CZ22596U1 - Solar photovoltaic module - Google Patents

Abstract

In the present invention, there is disclosed a process for the production of a solar photovoltaic module comprising interconnected photovoltaic elements, a front and back panes and an inner vacuumed space of the module created by means of a connecting sealing insert of thermoplastic material and disposed between the panes, wherein the production process comprises creation of the module interior by the use of vacuuming and compression by the action of atmospheric pressure. The present invention is characterized in that after the interior is filled up with a low-molecular gel, the gel structuring takes place within the temperature range from a room temperature up to 15 degC.

Description

Solar photovoltaic module

Technical field

The technical solution relates to an independent power supply using solar energy.

BACKGROUND OF THE INVENTION

Solar photovoltaic modules and methods for their production are known, similar to the method for producing hermetic glass laminates, presuming the placement of photovoltaic cells within a closed cavity formed between two glass sheets by means of a sealing inorganic substance formed at a temperature of 380 to 480 ° C for 30 minutes as disclosed in WO 03038911, CN 1809933. The advantage of such constructions is the absence of an organic polymeric fill, limiting the life of the efficient operation of the module due to decreasing light transmittance in the operating range of the spectrum. The disadvantage of this method is the use of high filler forming temperatures, which have a negative effect on the photovoltaic cell parameters, the lack of optical contact between the photovoltaic cell working surface and the glass cover, and the presence of air humidity in the closed cavity. translucent layers.

The photovoltaic module and the method of its assembly are most similar to the technical solution according to which a sealing filler made of an elastic polymeric material based on polyisobutylene is used to create a closed space between the glass panes and the inner space of the module is first purged with inert gas and then vacuumed through kept for this purpose in a thermoplastic filler as disclosed in FR 2862427 8, published May 20, 2005.

The shortcomings of this construction include:

- reducing the conversion efficiency due to the non-existent optical contact of the glass sheath and the surface of the photovoltaic cells, which leads to an increase in optical losses;

- susceptibility to structural leakage;

- the impossibility of ensuring uniformity of thickness across the module surface in the vacuuming process and hence uniformity of the optical properties of the system.

The object of the present invention is to increase the efficiency of the photovoltaic module by reducing optical losses, guaranteeing the specified geometrical parameters, uniform thickness of the module, increasing the resistance of the photovoltaic module against the leakage of the internal space of the module.

The use of the technical solution extends the module life and the stability of the initial electrical parameters over the entire service life.

The essence of the technical solution

The aforementioned result achieves the solar photovoltaic module according to the invention comprising interconnected photovoltaic cells, a faceplate and a backsheet and an internal vacuum space of the module, formed by means of a sealing gasket of thermoplastic material interposed between the sheets. The essence of the solution is that the internal vacuum space of the module is strengthened by means of spacers distributed between the panes over the module surface, and is filled with an optical substance in the form of a low-modulus polysiloxane gel.

The spaced members are preferably in the form of a sphere, hemisphere, double-convex lens or cylinder and are fixed between the panes by means of an optically transparent adhesive having a refraction coefficient close to that of glass and polysiloxane gel.

In the photovoltaic module, photovoltaic cells of monocrystalline silicon, polycrystalline silicon, or microcrystalline silicon are used as photovoltaic cells.

-1GB 22596 Ul

In another preferred embodiment, any thin-film photovoltaic cells may be used as photovoltaic cells, and any combination of the above-mentioned types of photovoltaic cells may also be used.

In the photovoltaic module, preferably one of the two panes is of weather-resistant optically clear polymeric material, optionally of inorganic hardened or reinforced glass. Clarification of the drawing

The essence of the invention is explained in the figure, which shows an overall view of the photovoltaic module.

EXAMPLES OF THE INVENTION Example 1

The solar photovoltaic module is made of sheets 2, 3 of tempered glass with a thickness of 3 mm with an insert 4 of polyisobutylene with a thickness of 2.0 mm. Interconnected photovoltaic cells 1 are located in the interior 5. In the gaps between the photovoltaic cells, spacers 6 of optically transparent hemisphere glass 6 are glued to the sheet 2, 3 using optically transparent adhesive.

The inner vacuum space 5 between the glass panes 2, 3 is filled with an optically clear polysiloxane liquid containing dimethyl methylvinyl siloxane and diethylsiloxane groups, mixed with various cyclic and linear hydridesiloxanes, a platinum catalyst and a vulcanization inhibitor. The filler after structuring is a low modulus colorless gel with a refractive index of 1.406.

Example 2

The solar photovoltaic module is made of 2.5 mm thick tempered glass panes with a 1.5 mm thick polyisobutylene insert 4. Interconnected photovoltaic cells 1 are arranged in the interior space 5. In the gaps between the photovoltaic cells, planar-convex lens-shaped spacers 6 are glued to the sheet 2, 3 by means of an optically transparent adhesive. The inner vacuum space 5 between the glass sheets 2, 3 is filled with an optically clear polysiloxane liquid containing, for example, dimethylmethylvinyl siloxane and diethylsiloxane groups, mixed with various cyclic and linear hydridesiloxanes, with a platinum catalyst and a vulcanization inhibitor. The filling after structuring is a low-modulus gel with a penetration indicator from 190 to 240 specific units and with a maximum volatile matter content of 2%.

Claims (10)

PROTECTION REQUIREMENTS A solar photovoltaic module comprising interconnected photovoltaic cells (1), a faceplate and a backsheet (2, 3) and an internal vacuum space (5) of the module, formed by means of a sealing gasket (4) of thermoplastic material disposed between the sheets (2, 3), characterized in that the internal vacuum space (5) of the module is reinforced by means of spacers (6) located between 35 panels (2, 3) over the module area and is filled with a low modulus polysiloxane gel. Solar photovoltaic module according to claim 1, characterized in that the spacer elements (6) are in the form of a sphere, a hemisphere, a double-convex lens or a cylinder. Solar photovoltaic module according to claim 1, characterized in that the spacer elements (6) are fixed between the panes by means of an optically transparent adhesive with a fracture coefficient close to 40 refraction factors of glass and polysiloxane gel. -2EN 22596 Ul Solar photovoltaic module according to claim 1, characterized in that the photovoltaic cells (1) are of single-crystal silicon. Solar photovoltaic module according to claim 1, characterized in that the photovoltaic cells (1) are of polycrystalline silicon. Solar photovoltaic module according to claim 1, characterized in that the photovoltaic cells (1) are of microcrystalline silicon. Solar photovoltaic module according to claim 1, characterized in that the photovoltaic cells (1) are arbitrary thin-film photovoltaic cells. Solar photovoltaic module according to claim 1, characterized in that the photovoltaic cells (1) are a combination of mono-, pole-, microcrystalline and amorphous silicon-based photovoltaic cells and thin-film photovoltaic cells of any type. Solar photovoltaic module according to claim 1, characterized in that one of the two panes (2, 3) is a sheet of weather-resistant optically clear polymeric material. Solar photovoltaic module according to claim 1, characterized in that one of the two 15 panes (2, 3) is of inorganic hardened or reinforced glass.