Composite conductive rear panel of solar cell assembly and preparation and usage methods thereof

Abstract

The invention relates to a composite conductive rear panel of a solar cell assembly and preparation and usage methods thereof. The composite conductive rear panel comprises an outer polymer layer, a conductive metal foil, a dielectric layer and an adhesive-sandwiched film which are sequentially compounded, a corresponding protruded structure is arranged on the conductive metal foil, a composite conductive resin layer is printed on the protruded structure of the conductive metal foil by using a laminating transfer print method, the dielectric layer and the adhesive-sandwiched film are compounded and formed at one time by using a heated offset roller before being compounded with the conductive metal foil, the electrode of the battery is placed on the composite conductive rear panel of the solar cell assembly and aligned to the composite conductive resin layer, then the adhesive-sandwiched film and the panel are laminated on the battery to form a laminating part, and lamination is performed to obtain an assembly. According to the invention, the punching and alignment procedures and alignment and dispensing steps of the single adhesive-sandwiched film structure can be reduced, the encapsulation technique of a back contact type battery can be greatly simplified, and the productivity of the back contact type battery assembly can be improved.

Description

technical field [0001] The invention relates to a composite conductive back plate of a solar battery module and a method for preparing and using the same. Background technique [0002] The cross-sectional view of the conductive backsheet of a traditional back-contact battery is shown in figure 1 As shown, the conductive backplane is composed of an outer polymer layer 1 , a middle conductive metal foil 2 , an inner dielectric layer 3 and an electrode connection part 4 . The outer polymer layer 1 needs to have dielectric properties, barrier properties, and environmental durability, and materials with a TPT structure and a composite backsheet structure such as an outer layer of PVF and an inner layer of PET can be used. The conductive metal foil 2 can use metals such as copper or aluminum with low resistivity as the base material. The function of the internal dielectric layer 3 is to prevent short circuit on the back side. The electrode connection part 4 is usually an Ag lay...

AI Technical Summary

Problems solved by technology

The component process of the back contact cell is relatively complicated, which increases the cost of the equipment and restricts the industrialization of this technology

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