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Soldering flux for confluence strap of solar cell module and preparation method of soldering flux

A solar cell and solder technology, applied in welding equipment, welding/cutting media/materials, welding media, etc., can solve problems that affect the efficacy of components, and achieve the effects of improving solderability, increasing peel strength, and reducing the melting point of alloys

Inactive Publication Date: 2015-07-29
TAICANG JUREN PV MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the design service life of solar modules is mostly about 25 years, and the modules are usually installed outdoors, and they have to withstand temperature changes of tens of degrees Celsius every day. However, the base material of busbars on the market is mostly pure copper, and the expansion coefficient of copper is about silicon ( As long as there is a temperature change, both the ribbon and the battery will be stressed, so the quality of the bus belt directly affects the efficacy of the module

Method used

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  • Soldering flux for confluence strap of solar cell module and preparation method of soldering flux

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The solder used on the busbar of the solar cell module in this embodiment is composed of the following components by weight: tin: 62wt%, bismuth: 1.0wt%, antimony: 2.0wt%, gallium: 0.03wt%, indium: 1.5 wt%, germanium: 1wt%, titanium: 0.1wt%, nickel: 0.5wt%, palladium: 0.005wt%, and the balance is lead.

[0032] The method for preparing the above-mentioned solder on the busbar of a solar cell module is as follows:

[0033] Pre-treatment: Remove oil stains and oxides on the surface of the substrate by alkali washing and acid washing;

[0034] Hot dip plating: the substrate is immersed in the molten metal solution configured by weight percentage, and the hot dip plating temperature is 240 degrees Celsius to form a coating;

[0035] Post-treatment: surface chemical treatment, tape-making, cutting and reeling.

Embodiment 2

[0037] The solder used on the busbar of the solar cell module in this embodiment is composed of the following components by weight: tin: 64wt%, bismuth: 0.01wt%, antimony: 0.01wt%, gallium: 0.015wt%, indium: 0.05 wt%, germanium: 0.005wt%, titanium: 0.005wt%, nickel: 0.05wt%, palladium: 0.1wt%, and the balance is lead.

[0038] The method for preparing the above-mentioned solder on the busbar of a solar cell module is as follows:

[0039] Pre-treatment: Remove oil stains and oxides on the surface of the substrate by alkali washing and acid washing;

[0040] Hot dip plating: the substrate is immersed in the molten metal solution configured by weight percentage, and the hot dip plating temperature is 300 degrees Celsius to form a coating;

[0041] Post-treatment: surface chemical treatment, tape-making, cutting and reeling.

Embodiment 3

[0043] The solder used on the busbar of the solar cell module in this embodiment is composed of the following components by weight: tin: 62.5wt%, bismuth: 0.5wt%, antimony: 1.0wt%, gallium: 0.025wt%, indium: 1.5wt%, germanium: 0.5wt%, titanium: 0.05wt%, nickel: 0.5wt%, palladium: 0.005wt%, and the balance is lead.

[0044] The method for preparing the above-mentioned solder on the busbar of a solar cell module is as follows:

[0045] Pre-treatment: Remove oil stains and oxides on the surface of the substrate by alkali washing and acid washing;

[0046] Hot dip plating: the substrate is immersed in the molten metal solution configured by weight percentage, and the hot dip plating temperature is 260 degrees Celsius to form a coating;

[0047] Post-treatment: surface chemical treatment, tape-making, cutting and reeling.

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Abstract

The invention relates to a soldering flux for a confluence strap of a solar cell module and a preparation method of the soldering flux. The soldering flux disclosed by the invention consists of the following components in percentage by weight: 62 to 64 percent by weight of tin, 0.01 to 1.0 percent by weight of bismuth, 0.01 to 2.0 percent by weight of antimony, 0.015 to 0.03 percent by weight of gallium, 0.05 to 1.5 percent by weight of indium, 0.005 to 1 percent by weight of germanium, 0.005 to 0.1 percent by weight of titanium, 0.05 to 0.5 percent by weight of nickel, 0.005 to 0.1 percent by weight of palladium and the balance of lead. According to the soldering flux disclosed by the invention, the weldability, corrosion resistance and the welding force of the confluence strap are improved, and the electrical resistivity and a smelting point of an alloy are reduced; meanwhile, the prepared confluence strap is uniform in texture and bright in appearance; the mutual permeability of the confluence strap and an interconnector is improved, and the peeling strength is improved.

Description

technical field [0001] The present invention relates to a kind of solder, in particular to a kind of solder used on a solar cell assembly busbar and a preparation method thereof. Background technique [0002] The solar cell module busbar is a soldering tape used to connect all the interconnecting bars of the solar cells in series. Ribbons are the key to current collection and have a large impact on the power of PV modules. In the manufacturing process of solar cell modules, the quality of the front single welding and the back string welding of the cell is very important, and the busbar is required to play a stable conduction role at the output end of the total current. At present, the designed service life of solar modules is mostly about 25 years, and the modules are usually installed outdoors and are subject to temperature changes of tens of degrees Celsius every day. Most of the busbars on the market are pure copper, and the expansion coefficient of copper is about silic...

Claims

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Application Information

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IPC IPC(8): B23K35/26B23K35/40
CPCB23K35/262B23K35/40B23K35/404B23K2101/36
Inventor 徐赞徐锦松李兵
Owner TAICANG JUREN PV MATERIAL
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