Solar cell module

Abstract

To provide a solar cell module which is capable of preventing infiltration of moisture thereinto and achieves an increase in moisture resistance.SOLUTION: A solar cell module 1 is provided with an intermediate sheet member 44 between a plurality of solar cells 10 and a back side protection member 42, and includes a laminated structure where a light-transmitting substrate 41, a sealing material 43a, the solar cells 10, a sealing material 43b, the intermediate sheet member 44, a sealing material 43c and the back side protection member 42 are arranged in order from a light receiving surface side. The intermediate sheet member 44 has a reflective layer that reflects light in the wavelength range of 700 nm or more.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a solar cell module including a plurality of solar cells.

Background Art

[0002] Generally, solar cell modules are often installed outdoors. Therefore, in order to obtain sufficient weather resistance and strength, etc., the solar cells are sealed with a sealing material, and a front surface protection member and a back surface protection member are provided. Further, in order to extract the electric power generated by photoelectric conversion in the solar cells, output wiring is electrically connected to the electrode portions of the solar cells. The output wiring is drawn out to the back surface side of the solar cell module and connected to the connection terminals of the terminal box.

[0003] In this type of solar cell module, the back surface protection member has been a laminated film having a multilayer structure in which a metal foil such as aluminum is sandwiched, in order to improve the weather resistance and moisture resistance of the solar cell module. For example, Patent Document 1 discloses using a fluororesin sheet or a polyethylene terephthalate (PET) sheet vapor-deposited with alumina or silica as the back surface protection member.

[0004] Further, as the sealing material disposed on the light-receiving surface side and the back surface side, an ethylene vinyl acetate copolymer (ethylene vinyl acetate, hereinafter referred to as EVA), which is a thermally crosslinkable transparent resin, is often used, and it has light transmittance, heat resistance, electrical insulation, etc.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, when using a back surface protection member containing a metal foil, there is a problem of insulation failure. In recent years, a PET film without a metal foil may also be used as the back surface protection member. The output wiring is led out to the back side of the solar cell module by penetrating the back surface protection member for connection to the connection terminals of the terminal box. Therefore, there was a risk that moisture such as water vapor might easily penetrate through the back surface protection member around the terminal box.

[0007] In addition, EVA, polyolefin, and PVB (polyvinyl butyral) used for the encapsulant have the characteristic that acetic acid is likely to be released by contact with moisture. Particularly in the case of EVA, the amount of acetic acid released is large. The free acid may also corrode the metal electrode or reduce the adhesion between the metal electrode and the encapsulant. Therefore, it has been required to suppress the influence of moisture intrusion from the back side of the solar cell module and to have a more moisture-resistant structure.

[0008] The present invention has been made in view of the above problems, and an object thereof is to provide a solar cell module capable of preventing moisture intrusion from the back side opposite to the light-receiving surface and enhancing moisture resistance and long-term reliability.

Means for Solving the Problems

[0009] The solution means of the present invention for achieving the above object is a solar cell module in which a plurality of electrically connected solar cells are encapsulated by an encapsulant between a light-transmitting substrate and a back surface protection member, and an intermediate sheet member having moisture-proof properties higher than those of the encapsulant is provided between the solar cell and the back surface protection member, and a laminated structure in which the light-transmitting substrate, the encapsulant, the solar cell, the encapsulant, the intermediate sheet member, the encapsulant, and the back surface protection member are sequentially arranged from the light-receiving surface side is provided.

[0010] Furthermore, in a solar cell module having the above configuration, an output section for outputting the power generated in the solar cell to the outside is provided on the back surface, which is the surface opposite the light-receiving surface side of the back surface protection member, and it is preferable that the output section is arranged on the back surface side of the back surface protection member in the laminated structure.

[0011] In the solar cell module having the above configuration, the intermediate sheet member is preferably provided in an area including at least the light receiving surface side of the output section.

[0012] In the solar cell module having the above configuration, the intermediate sheet member may be provided in the entire area between the solar cell and the rear surface protection member.

[0013] In the solar cell module having the above configuration, the intermediate sheet member and the back surface protection member may be made of a common sheet-like member.

[0014] In the solar cell module having the above configuration, the intermediate sheet member preferably comprises a resin sheet containing any one of PTFE, ETFE, or PET.

[0015] In the solar cell module having the above configuration, the intermediate sheet member preferably includes a reflective layer that reflects light in a wavelength range of 700 nm or more.

[0016] By satisfying these specific requirements, the intermediate sheet member in the laminated structure acts to prevent moisture from penetrating from the back surface opposite the light-receiving surface, thereby improving moisture resistance. Effect of the Invention

[0017] According to the present invention, it is possible to prevent the infiltration of moisture from the back surface side opposite to the light receiving surface, thereby further improving moisture resistance and providing a solar cell module with high long-term reliability. [Brief description of the drawings]

[0018]

Figure 1

Figure 2

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Figure 6

Embodiments for Carrying Out the Invention

[0019] Hereinafter, a solar cell module according to an embodiment of the present invention will be described with reference to the drawings.

[0020] (Embodiment 1) FIG. 1 is a plan view showing a schematic configuration of a solar cell module 1 according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view showing an internal structure of the solar cell module 1 and showing a connection structure between solar cells 10.

[0021] In FIG. 1, illustration of constituent members such as a sealing material and a back surface protection member provided in the solar cell module 1 is omitted. Also, constituent members common to Embodiments 1 and 2 described below are denoted by common reference numerals, and duplicate explanations of those constituent members are omitted.

[0022] As shown in FIG. 1, the solar cell module 1 includes a panel 40 including a solar cell string 21 configured by electrically connecting a plurality of solar cells 10, and a plurality of wiring members (32, 33) for electrically connecting the solar cell string 21. A frame body (not shown) is attached to the outer peripheral portion of the panel 40.

[0023] As shown in FIG. 2, the solar cell module 1 has a structure in which a plurality of solar cells 10 arranged in the first direction D1 and the like are sealed with a sealing material 43 between a light-transmitting substrate 41 and a back surface protecting member 42. The light-transmitting substrate 41 is provided on the light-receiving surface side of the solar cell module 1 (the upper side in the figure in FIG. 2), and the back surface protecting member 42 is provided on the back surface side thereof. Here, the "light-receiving surface" of the solar cell module 1 refers to the surface on which sunlight mainly enters, and the "back surface" refers to the surface on the opposite side to the light-receiving surface side.

[0024] The solar cell 10 is a flat photovoltaic element that generates electric power by light irradiation, and as shown in FIG. 2, includes a front surface electrode 101 and a back surface electrode 102. For example, the front surface electrode 101 has a bus bar electrode 103 and a finger electrode (not shown). The bus bar electrode 103 is in a strip shape and is linearly formed in the first direction D1 on the front surface of the solar cell 10. The finger electrodes extend from both side edges of the bus bar electrode 103 in the second direction D2. The finger electrodes are patterned so as to cover the entire light-receiving surface of the solar cell 10 at regular intervals.

[0025] The back surface electrode 102 is formed in a strip shape linearly in the first direction D1 on the back surface of the solar cell 10, and is provided so as to be front-back opposed to the bus bar electrode 103. The wiring member (interconnector) 31 is connected to the bus bar electrode 103 of the front surface electrode 101 of one solar cell 10 and the back surface electrode 102 of the other solar cell 10, and serially connects adjacent solar cells 10.

[0026] The wiring material 31 has a structure in which an outer surface of a base material formed in an elongated strip shape or a wire having a substantially circular cross section is coated with a conductive adhesive or solder. The material of the base material and the wire is not particularly limited, and for example, a metal such as copper can be used.

[0027] The solar cell 10 connected in this way each has a flat plate shape, and in the form shown in FIG. 1, for example, a divided cell obtained by dividing a solar cell substrate having a size of about 156 mm square is used. Therefore, the solar cell 10 has a size of about 156 mm × 78 mm square.

[0028] Here, the divided cell refers to a small cell obtained by dividing a standard-sized cell (also referred to as a full cell, which is a cell for one solar cell wafer). Examples of the divided cell include those obtained by dividing a standard-sized cell into half (half cell), those divided into 1 / 3 or 1 / 4, and the like. In the divided cell, the current value of the current per cell can be decreased (halved in the case of a half cell), and thereby the power loss of the solar cell module 1 can be decreased. In the illustrated form, the solar cell 10 is a half cell.

[0029] In the solar cell module 1, a plurality of half-cell solar cells 10 are arranged in a matrix along the first direction (column direction) D1 and the second direction (row direction) D2. In the solar cell module 1 according to the illustrated form, as shown in FIG. 1, wiring members (end wiring member 32, intermediate wiring member 33) are provided in the middle part of the panel 40 in the first direction D1. On both sides of the first direction D1 with these wiring members interposed therebetween, 12 solar cells 10 are arranged along the first direction D1 and are electrically connected in series by the aforementioned wiring material 31, thereby providing a solar cell string 21. Further, in the second direction D2, a plurality of solar cell strings 21 each including 12 solar cells are arranged adjacent to each other, and the solar cell strings 21 are electrically connected in series via the intermediate wiring member 33.

[0030] The solar cell string 21 disposed at both ends in the second direction D2 is electrically connected to the end wiring member 32 at one end in the first direction D1, and at the other end, it is electrically connected to the adjacent solar cell string 21 by the intermediate wiring member 33. Further, six sets of solar cell strings 21 are arranged along the second direction D2 on both sides sandwiching the wiring members 32 and 33, and a solar cell group 20 in which a total of 72 solar cells 10 of 12×6 are arranged is configured. The end wiring member 32 has a role of extracting electric power from a plurality of solar cell strings.

[0031] As a result, the solar cell module 1 includes two sets of solar cell groups 20 in which 72 solar cells 10 are connected in series in the panel 40, and these solar cell groups 20 are electrically connected in parallel. Therefore, in the solar cell module 1 according to the exemplary embodiment, it is possible to output electric power equivalent to 72 full cells connected in series (equivalent to 72 half cells × 2).

[0032] In such a solar cell module 1, as a structure for enhancing moisture resistance, a moisture-proof intermediate sheet member 44 is provided between the solar cell 10 and the back surface protection member 42.

[0033] Referring to FIG. 2, the solar cell module 1 has a laminated structure in which a light-transmissive substrate 41, a sealing material 43a (43) on the light-receiving surface side, a plurality of solar cells 10, a sealing material 43b (43) in the middle part, an intermediate sheet member 44, a sealing material 43c (43) on the back surface side, and a back surface protection member 42 are arranged in order from the light-receiving surface side. The sealing materials 43a, 43b, and 43c are all sealing materials 43 made of a common resin material mainly composed of EVA.

[0034] The light-transmissive substrate 41 is provided so as to face the surface side of the solar cell 10 (the upper side in the figure in FIG. 2). As the light-transmissive substrate 41, any substrate that is transparent to sunlight can be used without particular limitation, and for example, a glass substrate can be used.

[0035] The back surface protective member 42 is provided so as to face the back surface side (the lower side in the figure in FIG. 2) of the solar cell 10. The back surface protective member 42 can be used without particular limitation as long as it can protect the back surface side of the sealing material 43. For example, a weather-resistant film such as PET can be used.

[0036] The intermediate sheet member 44 is a sheet-like member having moisture-proofing properties and infrared reflectivity. FIG. 3 is a cross-sectional view schematically showing an example of the intermediate sheet member 44. As the intermediate sheet member 44 applied to the solar cell module 1, a sheet-like member having a multilayer structure in which a black layer 441 and a reflective layer 442 are laminated can be exemplified.

[0037] The black layer 441 is a layer containing a main resin having a hydroxyl group, a curing agent having an isocyanate group, and a pigment component. This black layer 441 is a layer having a color tone that is the same color or a similar color to the solar cell 10. For example, the black layer 441 can be formed by applying or laminating a dark-colored ink having a color tone that is the same color or a similar color to the solar cell 10 on the reflective layer 442 and drying and curing it. The coating method can be by various coating methods such as a roll coating method, a gravure roll coating method, a kiss coating method, or a printing method.

[0038] The reflective layer 442 is composed of, for example, a resin sheet containing a white pigment or a resin sheet having a coating layer (coating film or printing film) containing a white pigment, and is a white resin layer that reflects light in a wavelength range of 700 nm or more. For example, the reflective layer 442 is configured to reflect light in a wavelength range of 700 nm or more that has passed through the black layer 441, and more specifically, infrared rays (near-infrared rays) in a wavelength range of 780 nm or more.

[0039] In addition, as the resin sheet constituting the reflective layer 442, for example, resin sheets such as fluororesins such as PTFE (polytetrafluoroethylene) and ETFE (ethylene tetrafluoride-ethylene copolymer), poly(meth)acrylic resins, and polyester resins such as PET (polyethylene terephthalate) can be used. These resin sheets have a lower water vapor transmission rate than the encapsulant 43. For example, the water vapor transmission rate of PET is 0.7 g·mm / m 2 ·d. Thereby, moisture resistance can be imparted to the intermediate sheet member 44. Further, since the reflective layer 442 reflects near-infrared rays, it preferably contains a white pigment having a particle size of 0.1 μm or more and 1.5 μm or less at a predetermined ratio. Examples of such a white pigment include titanium oxide.

[0040] In the solar cell module 1, the intermediate sheet member 44 is laminated in such a direction that the black layer 441 faces the solar cell 10 side (light-receiving surface side) and the reflective layer 442 faces the back surface protection member 42 side (back surface side). By providing the intermediate sheet member 44 containing a resin sheet having a lower water vapor transmission rate than the encapsulant 43c between the encapsulant 43b and the encapsulant 43c, the intrusion of moisture from the encapsulant 43c to the encapsulant 43b can be suppressed. Therefore, the intermediate sheet member 44 is provided between the encapsulant 43b and the encapsulant 43c to prevent the intrusion of moisture from the back surface side to the light-receiving surface side.

[0041] The solar cell module 1 is heat-pressed with such a laminated structure. As shown in FIG. 2, on the back surface side of the solar cell 10, an encapsulant 43b is provided between the solar cell 10 and the intermediate sheet member 44, and the solar cell 10 is encapsulated. On the back surface side of the intermediate sheet member 44, there is also a structure in which an encapsulant 43c is provided and encapsulated between the back surface protection member 42.

[0042] In the solar cell module 1, the black layer 441 of the intermediate sheet member 44 is disposed on the upper layer (light-receiving surface side). For this reason, the incident light to the solar cell module 1 passes through the translucent substrate 41 and the encapsulant 43 and reaches the solar cell 10, and also a part of the incident light reaches the intermediate sheet member 44 on the back side of the solar cell 10. In the intermediate sheet member 44, most of the infrared rays contained in the incident light are reflected by the reflective layer 442. Since the intermediate sheet member 44 is present, most of the infrared rays are reflected and not absorbed, so that the temperature rise of the solar cell module 1 due to infrared absorption can be suppressed.

[0043] On the back side of the solar cell module 1, the intrusion of moisture is prevented by the back protective member 42, and further the intrusion of moisture is also prevented by the intermediate sheet member 44, and the moisture resistance can be ensured doubly. Also, even if there is a slight intrusion of moisture by any chance, since the intermediate sheet member 44 is provided inside the back protective member 42 with the encapsulant 43c interposed therebetween, the intrusion of moisture toward the solar cell 10 side is prevented by the resin sheet constituting the reflective layer 442 of the intermediate sheet member 44. Thereby, it is possible to prevent moisture such as water vapor from the back side from reaching the encapsulant 43b, suppress the generation of free acid in the EVA, and maintain the adhesion between the back electrode 102 etc. of the solar cell 10 and the encapsulant 43.

[0044] Also, when the solar cell module 1 is visually observed from the light-receiving surface side, the solar cell 10 and the intermediate sheet member 44 on its back side can be seen through the translucent substrate 41 and the encapsulant 43. Since the black layer 441 of the intermediate sheet member 44 is the same color or a similar color as the solar cell 10, they can be seen integrally, and the design property can be improved.

[0045] FIG. 4 is a cross-sectional view schematically showing another example of the intermediate sheet member 44 applied to the solar cell module 1. The intermediate sheet member 44 may be a sheet-like member having a multilayer structure including a black layer 441, a reflective layer 442, and a transparent resin layer 443 in addition to these. In this case, the transparent resin layer 443 is preferably a transparent or translucent resin layer that improves the adhesiveness with the EVA which is the encapsulant 43 and transmits visible light. For the transparent resin layer 443, for example, polyolefin resins such as polyethylene resin and polypropylene resin, and polyethylene terephthalate (PET) can be used.

[0046] Also, with the intermediate sheet member 44 configured in this way, in the solar cell module 1, it is possible to suppress the ingress of moisture from the back side and prevent it from reaching the encapsulant 43b. Therefore, the generation of free acid in the EVA can be suppressed, and the adhesion between the back electrode 102 etc. of the solar cell 10 and the encapsulant 43 can be maintained.

[0047] In addition, in the present embodiment, when a resin sheet including a color tone layer of the same color or the same color system as the solar cell 10 is used for the back protective member 42 of the solar cell module 1, the intermediate sheet member 44 does not necessarily have to include the black layer 441. That is, for example, the intermediate sheet member 44 may have a multilayer structure of a reflective layer 442 and a transparent resin layer 443. Even if the black layer 441 is not provided in the intermediate sheet member 44, since the back protective member 42 includes a layer of the same color or the same color system as the solar cell 10, they look integrated, and the designability can be improved.

[0048] (Embodiment 2) FIG. 5 is a plan view showing the schematic configuration of the solar cell module 1 according to Embodiment 2 of the present invention, and FIG. 6 is a cross-sectional view showing an example of the laminated structure of the internal structure of the solar cell module 1 including the intermediate sheet member 44.

[0049] The solar cell module 1 according to this embodiment is characterized in the arrangement form of the intermediate sheet member 44, and the other configurations are common to the solar cell module 1 according to Embodiment 1.

[0050] As shown in FIG. 6, on the back surface (the lower side in the figure), which is the surface opposite to the light-receiving surface side of the back surface protection member 42, an output portion 50 for leading out the power generated by the solar cell 10 to the outside is provided. Although not described in these figures, the solar cell module 1 has two lead-out electrodes on the positive electrode side and the negative electrode side, and one end of each lead-out electrode is electrically connected to the solar cell 10.

[0051] In the output portion 50, the output lead portion (wiring for output) 51 of the lead-out electrode penetrates the back surface protection member 42 and is led out to the outside of the solar cell module 1. The led-out output lead portion 51 is drawn into the terminal box 52 and is electrically connected to the external output cable 53 via connection terminals and the like. In the solar cell module 1 having such a structure, in order to take out the power generated by the solar cell 10 to the outside, an opening is provided in the back surface protection member 42 to lead out the output lead portion 51, and wiring is performed to reach the terminal box 52. Therefore, in this wiring method, moisture such as water vapor easily penetrates from the output lead portion 51 and the opening of the back surface protection member 42.

[0052] On the other hand, in the solar cell module 1 according to the present embodiment, the intermediate sheet member 44 is provided in at least a region including the light-receiving surface side of the output portion 50. The output portion 50 is provided, for example, between the solar cell groups 20 in the solar cell module 1. In the form shown in FIG. 5, since the terminal box of the output portion 50 is provided at a substantially intermediate portion in the first direction D1 of the solar cell module 1, the intermediate sheet member 44 is arranged in a strip shape that is long in the second direction D2 so as to include the intermediate portion.

[0053] As shown in FIG. 6, in the vicinity of the output portion 50, the solar cell module 1 has a laminated structure in which a translucent substrate 41, a sealing material 43a (43) on the light-receiving surface side, a plurality of solar cell elements 10, a sealing material 43b (43) in the middle portion, an intermediate sheet member 44, a sealing material 43c (43) on the back surface side, and a back surface protection member 42 are arranged in this order from the light-receiving surface side. The output portion 50 is disposed on the back surface side of the back surface protection member 42 in such a laminated structure, and an intermediate sheet member 44 is laminated between the sealing material 43b and the sealing material 43c inside the output portion 50.

[0054] Thus, in the output portion 50 where there is concern about the intrusion of moisture such as water vapor, in addition to the back surface protection member 42, an intermediate sheet member 44 is laminated on the back surface side of the solar cell module 1, so that such intrusion of moisture can be prevented. Therefore, it is possible to prevent moisture from the back surface side from reaching the sealing material 43b, suppress the generation of free acid in the EVA, and maintain the adhesion between the back surface electrode 102 of the solar cell element 10 and the sealing material 43.

[0055] Thus, when the intermediate sheet member 44 is provided in at least the region including the light-receiving surface side of the output portion 50, a sheet-like member common to the intermediate sheet member 44 can be used for the back surface protection member 42, and it can include a reflective layer 442. In this case, the incident light to the solar cell module 1 passes through the translucent substrate 41 and the sealing material 43 and reaches the solar cell element 10, and a part of the incident light reaches the intermediate sheet member 44 or the back surface protection member 42 on the back surface side of the solar cell element 10. In these intermediate sheet member 44 and back surface protection member 42, most of the infrared rays contained in the incident light are reflected by the reflective layer 442, and the temperature rise of the solar cell module 1 due to infrared absorption can be suppressed.

[0056] When the solar cell module 1 is viewed from the light-receiving surface side, the solar cell 10 and the intermediate sheet member 44 on the back side thereof can be seen through the translucent substrate 41 and the encapsulant 43. In a region where the intermediate sheet member 44 is absent, the back surface protection member 42 having the same configuration as the intermediate sheet member 44 can be seen. Since these include layers of the same color or similar colors as the solar cell 10, the solar cell 10 and the intermediate sheet member 44, and the solar cell 10 and the back surface protection member 42 can all be seen integrally, improving the designability.

[0057] As described above, in the solar cell module 1 according to the present invention, ingress of moisture from the back side can be suppressed, and a more moisture-resistant laminated structure can be provided. As a result, generation of free acid in the EVA constituting the encapsulant 43 can be suppressed, and a highly reliable solar cell module 1 can be obtained in the long term. Further, by laminating the intermediate sheet member 44 intensively on the light-receiving surface side of the output portion 50 corresponding to the position where the output portion 50 is provided, the back surface protection member 42 and the intermediate sheet member 44 can have double moisture resistance, preventing ingress of moisture from the output portion 50. The intermediate sheet member 44 is not limited to being provided in a region including the light-receiving surface side of the output portion 50, and may be provided in a wider region between the solar cell 10 and the back surface protection member 42, or may be provided in the entire region.

[0058] In the above-described Embodiment 1 and Embodiment 2, as the solar cell 10 provided in the solar cell module 1, an example was given of a standard-sized cell (full cell) divided into halves, but the present invention is not limited thereto, and for example, it may be divided into 1 / 4, or may be a full cell. Further, the solar cell 10 may be a single-sided light-receiving type or a double-sided light-receiving type. The number of arrays and types of the solar cells 10 are not particularly limited, and for example, those composed of various semiconductor materials such as polycrystalline semiconductors and thin film semiconductors can be applied as the solar cell 10.

[0059] The above-described embodiments are illustrative in all respects and are not intended to be a basis for a limiting interpretation. Therefore, the technical scope of the present invention is not construed by the embodiments alone, but is defined based on the description in the claims. Also, all modifications within the meaning and scope equivalent to the claims are included.

Explanation of Reference Numerals

[0060] 1 Solar cell module 10 Solar cells 101 Front electrode 102 Back electrode 103 Bus bar electrode 20 Solar cell group 21 Solar cell string 31 Wiring material 32 End wiring member (wiring member) 33 Intermediate wiring member (wiring member) 40 Panel 41 Transparent substrate 42 Back protection member 43 Sealing material 44 Intermediate sheet member 441 Black layer 442 Reflective layer 50 Output section 51 Output lead section 52 Terminal box 53 External output cable

Claims

1. A solar cell module including a plurality of solar cells electrically connected between a light-transmitting substrate and a rear surface protection member and sealed with a sealing material, an intermediate sheet member having a moisture resistance greater than that of the sealing material is provided between the solar cell and the back surface protection member; a laminated structure in which the light-transmitting substrate, the sealing material, the solar cell, the sealing material, the intermediate sheet member, the sealing material, and the back surface protection member are disposed in this order from the light-receiving surface side, The intermediate sheet member is The solar cell is provided in the entire area between the solar cell and the back surface protection member, A reflective layer that reflects light in a wavelength range of 700 nm or more in the entire region is included, A solar cell module comprising: a black layer on the light-receiving surface side of the reflective layer, the black layer being in contact with the sealing material.

2. The solar cell module according to claim 1 , an output section that outputs power generated by the solar cell to the outside is provided on a back surface of the back surface protection member, the back surface being the surface opposite to the light receiving surface; The solar cell module, characterized in that the output section is disposed on the back surface side of the back surface protection member in the laminated structure.

3. The solar cell module according to claim 1 or 2, The solar cell module according to claim 1, wherein the intermediate sheet member and the rear surface protection member are made of a common sheet-like member.

4. The solar cell module according to any one of claims 1 to 3, 13. A solar cell module, comprising: a reflecting layer of the intermediate sheet member which is a resin sheet containing any one of PTFE, ETFE, and PET.

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