JP5709715B2 - Solar cell module and solar cell array using the same - Google Patents

Description

  The present invention relates to a solar cell module and a solar cell array using the solar cell module.

  A solar cell module is distorted when a snow load or wind pressure load is applied, and this strain may cause cracks in the solar cell element in the solar cell module or separation at the electrical connection between the solar cell element and the inner lead. There is. For this reason, a solar cell module having a structure with high strength against a load is demanded. Therefore, as a solar cell module having an increased strength, a solar cell module that is a rectangular solar cell module and in which an auxiliary frame is installed between frames on the back side thereof has been proposed. (See, for example, Patent Document 1 below).

  On the other hand, the solar cell module is required to improve the power generation capacity on the installation surface by increasing the filling rate on the installation surface of various shapes such as the roof surface. Therefore, a solar cell module having an inclined portion along the oblique side of the roof surface has been proposed as a solar cell module that can be installed on a trapezoidal or triangular roof surface with a high filling rate. (For example, see Patent Document 2 below)

JP 2004-6625 A JP 2002-76422 A

  The rectangular solar cell module disclosed in Patent Document 1 has a shape that is line-symmetric with respect to the center line. Therefore, when a load is applied, the stress is distributed symmetrically with respect to the center line as viewed from the light receiving surface side, and the displacement of the solar cell module is maximized at the intersection of the center lines. At this time, as disclosed in Patent Document 1, by arranging the auxiliary frame so as to pass through the intersection point in parallel with one side of the solar cell module, the distortion of the solar cell module could be reduced.

  However, the solar cell module having the inclined portion as shown in Patent Document 2 has a small fixed portion with respect to the installation surface and asymmetrically distributed strain as compared with the rectangular solar cell module. For this reason, it is required to increase the strength and efficiently reduce the distortion of the solar cell module.

  Accordingly, an object of the present invention is to provide a solar cell module having an inclined portion, which has high strength and efficiently reduces strain.

A solar cell module according to an embodiment of the present invention includes a pentagonal solar cell panel having a hypotenuse obtained by cutting off one corner of a rectangle when viewed in plan, and a frame disposed on the outer periphery of the solar cell panel. And an auxiliary frame disposed on the back side of the solar cell panel and provided across the frame, the frame being fixed to the installation surface and positioned substantially parallel and having two different lengths The two fixing parts are a first fixing part, a facing part that is longer than the first fixing part and faces the first fixing part, and a non-facing part that does not face the first fixing part. A second fixing portion having a portion, and when the auxiliary frame is viewed from the back side of the solar cell panel, one end is connected to the non-facing portion of the second fixing portion, and the center portion is On the back side The second end other than the first region sandwiched between the first fixing portion and the opposing portion of the second fixing portion is disposed so that the other end is inclined toward the first region. The frame includes a first frame portion having the first fixing portion and a second frame portion having the second fixing portion, wherein the first frame portion is the first frame portion. A parallel part having a fixing part, and being connected to the parallel part and inclined with respect to the second fixing part of the second frame portion at the oblique side of the solar cell panel when viewed from the back side. When viewed from the back side, the inclination angle θ1 of the auxiliary frame with respect to the second fixing portion is larger than the inclination angle θ2 of the inclination portion with respect to the second fixing portion. .

  According to the solar cell module described above, in the solar cell module having two fixing portions that are located substantially in parallel and have different lengths, it is possible to efficiently reduce the strain distributed asymmetrically on the solar cell panel. Thereby, the crack of the solar cell element in a solar cell panel and peeling of the electrical connection part between a solar cell element and an inner lead can be reduced, and it can be set as a solar cell module with high intensity | strength with respect to a load.

It is a figure which shows the solar cell module which concerns on 1st Embodiment of this invention, (a) shows the top view which looked at the solar cell module from the light-receiving surface side, (b) shows the solar cell module of Fig.1 (a). FIG. 3C is a cross-sectional view taken along the line AA ′ in FIG. 1A, and FIG. 1D is a cross-sectional view taken along the line BB ′ in FIG. (E) shows a cross-sectional view taken along line CC ′ of FIG. It is a figure which shows the solar cell panel of the solar cell module which concerns on the 1st Embodiment of this invention, (a) shows the top view which looked at the solar cell panel from the light-receiving surface side, (b) shows FIG. ) Is a plan view seen from the back side, and (c) is a cross-sectional view taken along the line DD ′ of FIG. The solar cell array which installs the solar cell module which concerns on the 1st Embodiment of this invention on a mount frame is shown, (a) shows the perspective view of a solar cell array, (b) shows E of Fig.3 (a). Sectional drawing in the -E 'line is shown, (c) is a partially enlarged view of the F portion of FIG. 3 (b). It is a model figure which shows a mode when a load is added to the solar cell module which concerns on the 1st Embodiment of this invention. It is drawing which shows about the simulation result when installing the solar cell module which does not use this invention as a comparative example (comparative example 1), and the solar cell module of this comparative example 1 on a mount frame, and applying a positive pressure load, (a) Shows a plan view of the solar cell module (Comparative Example 1) viewed from the back side, and (b) shows the simulation results. It is drawing which shows about the simulation result when installing the solar cell module which does not use this invention as a comparative example (comparative example 2), and the solar cell module of this comparative example 2 on a mount frame, and applying a positive pressure load, (a) Shows a plan view of the solar cell module (Comparative Example 2) viewed from the back side, and (b) shows the simulation results. It is drawing which shows the simulation result when installing the solar cell module which concerns on the 1st Embodiment of this invention in a mount frame, and applying a positive pressure load. It is drawing which shows the solar cell module which concerns on the 2nd Embodiment of this invention, (a) is the top view which looked at the solar cell module from the back side, (b) is the solar cell module of Fig.8 (a). It is drawing which shows the simulation result when installing in a mount and applying a load.

  Hereinafter, embodiments of a solar cell module and a solar cell array according to the present invention will be described with reference to the drawings.

(First embodiment)
<Solar cell module>
The solar cell module 1 according to the first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

As shown to Fig.1 (a) and FIG.1 (b), the solar cell module 1 is the solar cell panel 2, the flame | frame arrange | positioned in the outer peripheral part of the solar cell panel 2, and the solar cell panel 2 from the back surface side. And an auxiliary frame 16 to be supported. The frame holds the solar cell panel 2 and includes a first frame (upper side) 12, a second frame (lower side) 11, a third frame (right side) 13, a fourth frame (left side) 14, and a fifth frame ( (Slanted side) 15. Hereinafter, the first frame (upper side) 12 and the fifth frame (slope side) 15 may be collectively referred to as a first frame portion, and the second frame (lower side) 11 may also be referred to as a second frame portion. The first frame (upper side) 12 and the fifth frame (slope side) 15 that are the first frame portions are also referred to as a parallel portion and an inclined portion, respectively.

  Among these frames, the second frame (lower side) 11 and the first frame (upper side) 12 are fixed to the installation surface, and the third frame (right side) 13, the fourth frame (left side) 14, and the fifth frame ( The oblique side 15 is not fixed to the installation surface.

  First, the solar cell panel 2 used for the solar cell module 1 according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 2, the solar cell panel 2 has a pentagonal shape in plan view, specifically, a pentagonal shape having a hypotenuse 2g obtained by cutting off one corner of the rectangle. In the following, when the solar cell panel 2 is arranged as shown in FIG. 2B, the lower side is the lower side 2c, the upper side is the upper side 2d, the right side is the right side 2e, and the left side is The located side is called the left side 2f, and the aforementioned hypotenuse is called the hypotenuse 2g.

  The solar cell panel 2 includes, in order from the light receiving surface 2a side, a translucent substrate 3 that also serves as a substrate, a pair of fillers 4 made of a thermosetting resin, and a pair of fillers 4 that are protected by the inner leads 5 from each other. A plurality of solar cell elements 6 that are electrically connected to each other, a back surface protective material 7 that protects the back surface, and a terminal box 8 that is bonded to the back surface protective material 7 and outputs the output to the outside.

  The solar cell panel 2 has a light receiving surface 2a that mainly receives light and a non-light receiving surface 2b corresponding to the back surface of the light receiving surface 2a. In the present embodiment, the light receiving surface 2 a is one main surface of the translucent substrate 3, and the non-light receiving surface 2 b is one main surface of the back surface protective material 7. The non-light-receiving surface 2b does not receive light at all. For example, the back surface protective material 7 and the filler 4 positioned between the solar cell element 6 and the back surface protective material 7 are formed of a material having translucency. Thus, it may be configured to receive a part of light incident from the non-light-receiving surface 2b side.

  The translucent substrate 3 functions as a substrate of the solar cell module 1 and is made of a material having a high light transmittance, such as glass or polycarbonate resin.

  The pair of fillers 4 has a function of sealing the solar cell element 6 and is made of, for example, a thermosetting resin.

The plurality of solar cell elements 6 are protected by a pair of fillers 4 and are electrically connected to each other by inner leads 5. As the solar cell element 6, for example, a flat plate 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 5. 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, S) ₂ ), and CIS (including CuInS ₂ )), CdTe solar cells, solar cells in which a thin film amorphous is formed on a crystalline silicon substrate, or the like may be used.

The back surface protective material 7 has a function of protecting the back surface of the solar cell module 1, for example, glass or polycarbonate resin, polyvinyl fluoride (PVF), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or It consists of resin which laminated | stacked these 2 or more types.

The terminal box 8 is bonded to the back surface protective material 7 and has a function of extracting output power obtained from the plurality of solar cell elements 6 to the outside.
As described above, the solar cell module 1 includes the solar cell panel 2, the frame, and the auxiliary frame 16.

  As shown in FIG. 1, in the solar cell module 1, the lower side 2c of the solar cell panel 2 is protected by the second frame (lower side) 11, the upper side 2d is protected by the first frame (upper side) 12, and the right side 2e is protected by the second side. Three frames (right side) 13 protect, left side 2 f is protected by fourth frame (left side) 14, and hypotenuse 2 g is protected by fifth frame (slope side) 15. The non-light-receiving surface 2b of the solar cell panel 2 is supported by an auxiliary frame 16 provided between the second frame (lower side) 11 and the first frame (upper side) 12. For example, the first to fifth frames are fixed to each other by screws at their contact portions.

  As shown in FIG. 1 (c) and FIG. 1 (d), the second frame (lower side) 11 and the first frame (upper side) 12 are respectively fitted with the solar cell panel 2 in a cross section orthogonal to the longitudinal direction. It has a fitting groove 17 that can be made. Similarly, the third frame (right side) 13, the fourth frame (left side) 14, and the fifth frame (slope side) 15 are also provided with fitting grooves 17. When the solar cell panel 2 is fitted in the fitting groove 17 of each frame, the solar panel 2 is fixed and protected to each frame.

  On the other hand, as shown in FIG. 1 (e), the auxiliary frame 16 has a substantially H-shape when viewed from a cross section orthogonal to the longitudinal direction.

  In addition, as shown in FIG. 1B, the second frame (lower side) 11 is longer than the first frame (upper side) 12. As described above, the first frame (upper side) 12 and the second frame (lower side) 11 are frames fixed to the installation surface, and are fixed over the entire length, so that the fixing portions having different lengths from each other. have. Specifically, the first frame (upper side) 12 has a first fixing portion 41 fixed to the installation surface, and the second frame (lower side) 11 is fixed to the installation surface and the second The second fixing portion 42 is longer than the first fixing portion 41. In the present embodiment, since both the first frame 12 and the second frame (lower side) 11 are fixed to the installation surface over the entire length, the first fixing portion 41 is the first frame (upper side) 12 itself. The second fixing portion 42 is the second frame (lower side) 11 itself. The second fixing portion 42 includes a facing portion 11 a that faces the first fixing portion 41 and a non-facing portion 11 b that does not face the first fixing portion 41. In the present embodiment, the second fixing portion 42, that is, the second frame (lower side) 11 has one opposing portion 11a and a non-facing portion 11b.

  Hereinafter, in the second frame (lower side) 11, a portion facing the first frame (upper side) 12 is referred to as a facing portion 11a, and a portion not facing the first frame (upper side) 12 is referred to as a non-facing portion 11b. At this time, a region sandwiched between the first fixed portion 41 and the facing portion 11a of the second fixed portion 42 on the back surface of the solar cell panel 2 is defined as a first region R1, and a region other than the first region R1 is defined as a second region. Region R2.

Of the non-facing portion 11b, the end portion close to the facing portion 11a is called a first end portion 11c, and the end portion away from the facing portion 11a is called a second end portion 11d. Of the fifth frame (slanted side) 15, the part that contacts the first frame (upper side) 12 is called a third end 15 a, and the part that contacts the fourth frame (left side) 14 is the fourth end 15 b. Call. Furthermore, one end of the auxiliary frame 16 in contact with the second frame (lower side) 11 is referred to as a first contact portion (lower) 16a, and the other end of the auxiliary frame 16 is referred to as a second contact portion (upper) 16b.
In the present embodiment, one end (first contact portion 16a) of the auxiliary frame 16 is connected to the non-fixed portion 11b of the second frame (lower side) 11 (second fixed portion 42). And the auxiliary member 16 is arrange | positioned so that the other end (2nd contact part 16b) of the auxiliary | assistant frame 16 may incline toward 1st area | region R1, and the auxiliary | assistant frame 16 is 2nd contact part ( The upper frame 16b contacts the first frame (upper side) 12. Specifically, the other end (second contact portion (upper) 16b) of the auxiliary frame 16 is first connected at the connection position closer to the first region R1 than the connection position of the one end to the second fixing portion 42. It is connected to the fixed part 41. The center portion of the auxiliary frame 16 passes through the second region R2. Here, the central portion refers to, for example, a portion other than the end portion connected to the frame. In the present invention, at least a portion of the central portion may substantially pass through the second region R2. .

  More specifically, in the present embodiment, the first contact portion (lower) 16 a of the auxiliary frame 16 is located in the non-facing portion 11 b of the second frame (lower side) 11. The second contact portion (upper) 16 b of the auxiliary frame 16 is located on the first frame (upper) 12.

Furthermore, in this embodiment, the angle formed by the second fixing portion 42 (second frame (lower side) 11) and the auxiliary frame 16 is an angle θ1, and the second fixing portion 42 (second frame (lower side) 11) and the second When the angle formed by the five frames (the hypotenuse) 15 is the angle θ2, θ1 and θ2 have the following relationship. Here, the angle θ2 is also referred to as an angle formed by the second fixed portion 42 and the inclined portion.
0 <θ2 <θ1 <90 °
The first frame (upper side) 12, the second frame (lower side) 11, the third frame (right side) 13, the fourth frame (left side) 14, the fifth frame (slope side) 15 and the auxiliary frame 16 described above are made of, for example, aluminum. Can be produced by extruding or rolling a steel plate.

  The auxiliary frame 16 has a cross-sectional shape other than the H shape shown in FIG. 1E, for example, an I shape, a T shape, an L shape, a triangular shape, a square tube, a round tube shape, or the like. It is good to select suitably according to.

<Solar cell array>
Hereinafter, the solar cell array 20 using the solar cell module 1 according to the above-described first embodiment will be described in detail.
As shown in FIG. 3, the solar cell array 20 according to the present embodiment includes a plurality of solar cell modules 1 and a gantry (fixing member) 21 that fixes the frame of the solar cell module 1 to the installation surface. . Specifically, in the solar cell array 20, a plurality of solar cell modules 1 are supported on the mount 21 and fixed to the installation surface.

  At this time, the first frame (upper side) 12 and the second frame (lower side) 11 are arranged along a direction perpendicular to the flow direction of the roof, respectively, and the third frame (right side) 13 and the fourth frame ( The left side 14 is arranged along the so-called roof flow direction.

As described above, in this embodiment, as shown in FIG. 3, the gantry 21 supports the second frame (lower side) 11 and the first frame (upper side) 12 of the solar cell module 1. That is, the second frame (lower side) 11 and the first frame (upper side) 12 are frames fixed to the installation surface. At this time, the fourth frame (left side) 14 and the fifth frame (slanted side) 15 are only a frame of one end on the side joined to the second frame (lower side) 11 and the first frame (upper side). Although supported, other parts are not supported by the gantry.

  As described above, in the solar cell module 1 according to the present embodiment, when viewed from the back side, the auxiliary frame 16 has one end connected to the non-facing portion 11b of the second fixing portion 42 and the center portion in the second region R2. And the other end is inclined toward the first region. As a result, in the solar cell module 1 having two fixed portions that are positioned substantially in parallel and have different lengths, the second region R2 corresponding to the non-facing portion 11b that is not uniformly distributed and is likely to be distorted. Thus, the reinforcing frame 16 is disposed. As a result, distortion can be reduced efficiently.

  More specifically, in the vicinity of the corner 2h formed by the left side 2f and the hypotenuse 2g of the solar cell panel 2, the shape changes discontinuously, so that when an external force such as a snow load or a wind pressure load is applied, the stress Is not uniformly distributed. The second frame (lower side) 11 and the first frame (upper side) 12 are supported by the gantry 21, while the fourth frame (left side) 14 and the fifth frame (slanted side) 15 are gantry 21. It is not supported by. From this, as shown in FIG. 4, when a load is applied, the displacement of the fifth frame (slope side) 15 increases in proportion to the distance from the third end 15a, and when a positive pressure load is applied, Five frames (slanted sides) 15 are displaced downward. For this reason, there is a tendency that the distortion tends to be the largest near the corner portion 2h.

  Here, as shown in FIG. 1B, in the solar cell module 1 according to the present embodiment, the auxiliary frame 16 is connected to the second frame (lower side) so as to run parallel to the fifth frame (slope side) 15. 11 and the first frame (upper side) 12. Thereby, distortion can be reduced efficiently.

  The mechanism for reducing strain will be described in more detail below.

  Since the second frame (lower side) 11 and the first frame (upper side) 12 are supported by the gantry 21, displacement occurs compared to the fourth frame (left side) 14 and the fifth frame (slope side) 15. Hateful. In the present embodiment, since the auxiliary frame 16 is installed between the second frame (lower side) 11 and the first frame (upper side) 12 supported by the gantry 21, the auxiliary frame 16 is similarly displaced. Hateful.

  Further, the auxiliary frame 16 is arranged in parallel with the fifth frame (slope side) 15 so as to satisfy the relationship of 0 <θ1 <θ2 <90 ° as described above. From this, the auxiliary frame 16 can keep the distance between the fulcrum points of the solar cell panel 2 supported by the fourth frame (left side) 14 and the fifth frame (slope side) 15 small. Thereby, the distortion of the solar cell panel 2 can be further reduced.

  Further, as will be described later using simulation results, the distortion of the solar cell panel 2 tends to increase near the corner portion 2h. In the present embodiment, as described above, the auxiliary frame 16 passes through the second region R2 and supports the vicinity of the corner portion 2h of the solar cell panel 2. Thereby, the distortion of the solar cell panel 2 can be further reduced.

  The second contact portion (upper) 16b of the auxiliary frame 16 may be positioned closer to the third end 15a than the midpoint of the first frame (upper side) 11, as shown in FIG. Good. Thereby, it can be made smaller than the distance between fulcrums, and the distortion of the corner part 2h can be reduced.

  About the distortion reduction effect of the solar cell module 1 which concerns on this embodiment mentioned above below, using the simulation result of the solar cell module 1 at the time of giving a positive pressure load, and the simulation result of the solar cell module of a comparative example explain.

  Here, the simulation was performed using two solar cell modules as the solar cell module of the comparative example. First, each structure of the solar cell module 30 (comparative example 1) and the solar cell module 31 (comparative example 2) of a comparative example and the simulation result about each solar cell module are demonstrated.

  As shown in FIG. 5A, the solar cell module 30 (Comparative Example 1) has a second frame (lower side) 11, a first frame (upper side) 12, and a third frame (right side) on the outer periphery of the solar cell panel 2. 13, only the fourth frame (left side) 14 and the fifth frame (slope side) 15 are provided, and the auxiliary frame 16 is not provided.

  On the other hand, as shown in FIG. 6A, the solar cell module 31 (Comparative Example 2) has a first frame (upper side) 12, a second frame (lower side) 11, and a third frame ( A right side) 13, a fourth frame (left side) 14, and a fifth frame (slope side) 15 are provided. An auxiliary frame 16 is provided between the first frame (lower side) 11 and the second frame (upper side) 12 and is arranged so as to be orthogonal to the first frame (lower side) 11 when viewed in plan. Yes.

  The solar cell module 1, the solar cell module 30 (Comparative Example 1), and the solar cell module 31 (Comparative Example 2) are provided with the presence or absence of the auxiliary frame 16 and the arrangement of the auxiliary frame 16 such as the outer shape and the material and dimensions of each member. All other configurations other than the position are the same.

  First, a simulation result when a positive pressure load is applied to the solar cell module 30 (Comparative Example 1) will be described. FIG. 5B is a diagram showing a strain distribution. Similarly, FIG. 5B, FIG. 7 and FIG. 8B, which will be described later, are simulation results in each corresponding solar cell module, and are diagrams showing strain distribution.

  As shown in FIG. 5B, it can be seen that in the solar cell module 30 (Comparative Example 1), a large strain is generated in the vicinity of the corner portion 2 h of the solar cell panel 2. The maximum value of strain was about 700 μm. As described above with reference to FIG. 4, this is considered to be because the deflection of the fifth frame (slope side) 15 increases in proportion to the distance from the third end 15a.

  Next, a simulation result when a positive pressure load is applied to the solar cell module 31 (Comparative Example 2) will be described.

  As shown in FIG. 6A, in the solar cell module 31 (Comparative Example 2), the second frame (lower side) is between the middle point of the fifth frame (slope side) 15 and the second frame (lower side) 11. ) An auxiliary frame 16 is provided so as to be orthogonal to 11.

  In such a solar cell module 31 (Comparative Example 2), as shown in FIG. 6B, although the distortion is reduced as compared with the solar cell module 30 (Comparative Example 1), the fifth frame ( It can be seen that a large strain is generated in the vicinity of the joint between the oblique side 15 and the auxiliary frame 16. In Comparative Example 2, the maximum strain value was about 350 μm. This is because the second abutting portion 16b is separated from the third end portion 15a, so that when a positive pressure load is applied, the second abutting portion 16b is displaced downward together with the fifth frame (slanted side) 15 and the second contact portion 16b is displaced. It is considered that bending occurs in the vicinity of the contact portion 16b and the strain cannot be sufficiently reduced.

As described above, since the solar cell module 30 (Comparative Example 1) and the solar cell module 31 (Comparative Example 2) have a large maximum strain, the solar cell element 6 is cracked or the solar cell element 6 and the inner lead 5 are electrically connected. It has been found that there is a high possibility that the peeling of the connecting portion will occur.

  Next, the simulation result of the solar cell module 1 according to the first embodiment of the present invention will be described.

  Under the same conditions as those of Comparative Example 1 and Comparative Example 2 described above, a simulation was performed in which a load was applied to the solar cell module 1. As a result, the maximum value of the distortion of the solar cell panel 2 occurred near the corner portion 2h. The value was 170μ. Thereby, in the solar cell module 1 which concerns on this embodiment, it turned out that distortion can be reduced significantly. Thereby, the crack in the solar cell element 6 can be reduced, and the reliability of the electrical connection between the solar cell element 6 and the inner lead 5 is increased.

  In the present embodiment, as shown in FIG. 1B, a solar cell module having a hypotenuse 2g only on the left side is illustrated as the solar cell module 1. However, the solar cell module 1 is symmetrical with respect to the hypotenuse 2g on the left side. Even if it is a solar cell module of the shape which has a hypotenuse on the right side, the effect mentioned above can be acquired suitably. In such a form, the second frame (lower side) 11 has one opposing portion 11a and two non-opposing portions 11b located on both sides of the opposing portion 11a.

  Further, in the present embodiment, as shown in FIG. 1B, the other end of the auxiliary frame 16 abuts the central portion of the first frame (upper side) 12, and one end of the auxiliary frame 16 is the second frame ( The lower side) 11 is in contact with the central portion of the opposing portion 11b. That is, the second contact portion 16 b is located at the center portion of the first frame (upper side) 12, and the first contact portion 16 a is located at the center portion of the second frame (lower side) 11. However, the 1st contact part 16a and the 2nd contact part 16b are not limited to such a position. For example, the first contact portion 16a is located at the second end 11d of the facing portion 11b, and the second contact portion 16b is the end of the first frame (upper side) 12 on the fifth frame (oblique side) 15 side, that is, The form located in the 3rd end part 15a of the 5th flame | frame (diagonal side) 15 may be sufficient. In such a form, the effect of reducing stress relaxation and strain is enhanced.

(Second Embodiment)
Next, the solar cell module 101 which concerns on the 2nd Embodiment of this invention is demonstrated in detail using FIG.

  In the solar cell module 101 according to the present embodiment, more specifically, the auxiliary frame 16 is provided between the second frame (lower side) 11 and the fifth frame (slanted side) 15 at the position where the auxiliary frame 16 is disposed. This is different from the first embodiment.

  Thus, the second contact portion (upper) 16 b of the auxiliary frame 16 does not necessarily need to be positioned on the first frame (upper side) 12, and may be positioned on the fifth frame (slope side) 15. Even if it is such a form, while improving the intensity | strength of the solar cell module 101 similarly to 1st Embodiment mentioned above, distortion can be reduced efficiently. In particular, in the present embodiment, since the auxiliary frame 16 is provided over the fifth frame (slope side) 15, the size of the auxiliary frame 16 can be reduced. Therefore, in this embodiment, it can have both the effect which reduces the distortion in the solar cell panel 2, and the effect which reduces member cost.

Moreover, in this embodiment, as shown to Fig.8 (a), on the 2nd flame | frame (lower side) 11, between the 1st end part 11c of the non-opposing part 11b, and the 1st contact part (lower) 16b Distance D between
1 and the distance D2 between the second end portion 11d of the non-opposing portion 11b and the first contact portion (lower) 16a have the following relationship.

D1> D2
As described above, the position of the first contact portion (lower) 16a in the non-facing portion 11b of the second frame (lower side) 11 is in a relationship of “D1> D2”, so that the auxiliary frame 16 and the fifth frame ( The distance between the fulcrums of the solar cell panel 2 supported by the oblique side 15 and the auxiliary frame 16 and the fourth frame (left side) 14 can be further reduced. Thereby, the distortion produced in the solar cell panel 2 when a load is applied to the solar cell module 1 can be further reduced.

  Furthermore, in the solar cell module 101 according to the present embodiment, the distance D3 between the third end 15a on the fifth frame (slanted side) 15 and the second contact portion (upper) 16a, and the fourth end The distance D4 between the portion 15b and the second contact portion (upper) 16a has the following relationship.

D3 <D4
As described above, since the position of the second contact portion (upper) 16b on the fifth frame (slanted side) 15 is in the relationship of “D3 <D4”, the second contact portion (upper) 16b is connected to the fifth frame. It is located in the vicinity of the third end 15a on the (slanted side) 15. Since the second contact portion (upper) 16b arranged in this way is close to the third end portion 15a, the displacement of the fifth frame (slope side) 15 at the position of the second contact portion (upper) 16b is small. As a result, even when the auxiliary frame 16 is installed on the fifth frame (slanted side) 15, the strain near the corner portion 2h of the solar cell panel 2 can be efficiently reduced.

  Furthermore, by providing the auxiliary frame 16 over the fifth frame (slanted side) 15, the length of the auxiliary frame 16 can be shortened, and the same effect as in the first embodiment can be obtained with a small amount of raw materials. Thus, by arranging the auxiliary frame 16 so as to satisfy the relationship of “D3 <D4”, it is possible to more suitably combine the effect of reducing strain and the effect of reducing material.

  Next, the simulation result of the solar cell module 101 according to the present embodiment will be described with reference to FIG.

  A simulation for applying a load to the solar cell module 101 was performed under the same conditions as those of the comparative example 1, the comparative example 2, and the solar cell module 1 described above. As a result, the maximum value of strain generated in the vicinity of the corner portion 2h of the solar cell panel 2 was 150 μm. Thereby, in the solar cell module 101 which concerns on this embodiment, it became clear that distortion can be reduced efficiently.

  As mentioned above, although embodiment of this invention was illustrated, this invention is not limited to the said embodiment, It cannot be overemphasized that it can be made arbitrary, unless it deviates from the objective of this invention. Needless to say, the present invention includes various combinations of the above-described embodiments.

DESCRIPTION OF SYMBOLS 1, 101: Solar cell module 2: Solar cell panel 2a: Light-receiving surface 2b: Non-light-receiving surface 2c: Lower side 2d: Upper side 2e: Right side 2f: Left side 2g: Oblique side 2h: Corner part 3: Translucent substrate 4: Filler 5: Inner lead 6: Solar cell element 7: Back surface protective material 8: Terminal box 11: Second frame (lower side)
11a: opposing part 11b: non-opposing part 11c: first end part 11d: second end part 12: first frame (upper side)
13: Third frame (right side)
14: Fourth frame (left side)
15: Fifth frame (slope side)
15a: third end 15b: fourth end 16: auxiliary frame 16a: first abutting portion (lower)
16b: 2nd contact part (upper)
17: fitting groove 20: solar cell array 21: mount 30: solar cell module (Comparative Example 1)
31: Solar cell module (Comparative Example 2)
41: 1st fixing | fixed part 42: 2nd fixing | fixed part R1: 1st area | region R2: 2nd area | region

Claims (7)

A pentagonal solar cell panel having a hypotenuse obtained by cutting off one corner of a rectangle when viewed from above ;
A frame disposed on the outer periphery of the solar cell panel;
An auxiliary frame arranged on the back side of the solar cell panel and provided across the frame;
The frame has two fixing portions that are fixed to the surface to be installed and are substantially parallel and have different lengths.
The two fixing portions include a first fixing portion, a facing portion that is longer than the first fixing portion and faces the first fixing portion, and a non-facing portion that does not face the first fixing portion. The auxiliary frame has one end connected to the non-opposing portion of the second fixing portion when viewed from the back surface side of the solar cell panel, and a central portion of the auxiliary frame on the back surface. Passing through the second region other than the first region sandwiched between the portion and the opposing portion of the second fixing portion, the other end is disposed to be inclined toward the first region ,
The frame includes a first frame portion having the first fixing portion and a second frame portion having the second fixing portion,
The first frame part is connected to the parallel part having the first fixing part, and the second frame part is connected to the parallel part and the second part of the second frame part on the oblique side of the solar cell panel when viewed from the back side. And an inclined portion arranged to be inclined with respect to the fixed portion,
The solar cell module , wherein when viewed from the back side, the inclination angle θ1 of the auxiliary frame with respect to the second fixing portion is larger than the inclination angle θ2 of the inclination portion with respect to the second fixing portion . 2. The solar cell module according to claim 1 , wherein a frame is provided on each of both sides between the first frame portion and the second frame portion in the outer peripheral portion of the solar cell panel . The solar cell module according to claim 1 or 2 , wherein the auxiliary frame is extended from the non-opposing portion of the second fixing portion toward the inclined portion. The second fixing portion has one each of the facing portion and the non-facing portion,
The non-facing portion includes a first end portion that is close to the facing portion, a second end portion that is farther from the facing portion than the first end portion, and the first end portion and the second end portion. A first abutting portion located between and abutting the auxiliary frame,
The distance D1 between the first end portion and the first contact portion in the non-facing portion is greater than a distance D2 between the second end portion and the first contact portion . The solar cell module in any one . The inclined portion includes a third end portion that is close to the parallel portion, a fourth end portion that is farther from the parallel portion than the first end portion, and a space between the third end portion and the fourth end portion. And a second abutting portion that abuts on the auxiliary frame,
In the inclined portion, the distance D3 between said third end portion and the second contact portion, the smaller than the distance D4 between the fourth end portion and the second contact portion, one of the claims 1 to 4 the solar cell module according to either. The solar cell module according to any one of claims 1 to 5 , wherein the auxiliary frame is extended from the non-opposing portion of the second frame portion toward the parallel portion. The solar cell module according to any one of claims 1 to 6,
A fixing member for fixing the frame to the installation surface;
The two fixing parts are solar cell arrays fixed to the installation surface via the fixing member.