JP2016213959A - Solar cell module and frame body therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module, using frame bodies in which mutually adjacent frame pieces are fixed to each other using a bonding member, enabling the acquisition of sufficient fixation strength between the frame pieces and the bonding member.SOLUTION: In the solar cell module, each connection member is inserted into a hollow of a first frame piece and a hollow of an adjacent second frame piece, so that the frame pieces can be connected with each other. A salient of a processing part provided on a frame piece is configured to be fit to a recess of the bonding member. The formation of the salient on the frame piece to have a slope surface shape enables increased fixation strength between the frame piece and the bonding member.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a solar cell module and a solar cell module frame, and more particularly to a solar cell module in which a frame is attached to a solar cell module body and a solar cell module frame used in the solar cell module.

  In recent years, interest in global environmental issues has been increasing, and new energy technology using natural energy has attracted much attention. In particular, photovoltaic power generation that converts light energy into electrical energy using the photoelectric conversion effect is widely performed as a means for obtaining clean energy.

  The solar cell element is produced using, for example, a single crystal silicon substrate or a polycrystalline silicon substrate. When a silicon substrate is used as a solar cell element, the electric output generated by one solar cell element is small, so that a plurality of solar cell elements can be connected to obtain a practical electric output. Are electrically connected to form a solar cell module body.

  When a solar cell element using a silicon substrate is used, the solar cell module body includes a plurality of solar cells connected in series or in parallel between a transparent substrate (glass) on the light receiving surface side and a back cover on the back surface side. Elements are arranged side by side, and these solar cell elements are sealed and integrated with a sealing resin. As a solar cell element which comprises a solar cell module main body, a compound semiconductor and a thin film type solar cell other than a single crystal silicon solar cell and a polycrystalline silicon solar cell may be sufficient.

  Furthermore, the solar cell module which attached the frame to the outer peripheral part of this solar cell module main body is formed. A buffer material such as an end face sealing member or an adhesive may be disposed between the solar cell module main body and the frame. Moreover, by using a structure having a hollow portion that is substantially rectangular in cross section, a light and high strength frame can be obtained.

  FIG. 12 is a schematic exploded perspective view of the frame of the solar cell module disclosed in Patent Document 1. A frame 20 is provided in a frame shape surrounding the module body. The module body is inserted into the groove 20 a of the frame body 20. The frame 20 includes four frame pieces and a connecting member 25 that connects two adjacent frame pieces (for example, the frame piece 22 and the frame piece 24 in FIG. 12).

  The connection member 25 is provided in a substantially L shape, the second insertion portion 25b of the connection member is inserted into the insertion hole 20B1 of the frame piece, and the first insertion portion 25a is inserted into the insertion hole of the adjacent frame piece. Is done. In the frame having such a structure, it is desirable that the frame is not easily detached after the insertion portion of the connection member is inserted into the insertion hole. As an example, it is disclosed that unevenness is provided on the surface where the insertion portion and the insertion hole are in contact with each other so that the mutual frictional force after insertion is increased so as not to be easily separated.

JP2013-183092A

  However, Patent Document 1 does not disclose a specific structure of unevenness provided on a surface where the insertion portion of the connection member and the insertion hole of the frame contact.

  If sufficient fixing strength is not obtained in the insertion portion and the insertion hole, adjacent frames may be separated when a large load is applied to the solar cell module.

  A solar cell module in which a frame is attached to each side of a solar cell module body of the present invention, wherein the frame includes a first frame piece having a hollow portion and a hollow portion adjacent to the first frame piece. Having a connecting member for connecting the first and second frame pieces to each other by being inserted into the hollow portion of the first frame piece and the hollow portion of the second frame piece. The first frame piece has a convex portion in the hollow portion, the connecting member has a bent portion and a concave portion that engages with the convex portion, and at least the surface on the bent portion side of the convex portion is an inclined surface. It is characterized by that.

  According to the present invention, it is possible to obtain a strong connection between adjacent frames.

1 is a schematic perspective view of a solar cell module according to a first embodiment of the present invention. It is a schematic perspective view which shows the frame and connection member of the solar cell module which are the 1st Embodiment of this invention. It is a schematic perspective view which shows the frame piece and connecting member of the solar cell module which are the 1st Embodiment of this invention. It is a schematic sectional drawing which shows the fitting part of the tooth-like part of the connection member of the solar cell module which is the 1st Embodiment of this invention, and the process part of a frame piece. It is a schematic perspective view which shows the frame piece and connection member of a solar cell module which are the 2nd Embodiment of this invention. It is a schematic perspective view which shows the frame piece and connection member of a solar cell module which are the 3rd Embodiment of this invention. It is schematic-drawing sectional drawing which shows the fitting part of the tooth-like part of the connection member of the solar cell module which is the 4th Embodiment of this invention, and the process part of a frame piece. It is the schematic which shows the frame piece and connection member of a solar cell module which are the 5th Embodiment of this invention. It is schematic-drawing sectional drawing which shows another example of the connection member of the solar cell module which is the 5th Embodiment of this invention. It is a schematic perspective view which shows the process part of the frame piece of the solar cell module which is the 6th Embodiment of this invention. It is a schematic perspective view which shows the process part of the frame piece of the solar cell module which is the 7th Embodiment of this invention. It is a schematic perspective view which shows the solar cell module of a prior art example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

[Embodiment 1]
FIG. 1 is a schematic perspective view of the solar cell module according to the first embodiment of the present invention viewed from the light receiving surface side. The solar cell module 1 is configured by fitting a frame body 200 in a frame shape around the periphery of the solar cell module body 10. The frame body 200 includes first frame pieces 210 and 211, second frame pieces 220 and 221 and a connecting member that face each other. The solar cell module 1 is used in a solar power generation system by being installed on a gantry or a roof.

  FIG. 2 is a schematic perspective view showing the frame of the solar cell module according to the first embodiment of the present invention. Adjacent frame pieces are connected using a joining member 300. Since the solar cell module body is substantially rectangular, there are four places where adjacent frame pieces are connected to each other, and there are four connecting members 300. The frame piece is formed by extrusion molding of a metal such as aluminum. The connecting member 300 is formed by extrusion molding of a metal such as aluminum or bending of a metal plate.

  All of the four frame pieces are cut at approximately 45 degrees at both end faces in the length direction, and the adjacent frame pieces are arranged without a gap. The cut angle of the end face of the frame piece is not limited to 45 degrees, and any structure may be used as long as each hollow portion corresponds to the surface where the first frame piece and the second frame piece are connected. For example, one frame piece can be combined with a 60-degree cut, and the other frame piece can be combined with a 30-degree cut.

  FIG. 3 is a schematic perspective view in which a portion A in FIG. 2 is enlarged, and shows a part of the connection member 300 and the first frame piece 211.

  The first frame piece 211 has a fitting part 212 having a substantially U-shaped cross section and a hollow part 213 for fitting the solar cell module main body. The fitting part 212 is located on the light receiving surface side of the hollow part 213.

  The side part of the solar cell module body 10 is fitted into the fitting part 212. An end face sealing member may be inserted between the solar cell module main body 10 and the fitting portion 212. As the end face sealing member, silicone resin, butyl rubber, or the like can be used. The end surface sealing member is in close contact with the end surface of the solar cell module body, thereby preventing moisture from entering the inside from the end surface of the solar cell module body. Further, the end surface sealing member also has a function of making it difficult for the frame body to be detached from the solar cell module body.

  The hollow part 213 is a space composed of four wall surfaces including a hollow inner wall 213c and a hollow outer wall 213d facing each other. A partition piece 214 is formed in the hollow portion 213. The hollow portion 213 is partitioned by the partition piece into a first space 213a and a second space 213b below the first space.

  A processed portion 400 is formed in the hollow portion inner wall 213c. The processed part 400 is a part processed so as to form a convex part in the first space 213a of the hollow part. The processing unit 400 is formed by pressing the frame piece 211. In the present embodiment, two pieces are arranged at the end portion of the first frame piece 211 substantially parallel to the end face of the frame piece. Although not shown in the drawing, a total of four processing parts 400 are arranged, two at each end of the first frame piece 211.

  The connection member 300 has an L-shape, and the connection piece end portion 301 has a tapered structure so that it can be easily inserted into the first space 213a of the hollow portion. The connecting member 300 has a bent portion 302 bent at approximately 90 degrees. Further, a concave portion 303 is provided between the connecting piece end portion 301 and the bent portion 302. The recesses 303 are a plurality of grooves that are substantially triangular in cross-sectional view and are formed from end to end in the height direction H of the connection member. The connection member 300 is fixed to the first frame piece 211 by inserting the connection piece end portion 301 of the connection member into the first space 213 a and further fitting into the first space 213 a up to the bent portion 302. The connecting member 300 is engaged with the first frame piece 211 by the concave portion 303 of the connecting member engaging the convex portion of the processed portion 400. Since there are a plurality of convex portions of the processed portion 400, the joining member 300 and the first frame piece 211 can be more firmly engaged. Further, by arranging a plurality of components, it is possible to prevent the protrusions from being damaged even when a large load is applied to the solar cell module. This is because the load applied to the convex portion of each processed portion is small.

  Furthermore, the convex parts of the two processed parts 400 are arranged in one groove-shaped concave part 303 by arranging the convex parts of the two processed parts 400 substantially parallel to the end surface of the frame piece 211. It will be. By arranging such processed parts, it is possible to prevent a part of the concave part from hitting the convex part of the processed part a plurality of times when the connection member 300 is inserted into the first space 213a of the hollow part. Therefore, it is difficult for the shape of the concave portion to change when the connecting member is inserted, and a stable fixing strength can be obtained.

  Further, the cross-sectional shape of the outer shape in the vicinity of the bent portion 302 of the connection member 300 is substantially the same as the cross-sectional shape of the first space 213a, and the first space 213a is inserted by fitting the connection member 300 to the bent portion 302. The end of the is closed.

  Since the connection member 300 has an L-order shape, there are two connection piece ends. The same applies to the structure in which the other connecting piece end is fitted into the second frame piece 220 adjacent to the first frame piece 211 and the concave portion of the connecting member and the convex portion of the frame piece are fitted. Moreover, although one corner | angular part was demonstrated using FIG. 3, it cannot be overemphasized that it is the same also about the other three corner | angular parts.

  FIG. 4 is a schematic cross-sectional view showing a state in which the concave portion of the connection member and the convex portion of the processed portion of the frame piece are fitted to each other. FIG. 4A is a diagram illustrating the present embodiment, and FIG. 4B is a diagram illustrating a comparative example.

As shown in FIG. 4A, the recess 303 of the connection member has a substantially isosceles triangle shape in cross-sectional view. Further, the surface on the bent portion side of the connecting member of the convex portion of the processed portion 400 of the frame piece has a slope shape.
The surface on the bent portion side of the connecting member is a surface that contacts the surface located on the bent portion side of the concave portion of the connecting portion when the concave portion of the connecting member and the convex portion of the processed portion of the frame piece are fitted together.
In the present embodiment, the surface on the connecting piece end portion side of the connecting member of the convex portion of the processed portion 400 of the frame piece is also inclined, and the convex portion has a substantially isosceles triangle shape in cross-sectional view. The surface on the connection piece end side of the connection member is a surface that comes into contact with the surface located on the connection piece end side of the recess of the connection portion when the recess of the connection member and the projection of the processed portion of the frame piece are fitted together. is there.

  FIG. 4B shows a comparative example. The difference from the present embodiment shown in FIG. 4A is the shape of the processed portion of the frame piece. The convex part of the processed part 40 of the frame piece has a substantially quadrangular shape in sectional view. The concave portion 33 of the connecting member has a substantially isosceles triangle shape in cross-sectional view similar to the present embodiment.

  By making the surface on the bent part side of the connecting member of the convex part of the processed part an inclined surface, the fixing strength between the connecting member and the frame piece could be improved as compared with the comparative example. This is because the contact area between the surface on the bent portion side of the connecting member of the convex portion of the processed portion of the frame and the surface on the bent portion side of the concave portion of the connecting member is increased, the frictional force increases, It is thought that it became difficult to move.

  Further, in the case of the shape shown in the comparative example, when a very large load is applied to the solar cell module, the connection member may be detached from the frame piece. When the situation was confirmed in detail, the convex part of the processed part of the frame piece was detached. Since the contact area between the concave portion 33 of the connecting member and the convex portion of the processed portion 40 is small, it is considered that the force is concentrated on the contact portion and the fracture occurs. In the present invention, the surface on the bent portion side of the connecting member of the convex portion of the processed portion is an inclined surface, so that the contact area with the concave portion of the connecting member is increased, and local force concentration can be prevented. became.

  In the present embodiment, since the surface of the connecting part piece side of the connecting part of the convex part of the processed part of the frame piece is also inclined, the fitting with the concave part of the connecting member is facilitated.

  Moreover, in this Embodiment, the cavity part was provided not in the surface of the connection member but in the inside. By providing the cavity, it was possible to reduce the weight while maintaining the strength.

  In the present embodiment, the structure is such that the convex portions of the processed portions of the two frame pieces are fitted to one groove-like concave portion of the connecting member, but three or more convex portions may be fitted. Needless to say. The larger the number, the higher the fixing strength.

[Embodiment 2]
FIG. 5 is a schematic perspective view of a connecting member constituting a solar cell module showing a second embodiment of the present invention. The difference from the first embodiment is the shape of the recess. FIGS. 5A and 5B are schematic perspective views of the same joining member viewed from different angles.

  In the present embodiment, the concave portion 313 of the connection member 310 is formed only at a position corresponding to the convex portion of the processed portion of the first frame piece. The number of convex portions of the processed portion of the first frame piece and the number of concave portions of the connecting member are the same. In the present embodiment, since there are two convex portions of the processed portion, there are also two concave portions of the connecting member. The width of the concave portion was made larger than the width of the convex portion so that the convex portion of the processed portion of the frame piece fits smoothly into the concave portion of the connection member.

  By adopting such a concave shape, the thickness of the connecting member is reduced compared to the case where the concave portion has a groove-like structure cut out from end to end in the height direction. The connecting member itself is more difficult to deform. Since the connection member is less likely to be deformed, it is possible to increase the fixing strength with the frame piece.

[Embodiment 3]
FIG. 6 is a schematic perspective view of a connecting member constituting a solar cell module showing a third embodiment of the present invention. 6A and 6B are schematic perspective views when the same joining member is viewed from different angles. The difference from the first embodiment is that the recess is not provided from end to end in the height direction of the connection member.

  In the present embodiment, the recess 323 of the connection member 320 is not provided from end to end in the height direction (H direction in FIG. 6) of the connection member, and a flat portion 324 is provided in the middle. Yes. By providing the flat portion, the strength of the connecting member can be increased. This is because the connection member itself is less likely to be deformed because the number of places where the connection member is thin is reduced.

  Moreover, the number of the recessed parts provided in the insertion direction (L direction in FIG. 6) to the frame piece of the connection member is larger than the number of the convex parts provided in the second frame piece. Specifically, since there is only one convex portion in the insertion direction, there is one concave portion of the connection member necessary for fitting the convex portion, but there are eight concave portions in the insertion direction. By adopting such a structure, it becomes possible to increase the degree of freedom of the formation position of the convex part of the processed part of the frame piece. This is because strict alignment between the concave portion of the joining member and the convex portion of the processed portion of the frame is not necessary.

  In the present embodiment, the case where the flat portion is provided at the center portion in the height direction H has been described, but the flat portion may be provided at the end in the height direction of the joining member. Flat portions may be provided at both ends in the height direction, and flat portions may be provided at both ends and the central portion.

[Embodiment 4]
FIG. 7 is a schematic cross-sectional view showing a fourth embodiment of the present invention. FIG. 7A is a cross-sectional view of the connecting member, and FIG. 7B is a diagram showing a schematic cross-section that fits the concave portion of the connecting member and the convex portion of the processed portion. The difference from the first embodiment is the shape of the concave portion of the connection member and the shape of the convex portion of the processed portion of the frame.

  As shown in FIG. 7A, the recess 333 of the connection member 330 has a substantially right triangle shape in cross-section. More specifically, the surface of the connection member of the concave portion 333 on the bent portion 332 side is an inclined surface, and the surface on the connection piece end portion 331 side is a substantially vertical surface.

  Moreover, as shown in FIG.7 (b), the convex part of the process part 430 of a frame piece has the shape of the cross-sectional view substantially right-angled triangle which has the vertical surface 430a. The vertical surface 430a is a surface substantially perpendicular to the direction in which the connection member is inserted into the frame piece. Similarly, the vertical surface 333a of the recess 333 of the connection member is also a surface substantially perpendicular to the direction in which the connection member is inserted into the frame piece. The processed part 430 of the frame piece fits into the recessed part 333 of the joining member and is fitted.

  By making the surface of the convex portion of the processed portion of the frame piece on the side of the connecting piece end portion a substantially vertical surface, it is possible to make it difficult for the connecting member to come out of the frame piece. Furthermore, the connection member can be made more difficult to come off from the frame piece by making the surface on the connection piece end side of the concave portion of the connection member vertical as shown in the present embodiment. When a force in the direction in which the connecting member comes off is applied, the vertical surface 333a of the concave portion of the connecting member corresponds to the vertical surface 430a of the convex portion of the processed portion. This is because the vertical surface 333a and the vertical surface 430a are surfaces that are substantially perpendicular to the direction in which they are removed.

  As a method of fitting the convex part of the processed part of the frame piece and the concave part of the connecting member, a method of performing press working in a state where the connecting member is inserted into the hollow part of the frame piece, and a connecting member on the frame piece in which the processed part is formed There is a way to insert. Since the length of the frame piece increases with the increase in the size of the solar cell module, it is difficult to perform press work in a state where the connection member is inserted into the hollow portion of the frame piece. Therefore, for the purpose of improving workability, there is a case where a method of inserting the connecting member into the frame piece in which the processed portion is formed in advance is selected. When the method of inserting the connection member into the frame piece in which the processed portion is formed is selected, the structure of the present embodiment has an advantage that the connection member can be easily inserted into the hollow portion of the frame piece. This is because the convex part of the processed part of the frame piece has an acute slope with respect to the insertion direction of the connecting member.

[Embodiment 5]
FIG. 8 is a schematic view of a solar cell module showing a fifth embodiment of the present invention. FIG. 8A is a schematic cross-sectional view of the connection member, and FIG. 8B is a schematic perspective view of the second frame piece. The difference from the fourth embodiment is that the concave portion 343 of the connection member 340 is formed not on the inner side but on the outer side in the bending direction of the connection member. Moreover, the convex part 440 of the process part of a 2nd frame piece is formed in the surface at the side of the hollow part of the hollow part outer wall which comprises the hollow part of a frame piece.

  By adopting such a structure, it is possible to improve workability when using a fitting process of forming a processed part of the frame piece after fitting the concave part of the connecting member and the convex part of the processed part of the frame piece. it can. This is because the outside of the frame piece is processed, so that the work is easy to perform.

  FIG. 9 shows another example of the present embodiment. As shown in FIG. 9, the concave portion 353 may be provided both inside and outside the bending direction of the connection member 350. By forming the recesses on the inner side and the outer side, it is possible to obtain higher fixing strength.

[Embodiment 6]
FIG. 10 is a schematic perspective view showing the solar cell module according to the sixth embodiment of the present invention. The difference from the fourth embodiment is that the convex portion of the processed portion is fitted into a plurality of concave portions formed in the insertion direction of the connecting member.

  In the present embodiment, four processed portions 450 are provided at one end of the frame piece. Since four processed portions are provided at both ends of the frame piece, there are eight processed portions as the entire frame piece. In the present embodiment, three recesses are arranged in the insertion direction of the connection member. The convex portions of the two processed portions are fitted into the concave portion on the bent portion side of the connection member, and the convex portions of the two processed portions are fitted into the concave portion on the connection piece end portion side.

  By adopting a structure in which the convex part of the processed part fits into a plurality of concave parts arranged in the insertion direction of the connecting member, even when a rotational force is applied to the connecting member, a force is applied to only one processed part. It is possible to prevent this and maintain a higher fixing strength.

[Embodiment 7]
FIG. 11 is a schematic perspective view showing the solar cell module according to the seventh embodiment of the present invention. The difference from the fourth embodiment is the number and arrangement of processed parts.

  In the present embodiment, five processed portions 460 are formed at one end of the frame piece. At least three recesses are provided in the insertion direction of the connecting member. The convex portions of the two processed portions fit into the concave portion on the bent portion side of the connecting member, the convex portions of the two processed portions in the concave portion on the end of the connecting piece, and the convex portion of one processed portion in the central concave portion. The protrusions of the five processed parts in total are fitted into the structure. With such a structure, even when a large load is applied to the solar cell module without increasing the number of convex portions of the processed portion more than necessary, sufficient fixing strength between the connection member and the frame piece is maintained. It became possible.

  As mentioned above, although Embodiment 1 to Embodiment 7 was specifically described, the present invention is not limited to them. Embodiments obtained by appropriately combining the technical means disclosed in the seven embodiments described above are also included in the technical scope of the present invention.

  In addition, embodiment disclosed this time is an illustration in all the points, Comprising: It does not become the basis of limited interpretation. Therefore, the technical scope of the present invention is not interpreted only by the above-described embodiments, but is defined based on the description of the scope of claims. Moreover, all the changes within the meaning and range equivalent to a claim are included.

DESCRIPTION OF SYMBOLS 1 Solar cell module 10 Solar cell module main body 200 Frame body 210, 211 1st frame piece 220, 221 2nd frame piece 212 Fitting part 213 Hollow part 214 Partition piece 300,310,320,330,340,350 Connection member 301, 331 Connection piece end portion 302, 332 Bending portion 303. 313, 323, 333, 343, 354 Recessed portion 400, 410, 420, 430, 440, 450, 460 Processing portion

Claims (5)

A solar cell module in which a frame is attached to each side of the solar cell module body,
The frame includes a first frame piece having a hollow portion, and a second frame piece having a hollow portion adjacent to the first frame piece,
Having a connecting member for connecting the first and second frame pieces to each other by being inserted into the hollow portion of the first frame piece and the hollow portion of the second frame piece;
The first frame piece has a convex portion in the hollow portion,
The connecting member has a bent portion and a concave portion to be fitted with the convex portion,
The solar cell module in which at least the surface on the bent portion side of the convex portion is an inclined surface.   2. The solar cell module according to claim 1, wherein a surface of the convex portion opposite to the bent portion is a surface substantially perpendicular to an insertion direction in which the connection member is inserted into the hollow portion of the first frame piece.   The solar cell module according to claim 1 or 2, wherein a plurality of the convex portions are fitted into one concave portion of the connection member. A plurality of the recesses are formed with respect to an insertion direction in which the connection member is inserted into the hollow portion of the first frame piece,
The solar cell module according to claim 1, wherein the convex portions are fitted into the plurality of concave portions. A frame for a solar cell module,
The frame includes a first frame piece having a hollow portion, and a second frame piece having a hollow portion adjacent to the first frame piece,
Having a connecting member for connecting the first and second frame pieces to each other by being inserted into the hollow portion of the first frame piece and the hollow portion of the second frame piece;
The first frame piece has a convex portion in the hollow portion,
The connecting member has a bent portion and a concave portion to be fitted with the convex portion,
A frame for a solar cell module, wherein at least the surface of the convex portion on the bent portion side is an inclined surface.

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