Transparent flexible conductive core board for back-contact large-size battery assembly and preparation method thereof

Abstract

The invention relates to a transparent flexible conductive core board for a back-contact large-size battery assembly and a preparation method thereof, and belongs to the technical field of photovoltaic equipment. The transparent flexible conductive core board includes transparent conductive oxide adhered on a flexible polymer film substrate. The beneficial effects of the transparent flexible conductive core board are as follows: the transparent flexible conductive core board is richer in raw material, so that assembly cost can be greatly reduced; the transparent flexible conductive core boardcan be used for conventional assemblies, flexible assemblies and double-sided assemblies, so that the application limitation of metal conductive circuit core boards on back-contact batteries can be broken through, and wide application ranges can be achieved; the problems of the oxidation of the metal conductive circuit core boards can be avoided, the maintenance and storage costs of raw materialsand products can be reduced during storage and usage, and the reliability of the assembly can be enhanced; and less pollution to environments can be achieved, and the transparent flexible conductive core board is low in production energy consumption and larger in size, so that using requirements of larger photovoltaic assemblies can be met.

Description

technical field [0001] The invention relates to a transparent and flexible conductive core plate of a back-contact large-size battery assembly and a preparation method thereof, belonging to the technical field of photovoltaic equipment. Background technique [0002] Back contact solar cells and components can obtain higher power and reliability due to their unique structural design. In the current application of module technology, the size of the mainstream back-contact solar cell is 156.75*156.75mm and 158.75*158.75mm. Using P-type silicon single crystal combined with PERC and black silicon texturing technology, the energy conversion efficiency of the cell can reach It can reach 23%, and can guarantee a 30-year power generation life, which can make it have a lower cost per unit of electricity than conventional grid-wire components. But in terms of its power cost, there is still potential for further reduction. The use of cells with a larger size such as 200*200mm can redu...

AI Technical Summary

Problems solved by technology

In the current back contact battery components, the mainstream conductive circuit core board materials are copper foil and copper aluminum foil, which have excellent electrical conductivity but also have high cost, resulting in the back contact battery relying on the metal conductive circuit core board and cannot The development of double-sided back-contact battery modules limits the scope of application

At present, the main production methods of transparent conductive films based on metal oxides are chemical vapor deposition, magnetron sputtering coating, evaporation, etc., which have the disadvantages of complex technology, high energy consumption and low yield.

Moreover, due to technical and cost constraints, it is impossible to prepare large-sized flexible transparent conductive films, and it is difficult to apply to back-contact large-scale solar cell modules.

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