JPH0442945Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a solar cell panel, and specifically relates to a solar cell panel structure having a heat dissipation structure.

Devices using solar cells have come to be applied in various fields from the aspect of energy saving. In order to increase the efficiency of solar energy use, improvements and innovations have been made to the structure of solar panels. In the structure of a solar cell panel, when sunlight enters a solar cell, the energy of the light that does not contribute to photoelectric conversion becomes heat, increasing the temperature of the solar cell element and reducing the photoelectric conversion efficiency. Therefore, in order to prevent the temperature of the element from rising, a structure has been conventionally adopted in which heat is radiated using an aluminum plate or the like.

A conventional solar cell panel had a structure as shown in FIGS. 1A and 1B. That is, in FIG. 1A, a solar cell panel 1 is constructed by placing a wired solar cell element 3 in a glass 2 with a frame 8, filling it with a filler 4 such as silicone resin, deaerating it, and curing it by heating. It is made by applying a type of adhesive and pasting a protective sheet 5 such as polyvinyl fluoride. However, since the silicone resin in such a solar cell panel 1 is expensive, the panel itself becomes expensive. In addition, the manufacturing process was labor-intensive, and the panels had poor heat dissipation and overlapped panels.

In addition, in the solar cell panel 1' shown in Fig. 1B, a sheet-like thermoplastic resin 6 such as EVA (ethylene vinyl acetate) or PVB (polyvinyl petral) with a thickness of about 0.4 mm is placed on the glass 2', and then wiring A sheet of thermoplastic resin 6' similar to 6 is placed on top of the solar cell element 3, and finally a sandwich sheet 7 of a PVF (polyvinyl vinyl) film containing an aluminum sheet for moisture proofing is placed. Approximately
Apply vacuum heating to 110℃ and pressurize it to form a panel.
It is manufactured by setting a frame 8' with a sealant. Although this solar cell panel 1' requires fewer man-hours to manufacture and is cheaper in material cost than the solar cell panel shown in FIG. 1A, its heat dissipation and superimposition have not been improved.

The purpose of the present invention is to provide a heat dissipation structure for a solar cell panel that improves the above-mentioned drawbacks, and in particular, to improve the heat dissipation performance of the solar cell panel shown in FIG. 1B. This prevents the output from decreasing due to temperature rise.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows an embodiment of the structure of a solar cell panel according to the present invention. 13 in Figure 2
is a transparent PVF (polyvinyl fluoride) film approximately 100μ thick that is placed on the light-receiving surface of the solar panel. 14 is a sheet-like thermoplastic resin such as EVA (ethylene vinyl acetate), PVB (polyvinyl butyral), or other acrylic type, and a solar cell element 15 is housed in between. Then, a honeycomb structure 9 described below is provided below these,
It is set as a solar cell panel by a frame 17 via a sealing material 16. The frame material used is aluminum, stainless steel, or neoprene rubber frames.

The honeycomb structure 9, which is a characteristic part of the present invention, is
An aluminum plate 10 with a thickness of about 0.4 mm whose surface has been insulated coated, an aluminum honeycomb core 11 with a foil thickness of 0.025 mm, and a punched aluminum plate 12 are joined to form a sandwich structure using a structural adhesive. Consists of. Although the aluminum plate 12 is punched to improve air permeability, a sufficient heat dissipation effect can be obtained even with an aluminum plate without punching due to the honeycomb structure.

FIG. 3 is an exploded perspective view of the solar cell panel according to the present invention, and the manufacturing process of the solar cell panel according to the present invention will be explained according to this diagram. First, as described above, the aluminum plate 10, the aluminum core 11, and the punched A sheet-like thermoplastic resin such as EVA or PVA is placed on the honeycomb structure 9 consisting of an aluminum plate 12 , and then a pre-wired solar cell element 15 is placed on top of the honeycomb structure 9 .
Finally, a weather-resistant transparent PVF film 13 is placed on the film, and then the film is set in a laminating device.

Next, after vacuum heating, transparent PVF film 1
Pressure is applied from side 3 in a vacuum to form a panel.

FIG. 4A is a cross-sectional view showing how the panel is attached to the frame. A sealing material 16 is applied around the entire side surface of the panel obtained above, and a frame 17 is inserted and heated to obtain the solar cell panel of the present invention shown in FIG. In this case, sealant 1
6 uses EPDM (ethylene propylene rubber) or the like in a sheet form.

Figure 4B shows another method for attaching the panel to the frame, in which the frame 17 is coated with a fluid sealant 16' such as silicone rubber or butyl rubber in advance as shown in the figure, and then the panel is attached. You can also make it more crowded.

The present invention can provide the same heat dissipation effect even when glass or plastic is used instead of PVF film.

Since the present invention is configured as described above, by having a honeycomb structure on the back side of the panel, the surface area of the heat dissipation surface increases and the amount of heat dissipation is greatly increased, so the output decreases due to the temperature increase of the solar cell element. It has the effect of significantly improving the

Furthermore, by using a transparent PVF film on the light-receiving surface instead of conventional glass or plastic, the transmission loss of light can be reduced, making it possible to obtain a highly efficient solar cell panel and significantly reducing the weight of the panel. This is preferable in this respect. Even when using a PVF film, the rigidity of the panel is sufficiently guaranteed by the honeycomb structure, making it possible to obtain a panel with a lightweight and rigid structure. Reducing the weight has great significance in further expanding the uses of solar panels as power supplies, and the ability to reduce the weight of solar panels with the present invention is a significant effect.

Furthermore, according to the present invention, the honeycomb structure significantly increases the rigidity per unit weight, increasing the rigidity of the panel, making it possible to manufacture large solar panels, improving wind pressure resistance, and increasing the rigidity of the panel. It is also quite possible to attach it to

[Brief explanation of the drawing]

1A and 1B show the structure of a conventional solar cell panel, FIG. 2 is a sectional view showing an example of the structure of a solar cell panel according to the present invention, and FIG. 3 is a diagram showing the structure of a solar cell panel according to the present invention. FIG. 4 is an exploded perspective view of the battery panel and a sectional view showing a method of attaching the frame. 1, 1'... Solar cell panel, 2, 2'... Glass, 9... Honeycomb structure, 11... Aluminum honeycomb core, 10, 12... Aluminum plate, 13... Transparent PVF film, 14... Sheet-shaped thermoplastic resin, 15... Solar cell element, 16... Sealing material, 17... Frame.

Claims (1)

[Scope of utility model registration request] A plurality of solar cell elements are electrically connected and arranged in a thermoplastic resin, and the surface of the thermoplastic resin on the light-receiving side of the solar cell element is covered with a transparent material made of polyvinyl fluoride, A flat metal material, a honeycomb core material, on the back side of the solar cell element,
and a structure of a solar cell panel formed by sequentially arranging flat metal members each having a large number of through holes and fixing the entire periphery with a frame member.