JP6505404B2 - Solar cell module - Google Patents

Description

  The present invention relates to a solar cell module.

  In general, a solar cell module includes a solar cell panel in which a solar cell element and a surface protective material (such as a cover glass) are laminated, and a frame material called a frame (a metal frame or the like) surrounding the peripheral end of the solar cell panel. It consists of

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

  A solar cell panel is fitted in a fitting groove formed by the upper flange and the back flange to form 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, so the thickness of the upper flange corresponds to a difference of about several mm at the peripheral edge of the solar cell module There is a difference in level between the surface and the frame surface.

  Here, since the solar cell module is installed outdoors, rainwater is collected on the surface of the solar cell module due to the above-described step. When the accumulated rainwater dries, dirt may be left at the place where the rainwater is deposited, and the remaining dirt may block the sunlight incident on the solar cell module, and may reduce the power generation efficiency of the solar cell module.

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

JP 2011-114257 A

  However, in the configuration in which the groove is provided on the upper flange of the frame as described above, the processing for providing the groove on the upper flange is required, and there is a problem that the manufacturing cost of the frame is increased.

  This invention is made in view of said point, and makes it a subject to provide the solar cell module which can drain the rain water which collects on the surface of a solar cell module, controlling the rise of the manufacturing cost of a flame.

The present solar cell module is a solar cell module including a solar cell panel and a frame surrounding the periphery of the solar cell panel, and the frame is disposed opposite to two first frames disposed facing each other. And two second frames, wherein the first frame and the second frame are alternately connected to form four corners, and the first frame protects the side surface of the solar cell panel A first side wall portion, and a first upper flange extending from the first side wall portion and supporting a light receiving surface of the solar cell panel, the second frame protecting a side surface of the solar cell panel And a second upper flange extending from the second side wall portion and supporting the light receiving surface of the solar cell panel, wherein the first side wall portion and the first side wall portion extend in the longitudinal direction of the first frame. Upper franc Is the same length in the longitudinal direction of the second frame, the second upper flange side of the second side wall portion is cut approximately the thickness of cut of the second upper flange, an end portion of the second upper flange Is positioned inward from the end of the second side wall in the longitudinal direction by adding a predetermined length to the width of the first upper flange, and the predetermined length is 2 mm or more and 10 mm or less, In each of the corner portions, a space is formed between the first upper flange of the adjacent first frame and the second upper flange of the second frame.

  According to the disclosed technology, it is possible to provide a solar cell module capable of draining rainwater accumulated 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 concerning a 1st embodiment. It is a partial expanded sectional view which follows the AA of FIG. It is a partially expanded perspective view which illustrates the short side frame of the solar cell module concerning a 1st embodiment. FIG. 6 is a partially enlarged perspective view illustrating the long side frame of the solar cell module according to the first embodiment. It is a partial enlarged plan view of the B section of FIG. It is a partial expansion perspective view of the B section of FIG. It is a partially expanded perspective view which illustrates the long side frame of the solar cell module concerning a 2nd embodiment. It is a partially expanded perspective view which illustrates the connection part of the short side flame | frame of a solar cell module which concerns on 2nd Embodiment, and a long side flame | frame. FIG. 9 is a partially enlarged front view of part G of FIG. 8;

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same components may be denoted by the same reference symbols and redundant description may be omitted.

First Embodiment
FIG. 1 is a plan view illustrating a solar cell module according to the first embodiment. FIG. 2 is a partially enlarged cross-sectional view taken along the line AA of FIG. FIG. 3 is a partially enlarged perspective view illustrating a 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.

  Referring to FIGS. 1 to 4, the solar cell module 10 has 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) And a protective member made of a white sheet tempered glass sheet or the like. There is also a case where a protective sheet made of aluminum foil, polyethylene terephthalate resin or the like is provided on the back surface side of the sealing material (opposite to the protective member).

  The planar shape of the solar cell panel 20 can be, for example, a rectangular shape. 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. The planar shape refers to the shape when the object is viewed from the normal direction of the light receiving surface of the solar cell panel 20.

  The frame 30 is attached in a frame shape so as to surround an 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 of the solar cell panel 20 to protect the end of the solar cell panel 20.

  The frame 30 includes two short side frames 40 disposed so as to surround the solar cell panel 20 and two long side frames 50 disposed so as to face each other. The short side frame 40 and the long side frame 50 are connected adjacent to each other to form a 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 formed of, for example, aluminum steel or resin, and is a long member whose cross section (YZ cross section) has a substantially same shape by extrusion molding or the like. The short side frame 40 has an upper flange 41 supporting the light receiving surface of the solar cell panel 20, a back surface flange 42 supporting the back surface of the solar cell panel 20, and a side wall 43 protecting the side surface of the solar cell panel 20. .

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

  In the solar cell module 10 according to the present embodiment, the buffer material 60 is interposed between the back surface of the solar cell panel 20 and the back surface flange 42. The cushioning material 60 has a function of pushing up the solar cell panel 20 from the back surface, and as a result, the gap between the light receiving surface of the solar cell panel 20 and the upper flange 41 is eliminated. Reduce the ingress of dust, dirt, rain water, etc. to the inside. As the buffer material 60, for example, a foamed resin, a resin having elasticity, or the like can be used.

  A bottom flange 44 extends horizontally at the lower end of the side wall 43. Furthermore, the short side frame 40 has screw holes 45 and 46 for connecting to the long side frame 50. In the examples of FIGS. 2 and 3, although the bottom flange 44 extends horizontally inward of the solar cell module 10, the bottom flange 44 may extend horizontally outward of the solar cell module 10. .

The upper flange 41 and the side wall portion 43 have the same length in the longitudinal direction (X direction) of the short side frame 40. On the back flange 42 of the short side frames 40, that have are provided notches 42x at a position clash the back flange 52 of the long side frame 50.

  The long side frame 50 is formed of, for example, aluminum steel or resin, and is a long member whose cross section (XZ cross section) has a substantially identical shape by extrusion molding or the like. The long side frame 50 has an upper flange 51 supporting the light receiving surface of the solar cell panel 20, a back surface flange 52 supporting the back surface of the solar cell panel 20, and a side wall 53 protecting the side surface of the solar cell panel 20. .

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

  A bottom flange 54 extends horizontally at the lower end of the side wall 53. Furthermore, 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 inward of the solar cell module 10, but the bottom flange 54 may extend horizontally outward of the solar cell module 10.

On the back flange 52 and bottom flange 54 of the long side frame 50, rear surface flange 42 and notches at positions clash with base flange 44 52x and 54x of the short side frames 40 that are provided.

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

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

  In the conventional solar cell module frame (frame without the drainage groove), the length L (Y direction) of the notch 51 x of the upper flange 51 of the long side frame 50 is equal to the width of the upper flange 41 of the short side frame 40 It is cut out so as to be equal to W (Y direction). That is, in the frame of the conventional solar cell module (the frame without the drainage groove), the length L of the notch 51 x is the width W of the upper flange 41.

On the other hand , in the solar cell module 10 according to the present embodiment, the length L of the notch 51 x of the upper flange 51 of the long side frame 50 is a predetermined length of the width W of the upper flange 41 of the short side frame 40. Ru Tei to the value plus a M. That is, in the solar cell module 10, the length L of the notch 51 x = 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 of the upper flange 51 has a predetermined length M in the width W of the upper flange 41 in the longitudinal direction (Y direction) from the end of the side wall portion 53. It is located inside by the amount of 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 of a predetermined length M (Y direction) is formed. The gap 70 serves as a drainage path which 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 the rain water is drained as shown by arrow F in FIG.

  Here, FIG. 5 is a partially enlarged plan view of a portion B of FIG. 1, and FIG. 6 is a partially enlarged perspective view of a portion B of 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 abbreviate | omitted. In addition, the gaps 70 of a predetermined length M (Y direction) are also formed in the portions C, D, and E in FIG. 1 as in the portions B illustrated in FIGS. 5 and 6.

  The predetermined length M (the width of the drainage path) of the gap 70 can be about 2 to 60 mm, and preferably about 2 to 10 mm. If it is less than 2 mm, drainage may not be possible due to the surface tension of rain water, while if it is more than 10 mm, the strength of the connection 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 cut out, the width of the upper flange 41 of the short side frame 40 is not cut out. In addition to the width of the flange 41, it is cut away by a predetermined length M.

  Thus, in the frame 30 surrounding the solar cell panel 20, a gap of a predetermined length M is formed 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 are formed. The gap 70 is where the surface of the solar cell panel 20 is exposed. In the past, rainwater was accumulated due to the thickness of the upper flange, but in the solar cell module 10, the rainwater accumulated on the surface of the solar cell module 10 is from the gap 70 which is the gap between the upper flange 41 and the upper flange 51 It will be drained along the side of the module 10.

Further, in the solar cell module 10, the notch width of the upper flange 51 of the long side frame 50 which has been cut away in order to connect to each other conventionally, it is only I notching bigger by a predetermined length M. In other words, the in is not greens formed in new frame groove of the drainage. Therefore, the number of processing steps of the frame is the same as the number of processing steps of the frame of the prior art (a solar cell module without a drainage groove).

  Therefore, since the number of processing steps for separately providing the drainage groove on the upper flange of the frame is unnecessary, the drainage groove can be formed more easily in the solar cell module 10 than in the conventional solar cell module forming the drainage groove. . That is, in the solar cell module 10, it is possible to drain the rainwater accumulated on the surface of the solar cell module 10 while suppressing the increase in the cost of the frame.

  In addition, it is common for the solar cell module 10 to be inclined and installed about several degrees. In the solar cell module 10, since the gaps 70 are provided in the vicinity of each corner of the solar cell module 10, the effect of drainage can be obtained without depending on the direction of inclination. For example, in FIG. 1, even if the solar cell module 10 is inclined in the X direction or in the Y direction, the effect of drainage can be obtained.

Second Embodiment
In the second embodiment, an example in which a drainage hole is provided in the side wall portion of the long side frame is shown. In the second embodiment, the description of the same components as those in the embodiments already described 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 partial enlarged perspective view illustrating the connection 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. The side wall 53 of the long side frame 50A is provided with a notch 53x. 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 (such as a butyl-based adhesive or a silicone-based adhesive) 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 coming off the frame 30.

  Here, when the filling of the adhesive into the fitting grooves 40x and 50x is insufficient, a gap may be formed between the adhesive and the frame 30 in the fitting grooves 40x and 50x. When moisture intrudes into the gap, the moisture may stay in the gap for a long period of time to deteriorate the adhesive or the end of the solar cell panel 20.

  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 by an adhesive. In this case, since the fitting groove 40x is not filled with the 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 intrudes into 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 as described above, a protective member having a substantially U-shaped cross section should be arranged at the peripheral end of the solar cell panel 20. Is preferred. As a specific example of a protection member, it is comprised with the material which considered moisture resistance and insulation, such as a metal tape, an insulating resin tape, and also a gasket.

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

  So, in the solar cell module which concerns on 2nd Embodiment, the notch 53x (drainage hole) is provided in the side wall part 53 of long side flame | frame 50A. The notch 53 x is provided in the side wall 53 of the long side frame 50 A corresponding to the fitting groove 40 x of the short side frame 40 when the short side frame 40 and the long side frame 50 A are connected.

  For this reason, the through hole 80 connecting the fitting groove 40x and the outside of the solar cell module is formed by the notch 53x and the short side frame 40. That is, the side wall portion 53 closing the side opening of the fitting groove 40x has a through hole 80 connecting the fitting groove 40x and the outside. Thus, the water collected in the fitting grooves 40x of the short side frame 40 is drained to the outside of the solar cell module through the through holes 80. In particular, when water easily intrudes into the gap formed in the fitting groove 40x by providing the gap 70, it is effective as a method for draining the water. The notch 53x may have any shape as long as the through hole 80 is formed.

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

  Although the preferred embodiments have been described above in detail, the present invention is not limited to the above-described embodiments, and various modifications and substitutions may be made to the above-described embodiments 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 having a predetermined length added in order to form a gap (a drainage groove). However, instead of this, the upper flange of the short side frame may be provided with a notch obtained by adding a predetermined length (length corresponding to the width of the drainage groove) to the width of the long side frame.

  In addition, although the short side frame and the long side frame are configured to be screwed and connected to each other, the present invention is not limited thereto, and may be connected using a mechanical fastener such as a rivet instead of a 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 a rivet, and further, the mechanical fastener You may connect by the method of adhere | attaching with adhesives etc. other than.

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

  In addition, even when the gap between the solar cell panel and the fitting groove is large and the solar cell panel is movable in the fitting groove in the vertical direction (Z direction in FIG. 2 etc.), the surface of the solar cell panel and the upper flange The present invention is applicable by partially inserting a buffer member between the two to limit the movement of the solar cell panel in the fitting groove. 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 of the solar cell panel in the fitting groove.

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 Buffering material 70 Gap 80 Through hole

Claims (4)

With solar panels,
A frame surrounding the periphery of the solar cell panel;
The frame comprises two first frames arranged opposite to each other, and two second frames arranged opposite to each other,
The first frame and the second frame are alternately connected to form four corners,
The first frame is
A first side wall portion that protects the side surface of the solar cell panel;
A first upper flange extending from the first side wall and supporting a light receiving surface of the solar cell panel;
The second frame is
A second side wall portion that protects the side surface of the solar cell panel;
And a second upper flange extending from the second side wall portion and supporting a 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 second upper flange side of the second side wall portion is cut out by an approximate thickness of the second upper flange, and an end portion of the second upper flange is the second side wall portion A width of the first upper flange plus a predetermined length in a longitudinal direction from an end of the
The predetermined length is 2 mm or more and 10 mm or less,
A solar cell module, wherein a gap is formed between the first upper flange of the adjacent first frame and the second upper flange of the second frame at each of the corner portions. 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 right angles. The first frame is
It has a back surface flange for supporting the back surface of the solar cell panel, and a fitting groove formed by 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 closing the side opening of the fitting groove has a through hole connecting the fitting groove and the outside.   The buffer material is interposed between the back surface of the said solar cell panel, and the said back surface flange, The solar cell module of Claim 3 characterized by the above-mentioned.

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