JP2002289895A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a solar cell module which can enhance the mounting strength of a terminal box, which is thin and whose durability is superior. SOLUTION: The solar cell module is provided with a module body 12 and the terminal box 13. In the body 12, a photovoltaic cell 22, which is installed so as to be laminated on the rear of a transparent substrate 21, is sealed with a filler 14; the filler is covered with a sealing cover 26; an output derivation wire 25, which is electrically connected to the photovoltaic cell 22, is installed so as to pass the sealing cover 26; and the wire 25 is formed so as to be covered with another sealing cover 27, in such a way that a through part 29 of the wire 25 will not come into contact with the open air. A part of the sealing cover 27 is extended to the outer side from the circumferential face 12a of the body 12. The terminal box 13 comprises a terminal fitting 33, to which the wire 25 and the terminal part of an external wire and cable 41 are connected. The terminal box 13 is bonded to an extension part 27a of the sealing cover 27 and the peripheral face 12a, and the terminal box 13 is attached sideways to the module body 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell module in which a terminal box for guiding electric power generated by the main body to an external electric cable is attached to a module main body for photovoltaic power generation.

[0002]

2. Description of the Related Art Many solar cell modules having a terminal box are disclosed in Japanese Utility Model Laid-Open No. 1-125761 and Japanese Patent Laid-open No. Hei 11-2.
As shown in Japanese Patent No. 6035 or the like, a terminal box is overlapped and adhered to the back surface of a module main body that performs solar power generation.
The terminal fitting provided in the terminal box is connected to an output lead wire of the module main body which is drawn through the back surface of the module main body, and a terminal portion of the external electric cable inserted into the terminal box. Is connected. These connection portions are hermetically sealed with a potting resin such as a silicone resin filled in the terminal box.

[0003] Further, in a double-layer glass in which a solar power generation device is incorporated in an air layer formed by interposing a spacer between two sheet glasses, a terminal box may be bonded to a part of the peripheral surface thereof. JP-A-11-35346, U.S. Pat.
No. 61740 is known.

[0004]

The outer wire cable connected to the terminal fitting of the terminal box has to be 6.4 mm in outer diameter due to regulations such as the Electrical Appliance and Material Control Law. Therefore, it is very difficult to make the thickness of the terminal box at most about 10 mm or less. Therefore, in the configuration in which the terminal box is bonded to the back surface of the module main body as described above, it is inevitable that the maximum thickness of the solar cell module increases according to the thickness of the terminal box. For example, when the thickness of the module main body is 5 mm, the maximum thickness of the solar cell module is 16 mm in consideration of the thickness of the adhesive layer of the terminal box to the main body. A solar cell module having a large thickness is disadvantageous because a large thickness is required for the tile, for example, when it is incorporated into a tile.

When the arrangement of the terminal box in the double-layer glass is applied to a solar cell module, the entire thickness of the terminal box adhered to the peripheral surface of the module body affects the thickness of the solar cell module. To be able to
This is preferable in that the maximum thickness of the module can be reduced.
However, since the thickness of the module main body is not so large, the mounting strength of the terminal box fixed only by using an adhesive on its peripheral surface is low. Since solar cell modules are used in harsh outdoor environments, such as on roofs exposed to the weather, low terminal box mounting strength as described above will ensure that the terminal box will remain in a stable mounting state for long-term use. Poor.

In addition, in the configuration in which the terminal box is bonded to the peripheral surface of the module main body, the output lead wire connected to the terminal fitting in the box protrudes from the peripheral surface of the main body within the thickness range of the module main body. It is drawn into the box. In this configuration, since the lead-in path of the output lead wire into the terminal box is straight, when the adhesive performance between the peripheral surface of the module body and the terminal box is reduced and the output lead wire comes into contact with the outside air, It is conceivable that moisture easily penetrates into the module main body along the output extraction line, causing corrosion of the solar cell and impairing durability.

An object of the present invention is to provide a solar cell module which can improve the mounting strength of a terminal box, is thin and has excellent durability.

[0008]

According to the first aspect of the present invention,
While sealing the solar cells provided by lamination on one surface of the transparent substrate with a filler, the filler is attached with a sealing cover, and an output lead line electrically connected to the solar cells is provided. A module main body provided with the sealing cover and penetrating the output extraction line with another sealing cover so that a penetration portion of the output extraction line does not come into contact with the outside air, and the output extraction line and It is assumed that the solar cell module includes a terminal box to which the terminal portions of the external electric cable are respectively connected, and a terminal box attached to the module main body.

According to another aspect of the present invention, at least a part of the other sealing covers of the two sealing covers extends outward from a peripheral surface of the module body. The terminal box is adhered to the extension portion and the peripheral surface, and the terminal box is laid sideways on the module body.

[0010] In the invention according to the first aspect, an adhesive portion extending from the peripheral surface of the module main body to an inner region and adhered to the other sealing cover, and similarly, to an inner region from the peripheral surface of the module main body. It does not preclude that at least one of the adhesive portions extending and adhered to the other surface of the transparent substrate is auxiliaryly provided so as to protrude from the terminal box. This is preferable in that the strength of attaching the terminal box to the peripheral portion of the module body can be further increased.

In the invention according to the first aspect, the terminal box is laid laterally outside the peripheral portion of the module main body without overlapping in the thickness direction of the module main body, so that the maximum thickness of the module can be reduced. The terminal box is bonded not only to the peripheral surface of the module main body but also to the extension of the sealing cover of the main body, so that the bonding area to the module main body is large. In addition, since the output lead wire penetrates the sealing cover and is covered by another sealing cover including the penetrating portion, the moisture from the terminal box to the solar cell along the output lead wire is reduced. Is long and the path is bent, so that it is easy to prevent moisture from entering the module body for a long time.

The invention according to claims 2 and 3 is characterized in that the solar battery cells laminated on one surface of the transparent substrate are sealed with a filler, and the filler is covered with a sealing cover.
A module main body provided with an output lead wire electrically connected to the solar cell penetrating the sealing cover, and terminal fittings to which the output lead wire and a terminal portion of an external electric cable are respectively connected. It is assumed that the solar cell module includes a terminal box attached to the module body.

[0013] In order to solve the above-mentioned problem, the invention according to claim 2 is characterized in that the terminal box accommodates the terminal fittings and has a box main part to which the external electric cable is attached; A lead-out line cover that protrudes and is formed thinner than the box main part and covers an output lead-out line reaching the box main part, wherein the box main part is adhered to the peripheral surface of the module main body and the lead-out line cover The terminal box is laterally attached to the module body by bonding a portion to the sealing cover.

In the invention according to the second aspect, the bonding portion extending from the peripheral surface of the module main body to the inner region and bonded to the other surface of the transparent substrate is provided by projecting from the terminal box in an auxiliary manner. Is not a hindrance. This is preferable in that the strength of attaching the terminal box to the peripheral portion of the module body can be further increased.

[0015] In the invention according to claim 2, a portion of the terminal box having the largest thickness, that is, a main portion of the box in which terminal fittings to which the output lead wire and the terminal portion of the external electric cable are respectively connected are housed. Was placed on the outside of the periphery of this module without overlapping in the thickness direction of the module body,
The maximum thickness of the module can be reduced. The terminal box not only adheres the main part of the box to the peripheral surface of the module main body, but also attaches the lead-out wire cover protruding from the main part of the box to the sealing cover of the module main body. Adhesive area is large. In addition, since the output extraction line penetrates the sealing cover and is covered by the extraction line cover including the penetrating portion, the moisture from the terminal box to the solar cell along the output extraction line can be reduced. Is long and the path is bent, so that it is easy to prevent moisture from entering the module body for a long time.

According to another aspect of the present invention, there is provided a semiconductor device comprising:
According to the invention, the module main body is provided with a terminal box attaching portion extending outward from a peripheral surface thereof, and the terminal box accommodates the terminal fitting and a box main portion to which the external electric cable is attached. An extraction line cover portion projecting from the box main portion and formed to be thinner than the box main portion and covering an output extraction line reaching the box main portion, and fixing the box main portion to the terminal box mounting portion. Further, the terminal line box is laterally attached to the module body by bonding the take-out line cover portion to the sealing cover.

In the third aspect of the present invention, the terminal box mounting portion can be provided on the module main body by bonding, and in this case, the material is not limited. In addition, the terminal box mounting portion can be provided by bonding a part thereof to the filler along with the lamination process by inserting the part into the filler,
In this case, it is preferable to use a terminal box mounting portion made of an electrically insulating material. In addition, if the terminal box mounting portion is provided with a terminal box fixing portion that bends from the bonding portion to the module main body to the transparent substrate side, extends substantially parallel to the bonding portion, and protrudes to the outside of the module main body, This is preferable in that the module can be made thinner. In addition, the terminal box mounting portion is preferably made of a hard material, and the terminal box is fixed to the terminal box mounting portion by bonding using an adhesive.
Or it can be carried out by screwing or the like. Further, a part of the sealing cover of the module main body can be extended and used for the terminal box mounting portion. In this case, it is preferable that the base of the terminal box mounting portion is bonded to the peripheral surface of the module main body.

According to the third aspect of the present invention, the portion of the terminal box having the largest thickness, that is, the main portion of the box housing the terminal fittings to which the output lead wires and the terminal portions of the external electric cable are respectively connected. Is fixed to the terminal box mounting portion projecting outward from the peripheral portion of the main body without being overlapped in the thickness direction of the module main body, so that the maximum thickness of the module can be reduced. The terminal box not only has its box main part fixed to the terminal box mounting part, but also has a take-out wire cover part protruding from the box main part adhered to the sealing cover of the module main body, and thus attached to the module main body. Large mounting area for In addition, since the output extraction line penetrates the sealing cover and is covered by the extraction line cover including the penetrating portion, the moisture from the terminal box to the solar cell along the output extraction line can be reduced. Is long and the path is bent, so that it is easy to prevent moisture from entering the module body for a long time.

In each of the above inventions, the solar cell that performs photoelectric conversion may be an amorphous type having an amorphous semiconductor, a crystalline type having a single crystal semiconductor or a polycrystalline semiconductor, or the like. . In addition, the solar cell module (photoelectric conversion module) of the present invention can be applied to a photovoltaic power generation that is installed on a roof or on the ground, and can be framed on the periphery according to the usage mode. It can also be used by incorporating it into the upper surface of a tile.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 11 in FIGS. 1 and 2 denotes a thin-film solar cell module. The module 11 is provided on a module main body 12 without overlapping in the thickness direction of the main body 12 as described later. And a terminal box 13 laid sideways.

The module body 12 includes a transparent substrate 21, a solar cell 22, a back electrode layer 23, a filler 24, an output line 25, a first sealing cover 26, and a second sealing cover as another sealing cover. 27 are formed.

As the rectangular transparent substrate 21, a transparent glass substrate or a synthetic resin substrate is used. A plurality (only one is shown) of solar cells 22 are stacked on a surface (back surface) opposite to the light incident surface of the substrate 21 via a transparent electrode layer (not shown). These solar cells 22 are transparent substrate 2
For example, amorphous silicon is used for the photovoltaic elements provided in parallel with one side and constituting each cell 22. A back electrode layer 23 is stacked on the solar cells 22, and the solar cells 22 are electrically connected in series and / or parallel by the electrode layers 23. Output take-out lines 25 are respectively connected to the electrical ends of the solar battery cells 22 connected in this manner. The pair of output lines 25 is made of a metal foil having a width of about 6 mm.

The solar cell 22, the back electrode layer 23, and the base of the output lead 25 on the back electrode layer 23 side are hermetically and water-tightly sealed by a filler 24. Filler 24
EVA (ethylene-vinyl acetate copolymer), PVB (polyvinyl butyral), silicone resin and the like are used. The filler 24 can be formed by a lamination process for performing a hot melt.

A first sealing cover 26 made of a weather-resistant film is attached to the back surface of the filler 24. This cover 26
Is provided with a through hole 26a, through which an output extraction line 25 is drawn. As the first sealing cover 26, an insulating film having excellent moisture resistance and water resistance such as a fluorine-based film or a PET film is used alone or as shown in FIG. 1 on both surfaces of a metal foil 26c such as aluminum. A three-layer film obtained by laminating the insulating films 26b is used. The use of the first sealing cover 26 having the three-layer structure is preferable in that the metal foil 26c can further improve the moisture resistance and the water resistance.

The output lead wires 25 on the positive electrode side and the negative electrode side, which are drawn out substantially in parallel with each other through the wire holes 26a, are attached to the second sealing cover 27 via the filler 28.
Appropriate electrical insulation is provided between the output line 25 and the back electrode layer 23 by a sealing cover 26 or the like. As the filler 28, the same type as the filler 24 is used, and as the second sealing cover 27, the same type as the first sealing cover 26 is used. The filling material 28
output lead-out lines 25 drawn substantially parallel to each other through
And the second sealing cover 2
7 is adhered to a part of the back surface of the first sealing cover 27.

By the laminating process, the filler 2
Part of at least one of 4 and 28 fills the through hole 26a, whereby the through portion 29 (the inner portion of the through hole 26a) of the first sealing cover 26 of the output wire 25 is It is configured so as to be covered with an intermediate portion between the second sealing cover 27 and the filler 28 so as not to contact the outside air. The lamination process is performed by first applying a predetermined pressure and temperature to the laminated body using a laminator after a predetermined lamination state is obtained. The predetermined lamination state is such that, after the solar cell 22 and the back electrode layer 23 are covered with the filler 24, the filler 24 is covered with the first sealing cover 26, After the both output lead wires 25 that have been subjected to the electrical insulation treatment are passed through the through-hole 26a and bent along the back surface of the first sealing cover 26, the two output lead wires 25 are covered and the second sealing is performed. Filler 2 on part of cover 26
8, and a second sealing cover 27 having substantially the same size as the filler 28 is further covered by the filler 28. By this laminating process, the fillers 24 and 28 are heated and melted, solidified at room temperature after cooling, and simultaneously exhibit an adhesive function.

A part of the second sealing cover 27 forms an extension 27a that intersects one side of the module body 12.
The extension portion 27a extends outside the inner region from the peripheral surface of the module main body 12 so as to extend along the surface direction of the module main body 12. The first sealing cover 26 also corresponds to the extension 27 a and the extension 2 intersects one side of the module body 12.
6d.

The extension portions 26d and 27a are substantially parallel to each other, and are provided so as to sandwich an output extraction line 25 filled with a filler 28 therebetween. The filler 28 extends in the extending direction of the protrusions 26d and 27a.
Penetrates. Therefore, the output lead-out line 25 is routed so as to protrude outside the inside region after penetrating the first sealing cover 26 in the back surface direction in the inside region of the module main body 12, and Except for this, they are embedded in the fillers 24 and 28.

The terminal box 13 includes a box body 31 and a lid 32 fixed to the box body 31 by screwing or bonding, and is formed to house a pair of terminal fittings 33 therein. The box body 31 and the lid 32 are made of synthetic resin. Box body 31
On the metal fitting mounting base 31a integrated with the terminal fittings 33, both terminal fittings 33
Has been fixed. On one side wall 31b of the box body 31, there is provided a cutout 35 through which the two extending portions 26d and 27a having a laminated structure pass. Further, the box body 31 is integrally provided with a support portion 36 which is located on the one side wall 31b side and is formed of one or more convex portions, ribs or the like. Support part 3
6 and the bottom of the notch 35 are at the same height.
Further, an adhesive portion 37 is integrally provided on the lid 32 in correspondence with the support portion 36.

The terminal box 13 has one side wall 31b adhered to a part of the peripheral surface 12a of the module body 12 with an adhesive 38, and the adhesive part 37 is attached to the extension part 27a with the adhesive 3
By being bonded by 9, it is located outside the inner region and is laterally attached to the periphery of the module body 12. In this mounting state, the two extending portions 26 d and 27 a forming a laminated structure so as to sandwich the routing portion of the output lead wire 25 are sandwiched between the support portion 36 and the adhesive portion 37. This clamping is performed as the lid 32 is attached to the box body 31 bonded to the peripheral surface 12a of the module body 12. In particular, when the lid 32 is screwed, it is preferable because a large clamping force can be obtained.

In addition to the above-described structure, the extension portion 26d and the support portion 36 are bonded to each other with an adhesive provided therebetween, so that the bonding area of the terminal box 13 is increased and the module main body is bonded. This is preferable because the mounting strength of the terminal box 13 with respect to the terminal box 12 can be further improved.

The leading ends of the output lead wires 25 on the positive electrode side and the negative electrode side passing between the two extension portions 26d and 27a are connected to the box body 31.
And is electrically connected to one end of the corresponding positive or negative terminal fitting 33. This connection may be performed using solder 40 as shown in FIG. 1, but may be performed using a conductive adhesive instead. Also, the terminal portions of the positive and negative external wire cables 41 having a diameter of 6.4 mm, respectively, penetrate through both walls of the box body 31 which are connected to the one side wall 31b and are substantially parallel to each other. The 41 conductive wires 41a are electrically connected to the other ends of the corresponding positive or negative terminal fittings 33. This connection is performed by ultrasonic welding, soldering, mechanical caulking, screwing, or a combination of these connecting elements.

In this way, the two external electric cables 4 electrically connected to the output line 25 via the terminal fitting 33
At least the terminal-side portion 1 is located outside the inner region, and is inserted into the terminal box 13 not along the thickness direction of the module body 12 but along the surface direction.

Reference numeral 43 in FIG. 1 denotes an electrically insulating sealing resin filled over substantially the entire area of the terminal box 13.
The resin 43 seals the connection between the output lead wire 25 and the external electric cable 41 to the terminal fitting 33 in an airtight manner. Silicone resin or the like can be used for the sealing resin 43. The sealing resin 43 is not essential and can be omitted.

The solar cell module 11 having the above configuration
Can be removed from the region inside the peripheral surface 12a of the module main body 12 without arranging the entire terminal box 13 in the thickness direction of the module main body 12,
2, the maximum thickness of the solar cell module 11 can be reduced. By the way, when the thickness of the module main body 12 is 5 mm and the thickness of the terminal box 13 is 10 mm, the maximum thickness of the solar cell module 11 is defined by the terminal box 13, and the thickness of the box 13 can be 10 mm.

Although the terminal box 13 is laid sideways with respect to the module main body 12 as described above, the output lead-out line 25 guided from the module main body 12 into the terminal box 13 is sealed in the inner area. It is routed through the cover 26 in the direction of the terminal box 13, and its path is long and bent. Moreover, the output lead wire 25 is covered with another sealing cover 27 in a state of being embedded in the filler 28, and the penetrating portion 29 of the output lead wire 25 with respect to the sealing cover 26 is hermetically sealed. I have. Therefore, as compared with the conventional configuration in which the output lead wire 25 is protruded from the peripheral surface 12a within the thickness range of the module main body 12 without being routed and led into the terminal box,
Since the infiltration path of the moisture to the photovoltaic cells 22 along the output line 25 is bent long, it is easy to prevent moisture from entering the module body 12 for a long time. In particular, the output lead wire 25 is connected to both sealing covers 26, 27.
Is airtightly sealed between the extending portions 26d and 27a, so that the infiltration path can be secured longer. Therefore, corrosion of the solar cell 22 due to infiltration of moisture is prevented over a long period of use, so that the durability is excellent and the environmental resistance performance of the solar cell module 11 can be improved.

Further, the peripheral surface 12a of the module body 12
Of the terminal box 13 laid sideways on a part of the side wall 31b
Not only is bonded to the peripheral surface 12a with an adhesive 38, but also the bonding portion 37 of the lid 32 is
The adhesive cover 39 is attached to the extension 27a of the sealing cover 27 that has entered inside by bonding with an adhesive 39. Since the bonding area of the terminal box 13 is large as described above, the mounting strength of the terminal box 13 with respect to the module main body 12 can be increased, and the terminal box 13 can be laid sideways on the module main body 12 to sufficiently withstand a load such as a strong wind. Moreover, the sealing cover 27
Is used as a part for increasing the bonding area, so that no special parts are required and the configuration is simple.

FIGS. 3 and 4 show a second embodiment of the present invention. Since this embodiment is basically the same as the first embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. I will explain only.

The second embodiment is different from the first embodiment in that the terminal box 13 is provided with a configuration (extraction wire cover) corresponding to the extending portions 26b and 27a described in the first embodiment, and the first embodiment. The difference is that the sealing cover 26 and the filler 28 described in the embodiment are omitted.

That is, the box body 31 of the terminal box 13 has
An extension 31c that overlaps the back surface of the sealing cover 26 is formed integrally. The extension part 31c has a length sufficient to cover the penetrating part 29 of the output extraction line 25. This extension 3
1c is provided with a through hole 51 facing the penetrating portion 29 (here, a part of the filler 24 is filled).
The output lead-out line 25 can be routed into the terminal box 13 through. The lid 32 of the terminal box 13 is
The size is formed so that the opening of the box main body 31 can be closed including c.

In the structure of the terminal box 13, the extension 3
Portions other than 1c and the corresponding extension 32a of the lid 32 constitute a box main portion 13A of the terminal box 13. The box main portion 13A is adhered to a part of the peripheral surface 12a of the module main body 12 with an adhesive 38, is laterally attached to the module main body 12, has a terminal fitting 33 built therein, and has two external electric wires. Cable 41 is inserted. The terminal fittings 33 are formed by insert molding to form ribs 5 described later.
2 and is mounted through.

Extension portions 31c, 31 excluding the box main portion 13A
The take-out line cover portion 13B made of a is bonded to the back surface of the sealing cover 26 with an adhesive 39. Further, an output extraction line 25 is passed between the extension portions 31c and 32a. The take-out line cover portion 13B only needs to have a thickness enough to allow the output take-out line 25 to pass therethrough as described above, so that the cover portion 13B is thinner than the box main portion 13A and the module main body 12. Is formed.

The sealing resin 43 filled in the terminal box 13 is not limited to the box main part 13A, but also to the lead wire cover part 1.
3B, and the sealing resin 43
1 to hermetically seal the through portion 29. Note that the sealing resin 43 can be omitted.
Also, 52 in FIG.
The rib extending over 3B is shown. This configuration is such that the sealing resin 4
Filling 3 contributes to reducing the filling amount required for sealing the output extraction line 25.

Also in the configuration of the second embodiment, since the terminal box 13 is laid sideways on the module body 12,
The solar cell module 11 can be made thin. Note that the lead wire cover portion 13B overlaps in the thickness direction of the module body 12, but this cover portion 13B
The thickness of the lead wire cover portion 13B and the module body 12 does not become larger than the thickness of the terminal box 13 because it can be formed thin enough to pass through.
Therefore, as described above, the thin solar cell module 1
1 can be configured. Further, the lead-out wire cover 13B can be formed to be long corresponding to the length of the output lead-out wire 25. Accordingly, a large bonding area of the extraction wire cover 13B to the sealing cover 26 is secured, and the total bonding area is larger than that of the first embodiment.
2 is superior in that the mounting strength of the terminal box 13 to the terminal box 2 can be further improved. The configuration, operation, and effect other than the above-described points are the same as those of the first embodiment.

FIGS. 5 and 6 show a third embodiment of the present invention, FIG. 7 shows a fourth embodiment of the present invention, and FIG. 8 shows a fifth embodiment of the present invention. Since these embodiments are basically the same as the second embodiment, the same components as those of the second embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, configurations different from the second embodiment will be described. Will be described only. In these embodiments, a terminal box mounting portion is provided on the module main body 12 in order to lay the box main portion 13A sideways on the module main body 12.

That is, in the third embodiment, the box mounting plate 61 used as the terminal box mounting portion is mounted on the module main body 12 by protruding outward from the peripheral surface 12a. As the box mounting plate 61, a hard plate such as a metal, a plastic, or a ceramic is used. In particular, it is preferable to use an electrically insulating plastic or a ceramic. The box mounting plate 61 has a part 61 c inserted into and adhered to the filler 24 so as to be sandwiched between the transparent substrate 21 and the sealing cover 26. This bonding is preferably performed in the lamination process. Alternatively, the box mounting plate 61 may be provided by bonding to the transparent substrate 21 or the sealing cover 27 using an adhesive.

The projecting portion of the box mounting plate 61 exposed from the peripheral surface 12a is preferably a first plate portion 61a bent along the peripheral surface 12a and a second plate bent substantially at right angles from the portion 61a. And a portion 61b. The second plate portion 61b as the box fixing portion is not limited by the thickness of the module body 12, and can be provided in an arbitrary size having an area larger than this thickness.
It is more preferable to bond the first plate portion 61a to the peripheral surface 12a. As shown in FIG. 6A, the second plate portion 61b
Is provided with a plurality of fixing holes 62. The box main portion 13A of the terminal box 13 is fixed to the second plate portion 61b with screws 63. Instead of the screwing, the box main portion 13A may be bonded to at least the second plate portion 61b of the first and second plate portions 61a and 61b using an adhesive.

Also, instead of the box mounting plate 61 of FIG. 6A, a box mounting plate (terminal box mounting portion) 6 shown in FIG.
1 can also be used. The box mounting plate 61 shown in FIG. 6B has a claw receiving portion 64 made of, for example, a protrusion on each of two sides parallel to each other of the second plate portion 61b instead of the fixing holes.
Is provided. Box mounting plate 61 shown in FIG.
When a plurality of claws 65 that can be elastically deformed are protruded from the box main portion 13A, and these claws 65 are hooked on the claw receiving portions 64 at the corresponding positions, the second plate portion 61b is formed. What is necessary is just to fix the box main part 13A.

The terminal box 13 has a box main portion 13A.
Is fixed to the box mounting plate 61 as described above, and the take-out wire cover portion 13B is adhered to the back surface of the sealing cover 26 with an adhesive 39, so that the take-out wire cover portion 13B is laterally attached to the module body 12.

Therefore, in the configuration of the third embodiment, as in the second embodiment, the solar cell module 11
Can be made thin, and the mounting area of the terminal box 13 can be increased, so that the mounting strength of the terminal box 13 to the module body 12 can be improved. In addition, the routing of the output lead-out line 25 penetrating the sealing cover 26 has effects such as improvement in moisture-proof property and excellent durability.

In addition, since the terminal box 13 can be covered with the box mounting plate 61 on the light incident surface side, the terminal box 13 has excellent protection performance. Moreover, since the box mounting plate 61 is bent, the thickness of the solar cell module 11 is easily reduced.
Further, since the box main portion 13A of the terminal box 13 can be mechanically fixed to the box mounting plate 61 by screwing or hooking of the claws 65 as described above, the terminal box 13 is moved from a predetermined position until the adhesive 39 is cured. Since the curing time for waiting for the hardening of the adhesive 39 can be omitted without shifting, the manufacturing time can be reduced, and even if the bonding performance of the hardened adhesive 39 is deteriorated, the module main body can be moved by the mechanical fixing portion. The terminal box 13 can be kept in a proper horizontal state relative to the terminal box 12.

In the fourth embodiment shown in FIG. 7, a part of the sealing cover 26 extends outward from the inner region of the peripheral surface 12a of the module body 12, and this extended portion is connected to the terminal box mounting portion 71. Used as This terminal box mounting portion 71
Is adhered to the peripheral surface 12a using an adhesive 72, and a portion ahead of the base is bent substantially at right angles to the base. Then, two surfaces of the box main portion 13A of the terminal box 13 are bonded to the terminal box mounting portion 71 using an adhesive 73. Also, the lead wire cover 1 of the terminal box 13
3B is adhered to the back surface of the sealing cover 26 by an adhesive 39.

Therefore, also in the configuration of the fourth embodiment, the solar cell module 11 is similar to the second embodiment.
Can be made thinner, and the bonding area of the terminal box 13 can be increased, so that the mounting strength of the terminal box 13 to the module body 12 can be improved. In addition, the routing of the output lead-out line 25 penetrating the sealing cover 26 has effects such as improvement in moisture-proof property and excellent durability. In addition, since the terminal box 13 can be covered with the terminal box attaching portion 71 on the light incident surface side, the terminal box 13 has excellent protection performance.

In the fifth embodiment shown in FIG. 8, a box mounting plate 81 used as a terminal box mounting portion is mounted on the module main body 12 by protruding outward from the peripheral surface 12a. As the box mounting plate 81, a hard flat plate such as a metal, a plastic, or a ceramic is used. In particular, it is preferable to use an electrically insulating plastic or a ceramic.
The box mounting plate 81 has a part 81c which is
And the sealing cover 26 are inserted into and adhered to the filler 24 so as to be sandwiched therebetween. This bonding is preferably performed in the lamination process. Alternatively, the box mounting plate 81 may be provided by bonding to the transparent substrate 21 or the sealing cover 27 using an adhesive.

A plurality of screw holes 82 are formed in the projecting portion of the box mounting plate 81 exposed from the peripheral surface 12a. The projecting portion includes a box main portion 13A of the terminal box 13.
The box main portion 13A hooked on the box mounting plate 81 by this fitting is
It is fixed by a screw 83 screwed into the screw hole 82.

Therefore, in the configuration of the fifth embodiment, the solar cell module 11 is similar to the second embodiment.
Can be made thin, and the mounting area of the terminal box 13 can be increased, so that the mounting strength of the terminal box 13 to the module body 12 can be improved. In addition, the routing of the output lead-out line 25 penetrating the sealing cover 26 has effects such as improvement in moisture-proof property and excellent durability. In addition, since the terminal box 13 can be covered with the box mounting plate 81 on the light incident surface side, the terminal box 13 has excellent protection performance.

The lead wire cover 13B in each of the second to fifth embodiments has a sealing resin 43 inside.
When filling, the portion which contacts the back surface of the sealing cover 26 in the extension portion 31 of the box main portion 31 may be removed and opened, or the entire extension portion 31c may be omitted. Instead of this, it is also possible to adopt a configuration in which a peripheral wall that is continuous with the leading edge and both side edges of the extension 32a of the lid and that is in contact with the back surface of the sealing cover 26 is provided.

[0059]

According to the first to third aspects of the present invention implemented in the above-described manner, the terminal box accommodates the terminal fitting to which the output lead wire and the terminal portion of the external electric cable are connected. Since the main part of the box is arranged at least outside the peripheral part of the module main body and laterally mounted on the module main body, the entire module can be reduced in thickness, and a large bonding area or mounting area of the terminal box with respect to the module main body is secured. The mounting strength of the terminal box can be improved, and the moisture intrusion path leading to the solar cell is bent for a long time, so that moisture infiltration into the module body can be prevented for a long time, resulting in excellent durability. A solar cell module can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a partial configuration of a solar cell module according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a part of FIG. 1;

FIG. 3 is a sectional view showing a partial configuration of a solar cell module according to a second embodiment of the present invention.

FIG. 4 is an exploded perspective view showing a part of FIG. 3;

FIG. 5 is a sectional view showing a partial configuration of a solar cell module according to a third embodiment of the present invention.

FIG. 6A is a perspective view illustrating a box mounting plate provided in the solar cell module of FIG. 5; FIG. 6B is a perspective view showing another example of the box mounting plate that can be used for the solar cell module in FIG. 5.

FIG. 7 is a sectional view showing a partial configuration of a solar cell module according to a fourth embodiment of the present invention.

FIG. 8 is a sectional view showing a partial configuration of a solar cell module according to a fifth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Solar cell module 12 ... Module main body 12a ... Peripheral surface of module main body 13 ... Terminal box 21 ... Transparent substrate 22 ... Solar cell 24 ... Filler 25 ... Output lead-out line 26 ... Sealing cover 26d ... Extension of sealing cover Protruding part 27 ... Other sealing cover 27a ... Extending part of other sealing cover 28 ... Filling material 29 ... Penetrating part 31b ... One side wall of terminal box 33 ... Terminal fitting 37 ... Adhesive part 38,39 ... Adhesive 41 ... External wire cable 13A ... Box main part of terminal box 13B ... Extraction wire cover part of terminal box 61,81 ... Box mounting plate (terminal box mounting part) 71 ... Terminal box mounting part

Claims (3)

[Claims] 1. A solar cell laminated on one surface of a transparent substrate is sealed with a filler, and the filler is covered with a sealing cover to be electrically connected to the solar cell. A module main body in which the output output line is provided through the sealing cover, and the output output line is covered with another sealing cover so that the through portion of the output extraction line does not come into contact with the outside air, A solar cell module comprising: a terminal box to which the output extraction line and a terminal portion of the external electric cable are respectively connected, and a terminal box attached to the module main body, wherein at least the A part of another sealing cover is extended outward from the peripheral surface of the module main body, and the terminal box is adhered to the extending portion and the peripheral surface, respectively, and the terminal box is laterally mounted on the module main body. Octopus Solar cell module according to claim. 2. A solar battery cell laminated on one surface of a transparent substrate is sealed with a filler, and the filler is attached with a sealing cover to be electrically connected to the solar battery cell. A terminal attached to the module main body having a module main body provided with an output extraction line penetrating the sealing cover, and terminal fittings to which terminal portions of the output extraction line and the external electric cable are respectively connected. In a solar cell module comprising a box, the terminal box accommodates the terminal fittings and has a box main part to which the external electric cable is attached, and is formed to be thinner than the box main part, protruding from the box main part. An output line cover portion that covers an output extraction line reaching the box main portion,
A solar cell module, wherein the box main part is adhered to a peripheral surface of the module main body, and the lead wire cover part is adhered to the sealing cover, and the terminal box is laid sideways on the module main body. 3. A solar battery cell laminated on one surface of a transparent substrate is sealed with a filler, and the filler is covered with a sealing cover to be electrically connected to the solar battery cell. A terminal attached to the module main body having a module main body provided with an output extraction line penetrating the sealing cover, and terminal fittings to which terminal portions of the output extraction line and the external electric cable are respectively connected. A solar cell module comprising a box, a terminal box mounting portion extending outward from a peripheral surface of the module main body, and the terminal box accommodates the terminal fitting and the external wire cable is mounted. A box main part, and a take-out line cover part projecting from the box main part and formed so as to be thinner than the box main part and covering an output take-out line leading to the box main part. And bonding the extraction line cover portion is fixed to the child box attachment portion to said sealing cover, a solar cell module, characterized in that the terminal box and alongside the module body.