JP2013038321A - Solar cell module - Google Patents

Abstract

Provided is a solar cell module that is lightweight and excellent in moisture resistance.
A solar cell module includes a solar cell, a light-receiving surface side protection member, and a back surface side protection member. The solar cell 10 has a light receiving surface 10a and a back surface 10b. The light receiving surface side protection member 11 is disposed on the light receiving surface 10 a side of the solar cell 10. The back surface side protection member 12 is arranged on the back surface 10 b side of the solar cell 10. The light-receiving surface side protection member 11 is configured by a laminate including a glass layer and a resin layer.
[Selection] Figure 1

Description

  The present invention relates to a solar cell module.

  In recent years, attention has been paid to solar cell modules as an energy source with a small environmental load. For example, as described in Patent Document 1, in a solar cell module, a solar cell that easily deteriorates due to moisture is provided in a filler layer disposed between a light-receiving surface side protection member and a back surface side protection member. . Patent Document 1 describes that the light-receiving surface side protection member is made of a glass plate, and the back surface side protection member is made of a laminate of a flexible plate glass and a PVF film. In patent document 1, the moisture resistance of a solar cell module can be improved, suppressing the weight increase of a solar cell module by comprising a back surface side protection member with the laminated body of a flexible plate glass and a PVF film. The effect is described.

JP 2001-244486 A

  However, the solar cell module described in Patent Document 1 has a problem that it is difficult to reduce the weight of the solar cell module sufficiently.

  The objective of this invention is providing the solar cell module excellent in moisture resistance, while being lightweight.

  The solar cell module according to the present invention includes a solar cell, a light-receiving surface side protection member, and a back surface side protection member. The solar cell has a light receiving surface and a back surface. The light receiving surface side protection member is arranged on the light receiving surface side of the solar cell. The back surface side protection member is arranged on the back surface side of the solar cell. The light-receiving surface side protection member is comprised by the laminated body containing a glass layer and a resin layer.

  ADVANTAGE OF THE INVENTION According to this invention, while being lightweight, the solar cell module excellent in moisture resistance can be provided.

1 is a schematic cross-sectional view of a solar cell module according to an embodiment of the present invention. It is a schematic sectional drawing of the light-receiving surface side protection member in one Embodiment of this invention. It is a schematic sectional drawing of the light-receiving surface side protection member which concerns on a 1st modification. It is a schematic sectional drawing of the light-receiving surface side protection member which concerns on a 2nd modification. It is a schematic sectional drawing of the light-receiving surface side protection member which concerns on a 3rd modification.

  Hereinafter, an example of the preferable form which implemented this invention is demonstrated. However, the following embodiment is merely an example. The present invention is not limited to the following embodiments.

  Moreover, in each drawing referred in embodiment etc., the member which has a substantially the same function shall be referred with the same code | symbol. The drawings referred to in the embodiments and the like are schematically described, and the ratio of the dimensions of the objects drawn in the drawings may be different from the ratio of the dimensions of the actual objects. The dimensional ratio of the object may be different between the drawings. The specific dimensional ratio of the object should be determined in consideration of the following description.

(First embodiment)
As shown in FIG. 1, the solar cell module 1 of the present embodiment includes a plurality of solar cells 10. The plurality of solar cells 10 are electrically connected by the wiring member 30. The solar cell 10 includes a light receiving surface 10a and a back surface 10b. Here, the light receiving surface 10a is a surface that mainly receives light. The solar cell 10 may be one that generates power only when it receives light on the light receiving surface 10a, or a double-sided light receiving solar cell that generates power not only when it receives light on the light receiving surface 10a but also when it receives light on the back surface 10b. There may be. In addition, the kind of solar cell 10 is not specifically limited. The solar cell 10 may be a crystalline silicon solar cell, a thin film solar cell, or the like.

  On the light receiving surface 10 a side of the solar cell 10, a light receiving surface side protection member 11 is disposed. On the other hand, a back surface side protective member 12 is disposed on the back surface 10 b side of the solar cell 10. A filler layer 13 is disposed between the light receiving surface side protection member 11 and the back surface side protection member 12. The plurality of solar cells 10 are sealed with the filler layer 13. The filler layer 13 can be made of, for example, a resin such as an ethylene / vinyl acetate copolymer (EVA), polyvinyl butyral (PVB), polyethylene (PE), or polyurethane (PU).

  As shown in FIG. 2, the light-receiving surface side protection member 11 is configured by a laminate 20 in which a glass layer 21 and a resin layer 22 are laminated in this order on a filler layer 13. For this reason, the light-receiving surface side protection member 11 has a low water vapor transmission rate while being lightweight. Therefore, it is possible to obtain a solar cell module 1 that is lightweight and excellent in moisture resistance.

From the viewpoint of more lightweight solar cell module 1, the total thickness _{t 0} ratio of the thickness _{t 1} of the resin layer 22 for the laminate 20 ((the thickness _t 1 of the resin layer 22) / (total thickness of the laminate 20 t ₀ )) is preferably 0.1 or more, and more preferably 0.5 or more. Preferably the ratio of the thickness _{t 2} of the glass layer 21 to the total thickness _{t 0} of the stacked body 20 ((the total thickness _t 0 of the thickness _t 2) / (laminate 20 of the glass layer 21)) is 0.9 or less More preferably, it is 0.5 or less. However, if (thickness t ₁ of resin layer 22) / (total thickness t ₀ of laminate 20) is too large and (thickness t ₂ of glass layer 21) / (total thickness t ₀ of laminate 20) is too small. The glass layer 21 may be easily broken. Therefore, (thickness t ₁ of resin layer 22) / (total thickness t ₀ of laminate 20) is preferably 0.95 or less. (Thickness t ₂ of glass layer 21) / (total thickness t ₀ of laminate 20) is preferably 0.05 or more. Specifically, the thickness t ₁ of the resin layer 22 is preferably 0.3 mm to 5.7 mm, and more preferably 4.2 mm to 5.7 mm. The thickness _{t 2} of the glass layer 21 is preferably 0.15Mm～5.4Mm, more preferably 0.15Mm～3mm.

  The resin layer 22 is preferably made of a resin having a low water vapor permeability, hydrolysis resistance, and little deterioration due to ultraviolet irradiation. Specifically, it is preferable that the resin layer 22 includes at least one resin selected from the group consisting of an acrylic resin, a polyethylene terephthalate resin, and a polyvinyl chloride resin.

  The resin layer 22 preferably contains an ultraviolet absorber. In this case, a benzotriazole compound, a benzophenone compound, a salicylate compound, a cyanoacrylate compound, a nickel compound, a triazine compound, or the like can be used as the ultraviolet absorber.

  Specifically, in the present embodiment, the laminate 20 includes a glass layer 21 disposed on the filler layer 13, a resin layer 22 disposed on the glass layer 21, and the glass layer 21 and the resin layer. The adhesive layer 23 is bonded to the adhesive layer 23. Thus, in this embodiment, since the outermost layer of the laminated body 20 is comprised by the resin layer 22, the glass layer by the external impact added to the glass layer 21, or the pressure at the time of lamination at the time of solar cell module creation The crack of 21 can be suppressed effectively. Moreover, even if the glass is broken, it is possible to prevent the broken pieces of glass from scattering.

  The adhesive layer 23 may be any material as long as it is transparent and can adhere the glass layer 21 and the resin layer 22, for example, a resin such as EVA, PVB, PE, PU, a modified silicon resin adhesive, an epoxy It can be comprised by the hardened | cured material of resin adhesives, such as a system adhesive.

  The structure of the back surface side protection member 12 is not specifically limited. The back surface side protection member 12 may be composed of a resin film or a resin film in which a metal layer is interposed, or may be composed of the laminate 20 like the light receiving surface side protection member 11. That is, both the light-receiving surface side protection member 11 and the back surface side protection member 12 may be constituted by the laminate 20.

  On each surface of the light-receiving surface side protection member 11 and the back surface side protection member 12, a reflection suppression layer may be disposed.

(First to third modifications)
The solar cell modules according to the first to third modifications differ in the configuration of the solar cell module 1 and the light receiving surface side protection member 11 of the above embodiment.

  In the first modification, as shown in FIG. 3, the laminate 20 constituting the light-receiving surface side protection member 11 includes a resin layer 22a disposed on the filler layer 13, and a resin layer 22a. And a glass layer 21a. The resin layer 22a and the glass layer 21a are bonded by an adhesive layer 23. Even in this case, a solar cell module that is lightweight and excellent in moisture resistance can be obtained as in the above embodiment. Moreover, since the outermost layer is the glass 21a, it is possible to improve the fire resistance of the solar cell module and to suppress the occurrence of scratches due to the laminated dust and the like. In addition, since the glass layer 21a is disposed on the filler layer 13 via the resin layer 22a, the glass layer 21a is prevented from being dissolved into a solar cell module of an alkali component such as sodium contained in the glass layer 21a. Can be improved.

In the first modification, the ratio of the thickness _{t 12} of the resin layer 22a to the total thickness _{t 0} of the stacked body 20 ((the thickness _t 12 of the resin layer 22a) / (total thickness _t 0 of the stacked body 20)), the It is preferably 0.1 to 0.95, and more preferably 0.1 to 0.5. The ratio of the thickness _{t 11} of the glass layer 21a to the total thickness _{t 0} of the stacked body 20 ((the total thickness _t 0 of the thickness _t 11) / (laminate 20 of the glass layer 21a)) is a 0.05 to 0.9 It is preferable that it is 0.5 to 0.9. The thickness _{t 12} of the resin layer 22a is preferably 0.3Mm～5.7Mm, and more preferably 0.3 mm to 3 mm. The thickness _{t 11} of the glass layer 21a is preferably 0.15Mm～5.4Mm, more preferably 1.5Mm～5.4Mm.

  In the second modification example, as shown in FIG. 4, the laminate 20 constituting the light-receiving surface side protection member 11 includes a first glass layer 21 b disposed on the filler layer 13, and a first glass layer 21 b. The resin layer 22b disposed on the glass layer 21b and the second glass layer 21c disposed on the resin layer 22b are provided. Each of the first and second glass layers 21 b and 21 c and the resin layer 22 b are bonded by an adhesive layer 23. Even in this case, a solar cell module that is lightweight and excellent in moisture resistance can be obtained as in the above embodiment. Moreover, weight reduction can be achieved by using a part as resin. Moreover, since the outermost layer is the second glass layer 21c, it is possible to improve the fire resistance of the solar cell module and to suppress the occurrence of scratches due to the laminated dust and the like. In the second modification, the resin layer is sandwiched between glass layers. Thereby, even if it is a case where glass is damaged, it can prevent that the fragment of glass is scattered. Furthermore, the strength against impact can be increased without using tempered glass.

In a second variant, the ratio of the thickness _{t 22} of the resin layer 22b to the total thickness _{t 0} of the stacked body 20 ((the total thickness _t 0 of the thickness _t 22) / (laminate 20 of the resin layer 22b)) is It is preferable that it is 0.2-0.8, and it is more preferable that it is 0.6-0.8. The first and second glass layer 21b to the total thickness _{t 0} of the stacked body 20, 21c ratio of the thickness _t 23 _{+ t 21} of ((the first and second glass layers 21b, 21c of the thickness _t 23 _{+ t} 21) / ( The total thickness t ₀ )) of the laminate 20 is preferably 0.2 to 0.8, and more preferably 0.2 to 0.4. The thickness _{t 23} of the first glass layer 21b is preferably 0.3Mm～2.4Mm, and more preferably 0.3 mm to 1 mm. The thickness _{t 22} of the resin layer 22b is preferably 0.3Mm～4.8Mm, more preferably 0.6Mm～4.2Mm. The thickness _{t 21} of the second glass layer 21c is preferably 0.3Mm～2.4Mm, and more preferably 0.3 mm to 2 mm.

  In the second modification in which the outermost layer is the second glass layer 21c, the thickness of the second glass layer 21c is larger than the thickness of the first glass layer 21b in order to increase the strength against impact. It is preferable.

  In the third modification example, as shown in FIG. 5, the laminate 20 constituting the light-receiving surface side protection member 11 includes a first resin layer 22 c disposed on the filler layer 13, and a first resin layer 22 c. A glass layer 21d disposed on the resin layer 22c and a second resin layer 22d disposed on the glass layer 21d. Each of the first and second resin layers 22 c and 22 d and the glass layer 21 d are bonded by an adhesive layer 23. Even in this case, a solar cell module that is lightweight and excellent in moisture resistance can be obtained as in the above embodiment. Further, by sandwiching the glass layer with the resin layer, the strength against impact can be increased. In addition, since the glass layer 21d is disposed on the filler layer 13 via the resin layer 22c, it is prevented from being dissolved into the solar cell module of an alkaline component such as sodium contained in the glass layer 21c. Can be improved.

In the third modification, the ratio of the thickness t ₃₃ + t ₃₁ of the first and second resin layers 22c, 22d to the total thickness t ₀ of the laminate 20 ((the first and second resin layers 22c, 22d The thickness t ₃₃ + t ₃₁ ) / (total thickness t ₀ of the laminate 20)) is preferably 0.1 to 0.95, and more preferably 0.25 to 0.95. The ratio of the thickness _{t 32} of the glass layer 21d to the total thickness _{t 0} of the stacked body 20 ((the total thickness _t 0 of the thickness _t 32) / (stack 20 of glass layer 21d)) is a 0.05 to 0.9 It is preferable that it is 0.05 to 0.75. The thickness _{t 33} of the first resin layer 22c is preferably 0.15Mm～2.35Mm, more preferably 0.375Mm～2.85Mm. The thickness _{t 32} of the glass layer 21d is preferably 0.15Mm～5.4Mm, more preferably 0.15Mm～4.5Mm. The thickness t ₃₁ of the second resin layer 22d is preferably 0.15 mm to 2.35 mm, and more preferably 0.375 mm to 2.85 mm.

  In addition, you may comprise the back surface side protection member 12 by the laminated body 20 in a 1st-3rd modification.

  The present invention includes various embodiments not described herein. For example, the glass layers 21 and 21a to 21d may be configured by a laminated body of a plurality of glass layers. In this case, the adjacent glass layers may be bonded by an adhesive such as a resin adhesive. The resin layers 22 and 22a to 22d may be configured by a laminate of a plurality of resin layers. In this case, the adjacent resin layers may be bonded by an adhesive such as a resin adhesive.

  The laminate including at least one glass layer and at least one resin layer may be integrated without using an adhesive, for example, by a method such as molding.

  The solar cell module may have one solar cell.

  The adhesive surface of the resin layer may be embossed.

  As described above, the present invention includes various embodiments not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

DESCRIPTION OF SYMBOLS 1 ... Solar cell module 10 ... Solar cell 10a ... Light-receiving surface 10b ... Back surface 11 ... Light-receiving surface side protection member 12 ... Back surface side protection member 13 ... Filler layer 20 ... Laminated body 21,21a-21d ... Glass layers 22, 22a- 22d ... resin layer 23 ... adhesive layer 30 ... wiring material

Claims (11)

A solar cell having a light receiving surface and a back surface;
A light-receiving surface side protection member disposed on the light-receiving surface side of the solar cell;
A back surface side protective member disposed on the back surface side of the solar cell;
With
The said light-receiving surface side protection member is a solar cell module comprised by the laminated body containing a glass layer and a resin layer.   2. The solar cell module according to claim 1, wherein a ratio of a thickness of the resin layer to a total thickness of the laminate ((thickness of resin layer) / (total thickness of laminate)) is 0.1 or more.   The solar cell module according to claim 1 or 2, wherein the resin layer has a thickness of 0.3 mm to 5.7 mm.   The solar cell module according to any one of claims 1 to 3, wherein the glass layer has a thickness of 0.15 mm to 5.4 mm.   The solar cell module according to any one of claims 1 to 4, wherein the resin layer includes at least one resin selected from the group consisting of an acrylic resin, a polyethylene terephthalate resin, and a polyvinyl chloride resin.   The said resin layer is a solar cell module as described in any one of Claims 1-5 containing a ultraviolet absorber.   The solar cell module as described in any one of Claims 1-6 comprised by the laminated body in which the said back surface side protection member contains a glass layer and a resin layer.   At least one of the light receiving surface side protection member and the back surface side protection member is composed of a glass layer disposed on the filler layer and a resin layer disposed on the glass layer. The solar cell module as described in any one of Claims 1-7.   At least one of the light receiving surface side protection member and the back surface side protection member is configured by a resin layer disposed on the filler layer and a glass layer disposed on the resin layer. The solar cell module as described in any one of Claims 1-7.   At least one of the light-receiving surface side protection member and the back surface side protection member includes a first glass layer disposed on the filler layer, and a resin layer disposed on the first glass layer, The solar cell module as described in any one of Claims 1-7 comprised by the 2nd glass layer distribute | arranged on the said resin layer.   At least one of the light-receiving surface side protection member and the back surface side protection member includes a first resin layer disposed on the filler layer, and a glass layer disposed on the first resin layer. The solar cell module as described in any one of Claims 1-7 comprised by the 2nd resin layer distribute | arranged on the said glass layer.

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