JPH11195797A - Solar battery module and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate possibility of a leakage occurrence in a back cover, even if a moisture-proof layer composed of a conductor, such as aluminum, etc., is provided to the back cover. SOLUTION: In a method for manufacturing a solar battery module, a solar battery module M is manufactured by successively forming a front cover 1, a second solar battery cell sealing material 2a, solar battery cells 3, a first solar battery cell sealing material 2b, and a back cover 4 in this order after holes 21 and 41 for electrodes are respectively formed through the first sealing material 2b and the back cover 4; and exposing the output electrode 31 of the cells 3 on the back cover 4 side by passing the electrodes 31 through the holes 2 and 41. Then, the components of the laminated body are jointed to each other under a prescribed pressure at a prescribed temperature. The diameters of the holes 41 for electrodes formed through the back cover 4 are made larger than those of the holes 21 formed through the first solar battery cell sealing material 2b.

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 installed on a building roof or the like, and a method for manufacturing the same.

[0002]

2. Description of the Related Art In general, a solar cell module includes a solar cell sealing material sandwiching a solar cell, a front cover disposed on a light receiving surface side of the solar cell sealing material, and a solar cell module. A back cover disposed on the back side of the cell sealing material, and an output terminal protection cover disposed on the back cover side, wherein the output electrode of the solar cell is a back cover and a solar cell on the back cover side. Each of the cell sealing materials is provided with an electrode hole, and the output electrode of the solar cell is drawn out to the back cover side through the electrode hole and connected to an output cable in the output terminal protection cover. It has a structure. Further, in recent years, a moisture-proof layer made of a conductor such as aluminum has been provided on the back cover for the purpose of moisture-proof effect. According to this method, a solar cell module having a small thickness can be manufactured as compared with a method of securing a moisture-proof effect by using glass for the back cover.

In this solar cell module, an electrode hole is previously formed in each of a first solar cell sealing material and a back cover, and a front cover, a second solar cell sealing material, a solar cell, The first solar cell sealing material,
The back cover is laminated in this order, and the output electrode of the solar cell is inserted into the electrode hole of the first solar cell sealing material and the electrode hole of the back cover so as not to contact the back cover. By exposing them to the back cover side, and then bonding these polymers at a predetermined pressure and temperature.
By the way, conventionally, the hole for the electrode of the solar cell sealing material and the hole for the electrode of the back cover have been formed to have the same diameter because of the easiness of the hole forming operation and the like.

[0004]

However, in such a conventional solar cell module, the electrode hole of the first solar cell sealing material and the electrode hole of the back cover are formed to have the same diameter. Because of the flow of the first solar cell encapsulant generated during lamination, the flow of the output electrode of the solar cell, the electrode hole of the first solar cell encapsulant, and the electrode hole of the back cover may occur. When the positional relationship changes, there is a high possibility that the output electrode contacts the back cover. That is, when the back cover is provided with a moisture-proof layer made of a conductor such as aluminum for the purpose of the moisture-proof effect, there is a possibility that electricity generated by the solar cell may leak to the back cover through the output electrode. There was a problem.

In view of the above, the present invention focuses on the above-mentioned problems, and provides a solar cell module and a method of manufacturing the solar cell module, in which even if a moisture-proof layer made of a conductor such as aluminum is provided on the back cover, there is no risk of electric leakage in the back cover. It is intended to provide.

[0006]

To achieve the above object, according to the first aspect of the present invention, a front cover, a second solar cell sealing material, a solar cell, and a first solar cell sealing are provided. The material and the back cover are laminated and bonded in this order, and the output electrode of the solar cell is inserted into the electrode hole provided in the first solar cell sealing material and the electrode hole provided in the back cover. In the solar cell module exposed to the back cover side, the diameter of the electrode hole of the back cover is formed larger than the diameter of the electrode hole of the first solar cell sealing material, and the output electrode is formed on the back cover. Is not made to contact the inner peripheral surface of the electrode hole.

In order to achieve the above object, according to the second aspect of the present invention, an electrode hole is previously formed in each of the first solar cell sealing material and the back cover, and the front cover and the second solar cell are formed. The battery cell encapsulant, the solar cell, the first solar cell encapsulant, and the back cover are laminated in this order, and the output electrode of the solar cell is connected to the electrode hole of the first solar cell encapsulant. In addition, in a method for manufacturing a solar cell module in which the laminate is bonded at a predetermined pressure and temperature by exposing the back cover side by inserting the electrode into the electrode hole of the back cover, the diameter of the electrode hole of the back cover is adjusted. The diameter of the electrode hole of the first solar cell sealing material is larger than the diameter of the electrode hole so that the output electrode does not contact the inner peripheral surface of the electrode hole of the back cover.

Further, in order to achieve the above object,
According to the third aspect of the invention, the front cover, the second solar cell encapsulant, the solar cell, the first solar cell encapsulant, and the back cover are laminated and adhered in this order, and the output electrode of the solar cell is provided. Are inserted into the electrode holes provided in the first solar cell sealing material and the electrode holes provided in the back cover and are exposed on the back side of the back cover, and the exposed output electrode terminals are In a solar cell module in which an output terminal protection cover to be protected is provided on the back side of the back cover, the insulating film having an electrode hole having a smaller hole diameter than the electrode hole of the back cover includes the back cover and the first solar cell. Provided between the battery cell encapsulant, between the back cover and the output terminal protection cover, or both, the output electrode of the solar cell is inserted through the electrode hole of the insulating film. And those are.

Furthermore, in order to achieve the above object,
In the invention according to claim 4, an electrode hole is previously formed in each of the first solar cell sealing material and the back cover, and the front cover, the second solar cell sealing material, the solar cell,
The first solar cell sealing material and the back cover are laminated in this order, and the output electrode of the solar cell is inserted into the electrode hole of the first solar cell sealing material and the electrode hole of the back cover. In the method for manufacturing a solar cell module in which the polymer is exposed to the back cover side and then the polymer is bonded at a predetermined pressure and temperature, the insulating film having an electrode hole having a smaller diameter than the electrode hole of the back cover. Is provided between the back cover and the first solar cell sealing material, or between the back cover and the output terminal protection cover, or both, and the output electrode of the solar cell is inserted into the electrode hole of the insulating film. Things.

Further, in order to achieve the above object,
In the invention according to claim 5, the front cover, the second solar cell sealing material, the solar cell, the first solar cell sealing material, and the back cover are laminated and adhered in this order, and the output electrode of the solar cell is formed. Is inserted through the electrode hole provided in the first solar cell sealing material and the electrode hole provided in the back cover, and is exposed on the back cover side. The portion of the output electrode inserted into the electrode hole is covered with an insulator.

Furthermore, in order to achieve the above object,
In the invention according to claim 6, an electrode hole is formed in each of the first solar cell sealing material and the back cover in advance, and the front cover, the second solar cell sealing material, the solar cell,
The first solar cell sealing material and the back cover are laminated in this order, and the output electrode of the solar cell is inserted into the electrode hole of the first solar cell sealing material and the electrode hole of the back cover. In the method of manufacturing a solar cell module in which the polymer is exposed to the back cover side and then the polymer is bonded at a predetermined pressure and temperature, the solar cell in which a portion inserted into the electrode hole is covered with an insulator Are used.

Furthermore, in order to achieve the above object,
In the invention according to claim 7, the back cover includes a conductor layer and an insulator layer laminated on at least one side of the conductor layer, and includes a front cover, a second solar cell sealing material, and a solar cell. The battery cell, the first solar cell sealing material, and the back cover are laminated and adhered in this order, and the output electrode of the solar cell is provided with an electrode hole and a back cover provided in the first solar cell sealing material. In the solar cell module that is inserted into the electrode hole provided on the back cover side and is exposed on the back cover side, the solar cell module is formed in the conductor layer as compared with the electrode hole diameter formed in the insulator layer of the back cover. The diameter of the electrode hole is made large so that the output electrode does not contact the inner peripheral surface of the electrode hole of the conductor layer.

Further, in order to achieve the above object,
In the invention according to claim 8, the back cover includes a conductor layer and an insulator layer laminated on at least one side of the conductor layer, and each of the first solar cell sealing material and the back cover Drill holes for electrodes in advance,
The second solar cell encapsulant, the solar cell, the first solar cell encapsulant, and the back cover are laminated in this order, and the output electrode of the solar cell is connected to the first solar cell encapsulant. In the method for manufacturing a solar cell module in which the laminated body is joined at a predetermined pressure and temperature by exposing it to the back cover side by inserting the electrode hole and the electrode hole of the back cover into an insulating layer, Using a back cover in which the diameter of the electrode hole formed in the conductor layer is larger than the diameter of the electrode hole that has been made, the output electrode is prevented from contacting the inner peripheral surface of the electrode hole of the conductor layer. Things.

According to a ninth aspect of the present invention, in the solar cell module according to any one of the first to third aspects, the back cover having a moisture-proof layer made of aluminum on the back cover. It was used.

Further, in the invention according to claim 10,
The method for manufacturing a solar cell module according to any one of claims 2, 4, 6, and 8, wherein a back cover having a moisture-proof layer made of aluminum is used for the back cover.

According to the first aspect of the present invention, the diameter of the electrode hole of the back cover is formed larger than the diameter of the electrode hole of the first solar cell sealing material, and the output electrode is formed on the back cover. Since it is made so as not to contact the inner peripheral surface of the electrode hole, even if a slight error occurs in the positional relationship between the output electrode of the solar cell and the back cover inserted into the electrode hole of the back cover, A gap is reliably ensured between them, whereby it is possible to reliably prevent electricity generated by the solar cell from leaking to the back cover through the output electrode.

According to the second aspect of the present invention, since the diameter of the electrode hole of the back cover is made larger than the diameter of the electrode hole of the first solar cell cell sealing material, the predetermined pressure and temperature are determined. Positional relationship between the output electrode of the solar cell, the electrode hole of the first solar cell sealing material, and the electrode hole of the back cover due to the flow of the first solar cell sealing material generated at the time of joining at a step. Even if the output voltage changes, the output electrode can be prevented from contacting the back cover. That is, even if a moisture-proof layer made of a conductor such as aluminum is provided on the back cover for the purpose of moisture-proof effect, there is no possibility that electricity generated by the solar battery cells leaks to the back cover through the output electrode.

According to the third aspect of the present invention, the insulating film having the electrode hole having a smaller diameter than the electrode hole of the back cover is provided between the back cover and the first solar cell sealing material or the back cover. And the output terminal protection cover, or both, and the output electrode of the solar cell is inserted into the electrode hole of the insulating film, so the solar cell inserted into the electrode hole of the back cover Even if there is some error in the positional relationship between the output electrode and the back cover, the output electrode and the back cover do not come into direct contact with each other due to the insulating film, so that the electricity generated by the solar cells passes through the output electrode and the back cover. Leakage can be reliably prevented.

According to the fourth aspect of the present invention, the insulating film having an electrode hole having a smaller diameter than the electrode hole of the back cover is provided between the back cover and the first solar cell sealing material or the back cover. And the output terminal protection cover, or both, so that the output electrode of the solar cell is inserted into the electrode hole of the insulating film. Even if the positional relationship between the output electrode of the solar cell and the electrode hole of the first solar cell sealing material and the electrode hole of the back cover is changed, the output electrode is prevented from contacting the back cover. Can be. That is, even if a moisture-proof layer made of a conductor such as aluminum is provided on the back cover for the purpose of moisture-proof effect, there is no possibility that electricity generated by the solar battery cells leaks to the back cover through the output electrode.

According to the fifth aspect of the present invention, since the portion of the output electrode of the solar cell that is inserted into the electrode hole is covered with an insulator, the solar cell that is inserted into the electrode hole of the back cover is inserted. Even if there is some error in the positional relationship between the output electrode of the cell and the back cover, it is possible to reliably prevent electricity generated by the solar cell from leaking to the back cover through the output electrode.

[0021] In the invention according to claim 6, the output electrode of the solar battery cell in which the portion inserted into the electrode hole is covered with an insulator is used. Even if a moisture-proof layer made of a conductor such as aluminum is provided, there is no possibility that electricity generated by the solar cell leaks to the back cover through the output electrode.

In the invention according to claim 7, the diameter of the electrode hole formed in the conductor layer is made larger than the diameter of the electrode hole formed in the insulator layer of the back cover, and the output electrode is formed of the conductor layer. Is prevented from coming into contact with the inner peripheral surface of the electrode hole of (1), so that electricity generated by the solar cell can be reliably prevented from leaking to the back cover through the output electrode.

According to the eighth aspect of the present invention, a back cover is used in which the diameter of the electrode hole formed in the conductor layer is larger than the diameter of the electrode hole formed in the insulator layer, and the output electrode is formed. Since the inner surface of the conductor layer is prevented from contacting the inner peripheral surface of the electrode hole, there is no possibility that electricity generated by the solar battery cell leaks to the back cover through the output electrode.

According to the ninth and tenth aspects of the present invention, since the back cover having the moisture-proof layer made of aluminum is used for the back cover, a high moisture-proof effect can be obtained while the thickness of the solar cell module is reduced.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A solar cell module according to an embodiment of the present invention and a method for manufacturing the same will be described in detail with reference to FIGS. 1 is a conceptual diagram of the assembly of the solar cell module, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. 3 is a sectional view showing a completed solar cell module. In the drawing, 1 is a front cover, 2a is a second solar cell sealing material, 2
b is a first solar cell sealing material, 3 is a solar cell, 4
Is a back cover, 5 is an output terminal protection cover, and 6 is an end sealing material. In FIG. 1, the upper surface of the protective cover 5 is removed to make it easier to see.

The front cover 1 is made of glass or plastic, and is disposed and used on the light receiving surface side of the solar cell module M.

The first solar cell encapsulant 2b and the second solar cell encapsulant 2a are sheet-like resins made of ethylene vinyl acetate copolymer (EVA) or the like. It is arranged on each side of the cell 3.

The solar cells 3 are made of single-crystal silicon, polycrystalline silicon, amorphous, compound semiconductor, or the like. Connected
It has a pair of output electrodes 31, 31.

The back cover 4 has a structure in which aluminum (moisture-proof layer) is sandwiched between vinyl fluoride resin or polyethylene terephthalate (PET), and is disposed on the back side of the solar cell module M.

The output terminal protection cover 5 is bonded to the back cover 4, and an electrode hole 51 is provided on the side of the bonding surface to the back cover 4. Further, the output terminal protection cover 5 is provided with an output cable 52 to be connected to the output electrodes 31 of the solar cell 3.

The end sealing member 6 comprises the front cover 1 and the first and second solar cell sealing members 2b, 2a.
And the solar cell 3 and the back cover 4 are attached to the outer edge of the laminate.

When the solar cell module M is manufactured, a pair of electrode holes 21, 21, 21, 21, 21 is provided in each of the first solar cell sealing material 2 b and the back cover 4 provided on the back side of the solar cell module M. Open 41,41. At this time, the diameter of the electrode hole 41 of the back cover 4 is made larger than the diameter of the electrode hole 21 of the first solar cell sealing material 2b. The diameter of the electrode hole 41 of the back cover 4 depends on the cross-sectional shape of the output electrode 31, but is preferably at least 1 mm and preferably 2 mm or more. Further, the electrode hole 41 of the back cover 4 needs to be set to a diameter and a position so as not to protrude from the output terminal protection cover 5 to be adhered later, in order to have moisture-proof and protection performance. For example, when the output electrode 31 is a flat plate having a width of 6 mm and a thickness of 0.5 mm, the electrode hole 21 of the solar cell sealing material 2b has a diameter of 8 mm, and the electrode hole 41 of the back cover 4 has a diameter of 12 mm. It is desirable to do. Also, the electrode holes 21, 21, 41,
It is desirable that the pitch between 41 is 25 mm.

First, the front cover 1, the second solar cell encapsulant 2a, the solar cell 3, the first solar cell encapsulant 2b, and the back cover 4 are laminated in this order. Of the first electrodes 31
Are inserted into the electrode holes 21 and 21 of the solar cell sealing material 2b and the electrode holes 41 and 41 of the back cover 4 to be exposed to the back cover 4 side. At this time, the electrode hole 21 of the first solar cell sealing material 2b and the electrode hole 41 of the back cover 4 have the same center position, and the output electrode 31 of the solar cell 3 is Is positioned at the center of the electrode hole 41 so as not to contact the electrode hole 41. afterwards,
The front cover 1, the first and second solar cell sealing materials 2b, 2a, the solar cells 3, and the back cover 4.
Are bonded at a predetermined pressure (about 1 atm) and temperature (about 100 ° C.).

When the laminate is joined in this manner, the output electrodes 31 of the solar cell 3 are passed through the electrode holes 51 of the output terminal protection cover 5, and the output electrodes 31, 31 are output inside the output terminal protection cover 5. 31 and the output cable 52 are connected. Further, the output terminal protection cover 5 is adhered to the back cover 4 at a position where the electrode hole 41 is hidden, and the space inside the output terminal protection cover 5 is filled with a filler 53 such as silicon and a lid 54 is attached. To completely seal the output terminal protection cover 5.

Finally, the solar cell module M as shown in FIG. 3 is completed by attaching the end sealing material 6 to the outer edge of the laminate.

As described above, in the manufacturing method of the present embodiment, the diameter of the electrode hole 41 of the back cover 4 is made larger than the diameter of the electrode hole 21 of the first solar cell sealing material 2b. The first electrode 31 of the solar cell 3 and the first solar cell sealing material 2b are caused by the flow of the first solar cell sealing material 2b generated at the time of joining the stacked bodies. Electrode holes 21, 21 and back cover 4
Even if the positional relationship with the electrode holes 41, 41 changes, the output electrodes 31, 31 can be prevented from contacting the back cover 4. That is, even though aluminum is provided on the back cover 4 for the purpose of preventing moisture, electricity generated by the solar cell 3 does not leak to the back cover 4 through the output electrodes 31. That is, while preventing leakage to the back cover 4 and reducing the thickness of the solar cell module M,
A high moisture-proof effect can be obtained.

Next, a solar cell module according to another embodiment of the present invention and a method of manufacturing the same will be described with reference to FIGS. In the following embodiments, the basic configuration of the solar cell module is substantially the same as that of the first embodiment. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof will be omitted, and only different components will be described with different reference numerals.

FIG. 4 is a conceptual diagram of the assembly of a solar cell module.
FIG. 5 is an enlarged view of a main part of FIG. The difference between the solar cell module M according to the present embodiment and the above-described embodiment is that the insulating film 7 having the electrode holes 71 and 71 having a smaller hole diameter than the electrode hole 41 of the back cover 4.
Is provided between the back cover 4 and the first solar cell sealing material 2b, and the output electrodes 31, 31 of the solar cell M are inserted into the electrode holes 71, 71 of the insulating film 7. is there.

The insulating film 7 is provided between the back cover 4 and the first solar cell sealing material 2b, but may be provided between the back cover 4 and the output terminal protection cover 5. Alternatively, the insulating film 7 is provided both between the back cover 4 and the first solar cell sealing material 2b and between the back cover 4 and the first solar cell sealing material 2b. May be provided between the back cover 4 and the output terminal protection cover 5.

The insulating film 7 may have any electrical insulation properties. For example, a film made of a fluorine-containing resin or polyethylene terephthalate can be suitably used. The thickness of the insulating film 7 is preferably as thin as the strength allows. 0.1-0.2m
A thickness of m is preferred. The outer shape of the insulating film 7 is made larger than the electrode hole 41 of the back cover 4 and is 100 ×
The shape is 50 mm square, but may be circular or elliptical.

When the solar cell module M is manufactured, the first solar cell sealing material 2b, the insulating film 7 and the back cover 4 provided on the back side of the solar cell module M are provided.
In advance, a pair of electrode holes 21, 21, 71, 7
Open 1,41,41. At this time, the diameter of the electrode hole 71 of the insulating film 7 is made smaller than the diameter of the electrode hole 41 of the back cover 4. For example, the output electrode 31 has a width of 6 m.
In the case of a flat plate having a thickness of 0.5 mm and a thickness of 0.5 mm, the insulating film 7
Hole 71 for electrode and electrode hole 2 for solar cell sealing material 2b
1 has a diameter of 8 mm and an electrode hole 41 of the back cover 4.
Is preferably 12 mm in diameter. In addition, the electrode holes 21,
The pitch between 21, 71, 71, 41, 41 is desirably 25 mm.

First, the insulating film 7 is placed on the back side of the back cover 4 (ie, on the side of the first solar cell sealing material 2b).
Glue to At this time, the respective electrode holes 71, 7
The centers of 1, 41 and 41 are aligned. Then, the front cover 1, the second solar cell encapsulant 2a, the solar cell 3, the first solar cell encapsulant 2b, and the back cover 4 to which the insulating film 7 is adhered are laminated in this order, The output electrodes 31, 31 of the solar cell 3 are connected to the first
Through the electrode holes 21 and 21 of the solar cell sealing material 2b, the electrode holes 71 and 71 of the insulating film 7, and the electrode holes 41 and 41 of the back cover 4 to be exposed to the back cover 4 side. Thereafter, a laminate composed of the front cover 1, the first and second solar cell sealing materials 2b and 2a, the solar cells 3 and the back cover 4 is subjected to a predetermined pressure (about 1 atm) and a temperature (about 100 ° C.). ).

The steps after joining the laminates in this way are the same as the steps of the first embodiment, and the description is omitted. Finally, the solar cell module M as shown in FIG. 3 is completed by attaching the end sealing material 6 to the outer edge of the laminate.

As described above, according to the manufacturing method of the present embodiment, the insulating film 7 having the electrode holes 71 having a hole diameter smaller than the electrode hole diameter 41 of the back cover 4 is used.
Since it is inserted between the back cover 4 and the first solar cell sealing material 2b and the output electrode 31 of the solar cell 3 is inserted into the electrode hole 71 of the insulating film 7, the first electrode generated at the time of lamination is formed. Of the solar cell sealing material 2b, the output electrode 31 of the solar cell 3 and the electrode hole 21 of the first solar cell sealing material 2b and the back cover 4
Even if the positional relationship with the electrode hole 41 changes, the output electrode 31 can be prevented from contacting the back cover 4. That is, even if a moisture-proof layer made of a conductor such as aluminum is provided on the back cover 4 for the purpose of moisture-proof effect, there is no possibility that electricity generated by the solar cell 3 leaks to the back cover 4 through the output electrode 31. .

Next, a solar cell module according to another embodiment of the present invention and a method of manufacturing the same will be described with reference to FIGS. FIG. 6 is a conceptual diagram of the assembly of the solar cell module, and FIG. 7 is an enlarged view of a main part of FIG. The difference between the solar cell module M according to the present embodiment and the above-described embodiment is that a portion inserted into the electrode holes 21 and 41 of the output electrode 31 of the solar cell 3 is covered with an insulator 311. That is. As the insulator 311, for example, a synthetic resin having excellent electrical insulation properties such as polytetrafluoroethylene and polyethylene terephthalate is used, and the coating method is to adhere with an adhesive or the like. In addition,
Since the solar cell module M and the method of manufacturing the same in the present embodiment are the same as those described in the first embodiment, detailed description will be omitted.

In the solar cell module M according to the present embodiment, the output electrodes 3 of the solar cells 3 whose portions inserted into the electrode holes 21 and 41 are covered with the insulator 311.
Therefore, even if a moisture-proof layer made of a conductor such as aluminum is provided on the back cover 4 for the purpose of providing a moisture-proof effect, the output electrode 31 and the back cover 4 do not come into direct contact with each other. There is no risk that the electricity generated in the cell 3 will leak to the back cover 4 through the output electrode 31.

Next, a solar cell module according to another embodiment of the present invention and a method of manufacturing the same will be described with reference to FIG. FIG. 8 is an enlarged view of a main part of the solar cell module. Solar cell module M in the present embodiment
However, what is different from the above embodiment is that the back cover 4
Is composed of a conductor layer 42 made of aluminum, and insulator layers 43, 43 laminated on both sides of the conductor layer 42, and the electrode hole diameter 431 formed in the insulator layer 43 of the back cover 4. In comparison with the above, the diameter of the electrode hole 421 formed in the conductor layer 42 is made larger, so that the output electrode 31 does not contact the inner peripheral surface of the electrode hole 421 of the conductor layer 42.

Specifically, the output electrode 31 has a width of 6 mm,
It is a flat plate having a thickness of 0.5 mm. Electrode hole 43 formed in insulator layer 43 of back cover 4
1 has a diameter of 10 mm, and the electrode hole 421 formed in the conductor layer 42 has a diameter of 12 mm. The solar cell module M according to the present embodiment
The configuration and the manufacturing method thereof are the same as those shown in the first embodiment except for the above, and a detailed description thereof will be omitted.

As described above, in the solar cell module M according to the present embodiment, the diameter of the electrode hole 431 formed in the conductor layer 42 is smaller than the diameter of the electrode hole 431 formed in the insulator layer 43. The output electrode 31 is not in contact with the inner peripheral surface of the electrode hole 421 of the conductor layer 42 because the back cover 4 having a large diameter is used. There is no danger of leakage to the back cover 4 through the

The back cover 4 having the conductor layer 42 (moisture-proof layer) made of aluminum on the back cover 4
Is used, a high moisture-proof effect can be obtained while the thickness of the solar cell module M is reduced.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and a design change or the like may be made without departing from the gist of the present invention. Even if present, it is included in the present invention. For example,
The pressure and the heating temperature at the time of laminating and joining are not limited to the numerical values described in the embodiment, and may be appropriately changed according to the materials of the members constituting the solar cell module. Further, the diameter of the electrode hole of the first solar cell sealing material and the diameter of the electrode hole of the back cover are appropriately changed according to the cross-sectional shape of the output electrode.

[0052]

According to the solar cell module of the first aspect, the diameter of the electrode hole of the back cover is formed larger than the diameter of the electrode hole of the first solar cell sealing material. Therefore, even if a slight error occurs in the positional relationship between the output power of the solar cell inserted into the electrode hole of the back cover and the back cover, a gap is reliably secured between them, Electricity generated by the battery cells can be reliably prevented from leaking to the back cover through the output electrode.

In the method for manufacturing a solar cell module according to the second aspect, the output electrode of the solar cell and the first solar cell are caused by the flow of the first solar cell encapsulant generated when the laminate is joined. Even if the positional relationship between the electrode hole of the cell sealing material and the electrode hole of the back cover changes, the output electrode can be prevented from contacting the back cover. Even if the moisture-proof layer made of is provided, there is no possibility that electricity generated by the solar battery cell leaks to the back cover through the output electrode.

According to the third aspect of the present invention, the insulating film having the electrode hole having a smaller diameter than the electrode hole of the back cover is provided between the back cover and the first solar cell sealing material or the back cover. And between the output terminal protection cover or both, and the output electrode of the solar cell is inserted through the electrode hole of the insulating film, so the solar cell inserted through the electrode hole of the back cover Even if there is some error in the positional relationship between the output electrode and the back cover, a gap is surely secured between them, so that electricity generated by the solar cells leaks to the back cover through the output electrode. Can be reliably prevented.

According to the fourth aspect of the present invention, the insulating film having an electrode hole having a smaller diameter than the electrode hole of the back cover is provided between the back cover and the first solar cell sealing material or the back cover. And between the output terminal protection cover or both, so that the output electrode of the solar cell is inserted through the electrode hole of the insulating film,
The position of the output electrode of the solar cell, the electrode hole of the first solar cell sealing material, and the electrode hole of the back cover due to the flow of the first solar cell sealing material generated at the time of joining the laminate. Even if the relationship changes, the output electrode can be prevented from contacting the back cover. That is, even if a moisture-proof layer made of a conductor such as aluminum is provided on the back cover for the purpose of moisture-proof effect, there is no possibility that electricity generated by the solar battery cells leaks to the back cover through the output electrode.

According to the fifth aspect of the present invention, the portion of the output electrode of the solar cell that is inserted into the electrode hole is covered with an insulator, so that the solar cell that is inserted into the electrode hole of the back cover is inserted. Even if there is some error in the positional relationship between the output electrode of the cell and the back cover, it is possible to reliably prevent electricity generated by the solar cell from leaking to the back cover through the output electrode. Therefore, even if a moisture-proof layer made of a conductor such as aluminum is provided on the back cover for the purpose of providing a moisture-proof effect, there is no possibility that electricity generated by the solar cell will leak to the back cover through the output electrode.

According to the sixth aspect of the present invention, the output electrode of the solar cell in which the portion inserted into the electrode hole is covered with an insulator is used. Even if a moisture-proof layer made of a conductor such as aluminum is provided, there is no possibility that electricity generated by the solar cell leaks to the back cover through the output electrode. Therefore, even if a moisture-proof layer made of a conductor such as aluminum is provided on the back cover for the purpose of providing a moisture-proof effect, there is no possibility that electricity generated by the solar cell will leak to the back cover through the output electrode.

According to the seventh aspect of the present invention, the diameter of the electrode hole formed in the conductor layer is made larger than the diameter of the electrode hole formed in the insulator layer of the back cover, and the output electrode is formed of the conductor layer. Is prevented from coming into contact with the inner peripheral surface of the electrode hole of (1), so that electricity generated by the solar cell can be reliably prevented from leaking to the back cover through the output electrode. Therefore, even if a moisture-proof layer made of a conductor such as aluminum is provided on the back cover for the purpose of providing a moisture-proof effect, there is no possibility that electricity generated by the solar cell will leak to the back cover through the output electrode.

According to the eighth aspect of the present invention, a back cover is used in which the diameter of the electrode hole formed in the conductor layer is larger than the diameter of the electrode hole formed in the insulator layer. Since the inner surface of the conductor layer is prevented from contacting the inner peripheral surface of the electrode hole, there is no possibility that electricity generated by the solar battery cell leaks to the back cover through the output electrode. Therefore,
Even if a moisture-proof layer made of a conductor such as aluminum is provided on the back cover for the purpose of a moisture-proof effect, there is no possibility that electricity generated by the solar cell will leak to the back cover through the output electrode.

According to the ninth and tenth aspects of the present invention, since the back cover having the moisture-proof layer made of aluminum is used for the back cover, a high moisture-proof effect can be obtained while the thickness of the solar cell module is reduced.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of an assembly of a solar cell module according to an embodiment.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a sectional view showing a completed solar cell module.

FIG. 4 is an assembly conceptual diagram of a solar cell module according to another embodiment.

FIG. 5 is an enlarged view of a main part of FIG. 4;

FIG. 6 is a conceptual diagram of assembly of a solar cell module according to another embodiment.

FIG. 7 is an enlarged view of a main part of FIG. 6;

FIG. 8 is an enlarged view of a main part of a solar cell module according to another embodiment.

[Explanation of symbols]

 M Solar cell module 1 Front cover 2a Second solar cell sealing material 2b First solar cell sealing material 21 Electrode hole 3 Solar cell 31, 31 Output electrode 311 Insulator 4 Back cover 41 Electrode hole 42 Conductor Layer 43 Insulator Layer 5 Output Terminal Protective Cover 51 Electrode Hole 52 Output Cable 6 End Seal 7 Insulating Film 71 Electrode Hole

Claims (10)

[Claims] 1. A front cover, a second solar cell encapsulant, a solar cell, a first solar cell encapsulant, and a back cover are laminated and adhered in this order, and the output electrode of the solar cell is In the solar cell module, which is inserted into the electrode hole provided in the solar cell sealing material and the electrode hole provided in the back cover and is exposed on the back cover side, the electrode hole of the back cover Is formed to be larger than the diameter of the electrode hole of the first solar cell sealing material, so that the output electrode does not contact the inner peripheral surface of the electrode hole of the back cover. Solar cell module. 2. An electrode hole is formed in each of the first solar cell sealing material and the back cover, and the front cover,
The second solar cell encapsulant, the solar cell, the first solar cell encapsulant, and the back cover are laminated in this order, and the output electrode of the solar cell is connected to the first solar cell encapsulant. In the method for manufacturing a solar cell module in which the laminated body is exposed to the back cover side by being inserted into the electrode hole of the back cover and the electrode hole of the back cover, and then the laminate is bonded at a predetermined pressure and temperature, A solar cell, wherein the diameter of the hole is larger than the diameter of the electrode hole of the first solar cell sealing material so that the output electrode does not contact the inner peripheral surface of the electrode hole of the back cover. Module manufacturing method. 3. A front cover, a second solar cell encapsulant, a solar cell, a first solar cell encapsulant, and a back cover are laminated and adhered in this order, and the output electrode of the solar cell is An output which is inserted into the electrode hole provided in the solar cell sealing material and the electrode hole provided in the back cover and is exposed on the back side of the back cover to protect the exposed output electrode terminal. In a solar cell module in which a terminal protection cover is provided on the back side of the back cover, the insulating film having an electrode hole having a smaller hole diameter than the electrode hole of the back cover is formed by sealing the back cover and the first solar cell cell. Between the backing material and / or between the back cover and the output terminal protection cover, and the output electrode of the solar cell is inserted through the electrode hole of the insulating film. Solar cell module according to claim. 4. An electrode hole is formed in each of the first solar cell sealing material and the back cover, and the front cover,
The second solar cell encapsulant, the solar cell, the first solar cell encapsulant, and the back cover are laminated in this order, and the output electrode of the solar cell is connected to the first solar cell encapsulant. In the method for manufacturing a solar cell module in which the laminated body is exposed to the back cover side by being inserted into the electrode hole of the back cover and the electrode hole of the back cover, and then the laminate is bonded at a predetermined pressure and temperature, An insulating film having an electrode hole having a smaller diameter than the hole, provided between the back cover and the first solar cell sealing material, or between the back cover and the output terminal protective cover, or both, A method for manufacturing a solar cell module, comprising inserting an output electrode of a cell into an electrode hole of an insulating film. 5. A front cover, a second solar cell encapsulant, a solar cell, a first solar cell encapsulant, and a back cover are laminated and bonded in this order, and the output electrode of the solar cell is 1. A solar cell module which is inserted into an electrode hole provided in a solar cell sealing material and an electrode hole provided in a back cover and is exposed on the back cover side, wherein an output electrode of the solar cell is provided. A solar cell module, wherein a portion inserted into the electrode hole is covered with an insulator. 6. An electrode hole is formed in each of the first solar cell sealing material and the back cover, and the front cover,
The second solar cell encapsulant, the solar cell, the first solar cell encapsulant, and the back cover are laminated in this order, and the output electrode of the solar cell is connected to the first solar cell encapsulant. In the method for manufacturing a solar cell module in which the laminated body is joined at a predetermined pressure and temperature by exposing the back cover side by inserting the electrode hole and the electrode hole of the back cover through the electrode hole, A method for manufacturing a solar cell module, comprising using an output electrode of a solar cell in which a portion to be covered is covered with an insulator. 7. A back cover comprising a conductor layer and an insulator layer laminated on at least one side of the conductor layer, wherein a front cover, a second solar cell sealing material, a solar cell, The first solar cell sealing material and the back cover are laminated and adhered in this order, and the output electrode of the solar cell is provided in the electrode hole provided in the first solar cell sealing material and in the back cover. The diameter of the electrode hole formed in the conductor layer is smaller than the diameter of the electrode hole formed in the insulator layer of the back cover in the solar cell module that is inserted into the electrode hole and exposed to the back cover side. Wherein the output electrode is not in contact with the inner peripheral surface of the electrode hole of the conductor layer. 8. The back cover is composed of a conductor layer and an insulator layer laminated on at least one side of the conductor layer, and the first solar cell sealing material and the back cover are each provided with an electrode in advance. A hole is opened, a front cover, a second solar cell sealing material, a solar cell, a first solar cell sealing material, and a back cover are laminated in this order, and the output electrode of the solar cell is Production of a solar cell module in which the laminated body is exposed to the back cover side by being inserted into the electrode hole of the solar cell sealing material and the electrode hole of the back cover, and then the laminate is bonded at a predetermined pressure and temperature. In the method, a back cover is used in which the diameter of the electrode hole formed in the conductor layer is larger than the diameter of the electrode hole formed in the insulator layer, and the output electrode is formed in the electrode hole of the conductor layer. Week Method of manufacturing a solar cell module is characterized in that to avoid contact with. 9. The solar cell module according to claim 1, wherein a back cover having a moisture-proof layer made of aluminum is used for the back cover. module. 10. The method for manufacturing a solar cell module according to claim 2, wherein a back cover having a moisture-proof layer made of aluminum is used for the back cover. Of manufacturing solar cell module.