JP5459766B2 - Solar cell panel, method for suppressing electrification of solar cell panel, and solar power generator for artificial satellite - Google Patents

Description

  The present invention relates to a solar cell panel that suppresses charging on the surface of a cover glass, a method for suppressing charging of a solar cell panel, and a solar power generation device for mounting on an artificial satellite.

A solar panel used in a satellite-mounted photovoltaic power generation apparatus has an insulating sheet (insulator), a solar cell / interconnect (conductor), a cover glass (cover glass) around a solar cell array in an orbital vacuum environment. A triple point composed of an insulator is formed.
On the orbit, it is known that the surface of the cover glass is often charged when solar activity is active and substorm occurs.
When the surface of the cover glass is charged, frequent discharge occurs at the above triple points, resulting in deterioration of the performance of the solar cells, generation of sustained discharge between the arrays and the accompanying burning of the insulating sheet, and generation of ground faults in the array circuit. There is a possibility that problems such as a decrease in power will occur.

FIG. 2 is a cross-sectional view of a solar cell panel according to a reference example.
As shown in this figure, a solar cell panel having a conductive layer (conductive coating) on the surface of a cover crow is known (see, for example, Patent Documents 1 to 3).
Furthermore, in the solar cell panels shown in Patent Documents 1 and 2, the gap between cells is filled with a conductive adhesive, and in the solar cell panel shown in Patent Document 3, a conductive adhesive is applied to the end surface of the panel. It is applied.
According to the solar cell panel configured as described above, since the entire surface of the solar cell panel is covered with the conductive layer or the conductive adhesive, charging of the cover glass surface itself can be prevented.

Japanese Patent Laid-Open No. 02-177576 JP-T-2004-506329 Special table 2001-516513 gazette

However, the solar cell panel having the antistatic structure as described above has the following problems.
The first problem is an increase in manufacturing cost.
The reason is that it is necessary to form a conductive layer with a conductive coating or the like on the entire surface of the cover glass.
The second problem is that durability may be reduced.
The reason is that the durability of the conductive layer formed on the surface of the cover glass may be inferior to the durability of the cover glass surface. In particular, the conductive layer formed at the corner formed by the surface and the end surface of the cover glass is likely to be damaged or worn by contact with an object.
The third problem is that power generation performance may be reduced.
The reason is that the translucency of the conductive layer formed on the surface of the cover glass may be inferior to the translucency of the cover glass surface. In particular, in the case of a conductive layer whose translucency is reduced due to time degradation, the power generation performance is significantly reduced.

  The object of the present invention is to suppress the charging of the cover glass surface, which is the above-mentioned problem, while eliminating the need for the conductive layer on the cover glass surface and reducing the manufacturing cost. An object of the present invention is to provide a solar cell panel, a method for suppressing charging of the solar cell panel, and a solar power generation device mounted on an artificial satellite, which can prevent the durability and power generation performance from being lowered due to the conductive layer.

  In order to achieve the above object, a solar cell panel according to the present invention connects an insulating layer serving as a support base, a plurality of solar cells arranged on the insulating layer with a gap therebetween, and the solar cells. An interconnector that is stacked on the solar battery cell, and has an exposed cover glass that does not have a conductive layer on the surface, and an end face of the cover glass, the solar battery cell, the interconnector, and the insulating layer And a high-resistance conductive adhesive filled in the gap.

  Further, the method for suppressing charge of a solar battery panel according to the present invention comprises connecting an insulating layer serving as a support base, a plurality of solar battery cells arranged on the insulating layer with a gap therebetween, and the solar battery cells. An interconnector, and a cover glass laminated on the solar battery cell, the object is a solar battery panel, the surface of the cover glass is exposed without a conductive layer, and in the gap, The cover glass is filled with a high-resistance conductive adhesive that contacts the end face of the cover glass, the solar battery cell, the interconnector, and the insulating layer, and the surface of the cover glass is charged with the charge on the end face of the cover glass. This is a method of discharging at the contact portion with the resistive conductive adhesive and the surface of the cover glass.

  Moreover, the solar power generation device for mounting on an artificial satellite according to the present invention includes a solar cell panel that generates power with sunlight, and the solar cell panel is provided with an insulating layer serving as a support base and a gap between the insulating layer and the insulating layer. A plurality of solar cells arranged in a row, an interconnector for connecting the solar cells, an exposed cover glass that is laminated on the solar cells and has a surface not provided with a conductive layer, and the cover glass And a high resistance conductive adhesive filled in the gap so as to contact the end face, the solar battery cell, the interconnector, and the insulating layer.

  According to the present invention, while suppressing the charging of the cover glass surface, the conductive layer on the surface of the cover glass is not required, the manufacturing cost can be suppressed, and the durability caused by the conductive layer on the surface of the cover glass can be reduced. It is also possible to prevent degradation of power generation performance and power generation performance.

It is sectional drawing of the solar cell panel which concerns on embodiment of this invention. It is sectional drawing of the solar cell panel which concerns on a reference example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a solar cell panel according to an embodiment of the present invention.
A solar cell panel 1 shown in this figure is used for a solar power generation device for satellite installation, and includes an insulating layer 2, a solar cell 3, an interconnector 4, a cover glass 5, and a high resistance conductive material. The adhesive 6 is comprised.

  The insulating layer 2 is a portion that becomes a support base of the solar battery cell 3. In this embodiment, the insulating layer 2 is configured by laminating an insulating sheet 8 and an insulating adhesive 9 on the substrate 7.

  The solar cells 3 are power generation elements constituting a solar cell array, and are arranged on the insulating layer 2 with a gap 10 therebetween.

  The interconnector 4 is a conductor component that connects the solar cells 3 to each other. For example, the interconnecting portion 4a having an inverted U-shaped cross section and one end of the connecting portion 4a are extended outwardly to measure the solar cell on one side. The first connection portion 4b connected to the lower surface of the battery 3 and the second connection portion 4c extending outward from the other end of the connecting portion 4a and connected to the upper surface of the solar cell 3 on the other side are integrated. It is prepared for.

  The cover glass 5 is an insulator that protects the surface of the solar battery cell 3, and is laminated on the solar battery cell 3 via the insulating adhesive 11. The surface of the cover glass 5 is in an exposed state that does not include a conductive layer, and may be charged on the track.

  The high-resistance conductive adhesive 6 is an adhesive that exhibits high-resistance conductivity after curing, and a gap between the cells so as to contact the end face of the cover glass 5, the solar battery cell 3, the interconnector 4, and the insulating layer 2. 10 is filled.

  That is, in the solar battery panel 1 of the present invention, the surface of the cover glass 5 is exposed without the conductive layer, and the end face of the cover glass 5, the solar battery cell 3, and the interconnector 4 are formed in the gap 10 between the cells. And the high resistance conductive adhesive 6 in contact with the insulating layer 2 is charged to charge the surface of the cover glass 5 to a contact portion between the end surface of the cover glass 5 and the high resistance conductive adhesive 6, and Discharge on the surface of the cover glass 5.

  In this case, since the surface of the cover glass 5 is exposed, charging itself is generated, but the charged charge is discharged through a previously secured path, so that the performance degradation of the solar battery cell 3 due to the discharge, the array It is possible to suppress the charge generated on the surface of the cover glass 5 while solving the problems such as the occurrence of sustained discharge between them and the accompanying burning of the insulating sheet 8 and the decrease in generated power due to the ground fault of the array circuit.

  Moreover, since the conductive layer formed on the surface of the cover glass 5 is not required while suppressing the charge generated on the surface of the cover glass 5, not only the manufacturing cost can be suppressed, but also the conductivity of the cover glass 5 can be suppressed. It is also possible to prevent a decrease in durability and power generation performance due to the layer.

Furthermore, in this embodiment, the high-resistance conductive adhesive 6 is prevented from coming into contact with the corner 5a formed by the surface and the end surface of the cover glass 5.
The reason is that the layer formed at the corner 5a formed by the surface and the end surface of the cover glass 5 is likely to be damaged or worn by contact with the object.

In the present embodiment, the contact area A with the high resistance conductive adhesive 6 on the end face of the cover glass 5 is made wider than the exposed area B on the end face of the cover glass 5.
The reason is that the discharge region between the cover glass 5 and the high resistance conductive adhesive 6 is made as much as possible while avoiding the high resistance conductive adhesive 6 from coming into contact with the corners 5a of the cover glass 5. This is because it can be widely used.

In the present embodiment, a part of the interconnector 4 is protruded from the surface of the high-resistance conductive adhesive 6.
The reason is that while the high-resistance conductive adhesive 6 is filled in the gap 10 between the cells, the inter-cell continuity test and the like are easily performed using the protruding portion (exposed portion) of the interconnector 4. Because it becomes possible.

In the present embodiment, the high-resistance conductive adhesive 6 is also applied to the end face of the solar battery panel 1 so as to contact the end face of the cover glass 5, the solar battery cell 3, and the insulating layer 2.
The reason is that the performance degradation of the solar battery cell 3 due to discharge can be prevented by securing the discharge path in advance on the end face of the solar battery panel 1 as well.

Next, the operation (operation) of the solar cell panel 1 according to the embodiment of the present invention will be described.
In the solar cell panel 1 of the present invention, the surface of the cover glass 5 is exposed without the conductive layer, and the surface of the cover glass 5 is easily charged on the track.

At this time, if the high-resistance conductive adhesive 6 is not filled in the gap 10 between the cells, the portion becomes a vacuum (insulator), and a triple point is formed around the end face of the solar battery cell 3. A situation occurs in which electric discharge occurs.
When discharge occurs at the end face of the solar battery cell 3, the junction part of the solar battery cell 3 is damaged, so that voltage cannot be generated due to leakage, and as a result, the power generation capability of the solar battery cell 3 is impaired. Further, when there is a potential difference between adjacent cells, there is a possibility that sustained discharge occurs between the array circuits.

On the other hand, in the solar cell panel 1 of the present invention, the gap 10 between the cells is filled with the high resistance conductive adhesive 6 that contacts the end face of the cover glass 5, the solar cell 3, the interconnector 4, and the insulating layer 2. Yes.
If it does in this way, the electric charge electrically charged on the surface of the cover glass 5 will be discharged by the contact part of the end surface of the cover glass 5, and the high resistance conductive adhesive 6, and the surface of the cover glass 5. FIG.
In other words, even if the surface of the cover glass 5 is exposed and charging itself is allowed, the charged charge is discharged through a route secured in advance, so that there is a risk of performance deterioration such as the end face of the solar battery cell 3. It is possible to suppress the charging while preventing the electric discharge at.

  As described above, according to the present embodiment, the insulating layer 2 serving as the support base, the plurality of solar cells 3 arranged on the insulating layer 2 with the gap 10 therebetween, and the solar cells 3 An interconnector 4 that connects to the solar cell 3, and an exposed cover glass 5 that does not have a conductive layer on the surface, an end face of the cover glass 5, the solar cell 3, the interconnector 4, and the insulating layer 2. The conductive layer 6 is formed on the surface of the cover glass 5 while suppressing charging on the surface of the cover glass 5. In addition, the manufacturing cost can be suppressed, and the durability and power generation performance due to the conductive layer of the cover glass 5 can be prevented.

Further, since the high-resistance conductive adhesive 6 does not contact the corner 5a formed by the surface and the end surface of the cover glass 5, it can be hardly damaged or worn by contact with the object.
Moreover, since the contact area A with the high resistance conductive adhesive 6 on the end surface of the cover glass 5 is wider than the exposed area B on the end surface of the cover glass 5, the high resistance conductive adhesive 6 is at the corner of the cover glass 5. The discharge region between the cover glass 5 and the high-resistance conductive adhesive 6 can be made as wide as possible while avoiding contact with 5a.

  Further, since a part of the interconnector 4 protrudes from the surface of the high resistance conductive adhesive 6, the interconnector 4 protrudes while filling the gap 10 between the cells with the high resistance conductive adhesive 6. By using the portion (exposed portion), a continuity test between cells can be easily performed.

  Furthermore, since the high resistance conductive adhesive 6 is also applied to the end face of the solar battery panel 1 so as to be in contact with the end face of the cover glass 5, the solar battery cell 3 and the insulating layer 2, However, it is possible to secure a discharge path in advance and prevent performance deterioration of the solar battery cell 3 due to discharge.

  Although the present invention has been described with reference to the embodiment, it is needless to say that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims.

  INDUSTRIAL APPLICABILITY The present invention can be used as a solar cell panel or a method for suppressing the charging of a solar cell panel, and can be particularly suitably used for a solar power generation device mounted on an artificial satellite.

DESCRIPTION OF SYMBOLS 1 Solar cell panel 2 Insulation layer 3 Solar cell 4 Interconnector 5 Cover glass 5a Corner | angular part 6 High resistance conductive adhesive 7 Substrate 8 Insulating sheet 9 Insulating adhesive 10 Gap 11 Insulating adhesive A Contact area B Exposure region

Claims (9)

An insulating layer as a support base;
A plurality of solar cells arranged on the insulating layer with gaps therebetween;
An interconnector for connecting the solar cells;
An exposed cover glass that is laminated on the solar cell and the surface does not include a conductive layer;
A high resistance conductive adhesive filled in the gap so as to contact the end face of the cover glass, the solar battery cell, the interconnector and the insulating layer ,
The solar cell panel, wherein the high-resistance conductive adhesive does not contact a corner formed by the surface and end face of the cover glass . An insulating layer as a support base;
A plurality of solar cells arranged on the insulating layer with gaps therebetween;
An interconnector for connecting the solar cells;
An exposed cover glass that is laminated on the solar cell and the surface does not include a conductive layer;
A high resistance conductive adhesive filled in the gap so as to contact the end face of the cover glass, the solar battery cell, the interconnector and the insulating layer ,
It said high resistance conductive adhesive, the end surface of the cover glass, the solar cell and the applied to an end face of the solar cell panel so as to contact the insulating layer solar cell panel according to claim Rukoto. The solar cell panel according to claim 1 or 2 , wherein a contact area of the cover glass end face with the high-resistance conductive adhesive is wider than an exposed area of the cover glass end face.   The solar cell panel according to any one of claims 1 to 3, wherein a part of the interconnector protrudes from a surface of the high-resistance conductive adhesive.   The high-resistance conductive adhesive is applied to an end face of the solar battery panel so as to contact the end face of the cover glass, the solar battery cell, and the insulating layer. Solar panel. An insulating layer as a support base;
A plurality of solar cells arranged on the insulating layer with gaps therebetween;
An interconnector for connecting the solar cells;
Covered with a cover glass laminated on the solar battery cell is a solar panel,
A surface of the cover glass is exposed without a conductive layer, and a high-resistance conductive adhesive that contacts the end surface of the cover glass, the solar battery cell, the interconnector, and the insulating layer is formed in the gap. The charge charged on the surface of the cover glass is discharged at the contact portion between the end surface of the cover glass and the high-resistance conductive adhesive, and on the surface of the cover glass ,
A method for suppressing charging of a solar cell panel, wherein the high-resistance conductive adhesive is not brought into contact with a corner formed by a surface and an end surface of the cover glass . An insulating layer as a support base;
A plurality of solar cells arranged on the insulating layer with gaps therebetween;
An interconnector for connecting the solar cells;
Covered with a cover glass laminated on the solar battery cell is a solar panel,
A surface of the cover glass is exposed without a conductive layer, and a high-resistance conductive adhesive that contacts the end surface of the cover glass, the solar battery cell, the interconnector, and the insulating layer is formed in the gap. The charge charged on the surface of the cover glass is discharged at the contact portion between the end surface of the cover glass and the high-resistance conductive adhesive, and on the surface of the cover glass ,
The method for suppressing charging of a solar battery panel , comprising applying the high-resistance conductive adhesive to an end face of a solar battery panel so as to be in contact with an end face of the cover glass, the solar battery cell, and the insulating layer . It has a solar panel that generates electricity with sunlight,
The solar cell panel is
An insulating layer as a support base;
A plurality of solar cells arranged on the insulating layer with gaps therebetween;
An interconnector for connecting the solar cells;
An exposed cover glass that is laminated on the solar cell and the surface does not include a conductive layer;
A high resistance conductive adhesive filled in the gap so as to be in contact with an end face of the cover glass, the solar battery cell, the interconnector, and the insulating layer. Power generation device. The solar power generation device for artificial satellite mounting according to claim 8, wherein the high-resistance conductive adhesive does not contact a corner formed by the surface and the end surface of the cover glass.

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