JPH09186471A - Solar cell module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the hanging of an electric wire and to improve the working property in following processing and execution of installation by providing a fixing member in a terminal takeoff case, and fixing the electric wire for electric output by this fixing member in a solar cell module having the terminal takeoff case and the electric wire for the electric output. SOLUTION: For a solar cell module 1, a base-stage member 7 of a terminal takeoff case 6 is bonded and fixed to a terminal takeoff part, wherein a hole for taking off the terminal is provided in metal reinforcing plate 3, by silicon adhesive agent 8. From the base-stage member 7, an electric wire 10 for electric output is outputted through a bushing 9. A cap member 11 is engaged with the base-stage member 7. An engaging member 12, which can engage the electric wire 10, is provided at the cap member 11 when the cap member 11 is molded as a unitary body. The electric wire 10 is fixed to the solar cell modules 1 without hanging by engaging the electric wire 10 by using the engaging member 12. Therefore the working property in following processing and the execution of installation can be improved.

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, and more particularly to a solar cell module provided so that its electric output wire does not get in the way during post-processing and installation of the solar cell module.

[0002]

2. Description of the Related Art Conventionally, solar cells have been widely used as a clean and non-depleting energy source. In addition, a wide variety of research and development have been conducted on the solar cell itself, and solar cell modules that are well suited for installation on the ground, on the roof, and the like are being actively developed.

[0003] In particular, in terms of installation on a roof,
The development of a roof material-integrated solar cell module that can also serve as a roof material is also useful from the viewpoint of cost reduction for the spread of solar cells in the future.

As such a roof material-integrated solar cell module, a solar cell module suitable for an existing roof construction method as described below is under study.
It is, for example, as shown in FIGS. 4 and 5.

FIG. 4 is a cross-sectional view showing a conventional solar cell module, and FIG. 5 is a perspective view of the solar cell module of FIG. 4 seen from the back side. This solar cell module has a metallic reinforcing plate 13 on the back surface side, and the solar cell element 1
4 is sealed with a surface film 15 and a translucent resin 16. In such a solar cell module, both long-side end portions 17 are bent upward by 90 degrees so that the solar cell module can be adapted to the ordinary roof tile roofing method.

The metal reinforcing plate 13 has a terminal lead-out box 18
The base member 22 of the above is adhered and fixed by the silicone adhesive 19, and the electric output electric wire 20 is attached to the bushing 2
1 and the lid member 23 is attached. At this time, the terminal take-out box 18 is manufactured so as to have waterproofness at the fitting portion of the base member 22 and the lid member 23, and by using the bushing 21, waterproofing is also provided at the take-out portion of the electric wire. It is kept.

It is desirable for the roof material-integrated solar cell module that the work of electric wiring can be easily performed at the time of installation and construction. Therefore, the one-touch type connector 40 is provided at the tip of the electric wire 20 of the solar cell module described above, and the cable length is set to a length (for example, 30 cm) that facilitates electrical wiring.

As described above, by providing the electric wire 20 and the connector 40 for a desired electric output from the beginning in the solar cell module, electric wiring during installation work becomes very easy.

However, in the solar cell module as described above, an electric output wire hangs down on the back side, which is an obstacle in handling during post-processing of the solar cell module and during transportation during installation. May be.

A detailed description will be given below. First, the handling problems during post-processing are as follows.

The above-mentioned solar cell module is characterized in that the long side end portions 17 are bent upward by 90 degrees, but the electric wire hangs down on the back surface side during the bending process, that is, during the post processing. Process becomes difficult.

The bending process is performed by a device called a roller forming machine, which gradually bends the solar cell module as a work piece while continuously feeding it.

As shown in the sectional view of FIG. 6, the method of processing by the roller forming machine is to sandwich the solar cell module 24 between the upper and lower conveying rollers 26 and convey it. At this time, the shape of the processing roller 25 that comes into contact with the bent portion is formed so that the solar cell module is finally bent into the shape shown in FIG. The solar cell module is gradually bent by arranging the processing rollers 25 with gradually changing shapes in a plurality of stations.

However, at this time, as can be seen from FIG. 6, if the electric wire 20 is still hung,
There is also the possibility of being entangled in the roller forming machine, and processing cannot be carried out. Then, the adhesive tape 28 is used to
0 is fixed to the metal reinforcing plate. Here, as the manufacturing process sequence, why the bending process is performed after attaching the terminal take-out box and the electric wire, and vice versa, the work of attaching the terminal take-out box and the electric wire after performing the bending process is performed. Whether or not to do this is briefly described below.

As described above, when an attempt is made to adhere and fix the terminal take-out box to a solar cell module that has already been bent, the module is not stable and is difficult to perform. Therefore, a fixture for raising the module by more than the bending height and holding it horizontally must be prepared, and the module must be placed on the fixture for the work, which is complicated.

Further, in order to dry the sealant, it is necessary to leave the module at room temperature for 24 hours while keeping the terminal lead-out box side upward and keeping it horizontal. Therefore, as described above, the module already bent is placed on a dedicated stand for holding it horizontally without bending and drying the sealant, but the module is already bent. Therefore, the volume occupied by one module increases accordingly. Due to the drying of the sealant, the occupied space for storing the module is much larger than the unfolded one. Therefore, it is suitable to attach the terminal take-out box before bending.

Next, even when the solar cell module is being installed and transported, if the electric wire hangs down from the module, the cable may be inadvertently hooked, which is extremely dangerous. Therefore, the electric wire is fixed with tape to prevent it from hanging down.

[0018]

However, as described above, when the electric wire is fixed by the tape, the tape must be peeled off and discarded immediately before the installation,
It is useless.

Further, since the installation operator carries and installs a large number of solar cell modules, it is difficult to deal with the peeled tape.

Further, the worker wears gloves for safety, which makes it difficult to remove the tape.
The peeled tape still has adhesive strength, and it sticks to gloves, which is a major obstacle to smooth installation work.

As described above, there are many problems in fixing the electric wire by using the tape, and therefore a method using a commercially available clamp has been considered. For example, as shown in FIG. 11, the clamp 44 is attached to the metal reinforcing plate by the double-sided tape, and the electric wire 20 is fixed so as not to hang down. With this method, it is possible to avoid problems when using a tape.

However, the clamp 44 is finally unnecessary. Considering this, the double-sided tape, the clamp, and the bonding work process thereof are very wasteful in terms of cost.
Therefore, at present, as described above, the method of fixing the electric wire with the tape is adopted.

In addition to the above problem, there is also a problem that it is difficult to attach the connector due to winding habit when the electric wire is fixed to the module. The working environment becomes extremely low, such as when performing installation work in winter in cold regions. When the temperature is low, the flexibility of the covering material of the electric wire is lost, which is a very difficult work when mounting the connector against the winding habit. Therefore, the shape to fix the electric wire to the module,
In other words, if it is fixed without taking an appropriate shape in consideration of the winding peculiar shape, a very difficult work is required.

A brief description will be given with reference to FIG. FIG.
[Fig. 4] is a view of a state in which a solar cell module is installed, viewed from the back side. As shown in the figure, the solar cell module 2
4a is installed on the ridge side, and the solar cell module 24b is installed on the eaves side, and is installed by providing an overlapping portion 43 for rain warding. At this time, when the electric wire and the connector are fixed to the back surface of the module with the tape 28, the electric wire and the connector 40a are always deformed while resisting the winding tendency as shown by a broken line showing a part of the process of deforming the electric wire. , 40b must be attached, which is a very laborious and difficult task.

There are some difficulties in handling an inflexible electric wire with winding habit. However, in addition to that, it is more difficult for the following reasons.

The positive and negative polarities of the electric wire and the connector are symmetric with respect to the line aa '. It remains axisymmetric when both wires and connectors are deformed, so the connectors must rotate 270 ° or more from the fixed state before they are in the direction to engage each other. become. When the electric wire loses flexibility, it is a very forceful work just before attaching both connectors after rotating it by 270 ° or more.

An object of the present invention is to improve the workability of the solar cell module during post-processing and installation work in view of the problems of the prior art.

[0028]

To achieve this object, according to the present invention, in a solar cell module having a terminal lead-out box and an electric output wire, the terminal lead-out box is a fixing member for fixing the electric output wire. It is characterized by having.

The fixing member is characterized by directly fixing the electric output wire.

Further, the present invention is characterized in that a connector is provided at the end of the electric output electric wire, and the fixing member fixes the connector.

Further, the fixing member is characterized in that the electric output electric wire and the connector are fixed only in one posture and shape.

Furthermore, the connector is provided with a directional protrusion, and the fixing member is characterized by having a groove that matches the protrusion.

[0033]

According to this structure, it is possible to prevent the electric wire from hanging down, and there is no problem that the electric wire is an obstacle in handling during post-processing of the solar cell module and transportation during installation and the like.

Further, since the connector is attached in only one form, it is possible to fix the electric wire in a desired shape regardless of who works, and even when the electric wire loses its flexibility at a low temperature or the like. , The work of attaching the connector becomes easy.

This only form is considerably advantageous when the wire and the connector respectively connected to the positive and negative poles have point symmetry. As described in Examples below,
Due to the point symmetry, the electric wires are deformed so as to face each other at the center point, so the work is considerably reduced compared to the conventional case.

Therefore, when fixing the electric wire and the connector to the module, it is necessary to fix the electric wire and the connector in such a shape.

[0037]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of each component will be described below.

(Solar Cell Module) The form of the solar cell module to which the present invention can be applied is not particularly limited, but a metallic reinforcing plate is provided on the back surface side of the module, and the existing roof is installed by bending. It is very well suited for a roof material-integrated solar cell module formed so as to conform to the construction method.

However, even for other modules, for example, a ground-installed module having an aluminum frame material on the peripheral portion, the module can be easily handled by adopting a structure in which the electric wire does not hang down.

(Solar Cell Element) Although the type of the solar cell element of the solar cell module of the present invention is not particularly limited, it is preferably a bendable solar cell, and particularly preferably formed on a stainless substrate. It is an amorphous silicon solar cell.

By using a bendable solar cell element, when bending is performed by a roller forming machine,
Even if a force is applied to the solar cell module and the module is bent, the solar cell element is not broken.

(Translucent Resin Film) When a translucent resin film is used on the surface of the light receiving surface of the solar cell module of the present invention, it is preferable that it has weather resistance, for example, a fluororesin film is suitable. There is.

Further, it is preferable that the film has an elongation percentage of 250% or more so that the film is not broken or cracked when it is stretched by bending. If it is less than 250%, cracks may occur when the solar cell is bent.

(Translucent Resin) Examples of the translucent resin of the solar cell module of the present invention include, but are not limited to, ethylene-vinyl acetate copolymer (EVA), polyvinyl butyrol, and silicone resin. It is not something that can be done.

(Metal Reinforcement Plate) As the metal reinforcement plate,
It is preferable that the material has excellent weather resistance and bending workability and has a long-term reliability as a normal metal roof material. Examples thereof include galvanized steel sheets, steel sheets having a weather resistant substance such as fluororesin or vinyl chloride thereon, and stainless steel sheets.

(Terminal take-out box) The terminal take-out box of the solar cell module of the present invention is provided with a member capable of locking the electric output wire or the connector, except that the terminal take-out portion is insulated, waterproof and Anything that can fulfill the function of protection in the mechanical structure,
It is not otherwise limited.

Regarding the material, for example, polycarbonate is very suitable because it is possible to obtain desired mechanical strength and heat resistance, but the material is not limited to this. The method of attaching the terminal take-out box to the module is not particularly limited, and there are methods of using various adhesives such as epoxy resin, or methods of mechanically attaching, but as described above, the silicon adhesive is used. It is very suitable because of its excellent adhesive strength and heat resistance.

(Electric Output Electric Wire) The electric output electric wire of the solar cell module of the present invention is not particularly limited as long as it is a legally compliant product that conforms to the electric output of the solar cell module. For example, a CV cable, a cabtire cable, etc. are mentioned.

The present invention will be described below with reference to examples.
The present invention is not limited to these examples.

[0050]

【Example】

[Embodiment 1] FIG. 1, FIG. 2 and FIG. 3 are a perspective view, a perspective view and a partial sectional view, respectively, of a solar cell module according to a first embodiment of the present invention as seen from the light receiving surface side. is there.

This solar cell module is a roof material-integrated solar cell module which is suitable for roof tile roofing which is a conventional roof construction method.

As shown in FIG. 3, the solar cell module 1 has a metal reinforcing plate 3 on the back side and a fluororesin film 4 on the light receiving side surface, and an amorphous silicon film is formed on a stainless steel substrate. The manufactured solar cell element 2 is manufactured by resin-sealing with a translucent resin 5.

With respect to this solar cell module, the terminal take-out box 6 has a base member 7 and a silicon adhesive 8 at a terminal take-out portion in which a hole for taking out a terminal is provided in a metal reinforcing plate 3.
It is fixed by adhesion. From the base member 7, an electric output wire 10 is output with a bushing 9 interposed. The lid member 11 is locked to the base member 7. The fitting portion between the base member 7 and the lid member 11 is made to have a structure that maintains waterproofness, and is also waterproof at the wire lead-out portion by the bushing 9.

A locking member 12 that can lock the electric wire 10 is integrally provided on the lid member 11 when the lid member 11 is molded. As shown in FIGS. 2 and 3, by locking the electric wire 10 using the locking member 12, the electric wire is fixed to the module without hanging.

In this way, the locking member 12 is attached to the lid member 11
Since the locking member 12 is integrally provided at the time of molding, the work of manufacturing and fixing the locking member 12 by a separate member can be omitted. This is very suitable for simplifying work and reducing costs.

After fixing the base member 7 with the silicone adhesive 8 and leaving it for 24 hours to cure the silicone adhesive 8, the roller forming machine described above is used to form the shape shown in FIGS. The solar cell module is completed by bending it. At this time, as described above, since the electric wire is fixed to the module without hanging down, the processing by the roller forming machine can be performed without any problem.

Further, even during transportation during installation and construction, there is no concern of catching the electric wire, and the work can be carried out smoothly.

[Embodiment 2] The solar cell module of this embodiment is characterized in that one terminal take-out box is provided with two electric wire locking members. The points not specifically mentioned here are the same as in the first embodiment.

FIG. 7 is a perspective view of this solar cell module as seen from the back surface side, and FIG. 8 is a partial sectional view thereof.

In this embodiment, an amorphous silicon solar cell 29 having a stainless steel substrate is used as a solar cell element.
As a surface film, a non-stretched type fluororesin film 30 (“Tefzel” manufactured by DuPont) with a thickness of 50 μm, and EVA 31 (provided with a thickness of 900 μm on each of the front and back sides of the solar cell element) as a translucent resin. A solar cell module was manufactured using a galvanized steel plate 32 having a thickness of 0.4 mm as a metal reinforcing plate.

Next, as shown in FIG. 7, the terminal lead-out boxes 33 were provided on the positive and negative electrodes at both ends on the back surface side of the solar cell module. The terminal lead-out box 33 is composed of a base member 34 and a lid member 35, and both members are made of polycarbonate and are manufactured by resin molding using a mold. At this time, when the lid member 35 is molded, the wire locking member 36 is integrally molded as shown in FIG. In addition, the adhesion of the base member 34 and the metal reinforcing plate 32 is
A silicone adhesive 38 (739, manufactured by Dow Corning Co., Ltd.) was used and left for 24 hours to cure.

A CV cable 37 was used as an electric output wire, and the length of the electric wire was set to 50 cm for installation work, and a connector was provided at the tip thereof. Since the length of the electric wire is 50 cm, it tends to hang down if the locking portion is at one place, but it does not hang down by locking at two positions as in this embodiment.

As a result, there is no problem at all when the roller forming machine is used for bending and during transportation during installation work, and the processing and installation work can proceed smoothly. [Embodiment 3] The solar cell module of the present embodiment is characterized in that a locking member capable of locking the connector is provided in the terminal take-out box. The points not specifically mentioned here are the same as in the second embodiment.

The present embodiment is intended to realize an appropriate wire fixing shape in consideration of the above-mentioned winding habit.
Similar to FIG. 10, FIG. 9 is a view of the solar cell module viewed from the back surface side.

In this embodiment, unlike the prior art,
The positive and negative pole electric wires 20 to be connected are fixed in a point-symmetrical shape. The broken line shows a part of the process of deforming the electric wire 20. As can be seen by comparison with the above, in this embodiment, since the connectors 40a and 40b of each other are directed toward the center point 39,
The connectors 40a and 40b need only be rotated by about 180 °, and they can be connected without applying much force, and the work load is greatly reduced.

For this reason, when the positive and negative pole connectors 40a and 40b are attached to the terminal take-out box 33, as shown in FIG.
The mounting member is manufactured so that 0a and 40b have a unique posture and shape and are fixed. That is, the connectors 40a and 40b are provided with directional projections, and the terminal take-out box 33 is provided with a mounting member having a groove portion matching the shape of the projections. Thus, no matter what worker fixes the electric wire 20 and the connectors 40a and 40b, the electric wire 20 and the connectors 40a and 40b are fixed.
9 has a desired shape and is fixed to the back surface of the solar cell module, as shown in FIG.

[0067]

As described above, according to the present invention,
Since the terminal take-out box has the fixing member for fixing the electric output wire, it is possible to prevent the electric wire from hanging down from the back surface side of the solar cell module without using a tape. Therefore, there is no problem that the electric wire is an obstacle in handling during post-processing of the solar cell module, transportation during installation, and the like.

Further, since the connector is attached in only one form, it is possible to fix the electric wire in a desired shape regardless of who works. Therefore, even when the electric wire loses flexibility due to a low temperature or the like, the work of attaching the connector becomes easy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a solar cell module according to a first embodiment of the present invention viewed from a light receiving surface side.

FIG. 2 is a perspective view of the solar cell module of FIG. 1 viewed from the back surface side.

3 is a partial cross-sectional view of the solar cell module of FIG.

FIG. 4 is a cross-sectional view showing a conventional solar cell module.

5 is a perspective view of the solar cell module of FIG. 4 viewed from the back surface side.

FIG. 6 is a sectional view showing a roller forming machine.

FIG. 7 is a perspective view of a solar cell module according to a second embodiment of the present invention viewed from the back surface side.

8 is a partial cross-sectional view of the solar cell module of FIG.

FIG. 9 is a diagram of a connector portion of a solar cell module according to a third embodiment of the present invention viewed from the back surface side.

FIG. 10 is a plan view of a connector portion of a conventional solar cell module as viewed from the back surface side.

FIG. 11 is a plan view showing a state where electric wires are fixed by a commercially available clamp.

[Explanation of symbols]

1, 24, 24a, 24b: solar cell module, 2,
14, 29: Solar cell element, 3, 13, 32: Metal reinforcing plate, 4, 15, 30: Surface film, 5, 16, 3
1: translucent resin, 6, 18, 33: terminal extraction box, 1
9: Silicone adhesive, 7, 34: Base member, 8, 38:
Silicone adhesive, 9, 21: bushing, 22: base member, 10, 20, 37: electric output electric wires 11, 23, 23
35: Lid member, 12, 36: Locking member, 17: Both ends of long side, 25: Processing roller, 26: Conveying roller, 28:
Tape, 39: center point, 40, 40a, 40b: connector, 43: overlapping portion, 44: clamp.

Claims (5)

[Claims] 1. A solar cell module comprising a terminal lead-out box and an electric output wire, wherein the terminal lead-out box has a fixing member for fixing the electric output wire. 2. The fixing member directly fixes the electric output wire.
The solar cell module as described. 3. The solar cell module according to claim 1, wherein a connector is provided at a tip of the electric output wire, and the fixing member fixes the connector. 4. The solar cell module according to claim 3, wherein the fixing member fixes the electric output electric wire and the connector only in a single posture and shape. 5. The solar cell module according to claim 4, wherein the connector includes a directional protrusion, and the fixing member includes a groove that matches the protrusion.