JP2022011093A - Solar cell module and mounting structure of solar cell module - Google Patents

Abstract

To provide a solar cell module capable of suppressing degradation caused by liquid.SOLUTION: A solar cell module 100 for standing comprises a photoelectric conversion element, a first substrate 600 provided on the first side of the photoelectric conversion element, and a protective material 900 provided on the second side opposite to the first substrate 600 with respect to the photoelectric conversion element and covering the photoelectric conversion element. In the state in which the solar cell module 100 is erected, the lower edge of the protective material 900 is located above the lower edge of the first substrate 600.SELECTED DRAWING: Figure 3

Description

The present invention relates to a solar cell module and a mounting structure of the solar cell module.

Solar cell modules are installed on the roofs of buildings or on the ground of large sites. In addition, the solar cell module may be installed on the wall surface of the building.

Patent Document 1 discloses a wall mounting structure for mounting a solar cell module (panel body) on a wall surface. In Patent Document 1, an upper locking portion is formed at the upper end of the erected panel body, and a lower locking portion is formed at the lower end of the panel body. In addition, a plurality of cross rails are installed on the wall surface. The cross rails are arranged side by side in the upper and lower tiers in a substantially horizontal direction, and the back surface side and the wall surface of the cross rails are fixed. The cross rail has an upper locking portion receiving portion that engages with the upper locking portion of the panel body and a lower locking portion receiving portion that engages with the lower locking portion of the panel body. As a result, the panel body is installed on the wall surface by the upper cross rail and the lower cross rail.

In Patent Document 1, the cross rails that support the lower end of the panel body include a lower portion that supports the panel body from below and extends in a substantially horizontal direction, and a contact portion that extends upward from the lower portion and is in contact with the wall surface. It has a substantially L-shaped shape. The panel body is placed on the lower part of the cross rail. Therefore, a concave portion recessed downward is formed by the substantially L-shaped cross rail and the panel body.

Japanese Unexamined Patent Publication No. 2019-183458

The inventor of the present application has found that the following problems arise when the wall-mounted structure described in Patent Document 1 is applied to a solar cell module. First, a liquid such as rainwater may collect in the above-mentioned recess formed by the substantially L-shaped cross rail and the solar cell module. The liquid accumulated in the recess continues to come into contact with the vicinity of the lower end on the back side of the solar cell module. Therefore, if there is a member on the back side of the solar cell module that is easily deteriorated by the liquid, the deterioration of the solar cell module may be accelerated.

Therefore, an upright solar cell module capable of suppressing deterioration due to liquid and a mounting structure for the solar cell module are desired.

The erection solar cell module according to one embodiment has a photoelectric conversion element, a first substrate provided on the first surface side of the photoelectric conversion element, and a second substrate opposite to the first substrate with respect to the photoelectric conversion element. It has a protective material provided on the two-sided side and covering the photoelectric conversion element. In the state where the solar cell module is erected, the lower end of the protective material is located above the lower end of the first substrate.

The mounting structure of the solar cell module according to one aspect includes the above-mentioned solar cell module and a lower support tool for supporting the solar cell module from below in an upright state. The lower support has a loading surface that supports the solar cell module from below, and a base portion that extends upward from the loading surface on the back surface side of the solar cell module. The lower end of the protective material is located above the upper end of the base.

The mounting structure of the solar cell module according to another aspect includes the above-mentioned solar cell module and a fastening member for mounting the solar cell module in an upright state to an installation portion. The fastening member penetrates the first substrate of the solar cell module and is attached to the installation portion. The fastening member is provided in a region displaced from the protective material when viewed from a direction orthogonal to the surface of the solar cell module.

According to the above aspect, it is possible to provide a solar cell module capable of suppressing deterioration due to a liquid, and a mounting structure for the solar cell module.

It is a top view of the mounting structure of the solar cell module which concerns on 1st Embodiment. It is a side view of the mounting structure of the solar cell module seen from the direction of arrow 2A of FIG. It is an enlarged view of the area 3R of FIG. It is an enlarged perspective view of the area 3R of FIG. It is a top view of the back surface side of the solar cell module which concerns on 1st Embodiment. It is sectional drawing which follows the 6A-6A line of FIG. It is a top view of the mounting structure of the solar cell module which concerns on 2nd Embodiment. It is a partially enlarged side view of the mounting structure of the solar cell module which concerns on 3rd Embodiment.

Hereinafter, embodiments will be described with reference to the drawings. In the following drawings, the same or similar parts are designated by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratio of each dimension may differ from the actual one.

(First Embodiment)
FIG. 1 is a plan view of the mounting structure of the solar cell module according to the first embodiment. FIG. 2 is a side view of the mounting structure of the solar cell module seen from the direction of arrow 2A in FIG. FIG. 3 is an enlarged view of the area 3R of FIG. FIG. 4 is an enlarged perspective view of the area 3R of FIG. FIG. 5 is a plan view of the back surface side of the solar cell module according to the first embodiment. FIG. 6 is a cross-sectional view taken along the line 6A-6A of FIG.

The solar cell module mounting structure according to the first embodiment includes a solar cell module 100 and a fixture that supports the solar cell module 100 on an erected installation surface 80. The installation surface 80 is not particularly limited as long as it can be installed in a state where the solar cell module 100 is upright. The installation surface 80 may be, for example, a wall surface of a building. The building may be a building, a soundproof wall, or the like.

Here, the erected installation surface 80 is not limited to the installation surface erected in the direction orthogonal to the horizontal plane, that is, the installation surface erected along the vertical direction, and includes the installation surface erected inclining from the vertical direction. Please note.

Fixtures that support the solar cell module 100 include an upper support 20 that supports the solar cell module 100 and a lower support 40 that supports the solar cell module 100 and is located below the upper support 20. You may have.

The upper support 20 is attached to the installation surface 80 and may extend along a substantially horizontal direction. The upper support 20 has a first portion that engages with a base portion 21 facing the installation surface 80, a connecting portion 22 continuously extending from the base portion 21 in a direction away from the installation surface 80, and the upper end of the solar cell module 100. It may have an engaging portion 24 and.

The base 21 may be in contact with the installation surface 80. The upper support 20 may be fixed to the installation surface 80 at the base 21, for example, by a fastening member (not shown) such as a bolt.

The first engaging portion 24 may be composed of a portion of the connecting portion 22 that is bent downward from an end portion opposite to the installation surface 80. The first engaging portion 24 covers the vicinity of the upper end on the surface side of the solar cell module 100. In other words, the upper end portion of the solar cell module 100 is sandwiched between the installation surface 80 or the base portion 21 and the first engaging portion 24. This prevents the solar cell module 100 from falling off.

The lower support 40 is attached to the installation surface 80 and may extend along a substantially horizontal direction. The lower support 40 engages with a base 41 facing the installation surface 80, a connecting portion 42 continuously extending from the base 41 in a direction away from the installation surface 80, and a lower end of the solar cell module 100. It may have 2 engaging portions 44 and.

The base 41 may be in contact with the installation surface 80. The lower support 40 may be fixed to the installation surface 80, for example, at the base 41 by a fastening member 46 such as a bolt (see FIG. 3). The connecting portion 42 constitutes a loading surface 43 that supports the solar cell module 100 from below. The base 41 may be configured by at least an upwardly bent portion between the solar cell module 100 and the installation surface 80.

The second engaging portion 44 may be composed of a portion of the connecting portion 42 that is bent upward from an end portion opposite to the installation surface 80. The second engaging portion 44 covers the vicinity of the lower end on the surface side of the solar cell module 100. In other words, the lower end portion of the solar cell module 100 is sandwiched between the installation surface 80 or the base portion 41 and the second engaging portion 44. This prevents the solar cell module 100 from falling off.

In FIG. 1, the upper support 20 and the lower support 40 support only one solar cell module 100. Instead, the upper support 20 and the lower support 40 may support a plurality of solar cell modules 100 arranged side by side. In this case, the upper support 20 and the lower support 40 may extend long over the plurality of solar cell modules 100.

Next, the configuration of the solar cell module 100 will be described with reference to FIGS. 5 and 6. The solar cell module 100 in the present embodiment can be suitably used as an upright solar cell module installed in an upright state.

The solar cell module 100 includes a photoelectric conversion element 10, a first substrate 600 provided on the front surface side (first surface side) of the photoelectric conversion element 10, and a photoelectric conversion element 10 on the opposite side (back surface side) of the first substrate 600. It may have a sheet-shaped protective material 900 provided on the side).

Here, the "surface side" corresponds to the side where light is incident on the photoelectric conversion element 10. Further, the "back surface side" corresponds to the surface opposite to the front surface side.

The first substrate 600 may be exposed on the surface side. The first substrate 600 may be a transparent or translucent substrate such as a resin substrate or a glass substrate. The first substrate 600 may be made of a material having higher durability against moisture than the protective material 900 described later. In the present embodiment, the first substrate 600 is composed of plywood formed by joining the front surface side substrate 600a and the back surface side substrate 600b to each other. Instead of this, the first substrate 600 may be composed of one plate material instead of plywood.

In the plane along the surface of the first substrate 600, the size of the first substrate 600 is larger than the size of the photoelectric conversion element 10 described later, more specifically, the size of the second substrate 700. The solar cell module 100 does not have to have a frame member around the first substrate 600.

The solar cell module 100 may have a first sealing layer 400 between the first substrate 600 and the photoelectric conversion element 10. The first sealing layer 400 may cover at least the surface side of the photoelectric conversion element 10.

The first sealing layer 400 may be composed of a transparent or translucent insulator. For example, the first sealing layer 400 may be formed of a synthetic resin. As such a synthetic resin, for example, EVA resin (ethylene / vinyl acetate copolymer resin), olefin resin, PVB (polyvinyl butyral) resin, ionomer resin or silicone resin, or a combination thereof can be used.

The photoelectric conversion element 10 may be provided in a layer on the second substrate 700. The photoelectric conversion element 10 may be formed over almost the entire area of the second substrate 700. The second substrate 700 is a portion that serves as a substrate that forms the photoelectric conversion element 10. The second substrate 700 may be composed of, for example, a resin substrate, a glass substrate, or a metal substrate. An insulating layer (not shown) may be formed on the surface of the second substrate 700 on the photoelectric conversion element 10 side.

The solar cell module 100 may have a second sealing layer 800 between the second substrate 700 and the protective material 900. The second sealing layer 800 may be formed of an insulator such as a synthetic resin. As such a synthetic resin, for example, EVA resin (ethylene / vinyl acetate copolymer resin), olefin resin, PVB (polyvinyl butyral) resin, ionomer resin or silicone resin, or a combination thereof can be used. The thickness of the second sealing layer 800 may be the same as or different from the thickness of the first sealing layer 400.

The protective material 900 may cover the photoelectric conversion element 10 and the second substrate 700 on the back surface side of the solar cell module 100. In the plane along the surface of the second substrate 700, the size of the protective material 900 may be larger than the size of the second substrate 700. The edge of the protective material 900 may extend to or near the back surface of the first substrate 600 at the side portion of the photoelectric conversion element 10. The protective material 900 may be located on the backmost side of the solar cell module 100.

The protective material 900 may contain at least a resin. The protective material 900 may be, for example, a laminated sheet in which a resin base material and an adhesive are laminated on each other. The protective material 900 may be composed of, for example, a PET resin, a PVF (polyvinyl fluoride) resin, a PVDF (polyvinylidene fluoride) resin, a nylon resin or a polyamide resin, or a combination thereof.

The solar cell module 100 may have a sealing material 500 on the side portion of the photoelectric conversion element 10. The sealing material 500 surrounds the peripheral portions of the photoelectric conversion element 10 and the second substrate 700, and may be attached to the back surface side of the first substrate 600. The sealing material 500 is inclined so as to gently connect one surface on the back surface side of the second sealing material 800 and one surface on the back surface side of the first substrate 600 in a cross section on a surface orthogonal to the front surface of the solar cell module 100. It may be (Fig. 6).

The sealing material 500 is preferably made of a material having higher moisture resistance than the material constituting the protective material 900. Examples of the material of such a sealing material 500 include polyisobutylene (PIB), butyl rubber or synthetic rubber, or a combination thereof. As a result, the intrusion of moisture from the side portion of the photoelectric conversion element 10 can be prevented, and deterioration of the photoelectric conversion element 10 can be suppressed.

In the present embodiment, the edge of the protective material 900 is located inside the edge of the first substrate 600. More specifically, in the state where the solar cell module 100 is erected, the lower end of the protective material 900 is located above the lower end of the first substrate 600. Therefore, the lower end of the first substrate 600 comes into contact with the loading surface 43 of the lower support 40, but the protective material 900 is located above the loading surface 43 of the lower support 40. Therefore, even if a liquid such as rainwater collects on the loading surface 43 of the lower support 400, it is possible to prevent the protective material 900 from coming into contact with the liquid.

In particular, the protective material 900 may be composed of a resin sheet as described above. When such a resin sheet is immersed in a liquid for a long period of time, deterioration is likely to be accelerated. In the present embodiment, since the protective material 900 is located above the loading surface 43 of the lower support 40, even if the liquid collects on the loading surface 43, the protective material 900 is unlikely to come into contact with the liquid. Therefore, deterioration of the protective material 900, that is, deterioration of the solar cell module can be suppressed.

From the viewpoint of preventing contact with the liquid accumulated on the loading surface 43, the distance L1 between the lower end 900a of the protective material 900 and the lower end 600e of the first substrate 600 may be preferably 1 cm or more, more preferably 3 cm or more. ..

Further, as shown in FIG. 5, it is more preferable that all the ends of the protective material 900 are located inside the ends of the first substrate 600. As a result, the liquid accumulated on the loading surface 43 of the lower support 40 is less likely to come into contact with the protective material 900 regardless of the orientation of the solar cell module 100. In this case, all the ends of the protective material 900 may be separated from the end of the first substrate 600 by preferably 1 cm or more, more preferably 3 cm or more.

Further, with the solar cell module 100 installed, the lower end 900a of the protective material 900 is preferably located above the upper end 41a of the base 41 of the lower support 40. Since a liquid such as rainwater can collect up to the upper end of the base 41 of the lower support 40, the lower end of the protective material 900 is located above the upper end of the base 41 of the lower support 40, so that the protective material 900 is located. Is less likely to come into contact with the liquid.

The composition or type of the photoelectric conversion element 10 is not particularly limited. The photoelectric conversion element 10 may be, for example, a so-called thin film type photoelectric conversion element. Examples of the thin film type photoelectric conversion element include a so-called CIS-based photoelectric conversion element, a CdTe-based photoelectric conversion element, and an amorphous silicon-based photoelectric conversion element. Instead, the photoelectric conversion element 10 may be, for example, a so-called crystalline photoelectric conversion element using single crystal silicon or polycrystalline silicon.

In order to change the appearance of the solar cell module 100 from the front surface side, at least one or both of the front surface and the back surface of the first substrate 600 may be surface-treated. The surface treatment may be, for example, light diffusion printing, blast treatment, frost treatment, or a combination thereof. Further, the appearance of the glass constituting the first substrate 600 may be changed by a so-called roll-out manufacturing method in which a pattern is formed by passing a glass melting cloth between the roll having a pattern and the roll having no pattern.

When the first substrate 600 is composed of plywood formed by joining the front surface side substrate 600a and the back surface side substrate 600a to each other, the above-mentioned surface treatment is performed on the front surface side substrate 600a and the back surface side substrate 600b. It may be formed on either one of them, or may be formed on both of them. The type of surface treatment applied to the front surface side substrate 600a and the back surface side substrate 600a may be the same type of treatment method or different types of treatment methods.

By variously changing the types of surface treatments and their combinations, the appearance of the solar cell module 100 as seen from the surface side can be variously changed.

By appropriately setting the area of the first substrate 600 to be surface-treated, it is possible to make figures and patterns appear on the surface of the solar cell module 100. For example, if surface treatment is applied only to the outer peripheral portion of the first substrate 600 or only the central portion excluding the outer peripheral portion of the first substrate 600, the appearance as if a frame exists around the solar cell module 100 can be obtained. can.

(Second Embodiment)
Next, the mounting structure of the solar cell module according to the second embodiment will be described. FIG. 7 is a plan view of the mounting structure of the solar cell module according to the second embodiment. In FIG. 7, the region where the protective material 900 exists is shown by a dotted line for convenience. It should be noted that in the second embodiment, the same reference numerals are given to the same configurations as those in the first embodiment. Further, it should be noted that the description of the same configuration as that of the first embodiment may be omitted below.

In the second embodiment, the configuration of the solar cell module 100 is the same as that in the first embodiment. In the second embodiment, the solar cell module 100 is mounted on an installation surface such as a wall surface as in the first embodiment. The solar cell module 100 is attached to an installation portion attached to the installation surface.

The installation portion may have a plurality of vertical members 92 extending in the substantially height direction and a plurality of horizontal members 94 extending in the substantially horizontal direction. The vertical member 92 and the horizontal member 94 may be made of, for example, wood. The vertical member 92 and the horizontal member 94 may be attached to an installation surface such as a wall surface by a fastening member (not shown) such as a bolt.

The plurality of vertical members 92 and the plurality of horizontal members 94 form a frame for mounting the solar cell module 100. In the second embodiment, the solar cell module 100 is attached to the installation portion by a fastening member 96 such as a bolt, a screw, or a nail. Specifically, the solar cell module 100 is attached to at least one of the vertical member 92 and the horizontal member 94 by the fastening member 96. As shown in FIG. 7, a plurality of fastening members 96 are provided near the end of the solar cell module 100.

In the second embodiment, each fastening member 96 penetrates the first substrate 600 of the solar cell module 100 and is attached to the vertical member 92 or the horizontal member 94. The fastening member 96 is provided in a region displaced from the protective material 900 when viewed from a direction orthogonal to the surface of the solar cell module 100. That is, the fastening member 96 penetrates the first substrate 600, but does not penetrate the protective material 900.

In the second embodiment, the solar cell module 100 is attached to the installation portion by the fastening member 96 penetrating the first substrate 600. Therefore, a liquid such as rainwater does not collect near the lower end of the solar cell module 100. Therefore, it is possible to prevent the protective material 900 from continuing to come into contact with the liquid for a long period of time.

Further, since the fastening member 96 does not penetrate the protective material 900, it is possible to prevent the photoelectric conversion element 10 existing inside the protective material 900 from being deteriorated by moisture.

In the second embodiment, the surface treatment may be applied to the first substrate 600 as in the first embodiment. In the second embodiment, the surface treatment may be applied only to the outer peripheral portion of the first substrate 600 or only the central portion excluding the outer peripheral portion of the first substrate 600. In this case, a virtual frame region having a different appearance is formed on the first substrate 600. This virtual frame area may be formed so as to be arranged outside the protective material 900 when viewed from the surface side of the solar cell module 100. In this case, since the virtual frame area corresponds to the area where the fastening member 900 may be penetrated, the builder can easily grasp the position where the fastening member 900 may be attached.

(Third Embodiment)
Next, the mounting structure of the solar cell module according to the third embodiment will be described. FIG. 8 is a partially enlarged side view of the mounting structure of the solar cell module according to the third embodiment. Specifically, FIG. 8 shows an enlarged area corresponding to FIG. 3 in the first embodiment. It should be noted that in the third embodiment, the same reference numerals are given to the same configurations as those in the first embodiment. Further, it should be noted that the description of the same configuration as that of the first embodiment may be omitted below.

In the third embodiment, the fixtures that support the solar cell module 100, that is, the upper support 20 and the lower support 40 are the same as those in the first embodiment. In the third embodiment, the configuration of the solar cell module 100 is different from that of the first embodiment.

The solar cell module 100 in the third embodiment has a frame 200 provided at least along the side of the lower end 600e of the first substrate 600 in a state where the solar cell module is erected. In FIG. 8, only the frame 200 provided along the side of the lower end 600e of the first substrate 600 is shown. Instead, the frame 200 may be arranged so as to substantially surround the edge of the first substrate 600.

The frame 200 may have a receiving portion 210 configured by a substantially C-shaped wall portion in a cross section orthogonal to the extending direction (horizontal direction) of the frame 200. The edge of the first substrate 600 is inserted into the receiving portion 210. Further, the frame 200 may have a leg portion 220 extending toward the back surface side of the first substrate 600 and extending upward at a position away from the first substrate 600. As a result, the frame 200 may have a substantially E-shaped shape in a cross section orthogonal to the extending direction of the frame 200.

In the third embodiment, the lower end 900a of the protective material 900 is located above the upper end of the frame 200, specifically, the upper end 220e of the leg portion 220 in a state where the solar cell module 100 is erected.

Liquids such as rainwater tend to collect in the recesses between the solar cell module 100 and the legs 220 of the frame 200. Even if liquid collects in the recess between the solar cell module 100 and the leg 220 of the frame 200, the protective material 900 is located above the upper end 220e of the leg 220 because the lower end 900a of the protective material 900 is located above the upper end 220e of the leg 220. Can be prevented from staying in contact with the liquid for a long period of time.

When a large amount of liquid is poured on the back side of the solar cell module 100, the liquid also collects on the loading surface 43 of the lower support 400 as in the first embodiment. Therefore, as in the first embodiment, it is more preferable that the lower end 900a of the protective material 900 is located above the upper end 41a of the base 41 of the lower support 40 in the state where the solar cell module 100 is installed. ..

In the third embodiment, the solar cell module 100 is fixed in an upright state by the upper support tool 20 and the lower support tool 40 as in the first embodiment. Instead, the solar cell module 100 may be directly fixed to the installation surface 80 by a fastening member such as a bolt. In this case, the fastening member may be fastened to the installation surface 80 through, for example, the frame 200.

As mentioned above, the content of the invention has been disclosed through a plurality of embodiments, but the statements and drawings that form part of this disclosure should not be understood to limit the invention. This disclosure reveals to those skilled in the art various alternative embodiments, examples and operational techniques. Therefore, the technical scope of the present invention is defined only by the matters specifying the invention relating to the reasonable claims from the above description.

40 Lower support 43 Loading surface 80 Installation surface 92 Vertical material 94 Horizontal material 96 Fastening member 100 Solar cell module 200 Frame 600 First board 900 Protective material

Claims (5)

It is a solar cell module for standing,
Photoelectric conversion element and
A first substrate provided on the first surface side of the photoelectric conversion element and
The photoelectric conversion element is provided on the second surface side opposite to the first substrate, and has a protective material for covering the photoelectric conversion element.
A solar cell module in which the lower end of the protective material is located above the lower end of the first substrate in a state where the solar cell module is erected. The solar cell module according to claim 1, wherein all the ends of the protective material are located inside the edges of the first substrate. In the state where the solar cell module is erected, it has a frame provided at least along the lower end side of the first substrate.
The frame extends upward at a position away from the first substrate on the second surface side of the first substrate in a state where the solar cell module is erected.
The solar cell module according to claim 1 or 2, wherein the lower end of the protective material is located above the upper end of the frame when the solar cell module is erected. The solar cell module according to any one of claims 1 to 3.
It has a lower support that supports the solar cell module from below in an upright state, and has.
The lower support has a loading surface that supports the solar cell module from below, and a base portion that extends upward from the loading surface on the back surface side of the solar cell module.
A solar cell module mounting structure in which the lower end of the protective material is located above the upper end of the base. The solar cell module according to claim 1 or 2.
It has a fastening member for attaching the solar cell module to the installation portion in an upright state, and has.
The fastening member penetrates the first substrate of the solar cell module and is attached to the installation portion.
The fastening member is a solar cell module mounting structure provided in a region displaced from the protective material when viewed from a direction orthogonal to the surface of the solar cell module.

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