JP2016067173A - Terminal box and solar cell module using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal box excellent in reliability, by ensuring the thickness of an insulation member near a terminal arranged in the terminal box, and to provide a solar cell module.SOLUTION: A terminal box 5 includes a terminal 30, a body 5A having an opening and a bottom face 28 facing the opening, and internally housing the terminal 30, and a lid 5B having one principal surface 5Ba facing the bottom face 28, and covering the opening of the body 5A. Furthermore, in the terminal box 5, the lid 5B has a first region 35 located at a part facing the terminal 30 on one principal surface 5Ba, and provided with a protrusion 31 coming into contact with an insulation member 32 filling the inside of the body 5A so as to cover the terminal 30, and a second region 36 located other than the first region 35 on one principal surface 5Ba, not in contact with the insulation member 32.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a terminal box and a solar cell module using the terminal box.

  The solar cell module obtains a predetermined electrical output by connecting a plurality of solar cell elements in series or in parallel. This electrical output is output to the outside through a wiring material connected to the solar cell element. The wiring material is connected to the terminal part arrange | positioned inside the terminal box provided in the back surface side of the solar cell module.

  The terminal box has a main body and a lid that covers the opening on the upper surface of the main body. The inside of the main body is filled with an insulating member such as an insulating resin. Thereby, the terminal part arrange | positioned inside a main body is covered and protected by an insulating member (for example, refer patent document 1).

JP 2006-351606 A

  In the terminal box described above, the terminal portion is required to be sufficiently covered with the insulating member. However, for example, when a terminal box is manufactured, if a part of the insulating resin adheres to the back surface of the lid body, the resin may be sucked into the lid body from the adhesion portion. In this case, the insulating resin covering the terminal portion is also sucked at the same time, and as a result, the terminal portion is exposed from the insulating resin, and the reliability of the terminal box and the solar cell module may be lowered.

  One object of the present invention is to provide a terminal box and a solar cell module excellent in reliability by ensuring the thickness of an insulating member in the vicinity of a terminal portion disposed inside the terminal box.

  In the terminal box according to an embodiment of the present invention, the terminal box has a terminal portion, an opening portion, and a bottom surface portion facing the opening portion, a main body that houses the terminal portion therein, and a main body facing the bottom surface portion. A lid having a surface and covering the opening of the main body. Moreover, in this embodiment, the said cover body is located in the site | part facing the said terminal part on the said one main surface, and the protrusion which contacts the insulating member with which the inside of the said main body is filled so that the said terminal part may be covered And a second region that is located outside the first region on the one main surface and that is not in contact with the insulating member.

  A solar cell module according to an embodiment of the present invention is electrically connected to the terminal box, a solar cell panel in which the terminal box is disposed on one main surface, and the solar cell panel and the terminal portion. And an output conductor and a lead member electrically connected to the terminal portion.

In the terminal box and the solar cell module according to one embodiment of the present invention, by providing a protrusion that contacts the insulating member that fills the inside of the main body at a portion that faces the terminal portion on one main surface of the lid. In this protrusion, the insulating member near the terminal portion is easily sucked. Thereby, the thickness of the insulation member on the terminal part located in the site | part facing a projection part and the vicinity of a terminal part can be enlarged. As a result, since deterioration due to corrosion or the like of the terminal portion can be reduced, the reliability of the terminal box and the solar cell module is improved.

It is a top view which shows the whole solar cell module provided with the terminal box which concerns on one Embodiment of this invention, (a) is a top view which shows one Embodiment of the surface side of a solar cell module, (b) is a back surface It is a top view which shows one embodiment of the side. It is a top view which shows the solar cell element of the solar cell module which concerns on this embodiment, (a) is a top view which shows one Embodiment of the 1st surface side of a solar cell element, (b) is a 2nd surface side. It is a top view which shows one Embodiment. (A) is a top view which shows the state which connected the connection member to the solar cell element, (b) is sectional drawing which shows the connection state of two solar cell elements. It is the top view which looked at the connection state of the whole solar cell element of a solar cell module from the surface side. It is the enlarged plan view which looked at the A section of FIG. 4 from the back surface side. It is sectional drawing which shows the structure of a solar cell panel typically. (A) is a top view which shows the state inside the main body of a terminal box, (b) is a top view of the cover body inner surface side of a terminal box. (A) is a top view which shows the inside of the terminal box main body for showing the positional relationship of a projection part and a terminal part, (b) is a structure in the XX line of (a) of a terminal box typically. It is sectional drawing shown. It is sectional drawing which shows typically the state of the insulation member and protrusion part after the insulation member hardened | cured in the B section of FIG.8 (b). It is sectional drawing which shows typically the projection part of the cover body in the terminal box which concerns on other embodiment. It is sectional drawing which shows typically the projection part of the cover body in the terminal box which concerns on other embodiment.

  Hereinafter, embodiments of a terminal box and a solar cell module of the present invention will be described in detail with reference to the drawings.

≪Solar cell module≫
As shown in FIG. 1, a solar cell module 1 according to an embodiment of the present invention includes a solar cell panel 3 having a plurality of solar cell elements 2 and a frame 4 arranged on the outer periphery of the solar cell panel 3. Have. As shown in FIGS. 1A and 1B, the solar cell module 1 has a surface 1a that is a surface that mainly receives light and a back surface 1b that is located on the back side of the surface 1a. And the solar cell module 1 has the terminal box 5 in the back surface 1b of the solar cell module 1, as shown in FIG.1 (b). The terminal box 5 is provided with a lead member 6 for supplying electric power generated by the solar cell module 1 to an external circuit.

  As shown in FIGS. 2A and 2B, the solar cell element 2 has a substrate 7 made of, for example, single crystal or polycrystalline silicon. For example, the substrate 7 may be a rectangular shape having an outer dimension of about 100 to 170 mm square and a thickness of about 0.15 to 0.3 mm. Moreover, the solar cell element 2 has the 1st surface 2a which is a surface which mainly receives light, and the 2nd surface 2b equivalent to the back surface of this 1st surface 2a. Inside the solar cell element 2 is formed a PN junction (not shown) in which a P layer containing a large amount of P-type impurities such as boron and an N layer containing a large amount of N-type impurities such as phosphorus are in contact.

  As shown in FIG. 2A, the first surface electrode 8 and the second surface electrode 9 are formed on the first surface 2 a of the solar cell element 2. The second surface electrode 9 has a role of collecting photogenerated carriers, and a plurality of second surface electrodes 9 are formed so as to intersect the first surface electrode 8. For example, the second surface electrode 9 has a width of about 0.05 to 0.2 mm and is arranged with an interval of about 1 to 10 mm. The first surface electrode 8 has a role of collecting the photogenerated carriers collected by the second surface electrode 9. The first surface electrodes 8 have a width of about 1 to 3 mm, and are formed in a number of 2 to 5 in parallel with the sides of the solar cell element 2 with a constant interval. The first surface electrode 8 and the second surface electrode 9 are formed, for example, by screen-printing a conductive paste mainly composed of silver and baking it. The first surface 2a of the solar cell element 2 is provided with an antireflection film (not shown) that reduces light reflection.

  As shown in FIG. 2B, the first back electrode 10 and the second back electrode 11 are formed on the second surface 2 b of the solar cell element 2. The 2nd back surface electrode 11 is formed in the substantially whole surface of the 2nd surface 2b except about 0.5-3 mm of the outer peripheral part of the 2nd surface 2b. The second back electrode 11 is formed by, for example, screen-printing a conductive paste mainly composed of aluminum and firing it.

  The first back electrode 10 has a width of about 1 to 4 mm and is formed at 2 to 5 positions substantially opposed to the first surface electrode 8 with the substrate 7 interposed therebetween, and a part of the first back electrode 10 is the second. It is provided in contact with the back electrode 11. The first back electrode 10 is formed, for example, by screen-printing a conductive paste containing silver as a main component and firing it.

  In the solar cell module 1, the adjacent solar cell elements 2 are electrically connected by connecting members 12 (12a, 12b) as shown in FIGS. The connecting member 12 may be a highly conductive metal foil such as copper or aluminum having a thickness of about 0.1 to 0.3 mm. This metal foil is almost entirely coated with solder. This solder is provided to have a thickness of about 20 to 70 μm, for example, by plating or dipping. The width of the connecting member 12 may be equal to the width of the first surface electrode 8 or smaller than the width of the first surface electrode 8. Thereby, the connection member 12 can make it difficult to prevent the solar cell element 2 from receiving light.

  Moreover, in the two connection members 12 connected to one solar cell element 2, one connection member 12a is a first surface electrode on the first surface 2a of the solar cell element 2, as shown in FIG. Soldered to 8 The other connection member 12b is soldered to the first back electrode 10 on the second surface 2b of the solar cell element 2 so as to extend in the direction opposite to the connection member 12a.

  Moreover, as shown in FIG.3 (b), the adjacent solar cell element 2 (2a, 2b) is the other end part of the connection member 12 connected to the 1st surface electrode 8 of the 1st surface 2a of the solar cell element 2a. Is soldered to the first back electrode 10 on the second surface 2b of the solar cell element 2b. By repeating such connection to a plurality (for example, about 5 to 10) of solar cell elements, a solar cell element array (string 13) is formed in which a plurality of solar cell elements are linearly connected in series. Further, the connecting member 12 may be connected to substantially the entire surface of the first surface electrode 8 and the first back electrode 10. Thereby, the resistance component of the solar cell element 2 can be reduced. Here, when the solar cell element 2 uses a substrate 7 of about 150 mm square, the connecting member 12 may have a width of about 1 to 3 mm and a length of about 260 to 300 mm.

As shown in FIG. 4, the solar cell module 1 has a plurality of strings (strings 13a to 13f). These strings 13a to 13f are electrically connected at one end by a wiring member 14a. Moreover, these strings 13a-13f are electrically connected by the wiring member 14b in the other end part. Further, the wiring members 15 are electrically connected to the strings 13a and 13f located at both ends of the solar cell module 1, respectively. As shown in FIG. 4, the wiring member 15 is disposed so as to overlap a part of the wiring member 14 a via the insulating sheet member 16 when the solar cell module 1 is viewed in plan.

  The wiring member 14 (wiring members 14a and 14b) has a role of electrically connecting adjacent strings 13 with solder or the like. The wiring member 14 is disposed outside the string 13 in plan view of the solar cell module 1.

  The wiring member 15 has a role of taking out outputs from the plurality of strings 13. These wiring members 15 are connected to the first front surface electrode 8 or the first back surface electrode 10 of the solar cell elements 2t1 and 2t2 located on one end side of the strings 13a and 13f. Thereby, it is possible to take out an output increased by connecting the plurality of strings 13 in series.

  The insulating sheet member 16 is provided between the wiring member 14 a and the wiring material 15. Thereby, the insulating sheet member 16 has a role of preventing contact between the wiring member 14 a and the wiring member 15. Such an insulating sheet member 16 is made of, for example, a resin sheet having excellent insulation properties such as PET (polyethylene terephthalate), PE (polyethylene) or PP (polypropylene) having a thickness of about 0.05 to 0.3 mm. It is formed by cutting into strips.

  As shown in FIG. 5, an output lead-out line (output conductor) 17 is connected to the end of each wiring member 15 located on the center side of the solar cell module 1. The output lead-out line 17 is electrically connected to the lead member 6 inside the terminal box 5.

  In addition, a bypass line 18 is connected to the end portions of the two wiring members 14 a located on the center side of the solar cell module 1. The bypass line 18 is connected to a bypass diode 25 provided in the terminal box 5.

  Further, when the solar cell module 1 is viewed in plan, a protective sheet member 19 having insulating properties is provided between the output lead-out line 17 and the bypass line 18 and the solar cell element 2. Thereby, generation | occurrence | production of the short circuit which arises between the output derivation | leading-out line 17 and the bypass line 18, and the solar cell element 2 is reduced.

  The wiring members 14 a and 14 b, the wiring member 15, the output lead-out line 17, and the bypass line 18 described above can be made of the same material as the connection member 12. In addition, what is necessary is just to set suitably dimensions, such as the width | variety and thickness of each member. The protective sheet member 19 can be the same as the insulating sheet member 16. What is necessary is just to set dimensions, such as the width | variety and thickness of this protective sheet member 19, suitably. In addition, you may arrange | position the sheet | seat material similar to the back surface side filler which consists of an ethylene-vinyl acetate copolymer etc. which are mentioned later between the protection sheet member 19 and the solar cell element 2. FIG. Thereby, the adhesiveness of the protection sheet member 19 and the solar cell element 2 increases.

  As shown in FIG. 6, the solar cell panel 3 includes a plurality of solar cell elements 2 in which a surface-side filler 21 is disposed on a translucent substrate 20 and connected as described above. 21, and a back surface side filler 22 and a back surface sheet 23 are sequentially laminated thereon to produce a laminate 24, and then the laminate 24 is laminated and integrated as described later. is there.

  As the translucent substrate 20, a substrate made of glass or polycarbonate resin is used. Here, as glass, white plate glass, tempered glass, double tempered glass, heat ray reflective glass etc. are used, for example. In the case of a resin, a synthetic resin such as a polycarbonate resin is used. The translucent substrate 20 may be about 3 mm to 5 mm in thickness.

  The front side filler 21 and the back side filler 22 are made of an ethylene-vinyl acetate copolymer (hereinafter abbreviated as EVA) or polyvinyl butyral (PVB), and have a thickness of about 0.4 to 1 mm by a T-die and an extruder. What was shape | molded in the sheet form is used. These are heated and pressed under reduced pressure by a laminating apparatus, and are softened and fused to be integrated with other members. Note that EVA or PVB used for the back surface side filler 22 may be transparent. Moreover, EVA or PVB used for the back surface side filler 22 may contain titanium oxide, a pigment, or the like in accordance with the surrounding installation environment where the solar cell module 1 is installed, and may be colored white or the like.

  The back sheet 23 has a role of reducing moisture intrusion from the outside. As this back surface sheet 23, for example, a fluorine resin sheet having weather resistance with an aluminum foil sandwiched, a polyethylene terephthalate (PET) sheet on which alumina or silica is vapor-deposited, or the like is used.

  The back surface side filler 22 and the back surface sheet 23 are formed with slits 26 at predetermined positions, and when the laminated body 24 is produced, the output lead-out line 17 and the bypass line 18 are passed through the slit 26 and the back surface sheet 23. Keep it on the outside.

  Thus, the output lead-out line 17 and the bypass line 18 led out to the outside on the back surface 1 b side of the solar cell panel 3 are introduced into the terminal box 5. After introducing the output lead-out line 17 and the bypass line 18 into the terminal box 5, the outer surface of the bottom part of the terminal box 5 is coated with a silicone sealant or an epoxy adhesive and adhered to the outer surface of the back sheet 23, Fixed.

≪Terminal box≫
Next, the structure of the terminal box 5 according to the present embodiment will be described in detail.

  As shown in FIGS. 7A and 7B, the terminal box 5 includes a main body 5A and a lid 5B. The main body 5A and the lid 5B are made of an insulating resin that can withstand long-term use of the solar cell module outdoors, and may be formed of, for example, a modified PPE (poly phenylene ether) resin. The main body 5A is manufactured by an injection molding method in which a molten resin is cured after being put in a mold.

  As shown in FIG. 7A, the main body 5A is a box-like body having an outer wall portion 27, a bottom surface portion 28, and a through portion 29. In addition, the main body 5 </ b> A is provided with an opening in an upper portion facing the bottom surface portion 28. The bottom surface portion 28 of the main body 5 </ b> A is formed so as to cover an area of about ¼ to ½ of the bottom portion surrounded by the outer wall portion 27. Moreover, the thickness of the bottom face part 28 should just be about 2-5 mm. A terminal portion 30 is provided on the bottom surface portion 28. Thereby, the terminal part 30 is accommodated in the inside of the main body 5A.

  The terminal part 30 is electrically connected to the output lead-out line 17 and the bypass line 18 introduced into the main body 5 </ b> A via the through part 29. As the terminal portion 30, for example, a highly conductive metal plate such as copper or brass having a thickness of about 0.3 to 1.0 mm plated with tin or the like can be used. Further, the terminal portion 30 is manufactured in a square shape or a rectangular shape in consideration of the size of the bottom surface portion 28 of the main body 5A, and is fixed by screwing, fitting, or the like to the bottom surface portion 28.

The output lead-out line 17 and the bypass line 18 are connected to the terminal portion 30 by soldering or the like. Further, as shown in FIG. 7, the bypass diode 25 is connected so as to straddle the adjacent terminal portions 30. The lead member 6 is connected to the terminal portion 30 to which the output lead-out line 17 is connected. Therefore, as many terminal portions 30 as the number of output lead-out lines 17 and bypass lines 18 introduced into the terminal box 5 are provided. The bypass diode 25 is, for example, an axial lead type, and is fixed to the terminal portion 30 by soldering or screwing. The lead member 6 is attached to the terminal portion 30 by screwing or soldering after the crimp terminal is attached to the end portion.

  The lid 5B covers the opening on the upper surface of the main body 5A. Therefore, the lid 5B has a shape that matches the shape of the opening on the upper surface of the main body 5A. Such a lid 5B is fixed to the upper surface of the main body 5A by screwing or fitting such as fitting. The thickness of the lid 5B is about 1 to 5 mm. Further, as shown in FIG. 7B, the lid body 5B is provided with a protruding portion 31 on one main surface 5Ba facing the bottom surface portion 28 of the main body 5A. Further, the outer peripheral portion 5Bb of the lid 5B has a thickness that is 1 to 5 mm larger than other portions. Thereby, the intensity | strength of the cover body 5B can be raised. The outer peripheral portion 5Bb having a large thickness is formed with a width of 1 to 5 mm from the end of the lid 5B toward the inside. The lid 5B is also produced by an injection molding method or the like, similar to the main body 5A.

  Further, an insulating member 32 is filled in the main body 5A. As shown in FIG. 8 (b), the insulating member 32 is filled to a position equivalent to the height of the inner wall portion 33 at a position spaced about 2 to 5 mm inward from the outer wall portion 27. In the terminal box 5, a recess 34 is provided between the outer wall portion 27 and the inner wall portion 33 in which the overflowing insulating member 32 enters. Thereby, even when the insulating member 32 filled in the main body 5 </ b> A enters more than the specified amount, the surplus insulating member 32 flows into the recess 34. As a result, the occurrence of leakage to the outside of the terminal box 5 due to overfilling of the insulating member 32 can be reduced. Moreover, since it becomes easy to maintain the clearance between the main surface 5Ba of the lid 5B and the insulating member 32, damage to the terminal box 5 due to expansion of the insulating member 32 can be reduced when the terminal box 5 becomes high temperature. The outer wall 27 of the main body 5A may have a thickness of about 1 to 4 mm, and the inner wall 33 may have a thickness of about 1 to 2 mm.

  The insulating member 32 is filled in a fluid state before curing after connecting the output lead-out line 17, the bypass line 18, the bypass diode 25 and the terminal portion 30. At this time, the insulating member 32 is injected to a height that is about 0.5 to 3 mm lower than the height of the inner wall portion 33 inside the main body 5A. Thereby, the insulating member 32 is filled inside the main body 5 </ b> A so as to cover the terminal portion 30. As a result, the connection portion between the output lead-out line 17, the bypass line 18, the bypass diode 25 and the terminal portion 30 can be protected by the insulating member 32. For the insulating member 32, for example, a highly insulating resin is used. As such a resin, for example, a silicone resin, an epoxy resin, a phenol resin, or the like can be used.

  As shown in FIGS. 8A and 8B, the protrusion 31 of the lid 5B is provided so as to protrude toward the terminal portion 30 from the one main surface 5Ba of the lid 5B. The protrusion 31 is a surface of the insulating member 32 in which the tip of the protrusion 31 is disposed inside the main body 5A when the lid 5B is fitted into the opening of the main body 5A with the insulating member 32 uncured. It is provided so as to be in contact with 32L or buried in the insulating member 32. Further, as shown in FIG. 8A, the protrusion 31 is provided on the lid 5B so as to be positioned at least at a portion 31f facing the terminal portion 30 disposed inside the main body 5A.

  As shown in FIG. 9, in the lid 5 </ b> B, the protrusion 31 contacts the insulating member 32, but does not contact the insulating member 32 in a region other than the protrusion 31. That is, one main surface 5Ba of the lid body 5B is provided with the first region 35 provided with the protrusion 31 that contacts the insulating member 32, and the second portion where the insulating member 32 is not in contact with the portion other than the first region 35. An area 36 exists.

In the terminal box 5, as shown in FIG. 9, the uncured insulating member 32 that is in contact with the protrusion 31 is attracted to the protrusion 31 by the action of surface tension or the like. Thereby, the thickness of the insulating member (insulating member 32t) in the vicinity of the first region 35 is increased. On the other hand, as the insulating member 32 is sucked by the protrusion 31 as described above, the thickness of the portion facing the second region 36 where the protrusion 31 is not provided is reduced. Thus, in this embodiment, by providing the protrusion 31 on the lid 5B, the thickness of the insulating member 32 in the vicinity of the terminal portion 30 and the insulating member in other portions (for example, the region between the adjacent terminal portions 30). The thickness of 32 is controlled. Therefore, in the terminal box 5, since the thickness of the insulating member 32 above the terminal portion 30 can be increased, deterioration due to corrosion of the terminal portion 30 can be efficiently reduced. As a result, the reliability of the terminal box 5 and the solar cell module 1 can be improved.

  Furthermore, in the terminal box 5, since the insulating member 32 is cured in a state where it is attached to the protrusion 31 of the lid 5B, the lid 5B can be firmly fixed to the main body 5A. Thereby, the reliability of the terminal box 5 and a solar cell module can be improved more.

  As shown in FIG. 8A, the protruding portion 31 located on the terminal portion 30 may be located inside the outer peripheral portion of the terminal portion 30 when viewed in plan. Thereby, the thickness of the insulating member 32 of the part directly above the terminal part 30 and its vicinity part can be enlarged accurately. In such a case, the width of the protruding portion 31 only needs to be smaller than the width of the terminal portion 30. Specifically, if the width of the terminal portion 30 is about 5 to 15 mm, the width of the protruding portion 31 may be about 0.5 to 3 mm, for example.

  In addition, when a plurality of terminal portions 30 are arranged, a plurality of protrusion portions 31 may be arranged so as to correspond to each terminal portion 30. Thereby, in such a form, the thickness of the insulating member 32 in each terminal part 30 upper part can be selectively enlarged. Therefore, each terminal part 30 can be easily protected by the insulating member 32. In the present embodiment, as shown in FIGS. 7B and 8A, a protrusion 31 (protrusion 31 a) may also be provided at a portion facing the bypass diode 30. Thereby, the bypass diode 30 can be easily protected by the insulating member 32.

  The lid body 5B may further include a connecting portion 37 having a height smaller than that of the protruding portion 31 while connecting the protruding portions 31 adjacent to each other on one main surface 5Ba. Thereby, the mechanical strength of the protrusion 31 can be increased. As a result, with such a configuration, it is possible to reduce deformation of the protrusion 31 that may occur due to long-term use outdoors. Such a connection part 37 is formed, for example so that two adjacent projection parts 31 may be tied. The width of the connecting portion 37 is, for example, about 0.5 to 3 mm. Further, the connecting portion 37 is formed with a length that does not contact the insulating member 32.

  Further, as shown in FIG. 10, the protrusion 31 may have a structure in which the minimum width 31M on the tip side is larger than the minimum width 31N on the one main surface side 5Ba. Thereby, since it becomes easy to obtain an anchor effect after hardening of the insulating member 32, the lid 5B can be more firmly fixed to the main body 5A. In addition, the anchor effect described above can be further improved by providing a convex portion 38 projecting outward on the side surface 31T of the projection portion 31 as shown in FIG.

≪Solar cell module manufacturing method≫
A method for manufacturing the solar cell module 1 according to this embodiment will be described.

  First, a plurality of solar cell elements 2 are prepared. Next, the plurality of solar cell elements 2 are connected to each other by the connecting member 12, and, for example, six strings 13 (strings 13a to 13f) are manufactured.

Next, the strings 13a to 13f are arranged substantially in parallel with an interval of about 3 to 10 mm with the second surface 2b side of the solar cell element 2 facing upward, and among the strings 13a and 13f, The connecting members 12 connected to the solar cell elements 2 located at one end of a pair of adjacent strings 13 are connected to the wiring member 14b by soldering.

  Next, the connection members 12 connected to the solar cell elements 2 positioned at the other end portions of the strings 13b and 13c are connected to the wiring members 14a by soldering. Similarly, the wiring member 14a is also connected to the connection members 12 connected to the solar cell elements 2 located at the other end of the string 13d and the string 13e.

  Next, as shown in FIG. 5, the bypass wire 18 is connected to each end of the wiring member 14a by solder. Next, the protective sheet member 19 is disposed between the bypass line 18 and the solar cell element 2. Next, the insulating sheet member 16 is disposed on the wiring member 14a.

  Next, the wiring member 15 is disposed under the connection member 12 connected to the solar cell elements 2t1 and 2t2 of the strings (string 13a and string 13f) located at both ends of the plurality of strings 13. At this time, the wiring member 15 is disposed so as to overlap with a part of the wiring member 14 a via the insulating sheet member 16 in plan view. Next, the connection member 12 connected to the solar cell elements 2t1 and 2t2 and the wiring member 15 are connected by solder. Further, the output lead-out line 17 is connected to each end portion of the wiring member 15 with solder.

  Next, the above-mentioned translucent substrate 20, the front surface side filler 21, the back surface side filler 22, and the back surface sheet 23 are prepared. Then, as shown in FIG. 6, after the surface side filler 21 is arrange | positioned on the translucent board | substrate 20, the wiring members 14a and 14b and the wiring material 15 were connected on the surface side filler 21, and the string 13a-13f And a back surface side filler 22 and a back surface sheet 23 are sequentially stacked thereon to produce a laminate 24.

  Next, the solar cell panel 3 can be produced by setting the laminate in a laminating apparatus and heating at 100 to 200 ° C., for example, for 15 minutes to 1 hour while applying pressure under reduced pressure. Thereafter, the frame 4 is attached to the outer peripheral portion of the solar cell panel 3, and the terminal box 5 is mounted on one main surface (back surface 1 b) located on the back side, and the output lead-out line 17, the bypass line 18 and the terminal part 30 are soldered. Connect it electrically. Finally, the solar cell module 1 is completed by electrically connecting the lead member 6 to the terminal portion 30 with solder.

  Thus, in the solar cell module 1 according to the present embodiment, as described above, since the reliability of the terminal box 5 can be increased, the long-term reliability of the solar cell module 1 can be improved.

  In addition, 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, a solar cell element used in a solar cell module is a back contact type solar cell element in which both positive and negative electrodes are arranged on the second surface 2b side, or a thin film solar cell element using a chalcogen compound semiconductor. The connection between the electrode of the solar cell element 2 and the connection member 12, and the connection between the connection member 12, the wiring material 15, the output lead-out line 17, and the bypass line 18 are also soldered. In addition, a conductive adhesive such as an epoxy resin, a phenol resin, or a silicone resin mixed with a good conductive filler such as silver or copper may be used.

1: Solar cell module 1a: Front surface 1b: Back surface 2, 2t1, 2t2: Solar cell element 2a: First surface 2b: Second surface 3: Solar cell panel 4: Frame 5: Terminal box 5A: Main body 5B: Lid 5Ba : One main surface 5Bb: outer peripheral part 6: lead member 7: substrate 8: first surface electrode 9: second surface electrode 10: first back electrode 11: second back electrode 12: connecting members 13, 13a to 13f: string 14a, 14b: Wiring member 15: Wiring material 16: Insulating sheet member 17: Output lead-out line 18: Bypass line 19: Protective sheet member 20: Translucent substrate 21: Front side filling material 22: Back side filling material 23: Back side Sheet 24: Laminated body 25: Bypass diode 26: Slit 27: Outer wall portion 28: Bottom surface portion 29: Through portion 30: Terminal portion 31: Projection portion 32: Insulating member 33: Inner wall portion 34: Recess 35: First region 36: 2nd area | region 37: Connection part 38: Convex part

Claims (7)

A terminal section;
A main body that has an opening and a bottom face that faces the opening, and that houses the terminal part therein,
A lid that has one main surface facing the bottom surface and covers the opening of the main body,
The lid is located at a portion facing the terminal portion on the one main surface, and is provided with a protrusion that contacts an insulating member filled in the main body so as to cover the terminal portion. A terminal box having a region and a second region that is located outside the first region on the one main surface and does not contact the insulating member.   2. The terminal box according to claim 1, wherein the protruding portion located on the terminal portion is located on an inner side than an outer peripheral portion of the terminal portion when seen in a plan view.   3. The terminal box according to claim 1, wherein when the plurality of terminal portions are arranged, a plurality of the protruding portions are arranged so as to correspond to the respective terminal portions.   The terminal box according to claim 3, wherein the lid body further includes a connecting portion that connects the protruding portions adjacent to each other on the one main surface and has a height smaller than the height of the protruding portion.   5. The terminal box according to claim 1, wherein the protrusion has a minimum width on a tip side larger than a minimum width on the one main surface side.   The terminal box according to any one of claims 1 to 5, wherein a convex portion projecting outward is provided on a side surface of the projection portion. A terminal box according to any one of claims 1 to 6;
A solar panel in which the terminal box is arranged on one main surface;
An output conductor electrically connected to the solar cell panel and the terminal portion;
And a lead member electrically connected to the terminal portion.

Images