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A kind of photovoltaic ribbon and preparation method thereof

A photovoltaic ribbon and solder technology, applied in photovoltaic power generation, semiconductor devices, electrical components, etc., can solve the problems of inconvenient processing procedures, increase the production process of ribbon, and cannot reduce the mechanical properties of ribbon, so as to improve the electrical conductivity and photoelectricity. Conversion efficiency, reduction of photoelectric conversion efficiency loss, and the effect of facilitating industrial production and application

Active Publication Date: 2020-06-09
XIAN TELISON NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, holes are opened on the surface of the welding strip to reduce the shading area and the usage of the welding strip, but the production process of the welding strip needs to be increased, and the position of the opening is very particular. On the one hand, the mechanical properties of the welding strip cannot be reduced, and on the other hand On the one hand, it brings inconvenience to the subsequent processing procedures, and it is necessary to bypass the hole position to complete the welding, which is a big challenge for stringer welding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A photovoltaic soldering strip, comprising a copper substrate and tin-lead alloy solder coated on the copper substrate, the tin-lead alloy solder contains 5.5% copper-tin alloy, 11% silver-tin alloy and 0.6% phosphorus-tin alloy, wherein , the mass ratio of copper to tin in the copper-tin alloy is 5:95, the mass ratio of silver to tin in the silver-tin alloy is 5:95, and the mass ratio of phosphorus to tin in the tin alloy is 5:95.

[0027] The preparation method of the above-mentioned photovoltaic ribbon includes the following preparation steps:

[0028] Step 1, adding copper-tin alloy, silver-tin alloy and phosphorus-tin alloy to the tin-lead alloy solder, heating and melting at 235°C to obtain photovoltaic ribbon coating;

[0029] Step 2, coating the photovoltaic ribbon coating on the surface of the copper strip at 80m / min, cooling to room temperature, and collecting the materials to obtain the photovoltaic ribbon.

Embodiment 2

[0031] A photovoltaic soldering strip, comprising a copper substrate and tin-lead alloy solder coated on the copper substrate, the tin-lead alloy solder contains 5.5% copper-tin alloy, 2% silver-tin alloy and 0.2% phosphorus-tin alloy, wherein , the mass ratio of copper to tin in the copper-tin alloy is 5:95, the mass ratio of silver to tin in the silver-tin alloy is 5:95, and the mass ratio of phosphorus to tin in the phosphorus-tin alloy is 5:95.

[0032] The preparation method of the above-mentioned photovoltaic ribbon includes the following preparation steps:

[0033] Step 1, adding copper-tin alloy, silver-tin alloy and phosphorus-tin alloy to the tin-lead alloy solder, heating and melting at 230°C to obtain photovoltaic ribbon coating;

[0034] Step 2, coating the photovoltaic ribbon coating on the surface of the copper strip at a rate of 90 m / min, cooling to room temperature, and collecting the materials to obtain the photovoltaic ribbon.

Embodiment 3

[0036] A photovoltaic soldering strip, comprising a copper substrate and tin-lead alloy solder coated on the copper substrate, the tin-lead alloy solder contains 1% copper-tin alloy, 20% silver-tin alloy and 1% phosphorus-tin alloy, wherein , the mass ratio of copper to tin in the copper-tin alloy is 5:95, the mass ratio of silver to tin in the silver-tin alloy is 5:95, and the mass ratio of phosphorus to tin in the phosphorus-tin alloy is 5:95.

[0037] The preparation method of the above-mentioned photovoltaic ribbon includes the following preparation steps:

[0038] Step 1, adding copper-tin alloy, silver-tin alloy and phosphorus-tin alloy to the tin-lead alloy solder, heating and melting at 230°C to obtain photovoltaic ribbon coating;

[0039] Step 2, coating the photovoltaic ribbon coating on the surface of the copper strip at 80m / min, cooling to room temperature, and collecting the materials to obtain the photovoltaic ribbon.

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PUM

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Abstract

The invention discloses a photovoltaic solder strip and a preparation method therefor. The photovoltaic solder strip comprises a base material and a tin lead alloy solder coated on the base material;and the tin lead alloy solder comprises 0.05-0.5% of copper, 0.1-1% of silver and 0.01-0.05% of phosphorus. By virtue of the copper, silver and phosphorus elements added to the tin lead alloy solder,the oxidization resistance, the wettability and release force intensity of the photovoltaic solder strip can be improved; meanwhile, the resistivity of the photovoltaic solder strip is lowered by 9.8%, equivalently, the power of a photovoltaic assembly is improved by about 0.8W, so that loss of photoelectric conversion efficiency caused by loss of resistance power can be lowered; the copper, silver and phosphorus elements have relatively high intermiscibility, so that corrosion of a tin liquid to the added copper and silver elements can be suppressed, and a phenomenon of insufficient solder ofthe battery piece can be avoided; the surface layer of the photovoltaic solder strip is rich in phosphorus-tin alloy, so that an effect of lowering the partial temperature of a soldering point in battery piece soldering also can be played, thereby facilitating soldering; and in addition, the photovoltaic solder strip has simple preparation method, low cost, easy operation and implementation, no environmental pollution, and convenience in realizing industrial production and application.

Description

technical field [0001] The invention relates to the technical field of solar photovoltaic welding ribbon and its processing, in particular to a photovoltaic welding ribbon and a preparation method thereof. Background technique [0002] Photovoltaic ribbon is an important raw material in the welding process of photovoltaic modules. The quality of the ribbon will directly affect the current collection efficiency of photovoltaic modules and greatly affect the power of photovoltaic modules. At present, conventional photovoltaic modules use interconnection strips to connect different cells in series, and achieve the purpose of module power output through busbars. The ribbon connects the cells in series, one end of the ribbon is welded to the front of the battery, the other end is welded to the back of the other battery, and packaged into the photovoltaic module. Sunlight enters the battery from the front of the battery, and the ribbon on the front will block a part of the silico...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/05
CPCY02E10/50
Inventor 张辉李少萌陈庆谊年有权
Owner XIAN TELISON NEW MATERIAL
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