JPWO2018230031A1 - Photovoltaic panel and method of manufacturing the same - Google Patents

Abstract

A photovoltaic power generation panel using the heat generated in a photovoltaic cell to generate power with a thermoelectric conversion element to increase power is obtained, and a method of manufacturing the photovoltaic power generation panel.
The honeycomb core 5 sandwiched between the first skin material 2 and the second skin material 3, the plurality of solar cells 8 mounted on the first skin material 2 side, and the second skin material 3 side are separated by the air gap 11 The plurality of thermoelectric conversion elements 10 disposed in a dispersed manner, and the plurality of thermoelectric conversion elements 10 and the heat dissipation plate 9 provided to cover the air gap 11 are provided. In addition, the steps of producing the first skin material 2 and the second skin material 3, the steps of producing the honeycomb sandwich structure 6, the steps of mounting the solar battery cell 8 on the honeycomb sandwich structure 6, and the honeycomb sandwich structure The thermoelectric conversion element 10 is manufactured by the step of separating and arranging the thermoelectric conversion element 10 with the air gap 11 and the step of providing the heat dissipation plate 9 so as to cover the thermoelectric conversion element 10 and the air gap 11.

Description

  The present invention relates to a photovoltaic panel provided with a thermoelectric conversion element and a method of manufacturing the same.

  In recent years, the demand for high-speed, large-capacity communication utilizing satellites has been increasing, and development of communication and broadcasting satellites equipped with high-performance communication devices is in progress. In such satellites, high-performance communication equipment for increasing communication speed and capacity consumes a large amount of power, and a high-power satellite bus is required. Photovoltaic panels are mounted on the satellite bus and convert solar energy to obtain power. In order to increase the power of the satellite bus, it is necessary to increase the power generation efficiency of the solar battery cells and to improve the charge and discharge efficiency of the battery mounted on the communication device, but these have limitations. Therefore, it is important to achieve high power by combining solar power generation with solar cells and other power generation technology.

  As one of the power generation techniques, a technique of converting heat into electric power using a thermoelectric conversion element is attracting attention. The thermoelectric conversion element can obtain power by giving a temperature difference between the temperature of the element surface and the temperature of the element back surface, and the maximum power is the temperature difference between the element surface on the high temperature side and the element back surface on the low temperature side It is proportional to the square.

  Patent Document 1 discloses a technology in which a thermoelectric conversion element is embedded in a satellite structure and provided so as to be in contact with a mounted device serving as a heating element to generate electric power.

International Publication No. 2016/031667

  However, in the configuration in which the thermoelectric conversion element is embedded in the satellite structure, the heat from the mounted device is transmitted not only to the thermoelectric conversion element but also to the entire satellite structure in which the thermoelectric conversion element is embedded. As the temperature decreases, the temperature difference between the temperature on the surface of the element and the temperature on the back of the element is less likely to occur, and there is a problem that sufficient power can not be obtained.

  The present invention has been made to solve the problems as described above, and the electric power obtained by generating a sufficient temperature difference between the temperature of the element surface of the thermoelectric conversion element and the temperature of the element back surface SUMMARY OF THE INVENTION It is an object of the present invention to provide a photovoltaic panel capable of increasing the

  A photovoltaic panel according to the present invention comprises a honeycomb core sandwiched between a first skin material and a second skin material, a plurality of solar cells provided on the surface of the first skin material opposite to the honeycomb core, A plurality of thermoelectric conversion elements disposed on the opposite surface of the two skins separated by a gap on the opposite surface of the honeycomb core are in contact with the second skin of the plurality of thermoelectric conversion elements on the opposite surface, and are provided to cover the void. And a heat sink.

  In the method of manufacturing a photovoltaic panel according to the present invention, a step of forming the first skin material and the second skin material using a prepreg, and a honeycomb core provided on the second skin material via an adhesive sheet, The first skin material is provided on the honeycomb core via an adhesive sheet to form a laminate, and the laminate is covered with a bagging film, and the internal air covered with the bagging film is discharged to maintain a reduced pressure state. While pressing and heating from outside the bagging film to form a honeycomb sandwich structure, mounting a plurality of solar cells on the first skin side of the honeycomb sandwich structure, and the honeycomb sandwich structure And a step of arranging the plurality of thermoelectric conversion elements on the side of the second skin material with a gap between the plurality of thermoelectric conversion elements, and contacting the second skin material of the plurality of thermoelectric conversion elements on the opposite surface, And a step of providing a heat radiating plate so as to cover the gap.

  According to the photovoltaic power generation panel of the present invention, the heat generated in the solar battery cell is transmitted to the plurality of thermoelectric conversion elements which are separated by the air gap via the honeycomb core and dispersed, and By utilizing the temperature difference between the temperature and the temperature on the back surface of the element, part is converted to electric power and the rest is dissipated from the heat sink. The plurality of thermoelectric conversion elements can take in most of the heat generated by the solar battery cell by being thermally insulated by the air gap, and by being further distributed and disposed, the temperature of the element surface and the element back surface A sufficient temperature difference can be produced with the temperature, and the power obtained can be increased.

  Further, according to the method of manufacturing a photovoltaic panel according to the present invention, a laminate of a prepreg and a honeycomb core is formed, heated and pressed to form a honeycomb sandwich structure, and one side of this honeycomb sandwich structure is formed. The solar power generation panel is obtained by a simple process of disposing the solar battery cells on one side and dispersing and arranging the plurality of thermoelectric conversion elements separated by the air gap so as to cover the opposite surface with the heat dissipation plate. Can.

It is a perspective view which shows schematic structure of the solar panel in Embodiment 1 of this invention. It is sectional drawing which shows schematic structure of the solar panel in Embodiment 1 of this invention. It is a related figure of the filling factor of the thermoelectric conversion element of the solar energy generation panel in Embodiment 1 of this invention, the electric power generated per unit area, and the temperature difference with element front and back. It is a top view which shows arrangement | positioning of the thermoelectric conversion element on the 2nd skin material in Embodiment 1 of this invention. It is a top view which shows arrangement | positioning of the thermoelectric conversion element on the 2nd skin material in Embodiment 2 of this invention. It is sectional drawing which shows schematic structure of the solar panel in Embodiment 3 of this invention. It is explanatory drawing which shows 1 process of manufacturing the solar energy generation panel in Embodiment 4 of this invention. It is explanatory drawing which shows 1 process of manufacturing the solar energy generation panel in Embodiment 4 of this invention. It is explanatory drawing which shows 1 process of manufacturing the solar energy generation panel in Embodiment 4 of this invention. It is explanatory drawing which shows 1 process of manufacturing the solar energy generation panel in Embodiment 4 of this invention. It is explanatory drawing which shows 1 process of manufacturing the solar energy power generation panel in Embodiment 5 of this invention. It is explanatory drawing which shows 1 process of manufacturing the solar energy power generation panel in Embodiment 5 of this invention. It is sectional drawing which shows schematic structure of the solar panel in Embodiment 1 of this invention. It is sectional drawing which shows schematic structure of the solar panel in Embodiment 1 of this invention.

Hereinafter, a photovoltaic panel according to the present invention and a method of manufacturing the same will be described according to a preferred embodiment with reference to the drawings. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description.
Embodiment 1

  FIG. 1 is a perspective view showing a schematic configuration of a solar panel according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a schematic configuration of a solar panel according to the present embodiment. In FIG. 1 and FIG. 2, the photovoltaic panel 1 is a honeycomb which is sandwiched between the first skin material 2 and the second skin material 3, the first skin material 2 and the second skin material 3 and is bonded by the adhesive sheet 4. A honeycomb sandwich structure 6 having a core 5 is provided. In the honeycomb sandwich structure 6, a plurality of solar battery cells 8 are disposed on the opposite surface of the surface of the first skin material 2 to which the honeycomb core 5 is adhered, with the adhesive layer 71 interposed therebetween. Also, on the opposite surface of the surface of the second skin material 3 to which the honeycomb core 5 is adhered, the plurality of thermoelectric conversion elements 10 are separated by the air gap 11 via the adhesive layer 72 and dispersed. And the heat sink 9 is provided so that several thermoelectric conversion elements 10 and the space | gap 11 may be covered.

  Here, as the first skin material 2, the second skin material 3 and the heat dissipation plate 9, for example, a flat plate-shaped carbon fiber reinforced plastic having a thickness of 0.2 mm can be used. The honeycomb core 5 is, for example, an aggregate of hexagonal cells, and an aluminum alloy having a foil thickness of 0.02 mm, a cell width of 3/8 inch, and a height of 25.4 mm can be used. For example, an epoxy adhesive can be used as the adhesive sheet 4 for bonding the first skin material 2 and the second skin material 3 to the honeycomb core 5 respectively. Moreover, the heat sink 9 may be a film, and for example, a polyimide film having a thickness of 0.05 mm can be used.

  As the thermoelectric conversion element 10, for example, an element manufactured by KELK and having a width and width of 7 to 8 mm and a height of 1 mm can be used. The adhesive layer 71 and the adhesive layer 72 for adhering the solar battery cell 8 and the thermoelectric conversion element 10 can use a room temperature curing silicone adhesive.

  The thermoelectric conversion element 10 has an element surface 10 a and an element back surface 10 b opposite to the element surface 10 a. The element surface 10 a is bonded to the second surface material 3 which is heated by the heat transmitted from the solar battery cell 8 via the adhesive layer 72. The element back surface 10b is bonded to the heat sink 9 which is at a low temperature due to the cold air from the space via an adhesive layer 72. The thermoelectric conversion element 10 can generate power using the temperature difference between the element surface 10a on the high temperature side and the element back surface 10b on the low temperature side.

  Here, the plurality of thermoelectric conversion elements 10 are separated by the air gap 11 and distributed, and the air gap 11 is thermally insulated in vacuum. With this configuration, the heat generated in the solar battery cell 8 is transmitted to the second skin 3 via the honeycomb core 5, and most of the heat transmitted to the second skin 3 is not transmitted through the air gap 11. The heat is dissipated from the heat sink 9 through the thermoelectric conversion element 10 of FIG. Therefore, the heat from the solar battery cell 8 can be transmitted to the thermoelectric conversion element 10 without loss and recovered without waste. In addition, a sufficient temperature difference can be maintained between the element surface 10a and the element back surface 10b of the thermoelectric conversion elements 10 disposed in a dispersed manner, and the power generated by the thermoelectric conversion elements 10 can be increased.

The more the number of thermoelectric conversion elements 10, the more the power can be increased. On the other hand, since the heat of sunlight is substantially constant from 1289 W / m ² to 1421 W / m ² , when the contact area of the thermoelectric conversion element 10 with the second skin material 3 is increased, the unit when passing through the thermoelectric conversion element 10 The heat per area is reduced, and a temperature difference is less likely to occur between the temperature of the element surface 10a and the temperature of the element back surface 10b. Therefore, in order to secure a sufficient temperature difference between the temperature of element surface 10a and the temperature of element back surface 10b, the plurality of thermoelectric conversion elements 10 are appropriate relative to second skin material 3 or heat sink 9 It needs to be arranged at the filling rate. Here, the filling rate refers to the ratio of the total area of the element surface 10 a or the element back surface 10 b of the plurality of thermoelectric conversion elements 10 to the area of the second skin material 3 or the area of the heat sink 9.

  When the ratio B / A of the total area B of the element surfaces 10a of the plurality of thermoelectric conversion elements 10 to the area A of the second skin material 3 is changed using the photovoltaic panel 1 as verification of the appropriate filling rate The power generated by the plurality of thermoelectric conversion elements 10 was measured. Specifically, the photovoltaic panel 1 is installed in a vacuum vessel capable of maintaining a vacuum (for example, 0.001 Pa or less) and a low temperature, and light is incident on the solar battery cell 8 using a xenon lamp as a light source. The power of the thermoelectric conversion element 10 was measured by a DC voltage / current source monitor manufactured by Tokushu. Moreover, the temperature difference of the temperature of the element surface 10a and the temperature of the element back surface 10b was measured using the thermocouple.

  FIG. 3 shows the relationship between the power (power density) generated per unit area when the filling rate of the thermoelectric conversion element 10 is changed, and the temperature difference between the temperature of the element surface 10a and the temperature of the element back surface 10b. From FIG. 3, it was found that when the filling rate was 0.3 or less, the temperature difference increased and the power increased accordingly. It was also found that when the filling rate is 0.003 or more and 0.03 or less, the temperature difference can be further significantly increased, and the power can be increased. Furthermore, it was found that when the filling rate is 0.007 or more and 0.01 or less, the power becomes maximum.

  Therefore, the plurality of thermoelectric conversion elements 10 are separated by the air gap 11 so as to be in the range of a filling factor of more than 0 and 0.3 or less, and dispersed to arrange the temperature of the element surface 10 a and the element back surface The temperature difference between the temperature of 10b can be increased, and the generated power can be increased. Here, since the number of thermoelectric conversion elements 10 decreases when the filling rate decreases, the generated power decreases even if the temperature difference can be secured, so the filling rate of the thermoelectric conversion elements 10 is larger than 0.003 and 0.03 The following range is preferable.

  As described above, the photovoltaic panel 1 is opposite to the surface of the honeycomb core 5 provided between the first skin material 2 and the second skin material 3 and the surface of the first skin material 2 on the honeycomb core 5 side. And a plurality of thermoelectric conversion elements 10 disposed in a manner separated by a gap 11 on the surface opposite to the surface of the second skin material 3 on the side of the honeycomb core 5; By providing the heat sink 9 provided so as to cover the air gap 11 on the opposite surface of the surface of the conversion element 10 in contact with the second skin material 3, the obtained power can be increased. Therefore, even if a satellite carries the communication apparatus with large power consumption, the solar power generation panel 1 can fully compensate the electric power.

  More preferably, as shown in FIG. 4, the thermoelectric conversion element 10 is disposed at an apex where the hexagons forming the honeycomb core 5 of the honeycomb sandwich structure 6 overlap each other, that is, on the triple point. The surface of the second skin material 3 has a periodicity according to the honeycomb shape in the skin other than on the triple point of the honeycomb core 5 due to the difference of the thermal expansion coefficient between the second skin material 3 and the honeycomb core 5. Irregularities (dimples) occur. When a dimple is generated at a location where the thermoelectric conversion element 10 is disposed, bending stress acts on the thermoelectric conversion element 10, and the thermoelectric conversion element 10 is damaged. Therefore, by arranging the thermoelectric conversion element 10 in this manner, it is possible to prevent the thermoelectric conversion element 10 from being damaged by the dimples.

  Further, as shown in FIG. 13, it is more preferable that a radiation heat insulating material 18 be provided on the surface opposite to the surface on the side of the honeycomb core 5 of the second skin material 3. The radiation heat insulating material 18 is provided, for example, by being attached to the surface of the second surface material 3 opposite to the surface to which the honeycomb core 5 is attached, on which the thermoelectric conversion element 10 is not provided.

  The radiation heat insulating material 18 is provided on the second skin material 3 to prevent the heat transmitted from the solar battery cell 8 from being radiated by radiation on the surface of the second skin material 3 on which the thermoelectric conversion element 10 is not provided. be able to. That is, the heat transmitted from the solar battery cell 8 is dissipated from the heat dissipation plate 9 through the plurality of thermoelectric conversion elements 10 without being transmitted by the air gap 11 by radiation, so that the heat from the solar battery cell 8 is recovered without waste can do. The radiation heat insulating material 18 may be made of a material whose emissivity is smaller than that of the heat radiation plate 9, and for example, an aluminum foil tape manufactured by 3M can be used.

Further, as shown in FIG. 14, the second skin material 3 and the heat radiation plate 9 are more preferably provided with the high thermal conductivity sheet 19. The high thermal conductivity sheet 19 is attached to each of the surface of the second skin material 3 on which the thermoelectric conversion elements 10 are disposed and the surface of the heat sink 9 opposite to the surface on which the thermoelectric conversion elements 10 are disposed. Thereby, the heat conductivity in the surface of the 2nd skin material 3 and the heat sink 9 can be improved, and heat can be distributed to a plurality of thermoelectric conversion elements 10 distributed and arranged, respectively. The high thermal conductivity sheet 19 may be made of a material whose thermal conductivity is larger than that of the second skin material 3 and the heat dissipation plate 9, and for example, a graphite sheet manufactured by Panasonic Corporation can be used.
Second Embodiment

  A photovoltaic panel according to a second embodiment for carrying out the present invention will be described with reference to FIG. FIG. 5 is a plan view showing the arrangement of the thermoelectric conversion elements on the second skin material 3. In FIG. 5, the same reference numerals as in FIG. 1 denote the same or corresponding parts.

  While the plurality of thermoelectric conversion elements 10 are arbitrarily disposed on the second skin material 3 in the solar panel 1 of the first embodiment, in the solar panel 1 of the present embodiment, The second skin material 3 is divided into a plurality of regions 33, and in each region 33, at least one thermoelectric conversion element 10 is separated by a gap 11 and dispersed. Here, “division” means to virtually divide the area 33 without separating it.

  In the photovoltaic panel 1, sunlight is uniformly incident on the plurality of solar battery cells 8 laid in the first skin material 2 and photoelectrically converted, and the remaining heat not converted into electric power is the honeycomb core It is uniformly transmitted to the second skin material 3 through 5. In the example of FIG. 5, one thermoelectric conversion element 10 which divides the second skin material 3 into a plurality of equal areas 33 having an area a and has an element area b at the center position of the divided areas 33 is an air gap. It is separated by 11 and distributed. As a result, the heat uniformly transmitted to the second skin material 3 can be evenly distributed to the thermoelectric conversion element 10 and efficiently converted to electric power.

As described above, the temperature difference between the temperature of the element surface 10 a of the thermoelectric conversion element 10 and the temperature of the element back surface 10 b depends on the filling factor of the thermoelectric conversion element 10. The filling factor of the thermoelectric conversion element 10 with respect to the second skin material 3 is 0.02, where the area a of the second surface material 3 is 30 cm ² and the element area b of one thermoelectric conversion element 10 is 0.6 cm ^2. The power generated per unit area of 10 was 15 W / m ² .

Therefore, in the solar panel 1 according to the present embodiment, at least one thermoelectric conversion element 10 is separated by the air gap 11 and dispersedly arranged for each of the plurality of divided regions 33, thereby further efficiently. The heat from the solar battery cell 8 can be transmitted to the thermoelectric conversion element 10, and the power generated by the thermoelectric conversion element 10 can be increased. Therefore, even if the solar power generation panel 1 is equipped with a communication device with a large power consumption, its power can be sufficiently compensated.
Third Embodiment

  A photovoltaic panel according to a third embodiment of the present invention will be described with reference to FIG. In FIG. 6, the same reference numerals as in FIG. 1 denote the same or corresponding parts. The solar panel 1 according to the present embodiment has a plurality of heat dissipating plates 9 as compared with the solar cell panel using the heat dissipating plate 9 in the first embodiment. In the following, description of the same points as Embodiment 1 will be omitted, and different points will be mainly described.

  In the photovoltaic panel 1 shown in FIG. 6, a plurality of solar battery cells 8 are provided in the first skin material 2 of the honeycomb sandwich structure 6, and a plurality of thermoelectric conversions separated by the air gap 11 on the second skin material 3 side. An element 10, a flat heat dissipation plate 91, and an uneven heat dissipation plate 92 are provided.

  The uneven heat sink 92 is formed continuously in one direction with the cross section being uneven, and is provided between the second skin 3 and the flat heat sink 91. The plurality of thermoelectric conversion elements 10 each have an adhesive layer 72 between the second surface material 3 and the recess of the uneven heat sink 92, and between the convex of the uneven heat sink 92 and the flat plate 91. It is separated by the air gap 11 and distributed.

  In such a configuration, a portion of the heat is converted to electric power by the thermoelectric conversion element 10 disposed between the second skin material 3 and the concave portion of the uneven heat sink 92, and the remaining heat is further uneven. The thermoelectric conversion element 10 disposed between the convex portion of the heat sink 92 and the flat heat sink 91 can be reused and converted to electric power. As a result, the heat from the solar battery cell 8 can be used for power generation of the thermoelectric conversion element 10 without waste.

  In addition, since the heat dissipation area can be increased by using the uneven heat sink 92, a sufficient temperature difference is caused between the temperature of the element surface 10a and the temperature of the element back surface 10b to increase the obtained power. it can.

  Further, by utilizing the concave and convex portions of the uneven heat sink 92, it is possible to dispose more thermoelectric conversion elements 10 while minimizing the increase in height. Although FIG. 6 shows an example in which the thermoelectric conversion elements 10 are disposed one by one, a plurality of thermoelectric conversion elements 10 may be stacked. As a result, the number of thermoelectric conversion elements 10 separated by the air gap 11 can be further increased while minimizing the increment of the height of the photovoltaic panel 1, and the power can be increased.

  As described above, the plurality of thermoelectric conversion elements 10 are separated by the air gap 11 between the second skin material 3 and the uneven heat dissipation plate 92 and between the uneven heat dissipation plate 92 and the flat heat dissipation plate 91, respectively. By arranging them, the heat from the solar battery cell 8 can be used for power generation of the thermoelectric conversion element 10 without wasting more, and the increment of the height is minimized to arrange more thermoelectric conversion elements 10 The power generated by the solar panel 1 can be increased.

  In the present embodiment, an example is shown in which the cross section of the concavo-convex heat dissipation plate 92 has a concavo-convex shape having a bent portion of 90 degrees, but the angle of the bent portion may not be 90 degrees and has a curvature. May be

Moreover, although the example comprised with two sheets of the flat heat sink 91 and the uneven heat sink 92 was shown in this Embodiment, it is good also as three or more sheets.
Fourth Embodiment

  Next, a method of manufacturing a solar panel according to a fourth embodiment for carrying out the present invention will be described with reference to FIGS. 7 to 10. 7 to 10, the same reference numerals as in FIG. 1 denote the same or corresponding parts.

  The method of manufacturing a photovoltaic panel of Embodiment 4 includes the following steps. First, the first skin material 2 and the second skin material 3 of the photovoltaic panel 1 are manufactured. A plurality of prepregs, which are semi-cured sheets prepared by impregnating a carbon fiber with a resin, are stacked, and as a material of the first skin material 2 or the second skin material 3, a prepreg laminate 20 for the first skin material or 2 Prepare a prepreg laminate 30 for the skin material. As shown in FIG. 7, the prepreg laminate 20 for the first skin material or the prepreg laminate 30 for the second skin material is installed on the surface plate 12, covered entirely with the bagging film 13, and sealed with the sealing material 14. After sealing with the sealing material 14, the air inside the bagging film 13 is discharged by operating a pump (not shown), and the prepreg laminate 20 for the first skin material or the prepreg laminate for the second skin material Depressurize 30.

  Subsequently, the prepreg laminate 20 for the first skin material or the prepreg laminate 30 for the second skin material is installed in the autoclave, and the bagging film 13 is pressurized from the outside and heated. For example, the temperature of 120 ° C. is maintained for 3 hours under 3 atm. Thereby, the 1st skin material 2 and the 2nd skin material 3 can be produced.

  Here, the conditions for heating the prepreg laminate 20 for the first skin material and the prepreg laminate 30 for the second skin material under pressure are the prepreg laminate 20 for the first skin material and the prepreg laminate 30 for the second skin material. Depends on the type of resin that makes up the

  Next, as shown in FIG. 8, after adhering the adhesive sheet 4 on the second surface material 3, the honeycomb core 5 is disposed on the adhesive sheet 4. Subsequently, the first skin material 2 to which the adhesive sheet 4 is in close contact is placed on the honeycomb core 5 to form a laminate 15.

  Next, as shown in FIG. 9, the laminated body 15 is placed on the surface plate 12, covered entirely with the bagging film 13, and sealed with the sealing material 14. After sealing with the seal member 14, by operating a pump (not shown), the internal air covered with the bagging film 13 is discharged to put the laminate 15 in a reduced pressure state.

  Thereafter, the laminate 15 covered with the bagging film 13 is placed in an autoclave, and while maintaining the reduced pressure state, the bagging film 13 is pressurized from the outside and heated. For example, it holds at 120 ° C. for 6 hours. Thus, the honeycomb sandwich structure 6 in which the honeycomb core 5 is sandwiched between the first skin material 2 and the second skin material 3 via the adhesive sheet 4 can be manufactured.

  Next, the heat sink 9 which disperses and arranges a plurality of thermoelectric conversion elements 10 is produced. The heat dissipating plate 9 can be manufactured by stacking a plurality of prepregs in the same manner as the first skin material 2 and the second skin material 3 and subjecting to pressure reduction treatment and heating under pressure.

  For example, as shown in FIG. 10, a frame member 16 in which a plurality of grooves having a thickness similar to that of the thermoelectric conversion element 10 is formed is disposed on the heat dissipation plate 9, and the grooves of the frame member Apply a silicone adhesive. The plurality of thermoelectric conversion elements 10 are disposed on the adhesive layer 72, and after the adhesive layer 72 is applied to the upper surface of the thermoelectric conversion element 10 in the frame member 16, the frame member 16 is removed. The thermoelectric conversion elements 10 having the adhesive layer 72 applied on both sides thereof are dispersedly disposed on the heat sink 9.

  Next, the honeycomb sandwich structure 6 is horizontally placed on the heat sink 9 on which the plurality of thermoelectric conversion elements 10 are dispersed and disposed, and the plurality of thermoelectric conversion elements 10 and the honeycomb sandwich structure via the adhesive layer 72 The second skin material 3 of the body 6 is bonded so as to have a void 11. At this time, a plurality of spacers (not shown) having the same thickness as the thermoelectric conversion element 10 may be attached to the heat sink 9 at predetermined intervals so that the thermoelectric conversion element 10 is separated by the air gap 11.

  Then, a plurality of solar battery cells 8 are mounted on the first skin material 2 of the honeycomb sandwich structure 6 provided with the heat dissipation plate 9 in which the thermoelectric conversion elements 10 are disposed in a dispersed manner, to obtain the photovoltaic panel 1 be able to.

  Here, the above-described steps may be partially performed, for example, the frame member 16 is installed on the second skin material 3 of the honeycomb sandwich structure 6 to disperse the thermoelectric conversion elements 10, and then the heat dissipation plate 9 and the thermoelectric conversion element 10 may be bonded so as to have an air gap 11.

  Further, after the honeycomb sandwich structure 6 is formed, for example, the radiation heat insulating material 18 is attached to the surface of the second skin material 3 opposite to the surface on the honeycomb core 5 side where the thermoelectric conversion element 10 is not provided. You may attach and provide. Further, the high thermal conductive sheet 19 may be provided, for example, by being attached to the surface of the second skin material 3 on which the thermoelectric conversion elements 10 are disposed and the surface of the heat sink 9 on which the thermoelectric conversion elements 10 are disposed.

As described above, the method of manufacturing the photovoltaic panel 1 includes the steps of sandwiching the honeycomb core 5 with the first skin material 2 and the second skin material 3 via the adhesive sheet 4 to form the laminate 15, and in the laminate 15 Discharging the air and pressing and heating from the outside while maintaining the reduced pressure state to form the honeycomb sandwich structure 6, and mounting the plurality of solar cells 8 on the first skin material 2; The step of arranging the plurality of thermoelectric conversion elements 10 on the side of the second skin material 3 with the air gap 11 dispersed and disposed, and in contact with the second skin material 3 of the plurality of thermoelectric conversion elements 10 on the opposite surface The solar cell panel 1 can be manufactured by a simple process by providing the step of providing the heat sink 9 to the above.
Embodiment 5

  Next, a method of manufacturing a solar panel according to the fifth embodiment will be described with reference to FIGS. 11 and 12. The steps other than the step of dispersing and arranging the thermoelectric conversion elements 10 in the flat heat dissipation plate 91 and the uneven heat dissipation plate 92 are the same as in the method of manufacturing the solar power generation panel shown in the fourth embodiment and thus will be omitted.

  First, after the air in the laminated body 15 in which the honeycomb core 5 is sandwiched between the first skin material 2 and the second skin material 3 is discharged through the adhesive sheet 4 to reduce pressure, heating is performed under pressure from the outside. , And the honeycomb sandwich structure 6 are formed.

  Next, the uneven heat-radiating plate 92 in which the plurality of thermoelectric conversion elements 10 are dispersed and disposed is manufactured. As shown in FIG. 11, using a pair of molds 17 having a rectangular shape on one side, a prepreg laminate 90 for an uneven heat-radiating plate in which a plurality of prepregs are laminated is sandwiched.

  Thereafter, as shown in FIG. 12, the whole of the concavo-convex heat sink prepreg laminate 90 is covered with the bagging film 13 and sealed with the sealing material 14. After sealing with the seal member 14, by operating a pump (not shown), the internal air covered with the bagging film 13 is discharged to be in a reduced pressure state. Then, the heat dissipating plate 92 is obtained by being installed in an autoclave while maintaining the reduced pressure state, and pressurizing and heating from the outside of the bagging film 13.

  Next, a thermoelectric conversion element is disposed between the second surface material 3 and the uneven heat sink 92 and between the uneven heat sink 92 and the flat heat sink 91 via the adhesive layer 72, as shown in FIG. The solar power generation panel 1 shown to is manufactured. As in the fourth embodiment, the adhesive layer 72 is applied to both surfaces of the plurality of thermoelectric conversion elements 10 by using the frame member 16, and the adhesive layers 72 are dispersed in the plate-shaped heat dissipation plate 91. Subsequently, the uneven heat dissipation plate 92 is horizontally placed on the flat heat dissipation plate 91, and the upper surface of the thermoelectric conversion element 10 disposed on the flat heat dissipation plate 91 via the adhesive layer 72, and the uneven heat dissipation plate Bonding is carried out so as to have an air gap 11 with the 92 convex portions.

  Next, the adhesive layer 72 is applied to the concave portion of the uneven heat sink 92, the plurality of thermoelectric conversion elements 10 are dispersedly disposed, and the adhesive layer 72 is further applied to the upper surface of the thermoelectric conversion element 10. Subsequently, the honeycomb sandwich structure 6 is horizontally placed on the uneven heat dissipation plate 92, and the upper surface of the thermoelectric conversion element 10 disposed in the recess of the uneven heat dissipation plate 92 via the adhesive layer 72 and the honeycomb sandwich structure The second skin material 3 of the body 6 is bonded so as to have a void 11.

  Then, a plurality of solar battery cells 8 are mounted on the first skin material 2 of the honeycomb sandwich structure 6 provided with the flat heat dissipation plate 91 and the uneven heat dissipation plate 92 and the thermoelectric conversion elements 10 are dispersedly disposed. The solar power generation panel 1 shown in FIG. 6 can be obtained. Here, the above-described steps may be partially performed.

  As described above, the step of forming the honeycomb sandwich structure 6, the step of producing the uneven heat sink 92, and the plate-like heat sink 91, the thermoelectric conversion elements 10 are dispersedly disposed. The step of bonding so as to have the air gap 11 and the thermoelectric conversion elements 10 are dispersedly disposed in the concave portion of the uneven heat sink 92 so as to have the air gap 11 in the second surface material 3 of the honeycomb sandwich structure 6 By the step of performing and the step of mounting the solar battery cell 8 on the first skin material 2, the photovoltaic panel 1 can be manufactured in a simple process.

  In Embodiments 1 to 5, the first skin material 2, the second skin material 3, the heat dissipation plate 9, the flat heat dissipation plate 91, and the uneven heat dissipation plate 92 are exemplified by carbon fiber reinforced plastic. For example, other reinforced fiber plastics such as glass fiber reinforced plastic may be used, as long as they are composed of a combination of reinforced fiber and resin.

  Further, in the first to fifth embodiments, the case where the shape of the honeycomb core 5 is a hexagonal shape is exemplified, but any shape may be used as long as it has a polygonal shape. In addition, although an aluminum alloy is illustrated as a material of the honeycomb core 5, any material that is lightweight and strong may be used, and for example, carbon fiber reinforced plastic, foamed plastic, etc. can be used.

  In the first to fifth embodiments, the case where an epoxy adhesive is used as the adhesive sheet 4 is shown. However, any thermosetting resin may be used, and a liquid adhesive may be used.

  In the first to fifth embodiments, a room temperature curing silicone adhesive is used as the adhesive layers 71 and 72, but any thermosetting resin having a high thermal conductivity may be used, and a film adhesive is used. It is also good.

  In addition, the present invention may be combined with a plurality of constituent elements disclosed in Embodiments 1 to 5 without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 photovoltaic panel, 2 1st surface material, 3 2nd surface material, 4 adhesive sheet, 5 honeycomb core, 6 honeycomb sandwich structure, 71, 72 adhesive layer, 8 solar battery cell, 9 heat sink, 91 flat plate shape Heat sink, 92 uneven heat sink, 10 thermoelectric conversion element, 10a element surface, 10b element back surface, 11 air gap, 12 platen, 13 bagging film, 14 sealing material, 15 laminate, 16 frame members, 17 molds, 18 Radiation heat insulating material, 19 high thermal conductive sheet, 33 area, 20 prepreg laminate for first skin material, 30 prepreg laminate for second skin material, 90 prepreg laminate for uneven heat dissipation plate

A photovoltaic panel according to the present invention is a photovoltaic panel used in space, comprising a honeycomb core sandwiched between a first skin material and a second skin material, and a honeycomb core of the first skin material A plurality of solar cells provided on the opposite surface, a plurality of thermoelectric conversion elements disposed on the opposite surface of the second skin material, separated by an air gap and disposed on the surface opposite to the honeycomb core, and a second of the plurality of thermoelectric conversion elements contact with the surface opposite to the surface material, e Bei a radiating plate provided so as to cover the gap, the second skin material is divided into equal plurality of areas, for each divided area, one thermoelectric conversion The elements are spaced apart and distributed in an air gap .

Further, a method of manufacturing a photovoltaic panel according to the present invention is a method of manufacturing a photovoltaic panel used in space, which comprises the steps of forming a first skin material and a second skin material using a prepreg. Providing a honeycomb core on the second skin material via an adhesive sheet, and providing a first skin material on the honeycomb core via the adhesive sheet to form a laminate;
Covering the laminated body with a bagging film, exhausting the internal air covered with the bagging film, and applying pressure and heat from the outside of the bagging film while maintaining a reduced pressure state to form a honeycomb sandwich structure; Mounting the plurality of solar cells on the first skin side of the sandwich structure, and dispersing and distributing the plurality of thermoelectric conversion elements on the second skin side of the honeycomb sandwich structure with a gap; contact with the second skin material of a plurality of thermoelectric conversion elements on the opposite side, e Bei and providing a radiating plate so as to cover the gaps, in the step of disposing the thermoelectric conversion element, a plurality of equally second skin material It divides | segments into area | regions, and divides | segments and disperse | distributes one thermoelectric conversion element with a space | gap for every divided area | region .

A photovoltaic panel according to the present invention is a photovoltaic panel used in space, comprising a honeycomb core sandwiched between a first skin material and a second skin material, and a honeycomb core of the first skin material A plurality of solar cells provided on the opposite surface, a plurality of thermoelectric conversion elements disposed on the opposite surface of the second skin material, separated by an air gap and disposed on the surface opposite to the honeycomb core, and a second of the plurality of thermoelectric conversion elements The second skin material is divided into a plurality of equal areas, and one thermoelectric conversion element is provided in each of the divided areas. The plurality of thermoelectric conversion elements individually have an element front surface and an element back surface, and the element front surface and the element back surface are respectively adhered to the second skin material and the heat sink.

Further, a method of manufacturing a photovoltaic panel according to the present invention is a method of manufacturing a photovoltaic panel used in space, which comprises the steps of forming a first skin material and a second skin material using a prepreg. Providing a honeycomb core on the second skin material via an adhesive sheet, providing the first skin material on the honeycomb core via the adhesive sheet to form a laminate, and covering the laminate with a bagging film, Step of forming a honeycomb sandwich structure by discharging air inside the bagging film and maintaining the reduced pressure state from outside of the bagging film to form a honeycomb sandwich structure, and a first surface material of the honeycomb sandwich structure Mounting the plurality of solar cells on the side and the plurality of thermoelectric conversion elements on the second surface side of the honeycomb And a step of providing a heat dissipation plate in contact with the second skin of the plurality of thermoelectric conversion elements on the opposite surface to cover the air gap, and in the step of arranging the thermoelectric conversion elements, the second skin is equalized Divided into a plurality of areas, and one thermoelectric conversion element is provided for each divided area, and the plurality of thermoelectric conversion elements individually have an element surface and an element back surface, and the element surface and the element The back side is adhered to the second skin material and the heat sink, respectively.

Claims (7)

A honeycomb core sandwiched between the first skin material and the second skin material;
A plurality of solar cells provided on the surface of the first skin material opposite to the honeycomb core;
A plurality of thermoelectric conversion elements disposed on the surface of the second skin material opposite to the honeycomb core and separated by a gap and dispersed;
A solar panel according to any one of the preceding claims, further comprising: a heat sink that is in contact with the second skin of the plurality of thermoelectric conversion elements on the opposite surface and covers the air gap. The solar cell panel according to claim 1, wherein a radiation heat insulating material is provided on a surface of the second skin material opposite to the honeycomb core and on which the thermoelectric conversion element is not disposed. The contact area of the thermoelectric conversion element with the second skin material or the heat sink is in the range of more than 0 and 0.3 or less with respect to the area of the second skin material or the heat sink. The solar power generation panel as described in 1 or 2. The second skin material is divided into a plurality of regions, and for each of the divided regions, at least one thermoelectric conversion element is disposed separated by a gap and dispersed. The solar power generation panel as described in any one of 3. The photovoltaic panel according to claim 1 or 2, wherein the plurality of thermoelectric conversion elements are disposed on a triple point at which the apexes of hexagons of the honeycomb core overlap. The heat sink is composed of a heat sink having an uneven cross section and continuous in one direction,
It has a thermoelectric conversion element and an air gap provided in the recess of the uneven heat sink,
The solar panel according to claim 1, wherein the solar panel is covered with a flat plate-shaped heat dissipation plate via a thermoelectric conversion element provided on a convex portion of the uneven heat dissipation plate. Molding the first skin material and the second skin material using a prepreg;
Providing a honeycomb core on the second skin material via an adhesive sheet, and providing the first skin material on the honeycomb core via the adhesive sheet to form a laminate;
Covering the laminated body with a bagging film, exhausting the internal air covered with the bagging film, and applying pressure and heat from the outside of the bagging film while maintaining a reduced pressure to form a honeycomb sandwich structure When,
Mounting a plurality of solar cells on the first skin side of the honeycomb sandwich structure;
Arranging a plurality of thermoelectric conversion elements on the side of the second skin material of the honeycomb sandwich structure with a gap therebetween and dispersing them;
And a step of providing a heat sink plate so as to be in contact with the second skin member of the plurality of thermoelectric conversion elements on the opposite surface to cover the air gap.

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