall portion and the first upper flange have the same length, and in the longitudinal direction of the second frame, the end portion of the second upper flange is the second side. Longitudinally from the end parts, the amount obtained by adding a predetermined length to the width of the first upper flange may be a requirement that is located inside.

  According to the disclosed technology, it is possible to provide a solar cell module capable of draining rainwater collected on the surface of the solar cell module while suppressing an increase in the manufacturing cost of the frame.

It is a top view which illustrates the solar cell module which concerns on 1st Embodiment. It is a partial expanded sectional view which follows the AA line of FIG. It is a partial expansion perspective view which illustrates the short side frame of the solar cell module concerning a 1st embodiment. It is a partial expansion perspective view which illustrates the long side frame of the solar cell module which concerns on 1st Embodiment. FIG. 2 is a partially enlarged plan view of a portion B in FIG. 1. It is a partial expansion perspective view of the B section of FIG. It is a partial expansion perspective view which illustrates the long side frame of the solar cell module which concerns on 2nd Embodiment. It is a partial expansion perspective view which illustrates the connection part of the short side frame and long side frame of the solar cell module which concerns on 2nd Embodiment. It is the elements on larger scale of the G section of FIG.

  Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and the overlapping description may be abbreviate | omitted.

<First Embodiment>
FIG. 1 is a plan view illustrating the solar cell module according to the first embodiment. FIG. 2 is a partially enlarged cross-sectional view taken along line AA in FIG. FIG. 3 is a partially enlarged perspective view illustrating the short side frame of the solar cell module according to the first embodiment. FIG. 4 is a partially enlarged perspective view illustrating the long side frame of the solar cell module according to the first embodiment.

  1 to 4, the solar cell module 10 includes a solar cell panel 20 and a frame 30.

  For example, the solar cell panel 20 is provided with a sealing material made of EVA (Ethylene-vinyl acetate) or the like so as to cover the periphery of the substrate on which the solar cell element is formed, and the surface side of the sealing material (solar cell element side) The protective member which consists of a white board tempered glass board etc. is arrange | positioned. A protective sheet made of aluminum foil, polyethylene terephthalate resin, or the like may be provided on the back side of the sealing material (the side opposite to the protective member).

  The planar shape of the solar cell panel 20 can be a rectangular shape, for example. Although the planar shape of the solar cell panel 20 is not limited to a rectangular shape, hereinafter, the case where the planar shape of the solar cell panel 20 is a rectangular shape will be described as an example. In addition, a planar shape shall point out the shape when a target object is seen from the normal line direction of the light-receiving surface of the solar cell panel 20. FIG.

  The frame 30 is attached in a frame shape so as to surround the periphery of the end portion of the solar cell panel 20. The frame 30 is a member that improves the strength of the solar cell module 10 and covers the light receiving surface, the side surface, and the back surface of the end portion of the solar cell panel 20 to protect the end portion of the solar cell panel 20.

  The frame 30 includes two short-side frames 40 arranged opposite to each other and two long-side frames 50 arranged opposite to each other so as to surround the solar cell panel 20. The short side frame 40 and the long side frame 50 are connected adjacent to each other to constitute the frame 30. The short side frame 40 protects one side of the solar cell panel 20 having a rectangular planar shape, and the long side frame 50 protects the other side perpendicular to the one side. At this time, the short side frame 40 and the long side frame 50 are connected at a right angle.

  The short side frame 40 is a long member formed of, for example, an aluminum steel material or a resin and having a substantially identical cross section (YZ cross section) by extrusion molding or the like. The short side frame 40 includes an upper flange 41 that supports the light receiving surface of the solar cell panel 20, a back surface flange 42 that supports the back surface of the solar cell panel 20, and a side wall portion 43 that protects the side surface of the solar cell panel 20. .

  The upper flange 41 and the back flange 42 extend in the horizontal direction (inner direction of the solar cell module 10) from the side wall portion 43 to form a fitting groove 40x into which the solar cell panel 20 is fitted. The end portion of the solar cell panel 20 is fitted into the fitting groove 40x, and is adhered to the short side frame 40 with an adhesive (not shown). As the adhesive, for example, a butyl adhesive, a silicone adhesive, or the like can be used.

  In the solar cell module 10 according to the present embodiment, the cushioning material 60 is interposed between the back surface of the solar cell panel 20 and the back surface flange 42. The buffer material 60 has a function of pushing up the solar cell panel 20 from the back surface. As a result, the gap between the light receiving surface of the solar cell panel 20 and the upper flange 41 is eliminated, and the fitting groove 40x is formed from the light receiving surface of the solar cell panel 20. Suppresses entry of dirt, dust, rainwater, etc. into the interior. As the buffer material 60, for example, a foamed resin, an elastic resin, or the like can be used.

  A bottom flange 44 extends in the horizontal direction at the lower end of the side wall 43. Further, the short side frame 40 has screw holes 45 and 46 for connecting to the long side frame 50. 2 and 3, the bottom flange 44 extends horizontally inside the solar cell module 10, but the bottom flange 44 may extend horizontally outside the solar cell module 10. .

  In the longitudinal direction (X direction) of the short side frame 40, the upper flange 41 and the side wall portion 43 have the same length. The back surface flange 42 of the short side frame 40 is provided with a notch 42x at a location where it collides with the back surface flange 52 of the long side frame 50. The notch 42x is also provided in the conventional solar cell module.

  The long side frame 50 is a long member formed of, for example, an aluminum steel material or a resin and having a substantially identical cross section (XZ cross section) by extrusion molding or the like. The long side frame 50 includes an upper flange 51 that supports the light receiving surface of the solar cell panel 20, a back flange 52 that supports the back surface of the solar cell panel 20, and a side wall portion 53 that protects the side surface of the solar cell panel 20. .

  The upper flange 51 and the back flange 52 extend from the side wall portion 53 in the horizontal direction (inner direction of the solar cell module 10), and form a fitting groove 50x into which the solar cell panel 20 is fitted. The end portion of the solar cell panel 20 is fitted into the fitting groove 50x, and is adhered to the long side frame 50 with an adhesive.

  A bottom flange 54 extends horizontally at the lower end of the side wall 53. Further, the long side frame 50 has screw holes 55 and 56 for connecting to the short side frame 40. In the example of FIG. 4, the bottom flange 54 extends horizontally inside the solar cell module 10, but the bottom flange 54 may extend horizontally outside the solar cell module 10.

  The back flange 52 and the bottom flange 54 of the long side frame 50 are provided with notches 52x and 54x at locations where the back side flange 42 and the bottom flange 44 of the short side frame 40 collide with each other. The notches 52x and 54x are also provided in the conventional solar cell module.

  The upper flange 51 of the long side frame 50 is provided with a notch 51x at a location where it collides with the upper flange 41 of the short side frame 40, similarly to the back flange 52 and the bottom flange 54.

  The reason why the cutout 51x is provided is that, in order to connect the short side frame 40 and the long side frame 50 to each other, the upper flange of one frame is connected to the other upper flange so that the extended upper flanges do not collide with each other. This is because it is necessary to cut out only the length corresponding to the width of.

  In a conventional solar cell module frame (a frame in which no drainage groove is formed), the length L (Y direction) of the notch 51x of the upper flange 51 of the long side frame 50 is the width of the upper flange 41 of the short side frame 40. Notch is made equal to W (Y direction). That is, in the conventional solar cell module frame (frame in which no drainage groove is formed), the length L of the notch 51x = the width W of the upper flange 41.

  The important point here is that, in the solar cell module 10 according to the present embodiment, the length L of the notch 51x of the upper flange 51 of the long side frame 50 is set to the width W of the upper flange 41 of the short side frame 40. The length M is a plus value. That is, in the solar cell module 10, the length L of the notch 51x = the width W of the upper flange 41 + the predetermined length M. That is, in the longitudinal direction (Y direction) of the long side frame 50, the end portion of the upper flange 51 extends from the end portion of the side wall portion 53 in the longitudinal direction (Y direction) to the width W of the upper flange 41 by a predetermined length M. It is located inside by adding.

  Thereby, as shown in FIGS. 5 and 6, when the short side frame 40 and the long side frame 50 are combined, between the upper flange 51 of the long side frame 50 and the upper flange 41 of the short side frame 40, A gap 70 having a predetermined length M (Y direction) is formed. The gap 70 becomes a drainage path that is not obstructed by the upper flange 41 of the short side frame 40 and the upper flange 51 of the long side frame 50, and rainwater is drained as indicated by an arrow F in FIG.

  Here, FIG. 5 is a partially enlarged plan view of the portion B in FIG. 1, and FIG. 6 is a partially enlarged perspective view of the portion B in FIG. However, in FIG. 5, the solar cell panel 20 is shown in a satin pattern for convenience. Moreover, in FIG. 6, illustration of the solar cell panel 20 is omitted. Note that a gap 70 having a predetermined length M (Y direction) is also formed in the C portion, the D portion, and the E portion in FIG. 1 as in the B portion shown in FIGS. 5 and 6.

  The predetermined length M of the gap 70 (the width of the drainage path) can be about 2 to 60 mm, and preferably about 2 to 10 mm. If it is less than 2 mm, it may not be able to drain due to the surface tension of rainwater. On the other hand, if it is greater than 10 mm, the connection strength between the short side frame 40 and the long side frame 50 may be weak. . Therefore, it is preferable to determine the length M (the width of the drainage path) by the balance between the strength of the frame and the drainage function.

  As described above, in the solar cell module 10 according to the first embodiment, when the upper flange 51 of the long side frame 50 is notched, the width of the upper flange 41 of the short side frame 40 is not cut, In addition to the width of the flange 41, the notch is cut longer by a predetermined length M.

  By doing so, in the frame 30 surrounding the solar cell panel 20, a gap having a predetermined length M is provided between the upper flange 41 of the short side frame 40 and the upper flange 51 of the long side frame 50 connected to each other. 70 is formed. The gap 70 is a portion where the surface of the solar cell panel 20 is exposed. Conventionally, rainwater has accumulated due to the thickness of the upper flange, but in the solar cell module 10, the rainwater that accumulates on the surface of the solar cell module 10 is from the gap 70 that is the gap between the upper flange 41 and the upper flange 51. It will drain along the side of the module 10.

  What is important here is that, in the solar cell module 10, the notch width of the upper flange 51 of the long side frame 50 that has been conventionally notched for connection to each other is simply notched by a predetermined length M. is there. In other words, the drainage groove is not newly formed in the frame. Therefore, the processing man-hour of the frame is the same as the processing man-hour of the frame of the conventional technology (solar cell module not forming drainage grooves).

  Accordingly, since it is not necessary to perform the processing steps for separately providing the drainage groove on the upper flange of the frame, the solar cell module 10 can more easily form the drainage groove than the conventional solar cell module that forms the drainage groove. . That is, in the solar cell module 10, it is possible to drain rainwater that accumulates on the surface of the solar cell module 10 while suppressing an increase in the cost of the frame.

  Note that the solar cell module 10 is generally installed with an inclination of several degrees. In the solar cell module 10, since the gap 70 is provided in the vicinity of each corner of the solar cell module 10, the drainage effect can be obtained without depending on the inclination direction. For example, in FIG. 1, the drainage effect can be obtained even if the solar cell module 10 is inclined in the X direction or in the Y direction.

<Second Embodiment>
In 2nd Embodiment, the example which provides a drain hole in the side wall part of a long side frame is shown. In the second embodiment, description of the same components as those of the already described embodiments may be omitted.

  FIG. 7 is a partially enlarged perspective view illustrating the long side frame of the solar cell module according to the second embodiment. FIG. 8 is a partially enlarged perspective view illustrating a connection portion between the short side frame and the long side frame of the solar cell module according to the second embodiment. FIG. 9 is a partially enlarged front view of a portion G in FIG.

  7 to 9, in the solar cell module according to the second embodiment, the long side frame 50 is replaced with the long side frame 50A. A cutout 53x is provided in the side wall 53 of the long side frame 50A. The significance of providing the notch 53x in the side wall 53 of the long side frame 50A will be described below.

  When the solar cell panel 20 is fitted into the fitting grooves 40x and 50x of the frame 30, an adhesive (butyl adhesive, silicone adhesive, etc.) is injected into the fitting grooves 40x and 50x, and then the sun The battery panel 20 is fitted into the fitting grooves 40x and 50x. This is to prevent the solar cell panel 20 from being detached from the frame 30.

  Here, a gap may be formed between the adhesive and the frame 30 in the fitting grooves 40x and 50x, such as when the filling of the fitting grooves 40x and 50x with the adhesive is insufficient. If there is moisture intrusion in the gap, moisture may stay in the gap for a long time, and the adhesive or the end of the solar cell panel 20 may be deteriorated.

  In addition, as shown in FIG. 2, after the frame 30 and the solar cell panel 20 are fitted, the back surface flange 42 of the short side frame 40 and the back surface of the solar cell panel 20 may be bonded with an adhesive. In this case, since the fitting groove 40x is not filled with an adhesive, a gap is formed between the solar cell panel 20 and the short side frame 40 in the fitting groove 40x. For example, it is conceivable that moisture enters the gap formed in the fitting groove 40x through the gap 70.

  In the solar cell module in which a gap is formed between the solar cell panel 20 and the frame 30, a protective member having a substantially U-shaped cross section is disposed at the peripheral end of the solar cell panel 20. Is preferred. Specific examples of the protective member include a metal tape, an insulating resin tape, a gasket, and other materials that take moisture resistance and insulation into consideration.

  Also in this case, as described above, if there is moisture intrusion in the gap formed in the fitting groove 40x, the end of the solar cell panel 20 is in contact with moisture for a long period of time. Problems such as moisture intrusion may occur.

  Therefore, in the solar cell module according to the second embodiment, a cutout 53x (drain hole) is provided in the side wall portion 53 of the long side frame 50A. The notch 53x is provided in the side wall portion 53 of the long side frame 50A corresponding to the fitting groove 40x of the short side frame 40 when the short side frame 40 and the long side frame 50A are connected.

  For this reason, the through-hole 80 which connects the fitting groove 40x and the exterior of a solar cell module by the notch 53x and the short side frame 40 is formed. That is, the side wall 53 that closes the side opening of the fitting groove 40x has the through hole 80 that connects the fitting groove 40x and the outside. Thereby, the moisture accumulated in the fitting groove 40x of the short side frame 40 is drained to the outside of the solar cell module through the through hole 80. In particular, the provision of the gap 70 is effective as a method for draining the moisture when the moisture easily enters the gap formed in the fitting groove 40x. As long as the through hole 80 is formed, the cutout 53x may have any shape.

  Thus, in the solar cell module according to the second embodiment, the cutout 53x is provided in the side wall 53 of the long side frame 50A, and the through hole 80 that connects the fitting groove 40x and the outside of the solar cell module is formed. doing. As a result, even if moisture enters the fitting groove 40x, it can be drained to the outside of the solar cell module through the through hole 80. Other effects are the same as those in the first embodiment.

  The preferred embodiment has been described in detail above. However, the present invention is not limited to the above-described embodiment, and various modifications and replacements are made to the above-described embodiment without departing from the scope described in the claims. Can be added.

  For example, in the above embodiment, the upper flange of the long side frame is provided with a notch with a predetermined length added in order to form a gap (drainage groove). However, instead of this, a notch obtained by adding a predetermined length (a length corresponding to the width of the drainage groove) to the width of the long side frame may be provided on the upper flange of the short side frame.

  In addition, the short side frame and the long side frame are connected to each other by screwing. However, the present invention is not limited to this, and a mechanical fastener such as a rivet may be used instead of the screw. Alternatively, the positions in the height direction of the short side frame and the long side frame may be shifted, and the overlapping portions may be connected using a mechanical fastener such as a screw or rivet, and further, the mechanical fastener You may connect by the method of adhere | attaching with adhesives other than.

  Moreover, in this Embodiment, although it was the structure which provided a back surface flange in both a long side frame and a short side frame, the structure which provides a back surface flange only in any one may be sufficient.

  Further, even when the gap between the solar cell panel and the fitting groove is large and the solar cell panel moves in the vertical direction (Z direction in FIG. 2 etc.) within the fitting groove, the surface of the solar cell panel and the upper flange The present invention can be applied by partially inserting a buffer member therebetween to limit the movement in the fitting groove of the solar cell panel. Alternatively, instead of inserting the buffer member, a protrusion may be partially formed on the surface side of the solar cell panel of the upper flange to limit the movement in the fitting groove of the solar cell panel.

DESCRIPTION OF SYMBOLS 10 Solar cell module 20 Solar cell panel 30 Frame 40 Short side frame 40x, 50x Fitting groove 41, 51 Upper flange 42, 52 Back surface flange 42x, 51x, 52x, 53x, 54x Notch 43, 53 Side wall part 44, 54 Bottom side Flange 45, 46, 55, 56 Screw hole 50, 50A Long side frame 60 Buffer material 70 Gap 80 Through hole

Claims (3)

A solar panel,
A frame surrounding the periphery of the solar cell panel, and a solar cell module comprising:
The frame includes a first frame and a second frame connected adjacent to each other,
The first frame is
A first side wall for protecting the side surface of the solar cell panel;
A first upper flange extending from the first side wall and supporting the light receiving surface of the solar cell panel;
The second frame is
A second side wall for protecting the side surface of the solar cell panel;
A second upper flange that extends from the second side wall and supports the light receiving surface of the solar cell panel,
In the longitudinal direction of the first frame, the first side wall portion and the first upper flange have the same length,
In the longitudinal direction of the second frame, the end of the second upper flange extends inward from the end of the second side wall by a predetermined length added to the width of the first upper flange. A solar cell module, which is located in The planar shape of the solar cell panel is rectangular,
The solar cell module according to claim 1, wherein the first frame and the second frame are connected at a right angle. The first frame is
A fitting groove formed by the back surface flange supporting the back surface of the solar cell panel, the first side wall portion, and the first upper flange into which the solar cell panel is fitted;
The solar cell module according to claim 1 or 2, wherein the second side wall portion that closes the side opening of the fitting groove has a through hole that connects the fitting groove and the outside.

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