JP5235395B2 - Solar cell module - Google Patents

Description

  The present invention relates to a solar cell module installed in a building such as a house, a building, or a factory.

  Conventionally, as a solar cell module, a transparent substrate (glass) is arranged on the light receiving surface side, and a plurality of solar cells connected in series or in parallel are arranged side by side on the back surface side of the transparent substrate. A solar cell panel is formed by sealing with a sealing resin, and a frame member having a U-shaped portion that bites the outer periphery of the solar cell panel is used as a cushioning material such as a sealing material or an adhesive. A solar cell module having a structure attached via a common structure is often used. In this solar cell module, a predetermined strength is secured by the transparent substrate and the frame member. Moreover, in a house, a building, a factory, etc., a solar cell array in which a plurality of solar cell modules are arranged at an arbitrary inclination angle using the same angle as a roof surface or a frame is installed.

  In a solar cell module, since the frame member generally provided in the peripheral part becomes convex from the solar cell panel light-receiving surface side, rainwater collects at the lower surface end of the solar cell panel due to the inclination of the solar cell module. When the accumulated water evaporates, dirt remains on the transparent substrate in the form of accumulated water. Dirt accumulates due to repeated accumulation and evaporation of rainwater, and this dirt reduces the power generation capability of the solar cell module. In particular, when the solar cell module is installed at a low gradient, the range in which rainwater accumulates becomes large and the range in which the rainwater collects becomes wider. Moreover, in a large-sized solar cell module, the center of the transparent substrate of the solar cell module is recessed, so that the range in which rainwater accumulates is widened and the range of dirt is also widened. As a countermeasure against this, it is effective to reduce the liquid such as rain water collected on the light receiving surface side of the solar cell module in order to reduce the dirt. Conventionally, measures have been proposed to drain water to the outside of the frame member by providing a drainage structure on the light receiving surface side of the frame member (see, for example, Patent Documents 1 and 2).

  In the solar cell array, the solar cell modules are arranged without gaps. Therefore, when drainage is performed by providing a cutout in the frame member of the solar cell module, water containing a lot of dirt flows into the lower module, and the lower module Will soil the module. Moreover, when a stand or the like is disposed below the solar cell module, drainage from the side surface of the frame member may be hindered. Therefore, a structure for draining to the back side of the solar cell module is effective, and Patent Document 1 also proposes a frame member structure for draining to the back side of the solar cell module.

Japanese Utility Model Publication No. 60-103855 Japanese Utility Model Publication No. 6-17257

  Having a mechanism that can drain the water on the transparent substrate of the solar cell module to the lower solar cell module and not to the lower solar cell module is important for maintaining the power generation capacity of the solar cell module in actual installation. It is. However, according to the above conventional technique, it is not easy to produce the drainage structure, and the manufacturing cost is high. Therefore, the improvement of the frame member structure which is good in manufacturability and capable of taking measures against drainage at low cost has been demanded. Further, there has been a demand for improving drainage efficiency by securing a sufficient drainage route to reduce the amount of water pool at a low slope.

  This invention was made in order to solve the above-mentioned subject, and drains to the back side of a solar cell panel by adding a low-cost simple process to the frame member designed as a frame of a solar cell panel. It aims at obtaining the solar cell module which enables this. Moreover, it aims at obtaining the solar cell module which improves drainage efficiency more.

  In order to solve the above-described problems and achieve the object, the solar cell module of the present invention includes a solar cell panel in which a plurality of solar cells are arranged, and a U-shaped portion having a U-shaped cross section, and an outer edge of the solar cell panel. A solar cell module having a frame member that surrounds the entire circumference of the frame member, and a cushioning material that is disposed within the U-shaped portion of the frame member and is sandwiched between the outer edge of the solar cell panel, At least in one place, a cutout or a groove is formed on two opposing surfaces of the U-shaped portion until the width of at least the remaining portion is equal to or less than the sum of the thickness of the side plate thickness and the cushioning material. And the buffer material at the position where the notch is provided is deleted to form a drainage channel that leads from the light receiving surface side to the back surface side.

  According to the solar cell module of the present invention, a notch is formed by forming a notch or a groove on the two opposing surfaces of the U-shaped part, and no cushioning material is disposed in the notch. Since the drainage channel is formed, drainage to the back side of the solar cell panel is enabled by adding low-cost simple processing to the frame member, and drainage efficiency is improved.

  Embodiments of a solar cell module according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a perspective view of a solar cell module according to Embodiment 1 of the present invention, and shows a state in which a frame member is attached to a solar cell panel. FIG. 2 is a front view of the solar cell module. FIG. 3 is a cross-sectional view taken along the line AA, enlarging a portion surrounded by a dotted line in FIG. 2, showing a state in which a notch is provided in the U-shaped portion of the frame member. 1 to 3, a solar cell module 100 includes a solar cell panel 2 in which a plurality of solar cells 4 are arranged, and a U-shaped portion having a U-shaped cross section, and the outer edge of the solar cell panel 2 extends over the entire circumference. It has the surrounding frame member 1 and the shock absorbing material 3 arrange | positioned in the U-shaped part of the frame member 1. FIG. The buffer material 3 is a sealing material, an adhesive, or the like, and is sandwiched between the U-shaped portion of the frame member 1 and the outer edge portion of the solar cell panel 2 over the entire circumference. And in one place of the frame member 1, notches 1e and 1f are formed on two opposing surfaces of the U-shaped portion to provide a notch.

  The solar cell panel 2 has a transparent substrate (glass) (not shown) arranged on the light receiving surface side, and a plurality of solar cells 4 connected in series or in parallel on the back surface side of the transparent substrate. The battery cell 4 is produced by sealing with a resin such as EVA (ethylene vinyl acetate) or an electrically insulating material such as PET (polyethylene terephthalate).

  The frame member 1 is manufactured by extrusion molding of aluminum or the like, and is opposed to a pair of long bar members 1A and 1B facing each other, and a pair of short bar members 1C connected between both ends of the long bar members 1A and 1B. , 1D. The pair of long bar members 1A and 1B and the pair of short bar members 1C and 1D are connected to each other at right angles by fastening members such as screws to form a rectangular frame member. The frame member 1 has a U-shaped portion having a U-shaped cross section, which is composed of an upper surface portion (light-receiving surface side) 1a, a lower surface portion (back surface side) 1b, and a side surface portion 1c. The outer edge part of the solar cell panel 2 is covered over the entire periphery by the shape part. The frame member 1 is fixed to the solar cell panel 2 via a buffer material 3 such as a butyl sealant or a silicon adhesive. The frame member 1 reinforces the solar cell panel 2 and allows the solar cell panel 2 to be attached to a gantry (not shown) provided in a building such as a house or a building.

  A notch is provided at the center of the long bar member 1 </ b> A constituting the frame member 1. As shown in FIG. 3, the notch portions are provided by forming notches 1e and 1f by notching two opposing surfaces of the U-shaped portion to a position where the side surface portion 1c is left. In the present embodiment, the buffer material at the position where the notches 1e and 1f are formed is deleted, and a drainage channel that leads from the light receiving surface side to the back surface side is formed.

  FIG. 4 is a cross-sectional view of the end portion of the solar cell module for explaining how water accumulates on the light receiving surface. As shown in FIG. 4, the U-shaped portion provided in the frame member 1 has a U-shaped cross section, and the frame member 1 is attached to the solar cell panel 2 via the buffer material 3. If the solar cell module is disposed on the lower side of the frame member cross section, water is blocked by the upper surface portion 1a of the frame member 1 when it rains, and a water pool W is formed.

  On the other hand, the solar cell module 100 of the present embodiment is provided with notches 1e and 1f for draining water accumulated on the light receiving surface. As shown in FIG. 3, the cross-sections of the notches 1 e and 1 f have the upper surface portion 1 a and the lower surface portion 1 b of the frame member 1, the side surface portion 1 c remains, and the buffer material 3 is not disposed. And a side surface portion 1c. Thereby, the rain water collected on the light receiving surface of the solar cell panel 2 is quickly drained from the light receiving surface side to the back surface side as indicated by an arrow J in the figure.

  The cutouts 1e and 1f of the present embodiment are formed by cutting out to a position where only the side surface portion 1c is left. However, the notches 1e and 1f are not limited to this, and the width of the remaining portions is the side surface. If it is formed by cutting out to a position that is equal to or less than the sum of the thickness of the portion 1c and the thickness of the buffer material 3, water can be flowed, so that a predetermined effect can be obtained. The cross-sectional shapes of the notches 1e and 1f may be such that the side surface portion 1c is further removed as shown in FIG.

  As described above, in the solar cell module 100 of the present embodiment, the cutouts 1e and 1f are pre-processed in advance in the frame member 1, and the solar cell module 100 is configured without disposing the buffer material 3 at the same position. And when installing the solar cell module 100, the drainage function to the back surface of the solar cell module is ensured by positioning the notches 1e and 1f on the inclined lower side. In addition, the drainage function becomes high by arranging the notches 1e and 1f at a plurality of locations. Further, the width of the notch 1b is preferably wide considering the drainage function, but it is desirable that the width of the notch 1b is about 10 mm in consideration of protection of wrinkles and the like with respect to the exposed portion of the transparent substrate end face. The additional machining of the notches 1e and 1f can be performed by a general and simple method such as press working or machining, and further, without changing the manufacturing process of the solar cell module 100, drainage to the back surface of the solar cell module at low cost. Functions can be introduced. When the buffer material 3 is thin, the gap between the solar cell panel 2 and the side surface portion 1c is narrowed, so that there is a possibility that water cannot be drained to the back surface of the solar cell module. By making the shape by further removing the side surface portion 1c corresponding to 1f, the gap becomes larger and the drainage channel can be secured. Since the processing for removing the side surface portion 1c can be performed by a general and simple method such as pressing or machining as described above, the shape with the side surface portion 1c removed can be introduced into the solar cell module 100 at low cost. .

Embodiment 2. FIG.
FIG. 6 is a front view of a second embodiment of the solar cell module according to the present invention. In FIG. 6, in the solar cell module 101 of the present embodiment, the frame member 1 includes a pair of opposed long bar members 1A and 1B and the long bar member 1A, as in the first embodiment. It is comprised from a pair of short bar member 1C, 1D connected between the both ends of 1B. The pair of long bar members 1A and 1B and the pair of short bar members 1C and 1D are connected to each other at right angles by fastening members such as screws to form a rectangular frame member.

  The notches 1e and 1f of the present embodiment are formed at both ends of the long bar members 1A and 1B. Therefore, the notches 1e and 1f are provided at all four corners of the rectangular frame member 1. Other configurations are the same as those of the first embodiment.

  The frame member 1 is cut at a predetermined length at the time of manufacture, and screw holes for mounting and parts that become an obstacle when assembling are processed. However, since the end of the frame member is often processed, By providing the notches 1e and 1f in the vicinity of the end of the bar member, it is formed in the same process as other processes, and the machining position of other processes is changed, so that the notch process is performed without changing the process process. Therefore, it is possible to introduce notch processing at a lower cost.

  In addition, when installing a solar cell module, one of the four corners may be lowered due to a slight inclination of the module, and water may easily collect in this corner. A drainage channel near the corner improves the drainage function. It is also effective against In addition, if a cutout is placed near the four corners of a rectangular solar cell module, any cutout will always be placed on the lower side of the module during installation. Therefore, it is not necessary to consider the notch position, and workability is improved.

  Note that the notches 1e and 1f are not limited to the strict four corners of the rectangular frame member 1, and a predetermined effect can be obtained if provided in the vicinity of the four corners.

Embodiment 3 FIG.
FIG. 7 is a sectional view of an end portion of the third embodiment of the solar cell module according to the present invention. FIG. 8 is a cross-sectional view of a cutout portion of a third embodiment of the solar cell module according to the present invention. 7 and 8, the frame member 11 according to the present embodiment includes a U-shaped portion having a U-shaped cross section including an upper surface portion (light receiving surface side) 11a, a lower surface portion (back surface side) 11b, and a side surface portion 11c. The U-shaped portion covers the outer edge of the solar cell panel 2 over the entire circumference. The frame member 11 is fixed to the solar cell panel 2 via a buffer material 3 such as a sealing material or an adhesive disposed in the U-shaped portion.

  The frame member 11 includes an extension portion 11h formed so that the side surface portion 11c of the U-shaped portion extends to the back surface side, and an inner flange portion 11j formed to extend inwardly from the extension portion 11h. Is provided. The notch portions are provided by forming notches 11e and 11f by notching two opposing surfaces of the U-shaped portion to a position where the side surface portion 11c is left. Other configurations are the same as those of the first embodiment. Even with the frame member 11 having such a configuration, substantially the same effect as that of the first embodiment can be obtained. In addition, as shown in FIG. 9, the cross-sectional shape of a notch part is good also as what remove | eliminated the side part 11c from what was shown in FIG.

  FIG. 10 is a cross-sectional view of a cutout portion showing still another example of the solar cell module of the present embodiment. In the cutout portion shown in FIG. 10, the upper surface portion 11a side is not cut out, and instead, the surface (lower surface) of the upper surface portion 11a facing the solar cell panel 2 is grooved 11d from the opening side to the position reaching the side surface portion 11c. Is formed. Even in such a structure, it is possible to form a drainage channel that leads from the light receiving surface side to the back surface side. By adopting such a structure, notches are not visible on the surface, and the design is improved. In addition, the structure which forms the groove | channel facing the solar cell panel 2 instead of a notch in the upper surface part side of a notch part in this way may be applied to the thing of Embodiment 1 and 2. FIG.

Embodiment 4 FIG.
FIG. 11: is sectional drawing of the edge part of Embodiment 4 of the solar cell module concerning this invention. FIG. 12 is a cross-sectional view of a cutout portion of a solar cell module according to Embodiment 4 of the present invention. 11 and 12, the frame member 11B of the present embodiment has an outer flange portion 11k that protrudes outward from the outer peripheral surface of the U-shaped portion in addition to the structure of the frame member 11 of the third embodiment. doing.

  The notch portions are formed by cutting away the two opposing surfaces of the U-shaped portion to a position where the side surface portions are left to form the notches 11e and 11f, and further removing the side surface portion 11c. Other configurations are the same as those of the third embodiment. Even with the frame member 11B having such a configuration, substantially the same effect as that of the third embodiment can be obtained.

Embodiment 5 FIG.
FIG. 13: is sectional drawing of the edge part of Embodiment 5 of the solar cell module concerning this invention. FIG. 14 is a cross-sectional view of a cutout portion of a fifth embodiment of the solar cell module according to the present invention. 13 and 14, the frame member 11C of the present embodiment is an extension portion 11h formed so that the side surface portion 11c of the U-shaped portion extends to the back surface side, as in the third embodiment. And an inner flange portion 11j formed inwardly extending from the extension portion 11h. The notch part is formed by notching the two opposite faces of the U-shaped part to the extent that the side part remains, thereby forming the notches 11e and 11f. In the frame member 11C of the present embodiment, a drain hole 11m is formed in the inner flange portion 11j at a position corresponding to the notch portion. Other configurations are the same as those of the third embodiment. In the frame member 11C having such a configuration, water does not accumulate in the inner flange portion 11j and can be drained well.

Embodiment 6 FIG.
FIG. 15: is sectional drawing of the edge part of Embodiment 6 of the solar cell module concerning this invention. FIG. 16: is sectional drawing of the notch part of Embodiment 6 of the solar cell module concerning this invention. 15 and 16, the frame member 21 according to the present embodiment includes a U-shaped portion having a U-shaped cross section that includes an upper surface portion (light receiving surface side) 21a, a lower surface portion (back surface side) 21b, and a side surface portion 21c. Over the entire circumference. For the purpose of increasing the strength of the frame, a hollow bag-shaped portion 21h is provided adjacent to the back side of the U-shaped portion. The frame member 21 covers the outer edge portion of the solar cell panel 2 over the entire circumference with this U-shaped portion, and the solar cell panel 2 via a buffer material 3 such as a sealing material or an adhesive disposed in the U-shaped portion. It is fixed to.

  The notch portions are formed by cutting away the two opposing surfaces of the U-shaped portion to leave the side surface portions to form the notches 21e and 21f, and further removing the side surface portion 21c. And the drain hole 21m is opened by the bag-like part 21h so that water may flow through the inside of the bag-like part 21h. In the frame member 21 having such a configuration, the bag-shaped portion 21h provided for reinforcement is used, and a drainage channel is formed inside the bag-shaped portion 21h. Can lead.

Embodiment 7 FIG.
FIG. 17: is sectional drawing of the edge part of Embodiment 7 of the solar cell module concerning this invention. FIG. 18 is a cross-sectional view of a cutout portion of a seventh embodiment of the solar cell module according to the present invention. 17 and 18, the frame member 11D of the present embodiment has a thicker side plate 11c than that of the third embodiment. In the frame member 11D according to the present embodiment, the thickness of the side surface portion 11c of the U-shaped portion is thicker than the thickness of the extension portion 11h. Although the cutouts 11e and 11f are formed by cutting out to the position where the side surface part is left, and the side surface part 11c is also removed, the frame member 11D of the present embodiment is the frame member of the third embodiment. Since the thickness of the side surface portion 11c is thicker than that of 11, the drainage channel formed between the frame member 11 (the upper end edge of the extension portion 11h) and the solar cell panel 2 when this is deleted is a large cross section. It is formed. Therefore, drainage can be performed more satisfactorily.

Embodiment 8 FIG.
FIG. 19 is a cross-sectional view of a solar cell module according to an eighth embodiment of the present invention. FIG. 20 is a cross sectional view showing another example of the solar cell module according to the eighth embodiment of the present invention . In FIG. 19, the solar cell module 102 has the same frame member 11B as that of the fourth embodiment. Then, the solar cell panel 2 is disposed so as to be bridged by the frame member 11B on the back surface of the solar cell panel 2 as a push-up structure that pushes the solar cell panel 2 upward so that the solar cell panel 2 is convex toward the light receiving surface. The reinforcing frame 7 includes a gap member 8B disposed between the solar cell panel 2 and the reinforcing frame 7.

  Even if the gap material does not project the solar cell panel 2 to the light surface side, as shown in FIG. 20, the solar cell panel 2 is pushed up so that the solar cell panel 2 does not become concave on the light receiving surface side ( If it is supported, a predetermined effect can be obtained. In the solar cell module 102 having such a configuration, the solar cell panel 2 is bent so as to protrude toward the light receiving surface, so that rainwater or the like is difficult to collect and is easily drained through the drainage channel.

  As described above, the solar cell module according to the present invention is useful for a solar cell module installed in a building such as a house, a building, or a factory. The effect is large in the solar cell module installed at.

It is a perspective view of Embodiment 1 of the solar cell module according to the present invention. It is a front view of Embodiment 1 of the solar cell module according to the present invention. It is arrow sectional drawing which followed the AA line which expanded the part enclosed with the dotted line of FIG. 2 which shows a mode that the notch part is provided in the U-shaped part of the frame member. It is sectional drawing of the solar cell module edge part for demonstrating a mode that water accumulates on the light-receiving surface. It is sectional drawing of the notch which shows the other example of Embodiment 1 of the solar cell module concerning this invention. It is a front view of Embodiment 2 of the solar cell module concerning this invention. It is sectional drawing of the edge part of Embodiment 3 of the solar cell module concerning this invention. It is sectional drawing of the notch part of Embodiment 3 of the solar cell module concerning this invention. It is sectional drawing of the notch which shows the other example of Embodiment 3 of the solar cell module concerning this invention. It is sectional drawing of the notch which shows the further another example of Embodiment 3 of the solar cell module concerning this invention. It is sectional drawing of the edge part of Embodiment 4 of the solar cell module concerning this invention. It is sectional drawing of the notch part of Embodiment 4 of the solar cell module concerning this invention. It is sectional drawing of the edge part of Embodiment 5 of the solar cell module concerning this invention. It is sectional drawing of the notch part of Embodiment 5 of the solar cell module concerning this invention. It is sectional drawing of the edge part of Embodiment 6 of the solar cell module concerning this invention. It is sectional drawing of the notch part of Embodiment 6 of the solar cell module concerning this invention. It is sectional drawing of the edge part of Embodiment 7 of the solar cell module concerning this invention. It is sectional drawing of the notch part of Embodiment 7 of the solar cell module concerning this invention. It is a cross-sectional view of Embodiment 8 of the solar cell module according to the present invention. It is a cross-sectional view which shows the other example of Embodiment 8 of the solar cell module concerning this invention.

Explanation of symbols

1, 11, 11B, 11C, 11D, 21 Frame member 1a, 11a, 21a Upper surface portion of frame member 1b, 11b, 21b Lower surface portion of frame member 1c, 11c, 21c Side surface portion of frame member 1e, 11e, 21e Frame member Notches 1f, 11f, 21f formed in the upper surface of the substrate 2 Notches formed in the lower surface of the frame member 2 Solar cell panel 3 Buffer material 4 Solar cell 7 Reinforcing frame 8, 8B Gap material 11h Extension of the frame member 11j Inner flange part of frame member 11k Outer flange part of frame member 11d Groove of frame member 11m, 21m Drain hole 21h Bag-like part 100, 101, 102 Solar cell module J Flow of water W Water collected

Claims (9)

A solar panel formed by arranging a plurality of solar cells;
A frame member that surrounds the outer edge of the solar cell panel over the entire circumference with a U-shaped portion having a U-shaped cross section;
It is a solar cell module having a cushioning material disposed in the U-shaped portion of the frame member and sandwiched over the entire periphery between the outer edge portion of the solar cell panel,
In at least one position of the frame member, a notch or a groove is formed on the two opposing surfaces of the U-shaped portion until the width of at least the remaining portion is equal to or less than the sum of the thickness of the side surface plate thickness and the cushioning material. By providing a notch, the buffer material at the position where the notch is provided is deleted, and a drainage channel that leads from the light receiving surface side to the back surface side is formed ,
The cutout portion is cut out to a position where two opposing surfaces of the frame member leave a side surface portion of the frame member . A solar panel formed by arranging a plurality of solar cells;
A frame member that surrounds the outer edge of the solar cell panel over the entire circumference with a U-shaped portion having a U-shaped cross section;
It is a solar cell module having a cushioning material disposed in the U-shaped portion of the frame member and sandwiched over the entire periphery between the outer edge portion of the solar cell panel,
In at least one place of the frame member, the surface of the upper surface portion facing the solar cell panel in the upper surface portion and the lower surface portion, from the opening side to the side surface portion, to the opposite surface of the facing surface A groove is formed at a depth that does not penetrate, and a notch or groove is formed to a position where the width of at least the remaining portion of the lower surface portion is equal to or less than the sum of the thickness of the side surface plate and the buffer material. The solar cell module is characterized in that a drainage passage is formed from the light receiving surface side to the back surface side by removing the buffer material at the position where the cutout portion is provided. The frame member is formed in a rectangular shape by connecting linear bar members constituting each side at right angles to each other, and the notch is provided at a corner of the rectangular frame member. The solar cell module according to claim 1 or 2 . The solar cell module according to claim 3 , wherein the notch is provided at all four corners of the rectangular frame member. The frame member is provided with an extension portion formed so that a side surface portion of the U-shaped portion extends to the back surface side, and an inner flange portion formed to extend inwardly from the extension portion. And the hole for draining is opened in the said inner flange part. The solar cell module of any one of Claim 1 to 4 characterized by the above-mentioned. The frame member is provided with a hollow bag-shaped portion adjacent to the back side of the U-shaped portion, and the bag-shaped portion is arranged so that water flows through the bag-shaped portion. The solar cell module according to any one of claims 1 to 4, wherein a water draining hole is opened. The frame member is provided with an extension portion formed such that the side surface portion of the U-shaped portion extends to the back surface side, and the thickness of the side surface portion of the U-shaped portion is the thickness of the extension portion. the solar cell module according to any one of claims 1 to 6, wherein the thicker than. The solar cell module according to any one of claims 1 to 7 , further comprising a push-up structure that pushes up the solar cell panel so that the solar cell panel does not become concave on the light receiving surface side. The push-up structure is
A reinforcing frame disposed on the back surface of the solar cell panel;
A gap member disposed between the solar cell panel and the reinforcing frame;
The solar cell module according to claim 8 , wherein the gap material pushes up the solar cell panel so as to protrude toward the light receiving surface.

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