Tin, lead and indium-based solder alloy for photovoltaic solder strip and preparation method thereof

A photovoltaic ribbon and alloy technology, which is applied in welding equipment, metal processing equipment, welding/cutting media/materials, etc., can solve the problems of obvious stress concentration of cells, uneven temperature changes, influence of cell strength, etc., and achieve spreading Excellent performance, good oxidation resistance, excellent wetting performance

Inactive Publication Date: 2018-09-18
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating of the photovoltaic ribbon is to realize the connection with the battery silicon (monocrystalline silicon, polycrystalline silicon, amorphous silicon), because the battery piece will undergo instantaneous cooling after brazing, so a large shrinkage deformation will occur during the cooling process , and the thermal expansion coefficient mismatch between the silicon material, the silver paste and the ribbon will cause a large stress between the ribbon and the cell, which will have a greater impact on the strength of the cell
A

Method used

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Examples

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Example Embodiment

[0022] The present invention also provides a method for preparing tin-lead-indium-based solder alloy for photovoltaic soldering tape, and the specific steps are as follows:

[0023] Step 1. Weigh each metal particle raw material: Weigh tin particles, lead particles, indium particles and gallium particles with a purity of 99.99% respectively, so that each component in the alloy meets the following conditions by mass percentage: Sn58%-63%, Pb 33%-40%, In1%-3%, Ga 0.1%-1%, the total mass percentage of the above components is 100%;

[0024] Step 2: Perform ultrasonic cleaning on each metal particle raw material weighed in Step 1, and the ultrasonic cleaning time is 20min-40min;

[0025] Step 3. Smelt the metal particle raw materials after ultrasonic cleaning in step 2 and heat to melt to obtain tin-lead-indium-gallium alloy. The smelting process uses KCl+LiCl molten salt with a mass ratio of 1.25:1. protection;

[0026] Step 3.1: Put the tin particles, lead particles and indium particles...

Example Embodiment

[0034] Example 1

[0035] A preparation method of tin-lead-indium-based solder alloy for photovoltaic ribbons, the specific steps are as follows:

[0036] Step 1. Weigh each metal particle raw material: respectively weigh tin particles, lead particles, indium particles and gallium particles with a purity of 99.99%, so that each component in the alloy meets the following conditions by mass percentage: Sn58%, Pb 40% , In 1%, Ga1%, the sum of the above component mass percentages is 100%;

[0037] Step 2: Perform ultrasonic cleaning on each metal particle raw material weighed in Step 1, and the ultrasonic cleaning time is 20 minutes;

[0038] Step 3: Smelt the metal particle raw materials after ultrasonic cleaning in step 2 and heat them to melt, and use KCl+LiCl molten salt with a mass ratio of 1.25:1 for protection during the smelting process;

[0039] Step 3.1: Put the tin particles, lead particles and indium particles after ultrasonic cleaning in step 2 into a ceramic crucible and heat...

Example Embodiment

[0043] Example 2

[0044] A preparation method of tin-lead-indium-based solder alloy for photovoltaic ribbons, the specific steps are as follows:

[0045] Step 1. Weigh each metal particle raw material: respectively weigh tin particles, lead particles, indium particles and gallium particles with a purity of 99.99%, so that each component in the alloy meets the following conditions by mass percentage: Sn63%, Pb 33% , In 3%, Ga1%, the sum of the above component mass percentages is 100%;

[0046] Step 2: Perform ultrasonic cleaning on each metal particle raw material weighed in Step 1, and the ultrasonic cleaning time is 40 minutes;

[0047] Step 3: Smelt the metal particle raw materials after ultrasonic cleaning in step 2 and heat them to melt, and use KCl+LiCl molten salt with a mass ratio of 1.25:1 for protection during the smelting process;

[0048] Step 3.1: Put the tin particles, lead particles and indium particles after ultrasonic cleaning in step 2 into a ceramic crucible and heat...

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Abstract

The invention discloses a tin, lead and indium-based solder alloy for a photovoltaic solder strip. The tin, lead and indium-based solder alloy is prepared from the following components in percent by mass: 58-63% of Sn, 33-40% of Pb, 1-3% of In and 0.1-1% of Ga, totaling 100%. The alloy has a relatively low melting point. A preparation method comprises the following steps: S1, weighing tin particles, lead particles, indium particles and gallium particles the purities of which are 99.99% separately, and meeting the following condition that the components in the alloy comprise, in percent by mass, 58-63% of Sn, 33-40% of Pb, 1-3% of In and 0.1-1% of Ga; S2, ultrasonically cleaning the raw materials weighed in the S1; S3, smelting the ultrasonically cleaned raw materials in the S2; and S4, casting the tin-lead-indium-gallium alloy prepared in the S3 into alloy ingots. The method is simple and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous alloys and photovoltaic ribbons, and in particular relates to a tin-lead-indium-based solder alloy for photovoltaic ribbons; the invention also relates to a preparation method of the tin-lead-indium-based solder alloy for photovoltaic ribbons. Background technique [0002] With the prosperity and development of modern industry, the energy consumption of fossil fuels such as traditional coal, oil, and natural gas is increasing day by day, resulting in a sharp decline in the reserves of fossil fuels in the earth's crust, and the world's energy crisis has become increasingly prominent. The research and development of new clean energy is imminent, such as solar energy, wind energy, water energy, nuclear energy and so on. Compared with water energy, wind energy, nuclear energy, etc., solar energy has no emission and noise when it is converted into other energy (mainly electric energy), so solar ene...

Claims

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Application Information

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IPC IPC(8): B23K35/26B23K35/40C22C1/03C22C13/00
CPCB23K35/262B23K35/40C22C1/03C22C13/00
Inventor 张敏慕二龙许桓瑞李静王晓伟史杰
Owner XIAN UNIV OF TECH
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