Production method of clean and pollution-free supersoft tin-plated solder strip

Abstract

The invention relates to a metal material surface coating technology, in particular to a production method which is used for producing a clean and pollution-free supersoft tin-plated solder strip and is low in production flow, low in yield strength of a produced solder strip and good in surface quality. The production method comprises the following steps of: slitting a hard state copper strip into rolls, putting the rolls on a loading tray, and enabling the copper strip to pass through a loading mechanism, a tension detection mechanism, an activating and annealing furnace, a tin plating system, an S roller driving component, a tin beading detecting component and a collecting system in sequence, wherein the activating and annealing furnace comprises an obliquely arranged annealing furnace body, an annealing furnace tube which is used for penetrating through a solder strip is arranged in the annealing furnace body along the conveying direction of the solder strip, two ends of the annealing furnace tube extend out of the annealing furnace body, the tube wall of the outlet end of the annealing furnace tube, which extends out of the annealing furnace body, is provided with an activating agent feeding hole, the outlet end of the annealing furnace tube extends to the inside of tin liquor of a tin furnace, an ignition point is formed at the inlet end above the annealing furnace tube, a sink roller is arranged below the liquid surface of the tin furnace, and the S roller driving component is arranged behind a cooling component and is used for controlling the discharging speed of the solder strip.

Description

technical field [0001] The invention relates to a metal material surface coating technology, in particular to a production method for a clean supersoft tin-coated solder strip used for producing solar cells. Background technique [0002] Tin-coated ribbon is one of the key devices in the production of solar cell modules, and is used for the connection between crystalline silicon solar cells. As the thickness of crystalline silicon solar cells becomes thinner and thinner, extremely high requirements are placed on the mechanical properties of tin-coated ribbons. It is required that the specified non-proportional elongation strength Rp0.2 of the tinned solder strip be as small as possible. At present, the specified non-proportional elongation strength Rp0.2 of tin-coated solder strips in the market is generally above 60MPa. In order to reduce cracks in the welding process of crystalline silicon solar cells, it is required to produce a tin-coated solder strip with a specified ...

AI Technical Summary

Problems solved by technology

[0005] 1) The production system process is long;

[0006] 2) Since strong acids such as hydrochloric acid and sulfuric acid are generally used for pickling, there are environmental hazards;

[0007] 3) It needs to be coated with flux, which is easy to remain and affects the quality of the welding strip;

[0009] 5) Yield strength is not easy to control

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