JP2011210861A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell module having improved reliability.SOLUTION: The solar cell module includes a resin substrate 2, having a translucent light receiving surface and a rear surface positioned on the rear side of the light receiving surface, and a solar cell string 7, which is arranged on the rear surface side of the resin substrate 2 and has an oblong connecting conductor 6 for electrically connecting a plurality of solar cell elements 5 and adjoining solar cell elements 5 together. Furthermore, the solar cell module includes a packing material 3 arranged between the resin substrate 2 and the solar cell string 7, and a glass fabric 4 arranged inside of at least one of the resin substrate 2 and the packing material 3. The glass fabric 4 of the solar cell module is so arranged that the length direction of the glass fabric 4 runs along the length direction of the connecting conductor 6.

Description

  The present invention relates to a solar cell module.

  In recent years, solar cell modules have been introduced from the viewpoint of environmental protection. In addition, some of such solar cell modules are configured using a flexible substrate such as a resin so as to be compatible with an installation surface having a curved shape. As an example of such a form, there is a solar cell module in which an amorphous silicon thin film or the like is laminated on a substrate of a heat resistant resin film such as polyimide and the back side is protected with an unsaturated polyester resin substrate. Moreover, in this resin substrate, the glass fiber was disperse | distributed for the purpose of making uniform the thermal expansion coefficient of each laminated body (for example, refer patent document 1).

JP 2002-246627 A

  However, in the solar cell module described in Patent Document 1, the glass fiber is merely dispersed in the resin substrate, and the arrangement of the glass fiber is not considered. Therefore, when such a technique is applied to a solar cell module having a super straight structure in which a plurality of solar cell elements are connected in series using a relatively thin elongated connection conductor, the resin changes depending on the temperature change. The thermal stress generated in the substrate could not be reduced sufficiently, and the connection conductor could break. Moreover, when the dispersion amount of the glass fiber is increased in order to further reduce the thermal stress, a part of incident light is blocked by the glass fiber, which may reduce the power generation efficiency.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a solar cell module having high reliability against temperature changes.

  The solar cell module of the present invention is translucent, and has a light receiving surface, a resin substrate having a back surface positioned on the back side of the light receiving surface, and is disposed on the back surface side of the resin substrate. And a solar cell string having a long connection conductor for electrically connecting the adjacent solar cell elements to each other. Furthermore, the solar cell module of the present invention comprises: a filler disposed between the resin substrate and the solar cell string; and a glass fiber disposed inside at least one of the resin substrate and the filler. Prepare. And the solar cell module of this invention WHEREIN: The said glass fiber is arrange | positioned so that the longitudinal direction of this glass fiber may follow the longitudinal direction of the said connection conductor.

  According to the solar cell module of the present invention, by arranging the glass fiber so that the longitudinal direction of the glass fiber disposed in at least one of the resin substrate and the filler is along the longitudinal direction of the connecting conductor, the resin substrate Therefore, the thermal stress transmitted to the connecting conductor and the solar cell element can be efficiently reduced with the glass fiber. As a result, in the solar cell module of the present invention, it is possible to reduce the occurrence of connection conductor breakage and cracking of the solar cell element caused by elongation along the longitudinal direction of the connection conductor due to thermal stress from the resin substrate accompanying temperature change. Can be improved.

The solar cell module which concerns on embodiment of this invention is shown, (a) is the top view seen from the light-receiving surface side, (b) is sectional drawing which looked at Fig.1 (a) in the AA 'cross section, (C) shows sectional drawing which looked at Fig.1 (a) in the BB 'cross section. It is a disassembled perspective view which shows the laminated structure of the solar cell module which concerns on embodiment of this invention. It is a model figure explaining the deformation | transformation by the thermal expansion inside the solar cell module which concerns on embodiment of this invention. It is drawing explaining other embodiment of the solar cell module of this invention, (a) shows the top view seen from the light-receiving surface side, (b) shows Fig.4 (a) in CC 'cross section. FIG. It is drawing explaining other embodiment of the solar cell module of this invention, (a) shows the top view seen from the light-receiving surface side, (b) shows Fig.5 (a) in DD 'cross section. FIG. It is drawing explaining other embodiment of the solar cell module of this invention, (a) shows the top view seen from the light-receiving surface side, (b) shows Fig.6 (a) in the EE 'cross section. FIG.

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

(First embodiment)
As shown in FIGS. 1 to 3, the solar cell module 1 </ b> A according to the first embodiment of the present invention corresponds to a resin substrate 2 that also serves as a substrate of the solar cell module 1 </ b> A in order from the light receiving surface side, and a filler. The light receiving surface side filler 3 and the glass fiber 4 disposed inside the light receiving surface side filler 3 are provided. Furthermore, the solar cell module 1A includes a plurality of solar cell elements 5 arranged on the back side of the resin substrate 2, a long connection conductor 6 formed by electrically connecting adjacent solar cell elements 5 to each other, Is provided. Further, the solar cell module 1A includes a non-light-receiving surface side filler 8 disposed at a portion located on the back surface of the solar cell string 7 on the light-receiving surface side, and a back surface protection material that protects the back surface of the non-light-receiving surface side filler 8 9 and a terminal box 10 which is bonded to the back surface protective material 9 and takes out the output to the outside.

  Next, members constituting the solar cell module 1A will be described.

<Resin substrate>
The resin substrate 2 has a light receiving surface on which light is mainly incident and a back surface to which the light receiving surface side filler 3 is bonded. Such a resin substrate 2 includes, for example, a synthetic resin such as a polycarbonate resin or an acrylic resin and has a light transmitting property. In addition, translucency refers to a property that allows sunlight incident from the light receiving surface to pass therethrough. Moreover, the shape of the resin substrate 2 is not limited to a flat plate shape having a flat surface, and may be a shape having a curved surface in accordance with the application. If the thickness of the resin substrate 2 is a flat plate, a synthetic resin having a thickness of about 3 mm to 8 mm can be used. The specific gravity of the polycarbonate resin and the acrylic resin is about 1.2, and the specific gravity of the glass is about 2.5. Therefore, if the synthetic resin mentioned above is used, the board | substrate itself can be reduced in weight compared with the board | substrate comprised with glass.

On the other hand, the thermal expansion coefficient of polycarbonate resin and acrylic resin is larger than that of glass. For example, the thermal expansion coefficient of hard glass is 8.5 × 10 ⁻⁶ / ° C., whereas the thermal expansion coefficients of polycarbonate resin and acrylic resin are 6 to 9 × 10 ⁻⁵ / ° C. For this reason, when comparing the length of thermal expansion per meter when the temperature change is 40 ° C. (hereinafter referred to as the thermal expansion length), the thermal expansion length of hard glass is about 0.34 mm, and the polycarbonate and The thermal expansion length of the acrylic resin is as large as 2.4 mm to 3.6 mm.

  Moreover, since the tensile elastic modulus of the synthetic resin such as polycarbonate resin or acrylic resin is 2000 to 3200 MPa, the vertical dimension × lateral dimension × thickness of the resin substrate is 150 mm × 150 mm × 5 mm, and the temperature change is 40 ° C. When there is a restraint of 0.01 mm for thermal expansion, a thermal stress of 99.8 to 160 N is generated. Thus, since the resin substrate 2 generally has a large thermal expansion, thermal stress is generated.

<Light receiving surface side filler>
The light receiving surface side filler 3 corresponding to the filler has a role of sealing the light receiving surface side of the solar cell string 7 from the outside. Furthermore, since the light receiving surface side filler 3 has a property as an elastic body, it absorbs the thermal expansion of the resin substrate 2 and has a role of relaxing thermal stress transmitted to the solar cell string 7. As the light receiving surface side filler 3, for example, an organic compound made of a thermosetting resin whose main component is a light-transmitting ethylene vinyl acetate copolymer (EVA) or polyvinyl butyral (PVB) is used. This light-receiving surface side filler 3 is obtained by forming the organic compound into a sheet shape having a thickness of about 0.4 to 2 mm by using a T die and an extruder, and thermally curing the sheet cut into an appropriate size. . Here, the light-receiving surface side filler 3 contains a crosslinking agent. This cross-linking agent has a role of bonding between molecules such as EVA. As the crosslinking agent, for example, an organic peroxide that decomposes at a temperature of 70 ° C. to 180 ° C. to generate radicals can be used. Examples of the organic peroxide include 2,5-dimethyl-2,5-bis (t-butylperoxy) hexane and tert-hexylperoxypivalate. If EVA is used for the light receiving surface side filler 3, it is preferable to contain a crosslinking agent at a ratio of about 1 part by mass with respect to 100 parts by mass of EVA. In addition to the EVA and PVB described above, any thermosetting resin or thermoplastic resin containing a crosslinking agent and imparting thermosetting properties can be suitably used as the light receiving surface side filler 3. is there. Therefore, as the light receiving surface side filler 3, for example, an acrylic resin, a silicone resin, an epoxy resin, EEA (ethylene-ethyl acrylate copolymer), or the like can be used.

  Further, in the solar cell module 1A, the light-receiving surface side filler 3 is, as shown in FIG. 1C, the first filler layer 3a located on the resin substrate 2 side and the first filler layer 3a located on the solar cell string 7 side. 2 filler layers 3b. In the present embodiment, the light-receiving surface side filler 3 has a two-layer structure, but may be formed of a plurality of filler layers of three or more layers, while being formed of a single layer. May be.

<Glass fiber>
The glass fiber 4 suppresses the displacement of the light receiving surface side filler 3 caused by the thermal stress generated in the resin substrate 2 and reduces the transmission of the thermal stress to the solar cell string 7 through the light receiving surface side filler 3. Have a role. Such a glass fiber 4 can be obtained, for example, by melting a glass containing silicate as a main component at a high temperature, pulling it into a fiber, and processing it into a single yarn or a twisted yarn.

  And this glass fiber 4 is arrange | positioned so that the longitudinal direction of the glass fiber 4 may follow the longitudinal direction of the connection conductor 6. FIG. In the solar cell module 1 </ b> A, the glass fibers 4 are arranged so as to be substantially parallel to the connection conductor 6.

  The length of the glass fiber 4 is not particularly limited, but if it is substantially the same as the length of the solar cell string 7 in the longitudinal direction (arrangement direction of the solar cell elements), the solar cell string 7 (solar cell element 5). And the thermal stress transmitted to the connecting conductor 6) can be further reduced. Moreover, the outer diameter of the glass fiber 4 can select and use the thing of 10-350 micrometers suitably, for example.

The thermal expansion coefficient of the glass fiber 4 is ^{3 × 10 -6 ~9 × 10 -6} / ℃ about. Therefore, for example, the thermal expansion length of the glass fiber 4 per 1 m when the temperature change is 40 ° C. is 0.12 to 0.36 mm, which is smaller than the resin substrate 2. In addition, since the thermal expansion of the glass fiber is absorbed by the deformation of the second filler 3b having a Young's modulus lower than that of the glass fiber 4, the thermal stress generated from the glass fiber 4 transmitted to the solar cell string 7 is reduced.

On the other hand, the Young's modulus of the glass fiber 4 is higher than the light receiving surface side filler 3 and is about 60 to 80 GPa. Therefore, the glass fiber 4 can restrain the deformation of the light receiving surface side filler 3 near the glass fiber 4 even if a tensile stress is generated in the light receiving surface side filler 3 due to the thermal expansion of the resin substrate 2. That is, in the solar cell module 1A, since the deformation (elongation) of the second filler 3b located farther from the resin substrate 2 than the glass fiber 4 can be suppressed, the thermal expansion of the resin substrate 2 transmitted to the solar cell string 7 is suppressed. Can be reduced. Further, since the first filler 3 a bonded to the resin substrate 2 has a weak binding force due to the glass fiber 4, the tensile stress can be relaxed by following the thermal expansion of the resin substrate 2. Moreover, in the solar cell module 1A, since the glass fiber 4 can be easily disposed between the sheet-like first filler layer 3a and the second filler layer 3b before thermosetting, the glass fiber 4 is accurately positioned. be able to. In addition, when the light-receiving surface side filler 3 is a single layer, the glass fiber 4 is embedded in the single layer. In such a form, it is preferable that the glass fiber 4 is disposed closer to the solar cell string 7 than the resin substrate 2 in order to reduce the influence of thermal stress from the resin substrate 2.

  Moreover, the glass fiber 4 may be provided with two or more as shown to Fig.1 (a). At this time, as shown in FIG.1 (c), it is preferable that the several glass fiber 4 is mutually arrange | positioned on the same plane. In such a form, unevenness of deformation of the light receiving surface side filler 3 caused by thermal stress can be reduced, so that the light receiving surface side filler 3 can be restrained more efficiently.

  In addition, the glass fiber 4 may sew a plurality of fibers to increase the interfacial adhesion as a ribbon having a width of 2 to 4 mm. If it is such a form, even if it is a case where it is used for a long time and a thermal stress is repeatedly added, the delamination of the light-receiving surface side filler 3 and the glass fiber 4 can be reduced efficiently.

<Solar cell element>
The solar cell element 5 has a function of converting incident sunlight into electricity. Moreover, in the solar cell module 1 </ b> A, the plurality of solar cell elements 5 includes a solar cell string 7 configured to be electrically connected in series with each other through the connection conductor 6. The solar cell element 5 is made of, for example, single crystal silicon or polycrystalline silicon having a thickness of about 0.1 to 0.4 mm.

  Further, a PN junction is formed inside the solar cell element 5, electrodes are provided on the light receiving surface and the back surface, respectively, and an antireflection film may be provided on the light receiving surface. The size of the solar cell element 5 is about 70 to 160 mm square in the case of polycrystalline silicon.

<Connection conductor>
The connection conductor 6 has a role of electrically connecting the solar cell elements 5 to each other. Further, the connection conductor 6 has a long shape. As such a connection conductor 6, for example, a copper-coated copper foil having a thickness of about 0.2 mm and a width of about 1 mm to 6 mm is cut into a predetermined length, and the surface of the solar cell element 5 is placed on the electrode. For example, a soldering form is suitable. The coefficient of thermal expansion of copper is 16.5 × 10 ⁻⁶ / ° C. For example, the thermal expansion length per meter when the temperature change is 40 ° C. is 0.66 mm.

Since the connection conductor 6 is mechanically connected to the solar cell element 5 by solder or the like, when the tensile stress is applied to the solar cell element 5, the connection conductor 6 is transmitted to the connection conductor 6. Further, the connection conductor 6 having a smaller area and volume than the solar cell element 5 is likely to be deformed with a small tensile force, and thus is easily subjected to stress concentration.

<Non-light-receiving surface side filler>
The non-light receiving surface side filler 8 has a role of sealing and protecting the solar cell element 5 in cooperation with the light receiving surface side filler 3. The non-light-receiving surface side filler 8 can be made of the same resin as the light-receiving surface side filler 3. Further, the non-light-receiving surface side filler 8 may be made of a resin other than transparent since light is not mainly incident thereon. For example, if EVA colored in white is used, the power generation amount of the solar cell module 1A can be increased. Moreover, if the resin similar to the solar cell element 5 is used, the design property of the solar cell module 1A can be improved. The thickness of the non-light-receiving surface-side filler 8 may be any thickness that can protect the solar cell element 5. For example, when the thickness of the solar cell element 5 is 0.1 mm to 0.3 mm, the thickness is 0.3 mm to 0.8 mm. Use a good one.

<Back protection material>
The back surface protective material 9 has a function of reducing moisture permeability to the solar cell element 5, the light receiving surface side filler 3 and the non-light receiving surface side filler 8. As such a back surface protective material, for example, a fluorine resin sheet having weather resistance sandwiching an aluminum foil, a polyethylene terephthalate (PET) sheet deposited with alumina or silica, and the like are used.

<Terminal box>
The terminal box 10 has a role of allowing the generated power of the solar cell module to be output to the outside. As such a terminal box 10, for example, a terminal made of copper, stainless steel or the like in a box made of polyphenylene ether resin, ABS resin, or the like, and an electric wire drawn out to the outside is used.

  Next, effects of the solar cell module 1A according to the present embodiment will be described.

  In the solar cell module 1 </ b> A, when the temperature of the solar cell module 1 </ b> A rises, the resin substrate 2 having a larger coefficient of thermal expansion than other members greatly expands. The thermal expansion of the resin substrate 2 is transmitted to the glass fiber 4 through the first filler 3a. As shown in FIG. 3, the glass fiber 4 restrains the deformation of the light receiving surface side filler 3 in the direction parallel to the connection conductor 6 on the plane where the glass fiber 4 is arranged. Therefore, in the solar cell module 1 </ b> A, the first filler 3 a between the glass fiber 4 and the resin substrate 2 is subjected to shear deformation to relieve thermal stress, and the first filler 3 a between the glass fiber 4 and the solar cell string 7. 2 Thermal stress transmitted to the filler 3b side can be reduced. As described above, in the solar cell module 1A, the first filler 3a, which is an elastic body, is disposed between the resin substrate 2 and the glass fiber 4, so that the thermal stress is relieved (absorbed) by the first filler 3a. Therefore, peeling between the layers of the resin substrate 2 and the first filler 3a can be reduced. Further, in the solar cell module 1A, since the glass fiber 4 is a continuous long fiber having substantially the same length as the solar cell string 7, the expansion and contraction with respect to the stress is extremely small, and the thermal stress is effectively applied over the entire length of the solar cell string 7. Can be suppressed.

  And as above-mentioned, since the 2nd filler 3b has absorbed the thermal stress with the 1st filler 3a, there is little shear deformation by the thermal stress from the resin substrate 2, and the connection conductor 6 or a solar cell element 5 (solar cell string) can be suppressed thermal stress. Therefore, in the solar cell module, even when the resin substrate 2 having a high thermal expansion coefficient is used as the substrate, the breakage of the connection conductor 6 and the occurrence of cracks in the solar cell element 5 can be suppressed.

For example, when copper (C1020 R-1 / 2H) is used as the connection conductor 6, the mechanical property is that the tensile stress is 315 MPa and the elongation is 10%. Therefore, in the connection conductor 6 having a thickness of 0.2 mm and a width of 2 mm, there is a possibility that the connection conductor 6 is broken when it is stretched by 10% or more at 126N.
When the resin substrate is used, the thermal stress transmitted from the resin substrate to the connection conductor via the light receiving surface side filler 3 arranged so as to come into contact with the connection conductor is the tensile strength at which the connection conductor breaks. The growth exceeded.

  However, in the solar cell module 1 </ b> A, as shown in FIG. 1A, the glass fibers 4 are arranged substantially in parallel along the longitudinal direction of the connection conductor 6. The tensile thermal stress can be reduced. Thereby, in the solar cell module 1A, since the connection conductor 6 to which stress concentration is applied with a small amount of glass fiber 4 can be efficiently protected, the amount of light transmitted to the solar cell element can be secured and the power generation efficiency can be maintained.

  Further, the glass fiber 4 is not uniformly dispersed throughout the interior of the light receiving surface side filler, but in the longitudinal direction of the connection conductor 6 between the first filler 3a and the second filler 3b. Along the plane. Thereby, in solar cell module 1A, it is the structure which does not suppress excessively the expansion | swelling by the heat | fever of the light-receiving surface side filler 3, and accepts the expansion-contraction by the heat of the 1st filler 3a. Therefore, in the solar cell module 1, since the first filler 3a can be shear-deformed in the vicinity of the adhesive interface between the resin substrate 2 and the first filler 3a, delamination at the adhesive interface can be reduced.

  Note that it is preferable to increase the thickness of the first filler 3a in order to further reduce the influence of the thermal expansion of the resin substrate 2. On the other hand, if the thickness of the second filler 3b that does not receive large thermal stress from the resin substrate 2 is made thinner than that of the first filler 3a, the cost can be reduced. In order to make such a structure, for example, at the time of manufacturing a solar cell module, the glass fiber 4 is pressed and arranged so as to be embedded from the back surface side of the light receiving surface side filler 3, and the second filler 3b is thinned. It is good.

  Furthermore, it is preferable that the glass fiber 4 is arrange | positioned directly on the connection conductor 6 connected by the light-receiving surface side of the solar cell element 5. FIG. If it is such a form, although the sunlight which injects into the solar cell element 5 will be interrupted | blocked by the connection conductor 6, the light shielding by the glass fiber 4 will be reduced by arrange | positioning the glass fiber 4 on the connection conductor 6 directly. be able to.

  In the above-described embodiment, the glass fiber 4 has a length substantially the same as the length in the longitudinal direction of the solar cell string 7 (arrangement direction of the solar cell elements). Good.

(Second embodiment)
Next, the solar cell module which concerns on 2nd embodiment of this invention is demonstrated. As shown in FIG. 4, the solar cell module 1 </ b> B according to the present embodiment is in addition to the first glass fibers 4 a (corresponding to the glass fibers 4 of the first embodiment) arranged along the longitudinal direction of the connection conductor 6. The crossed glass fibers (second glass fibers 4b) are arranged in a direction orthogonal to the first glass fibers 4a, and are different from the first embodiment in that the glass fibers have a mesh shape. In the solar cell module 1B, since the force for restraining the deformation of the light receiving surface side filler 3 by the glass fiber can be increased, the solar cell string 7 can be applied even when thermal stress is repeatedly applied over a long period of use. Transmission of thermal stress to can be reduced. Such a solar cell module 1B may be obtained by processing glass fibers into a mesh-like sheet in advance, in addition to arranging glass fibers into a mesh. In addition, in order that sunlight may pass between the glass fibers arrange | positioned at mesh shape, and the solar cell element 5 makes it easy to receive light, it is good to set the space | interval of a mesh as 5 mm or more.

(Third embodiment)
Next, a solar cell module according to a third embodiment of the present invention will be described. As shown in FIG. 5, the solar cell module 1 </ b> C according to this embodiment includes a plurality of resin substrates 2 (first resin layer 2 a and second resin layer 2 b), and the first resin layer 2 a and the second resin layer 2 b. This is different from the above-described embodiment in that the adhesive layer 11 is interposed therebetween. As the adhesive 11, for example, an organic compound made of a thermosetting resin whose main component is a light-transmitting ethylene vinyl acetate copolymer (EVA) or polyvinyl butyral (PVB) can be used.
Furthermore, in the present embodiment, the glass fiber 4 (first glass fiber portion 4 a) is arranged along the connection conductor 6 inside the adhesive layer 11. In such a form, since the glass fiber 4 is in direct contact with the resin substrate 2 having a large thermal expansion, the thermal expansion of the resin substrate 2 is directly restrained, and the transmission of thermal stress is efficiently reduced. it can.

(Fourth embodiment)
Next, a solar cell module according to a fourth embodiment of the present invention will be described. As shown in FIG. 6, the solar cell module 1 </ b> D according to the present embodiment has the glass fibers 4 (first glass fibers 4 a and second glass fibers 4 b) arranged on the same plane inside the single-layer resin substrate 2. This is different from the above embodiment. If it is such a form, while being able to acquire the effect similar to 1 C of solar cell modules, since the glass fiber 4 can be arrange | positioned in the resin substrate 2 previously, a manufacturing man-hour can be reduced.

1: Solar cell module 2: Resin substrate 2a: First resin substrate 2b: Second resin substrate 3: Light-receiving surface side filler 3a: First filler 3b: Second filler
4: Glass fiber 4a: First glass fiber 4b: Second glass fiber 5: Solar cell element 6: Connection conductor 7: Solar cell string 8: Non-light-receiving surface side filler 9: Back surface protective material 10: Terminal box 11: Adhesion layer

Claims (6)

A resin substrate having translucency and having a light receiving surface and a back surface located on the back side of the light receiving surface;
A solar cell string that is disposed on the back side of the resin substrate and has a long connection conductor that electrically connects a plurality of solar cell elements and the adjacent solar cell elements;
A filler disposed between the resin substrate and the solar cell string;
A glass fiber disposed inside at least one of the resin substrate and the filler,
The said glass fiber is arrange | positioned so that the longitudinal direction of the said connection conductor may be followed, The solar cell module characterized by the above-mentioned.   2. The solar cell module according to claim 1, wherein a length of the glass fiber in the longitudinal direction is substantially the same as a length of the solar cell string in the longitudinal direction. A plurality of the glass fibers are provided,
The solar cell module according to claim 1 or 2, wherein the plurality of glass fibers are arranged on the same plane inside at least one of the resin substrate and the filler.   The solar cell module according to any one of claims 1 to 3, further comprising crossed glass fibers arranged in a direction orthogonal to a longitudinal direction of the connection conductor. The filler has a first filler layer located on the resin substrate side, and a second filler layer located on the solar cell string side,
The solar cell module according to any one of claims 1 to 4, wherein the glass fiber is disposed between the first filler layer and the second filler layer. The resin substrate includes: a first resin layer located on the light receiving surface side; a second resin layer located on the back surface side; an adhesive layer interposed between the first resin layer and the second resin layer; Have
The solar cell module according to any one of claims 1 to 5, wherein the glass fiber is disposed inside the adhesive layer.

Images