JP2017103884A - Solar cell module joint and solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module including a solar cell panel having a polygonal shape in which a first side and a second side intersect with each other at an obtuse angle in a plan view and in which frames are connected with a satisfactory appearance.SOLUTION: A solar cell module joint 30 as one mode of the disclosure includes: a first fit-in part 31 which is inserted into an inclined edge frame 13a; and a second fit-in part 32 which extends diagonally with respect to a longitudinal direction of the fit-in part from one end of the first fit-in part 31 and is inserted into a frame 13b. In the second fit-in part 32, at the inner face Sside facing to a solar cell panel 11, a concave part 33, into which an end of the inclined edge frame 13a is inserted, is formed.SELECTED DRAWING: Figure 6

Description

  The present disclosure relates to a solar cell module joint and a solar cell module.

  The solar cell module includes a solar cell panel, a module frame installed at an end edge of the panel, and a joint connecting a plurality of frames constituting the module frame (see, for example, Patent Document 1). As disclosed in Patent Document 1, a solar cell module generally has a substantially rectangular shape in a plan view, but a polygonal shape in a plan view in which the first and second sides intersect with an obtuse angle (for example, a plan view is omitted). A pentagonal solar cell module is also known.

JP 2011-114255 A

  By the way, the plurality of frames constituting the module frame are generally connected using joints in a state where the end faces of adjacent frames are abutted and the edges of the outer peripheral side surfaces are matched. However, in a solar cell module having a pentagonal shape in plan view, for example, it is not possible to connect the frames with the outer peripheral side surfaces aligned with the edges of the outer peripheral side surfaces of adjacent frames, and the appearance of the module may deteriorate. is there. An object of the present disclosure is to provide a joint that can be used in, for example, a solar cell module that includes a solar cell panel having a substantially pentagonal shape in plan view, and that can realize a frame connection configuration that improves the appearance of the module. It is.

  A joint for solar cell modules according to an aspect of the present disclosure includes a solar cell panel having a polygonal shape in plan view in which first and second sides intersect at an obtuse angle, and a module frame installed at an edge portion of the panel. The module frame is disposed along the first and second sides, respectively, and includes a first frame and a second frame having a hollow structure, and a cut angle of an end surface of the second frame is abutted against the end surface. A joint used in a solar cell module smaller than the cut angle of the first end face, a first insertion part inserted into the first frame, and one end of the first insertion part in the longitudinal direction of the insertion part The second insertion part is inserted into the second frame, and the end of the first frame is inserted into the second insertion part on the inner surface side facing the solar cell panel side. Concave formed To have.

  A solar cell module according to an aspect of the present disclosure includes a solar cell panel having a polygonal shape in plan view in which first and second sides intersect at an obtuse angle, a module frame installed at an edge of the panel, and the solar cell. A module frame, and the module frame is disposed along the first and second sides, respectively, and includes a first frame and a second frame having a hollow structure, and a cut angle of an end surface of the second frame is the end surface The joint for the solar cell module connects the first frame and the second frame, which is smaller than the cut angle of the end face of the first frame that is abutted with the first frame.

  According to the joint for solar cell modules that is one aspect of the present disclosure, in the solar cell module including the solar cell panel having a polygonal shape in plan view in which the first and second sides intersect at an obtuse angle, the connection of the frame having a good appearance A form can be obtained.

It is a top view of the solar cell module which is an example of embodiment. It is AA sectional view taken on the line in FIG. It is the B section enlarged view in FIG. It is the perspective view which looked at the B section in Drawing 1 from the 1st frame side (illustration omitted of a solar cell panel). It is a perspective view of the joint for solar cell modules which is an example of embodiment. It is a top view of the joint for solar cell modules which is an example of embodiment, Comprising: It is a figure which shows the state which inserted a part of joint into the 1st and 2nd frame. It is a figure which shows the connection form of the module frame at the time of using the joint for solar cell modules of a reference example.

  The joint for solar cell module which is one aspect of the present disclosure is a frame of which the end faces of adjacent frames are abutted and the frames are connected in a state where the edges of the outer peripheral side surfaces are matched, and the appearance of the module is improved. A connection form is realized. As will be described in detail later, in the first and second frames, for example, from the viewpoints of commonality of members, drainage, etc., the width of each frame is substantially the same, and the cut angle of the end face of the second frame projects into the end face. It is smaller than the cut angle of the end face of the first frame to be fitted. In this case, the area of the end face of the second frame having a small cut angle is larger than the area of the end face of the first frame having a large cut angle. That is, the end faces of the first and second frames that are abutted against each other do not completely coincide. If a common joint is used to connect the first frame and the second frame, for example, the end of the second frame jumps out of the module, and the frames can be connected with the outer peripheral surfaces aligned. Can not. For this reason, the appearance of the module is deteriorated, and it is not preferable from the viewpoint of safety. According to the joint for solar cell modules that is one aspect of the present disclosure, a connection form in which the outer peripheral side surfaces of the first and second frames are aligned without the end portion of the second frame protruding outward is obtained.

Hereinafter, an exemplary embodiment will be described in detail with reference to the accompanying drawings.
The drawings are all schematically described, and the dimensional ratios of the components drawn in the drawings should be determined in consideration of the following description. It is assumed from the beginning that a plurality of embodiments described below are appropriately combined.

  In this specification, the vertical direction of the module frame means the direction along the thickness direction of the solar cell panel (the light receiving surface side of the solar cell panel is up), the solar cell panel side of the module frame is the inner side, The opposite side is the outside. Also for the joint, the direction corresponding to the vertical direction of the module frame is the vertical direction, the solar cell panel side is the inside, and the side opposite to the solar cell panel is the outside. Further, the plan view means a state where the panel or the like is viewed from a direction perpendicular to the light receiving surface of the solar cell panel unless otherwise specified. Here, the light receiving surface of the solar cell panel is a surface on which sunlight is mainly incident, and more than 50% to 100% of the sunlight incident on the panel is incident from the light receiving surface. In addition, in the present specification, the description of “substantially **” is intended to include the case where substantially the same is recognized as substantially the same as the case where substantially the same is described as an example.

  Drawing 1 is a top view showing solar cell module 10 which is an example of an embodiment. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is an enlarged view of a portion B in FIG. As shown in FIGS. 1 to 3, the solar cell module 10 includes a solar cell panel 11, a module frame 13 installed at an edge portion of the panel, and a hypotenuse frame 13 a and a frame 13 b constituting the module frame 13. And a joint 30 to be connected. As will be described in detail later, the joint 30 can also be used to connect the hypotenuse frame 13a and the frame 13c.

  As shown in FIG. 1, the solar cell panel 11 is a panel having a polygonal shape in plan view in which an oblique side 11 a (first side) and a side 11 b (second side) intersect at an obtuse angle. In the present embodiment, the solar battery panel 11 has a substantially pentagonal shape in plan view, and a plurality of solar battery cells 12 are sandwiched between two protective members such as a glass substrate and two resin sheets that function as a sealing material. It has a structure. The module frame 13 includes an oblique side frame 13a (first frame) and a frame 13b (second frame) which are installed along the oblique side 11a and the side 11b and have a hollow structure. The module frame 13 is a member that protects the edge of the solar cell panel 11 and is used for fixing the solar cell module 10 to the roof, for example.

  The solar cell module 10 has a substantially pentagonal shape in plan view corresponding to the shape of the solar cell panel 11. The solar cell module 10 is attached to a dormitory roof, a square roof or the like together with a general module having a substantially rectangular shape in plan view, for example, and constitutes a solar power generation device. The solar cell device includes a row of solar cell modules along the roof girder direction, and the solar cell modules 10 are respectively provided at both ends of the row. The solar power generation device including the solar cell module 10 can effectively utilize the space near the end of the roof in the spar direction where the module cannot be installed when only the solar cell module having a substantially rectangular shape in plan view is used. The solar cell module 10 is attached to the roof, for example, by changing the direction at both ends of the row.

  The solar cell panel 11 having a substantially pentagonal shape in plan view further includes, for example, a side 11c (third side) intersecting with the oblique side 11a at an obtuse angle, and the angle formed between the oblique side 11a and the sides 11b and 11c is about 135 °. . The solar cell panel 11 has a side 11d (fourth side) substantially orthogonal to the side 11b and a side 11e (fifth side) substantially orthogonal to the sides 11c and 11d. In this embodiment, the sides 11b and 11c and the sides 11d and 11e have substantially the same length, and the hypotenuse 11a is inclined at an angle of about 45 ° with respect to the sides 11d and 11e. In this case, the same glass substrate, resin sheet, or the like can be used for the solar cell panels 11 of the solar cell modules 10 arranged at both ends of the row of the solar cell devices, and the management burden is reduced by sharing the members. Can be achieved.

  In the example shown in FIG. 1, the arrangement of the plurality of solar cells 12 constituting the solar cell panel 11 passes through the intersection of the side 11d and the side 11e of the solar cell panel 11 in plan view and is drawn perpendicularly to the oblique side 11a. Symmetric with respect to the line. Moreover, the planar view shape of the solar cell panel 11 is also bilaterally symmetrical with respect to the virtual line. In this case, it is possible to use the same solar cell panel 11 for the solar cell modules 10 arranged at both ends of the row of the solar cell devices by rotating 90 °, and further common use of members in the solar power generation device. Can be achieved. In addition, as for the solar cell panel 11, the planar view shape of the whole panel containing the wiring material (not shown) etc. which connect the photovoltaic cells 12 may be bilaterally symmetrical with respect to the said virtual line.

  The module frame 13 includes the oblique side frame 13a and the frame 13b installed along the oblique side 11a and the side 11b of the solar cell panel 11 as described above. Further, the module frame 13 includes frames 13c, 13d, and 13e (third, fourth, and fifth frames) installed along the sides 11c, 11d, and 11e, respectively. Each frame is a long member obtained by extruding a metal material such as aluminum, and has a hollow structure. Each frame is installed at the end edge of the solar cell panel 11 with the end faces formed at both ends in the longitudinal direction butting each other. The end faces of adjacent frames are preferably in contact with each other, and each frame is produced by cutting the extruded product in the width direction at an angle at which the end faces coincide, for example.

  The oblique side frame 13a is connected to the frames 13c and 13d using the joint 30 (see FIG. 3) in a state where the end surfaces 15a are in contact with the end surfaces 15b of the frame 13b and the end surfaces of the frame 13c, respectively. The frame 13d is arranged substantially orthogonal to the frames 13b and 13e and substantially parallel to the frame 13c. The frame 13e is disposed substantially orthogonal to the frames 13c and 13d and substantially parallel to the frame 13b. A generally L-shaped joint (not shown) can be used to connect the frames other than the oblique side frame 13a.

  In the present embodiment, notches 14 for flowing rainwater or the like are provided at both longitudinal ends of the frames 13d and 13e. The notch 14 is formed, for example, by cutting away the first flange that covers the edge of the light receiving surface of the solar cell panel 11. The cutout 14 may be provided only in the frame 13e located closest to the eaves side, but is preferably provided in the frames 13d and 13e in order to make the frames 13d and 13e common. Moreover, it is preferable that a drain hole (not shown) is formed in the lower part of the frames 13d and 13e.

  As shown in FIG. 2, the hypotenuse frame 13 a includes a main body portion 20 a and a first flange portion 21 a that is provided on the upper surface of the main body portion 20 a and holds the edge portion of the solar cell panel 11. In FIG. 2, the oblique side frame 13a is illustrated, but in the present embodiment, the other frames also have the same cross-sectional shape as the oblique side frame 13a, and the width and the vertical length of each frame are substantially the same. For example, the first flange portion 21a extends straight upward from the outside of the main body portion 20a, and is bent inwardly in the middle of the module to be formed in a substantially L shape. An inner groove 22a into which an end edge of the solar cell panel 11 can be inserted is formed between the upper surface of the main body 20a and the first flange 21a. That is, the 1st collar part 21a is standingly arranged on the main-body part 20a with the clearance gap which can insert the edge part of the solar cell panel 11 between the main-body parts 20a.

  The hypotenuse frame 13a has, for example, a second flange portion 23a that extends straight downward from the inside of the main body portion 20a and is bent in the middle of the module and formed in a substantially L shape. And the outer groove | channel 24a is formed between the lower surface of the main-body part 20a, and the 2nd collar part 23a. For example, a fixing fitting for fixing the solar cell module 10 to the roof is inserted into the outer groove 24a. In the example shown in FIG. 2, an inner collar portion 25 a extending to the opposite side (inside the module) from the second collar portion 23 a is provided at the lower end of the oblique side frame 13 a. The inner flange portion 25a is used for fixing the solar cell module 10 to the roof, for example, similarly to the outer groove 24a.

  The main body 20a preferably has a hollow, substantially quadrangular prism shape from the viewpoints of weight reduction, material cost reduction, rigidity improvement, and the like. The first insertion portion 31 (see FIG. 3) of the joint 30 is inserted into the internal space of the main body portion 20a having a hollow structure. In the form illustrated in FIG. 2, ribs 27a are provided on the inner surface of the main body 20a.

  The ribs 27a protrude from both sides in the width direction of the main body portion 20a and are located above the central portion in the vertical direction of the main body portion 20a. In this embodiment, the 1st insertion part 31 of the joint 30 is inserted in the accommodating part 26a which is a space located below the rib 27a among the internal spaces of the main-body part 20a. The rib 27a restrains the movement of the first insertion part 31 in the vertical direction by pressing the upper surface of the first insertion part 31, for example. Moreover, the hollow part 28a is formed in the inner bottom part of the main-body part 20a. Rainwater or the like may enter the internal space of the main body 20a. In this case, rainwater or the like can be easily discharged by the recess 28a even when the joint 30 is inserted into the main body 20a.

  As shown in FIG. 3, a joint 30 is used to connect the hypotenuse frame 13a and the frame 13b. The joint 30 includes a first insertion part 31 and a second insertion part 32, and the second insertion part 32 is formed with a recess 33 into which the end of the oblique side frame 13 a is inserted. In the solar cell module 10, both the frames are fixed to each other by inserting the first insertion portion 31 into the oblique side frame 13a and the second insertion portion 32 into the frame 13b. The joint 30 may be press-fitted into both frames, for example, or may be screwed.

The cut angles θ _13a and θ _13b of the end faces of the oblique side frame 13a and the frame 13b connected by the joint 30 are preferably different from each other from the viewpoint of commonality of members, drainage, and the like. In this embodiment, the cut angle theta _13b of the end face 15b of the frame 13b is smaller than the cut angle theta _13a of the end face 15a of the hypotenuse frame 13a to be butted to the end face. Here, the cut angle θ _13a means an angle formed by the outer peripheral side surface 16a and the end surface 15a of the hypotenuse frame 13a. Similarly, the cut angle θ _13b means an angle formed by the outer peripheral side surface 16b and the end surface 15b of the frame 13b. The outer peripheral side surface is a side surface (surface along the vertical direction) of each frame along the outer periphery of the module frame 13.

Furthermore, it is preferable that the cut angle θ _13c (not shown) of the end surface of the frame 13c that is abutted against the end surface 15a of the oblique side frame 13a is substantially the same as the cut angle θ _13b of the end surface 15b of the frame 13b. The cut angles θ _13a of the two end faces 15a of the oblique side frame 13a are substantially the same. Specifically, it is preferable that the cut angle θ _13a is about 90 °, and the cut angle θ _13b and the cut angle of each end face of the other frame are about 45 °. In this case, the same joint 30 can be used to connect the hypotenuse frames 13a and 13b and the hypotenuse frames 13a and 13c. The same L-shaped joint can also be used for connecting other frames.

  In the present embodiment, the lengths of the frames 13b and 13c are substantially the same, and the lengths of the frames 13d and 13e are substantially the same. Further, as described above, each frame constituting the module frame 13 has the same cross-sectional shape, and the width and the vertical length of each frame are substantially the same. In this case, the frames 13b and 13c can be shared, and the frames 13d and 13e can be shared. Note that the length of the oblique side frame 13 a is preferably the longest among the frames constituting the module frame 13. The length of each frame is generally substantially the same as the length of each corresponding side of the solar cell panel 11.

As shown in FIG. 4, when the cut angles θ _13a and θ _13b are different angles, the area of the end face 15b having a small angle is larger than the area of the end face 15a having a large angle. And a part of end surface 15b will be in the state which does not oppose the end surface 15a. In other words, if the widths of the oblique side frame 13a and the frame 13b are the same, if the cut angles θ _13a and θ _13b are set to different angles, the end faces 15a and 15b do not completely coincide with each other, and the end of the frame 13b faces outward or inward. Jump out. As will be described in detail later, according to the joint 30, the oblique side frame 13a and the frame 13b can be connected in a state where the end of the frame 13b does not protrude to the outside of the module but protrudes to the inside. The frame 13b has a main body portion 20b, a first flange portion 21b, an inner groove 22b, an inner flange portion 25b and the like, similarly to the oblique side frame 13a.

In the example shown in FIG. 4, the internal space of the main body 20b is exposed from the portion of the end face 15b that protrudes inside the module. Rain water or the like may enter the internal space of the frame 13b, and when rain water or the like enters, it is preferable to quickly discharge it. By making the cut angle θ _13b smaller than the cut θ _13a and exposing the internal space of the frame 13b, it becomes easy to drain rainwater and the like that have entered the internal space, and rainwater and the like accumulate in the frame 13b for a long time. Can be suppressed.

  In the present embodiment, part of the end surface of the frame 13c also protrudes from the position facing the end surface 15a of the oblique frame 13a to the inside of the module. In this case, it is assumed that rainwater or the like easily enters the frame 13c from the exposed internal space of the frame 13c. However, since the frame 13c is arranged along the roof ridge direction, Is easily discharged from the other end face. Rainwater or the like discharged from the other end face is discharged from the solar cell module 10 through a drain hole formed in the frame 13e, for example.

  Hereinafter, the joint 30 will be described in detail with further reference to FIGS. 5 and 6. FIG. 5 is a perspective view of the joint 30, and FIG. 6 is a plan view of the joint 30. FIG. 6 shows a state in which a part of the first insertion part 31 of the joint 30 is inserted into the oblique side frame 13a and a part of the second insertion part 32 is inserted into the frame 13b.

  As shown in FIG.5 and FIG.6, the joint 30 is a substantially V-shaped member bent in the middle. The joint 30 includes the first insertion portion 31 and the second insertion portion 32 as described above, and the second insertion portion 32 extends from one end of the first insertion portion 31 to the longitudinal direction of the insertion portion. Extending diagonally. In this specification, the 1st insertion part 31 and the 2nd insertion part 32 shall be divided | segmented by virtual line A1. Here, the imaginary line A1 is an imaginary line drawn inward from the corner 34 located outside the bent part of the joint 30 through the intersection of the imaginary line A2 and the imaginary line A3. Further, the virtual line A2 is a virtual line drawn along the longitudinal direction of the first insertion part 31 to the center part in the width direction of the insertion part, and the virtual line A3 is along the longitudinal direction of the second insertion part 32. This is an imaginary line drawn at the center in the width direction of the insertion part.

It is preferable that the joint 30 bends at substantially the same angle as the angle formed between the oblique side 11a and the side 11b of the solar cell panel 11. In the present embodiment, the angle θ ₃₀ formed between the virtual line A2 and the virtual line A3 is substantially the same as the angle formed between the oblique side 11a and the side 11b of the solar cell panel 11, and both are about 135 °. The angle theta ₃₀ is substantially the same as the angle obtained by adding the cut angle theta _13a, theta _13b.

  Although the length of the 1st insertion part 31 and the 2nd insertion part 32 may mutually differ, Preferably it is substantially the same mutually. That is, it is preferable that the joint 30 bends at the central portion in the longitudinal direction, and the corner portion 34 is formed at the central portion in the longitudinal direction. For example, both end portions in the longitudinal direction of the joint 30 (hereinafter sometimes referred to as “tip portions”) have a pointed shape with a gradually decreasing width as they approach the tip, and have a substantially triangular shape in plan view. In this case, the joint 30 can be easily inserted into the oblique side frame 13a and the frame 13b.

The width W ₃₀ of the joint 30 is substantially the same except for the tip portion of the joint 30 and the concave portion 33 of the second insertion portion 32, for example. Width W ₃₀ includes a main body portion 20a, 20b of the housing portion 26a, (see FIG. 2) the width W ₂₀ of 26b and is preferably slightly smaller than the substantially the same or the width W _20. Vertical length L ₃₀ of the joint 30 is, for example, substantially the same over the entire length. Vertical length L ₃₀ is housing portion 26a, it is preferable slightly shorter than the vertical length L ₂₀ is substantially the same or vertical length L ₂₀ of 26b. The vertical length L ₂₀ is the length from the upper end of the inner bottom of the main body portions 20 a and 20 b to the lower end of the rib 27.

The second insertion portion ₃₂ is formed with a recess 33 into which the end of the oblique side frame 13a is inserted on the inner surface S32 side facing the solar cell panel 11 side. The concave portion 33 is formed on the inner surface S ₃₂ side of the second insertion portion 32 at the end portion on the first insertion portion 31 side (hereinafter sometimes referred to as “root portion”), and the second insertion portion 32 to avoid interference between the oblique side frame 13a. By providing the concave portion 33 at the base portion of the second insertion portion 32, the joint 30 can be inserted deeper into the oblique side frame 13a. Thereby, it becomes possible to connect each frame in a state where the end of the frame 13b does not protrude outward. In other words, the recess 33 allows the joint 30 to be inserted to a position where a connection form of each frame where the outer peripheral side surfaces 16a and 16b are aligned is obtained.

Recess 33 is a inner surface S ₃₂ is recessed portion of the second insertion portion 32, it is preferably formed substantially at the same depth in the vertical direction of the second insertion portion 32. For example, the recess 33 is formed by cutting a metal material constituting the joint 30. In this case, it can be said that the concave portion 33 is a notch formed in the root portion of the second insertion portion 32. In the example shown in FIG. 6, the deepest portion 33 p is formed with a substantially trapezoidal concave portion 33 in plan view that is substantially flat along the longitudinal direction of the second insertion portion 32.

Recess 33, the inner surface S ₃₂ of the second insertion portion 32, from the position of the virtual line A4 at an angle corresponding to the corner portion 34 in the cut angle theta _13a of the end face 15a of the hypotenuse frame 13a is pulled toward the inside It is preferable that the film is formed deeply. In other words, the deepest portion 33p is formed at a deep position apart from the position of the virtual line A4 from the inner surface S ₃₂ of the second insertion portion 32. Note that the angle formed by the virtual line A4 and the outer surface of the first insertion portion in plan view is equal to the cut angle θ _13a .

The depth of the recess 33 is preferably deeper than the position of the imaginary line A4 as described above and less than or equal to ½ of the width of the second insertion portion 32. If the depth of the concave portion 33 is within the range, it is possible to prevent the second insertion portion 32 from interfering with the end portion of the oblique side frame 13a while securing the strength of the joint 30. Here, the depth of the recess 33, means the length along the width direction of the second insertion portion 32 from the extension line of the inner surface S ₃₂ to the deepest 33p in a plan view.

The concave portion 33 has a length exceeding the length corresponding to at least the thickness T ₂₀ (see FIG. 2) of the hypotenuse frame 13a in the longitudinal direction of the second insertion portion 32 from the boundary position (virtual line A1) of each insertion portion. Formed with. The thickness T _20, especially means a thickness of the inner wall of the body portion 20a. The length of the concave portion 33 along the longitudinal direction of the second insertion portion 32 is, for example, twice to 20 times the thickness T ₂₀ and is equal to or less than 1/3 of the length of the second insertion portion 32. preferable.

The shape of the recess 33 is not particularly limited, the concave portion 33 is preferred to be formed and steplessly continuously deepest 33p along the inner surface S ₃₁ of the first insertion portion 31. That is, it is preferable that a part of the wall surface of the recess 33 is flush with the inner surface S ₃₁ of the first insertion portion 31. In this case, for example, the distance between the corner 34 and the corner of the recess 33 is smaller than when the wall surface of the recess 33 is formed along the width direction of the second insertion portion 32 from the boundary position of each insertion portion. It becomes longer and the strength of the joint 30 is improved.

  Here, the effect of the joint 30 having the above-described configuration will be described in detail while comparing with the joint 50 of the reference example shown in FIG.

  The joint 50 shown in FIG. 7 is common to the joint 30 in that it includes a first insertion portion 51 that is inserted into the oblique frame 13a and a second insertion portion 52 that is inserted into the frame 13b. On the other hand, the joint 50 is different from the joint 30 in that the concave portion 33 is not formed in the second insertion portion 52. As shown in FIG. 7, when the joint 50 is used, the second insertion portion 52 hits the end of the hypotenuse frame 13a at the corner 55 formed in the bent portion, and therefore the joint 50 is installed in the hypotenuse frame 13a. Cannot be inserted any further.

  In such a state, when the second insertion portion 52 is inserted into the frame 13b and the end faces 15a and 15b are abutted, for example, the edges of the outer peripheral side surfaces 16a and 16b of each frame do not match, and the outer peripheral side surfaces 16a and 16b A step is formed in 16b. That is, the outer peripheral side surfaces 16a and 16b are not aligned and the end of the frame 13b protrudes to the outside of the module. Such a connection form deteriorates the appearance of the module and is not preferable from the viewpoint of safety. In the connection form shown in FIG. 7, the corner portion 54 of the joint 50 is not located at the boundary between the frames, but penetrates deeply into the frame 13b.

  On the other hand, when the joint 30 is used, the end of the hypotenuse frame 13a is located in a state in which the corner portion 34 is positioned at the boundary between the hypotenuse frame 13a and the frame 13b by the recess 33 formed in the second insertion portion 32. It can prevent that a part contacts the 2nd insertion part 32. FIG. That is, as shown in FIG. 3, when the joint 30 is used, the joint can be inserted deeper into the oblique side frame 13a than when the joint 50 is used. And the corner | angular part 34 can be located in the boundary of each flame | frame. In this state, when the second insertion portion 52 is inserted into the frame 13b and the end surfaces 15a and 15b are brought into contact with each other, the end portions of the second frame do not protrude outward, and the outer peripheral side surfaces of the first and second frames are projected. A connection form in which the edges coincide and the outer peripheral side surfaces are aligned is obtained.

DESCRIPTION OF SYMBOLS 10 Solar cell module, 11 Solar cell panel, 11a Oblique side, 11b-11e side, 12 Solar cell, 13 Module frame, 13a Oblique side frame, 13b-13e Frame, 14 Notch, 15a, 15b End surface, 16a, 16b Outer peripheral side , 20a, 20b body part, 21a, 21b first flange part, 22a, 22b inner groove, 23a second flange part, 24a outer groove, 25a, 25b inner flange part, 26a, 26b housing part, 27a rib, 28a hollow part , 30 joint, 31 first insertion part, 32 second insertion part, 33 recess, 33p deepest part, S ₃₁ , S ₃₂ inner surface, 34 corner part

Claims (5)

A solar cell panel having a polygonal shape in plan view in which the first and second sides intersect with an obtuse angle, and a module frame installed on an edge of the panel, the module frame having the first and second The first frame and the second frame having a hollow structure, the cut angle of the end face of the second frame being smaller than the cut angle of the end face of the first frame abutted against the end face A joint used in a battery module,
A first insertion portion to be inserted into the first frame;
A second insertion part that extends obliquely from one end of the first insertion part with respect to the longitudinal direction of the insertion part and is inserted into the second frame;
With
The solar cell module joint, wherein the second insertion portion has a recess into which an end of the first frame is inserted on the inner surface side facing the solar cell panel.   The concave portion is directed inwardly at an angle corresponding to a cut angle of an end surface of the first frame from a corner portion located at a boundary between the first and second insertion portions on the inner surface side of the second insertion portion. The joint for solar cell modules according to claim 1, wherein the joint is formed deeper than the position of the drawn virtual line.   The joint for solar cell modules according to claim 1 or 2, wherein the recess is continuously formed without a step along the inner surface of the first insertion part to the deepest part. A planar solar cell panel in which the first and second sides intersect at an obtuse angle;
A module frame installed at the edge of the panel;
The joint for solar cell modules according to any one of claims 1 to 3,
With
The module frame is installed along the first and second sides, respectively, and includes first and second frames having a hollow structure, and a cut angle of an end surface of the second frame is abutted against the end surface. Smaller than the cut angle of the end face of the first frame,
The solar cell module joint is a solar cell module that connects the first frame and the second frame. The solar cell panel includes a third side intersecting with the first side at an obtuse angle, and an angle formed by the first side and the second and third sides is approximately 135 ° in plan view. Having a pentagonal shape,
The module frame includes a third frame that is installed along the third side and has a hollow structure. The cut angle of the end surface of the third frame that abuts against the end surface of the first frame and the second frame The solar cell module according to claim 4, wherein the cut angle of the end face of the is substantially the same.

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