JPH0556672B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a solar cell module that is attached to a roof or the like to exchange solar energy into electrical energy.

(Conventional technology) A solar cell module consists of a large number of solar cells.
A cell layer is sandwiched between interlayer films such as PVB (polyvinyl butyral) or EVA (ethylene vinyl acetate), a cover glass is layered on top of this cell layer, a resin plate is layered under the cell layer, and these are assembled into an aluminum frame. It is generally known that the structure is held by

However, in such a structure, the strength of the solar cell module depends solely on the strength of the cover glass and resin plate, and it is difficult to obtain sufficient strength and easily bends. In order to achieve this, the area of the solar cell module itself must be reduced, and as a result, in order to secure the required amount of power generation, a large number of solar cell modules must be used, which is inconvenient to handle.

Therefore, in order to improve the strength of the solar cell module and make it possible to increase its area, the technology shown in Japanese Utility Model Application No. 111053/1983 or Application No. 171200/1987 has been proposed. That is, in the former case, as shown in FIG. 8, a large number of solar cells 104...
05, and a honeycomb 113 is placed at the bottom of the solar cell panel with a cover glass 103 placed thereon.
... is provided with a back-up layer whose upper and lower sides are closed with plate materials 108 and 109. On the other hand, in the latter case, as shown in Fig. 9, a back-up layer is provided at the bottom of the solar panel that protrudes in the direction perpendicular to the panel surface. Rib-formed steel plate 13 so that rib portions 130 are in contact with the outside air
1 to provide a backup layer.

(Problems to be solved by the invention) However, in the above-mentioned conventional technology,
In the former case, the upper and lower surfaces of the honeycomb are closed with plate materials, so the backup layer has high heat insulation properties. Therefore, solar cell modules that are used while being exposed to sunlight cannot efficiently dissipate the heat generated in the solar cell panel, which causes the temperature of the solar cell to rise and the light energy of the solar cell to decrease. The efficiency of converting energy into electrical energy decreases. On the other hand, in the latter case, the back-up layer has excellent heat dissipation properties and can efficiently dissipate the heat generated in the solar cell panel, but on the other hand, the rib-formed steel plate makes the solar cell module heavy and Handling becomes inconvenient.

Therefore, the present invention has been made to solve the above-mentioned problems, and its purpose is to
To provide a solar cell module that is lightweight and has excellent conversion efficiency from light energy to electrical energy.

(Means and effects for solving the problems) In order to solve the above problems, the present invention provides a solar cell module 1 comprising a panel 7 constituting a solar cell and a back-up layer 10 of a honeycomb structure. is a cell layer 6 that holds the cover glass 3 and the solar cell 4 apart between the intermediate film 5;
and a top metal plate 8, the backup layer 10 is joined to the top metal plate 8 by an aluminum frame 2, and a heat pipe 14 is provided in at least the honeycomb core 13 corresponding to the position of the solar cell 4. Since the heat pipes 14 are arranged so that one side is in contact with the top metal plate 8 and the other side is in contact with the bottom metal plate 9, the temperature of the solar cells 4 provided inside the panel 7 increases. is suppressed, and the conversion of light energy into electrical energy by the solar cells 4 is efficiently performed.

(Example) Examples of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a cross-sectional view of a solar cell module 1 according to the present invention, in which a cover glass 3, a plurality of solar cells 4 . It is constructed by laminating a panel 7 consisting of cell layers 6 which are held apart from each other in between, and a back-up layer 10 whose upper bottom surfaces 8a and 9a are sandwiched between a top steel plate 8 and a bottom steel plate 9, respectively, and an aluminum frame. 2 and these panels 7
A watertight seal 11 made of silicone resin or the like is provided at the contact portion with the backup layer 10.

FIG. 2 is a cross-sectional view taken along the line of FIG. 1, and is a cross-sectional view of the backup layer 10. The back-up layer 10 has a honeycomb core 13 having holes 13a having a length substantially equal to the thickness in its thickness direction.
and a heat pipe 14 provided to be inserted into the hole 13a.

FIG. 3 is a detailed view of part A in FIG. 1, and is a diagram illustrating the heat pipe 14 and the heat radiation phenomenon caused by the heat pipe 14. The heat pipe 14 includes a cylindrical container 15 made of a material with high thermal conductivity such as metal that is inserted into the hole 13a of the honeycomb core 13, and a porous hole lined on the inner peripheral surface of the cylindrical container 15 that generates a capillary pumping force. It consists of a wick 16 with a solid structure and a working fluid that fills the pores of the wick. now,
When the solar cell module 1 provided with such a heat pipe 14 is exposed to sunlight, the panel 7 is heated, and this heat causes one end 1 of the heat pipe 14 to
The temperature of the evaporation section 4a increases. Then, the working fluid in the inner wall pores evaporates, becomes a vapor flow along with the latent heat of vaporization, and passes through the center of the container 15 toward the condensing section at the other end 14b. This condensing part 14b is on the back side opposite to the panel 7 and has a lower temperature than the evaporating part 14a, so the vapor inside is cooled and condensed, becomes a liquid again, and is stored in the Wick hole. This stored working fluid returns to the evaporation section 14a through the wick cavity by the capillary pumping force of the wick 16. This process is then repeated continuously, and the working fluid transports heat in the form of latent heat from the evaporating section 14a to the condensing section 14b. In this way, the heat generated by the panel 7 is efficiently radiated through the peat pipe 14 from the steel plate 9 on the back surface (bottom surface) of the backup layer 10, and the temperature rise of the solar cells 4 in the panel 7 can be suppressed.

As described above, according to this embodiment, the backup layer 10 of the solar cell module 1 is made of the honeycomb core 13, and the heat pipes 14 are provided in the honeycomb core 13. It is possible to provide a solar cell module that can prevent the temperature of the battery cells 4 from rising and can efficiently convert light energy into electrical energy.

Note that the present invention is not limited to the examples,
For example, the honeycomb core of the backup layer may be a roll core 20 as shown in FIG.
In addition, in the embodiment, the heat pipe provided to be inserted into the hole of the honeycomb core is directly lined with a heat pipe 16 on the surface of the honeycomb core 13 or roll core (not shown) as shown in FIG.
The honeycomb core 13 or the roll core itself may act as a container for the heat pipe. Furthermore, as shown in FIGS. The face plates 8, 9 and the aluminum frame 2 may constitute a container having a closed space.

(Effects of the Invention) As is clear from the above explanation, according to the present invention,
It is large and lightweight, and by arranging the heat pipe so that one side contacts the top metal plate and the other side contacts the bottom metal plate, the heat pipe is placed in a state where heat conduction is good. It is possible to provide a solar cell module that can effectively prevent temperature rise in solar cells and efficiently convert light energy into electrical energy.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a solar cell module according to the present invention, FIG. 2 is a sectional view taken along the line shown in FIG.
The figure is a detailed view of part A in Figure 1, Figures 4 to 7 are views showing another embodiment, Figures 4 to 6 are cross-sectional views of the backup layer, and Figure 7 corresponds to Figure 6. The cross-sectional views of the solar cell module shown in FIGS. 8 and 9 show conventional examples. And in the drawing, 1... solar cell module, 4
. . . solar cell, 7 . . . panel, 14 . . . heat pipe.

Claims (1)

[Claims] 1. A solar cell module comprising a panel constituting a solar cell and a backup layer of a honeycomb structure, wherein the panel comprises a cover glass and a cell layer that holds the solar cells spaced between interlayer films, and a top metal plate, The backup layer is joined to the upper metal plate by an aluminum frame, and a heat pipe is provided in the honeycomb core at least corresponding to the position of the solar cell, and one side of the heat pipe is connected to the upper metal plate and the other side is connected to the upper metal plate. A solar cell module characterized in that each solar cell module is arranged so as to be in contact with a bottom metal plate.