WO2016009922A1

WO2016009922A1 - Solar cell module

Info

Publication number: WO2016009922A1
Application number: PCT/JP2015/069673
Authority: WO
Inventors: 吉之介森; 伸裕野中; 守孝中村
Original assignee: シャープ株式会社
Priority date: 2014-07-17
Filing date: 2015-07-08
Publication date: 2016-01-21
Also published as: CN207251538U; JP2016029879A

Abstract

Provided is a solar cell module structured by including a lower frame having a support portion attached to the lower side peripheral edge of a solar cell module main body and having a spacer and a bonding layer between the lower side rear surface and the upper surface of the support portion of the lower frame, thereby having an improved attachment strength of the solar cell module main body and a power generation amount hardly decreasing due to dirt and snow. A frame body has side frames having a fitting portion and a lower frame having a support portion comprising a horizontal piece and a vertical piece. An elastic body is disposed between a solar cell module main body and the side frames, and a bonding layer is disposed between the solar cell module main body and the lower frame. Further, being structured so that the elastic body also makes contact with the vertical piece of the lower frame makes it possible to obtain a solar cell module having a sufficient load bearing performance.

Description

Solar cell module

The present invention relates to a solar cell module.

In recent years, interest in global environmental issues is increasing, and new energy technologies using natural energy are attracting a great deal of attention. As one of them, a system using solar energy is highly interested. In particular, solar power generation that converts light energy into electric energy using a photoelectric conversion effect is widely performed as a means for obtaining clean energy.

The solar cell element is manufactured using, for example, a single crystal silicon substrate or a polycrystalline silicon substrate. Since one solar cell element generates a small electric output, a plurality of solar cell elements are electrically connected to obtain a practical electric output.

The solar cell module body has a structure in which a plurality of solar cell elements connected in series or in parallel are arranged side by side on a back cover, and a transparent substrate (glass) is further arranged on the light receiving surface side of the solar cell element. . The solar cell element is sealed with a sealing resin such as EVA (ethylene vinyl acetate resin).

Further, a solar cell module having a structure in which a frame having a fitting portion having a U-shaped cross section is attached to the outer peripheral portion of the solar cell module body via an elastic body, an adhesive layer, or the like.

The solar cell module is usually installed on a roof or a base with an inclination with respect to a horizontal plane, and rainfall flows along the inclination of the solar cell module. However, since the solar cell module described above has a structure in which a frame is fitted to the outer periphery of the solar cell module main body, there is a step between the light receiving surface of the solar cell module main body and the frame. Due to this level difference, there is a problem that rainwater accumulates on the light receiving surface of the solar cell module at the time of rain, and the power generation amount of the solar cell module is reduced. This is because dirt such as dust, dust, soot, sand, pollen, and volcanic ash adheres to the light receiving surface of the solar cell module after the rainwater evaporates, and the amount of light reaching the solar cell element is reduced. .

In addition, when snow accumulates on the solar cell module, the snow catches on the step between the light receiving surface of the solar cell module body and the frame, making it difficult for snow to fall. There was a problem that it was difficult to recover the amount of power generation that was reduced by this.

As a solar cell that can reduce such a problem, for example, Patent Document 1 (Japanese Utility Model Publication No. 58-147260) discloses a solar cell module in which a step between the frame and the light receiving surface of the solar cell module body is eliminated. Has been proposed.

FIG. 23 is a diagram showing the solar cell module disclosed in Patent Document 1. In FIG. In the solar cell module 100, the solar cell module main body 101 is fixed to a frame 102, and the frame 102 includes left and

right side walls

102a and 102b and upper and

lower side walls

102c and 102d. The left and

right side walls

102a and 102b hold the light receiving surface of the solar cell module main body 101, but the upper and

lower side walls

102c and 102d are formed to be substantially flush with the light receiving surface of the solar cell module main body.

Also in Patent Document 2, a pair of side portions of a solar cell panel is covered with a first frame portion in a substantially U shape from a part of the surface to a part of the back surface, and the other pair of side portions are covered with the surface. A solar cell module having a structure that is substantially L-shaped and covered with a second frame portion from the side portion to a part of the back surface is disclosed.

In Patent Document 2, a sealing / protecting material made of butyl tape, rubber-based or resin-based packing, or silicone resin is inserted between the frame portion and the solar cell panel (solar cell module body in the present application). Is disclosed. Furthermore, it is disclosed that the second frame portion that does not cover the surface of the light receiving surface of the solar cell panel has an auxiliary support portion that extends toward the center of the solar cell panel on the back surface of the solar cell panel. This is because the solar cell panel is supplementarily supported, and the decrease in load bearing performance due to the second frame portion not covering the light receiving surface of the solar cell panel is compensated. Furthermore, it is disclosed that in order to further improve the load bearing performance, it is preferable that the second frame portion and the solar cell panel are bonded by an adhesive member made of a silicone resin or an adhesive.

Japanese Utility Model Publication No. 58-147260 JP 2014-68002 A

However, even when a structure in which the solar cell module main body and the frame that does not cover the light receiving surface side are bonded by an adhesive member as disclosed in Patent Document 2, sufficient load bearing performance may not be obtained. There was sex.

A solar cell module according to the present invention is a solar cell module having a solar cell module main body and a frame, the frame having a horizontal frame having a fitting portion and a lower frame adjacent to the horizontal frame, The frame has a support portion having a horizontal piece and a vertical piece, an elastic body is arranged between the horizontal frame and the solar cell module main body, and an adhesive layer is arranged between the lower frame and the solar cell module main body. The elastic body is in contact with the vertical piece of the lower frame.

According to the present invention, it is possible to obtain a solar cell module with high load bearing performance.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view which shows the 1st Embodiment of this invention and shows a solar cell module. 1 shows the first embodiment of the present invention and is an enlarged view of a portion A of the solar cell module shown in FIG. 1. FIG. FIG. 2 is a cross-sectional view taken along the line B-B ′ of the solar cell module shown in FIG. 1, showing the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line C-C ′ of the solar cell module shown in FIG. 1 according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line D-D ′ of the solar cell module shown in FIG. 1, showing the first embodiment of the present invention. It is a figure which shows the 1st Embodiment of this invention and shows a part of manufacturing process of a solar cell module. FIG. 7 shows the first embodiment of the present invention and is a partially enlarged view of the elastic body shown in FIG. 6. It is a figure which shows the 1st Embodiment of this invention and shows a part of manufacturing process of a solar cell module. The 2nd Embodiment of this invention is shown, Comprising: It is another example of an elastic body. The 2nd Embodiment of this invention is shown, Comprising: It is another example of an elastic body. It is a figure which shows the 3rd Embodiment of this invention, Comprising: The lower frame periphery of a solar cell module. FIG. 12 shows a third embodiment of the present invention and is a cross-sectional view taken along line FF ′ of the solar cell module shown in FIG. 11. The 4th Embodiment of this invention is shown, Comprising: It is a perspective view which shows a solar cell module. The 4th Embodiment of this invention is shown, Comprising: It is the elements on larger scale of a solar cell module. It is a figure which shows the 4th Embodiment of this invention, Comprising: The corner member of a solar cell module. It is a perspective view which shows the 5th Embodiment of this invention and shows a solar cell module. The 5th Embodiment of this invention is shown, Comprising: It is a figure which shows the installation structure of a solar cell module. It is a figure which shows the 5th Embodiment of this invention, Comprising: Another solar cell module installation structure. It is a figure which shows the 6th Embodiment of this invention, Comprising: The lower frame periphery of a solar cell module. FIG. 20 shows a sixth embodiment of the present invention and is a cross-sectional view taken along line GG ′ of the solar cell module shown in FIG. 19. It is a figure which shows the 7th Embodiment of this invention, Comprising: The lower frame periphery of a solar cell module. FIG. 22 shows a seventh embodiment of the present invention and is a cross-sectional view taken along line HH ′ of the solar cell module shown in FIG. 21. It is a figure which shows the conventional solar cell module.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Embodiment 1]
The solar cell module and the method for manufacturing the solar cell module according to Embodiment 1 will be described below with reference to the drawings.

FIG. 1 is a perspective view schematically showing a state in which the solar cell module of this embodiment is viewed from the light receiving surface side.

The solar cell module main body 1 is composed of a translucent base material, a sealing resin, a solar battery cell, a sealing resin, and a back surface side protective material from the light receiving surface side. A glass substrate was used as the translucent substrate, and EVA (ethylene vinyl acetate resin) was used as the sealing resin. A solar battery cell using a polycrystalline silicon wafer was used as the solar battery cell, and a multilayer sheet in which PET sheets were laminated as the back surface side protective material. Moreover, although description is abbreviate | omitted in FIG. 1, in order to obtain output power sufficient as a solar cell module, the several photovoltaic cell is electrically connected in series using internal wiring. Furthermore, the solar cell module has two extraction electrodes on the positive electrode side and the negative electrode side, one end of each extraction electrode is electrically connected to the solar cell, and the other end of the extraction electrode is connected to the terminal box. Electrically connected.

The solar cell module 1 is formed by fitting a frame into a side portion of a substantially rectangular solar cell module body 10. The four sides constituting the light receiving surface of the solar cell module body are defined as a pair of side sides, lower side, and upper side. In the solar cell module according to the present embodiment, the

horizontal frames

20 and 21 are fitted in the pair of opposing

side portions

11 and 12 of the solar cell module body 10 into which the

horizontal frames

20 and 21 are fitted, respectively. The horizontal frames 20 and 21 are close to the side edges 11 and 12. A lower frame 30 and an upper frame 31 are fitted into another pair of opposing side portions of the solar cell module body 10. The lower frame 30 is close to the lower side 13, and the upper frame 31 is close to the upper side 14.

The horizontal frames 20 and 21 are close to the side edges 11 and 12 of the solar cell module body 10 and cover the light receiving surface and the back surface of the side portion. Here, the back surface is a surface on the opposite side of the light receiving surface. On the other hand, the lower frame 30 is close to the lower side of the solar cell module main body 10 but does not cover the light receiving surface of the solar cell module main body 10. The upper frame 31 is close to the upper side 14 of the solar cell module body 10 but does not cover the light receiving surface of the solar cell module body 10. Since the upper frame and the lower frame do not cover the light receiving surfaces of the pair of side portions of the solar cell module main body, the volume of the frame can be reduced, and the solar cell module can be reduced in weight.

The solar cell module 1 is attached to the gantry inclining along the longitudinal direction of the

horizontal frames

20 and 21 so that the upper side is high and the lower side is low. When it rains on the solar cell module 1, the lower frame and the upper frame do not cover the light receiving surface of the solar cell module body, so that water flows smoothly on the light receiving surface of the solar cell module. Therefore, it is possible to prevent rainwater containing dust and dust from staying on the light receiving surface and evaporating, and depositing dust and dust on the light receiving surface to reduce the amount of power generation.

In addition, even when snow falls, the snow on the light receiving surface slides smoothly, so that it is possible to avoid the phenomenon that the power generation amount does not recover due to snow remaining on the light receiving surface for a long time. In addition, since the upper frame has the same structure as the lower frame, even if the solar cell modules are continuously installed in the vertical direction, the flow of water and the falling snow are not hindered.

A single solar cell module may be installed, or a plurality of solar cell modules may be installed along the longitudinal direction of the horizontal frame. Further, it may be installed along a direction substantially perpendicular to the longitudinal direction of the horizontal frame, or may be installed in a matrix.

In the present embodiment, a solar cell module in which the length in the longitudinal direction of the upper and lower frames is smaller than the length in the longitudinal direction of the horizontal frame is illustrated, but the length of the upper and lower frames is longer than the length in the longitudinal direction of the horizontal frame. It goes without saying that the same applies to the case where the length of the direction is longer.

FIG. 2 is an enlarged view of a portion A of the solar cell module shown in FIG. 1, and is a perspective view of one of corners where the side and lower sides of the solar cell module intersect from the light receiving surface side.

The lower frame 30 is fitted close to the lower side of the solar cell module body 10. The lower frame 30 does not cover the light receiving surface of the peripheral edge of the lower side 13 of the solar cell module body 10, and the upper end surface of the lower frame 30 is substantially flush with the light receiving surface of the solar cell module body 10. An adhesive layer 40 is disposed between the solar cell module body 10 and the lower frame 30, and the light receiving surface of the adhesive layer 40 is substantially flush with the light receiving surface of the solar cell module body 10. A silicone resin was used as the adhesive layer 40. By using a silicone resin, it became possible to maintain high adhesive strength between the lower frame and the solar cell module body. Moreover, since the silicone resin has high weather resistance and can maintain high adhesive strength, the long-term reliability of the solar cell module can be ensured.

The horizontal frame 21 was attached close to the side of the solar cell module body 10. The horizontal frame 21 covers the light receiving surface including the side 12 of the solar cell module body 10. An elastic body was disposed between the solar cell module main body 10 and the horizontal frame 21. An elastomer resin was used as the elastic body. The elastomer resin is in close contact with the solar cell module body 10 and the lateral frame 21. In addition to the elastomer resin, butyl rubber, silicone resin, synthetic rubber, or the like may be used.

FIG. 3 is a cross-sectional view taken along the line B-B ′ of the solar cell module 1 shown in FIG. 1, and shows the relationship between the solar cell module body and the lower frame.

The lower frame 30 is attached close to the solar cell module body 10. The lower frame 30 does not cover the light receiving surface of the solar cell module body 10, and the upper end surface of the lower frame 30 is substantially flush with the light receiving surface of the solar cell module body 10.

More specifically, the support portion 301 of the lower frame 30 of this embodiment includes a horizontal piece 301a and a vertical piece 301b. The front end of the vertical piece 301b of the support portion 301 is substantially on the same surface as the light receiving surface of the solar cell module body.

The adhesive layer 40 made of silicone resin is disposed between the back surface on the lower end side of the solar cell module body 10 and the upper surface of the horizontal piece 301a of the support portion 301 of the lower frame 30. Furthermore, an adhesive layer 40 made of silicone resin is also disposed between the end surface including the lower side 13 of the solar cell module main body and the vertical piece 301b of the support portion 301. By setting it as such a structure, since the adhesion area of the solar cell module main body 10 and the lower frame 30 becomes large, it becomes possible to raise the adhesive strength between a main body and a lower frame.

In the present embodiment, the case where the upper end surface of the lower frame is substantially flush with the light receiving surface of the solar cell module body has been described, but the upper end surface may be below the light receiving surface.

So far, the lower frame has been described as being arranged close to the lower side of the solar cell module body, but the same applies to the upper side and the upper frame.

FIG. 4 is a cross-sectional view taken along the line C-C ′ of the solar cell module 1 shown in FIG. 1, and shows the relationship between the solar cell module body and the horizontal frame.

The horizontal frame 20 is formed by extrusion of aluminum in the same manner as the lower frame and the upper frame. The horizontal frame 20 includes a fitting portion 22, a box portion 23, and a flange portion 24. The fitting portion 22 is located above the box portion 23 and is formed in a C shape in which an upper piece, a side piece, and a lower piece are connected. The box portion 23 has a shape in which an upper piece, an inner piece, a lower piece, and an outer piece are connected in a box shape. A partition piece is formed on the inner side, and connects the inner piece and the outer piece. Further,

screw hole portions

23a and 23b are formed in a part of the inner piece. The lower piece of the fitting portion 22 is shared with the upper piece of the box portion. The flange portion 24 is formed by extending the lower piece of the box portion 23 toward the inside of the solar cell module body 10. The front end of the flange portion 24 is formed to be bent slightly upward. The partition piece can be omitted depending on the structure of the frame.

The elastic body 50 made of elastomer resin is in close contact with the inner wall of the fitting portion 22. In the present embodiment, the elastic body 50 whose cross section is formed in a substantially C shape according to the shape of the inner wall of the fitting portion 22 is used. The horizontal frame 20 is attached to the solar cell module body 10 by inserting the solar cell module body 10 into the fitting portion 22 of the horizontal frame 20. The elastic body 50 sandwiched between the fitting portion 22 and the solar cell module main body 10 is compressed and comes into contact with the fitting portion and the solar cell module main body, thereby making it difficult to transmit the impact applied to the frame to the solar cell module main body. have. Moreover, it has the function which seals the end surface containing the side of a solar cell module main body more reliably, and prevents the penetration | invasion of a water | moisture content.

FIG. 5 is a DD ′ cross-sectional view including the fitting portion of the horizontal frame 20 of the solar cell module 1 shown in FIG. 1, and is one of the corners where the side and the lower side of the solar cell module body intersect. FIG.

The upper and lower pieces of the fitting portion 22 of the horizontal frame 20 are arranged on the light receiving surface side and the back surface side of the solar cell module body 10. Between the light receiving surface of the solar cell module body 10 and the upper piece constituting the fitting portion 22 of the horizontal frame 202, and the lower piece constituting the fitting portion 22 of the back surface and the horizontal frame of the solar cell module body 10 An elastic body 50 is disposed between the two.

The elastic body was arranged so as to contact the vertical piece of the lower frame. In other words, the elastic body 50 is also disposed between the end of the end surface 131 constituting the solar cell module main body and the vertical piece 301b of the lower frame 30. The end surface 131 is a surface substantially perpendicular to the light receiving surface including the lower side 13 of the solar cell module body. The vertical piece 301 b of the lower frame 30 is a part constituting the support portion 301 of the lower frame 30 and has an inner wall that is a surface substantially parallel to the end surface 131.

By arranging the elastic body 50 between the end of the end face 131 and the vertical piece 301b in this way, the distance between the inner wall of the vertical piece 301b of the lower frame 30 and the end face 131 is set to the length direction of the lower frame 30. It can be kept constant throughout. Therefore, the thickness of the adhesive layer 40 between the inner wall of the vertical piece 301b of the lower frame 30 and the end surface 131 can be made constant throughout. That is, a high adhesion strength between the solar cell module main body and the frame body was ensured, and the solar cell module stably having a high load resistance was obtained.

Next, a method for manufacturing the solar cell module of this embodiment will be described.

FIG. 6 is a schematic view showing the fitting of the side portion of the solar cell module body 10 and the horizontal frame 20 constituting the solar cell module of the present embodiment. Although the fitting of the side 11 and the horizontal frame 20 constituting the light receiving surface of the solar cell module body will be described, the same applies to the side 12 and the horizontal frame 21.

As shown in FIG. 6A, in the elastic body arranging step, an elastomer resin is fitted as the elastic body 50 into the side 11 of the solar cell module body 10, and the solar cell module body 10 side is fitted into the fitting portion of the horizontal frame 20. The side 11 and the elastic body 50 were fitted. The elastic body 50 is bent in a U shape so that the end surface including the side of the solar cell module main body is accommodated, and protects the end surface so as to wrap. Since the elastic body has a structure covering the entire side, the number of steps in the manufacturing process of the solar cell module can be reduced, and the manufacturing cost can be reduced.

Next, as shown in FIG. 6 (b), the solar cell module main body in which the elastic body 50 was arranged in the horizontal frame arranging step was fitted into the fitting portion of the horizontal frame.

FIG. 7 shows a partially enlarged view of the elastic body 50. It is the figure which looked at the edge part E of the elastic body 50 in Fig.6 (a) from the solar cell module main body side.

The elastic body 50 has an end surface contact portion 501 in addition to the light receiving surface contact portion 502 and the back surface contact portion 503. The light receiving surface contact portion 502 is a portion that contacts the light receiving surface including the side 11 of the solar cell module body, and the back surface contact portion 503 is a portion that contacts the back surface of the solar cell module body. Moreover, the end surface contact part 501 is a part which contacts the end surface 131 including the lower side of a solar cell module main body. Thus, the elastic body has a structure having the end surface contact portion 501 that contacts not only the end surface including the side 11 but also the end surface 131 including the lower side. In other words, the elastic body 50 has a structure protruding to the lower frame side. By setting it as such a structure, the space | interval of a fixed space | interval was formed between the solar cell module main body and the inner wall face of the vertical piece 301b of a lower frame. That is, the thickness t of the end surface contact portion 501 shown in FIG. 7 is the thickness of the adhesive layer 40.

Although the portion in contact with the lower frame of the elastic body 50 has been described, the portion in contact with the upper frame has a similar structure. Therefore, since the side of the solar cell module main body is fitted into the cavity of the elastic body 50, the position of the elastic body 50 with respect to the solar cell module main body is determined almost uniquely.

FIG. 8 is a schematic diagram showing a process of attaching the lower frame 30 to the solar cell module body 10 constituting the solar cell module of the present embodiment. The horizontal frame is omitted in the figure.

As shown in FIG. 8A, the adhesive layer 40 is arranged on the horizontal piece 301a of the support portion 301 of the lower frame 30 in the adhesive layer arranging step. The adhesive layer 40 is made of a silicone resin, and is disposed over the entire longitudinal direction of the lower frame 30. The adhesive layer 40 may also be disposed on the inner wall surface that is the surface of the vertical piece 301b of the support portion 301 on the solar cell module main body side. Further, the adhesive layer may be disposed on the side of the solar cell module body.

Next, as shown in FIG. 8B, in the lower frame arranging step of arranging the lower frame on the solar cell module body, the solar cell is placed on the light receiving surface side of the support portion 32 of the lower frame 30 on which the adhesive layer 40 is placed. The module was placed. The elastic body 50 and the

horizontal frames

20 and 21 are attached to the sides of the solar cell module body. Since the elastic body 50 has the end surface contact portion 501, when the solar cell module body is placed, the elastic body 50 is constant between the vertical piece 301 b of the support portion 301 of the lower frame 30 and the end surface of the solar cell module body 10. A gap of width is formed. In the present embodiment, the thickness t of the end surface contact portion 501 is designed to be 2 mm so that a gap of about 2 mm is formed. Therefore, even if the adhesive layer 40 is uncured and has fluidity, it is possible to prevent the width of the adhesive layer from being locally reduced when the solar cell module body is placed.

Furthermore, by using the elastic body 50 that protrudes not only on the lower frame side but also on the upper frame side, the solar cell module main body can be arranged at the approximate center between the upper frame and the lower frame.

In this embodiment, since a room temperature curing type silicone resin was used as the adhesive layer 40, the adhesive strength could be obtained without heating.

In this embodiment, in order to further increase the adhesive strength between the solar cell module body and the frame, the horizontal frame and the lower frame, and the horizontal frame and the upper frame are screwed.

太陽 By manufacturing the solar cell module by such a method, a solar cell module having a strong adhesive strength between the solar cell module body and the frame can be manufactured.

Also, as a secondary effect, it has become possible to improve the design when a plurality of solar cell modules are placed. When the solar cell modules are arranged with regularity, the parallelism between the solar cell module main body and the frame cannot be maintained, and there is a problem that it is difficult to obtain a sense of unity as a whole. By maintaining the parallelism between the solar cell module main body and the frame, it was possible to improve the design when a plurality of solar cell modules were placed. This is because a sense of unity as a whole was obtained.

[Embodiment 2]
A solar cell module according to Embodiment 2 will be described with reference to the drawings. The difference from Embodiment 1 is the shape of the elastic body. A description of the same parts as those in the first embodiment will be omitted.

FIG. 9 is an example of an elastic body used in the solar cell module of this embodiment.

As shown in FIG. 9 (a), the end surface contact portion may have an uneven shape. By adopting such a structure, even when there is a difference in the width of the horizontal piece 301a between the upper frame and the lower frame, the difference can be absorbed. This is because it has an uneven shape, so that the width of the end surface contact portion can be changed with a relatively small force such as suppressing the lower frame.

An elastic body divided into a plurality of parts as shown in FIG. 9B may be used. By using such an elastic body, it is possible to easily absorb the tolerance of the side of the solar cell module close to the horizontal frame.

FIG. 10 shows still another example of the elastic body of the present embodiment.

The end of an object having a substantially U-shaped cross section as shown in FIG. 10A may be crimped to obtain an elastic body as shown in FIG. It is possible to manufacture a wide variety of solar cell modules at a reduced manufacturing cost. This is because the length of the elastic body in the long side direction can be freely changed, so that it is not necessary to form a mold for molding the elastic body even when the size of the solar cell module main body is changed.

[Embodiment 3]
A solar cell module and a method for manufacturing the solar cell module according to Embodiment 3 will be described with reference to the drawings. The difference from the first embodiment is that a spacer is arranged on a lateral piece of the support portion of the lower frame.

FIG. 11 is a perspective view of the periphery of the lower frame of the solar cell module according to the present embodiment as viewed from the light receiving surface side. The horizontal frame is omitted.

The solar cell module of the present embodiment includes a spacer 61 and an adhesive layer 41 between the solar cell module main body 15 and the upper surface of the support piece horizontal piece of the lower frame. Five spacers 61 are arranged at substantially equal intervals in the longitudinal direction of the lower frame, and a portion of the lower piece of the horizontal piece without the spacer is covered with the adhesive layer 41. The spacer 61 was formed using a material mainly composed of EPDM (ethylene propylene rubber). The material is not necessarily limited to EPDM, and any material can be used as long as it is heat resistant and does not greatly deform even when the solar cell module body 15 is placed. In some cases, the internal wiring or the extraction electrode of the solar cell module is disposed at a position close to the spacer. When heat is generated in the internal wiring or the extraction electrode, heat is transmitted to the spacer and the spacer does not thermally deform, so heat resistance is required.

Further, a silicone resin was used as the adhesive layer 41. The width of the adhesive layer 41 was about 2 cm. Here, the width of the adhesive layer 41 is a length in a direction substantially perpendicular to the longitudinal direction of the lower frame 33.

Since EPDM, which is the main component of the spacer 61, has a higher hardness at room temperature than the silicone resin used as the adhesive layer 41, it is possible to prevent the solar cell module body 15 from being bent due to its own weight. In order to surely prevent the deflection, it is desirable that the spacer 41 is disposed at least approximately in the center of the lower frame 33 in the longitudinal direction. In order to improve moisture resistance as a back surface protection member, a laminated film having a structure in which an aluminum layer is inserted between PET films may be used. When deflection occurs due to the weight of the solar cell module body 15, the distance between the Al layer in the back surface protective material and the lower frame is shortened, and when a high voltage is applied to the solar cell module due to a lightning strike, etc., dielectric breakdown occurs. There was a risk of occurrence. By disposing the spacer 61, it is possible to prevent the deflection and further improve the reliability of the solar cell module.

12 is a cross-sectional view of the periphery of the lower frame of the solar cell module of the present embodiment, taken along the line FF ′ of the solar cell module in FIG. 11. Spacers are formed on the horizontal pieces 34 a of the support portion 34 of the lower frame 33. 61 and the adhesive layer 41 are arranged, and the solar cell module main body 15 is placed on the spacer 61 and the adhesive layer 41. The end surface on the lower side of the solar cell module main body 15 and the end surface of the vertical piece 34b of the support portion 34 of the lower frame 33 are substantially the same surface.

A method for manufacturing the solar cell module of this embodiment will be described. The description of the same parts as those in Embodiment 1 is omitted.

In the spacer placing step, the spacers 61 were arranged at five locations on the horizontal piece 34a of the support portion 34 of the lower frame 33. A spacer 61 having adhesiveness was used. Therefore, since the relative position of the support part 34 and the spacer 61 does not change even in the subsequent steps, the solar cell module can be stably produced. In this embodiment, the spacers are arranged at five locations, but the number is not limited to this. It is desirable to dispose spacers at at least three locations in the longitudinal direction of the horizontal piece 34a of the support portion 34 and at substantially the central portion in the longitudinal direction.

Next, in the adhesive layer arranging step, the adhesive layer 41 was arranged on the horizontal piece 34a of the support portion 34 of the lower frame 33. Silicone resin was used as the adhesive layer, and the spacer 61 was disposed away. At that time, the height of the adhesive layer 41 was set to be substantially the same as the height of the spacer 61. When the height of the adhesive layer 41 is lower than the height of the spacer 61, a sufficient contact area between the adhesive layer 41 and the support portion 34 of the lower frame 33 or between the adhesive 41 and the back surface of the solar cell module body 15 cannot be secured. This is because the adhesive strength may not be obtained. Moreover, when the height of the contact bonding layer 41 is higher than the height of the spacer 61, the contact bonding layer 41 protrudes from an end surface, and the design property of a solar cell module is impaired. Therefore, it is desirable to arrange the adhesive layer so that the height of the adhesive layer is substantially the same as the height of the spacer.

Since the spacers 61 are disposed at least at three positions, at least both ends in the longitudinal direction of the support portion 34 and approximately the central portion in the longitudinal direction, the center portion of the glass substrate is bent due to the weight of the solar cell module body, and the adhesive layer It became possible to prevent 51 from becoming thin locally, and it became possible to obtain high adhesive strength stably.

[Embodiment 4]
A solar cell module and a method for manufacturing the solar cell module according to Embodiment 4 will be described with reference to the drawings. The difference from the first embodiment is that a corner member is used. A description of the same parts as those in the first embodiment will be omitted.

FIG. 13 is a perspective view schematically showing the solar cell module of the present embodiment as viewed from the light receiving surface side. Two horizontal frames, an upper frame, and a lower frame are fitted into the solar cell module body 16, and corner members 70 are installed at four corners of the solar cell module body 16. The corner members 70 cover the corners of the solar cell module main body 16 and are connected to frame bodies fitted in two adjacent sides of the solar cell module main body 17. For example, the corner member 70 shown in FIG. 13 connects the horizontal frame 22 and the lower frame 34. By attaching the corner member, it is possible to more reliably prevent the solar cell module body from being detached from the frame body due to its own weight when the solar cell module is installed at an inclination.

FIG. 14 is a partially enlarged view of the solar cell module of the present embodiment, and is a view of a corner portion of the solar cell module as viewed from the light receiving surface side. The corner member 70 has the same width as the width of the horizontal frame 22 on the upper side where the upper piece 71a, which is a portion close to the upper side of the solar cell module main body 16, abuts on the horizontal frame 22, The lower side sandwiching the lower side 18 is wider than the upper side and wider than the horizontal frame 22. Since the corner member 70 can support the lower side 18 over a length larger than the width of the horizontal frame, the attachment strength between the solar cell module main body 16 and the frame can be increased.

Further, the light receiving surface of the fitting portion 71 of the corner member 70 has a gentle curve, and the width is continuously increased from the upper side to the lower side of the solar cell module body 17. In other words, rainwater is hard to collect, and snow is also likely to slide down. Since rainwater does not collect easily, dust and dust contained in rainwater are less likely to evaporate and adhere to the light receiving surface, exhibiting an antifouling effect, and preventing power generation efficiency from being lowered. In addition, since the snow is likely to slide down, the power generation function of the solar cell module can be quickly recovered.

FIG. 15 is a perspective view showing a corner member of the solar cell module of the present embodiment. FIG. 15A and FIG. 15B show the corner member 70 as seen from different directions.
The corner member 70 includes a fitting portion 71, a box portion 72, and a convex portion 75. In the fitting portion 71, the groove formed by the upper piece 71 a and the lower piece 71 b is fitted to the side 17 and the lower side 18 of the solar cell module body 16. The upper piece 71 a is formed so that the portion closer to the lower side 18 is wider than the portion that contacts the horizontal frame 22.

Also, the edge of the upper piece 71a is tapered and thinned, and the step with the light receiving surface of the solar cell module body 16 is reduced to reduce the accumulation of snow, dust and dust. The fitting portion 71 is provided with a notch 74.

The box part 72 has a structure in which an upper piece, an outer piece, a lower piece, and an inner piece are sequentially connected, and a partition piece is provided between the upper piece and the lower piece. A part of the upper piece is shared with the lower piece of the fitting portion 71. Moreover, the through-

holes

72a and 72b are provided in the frame body connection piece which is a surface connected to the frame body, and the engaging claw 73 is provided between the through holes.

The convex portion 75 is formed below the box portion 72, and a hole is formed as an engaging means for engaging with an engaging member for attaching to the gantry. In addition, it also serves as a guide when the solar cell modules are stacked and stored. That is, when the solar cell modules are stacked, the convex portion 75 is positioned in the notch 74 of the solar cell module one level below. In the corner members 70 at the four corners, the convex portions 75 are positioned in the notches 74, and the solar cell module can be prevented from being displaced when stacked.

The horizontal frame 22, the lower frame 34, and the corner member 70 are fastened by screwing two screws into the hollow portion of the box portion 72 of the corner member 70. In this embodiment, a tapping screw is used. In this way, the screw hole portion is formed with a screw thread at the same time as the screw is inserted. By doing in this way, the corner | angular part of a solar cell module main body can be clamped from the both sides of the light-receiving surface of the solar cell module main body 16, and the surface opposite to a light-receiving surface. In particular, since the end of the lower side of the solar cell module body 16 is sandwiched, the attachment strength between the solar cell module body 16 and the frame increases, and the reliability increases. Further, the corner member 70 sandwiches the side 17 and the lower 18 of the solar cell module body 16. Since the corner member can hold both the side and lower sides of the solar cell module body with one member, the mounting strength can be increased. That is, it is possible to provide a solar cell module with higher attachment strength between the solar cell module main body and the frame without preventing snowfall from sliding down.

[Embodiment 5]
A solar cell module and a method for installing the solar cell module according to Embodiment 5 will be described with reference to the drawings. The difference from the solar cell module described in Embodiment 1 is that it has an auxiliary frame. A description of the same parts as those in the first embodiment will be omitted.

As shown in FIG. 16, in the solar cell module of this embodiment, a pair of horizontal frames are fitted into the sides of a substantially rectangular solar cell module body, a lower frame 35 is attached in the vicinity of the lower side, and the upper side is in the vicinity. Thus, the upper frame 36 is attached. The horizontal frame 23 covers the light receiving surface and the back surface of the side portion of the solar cell module main body. On the other hand, the lower frame 35 is attached close to the lower side of the solar cell module body, but does not cover the light receiving surface of the solar cell module body. The upper frame 36 is attached close to the upper side of the solar cell module main body, but does not cover the light receiving surface of the solar cell module main body.

In the present embodiment, the auxiliary frame 80 is further disposed on the back surface of the solar cell module main body substantially parallel to the horizontal frame. One end of the auxiliary frame 80 was fitted to the upper frame 36, and the other end was fitted to the lower frame 35. Furthermore, a part of the auxiliary frame was bonded to the back surface of the solar cell module body with an adhesive resin. The entire auxiliary frame may be bonded, or may not be bonded at all. By arranging the auxiliary frame in this way, high adhesive strength can be maintained between the solar cell module main body and the frame body even when a load is applied to the solar cell module. Moreover, since the deflection of the solar cell module body can be reduced, it is possible to maintain the design properties when installed.

The solar cell module is installed inclined along the longitudinal direction of the horizontal frame. During installation, the gantry was arranged substantially parallel to the longitudinal direction of the horizontal frame, and a plurality of solar cell modules were arranged on the gantry. When viewed from the light receiving surface side, the auxiliary frame and the mount were installed so as not to overlap each other. By not using the layout design based on the assumption that the auxiliary frame and the mount overlap, the degree of freedom in mount design and mount member placement can be ensured.

So far, the case where one auxiliary frame is arranged has been shown, but a plurality of auxiliary frames may be arranged substantially parallel to the horizontal frame. By arranging a plurality, it becomes possible to maintain high adhesive strength between the solar cell module body and the frame more stably.

Further, the auxiliary frame may be arranged substantially parallel to the upper and lower frames.

As shown in FIG. 17, a plurality of solar cell modules having auxiliary frames 80 were installed inclined along the longitudinal direction of the horizontal frame. In any of the solar cell modules, since the upper frame and the lower frame do not cover the light receiving surface of the solar cell module body, snow and dirt flow down in the longitudinal direction of the horizontal frame of the solar cell module.

When installing the solar cell module, a plurality of crosspieces 90 were installed along the longitudinal direction of the horizontal frame of the solar cell module. The upper and lower frames of the solar cell module were fixed to the crosspiece 90. When viewed from the light-receiving surface side, the auxiliary frame and the crosspiece were installed so as to be in a positional relationship so as not to overlap each other. By not performing the layout design on the premise that the auxiliary frame and the crossing overlap, it is possible to ensure the flexibility of the frame design and the frame member arrangement.

FIG. 18 shows another installation example of a plurality of solar cell modules having the auxiliary frame 81. A difference from the installation structure shown in FIG. 18 is that the crosspieces are installed along the longitudinal direction of the upper frame and the lower frame. Since the solar cell module has a structure having the auxiliary frame 81 substantially parallel to the horizontal frame, the crosspiece and the auxiliary frame are orthogonal to each other.

A plurality of crosspieces 91 are arranged immediately below the upper and lower frames of the solar cell module. Since the crosspieces are arranged directly below the upper frame and the lower frame, there is no problem in any fixing location, but it is preferable to be in the middle of the side instead of the four corners of the solar cell module. By fixing the midpoint, the load applied to the solar cell module is dispersed and can be stably fixed. The fitting part of the auxiliary frame and the lower frame and the auxiliary frame and the upper frame was designed so that the auxiliary frame 81 and the crosspiece 91 do not overlap. Even when a load is applied to the solar cell module, the auxiliary frame does not contact the crosspiece. When the auxiliary frame contacts the crosspiece, the crosspiece suppresses the deflection of the auxiliary frame when a load is applied to the solar cell module. As a result, stress concentrates directly on the auxiliary frame of the solar cell module, and there is a possibility that the solar cell is cracked. By adopting a structure in which the auxiliary frame and the crosspiece do not contact each other, it is possible to prevent local concentration of stress on a part of the solar cell module.

[Embodiment 6]
A solar cell module according to Embodiment 6 will be described with reference to the drawings. The difference from the first embodiment is that a double-sided adhesive tape is arranged on the horizontal piece of the support portion of the lower frame.

FIG. 19 is a perspective view of the periphery of the lower frame of the solar cell module according to the present embodiment as viewed from the light receiving surface side. The horizontal frame is omitted. FIG. 20 is a cross-sectional view of the periphery of the lower frame of the solar cell module of the present embodiment, corresponding to the GG ′ cross section of the solar cell module in FIG.

In the solar cell module of the present embodiment, the double-sided adhesive tape 62 is disposed between the back surface of the solar cell module main body 151 and the upper surface of the horizontal piece 371a of the support portion 371 of the lower frame 37.

The double-sided adhesive tape 62 was arranged over almost the entire surface in the longitudinal direction of the lower frame 37. With the double-sided adhesive tape 62, it is possible to obtain a joint between the supporting portion lateral piece of the lower frame 37 and the solar cell module main body. The double-sided adhesive tape 62 was formed using a material mainly composed of polyethylene. The material is not necessarily limited to polyethylene, and any material can be used as long as it is heat resistant and does not deform greatly even when the solar cell module main body 151 is placed. This is because when the internal wiring and the extraction electrode of the solar cell module are arranged at a position close to the double-sided adhesive tape and heat is generated, heat is transferred to the double-sided adhesive tape and is prevented from being thermally deformed.

Furthermore, an adhesive layer 42 was disposed between the solar cell module main body 151 and the vertical piece 371 b of the support portion 371 of the lower frame 37. A silicone resin was used as the adhesive layer 42. The end surface on the lower side of the solar cell module main body 151 and the end surface of the vertical piece 371b of the support portion 371 of the lower frame 37 are substantially the same surface.

So far, silicone resin sometimes protrudes between the solar cell module body and the frame body during transportation, packing, and transportation in the process of the solar cell module. When the silicone resin protrudes, there is a possibility that sufficient adhesive strength cannot be obtained due to insufficient thickness of the adhesive layer. Furthermore, the design of the solar cell module may be impaired. As a result of the examination, it was found that the protrusion of the silicone resin occurs when a local load is applied during transportation, packing, and transportation in the process of the solar cell module. This is because only the surface of the adhesive layer is cured and the inside is not yet cured, so when a load is applied, the internal pressure of the adhesive layer increases and the uncured adhesive layer protrudes from the surface of the adhesive layer. It is done.

Between the horizontal piece 371a of the support portion 371 of the lower frame 37 and the solar cell module main body 151, since the double-sided adhesive tape is disposed over almost the entire surface, even if a load is applied to the light receiving surface, pressure is not transmitted to the silicone resin, Since the height does not rise, no protrusion occurs. In other words, it has become possible to produce a solar cell module with high load bearing performance without increasing the time required for curing the adhesive layer or heating the solar cell module to promote curing.

Since the double-sided adhesive tape 62 is disposed over almost the entire surface between the horizontal piece 371a of the support portion 371 of the lower frame 37 and the solar cell module main body 151, even if a load is applied to the light receiving surface of the solar cell module, The adhesive layer 42 no longer protrudes. This is probably because the pressure is not transmitted to the adhesive layer and the internal pressure does not increase. Another reason is considered to be that the amount of the silicone resin used as the adhesive layer is reduced, the time required for curing is shortened, and the silicone resin is completely cured to the inside.

That is, by adopting the structure of the solar cell module disclosed in the present embodiment, a solar cell having high load bearing performance without increasing the curing time of the adhesive layer or heating the solar cell module to promote curing. It became possible to produce modules.

The double-sided adhesive tape 62 may be disposed between the vertical piece 371b of the support portion 371 of the lower frame 37 and the solar cell module main body 151. In this case, it is desirable to arrange the adhesive layer 42 on the light receiving surface side. This is because when the double-sided tape is used, it is possible to prevent the double-sided backing tape from being seen from the light-receiving surface side and the feeling of being lost.

[Embodiment 7]
A solar cell module according to Embodiment 7 will be described with reference to the drawings. The difference from Embodiment 1 is that two types of adhesive layers are used.

FIG. 21 is a perspective view of the periphery of the lower frame of the solar cell module of the present embodiment as viewed from the light receiving surface side. The horizontal frame is omitted. FIG. 22 is a cross-sectional view of the periphery of the lower frame of the solar cell module of the present embodiment, corresponding to the HH ′ cross section of the solar cell module in FIG.

The solar cell module of this embodiment includes a spacer 63 and an adhesive layer 43 between the solar cell module main body 152 and the upper surface of the horizontal piece 381a of the support portion 381 of the lower frame 38. Seven spacers 63 are arranged at substantially equal intervals in the longitudinal direction of the lower frame, and a portion of the lower piece of the horizontal piece without the spacer is covered with an adhesive layer 43. The spacer 63 was formed using a material mainly composed of EPDM (ethylene propylene rubber). A silicone resin was used as the adhesive layer 43. Since EPDM, which is the main component of the spacer 63, has a higher hardness at room temperature than the silicone resin used as the adhesive layer 43, it is possible to prevent the solar cell module main body 152 from being bent due to its own weight.

The adhesive layer 44 was disposed between the solar cell module main body 152 and the vertical piece 381b of the support portion 381 of the lower frame 38. The adhesive layer 44 is characterized by being cured in a shorter time than the adhesive layer 43. As the adhesive layer 44, for example, a foamed silicone resin obtained by mixing a gas into the adhesive layer 43 can be used. By arranging an adhesive layer that takes a short time to cure between the vertical piece of the support part of the lower frame and the solar cell module body, it is possible to prevent the adhesive layer from protruding to the light receiving surface side of the solar cell module It has become possible.

If the adhesive layer 44 is completely cured, even if the adhesive layer 43 is not sufficiently cured and the internal pressure of the adhesive layer 43 increases due to the load, the adhesive layer 44 is formed on the light receiving surface side of the solar cell module. This is because it does not protrude.

In this embodiment, a two-component silicone resin is used as the adhesive layer 43 and the adhesive layer 44, but a one-component silicone resin may be used. Needless to say, the adhesive layer is not limited to the silicone resin, and may be made of other materials.

In any of the embodiments so far, the solar cell module in which the length in the longitudinal direction of the upper and lower frames is smaller than the length in the longitudinal direction of the horizontal frame is illustrated. It goes without saying that the same applies to the case where the length of the frame in the longitudinal direction is longer.

As mentioned above, although Embodiment 1 to Embodiment 5 were 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.

It should be noted that the embodiment disclosed this time is an example in all respects and does not serve as a basis for 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, 15, 151, 152, 16 Solar cell module

main body

11, 12, 17

Side

13 and 18 Lower side 14

Upper side

20, 22

Horizontal frame

30, 32, 34, 35, 37, 38

Lower frame

31, 36

Upper frame

40, 41, 42, 43, 44 Adhesive layer 50

Elastic body

61, 63 Spacer 62 Double-sided adhesive tape 70

Corner member

80, 81

Auxiliary frame

90, 91 Crosspiece

Claims

A solar cell module having a solar cell module body and a frame,
The frame body has a horizontal frame having a fitting portion and a lower frame adjacent to the horizontal frame,
The lower frame has a support portion having a horizontal piece and a vertical piece,
An elastic body is disposed between the horizontal frame and the solar cell module body,
An adhesive layer is disposed between the lower frame and the solar cell module body,
The elastic body is a solar cell module in contact with the vertical piece of the lower frame.
The solar cell module according to claim 1, wherein the elastic body covers the entire side of the light receiving surface of the solar cell module main body adjacent to the horizontal frame.
The solar cell module according to claim 1 or 2, wherein the adhesive layer and a spacer are provided between the horizontal piece of the lower frame and the solar cell module main body.
The solar cell module according to claim 1 or 2, wherein a double-sided adhesive tape is disposed between the horizontal piece of the lower frame and the solar cell module main body.
Than the adhesive layer disposed between the horizontal piece of the lower frame and the solar cell module body,
The solar cell module according to any one of claims 1 to 3, wherein the adhesive layer disposed between the vertical piece of the lower frame and the solar cell module body has a shorter time required for curing.