Solar cell module

Abstract

The present invention provides a solar cell module capable of suppressing moisture from intruding into a solar cell element. This solar cell module is provided with: a sealing layer that seals a solar cell element; a surface protection member disposed on the light incident side with respect to the sealing layer; a back surface protection member disposed on the opposite side from the light incident side with respect to the sealing layer; a moisture absorption layer disposed so as to cover the side surface of the sealing layer; and a frame body which is disposed on the outer peripheral edge of the solar cell module and in which the moisture absorption layer, the outer peripheral edge of the front surface protection member, the outer peripheral edge of the sealing layer, and the outer peripheral edge of the back surface protection member are embedded. The moisture absorption layer is bonded to the inner wall of the frame body through a bonding layer with the water vapor permeability higher than that of the sealing layer.

Description

TECHNICAL FIELD

[0001] The present application relates to a solar cell module. BACKGROUND

[0002] As such a technical field, for example, there is the technology described in Patent Literature 1. The solar cell module described in Patent Literature 1 is provided with: a first substrate; a solar cell element provided on a surface of the first substrate; a second substrate opposed to the first substrate; a moisture absorbing layer attached to the first substrate and the second substrate; and an adhesive layer disposed along a peripheral portion of the first substrate and the second substrate in a manner of surrounding an outer side of the moisture absorbing layer. In this solar cell module, the solar cell element provided on the first substrate is surrounded by the air layer, and thus the moisture absorbing layer is provided to prevent moisture from invading the solar cell element and to prevent degradation of the solar cell due to moisture.

[0003] Patent Literature 1: Japanese Patent Application Publication No. 2013-218796 SUMMARY

[0004] The moisture absorbing layer is regenerated by releasing moisture and is used again to prevent moisture invasion. However, in the above-described solar cell module, there is a problem that the moisture released when the moisture absorbing layer is regenerated invades the solar cell element and causes degradation of the solar cell. More specifically, the moisture vapor transmission rate of the resin material forming the adhesive layer is higher than that of the moisture absorbing layer, and thus the moisture to the moisture absorbing layer cannot be controlled, and the moisture absorption in the moisture absorbing layer easily becomes a saturated state. In addition, at the time of regeneration of the moisture absorbing agent, the released moisture more easily leaks to the air layer side than the adhesive layer side, and thus easily invades the solar cell element. As a result, degradation of the solar cell element due to moisture is caused.

[0005] The present application has been achieved in order to solve such a technical problem, and aims to provide a solar cell module capable of suppressing moisture invasion into a solar cell element.

[0006] The solar cell module according to the present application is characterized by being provided with: a sealing layer that seals a solar cell element; a surface protection member disposed on the light incident side with respect to the sealing layer; a back surface protection member disposed on the side opposite to the light incident side with respect to the sealing layer; a moisture absorbing layer disposed in a manner of covering the side surface of the sealing layer; and a frame disposed at the outer peripheral portion of the solar cell module and having the moisture absorbing layer, the outer peripheral portion of the surface protection member, the outer peripheral portion of the sealing layer, and the outer peripheral portion of the back surface protection member embedded therein, the moisture absorbing layer being adhered to the inner wall of the frame via an adhesive layer having a higher moisture vapor transmission rate than the sealing layer.

[0007] In the solar cell module according to the present application, the moisture absorbing layer is bonded to the inner wall of the frame via an adhesive layer having a water vapor permeability higher than that of the sealing layer. Since the adhesive layer has a water vapor permeability higher than that of the sealing layer, moisture absorbed by the moisture absorbing layer is more easily released to the adhesive layer side than to the sealing layer side. Therefore, moisture absorbed by the moisture absorbing layer is easily released to the outside of the solar cell module via the adhesive layer. As a result, moisture intrusion into the solar cell element can be suppressed.

[0008] In the solar cell module according to the present application, it is preferable that the frame have an inner metal frame in which the moisture absorbing layer, the outer peripheral portion of the surface protective member, the outer peripheral portion of the sealing layer, and the outer peripheral portion of the back surface protective member are embedded, and an outer resin frame disposed outside the inner metal frame so as to cover the inner metal frame, the inner metal frame being formed of a metal material having a water vapor permeability lower than that of the surface protective member and the back surface protective member. In this way, since the inner metal frame is formed of a metal material having a water vapor permeability lower than that of the surface protective member and the back surface protective member, the inner metal frame can be used to suppress moisture intrusion into the solar cell element.

[0009] In the solar cell module according to the present application, it is preferable that the inner metal frame be formed of aluminum or stainless steel. In this way, the inner metal frame formed of aluminum or stainless steel can suppress moisture intrusion into the solar cell element. Also, since aluminum or stainless steel is a relatively inexpensive and light metal, the influence on cost due to the disposition of the inner metal frame can be suppressed.

[0010] In the solar cell module according to the present application, it is preferable that the inner metal frame have a groove portion in which the moisture absorbing layer, the outer peripheral portion of the surface protective member, the outer peripheral portion of the sealing layer, and the outer peripheral portion of the back surface protective member are embedded, the groove portion being narrowed as it approaches the solar cell element side. In this way, by ensuring the bonding strength of the moisture absorbing layer to the inner metal frame and narrowing the groove portion as it approaches the solar cell element side, the contact area of the adhesive layer with air can be reduced, and thus moisture intrusion via the adhesive layer can be further suppressed.

[0011] Effects of the Invention

[0012] According to the present application, moisture intrusion into the solar cell element can be suppressed. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic plan view showing a solar cell module according to Embodiment 1.

[0014] Figure 2 is a schematic sectional view showing a solar cell module according to Embodiment 1.

[0015] Figure 3 In the figure, (a) is a schematic cross-sectional view for explaining an intrusion path of moisture, and (b) is a schematic cross-sectional view for explaining regeneration of the moisture absorbing layer.

[0016] Figure 4 is a schematic cross-sectional view showing a solar cell module according to the second embodiment.

[0017] Figure 5 is a schematic cross-sectional view showing a solar cell module according to the third embodiment.

[0018] Figure 6 is a schematic cross-sectional view showing a solar cell module according to the fourth embodiment. DETAILED DESCRIPTION

[0019] Embodiments of a solar cell module according to the present application will be described below with reference to the drawings. In the drawings, the same reference numerals are assigned to the same components, and repeated description thereof will be omitted. Also, in the following description, unless specifically mentioned, "side surface" means an end surface in the direction of light incidence (in other words, an end surface parallel to the direction of light incidence) on the assumption that sunlight is perpendicularly incident on the solar cell module. Also, "moisture" means a substance including water, water vapor, and the like.

[0020] [First Embodiment]

[0021] Figure 1 is a schematic plan view showing a solar cell module according to the first embodiment, Figure 2 is a schematic cross-sectional view showing a solar cell module according to the first embodiment. The solar cell module 10 of the present embodiment, for example, has a flat plate shape, and includes a plurality of solar cell elements 11, a sealing layer 12 that seals the solar cell elements 11, a surface protection member 13 and a back surface protection member 14 that sandwich the sealing layer 12 in the direction of light incidence, a moisture absorbing layer 15 that is disposed so as to cover the side surface of the sealing layer 12, and a rectangular frame 16 that is disposed at the outer peripheral portion of the solar cell module 10 and holds the solar cell module 10.

[0022] The solar cell elements 11 are not particularly limited, and can be crystalline silicon solar cell elements, perovskite solar cell elements, or organic thin film solar cell elements. In the case of perovskite solar cell elements or organic thin film solar cell elements, a soft resin film can be used on the substrate, and thus flexibility of the solar cell module 10 can be expected. Also, a plurality of solar cell elements 11 having such a structure are regularly disposed in the length direction and the width direction of the solar cell module 10 in an electrically connected state.

[0023] The sealing layer 12 prevents moisture from entering the solar cell element 11 by sealing the solar cell element 11, and functions to protect the solar cell element 11 from impact. The sealing layer 12 is formed, for example, in a flat plate shape from a transparent (e.g., light transmittance of 90% or more) resin material that transmits sunlight. Further, the sealing layer 12 is preferably formed from a resin material that has flexibility and can impart flexibility to the solar cell module 10, and that has chemical stability in order to suppress degradation of the solar cell module 10. As such a resin material, for example, EVA (ethylene-vinyl acetate copolymer resin), polyolefin, PVB (polyvinyl butyral), or the like can be given.

[0024] The surface protection member 13 is disposed on the light incident side with respect to the sealing layer 12, and is a flat plate member that protects the surface side of the solar cell element 11. The surface protection member 13 is formed, for example, from a material that has barrier properties and scratch resistance with respect to moisture and gas, and that is transparent (e.g., light transmittance of 90% or more) and transmits sunlight. As the material used in the surface protection member 13, a glass sheet, a polyethylene terephthalate sheet, a polyamide sheet, a polyimide sheet, a polycarbonate sheet, a polytetrafluoroethylene sheet, or the like can be given. In the present embodiment, the surface protection member 13 is formed from a glass sheet.

[0025] The back surface protection member 14 is disposed on the side opposite to the light incident side with respect to the sealing layer 12, and is a flat plate member that protects the back surface side of the solar cell element 11. The back surface protection member 14 is formed, for example, from a material that has barrier properties and scratch resistance with respect to moisture and gas. The back surface protection member 14 can be formed from a transparent material, or can be formed from a non-transparent material. Further, the back surface protection member 14 is preferably formed from a material that reflects light in order to increase the amount of light incident to the solar cell element 11.

[0026] As the material used in the back surface protection member 14, a glass sheet, a polyethylene terephthalate sheet, a polyamide sheet, a polyimide sheet, a polycarbonate sheet, a polytetrafluoroethylene sheet, a metal sheet, or the like can be given. In the present embodiment, the back surface protection member 14 is formed from a glass sheet, like the surface protection member 13.

[0027] The moisture absorbing layer 15 is used to prevent moisture from entering the solar cell element 11 via the sealing layer 12. As shown, the moisture absorbing layer 15 is disposed so as to cover the side surface of the surface protection member 13, the side surface and the back surface of the sealing layer 12, and the side surface of the back surface protection member 14. Further, the moisture absorbing layer 15 is formed so that the upper surface is coplanar with the upper surface of the surface protection member 13, and the bottom surface is coplanar with the bottom surface of the back surface protection member 14. Figure 2

[0028] ​In this embodiment, the moisture-absorbing layer 15 is regenerable. That is, the moisture-absorbing layer 15 is formed to capture moisture (i.e., absorb moisture) and to release the captured moisture into the air (i.e., dehumidify) when in contact with air with a humidity lower than that of the moisture-absorbing layer 15. The moisture-absorbing layer 15 may use a regenerable desiccant, such as cellulose, zeolite, molecular sieve, silica gel, or activated carbon.

[0029] like Figure 2 As shown, the frame 16 is configured to surround the moisture-absorbing layer 15, extending from the upper surface of the outer periphery of the surface protection member 13, through the side of the moisture-absorbing layer 15, to the bottom surface of the periphery of the back protection member 14. In this embodiment, the frame 16 has an inner metal frame 161 in which the moisture-absorbing layer 15, the outer periphery of the surface protection member 13, the outer periphery of the sealing layer 12, and the outer periphery of the back protection member 14 are embedded, and an outer resin frame 162 disposed on the outside of the inner metal frame 161 and covering the inner metal frame 161.

[0030] The inner metal frame 161 has a U-shaped cross-section and includes a pair of metal frames (a surface-side metal frame 161a and a back-side metal frame 161b) facing each other in the light incident direction, and a side metal frame 161c connecting the surface-side metal frame 161a and the back-side metal frame 161b and extending in the light incident direction. A groove 161d is formed by the surface-side metal frame 161a, the side metal frame 161c, and the back-side metal frame 161b. A moisture-absorbing layer 15, the outer periphery of the surface protection member 13, the outer periphery of the sealing layer 12, and the outer periphery of the back protection member 14 are embedded inside the groove 161d.

[0031] In this embodiment, the inner metal frame 161 is formed of a metal material with a water vapor transmission rate of less than that of the surface protective member 13 and the back protective member 14. Examples of such metal materials include aluminum or stainless steel. Water vapor transmission rate (WVTR), also known as water permeability, is defined as the amount of water vapor passing through a unit area of ​​material per unit time under specified temperature and humidity conditions, and is measured according to JIS standards (e.g., JIS K7129, JIS Z0208, or JIS Z0222).

[0032] As described above, the surface protection component 13 and the back protection component 14 are made of glass. The water vapor permeability of glass is about 10⁻⁶ g / (m²day), which is almost negligible for water vapor to pass through. The water vapor permeability of aluminum and stainless steel is even lower than that of glass.

[0033] like Figure 2As shown, the moisture-absorbing layer 15, the outer periphery of the surface protection member 13, and the outer periphery of the back protection member 14, which are embedded inside the groove 161d (in other words, inside the inner metal frame 161), are bonded to the inner wall of the inner metal frame 161 via an adhesive layer 17. The adhesive layer 17 is formed of resin. The resin used in the adhesive layer 17 can be a UV-curable resin or a thermosetting resin, but a UV-curable resin is more preferred. This is because, in the case of a thermosetting resin, the solar cell element 11 may deteriorate due to heating.

[0034] Furthermore, the UV-curing resin is preferably selected for use with excellent moisture permeability resistance, and can be either a cationic polymeric UV-curing resin or a free radical polymeric UV-curing resin. Examples of cationic polymeric UV-curing resins include epoxy compounds, oxetane compounds, and polyfunctional vinyl ether compounds. Cationic polymeric UV-curing resins contain cationic photopolymerization initiators.

[0035] Furthermore, the adhesive layer 17 is disposed on the entire inner wall of the inner metal frame 161. More specifically, the adhesive layer 17 is formed from the inner wall of the surface metal frame 161a through the inner wall of the side metal frame 161c to the inner wall of the back metal frame 161b.

[0036] On the other hand, the outer resin frame 162, like the inner metal frame 161, is formed with a U-shaped cross-section so that the inner metal frame 161 can be embedded inside. Specifically, the outer resin frame 162 has a pair of resin frames (a surface-side resin frame 162a and a back-side resin frame 162b) facing each other in the light incident direction, and a side resin frame 162c connecting the surface-side resin frame 162a and the back-side resin frame 162b and extending along the light incident direction. Furthermore, the end face of the surface-side resin frame 162a is flush with the end face of the surface-side metal frame 161a, and the end face of the back-side resin frame 162b is flush with the end face of the back-side metal frame 161b. The outer resin frame 162 with this structure is formed, for example, from epoxy resin, polyimide, silicone resin, elastomer resin, etc.

[0037] The following is for reference. Figure 3 (a) and Figure 3 (b) The effects of the solar cell module 10 involved in this embodiment will be explained.

[0038] Figure 3 (a) is a schematic diagram illustrating the intrusion path of water. For example... Figure 3As indicated by the arrows in (a), the main paths through which moisture penetrates into the solar cell element 11 are: path 1 R1, via the surface protection member 13 and / or the back protection member 14; path 2 R2, via the adhesive layer 17 between the upper surface of the surface protection member 13 and the surface-side metal frame 161a and / or the adhesive layer 17 between the bottom surface of the back protection member 14 and the back-side metal frame 161b; path 3 R3, via the surface-side resin frame 162a and / or the back-side resin frame 162b; and path 4 R4, via the side resin frame 162c.

[0039] In the case of the first path R1, the surface protection component 13 and the back protection component 14 are made of glass (the water vapor transmittance of glass is about 10-6 g / (m2day)). Therefore, it can be determined that the amount of water that enters through the first path R1 is very small and will not cause the solar cell element 11 to deteriorate.

[0040] Furthermore, in the cases of the third path R3 and the fourth path R4, the inner metal frame 161 disposed on the inner side of the outer resin frame 162 is formed of aluminum or stainless steel with a water vapor permeability of less than that of the surface protection member 13 and the back protection member 14. Therefore, moisture that enters through the surface-side resin frame 162a, the back-side resin frame 162b, and the side resin frame 162c is blocked by the surface-side metal frame 161a, the back-side metal frame 161b, and the side metal frame 161c. Therefore, it can also be determined that the amount of moisture that enters through the third path R3 and the fourth path R4 is also very small and will not cause degradation of the solar cell element 11.

[0041] On the other hand, in the case of the second path R2, since the adhesive layer 17 is formed of a resin with relatively high water vapor permeability, moisture can easily penetrate through the adhesive layer 17. To address this, in this embodiment, a moisture-absorbing layer 15 is provided on the end face of the sealing layer 12 to prevent moisture from penetrating into the solar cell element 11 through the sealing layer 12. That is, the moisture-absorbing layer 15 absorbs the moisture penetrating through the second path R2 to suppress the penetration into the solar cell element 11. Furthermore, the moisture-absorbing layer 15 uses a so-called regenerable desiccant capable of repeatedly performing both moisture absorption and desiccant functions.

[0042] Furthermore, to address the issue of moisture released during the regeneration of the moisture-absorbing layer intruding into the solar cell element and causing solar cell degradation, in this embodiment, the moisture-absorbing layer 15 is bonded to the inner wall of the inner metal frame 161 via an adhesive layer 17 with a water vapor permeability higher than that of the sealing layer 12. That is, the water vapor permeability of the adhesive layer 17 used to bond the moisture-absorbing layer 15 is higher than that of the sealing layer 12.

[0043] Thus, by making the water vapor permeability of the adhesive layer 17 higher than that of the sealing layer 12, the moisture absorbed by the moisture-absorbing layer 15 is more easily released to the adhesive layer 17 side than that of the sealing layer 12. Therefore, as Figure 3 As shown in (b), for example, when in contact with air having a lower humidity than the moisture-absorbing layer 15, the moisture absorbed by the moisture-absorbing layer 15 (in other words, the moisture captured by the moisture-absorbing layer 15) is easily released into the air via the adhesive layer 17 in the direction opposite to the second path R2. As a result, the intrusion of moisture into the solar cell element 11 can be suppressed, thus preventing the degradation of the solar cell element 11 caused by moisture intrusion, and enabling the moisture-absorbing layer 15 to be regenerated.

[0044] Furthermore, the inner metal frame 161 is formed of aluminum or stainless steel with a water vapor permeability lower than that of the surface protection member 13 and the back protection member 14. Therefore, the inner metal frame 161 can be used to limit the intrusion path to the moisture-absorbing layer 15 and suppress the intrusion of moisture into the solar cell element 11. In addition, since aluminum or stainless steel are relatively inexpensive and have a low specific gravity, the cost impact caused by the configuration of the inner metal frame 161 can be suppressed.

[0045] [Second Implementation]

[0046] The following is for reference. Figure 4 A second embodiment of the solar cell module will be described. The solar cell module 10A of this embodiment differs from the first embodiment in that the frame 16A does not have an inner metal frame 161. Other structures are the same as in the first embodiment, therefore, repeated descriptions are omitted.

[0047] Figure 4 This is a schematic cross-sectional view showing the solar cell module according to the second embodiment. (Example) Figure 4 As shown, in the solar cell module 10A of this embodiment, the frame 16A only has an outer resin frame 162, and the outer periphery of the moisture-absorbing layer 15, the outer periphery of the surface protection member 13, the outer periphery of the sealing layer 12, and the outer periphery of the back protection member 14 are embedded inside the outer resin frame 162. That is, in this embodiment, the moisture-absorbing layer 15 is directly bonded to the inner wall of the outer resin frame 162 via the adhesive layer 17.

[0048] In addition to achieving the same effects as in the first embodiment described above, the solar cell module 10A constructed in this way can reduce manufacturing costs because the frame 16A does not have an inner metal frame 161. Furthermore, the solar cell module 10A of this embodiment is preferably used, for example, in environments with low humidity, such as desert regions.

[0049] [Third Implementation]

[0050] The following is for reference. Figure 5 A third embodiment of the solar cell module will be described. The solar cell module 10B of this embodiment differs from the first embodiment in that the inner metal frame 161 is formed in a C-shaped cross-section. Other structures are the same as in the first embodiment, therefore, repeated descriptions are omitted.

[0051] Figure 5 This is a schematic cross-sectional view showing the solar cell module according to the third embodiment. (Example) Figure 5 As shown, the groove 161d, in which the moisture-absorbing layer 15, the outer periphery of the surface protection member 13, the outer periphery of the sealing layer 12, and the outer periphery of the back protection member 14 are embedded, narrows as it approaches the solar cell element 11.

[0052] Specifically, in the light incident direction, the end portion of the surface-side metal frame 161a protrudes from the end portion of the surface-side resin frame 162a toward the solar cell element 11 and is bent to be close to the upper surface of the surface protection member 13. Similarly, the end portion of the back-side metal frame 161b also protrudes from the end portion of the back-side resin frame 162b toward the solar cell element 11 and is bent to be close to the bottom surface of the back-side protection member 14. Therefore, the inner metal frame 161 has a C-shaped cross-section.

[0053] In addition to achieving the same effects as in the first embodiment described above, the solar cell module 10B constructed in this way can ensure the bonding strength between the inner metal frame 161 and the surface protection member 13, the moisture-absorbing layer 15, and the back protection member 14 by reducing the contact area of ​​the adhesive layer 17 disposed between the upper surface of the surface protection member 13 and the surface side metal frame 161a and in contact with air, and the contact area of ​​the adhesive layer 17 disposed between the bottom surface of the back protection member 14 and the back side metal frame 161b and in contact with air, and further suppress the intrusion of moisture through the adhesive layer 17.

[0054] In addition, such as Figure 5 As shown, the shortest distance t1 between the surface-side metal frame 161a and the upper surface of the surface protection member 13, and the shortest distance t2 between the back-side metal frame 161b and the bottom surface of the back protection member 14, are preferably both 0 or more and 0.2 mm or less. This prevents damage to the surface protection member 13 or the back protection member 14 by allowing the inner metal frame 161 to directly contact it, and also inhibits the intrusion of moisture through the adhesive layer 17.

[0055] [Fourth Implementation]

[0056] The following is for reference.Figure 6 A fourth embodiment of the solar cell module will be described. The solar cell module 10C of this embodiment differs from the first embodiment in that the end portions of the surface-side metal frame 161a and the rear-side metal frame 161b are inclined toward the solar cell element 11, respectively. Other structures are the same as in the first embodiment, therefore, repeated descriptions are omitted.

[0057] Figure 6 This is a schematic cross-sectional view showing the solar cell module according to the fourth embodiment. (Example) Figure 6 As shown, the groove 161d, in which the moisture-absorbing layer 15, the outer periphery of the surface protection member 13, the outer periphery of the sealing layer 12, and the outer periphery of the back protection member 14 are embedded, narrows as it approaches the solar cell element 11.

[0058] Specifically, in the light incident direction, the end portion of the surface-side metal frame 161a protrudes from the end face of the surface-side resin frame 162a toward the solar cell element 11 and is inclined close to the upper surface of the surface protection member 13. Similarly, the end portion of the back-side metal frame 161b also protrudes from the end face of the back-side resin frame 162b toward the solar cell element 11 and is inclined close to the bottom surface of the back-side protection member 14.

[0059] In addition to achieving the same effects as in the first embodiment described above, the solar cell module 10C constructed in this way ensures the bonding strength between the inner metal frame 161 and the surface protection member 13, the moisture-absorbing layer 15, and the back protection member 14 because the groove portion 161d narrows as it approaches the solar cell element 11. Furthermore, by reducing the contact area between the adhesive layer 17 disposed between the upper surface of the surface protection member 13 and the surface side metal frame 161a and the air, as well as the contact area between the adhesive layer 17 disposed between the bottom surface of the back protection member 14 and the back side metal frame 161b and the air, the intrusion of moisture through the adhesive layer 17 can be further suppressed.

[0060] In addition, such as Figure 6 As shown, the shortest distance t3 between the surface-side metal frame 161a and the upper surface of the surface protection member 13, and the shortest distance t4 between the back-side metal frame 161b and the bottom surface of the back protection member 14 are both preferably 0.2 mm or less. This prevents damage to the surface protection member 13 or the back protection member 14 by allowing the inner metal frame 161 to directly contact it, and also inhibits the intrusion of moisture through the adhesive layer 17.

[0061] The embodiments of the present invention have been described in detail above, but the present invention is not limited to the above embodiments, and various design changes can be made without departing from the spirit of the present invention as set forth in the claims.

[0062] Symbol Explanation

[0063] 10, 10A, 10B, 10C - Solar cell module; 11 - Solar cell element; 12 - Sealing layer; 13 - Surface protection component; 14 - Back protection component; 15 - Moisture-absorbing layer; 16, 16A - Frame; 17 - Adhesive layer; 161 - Inner metal frame; 161a - Surface side metal frame; 161b - Back side metal frame; 161c - Side metal frame; 162 - Outer resin frame; 162a - Surface side resin frame; 162b - Back side resin frame; 162c - Side resin frame.

Claims

1. A solar cell module characterized by Possessing: a sealing layer that seals a solar cell element; a surface protection member disposed on the light incident side with respect to the sealing layer; a back surface protection member disposed on the side opposite to the light incident side with respect to the sealing layer; a moisture absorbing layer disposed so as to cover the side surface of the sealing layer; and a frame disposed on the outer peripheral edge portion of the solar cell module, in which the moisture absorbing layer, the outer peripheral edge portion of the surface protection member, the outer peripheral edge portion of the sealing layer, and the outer peripheral edge portion of the back surface protection member are embedded, the moisture absorbing layer is adhered to the inner wall of the frame via an adhesive layer having a water vapor permeation degree higher than that of the sealing layer.

2. The solar cell module according to claim 1, wherein the frame has: an inner side metal frame in which the moisture absorbing layer, the outer peripheral edge portion of the surface protection member, the outer peripheral edge portion of the sealing layer, and the outer peripheral edge portion of the back surface protection member are embedded; and an outer side resin frame disposed on the outer side of the inner side metal frame so as to cover the inner side metal frame, the inner side metal frame is formed of a metal material having a water vapor permeation degree lower than that of the surface protection member and the back surface protection member.

3. The solar cell module according to claim 2, wherein the inner side metal frame is formed of aluminum or stainless steel.

4. The solar cell module according to claim 2, wherein the inner side metal frame has a groove portion in which the moisture absorbing layer, the outer peripheral edge portion of the surface protection member, the outer peripheral edge portion of the sealing layer, and the outer peripheral edge portion of the back surface protection member are embedded, the groove portion being narrowed as it approaches the side of the solar cell element. ​

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