JP2013048232A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module that can be used in a snowy area and has a simple structure and excellent load resistance and reliability.
SOLUTION: A solar cell panel 1 having a first surface 1a and a second surface 1b located on the opposite side, and holding the periphery of the solar cell panel 1, and from the first surface 1a to the second surface A holding member 2 having a protruding portion 2b protruding in a direction toward 1b, and a reinforcing member that supports the solar cell panel 1 held by the protruding portion 2b of the holding member 2 on the second surface 1b side of the solar cell panel 1 The reinforcing member 3 has a long plate-like portion 3a that supports the solar cell panel 1 with the first side portion 3a1 in the short direction, and the plate-like portion. 3a is a solar cell module S in which the second side portion 3a2 located on the opposite side to the first side portion 3a1 is out of the space surrounded by the holding member 2.
[Selection] Figure 4

Description

  The present invention relates to a solar cell module.

  In recent years, solar cell modules have been installed in buildings such as houses and buildings in order to promote environmental protection and energy saving. Generally, a solar cell module is a state in which a plurality of solar cell elements are connected in series in order to increase the output voltage and output current to required values, and further to protect the solar cell elements of the power generation means over a long period of time. Packaging with.

  The solar cell module includes, for example, a solar cell panel packaged in a state where a plurality of solar cell elements are electrically connected, and a holding member that holds the peripheral edge of the solar cell panel. Recently, the solar cell module has been increased in size, which can reduce the material used per unit area, the number of manufacturing steps, and the transportation cost.

  However, if the size of the solar cell module is increased, the area of the light receiving surface is increased, so that the wind load and the snow load are greatly received, and breakage is likely to occur.

  For this reason, the solar cell module provided with the structure which supports the back surface side of a solar cell panel with a reinforcement member is proposed (for example, refer to the following patent documents 1).

JP 2009-57757 A

  The solar cell module is required to be installed in every region in the future, and it is possible to install it in a harsher environment. For example, when a large snow load in a snowy area or the like is taken into consideration, higher strength is required by the reinforcing member.

  However, if the material used for the holding member is increased or the number of holding members is increased, the amount of material used increases or the number of manufacturing steps increases. The effect of reducing manufacturing man-hours cannot be expected.

  Therefore, one of the objects of the present invention is to provide a solar cell module that can be used even in a snowy region and has a simple structure and excellent load resistance and reliability.

  A solar cell module according to the present invention holds a solar cell panel having a first surface and a second surface located on the opposite side, a peripheral edge of the solar cell panel, and the first surface from the first surface. A holding member having a protruding portion protruding in a direction toward the second surface, and a reinforcing member that supports the solar cell panel held by the protruding portion of the holding member on the second surface side of the solar cell panel And. Here, the reinforcing member has a long plate-like portion that supports the solar cell panel at the first side portion in the short direction, and the plate-like portion is opposite to the first side portion. The 2nd side part located in the side has come out of the space enclosed with the said holding member.

  According to the solar cell module described above, the second side portion of the plate-like portion of the reinforcing member is out of the space surrounded by the holding member, thereby effectively reducing the material used for the reinforcing member. The strength of the solar cell module can be increased.

  Thereby, it is possible to provide a solar cell module having a simple structure and excellent load resistance and reliability.

FIG. 1 is a diagram schematically illustrating one embodiment of a solar cell module according to the present invention, and is a cross-sectional view of a portion (D portion in FIG. 2) where a reinforcing member of the solar cell module is not provided. FIG. 2 is a diagram schematically illustrating an embodiment of the solar cell module according to the present invention, and is a plan view seen from the back side of the solar cell module. FIG. 3 is a diagram schematically illustrating one embodiment of a solar cell module according to the present invention, and illustrates how a reinforcing member is inserted into a holding member and fixed from the back side of the solar cell module. FIG. FIG. 4 is a diagram schematically illustrating one embodiment of a solar cell module according to the present invention, and is a cross-sectional view showing a state seen from the AA line direction in FIG. 2. FIG. 5 is a diagram schematically illustrating an embodiment of the solar cell module according to the present invention, and is a partial perspective view showing a state in which a reinforcing member is attached to a holding member. FIG. 6 is a diagram schematically illustrating an embodiment of the solar cell module according to the present invention, and is a partial cross-sectional view showing a state cut in the BB line direction in FIG. 2. FIG. 7 is a cross-sectional view schematically illustrating an example of a combination of solar cell modules when transporting a plurality of solar cell modules according to the present invention. FIG. 8 is a cross-sectional view schematically illustrating an example of a combination of solar cell modules when transporting a plurality of solar cell modules according to the present invention. FIG. 9 is a diagram schematically illustrating one embodiment of a solar cell module according to the present invention, and is a cross-sectional view showing a state cut in the direction of line CC in FIG. FIG. 10 is a perspective view schematically showing a state in which one embodiment of the solar cell module according to the present invention is attached to a gantry. FIG. 11 is a cross-sectional view schematically showing a state in which one embodiment of a solar cell module according to the present invention is attached to a gantry.

  Hereinafter, an example of an embodiment of a solar cell module according to the present invention will be described with reference to the drawings.

<Basic structure of solar cell module>
The basic structure of the solar cell module S will be described with reference to FIGS. As shown in FIG. 1, a solar cell module S includes a solar cell panel 1 having a first surface 1 a serving as a light receiving surface and a second surface 1 b serving as a back surface (non-light receiving surface) located on the opposite side thereof, At the periphery of the battery panel 1, a holding part 2a that holds the first side part 1c and the second side part 1d that are not on the same plane, and a protrusion in the direction from the first face 1a to the second face 1b of the solar battery panel 1 And a holding member 2 having a protruding portion 2b.

The holding member 2 only needs to have a structure that holds at least the first side portion 1c and the second side portion 1d that are not coplanar with each other. As shown in FIG. It does not have to be. For example, as shown in FIG. 2, the holding member 2 includes at least a pair of first holding member 2A and second holding member 2B. The holding member 2 holds two side portions of the solar cell panel 1 that are not on the same side surface.

  The solar cell panel 1 includes a plurality of solar cell elements electrically connected to each other by a translucent substrate 5, an upper filler 7, and an inner lead 9 in order from the first surface 1a side to the second surface 1b side. 6, a lower filler 7 and a back surface protective film 8 are disposed.

  As shown in FIG. 4, the solar cell module S further includes a reinforcing member 3 that supports the second surface 1 b side of the solar cell panel 1. The reinforcing member 3 has a plate-like portion 3 a in which both end portions in the longitudinal direction are in contact with the protruding portion 2 b of the holding member 2, and the plate-like portion 3 a is more solar than the protruding portion 2 b of the holding member 2. The battery panel 1 is long in the direction from the first surface 1a to the second surface 1b. That is, the plate-like portion 3 a is out of the space surrounded by the holding member 2 at the second side portion 3 a 2 located on the opposite side to the first side portion 3 a 1.

  The reinforcing member 3 is formed of a long plate-like body as a whole, and is disposed, for example, so as to be bridged between the first holding member 2A and the second holding member 2B facing each other. Then, the connecting portion 3d located at one end in the longitudinal direction of the reinforcing member 3 is connected to one first holding member 2A, and the connecting portion 3d located at the other end is opposed to the other second holding member. It is connected to the member 2B.

  Here, as shown in FIGS. 2 and 3, the plate-like portion 3 a of the reinforcing member 3 has a side facing the solar cell panel 1 (first side portion 3 a 1) and an opposite side (second side portion 3 a 2). Each has a first bent portion 3b and a second bent portion 3c which are bent in opposite directions so that the main surface is parallel to the second surface 1b of the solar cell panel 1. Also good. In this manner, the strength against torsional deformation that attempts to deform the reinforcing member 3 clockwise and counterclockwise can be increased by being bent in opposite directions in the short direction of the plate-like portion 3a. .

  The reinforcing member 3 has a first bent portion and a second bent portion that are bent in the same direction on the solar cell panel 1 side and the opposite side of the plate-like portion 3a. Also good.

<Specific structure of solar cell module>
Next, a specific structure of the solar cell module will be described.

  As shown in FIG. 1, the translucent board | substrate 5 functions as a main board | substrate of the solar cell panel 1, For example, material with high light transmittances, such as glass or polycarbonate resin, can be used.

  For example, the pair of fillers 7 have a function of sealing the solar cell element 6, and for example, a thermosetting resin such as ethylene-vinyl acetate copolymer (EVA) can be used.

  The plurality of solar cell elements 6 are protected by the filler 7 around the periphery, and the adjacent solar cell elements 6 are electrically connected to each other through the inner leads 9. The back surface protective film 8 has a function of protecting the back surface. For example, polyvinyl fluoride (PVF), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or a resin in which two or more of these are laminated Can be used.

The 2nd surface 1b side of the solar cell panel 1 is formed with the material in which the filler 7 located between the back surface protective film 8 and the solar cell element 6 and the back surface protective film 8 has translucency, for example. Thus, a mode in which a part of light incident from the non-light receiving surface side is received may be adopted.

As the solar cell element 6, for example, a flat silicon substrate made of single crystal silicon or polycrystalline silicon is used. When such a silicon substrate is used, adjacent silicon substrates are electrically connected by the inner leads 9 as described above. The solar cell element 6 includes, for example, a thin film solar cell, a chalcopyrite solar cell (for example, CIGS (Cu (In, Ga) Se ₂ ), CISS (Cu (In, Ga) (Se)) other than silicon. , S) ₂ and CIS (CuInS ₂ ), etc.), CdTe solar cells, solar cells in which a thin film amorphous is formed on a crystalline silicon substrate, or the like may be used. An example using a polycrystalline silicon substrate as 6 will be described.

  As shown in FIG. 4, each of the pair of holding members 2 has a holding portion 2 a into which the solar cell panel 1 is fitted, and the holding portion 2 a is a protrusion perpendicular to the main surface of the solar cell panel 1. 2b and a mounting portion 2c that is a plate-like portion protruding from the protruding portion 2b toward the space surrounded by the holding member 2.

  Moreover, as shown in FIG. 3, the slit 2d which inserts the connection part 3d provided in the both ends of the reinforcement member 3 is provided in the center part of the longitudinal direction of the attaching part 2c of the holding member 2. As shown in FIG.

  The holding member 2 can be easily manufactured by a method such as extrusion molding of aluminum or roll forming of a steel plate.

  In addition, in this embodiment, although the holding member 2 is a frame-shaped body which hold | maintains the side part of the perimeter of the solar cell panel 1, it is not restricted to this. Since the holding member 2 only needs to hold the solar cell panel 1, it may be a pair of rod-like bodies that hold at least a pair of side portions of the solar cell panel 1 that are not coplanar with each other.

  The reinforcing member 3 has a function of improving load bearing performance with respect to the solar cell panel 1. As shown in FIG. 2, the entire reinforcing member 3 is long, and is laid between the first holding member 2 </ b> A and the second holding member 2 </ b> B facing each other on the non-light-receiving surface side of the solar cell panel 1. Yes.

  For example, the reinforcing member 3 may have a Z-shaped cross-sectional structure as shown in FIG. More specifically, the reinforcing member 3 has a long plate-like portion 3a that supports the solar cell panel 1 with the first side portion 3a1 in the short direction, and the plate-like portion 3a is a first side portion. The second side portion 3a2 located on the opposite side to 3a1 is out of the space surrounded by the holding member 2 and is a flat plate-like first bent portion 3b located on the solar cell panel 1 side. And a second bent portion 3c at a position opposite to the first bent portion 3b.

  Here, the first bent portion 3b is a portion that holds the non-light-receiving surface of the solar cell panel 1, and maintains the rigidity of the reinforcing member 3 in the remaining portion of the plate-like portion 3a including the second bent portion 3c. The reinforcing member 3 has a connecting portion 3d formed by cutting out both end portions in the longitudinal direction. More specifically, the connecting portion 3d is notched so as not to interfere with the holding portion 2a of the holding member 2 when the solar cell module S is configured, and at the position of the mounting portion 2c of the holding member 2, It is cut away so as not to protrude toward the non-light-receiving surface side of the solar cell panel 1 from the mounting portion 2c.

Such a reinforcing member 3 can be manufactured, for example, by extruding aluminum or roll forming a steel plate. The reinforcing member 3 can be made of, for example, a Z-shaped steel or a groove-shaped steel, and a required strength is obtained by increasing its height (web), and the reinforcing member 3 is applied to the surface of the flange portion, that is, the solar cell panel 1 side. It is desirable to make the contact surface as small as possible.

<Method of attaching reinforcing member 3>
Next, a method for attaching the reinforcing member 3 to the solar cell module S will be described.

  As shown in FIG. 3, the reinforcing member 3 is in a space surrounded by the holding member 2 on the second surface 1 b side of the solar panel 1, and the longitudinal direction of the reinforcing member 3 is parallel to the short direction of the solar cell module S. It is fixed to become. At that time, for example, as shown in FIG. 5, slits 2 d (notches) provided in the attachment portion 2 c of the holding member 2 are provided so as to correspond to both ends of the reinforcing member 3, and are formed in a convex shape, for example. The reinforcing connecting member 3 and the holding member 2 are simply fitted to each other by guiding the connecting portion 3d, and the reinforcing member 3 is inserted into the space sandwiched between the holding members 2 and fixed. The relationship between the slit 3d of the holding member 2 and the connecting portion 3d of the reinforcing member 3 may be opposite to the relationship shown in FIG. In other words, a configuration may be adopted in which a slit is formed on the reinforcing member 3 side and the holding member 2 is inserted into the slit without processing the holding member 2 side.

  Thereafter, as shown in FIG. 6, the reinforcing member 3 is fixed from the side surface side of the holding member 2 with screws 11. At this time, the elastic member 12 may be interposed between the second surface 1b of the solar cell panel 1 and the plate-like portion of the reinforcing member 3. For example, the reinforcing member 3 is adhesively fixed to the second surface 1b of the solar cell panel 1 by the elastic member 12 although it is an adhesive, for example. That is, as shown in FIGS. 5 and 6, in the reinforcing member 3, a plate-like first bent portion 3 b that is located on the solar cell panel 1 side and is bent in parallel with the second surface 1 b of the solar cell panel 1. The reinforcing member 3 may be fixed to the solar cell panel 1 with an elastic member 12 as an adhesive interposed between the solar cell panel 1 and the second surface 1b of the solar cell panel 1.

  When the elastic member 12 is interposed between the solar cell panel 1 and the reinforcing member 3, for example, an adhesive is applied to the reinforcing member 3. The adhesive can be applied in advance before the reinforcing member 3 is inserted into the holding member 2 or the like, but can also be applied after fixing with the screw 11. As the adhesive, for example, a silicon-based adhesive, a urethane resin-based adhesive, or an epoxy resin-based adhesive can be used.

<Combination structure of multiple solar cell modules>
Next, a preferred combination structure when transporting a plurality of solar cell modules will be described. For the sake of simplicity, the structure when transporting the two solar cell modules in combination will be described.

  For example, as shown in FIG. 7, the solar cell modules S may be combined so that the two solar cell modules S <b> 1 and S <b> 2 are turned upside down and the plate-like portions 3 a provided to each other are rubbed together. Thereby, even if the reinforcing member 3 protrudes from the space surrounded by the holding member 2, the volume occupied by the pair of solar cell modules S has only the capacity of the space surrounded by the normal holding member 2. Since there is no big difference compared with the module S, suitable transportation can be realized.

  Moreover, since the plate-like portions 3a in the reinforcing member 3 are packaged together as described above, the mutual vibration of the solar cell modules can be suppressed, so that damage in the packaging can be reduced.

  Furthermore, as shown in FIG. 8, when the plate-like portion 3a is made as long as possible and the first bent portion 3b and the second bent portion 3c are combined, the vibration in the vertical direction of the solar cell module is increased. Can be suppressed, and a greater effect can be expected.

  In addition, the solar cell module which concerns on this invention is not limited to the form mentioned above. For example, it is optimal if the solar cell panel 1 can be sufficiently reinforced with only one reinforcing member 3, but a plurality of reinforcing members 3 can be provided at predetermined locations on the second surface 1 b side of the solar cell panel 1. Further, by arranging a plurality of symmetrical positions including the central position in the CC line in FIG. 2, the back surface of the solar cell panel 1 can be sufficiently reinforced, and the solar cell modules can be connected during transportation. This is preferable because the deviation can be reduced and the solar cell module can be transported firmly.

<Operational effects of this embodiment>
Below, the effect of this embodiment mentioned above is demonstrated.

  While the reinforcing member 3 of the solar cell module S has the plate-like portion 3a and the second bent portion 3c that have come out of the space surrounded by the holding member 2, the material used for the reinforcing member can be saved. The strength can be effectively increased.

More specifically, the magnitude of the deformation resistance to bending of a member that can be compared to a beam like the reinforcing member 3 is called a cross-sectional secondary moment I _x . This cross-sectional secondary moment I _x is expressed by a value obtained by integrating the square of the distance y from the neutral axis over the entire area A. This can be expressed by the following equation.

For example, (the dimensions of the bending direction perpendicular to the direction b, the bending dimension h in the direction parallel to the direction) rectangular section second moment _{I x} of _a I x = ^bh 3/12. If it demonstrates with the reinforcement member 3, h will respond | correspond to the dimension of the direction which goes to the 2nd surface 1b from the 1st surface 1a in the solar cell panel 1 of the plate-shaped part 3a. The plate-like portion 3a of the reinforcing member 3 is configured to go out of the space surrounded by the holding member 2, and as described above, the sectional moment is proportional to the cube of the dimension of the plate-like portion 3a. And get bigger.

  Therefore, with the configuration of the present embodiment, the strength can be significantly increased with a simple structure while saving raw materials. Further, by increasing the deformation resistance of the reinforcing member 3 and increasing the strength against bending, the bending of the solar cell panel 1 when a snow load or the like is applied with a small number is reduced, and the bending is caused in the solar cell element 6. The crack which arises can be suppressed.

  Further, as shown in FIG. 9, the plate-like portion 3a is made larger than the conventional reinforcing member, and the flat area facing the solar cell panel 1 side of the first bent portion 3b has the same strength as the conventional one. The area is half that of the reinforcing plate. For this reason, while maintaining the rigidity of the reinforcing member 3 itself, the contact portion of the reinforcing member 3 with the solar cell panel 1 is suppressed to about half the area, and cracks in the solar cell element 6 and the translucent substrate 5 are reduced. It is possible to minimize the generation range and the occurrence of delamination between the solar cell element 6 and the inner lead.

For example, as shown in FIG. 10, the solar cell module S is used as a solar cell array attached to a gantry provided with a horizontal beam 22 and a vertical beam 23 on the arrangement surface P. In the present embodiment, as shown in FIG. 11, the portion located outside the space surrounded by the holding member 2 of the reinforcing member 3 is set so as to avoid interference with the horizontal rail 22 of the gantry, The dimension of the plate-like portion 3a of the reinforcing member 3 in the direction orthogonal to the main surface of the solar cell panel 1 is set so that the second bent portion 3b of the reinforcing member 3 contacts the arrangement surface P. By providing such a reinforcing member 3, the solar cell panel 1 is supported by the reinforcing member 3 and the arrangement surface P via the reinforcing member 3, and the bending of the solar cell panel 1 is further reduced. Damage to the translucent panel 5 and the solar cell element 6 of S can be efficiently suppressed.

1: Solar cell panel 1a: 1st surface 1b: 2nd surface 1c: 1st side part 1d: 2nd side part 2: Holding member 2A: 1st holding member 2B: 2nd holding member 2a: Holding part 2b: Protrusion Part 2c: Mounting part 2d: Slit 3: Reinforcing member 3a: Plate-like part 3a1: First side part 3a2: Second side part 3b: First bent part 3c: Second bent part 3d: Connection part 5: Translucent Panel 6: Solar cell element 7: Filler 8: Back surface protective film 9: Inner lead 11: Screw 12: Elastic member 22: Mounting frame (horizontal cross)
23: Mount (vertical crossing)
S, S1, S2: Solar cell module P: Installation surface

Claims (5)

A solar cell panel having a first surface and a second surface located on the opposite side;
A holding member that holds the periphery of the solar cell panel and has a protruding portion that protrudes in a direction from the first surface toward the second surface;
A solar cell module comprising a reinforcing member that supports the solar cell panel, held by the protruding portion of the holding member on the second surface side of the solar cell panel,
The reinforcing member has a long plate-like portion that supports the solar cell panel with a first side portion in a short direction, and the plate-like portion is located on the opposite side to the first side portion. The solar cell module in which the 2nd side part which is doing has come out of the space enclosed with the said holding member.   2. The sun according to claim 1, wherein each of the first side portion and the second side portion of the plate-like portion of the reinforcing member is bent in parallel to the second surface of the solar cell panel. Battery module.   3. The solar cell module according to claim 2, wherein each of the first side portion and the second side portion of the plate-like portion of the reinforcing member is bent in opposite directions.   The solar cell module according to any one of claims 1 to 3, wherein an elastic member is interposed between the second surface of the solar cell panel and the plate-like portion of the reinforcing member.   The solar cell module according to claim 4, wherein the elastic member is an adhesive.

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