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INVENTION
Russian Federation Patent RU2284075
Solar PV MODULE AND METHOD OF MANUFACTURING
Name of the inventor: Persits Samuilovna Irina (RU); Valery Potapov (RU); Strebkov Dmitry S. (RU); Chehunina Galina
The name of the patentee: State Scientific Institution All-Russian Research Institute for Electrification of Agriculture (GNU VIESH)
Address for correspondence: 109456, Moscow, 1st Veshnyakovskaya pr-d, 2, GNU VIESH, OV Golubeva
Starting date of the patent: 2005.06.03
The invention relates to a self-contained power sources, using solar energy. The technical result of the invention is to increase the resistance of the PV module to a breach of the internal cavity sealing module, improving performance properties of the material - filler (increase adhesion of the material - filler with a glass surface), while maintaining the level and the long-term stability of the optical characteristics, but also to simplify and reduce the cost of manufacturing the module technology. The inventive solar module consists of two tightly bonded at the ends of the glass sheets, between which is placed the switched photovoltaics. These photovoltaics immersed in an optically transparent silicone fluid, which is a mixture of polysiloxane containing dimethyl or (and) dietilvinilsiloksanovye units platinum catalyst and a crosslinking agent and forming a semi-module manufacturing process gel. In the proposed method, the switched photovoltaics with current sandwiched between two panes glued together by three parties using any adhesive, after which the package is filled with the collected liquid is optically transparent, the polysiloxane is a mixture containing dimethyl or (and) dietilvinilsiloksanovye units platinum catalyst and crosslinking agent, which by heating to 50-150 ° C is converted into a low modulus gel.
DESCRIPTION OF THE INVENTION
The invention relates to a self-contained power sources, using solar energy.
In the prior art photovoltaic modules as a filler - adhesive connecting the photovoltaic surface (AF) with the front and back protective coatings, elastomers have found widespread use cold setting based on low molecular weight silicone rubber with different side groups (US Patent №4170507). Essential disadvantages of such fillers and materials as described in U.S. Patent №3957337, productivity is low due to the curing process duration, low adhesion to fillers and glass surfaces of the FP, resulting in the need for additional processing of adhesion promoters, curing heterogeneity in relatively thick layers, but also the possibility of delamination (tackiness) during long-term operation due to shrinkage phenomena.
There are options for construction of photovoltaic modules in which the filler module is optically transparent Polymethylsilicone neutral fluid (RF Patent №2205472).
The closest to the technical nature of the present invention is a patent of the Russian Federation №2130670. In this patent, a method of manufacturing solar photovoltaic module comprising photovoltaic arrangement of switched between two layers of glass bonded together on three sides at the ends by welding or gluing in glazing, heating module to 50-80 ° C, filling an optically neutral transparent liquid seal glass by welding or glueing and cooling to room temperature, and as optically transparent liquid polymethylsiloxane fluid used.
The disadvantage of the method - the prototype is the need to create significant amounts of compensation due to the almost linear dependence of the volumetric coefficient of thermal expansion of industrial brands polymethylsiloxane fluid temperature. (Sobolewski MV et al .. Oligoorganosiloksany properties, obtaining, application -.. M, Chemistry, 1985).
Sealing module manufactured in accordance with the present in the prior art method imposes severe restrictions on the selection of appropriate grades polymethylsiloxane fluids, in particular, the molecular weight and thorough cleaning of the low molecular weight impurities, the active selection of which at temperatures above 60 ° C can lead to the destruction of sealed construction .
Disadvantages solar photovoltaic module manufactured according to the method - the prototype include the fact that any breach of sealing, such as in violation of the integrity of the glass, leading to leakage of the liquid portion of the filler. This leads to disruption of the optical and thermal contact between the surfaces of glass and solar cells and hence to reduce the output electrical parameters. A similar effect results in violation of the integrity and structure on the perimeter.
In addition, placement of switched photovoltaic chains and fixing their position in the finished insulating glass, wherein the width of the gap between the panes of thickness comparable to FI seems difficult to implement in practice, especially in the manufacture of large units.
The object of the invention is to increase the resistance of the photovoltaic module to the breaking of the internal cavity sealing module, improved performance properties of the material - filler (increase adhesion of the material - the glass surface aggregate) and while maintaining the level of long term stability of optical characteristics, and a manufacturing simplification and cheapening of the technology module.
By using the present invention increases the service life of the module and the electrical stability of the output parameters during the entire lifetime.
The above result is achieved by the fact that in the solar PV modules composed of two tightly bonded at the ends of the glass sheets, between which is placed the switched photovoltaics listed photovoltaics embedded in an optically clear silicone fluid, which is a mixture of a polysiloxane containing dimethyl or (and) dietilvinilsiloksanovye links , a platinum catalyst and a crosslinking agent and forming a semi-module manufacturing process gel.
The proposed method of manufacturing solar photovoltaic module the switched photovoltaics with current sandwiched between two panes glued together by three parties using any adhesive with heat resistance of not less than 50 ° C (depending on the structuring mode), after which the assembled package is filled with an optically transparent liquid , the polysiloxane is a mixture containing dimethyl - or (and) dietilvinilsiloksanovye units a platinum catalyst and a crosslinking agent, which by heating to 50-150 ° C is converted into a low modulus gel.
The duration of the process depends on the temperature chosen. The wide range of possible starting components and a wide range of possible modes of structuring allows to obtain gels - aggregates, long-bodied in the temperature range from minus 80 to plus 260 ° C, no corrosive impurity and internal stress.
Structure formed material - filler has high adhesion to the main material of the module (photovoltaics, glass), low modulus, but is devoid of fluidity. structuring process takes place without isolation of low molecular weight products without shrinkage phenomena. Free (fourth) glass perimeter side can be sealed using any weatherable adhesive sealant - to avoid contamination free surface of the gel during operation.
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One or both of the two silicate glass, depending on the desired stiffness and linear design dimensions can be replaced with sheets (optically transparent to the working surface of the module), light-resistant plastic. As one or both of the glass sheets using a weatherable optically transparent (for the work surface module) polymeric material. As one or both of the glass sheets using an inorganic glass or reinforced glass. The essence of the invention is illustrated by the drawing, which shows a general view of the photovoltaic module. Solar photovoltaic module contains the switched photovoltaics 1, the glass sheet 2 from the working surface on which the incident solar radiation, the glass sheet 3 from the back surface of the module, optically transparent low modulus 4 gel that fills space within the module and between photoconverters and glasses. |
PV module manufacturing method is implemented as follows
On one of the sheets of glass (typically, "the rear") fix the switched photovoltaics. Cold end output beyond the glass (preferably with one hand). The glass sheet with photoconverters connected to a second sheet of glass on three sides, providing the necessary clearance and tightness. With the free hand is poured into the gap between the panes optically transparent fluid so that it fills the gaps between the photoconverters and the space between the panes and the surfaces of solar cells. Heating module is carried to the desired temperature, holding at the predetermined temperature and cooling to room temperature.
Examples of specific performance of the solar PV module and methods of its implementation.
example 1
On one of the sheets of tempered glass thickness of 3 mm using kleeperenosyaschey tape 0.05 mm thick fixed arrangement of switched necessarily photoconverter. On the perimeter of the glass on three sides is applied to double-sided sticky tape is 1.5 mm thick, performs two functions simultaneously - and spacing glass bonding. Above the double-sided tape is placed and adhered second glass. The cavity between the panes is filled with an optically transparent liquid polysiloxane containing, for example, dimethyl, methylvinylsiloxane units and dietilsiloksanovye in admixture with various linear and cyclic gidridsiloksanami and a platinum catalyst. The completed module is heated and maintained at 60 ° C for 2 hours. Filler after structuring is a low modulus colorless gel with a refractive index of 1.406.
example 2
Spacing glass made using the temporary spacers required thickness (eg, PTFE), and bonding and sealing on three sides is carried out with the help of a neutral silicone sealant with high thixotropy. The module is filled with a liquid mixture of components is heated to a temperature of 150 ° C and held for 30 minutes.
example 3
Bonding and sealing on three sides is done with glue - melt (eg, based on the polyester). The module is filled with a liquid mixture of components is heated to a temperature of 120 ° C and maintained for 1 hour.
CLAIM
1. The solar photovoltaic module consisting of a hermetically bonded at the ends of two glass sheets, between which is placed the switched photoconverters, are immersed in an optically transparent silicone fluid, wherein the optically transparent silicone fluid formed as a weakly structured gel of polysiloxane mixture comprising dimethyl ethyl, or (and) dietilvinilsiloksanovye units a platinum catalyst and a silane crosslinking agent.
2. A method of manufacturing a solar PV module comprising a compound of two glass layers on three sides at the ends by a bonding glazed placement of switched with current solar cells between layers of glass, filling the space between the panes optically neutral transparent silicone liquid modulus heating and cooling to room temperature, characterized in that the optically transparent silicone fluid, a mixture of polysiloxane containing dimethyl, ethyl, or (and) dietilvinilsiloksanovye units a platinum catalyst and a silane crosslinking agent, which by heating to a temperature of 50-150 ° C is converted into a semi-gel low modulus.
3. A method according to claim 2, characterized in that the one or both glass sheets using a weatherable optically transparent (for the work surface module) polymeric material.
4. A method according to claim 2, characterized in that the one or both of the glass sheets using an inorganic glass or reinforced glass.
print version
Publication date 03.02.2007gg
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