Conductive adhesive, a solar back passivation battery, a stacked tile battery string and a manufacturing method thereof

Abstract

The invention relates to a conductive adhesive, a solar back passivation battery, a stacked tile battery string and a manufacturing method thereof, belonging to the field of solar photovoltaic cells.Conductive adhesives are mainly composed of conductive particles, resins, solvents and optional additives. The resin body comprises one or more of a saturated linear polyester or copolyester having athermoplastic and a molecular weight of 20,000 to 80,000 Mw, or a phenoxy resin. A conductive adhesive film / tape is formed by curing the conductive adhesive film / tape with a volatile solvent heated below 220 DEG C, and the adhesive film can obtain adhesion when heated and pressurized and can adhere two interfaces and conduct electricity. A main gate electrode is fabricated on that aluminum back field surface of the back passivation cell sheet without breaking the passivation lay, thereby improving the conversion efficiency of the cell sheet. The main gate electrode has strong adhesion to the high-temperature sintered aluminum film, and is used for improving the structure of the solar cell sheet. The application of the above characteristics of conductive adhesive can simplify the fabrication of tiled solar cell strings-no additional use of conventional conductive adhesive is required.

Description

technical field [0001] The invention relates to the field of solar photovoltaic cells, in particular to a conductive adhesive, a solar back passivation cell, a shingled cell string and a manufacturing method thereof. Background technique [0002] Solar photovoltaic power generation is gradually becoming the main form of power generation in traditional alternative energy sources. With the reduction of government subsidies for solar power generation, it is imperative to reduce power generation costs. The solar energy industry has continuously improved the photoelectric conversion efficiency of cells and modules through technological innovation, especially the rear passivation cells that have appeared in recent years and entered mass production, including PERC, PERT, PERL, etc., which have increased the cell efficiency by at least 1.5%. The shingled module technology can place more battery units on the same area of ​​the module by reducing the blank area, and at the same time r...

AI Technical Summary

Problems solved by technology

The problem with this process is that it needs to add a step of printing conductive glue on the component side, which leads to increased costs, reduced production capacity and yield, and is troubled by patents.

[0007] No effective solution has been proposed for the above-mentioned problems in the manufacture of shingled components

[0008] At the same time, no one has proposed an integrated solution to the problems of the above-mentioned cells and components, resulting in the inability to combine high-efficiency cell technology and high-efficiency component technology with a simple and effective process

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