A reflective film material for photovoltaic modules

Abstract

The invention discloses a reflecting film material for a photovoltaic assembly. The reflecting film material is prepared by the following steps: step one, adding polyethylene glycol terephthalate and polysilazane into a low-molecular solvent and stirring the mixed solution for 2 to 4 hours; step two, adding a coupling reagent, an initiator, and a catalyst into the mixed solvent, carrying out sealing and shielding-gas pressurized reaction for 2 to 5 hours, thereby obtaining a reaction solution; step three, adding a metallic packing material, organic titanium salt, and a dispersing agent into the reaction solution and stirring the mixed solution uniformly, and then carrying out high-temperature methane backflow aeration reaction for 3 to 6 hours; step four, after natural cooling, carrying out low-temperature aging on the processed reaction solution for 5 to 8 hours; step five, adding carbene into the processed reaction solution, carrying out low-temperature stirring, and then carrying out aeration dispersion reaction; step six, lifting and coating a precursor film-plating solution on a base material and then carrying out high-pressure and high-temperature drying for 3 to 6 hours; and step seven, placing the processed base material into boron trichloride under gas shielding, carrying out temperature-rising high-pressure reaction and thus obtaining a reflecting film material after natural cooling. Materials used by the reflecting film material are ones that have been applied widely by conventional assemblies, so that the manufacturing cost is low and the hidden danger on long-term stability of the assembly can be eliminated. Meanwhile, the output power of the solar cell assembly can be improved obviously.

Description

technical field [0001] The invention belongs to the technical field of solar energy, and in particular relates to a light-reflecting film material used for a photovoltaic module. Background technique [0002] In order to achieve the purpose of outputting the current generated by the photovoltaic cell to the assembly, it is necessary to weld different numbers of ribbons on the surface of the battery sheet, and the ribbons and the main grid on the surface of the battery sheet form a good circuit contact. The current generated by the photovoltaic cells flows through the grid lines on the surface of the battery to the welding strips, and then flows along the welding strips to the outside of the module to drive the load. [0003] In practical applications, in order to reduce the consumption of silver paste, the busbar on the surface of the solar cell can be a discontinuous dot-shaped busbar. This kind of busbar actually increases the light-receiving area of ​​the cell, but when p...

AI Technical Summary

Problems solved by technology

However, in actual production, it is more complicated to press the zigzag texture directly on the PET substrate by hot pressing, and the product quality rate is not high, which restricts the further reduction of the cost of the reflective tape

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