Conductive welding wire for solar cell and preparation method thereof

A solar cell and welding wire technology, applied in welding equipment, circuits, welding media, etc., can solve the problems of high production cost of solar cell panel welding, environmental pollution of conductive welding wire, low photoelectric conversion efficiency of solar cell panels, etc., and achieves increased photoelectric conversion. Efficiency, good wetting and spreading, and the effect of reducing high temperature impact damage

Active Publication Date: 2017-06-13
JIANGSU XINGDA STEEL TYPE CORD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the object of the present invention is to provide a conductive welding wire for solar cells and a preparation method thereof, to solve the problem of low photoelectric conversion efficiency of solar panels in the prior art, high production costs for solar panel welding and the production of conductive welding wires. and environmental pollution caused by the application process

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  • Conductive welding wire for solar cell and preparation method thereof
  • Conductive welding wire for solar cell and preparation method thereof
  • Conductive welding wire for solar cell and preparation method thereof

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preparation example Construction

[0023] Also, see figure 2 , figure 2 Shown is a flowchart of a method for preparing a conductive welding wire for solar cells according to the present invention. The present invention also provides a method for preparing the above-mentioned conductive welding wire for solar cells, and the above-mentioned preparation method includes the following steps:

[0024] Step S1: Select copper wire with a copper content greater than 99.99% as the copper core, and the diameter of the copper wire is, for example, 0.18-0.72 mm;

[0025] Step S2: annealing the copper wire, and using absolute ethanol for annealing protection, wherein the annealing temperature is 400±50° C., and the annealing time is 30 minutes, and then using absolute ethanol to cool the annealed copper wire;

[0026] Step S3: using absolute ethanol to perform ultrasonic vibration cleaning on the cooled copper wire;

[0027] Step S4: drying the cleaned copper wire with nitrogen;

[0028] Step S5: Pickling and activatin...

Embodiment 1

[0032] In this embodiment, the preparation method of the conductive welding wire used for solar cells comprises the following steps:

[0033] (1) Select copper wire with a copper purity greater than 99.99% as the copper core, and the diameter of the copper wire is 0.40mm;

[0034] (2) annealing the copper wire, and using absolute ethanol for annealing protection, wherein the annealing temperature is 400±50°C, and the annealing time is 30 minutes, and then using absolute ethanol to cool the annealed copper wire;

[0035] (3) Use dehydrated alcohol to carry out ultrasonic vibration cleaning to the copper wire after cooling;

[0036] (4) Utilize nitrogen to blow dry the copper wire after cleaning;

[0037] (5) Pickling and activating the surface of the dried copper wire by pickling activating solution, the pickling activating solution is for example prepared by methanesulfonic acid and water, and the consumption of methanesulfonic acid is 50mL / L;

[0038](6) The copper wire aft...

Embodiment 2

[0041] In this embodiment, the preparation method of the conductive welding wire used for solar cells comprises the following steps:

[0042] (1) Select copper wire with a copper purity greater than 99.99% as the copper core, and the diameter of the copper wire is 0.21mm;

[0043] (2) annealing the copper wire, and using absolute ethanol for annealing protection, wherein the annealing temperature is 400±50°C, and the annealing time is 30 minutes, and then using absolute ethanol to cool the annealed copper wire;

[0044] (3) Use dehydrated alcohol to carry out ultrasonic vibration cleaning to the copper wire after cooling;

[0045] (4) Utilize nitrogen to blow dry the copper wire after cleaning;

[0046] (5) Pickling and activating the surface of the dried copper wire with a pickling activating solution, the pickling activating solution is for example prepared by methanesulfonic acid and water, and the consumption of the methanesulfonic acid is 100mL / L;

[0047] (6) The coppe...

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Abstract

The invention discloses a conductive welding wire for a solar cell and a preparation method thereof. The cross section of the conductive welding wire is circular; the conductive welding wire comprises a copper core and a welding material layer; the cross section of the copper core is circular; and the outer surface of the copper core is clad with the welding material layer, and the welding material layer is composed of tin bismuth alloy materials. According to the conductive welding wire for the solar cell and the preparation method thereof, the problems that existing solar panels are low in photoelectric conversion efficiency and high in welding production cost, and environmental pollution is caused in the process of production and application of the conductive welding wire are solved.

Description

technical field [0001] The invention relates to materials for photovoltaic functional components of solar cells, in particular to a conductive welding wire for solar cells and a preparation method thereof. Background technique [0002] Photovoltaic conductive welding wire for solar cells is a welding material used on photovoltaic modules, which mainly plays the role of connecting and conducting electricity. At present, the commonly used photovoltaic ribbon is prepared by hot-coating tin on the surface of a copper strip with high elongation, high tensile strength and high conductivity. The cross-section of the conventional photovoltaic ribbon is rectangular. In order to reduce the resistance of the ribbon, it is necessary to increase the cross-sectional area of ​​the ribbon. There are two ways to increase the cross-sectional area of ​​the base material of the tin-coated copper ribbon. Under the same material, one is Increase the thickness of the substrate, and the other is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/26B23K35/40B23K35/12H01L31/05
CPCY02E10/50B23K35/264B23K35/0261B23K35/40H01L31/0508H01L31/0512
Inventor 华欣魏于博姚利丽周志嵩冯国兵陈学春
Owner JIANGSU XINGDA STEEL TYPE CORD
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