JP6272160B2 - Solar cell module - Google Patents

Description

  The present invention relates to a solar cell module.

  Photovoltaic power generation using a solar cell module may be used in the vicinity of a coast such as a lighthouse on a remote island.

  However, the solar cell module installed near the coast is exposed to a severer environment than the normal installation environment, for example, the scattered seawater tends to adhere directly. For this reason, in particular, since the junction box attached to the back surface of the solar cell module accommodates the conductive portion to which voltage is applied and the bypass diode, a structure that improves waterproofness is required.

  Thus, a structure has been proposed in which a connection box to which a cable is connected is covered with a box-shaped cover member (see, for example, Patent Document 1 below). In this structure, an opening provided in the cover member is closed with a sealing material, and a cable penetrating the sealing material is drawn to the outside of the cover member.

JP 2010-118394 A

  However, the cable lead-out portion of the sealing material is associated with the load generated when the cable is routed during the construction of the solar cell module, the external force such as the cable swinging due to wind after the construction of the solar cell module, and the temperature change of the surrounding environment. Stress concentration is likely to occur due to thermal expansion or contraction of the cable. For this reason, the hole of the sealing material which penetrated the cable may spread, and there is a possibility of causing water intrusion into the cover due to a capillary phenomenon or the like from a gap generated between the sealing material and the cable.

  Thus, although the waterproofness of the junction box is enhanced by the cover member, the cable lead-out portion of the sealing material is likely to be subjected to an external force and is easily affected by the surrounding environment such as a temperature change.

  Therefore, it is required to improve both the waterproofness and reliability of the cable lead portion in the cover member. One of the objects of the present invention is to provide a solar cell module with improved waterproofness and reliability.

A solar cell module according to an aspect of the present invention includes a solar cell panel, a housing that is disposed on a back surface side of the solar cell panel, and in which a conductor terminal that takes out the output of the solar cell panel is housed, The cable extends from the inside to the outside, covers the cable electrically connected to the conductor terminal, and at least a part of the housing, and covers the extending portion of the cable that extends to the outside of the housing. A cover member having a concave accommodating portion, and a sealing member for sealing between the cover member and each of the housing and the extension portion of the cable, and the cover The member has an overhanging portion that is close to the outer periphery of the cable in the direction intersecting the length direction of the cable inside the housing portion .

  According to the solar cell module having the above configuration, the external force applied to the sealing member is reduced, the adhesion at the bonding interface between the cable and the sealing member is maintained, and the waterproofness of the portion where the cable is drawn out from the cover member is improved. be able to.

  As a result, even when the solar cell module having the above-described configuration is installed in a harsh environment, it is possible to improve long-term waterproofness and reliability.

FIG. 1 is a diagram showing a solar cell module according to a first embodiment of the present invention, in which FIG. 1 (a) is a plan view seen from the light receiving surface side, FIG. 1 (b) is a back view, and FIG. ) Is a cross-sectional view showing a state where FIG. 1B is cut along the line AA ′. FIG. 2 is an exploded perspective view showing a stacked configuration of the solar cell module shown in FIG. FIG. 3 is a plan view showing the inside of the housing of the junction box constituting the solar cell module according to the first embodiment of the present invention. FIG. 4 is a diagram showing the solar cell module according to the first embodiment of the present invention. FIG. 4 (a) is an enlarged perspective view of a portion B shown in FIG. 1 (b), and FIG. 4 (b) is FIG. FIG. 4B is an exploded perspective view of the portion B in FIG. 4B, and FIG. 4C is a cross-sectional view showing a state cut along the line CC ′ in FIG. FIG. 5 is a perspective view showing a state in which the cover member of the solar cell module according to the first embodiment of the present invention is viewed from the bottom surface side. FIG. 6 is an exploded perspective view showing a solar cell module according to the second embodiment of the present invention. FIG. 7: is a perspective view which shows a mode that the cover member of the solar cell module which concerns on 3rd Embodiment of this invention was seen from the bottom face side. FIG. 8 is an exploded perspective view showing a solar cell module according to the fourth embodiment of the present invention. FIG. 9 is a diagram showing a solar cell module according to a fifth embodiment of the present invention, and FIG. 9A is a perspective view showing the solar cell module viewed from the back side, and FIG. FIG. 10 is an exploded perspective view of FIG. FIG. 10 is a view showing the solar cell module according to the sixth embodiment of the present invention, and is a cross-sectional view showing a portion corresponding to FIG. 4C of the solar cell module according to the first embodiment. FIG. 11 is a diagram showing a solar cell module according to the seventh embodiment of the present invention, and is an exploded perspective view corresponding to FIG. 4B of the solar cell module according to the first embodiment. FIG. 12 is a view showing a solar cell module according to the eighth embodiment of the present invention, and FIG. 12A is an exploded perspective view corresponding to FIG. 4B of the solar cell module according to the first embodiment. FIG. 12B is a cross-sectional view corresponding to FIG. 4C of the solar cell module according to the first embodiment. FIG. 13 is an exploded perspective view showing a solar cell module according to the ninth embodiment of the present invention.

  An embodiment of a solar cell module according to the present invention will be described with reference to the accompanying drawings. The drawings are schematically shown, and the size and positional relationship of various structures in each drawing can be appropriately changed.

<< Basic configuration of solar cell module >>
First, the basic configuration of the solar cell module according to the present invention will be described. As shown in FIGS. 1 and 2, the solar cell module has a solar cell panel 6. Solar panel 6
Is a plurality of solar cell element arrays (solar cell matrix 3) composed of a translucent substrate 1, a first filler 2 disposed mainly on the light receiving surface (front surface) side that receives light, and a plurality of solar cell elements 3. '), The second filler 4 disposed on the back surface side, and the back surface protection material 5 are sequentially laminated. The solar cell module includes a connection box 11 for taking out the electric power generated by the solar cell element 3 and a cover member 21 that covers the connection box 11.

  Below, the solar cell module which concerns on each embodiment is demonstrated.

<< First Embodiment >>
The solar cell module 1 according to the first embodiment will be described with reference to FIGS. First, the basic configuration of the solar cell module 1 will be described. The solar cell module 1 has a solar cell panel 6. On the back surface side of the solar cell panel 6, a housing 12 in which a conductor terminal 16 for taking out the output of the solar cell panel 6 is accommodated, and extends from the inside to the outside of the housing 12, and is electrically connected to the conductor terminal 16. The connected cable 15, and a cover member 21 that covers at least a part of the housing 12 and has a concave accommodating portion that covers the extended portion 15 a that extends to the outside of the housing 12 of the cable 15. A sealing member 25 that seals between the cover 12 and each of the housing 12 and the extended portion 15a of the cable 15 is disposed.

  Hereinafter, the components of the solar cell module 1 will be described.

<Translucent substrate>
As the translucent substrate 1, for example, a substrate made of glass or polycarbonate resin is used. As the glass plate, white plate glass, tempered glass, heat ray reflective glass or the like is used, and white plate tempered glass having a thickness of about 3 to 5 mm is preferable from the viewpoint of durability. On the other hand, when a substrate made of a synthetic resin such as polycarbonate resin is used as the translucent substrate 1, a substrate having a thickness of about 5 mm can be used.

<Filler>
The first filler 2 and the second filler 4 are made of, for example, an ethylene-vinyl acetate copolymer (hereinafter, ethylene-vinyl acetate copolymer is abbreviated as EVA), and a sheet having a thickness of about 0.4 to 1 mm. The thing of a shape form can be used. The first filler 2 and the second filler 4 are fused with each other and integrated with other members, for example, by applying heat and pressure under reduced pressure using a laminating apparatus. The first filler 2 may be made of transparent EVA. In addition, transparent EVA may be used for the second filler 4, but in addition to this, titanium oxide or a pigment may be included and colored white or the like in accordance with the installation environment around the solar cell module. Good.

<Solar cell element>
The solar cell element 3 is made of, for example, a single crystal or polycrystalline silicon substrate having a thickness of about 0.3 to 0.4 mm. Further, as a form other than such a silicon substrate, a thin film system made of amorphous silicon or the like, or a compound system form such as CIGS, which is laminated on a light-transmitting substrate such as glass, is appropriately selected. You can also. For example, electrodes may be disposed on the light receiving surface and the back surface of the solar cell element 3 having a pn junction therein, and an antireflection film may be disposed on the light receiving surface. As the solar cell element 3, for example, a rectangular polycrystalline silicon substrate having a side of about 100 to 150 mm in a plan view can be used.

  The solar cell elements 3 can be electrically connected in series or in parallel by the connection wiring 7 to constitute a solar cell string. In addition, the solar cell string constitutes a solar cell matrix 3 ′ by being electrically connected by the connection wiring 7 so as to form a matrix in a plan view, for example.

<Connection wiring>
As long as the connection wiring 7 can electrically connect the solar cell elements 3, the shape, material, and the like are not particularly limited. The connection wiring 7 is, for example, solder coated on the entire surface of a copper foil having a thickness of about 0.1 mm and a width of about 2 to 4 mm, which is cut into a predetermined length and soldered onto the electrode of the solar cell element 3 or the like. The form to attach is suitable.

<Back protection material>
The back surface protective material 5 has a function of reducing moisture from entering the solar cell element 3, the first filler 2, and the second filler 4. As the back surface protective material 5, for example, a fluorine-based resin sheet having weather resistance sandwiching an aluminum foil, or a polyethylene terephthalate (PET) sheet on which alumina or silica is deposited is used.

<Solar cell panel>
The solar cell panel 6 has an output conductor 8 for taking out the output from the solar cell element 3 (solar cell matrix 3 ′) to the outside. The output conductor 8 has a function of conducting electricity generated by the solar cell element 3 to the connection box 11. The shape and material of the output conductor 8 is not particularly limited as long as electrical connection can be realized. For example, the entire surface of a copper foil having a thickness of about 0.1 mm and a width of about 2 to 4 mm is solder coated. Is preferably cut into a predetermined length, and one end is soldered to the connection wiring 7 and the other end is soldered to the conductor terminal 16 in the connection box 11. Further, the output conductor 8 is inserted through the second filler hole portion 4 a and the back surface protection material hole portion 5 provided at predetermined positions of the second filler 4 and the back surface protection material 5 from the solar cell panel 6. Has been pulled out.

  Such a solar cell panel 6 is produced as follows. First, the laminated body which laminated | stacked the translucent board | substrate 1, the 1st filler 2, the solar cell matrix 3 ', the 2nd filler 4, and the back surface protection material 5 is set to a laminator apparatus. Then, under reduced pressure of about 50 to 150 Pa, the solar cell panel 6 is manufactured by applying pressure while heating at a temperature of about 100 to 200 ° C. for about 15 to 60 minutes and integrating the laminate. Then, the connection box 11 and the cover member 21 are attached on the back surface protective material 5 of the solar cell panel 6, and the solar cell module 1 is manufactured by electrically connecting the output conductor 8 and the connection box 11. Is done.

<Connection box>
Next, the form example of the junction box 11 and the cover member 21 will be described in detail. In the following description, the surface of the junction box 11 and the cover member 21 facing the back surface 6b of the solar cell panel 6 is referred to as the bottom surface, and the surface opposite to the bottom surface is referred to as the top surface. Further, the side facing the bottom surface of the connection box 11 is referred to as a bottom surface side, and the direction opposite to the bottom surface side is referred to as a top surface side.

  As shown in FIGS. 3 and 4, the connection box 11 includes a box-shaped housing 12 whose upper surface is opened and a lid body 13 that closes the opened upper surface of the housing 12. Further, in the connection box 11, the output conductor 8 drawn from the solar cell panel 6 through the hole on the bottom surface side of the housing 12 and the bypass diode 14 are electrically connected. Further, the output conductor 8 and the bypass diode 14 and the cable 15 are electrically connected. The inside of the junction box 11 is potted with a potting agent 17 such as a silicone sealant or an epoxy resin.

<Case>
The housing 12 has a box shape with an upper surface opened, and accommodates the output conductor 8, the bypass diode 14, the cable 15, the conductor terminal 16, and the like inside. Further, the cable 15 is taken out from the side surface of the housing 12.

  The housing 12 is made of, for example, an insulating resin material. Examples of the resin material include modified polyphenylene ether resin (modified PPE resin), polyphenylene oxide resin (PPO resin), acrylonitrile-butadiene-styrene copolymer resin (ABS resin), and the like. Moreover, the housing | casing 12 can be fixed to the predetermined position of the back surface side of the solar cell panel 6 using adhesives, such as a silicone sealant, on the back surface side.

<Cover body>
The lid 13 closes the opening on the upper surface of the housing 12. Such a lid 13 can be manufactured using the same material as that of the housing 12. Further, the lid 13 can be fixed to the housing 12 by adhesion, fitting, screws, or the like.

<Conductor terminal>
The conductor terminal 16 is electrically connected to the solar cell panel 6 and the cable 15. That is, the conductor terminal 16 electrically connects the output conductor 8 and the bypass diode 14 drawn from the solar cell panel 6 through the hole on the bottom surface side of the housing 12, and further connected to the cable. 15 is electrically connected. Such a conductor terminal 16 can be made of, for example, a copper alloy or stainless steel plate.

<Cable>
The cable 15 outputs the electric power generated by the solar cell panel 6 to the outside. The cable 15 may be a cross-linked polyethylene insulated vinyl sheath cable in which a wire made of a copper alloy or the like is covered with a cross-linked polyethylene and the outer periphery thereof is covered with a vinyl sheath. Hereinafter, the end portion of the cable 15 that extends from the housing 12 is referred to as an extension portion 15a. Further, a connector 15b is provided at the end of the cable 15 opposite to the extending portion 15a.

<Cover member>
As shown in FIGS. 4 and 5, the cover member 21 includes a box-shaped main body housing portion 22 whose bottom surface is opened so as to cover the connection box 11, and the length of the cable 15 so as to cover the extension portion 15 a of the cable 15. It has the accommodating part 23 swelled along the direction.

  Similar to the housing 12, such a cover member 21 is made of an insulating resin material. Examples of the resin material include modified PPE resin, PPO resin, ABS resin, and the like. In particular, since the cover member 21 and the housing 12 are made of the same material and have the same thermal expansion coefficient, the amount of displacement accompanying thermal expansion and contraction can be approximated. Thermal stress can be reduced.

  Moreover, the cover member 21 is good to be produced by integral molding. Thereby, since the cover member 21 has no seam which causes water immersion, waterproofness can further be improved.

<Main body housing part>
The main body accommodating portion 22 is a box-shaped portion that accommodates the housing 12 and the lid body 13 of the connection box 11. A space between the main body housing portion 22 and the housing 12 and the lid body 13 can be sealed with a sealing member 25 made of silicone resin or epoxy resin.

Moreover, the main body accommodating part 22 may have the main body accommodating part rib 22a extended toward inner side. The main body housing rib 22a suppresses the bias of the position of the connection box 11 within the main body housing section 22, and can separate the main body housing section 22 and the connection box 11 by an appropriate distance. The sealing member 25 having an appropriate thickness can be disposed on the entire circumference of the eleventh member. Thereby, since the thickness of the sealing member 25 can be managed, the sealing member 25 follows the thermal expansion / contraction caused by the temperature change between the casing 12 and the cover member 21 while elastically deforming and sealing. The member 25 can maintain adhesion to the inner wall of the housing portion 22 and the housing 12, and can improve waterproofness.

  Although the distance between the inner wall of the main body housing portion 22 and the housing 12 varies depending on the material of the sealing member 25, for example, when a silicone resin is used as the sealing member 25, the distance is preferably 2 mm or more. Moreover, the said distance is good to set it as 15 mm or less from a viewpoint of suppressing the usage-amount of the sealing member 25. FIG.

<Cable housing part>
The housing portion 23 of the cable 15 is a portion that narrows from the main body housing portion 22 and covers the extending portion 15 a along the longitudinal direction of the cable 15. The inner wall of the housing portion 23 facing the upper surface side of the cable 15 is formed in a similar shape to the cable 15, and has a structure in which the inner wall of the housing portion 23 and the upper surface side of the cable 15 are separated by a certain distance. For example, when the cross section of the cable 15 is circular, the inner wall of the accommodating portion 23 may be a concave shape having a U-shaped cross section. The sealing member 25 is filled with a certain distance along the longitudinal direction of the cable 15 between the inner wall of the housing portion 23 and the cable 15, so that the sealing member 25 is thermally expanded or heated in the longitudinal direction of the cable 15. Following the contraction, it can be elastically deformed to maintain adhesion.

  The distance between the cable 15 and the inner wall of the housing portion 23 is such that the sealing member 25 is elastically deformed by thermal expansion or contraction, and the adhesion between the surface of the cable 15 and the inner wall of the housing portion 23 is maintained. It is preferable to have a thickness of 1 mm or more so that it can.

  Moreover, since the inner wall of the accommodating part 23 facing the upper surface side of the cable 15 is formed in a concave shape along the surface of the cable 15, an external force is applied to the cable 15 in a direction orthogonal to the longitudinal direction thereof. The cable 15 is supported by the housing portion 23 when the portion 15 is bent at a portion protruding from the housing portion 23. Thereby, it is possible to suppress the deformation due to the bending of the cable 15 to the sealing member 25 in the main body housing portion 22, and to prevent the sealing member 25 and the cable 15 from peeling in the main body housing portion 23. Can be maintained.

  From this, since it becomes difficult to produce the clearance gap between the cable 15 and the sealing member 25, it can reduce that water infiltrates in the housing | casing 12 by a capillary phenomenon etc ..

  From the viewpoint of improving the adhesiveness between the housing portion 23 and the sealing member 25, the inner wall of the housing portion 23 is preferably provided with a texture. Further, from the viewpoint of improving the adhesiveness between the cable 15 and the sealing member 25, a surface treatment may be performed in which the extended portion 15a of the cable 15 is scrubbed with a flame and the surface thereof is oxidized. By this surface treatment, the sealing member 25 can maintain adhesion between the inner wall of the housing portion 23 and the surface of the cable 15 and maintain waterproofness. Such a housing part 23 is preferably provided over at least 5 mm along the longitudinal direction of the cable 15.

<Sealing member>
For the sealing member 25, it is preferable to use an adhesive having a property of adhering to the materials constituting the junction box 11 and the cover member 21, weather resistance, and being cured in a liquid state. Examples of such a sealing member 25 include an epoxy resin and a modified silicone resin. More preferably, the sealing member 25 becomes a rubber elastic body (Young's modulus at room temperature is about 1 to 10 MPa) after curing, and is displaced by vibration / impact after installation, thermal expansion / contraction of the connection box 11 and the cover member 21. It is preferable to use an elastic adhesive that maintains the adhesion by relaxing the stress concentration applied to the adhesion interface. As such a sealing member 25, a silicone resin is suitable, for example.

In addition, you may use the sealing member 25 which disperse | distributed the ceramic particle | grains in the inside (in said resin), and improved thermal conductivity. The heat generated in the connection box 11 is efficiently conducted to the cover member 21 through the sealing member 25 and dissipated from the surface of the cover member 21, so that the bypass diode 14 and the solder in the connection box 11 are dissipated. The attachment part can be protected. The ceramic particles preferably have insulating properties, and for example, aluminum nitride or alumina may be used as the material.

<Effects of First Embodiment>
As described above, the solar cell module 1 includes the sealing member 25 that seals between the housing 12, the extended portions 15 a of the cable 15, and the cover member 21. And the cover member 21 has the recessed accommodating part 23 along the surface of the cable 15 in the one or more site | parts which face the extension part 15a of the cable 15. FIG. Thereby, even if the cable 15 swings after the solar cell module 1 is installed, the load applied to the sealing member 25 in the main body accommodating portion 22 is reduced, and the cable 15 and the sealing member 25 are peeled at the bonding interface. Can be made difficult to occur.

  Therefore, the waterproofness and reliability of the solar cell module 1 can be improved.

<< Second Embodiment >>
As shown in FIG. 6, the solar cell module 1 according to the second embodiment supports the extended portion 15 a of the cable 15 from the side of the solar cell panel 6, and connects the back surface 6 b of the solar cell panel 6 and the cable 15. The solar cell module is different from the solar cell module according to another embodiment in that the support members 26 are provided apart from each other.

  The support member 26 has a concave receiving portion 26 a that matches the surface of the extended portion 15 a of the cable 15 on the side facing the back surface 6 b of the solar cell panel 6. For this reason, the receiving part 26a of the support member 26 can be supported by the extending part 15a of the cable 15, and the back surface 6b of the solar cell panel 6 and the cable 15 can be separated.

  According to the solar cell module 1 according to the second embodiment, the sealing member 25 is easily filled between the solar cell panel 6 and the cable 15. And it can prevent that the gap | interval used as the path | route of water immersion does not remain in the part which the solar cell panel 6 and the cable 15 adjoined.

  Furthermore, even if the cable 15 is swung by wind or the like, the support member 26 can reliably support the cable 15, so that the load applied to the sealing member 25 can be reduced and the waterproofness by the cover member 21 can be improved. .

<< Third Embodiment >>
As shown in FIG. 7, the cover member 21 configuring the solar cell module 1 according to the third embodiment intersects the outer periphery of the cable 15 in the length direction of the cable 15 inside the housing portion 23. It differs from the solar cell module according to the other embodiments in that it has an overhanging portion 24 that is close in the direction. The “proximal overhanging portion” refers to a portion that is closer to the cable 16 than other portions inside the housing portion 23. Further, the overhanging portion 24 may be in contact with the cable 16, and an inclusion may exist between the overhanging portion 24 and the cable 16.

  For example, a portion inside the housing portion 23 where the overhanging portion 24 is provided is a U-shaped slit having the same diameter as the outer diameter of the cable 15. When the overhanging portion 24 is close to the cable 15, the distance between the cable 15 and the housing portion 23 can be made constant in the housing portion 23, and the sealing member 25 can have a desired thickness.

  In addition, even when the cable 15 swings after the solar cell module 1 is installed, the load applied to the sealing member 25 inside the main body housing portion 22 is reduced, and the bonding interface between the cable 15 and the sealing member 25 is reduced. It can suppress peeling. Thereby, the thickness of the sealing member 25 can be managed, and rainwater is not drawn by the capillary phenomenon from the peeled portion of the adhesive interface, and the waterproofness by the cover member 21 can be enhanced.

<< Fourth Embodiment >>
As shown in FIG. 8, the solar cell module 1 according to the fourth embodiment is different from the solar cell module according to another embodiment in that the receiving portion of the support member 26 is formed in a cylindrical shape surrounding the outer periphery of the cable 15. Is different.

The support member 26 includes, for example, a planar first contact portion 26 b that contacts the back surface 6 b of the solar cell panel 6 and a curved second contact portion 26 c that contacts the inside of the housing portion 23. On the other hand, the cover member 21 has the overhang | projection part 24 which protruded from the inner wall of the accommodating part 23 as described in 3rd Embodiment. The support member 26 has a recessed portion 26 d that can engage with the overhang portion 24 provided in the cover member 21 in the second contact portion 26 c. The support member 26 can be fixed at a predetermined position of the housing portion 23 by engaging the protruding portion 24 provided on the cover member 21 with the recess 26 d of the support member 26. Further, the support member 26 may be provided with a cut 26 e in the length direction of the cable 15, for example. The cable 15 can be easily arranged at a desired position by deformation using the cut 26e of the support member 26. For the support member 26, for example, an elastically deformable synthetic rubber such as EPDM (ethylene / propylene / diene rubber) may be used. By disposing such a support member 26 inside the housing portion 23, the cable 15 can be reliably held, and even if the cable 15 swings due to wind or the like, a load applied to the sealing member 25 can be increased. This reduces the peeling between the cable 15 and the sealing member 25, and the waterproofness by the cover member 21 can be enhanced.

<< Fifth Embodiment >>
As shown in FIGS. 9A and 9B, the solar cell module 1 according to the fifth embodiment is different from the other embodiment in that a part 11a of the housing 12 extends outside the cover member 21. It is different from the solar cell module according to the embodiment.

  A part 11 a of the connection box 11 is extended to the outside of the cover member 21 from the side opposite to the side where the cable 15 extends to the outside of the cover member 21. As a result, a part 11a of the connection box 11 is in direct contact with the outside air, so that it is easy to be air-cooled, and heat generated by the bypass diode 14 accommodated in the connection box 11 is efficiently dissipated and bypassed. The diode 14 can be protected from deterioration due to heat. In addition, since the part of the junction box 11 other than the cable 15 is not flexible like the cable 15, deformation due to an external force such as wind hardly occurs. For this reason, it is easy to maintain the adhesion of the sealing member 25 between the junction box 11 and the cover member 21, and a decrease in waterproofness can be suppressed.

<< Sixth Embodiment >>
As shown in FIG. 10, the solar cell module 1 according to the sixth embodiment includes a first sealing member 25 a disposed in a portion corresponding to the side far from the housing 12 and a portion corresponding to the side close to the housing 12. And the second sealing member 25b disposed in the second sealing member 25b, and the second sealing member 25b has a lower rigidity after curing of the resin than the first sealing member 25a. Differs from module.

As shown in FIG. 10, the housing portion 23 is sealed with the first sealing member 25a having high rigidity after curing, and the main body housing portion 22 is sealed with the second sealing member 25b having low rigidity after curing. Has been. Examples of the first sealing member 25a include an epoxy resin, and the second sealing member 25b.
Examples thereof include silicone resins. The first sealing member 25a having high rigidity suppresses the swing of the cable 15 caused by wind or the like in the extending portion 15a of the cable 15, and reduces the load transmitted to the second sealing member 25b. Thereby, the stress concentration applied to the adhesion interface between the second sealing member 25b, the junction box 11 and the cover member 21 can be suppressed and adhesion can be maintained, and the waterproofness by the cover member 21 can be enhanced. it can.

In addition, the rigidity level can be estimated from the difference in the material of the resin. For example, JIS K7161
It can be easily measured by the tensile test of JIS K7181 or the compression test of JIS K7181.

<< Seventh Embodiment >>
As shown in FIG. 11, the solar cell module 1 according to the seventh embodiment is a solar cell according to another embodiment in that the space between the housing portion 23 and the cable 15 becomes narrower as the housing portion 23 moves away from the housing 12. Differs from module.

  The housing portion 23 includes a first housing portion 23a located on the side closer to the main body housing portion 22 and a second housing portion 23b located on the side farther from the main body housing portion 22 than the first housing portion 23a. Yes. And the space | interval of the cable 15 and the inner side of the accommodating part 23 is narrower in the 2nd accommodating part 23b than the 1st accommodating part 23a.

  Thereby, even when the cable 15 swings, the second housing part 23b can reliably support the cable 15 and can prevent the sealing member 25 inside the first housing part 23a from being deformed. As a result, peeling between the cable 15 and the sealing member 25 can be suppressed as much as possible, and the waterproofness by the cover member 21 can be enhanced.

<< Eighth Embodiment >>
As shown in FIGS. 12A and 12B, the solar cell module 1 according to the eighth embodiment closes the first opening 21 a and the first opening 21 a in the main body housing portion 22 of the cover member 21. It differs from the solar cell module which concerns on other embodiment by the point which has the 1st closure member 21b.

  On the upper surface side of the main body housing portion 22, there is a first opening 21 a sized to allow the lid 13 to be taken out, and the first opening 21 a is closed with a plate shape that is substantially the same size as the first opening 21 a. It has the 1st obstruction | occlusion member 21b which can do. The first opening 21a and the first closing member 21b can be fixed by, for example, a screw or an uneven engagement.

  Accordingly, the sealing member 25 can be efficiently filled in the cover member 21 in a short time, and the sealing member 25 can be densely filled into a corner portion where the structure is complicated, thereby improving workability. it can. In addition, after the cover member 21 is attached, if there is a contact failure or the like inside the connection box 11, the repair is easy, and the maintenance management of the solar cell module 1 is simplified.

  In addition, the 1st closure member 21b may have the rib 21c immersed in the sealing member 25 and adhere | attached on the main surface facing the 1st opening part 21a. Thereby, since the 1st closure member 21b is fixed with the sealing member 25, the screw or the engaging part etc. for fixing the 1st closure member 21b can be abbreviate | omitted, and it can be made a simple structure.

<< Ninth Embodiment >>
As illustrated in FIG. 13, the solar cell module 1 according to the ninth embodiment includes the second opening 23 c in the housing portion 23 of the cover member 21, and the second closing member that closes the second opening 23 c. It differs from the solar cell module which concerns on other embodiment by the point which has 23d.

The accommodating part 23 includes a box-shaped second opening 23c that can be filled with the sealing member 25, and a second opening 23c.
And a plate-like second closing member 23d capable of closing. The second opening 23c and the second closing member 23d are fixed by, for example, engaging the protrusion 23e provided on the side surface of the second opening 23c with a hook 23d1 provided on the side surface of the second closing member 23d. be able to.

  Thus, since the main body housing portion 22 for housing the connection box 11 and the housing portion 23 for housing the cable 15 are in separate sections, it penetrates the adhesive interface between the cable 15 and the sealing material 25 from the outside. In the case of water immersion, the housing portion 23 becomes the front chamber, so that the waterproofness of the main body housing portion 22 in which the connection box 11 is housed can be improved.

  Further, since the housing part 23 can visually seal the cable 15 from the second opening part 23c and can be tightly sealed with the sealing member 25 so that no gaps or the like remain, the waterproofness of the cover member 21 is improved. be able to.

<< Other variations >>
As mentioned above, this invention is not limited to the said embodiment, Many corrections and changes can be added within the scope of the present invention.

  For example, the cover member 21 may be provided with a small-diameter hole. As a result, when the cover member 21 is attached, the air trapped inside can easily escape and the sealing material 25 can be filled more densely. Moreover, since the sealing member 25 overflowing from the cover member 21 can be taken out from the hole, the sealing member 25 does not overflow from the housing portion 23 side and the appearance is not deteriorated. Further, a plug may be attached to the hole. Thereby, the waterproofness with respect to the water immersion from a hole can be improved.

  Needless to say, the present invention can combine the above-described embodiments as appropriate.

1: Solar cell module 1: Translucent substrate 2: First filler 3: Solar cell element 3 ′: Solar cell matrix 4: Second filler 4a: Second filler hole 5: Back surface protective material 5a: Back surface Protective material hole 6: solar cell panel 6a: light receiving surface 6b: back surface 7: connection wiring 8: output conductor 11: connection box 12: housing 12a: extension 13: lid 14: bypass diode 15: cable 15a: Extension part 15b: Connector 16: Conductor terminal 17: Potting agent 21: Cover member 21a: First opening 21b: First closing member 21c: Rib 22: Main body accommodation part 22a: Main body accommodation part rib 23: Accommodation part 23a: 1st accommodating part 23b: 2nd accommodating part 23c: 2nd opening part 23d: 2nd closing member 23d1: Hook 23e: Convex part 24: Overhang | projection part 25: Sealing member 25a: 1st sealing member 25b: 2nd Sealing member 6: support member 26a: receiving unit 26b: first contact portion 26c: second contact portion 26 d: recess 26e: cut

Claims (7)

A solar panel,
A housing that is disposed on the back side of the solar cell panel and contains a conductor terminal for taking out the output of the solar cell panel;
A cable extending from the inside to the outside of the housing and electrically connected to the conductor terminal;
A cover member that covers at least a part of the housing and has a concave accommodating portion that covers an extended portion of the cable that extends to the outside of the housing;
A sealing member that seals between the cover member and each of the housing and the extension portion of the cable ,
The said cover member is a solar cell module which has the overhang | projection part which adjoins in the direction which cross | intersects the length direction of the said cable with respect to the outer periphery of the said cable inside the said accommodating part .   The extension portion of the cable further includes a support member that matches the surface of the cable, and further includes a support member that separates the back surface of the solar cell panel and the cable at the reception portion. The solar cell module according to claim 1.   The solar cell module according to claim 2, wherein the receiving portion of the support member is cylindrical.   The solar cell module according to claim 1, wherein a part of the housing extends to the outside of the cover member.   The solar cell module according to claim 1, wherein the casing and the cover member are made of the same material.   The solar cell module according to claim 1, wherein the sealing member has a large number of ceramic particles dispersed therein.   The solar cell module according to claim 1, wherein an interval between the housing portion of the cover member and the cable is reduced as the housing portion is separated from the housing.