Preparing method for oxygen-free copper belt used for solar cell module

Abstract

The invention discloses a preparing method for an oxygen-free copper belt used for a solar cell module and belongs to the technical field of solar equipment modules. The preparing method includes the steps that firstly, a red copper sheet is cut and subjected to impurity removing, and then the red copper sheet is put into a tubular furnace to be heated so that copper can become copper steam; then the copper steam is led into a vacuum induction furnace to be condensed and then melted, and the melt is subjected to vacuum upcasting, and a non-oxygen copper bar is obtained; then the non-oxygen copper bar is subjected to operation such as extruding, annealing and impurity removing, and a blank obtained after impurity removing is obtained; then ammonium molybdate and ethyl orthosilicate serve as raw materials, are hydrolyzed and then react with ammonium hydroxide to generate sediment, polyving alcohol can be attached to the surface of the blank, and then the sediment is adsorbed under the chemical adsorption effect; and then calcination is conducted, the polyving alcohol is reduced, a layer of molybdenum silicide film is formed on the surface of the blank, and the copper belt is prevented from being oxidized. By means of the preparing method, the prepared non-oxygen copper belt used for the solar cell module is uniform in thickness and not likely to disengage, the electric conduction performance between the non-oxygen copper belt and a battery sheet is good, and the service life of the module is prolonged.

Description

technical field [0001] The invention belongs to the technical field of solar equipment components, and in particular relates to a preparation method of an oxygen-free copper strip for solar cell components. Background technique [0002] Due to the shortage of energy, human beings must develop new energy and high-efficiency energy-saving materials as soon as possible. This is a major issue that must be solved in the 21st century. As a widely distributed, inexhaustible and inexhaustible green, pollution-free and clean energy, solar energy is the preferred energy source for the sustainable development of human society. A solar cell is a device that uses the photoelectric effect to convert solar energy into electrical energy. Copper strip is the base material for making tin-coated solder strips of solar cell modules, which is used for the connection between cells of photovoltaic modules and is one of the key components of solar cells. It is required to have good thermal conduc...

AI Technical Summary

Problems solved by technology

At present, the photovoltaic cell functional component materials used in solar cells are tin alloy copper strips, and the coating alloys are mostly lead-containing tin alloys, which brings unavoidable lead pollution in the production and use of tin alloy copper strips. and poisoning problems, which is not conducive to human health and environmental protection

[0003] The tinned copper strip produced by the prior art method is before tinning because the copper strip surface pollutants and the oxide layer are not completely removed, the surface oxidation is serious, the appearance is uneven, and the thickness is uneven, so that the conductivity is poor when used after tinning, And the coating is easy to fall off; at the same time, after tin coating, not only the color of the tinned copper strip is easy to change, but also the surface of the tinned copper strip is prone to piles of tin or gaps, etc., which seriously affect the electrical performance.