CZ305106B6 - Process for producing 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

Process for manufacturing a solar photovoltaic module

Technical field

The invention relates to independent power supplies 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 panes by means of a sealing filler of inorganic material formed at a temperature of 380 to 480 ° C for 30 minutes is disclosed in WO 03038911, CN 1809933. The advantage of such constructions is the absence of an organic polymeric fill, limiting the lifetime of the efficient operation of the module due to decreasing light transmittance in the operating range of the spectrum. The drawback of this method is the use of high filler temperatures, which have a negative effect on the photovoltaic cell parameters, lack of optical contact between the photovoltaic cell working surface and the glass cover, and the presence of air humidity in the closed cavity leading to commutation elements corrosion and translucent parameters layers.

Most similar to the present invention appears to be a photovoltaic module manufacturing process in which a sealed filler of a polyisobutylene-based elastic polymeric material is used to form an enclosed space between the glass panes and the interior of the module is first purged with inert gas and then vacuumed through the openings this purpose in a thermoplastic filler as disclosed in FR 2862427 8, published May 20, 2005.

WO 2009097062 discloses a method for manufacturing a solar photovoltaic module, comprising forming the interior of the module by means of a thermoplastic material interlining interposed between the sheets using vacuum and pressure compression, wherein the internal vacuum space is strengthened by spaced panels that span the sheets across the surface. module.

SUMMARY OF THE INVENTION

The prior art improves a method of manufacturing a solar photovoltaic module comprising interconnected photovoltaic cells, a faceplate and a backsheet, and an internal vacuum space of the module formed by a thermoplastic bonding gasket interposed between the sheets and reinforced by spacers using vacuum and atmospheric pressure compression. characterized in that after filling the interior space with a low modulus gel, the structure of this gel proceeds in the temperature range from room temperature to 150 ° C.

The advantage of the solution according to the invention is that in comparison with the known processes using lamination of photovoltaic panels of EVA foils at a temperature of about 150 ° C, a laminator power is required for melting the EVA foil and subsequently cooling the panel of about 10 kW. at room temperature, an energy consumption of approximately 0.1 kW, which is 100 times less electricity consumption.

Clarification of the drawing

BRIEF DESCRIPTION OF THE DRAWINGS The invention is explained in the drawing, in which an overall view of a photovoltaic module is shown.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

On one of the sheets 2, 3 of tempered glass with a thickness of 3 mm, a polyisobutylene insert 4 with a thickness of 2.0 mm is spread, ensuring the necessary connection of the photovoltaic cells i is ensured. the spaced sections 6 of optically transparent cylindrical glass. A second sheet 3 is placed on the first glass sheet 2. The space 5 between the glass sheets is vacuum filtered and filled with an optically clear polysiloxane liquid containing, for example, dimethylmethylvinylsiloxane and diethylsiloxane groups, mixed with various cyclic and linear hydridsiloxanes, platinum catalyst and vulcanization inhibitor. . The filled module is then heated and held at 120 ° C for 10 minutes. The filler, after structuring, is a low modulus colorless gel with a refractive index of 1.406.

Example 2

On one of the sheets 2, 3 of 2.5 mm tempered glass, the polyisobutylene insert 4 is 1.5 mm thick, ensuring the interconnection of the interconnected photovoltaic cells i. The spacing between the photovoltaic cells is spaced apart on the sheet by an optically transparent adhesive. 6-spherical shape. A second sheet 3 is placed on the surface of the first glass sheet 3. The cavity between the glass sheets is aspirated and filled with an optically clear polysiloxane liquid containing, for example, dimethylmethylvinylsiloxane and diethylsiloxane groups, mixed with various cyclic and linear hydridsiloxanes, platinum catalyst and vulcanization inhibitor. The module thus filled is exposed to room temperature for 6 hours. The filling after structuring is a low-modulus gel with a penetration indicator from 190 to 240 specific units and with a volatile matter content of max. 2%.

PATENT CLAIMS

Claims (1)

A method of manufacturing a solar photovoltaic module 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 and reinforced by spacers, using vacuum and atmospheric pressure compression; characterized in that after filling the interior space with a low-modulus gel, the structuring of the gel takes place in a temperature range from room temperature to 150 ° C.