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Alloy welding flux, preparation method thereof and application thereof

A solder and alloy technology, which is applied in the field of photovoltaic cell welding technology and alloy solder, can solve problems such as not being able to meet lamination welding requirements, achieve excellent welding performance and electrical performance, reduce production energy consumption, and reduce operating steps.

Active Publication Date: 2016-03-09
QINGHAI HUANGHE HYDROPOWER DEV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the melting point of the solder is still higher than the maximum lamination temperature for welding without busbar electrodes, it cannot meet the lamination welding requirements

Method used

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  • Alloy welding flux, preparation method thereof and application thereof
  • Alloy welding flux, preparation method thereof and application thereof
  • Alloy welding flux, preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] S1: Use an electronic balance to weigh 317g of tin, 310g of lead, and 366g of bismuth, add the weighed tin, lead, and bismuth into a graphite crucible, and use a vacuum melting furnace to heat and melt the tin, lead, and bismuth in vacuum. Vacuum heating and smelting includes adjusting the vacuum degree to -0.1~0.1MPa, setting the heating temperature to 500°C for heating, and heating the tin, lead and bismuth to 500°C together to be in a completely molten state, and then keeping it warm for 30 minutes. The mixture of tin, lead and bismuth is taken out and poured into a mold for cooling to obtain the first component.

[0056] S2: Divide the first component into six equal parts, take one part and add 1g of indium, add the first component with indium into the graphite crucible, use a vacuum melting furnace The first component is smelted under vacuum heating. Vacuum heating and smelting includes adjusting the vacuum degree to -0.1-0.1MPa, setting the heating temperature to...

Embodiment 2

[0066] S1: Use an electronic balance to weigh 300g of tin, 380g of lead, and 315g of bismuth, add the weighed tin, lead, and bismuth into a graphite crucible, and use a vacuum melting furnace to heat and melt the tin, lead, and bismuth in a vacuum. Vacuum heating and smelting includes adjusting the vacuum degree to -0.1~0.1MPa, setting the heating temperature to 500°C for heating, and heating the tin, lead and bismuth to 500°C together to be in a completely molten state, and then keeping it warm for 30 minutes. The mixture of tin, lead and bismuth is taken out and poured into a mold for cooling to obtain the first component.

[0067] S2: Divide the first component into five equal parts, take one part and add 2g of indium, add the first component with indium into the graphite crucible, use a vacuum melting furnace to The first component is smelted under vacuum heating. Vacuum heating and smelting includes adjusting the vacuum degree to -0.1-0.1MPa, setting the heating temperat...

Embodiment 3

[0076] S1: Use an electronic balance to weigh 285g of tin, 430g of lead, and 280.2g of bismuth, add the weighed tin, lead, and bismuth into the graphite crucible, and use a vacuum melting furnace to heat and melt the tin, lead, and bismuth in a vacuum . Vacuum heating and smelting includes adjusting the vacuum degree to -0.1~0.1MPa, setting the heating temperature to 500°C for heating, and heating the tin, lead and bismuth to 500°C together to be in a completely molten state, and then keeping it warm for 30 minutes. The mixture of tin, lead and bismuth is taken out and poured into a mold for cooling to obtain the first component.

[0077] S2: Divide the first component into five equal parts, take one part and add 1g of indium, add the first component with indium into the graphite crucible, use a vacuum melting furnace to The first component is smelted under vacuum heating. Vacuum heating and smelting includes adjusting the vacuum degree to -0.1-0.1MPa, setting the heating te...

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Abstract

The invention relates to low-temperature alloy welding flux, a preparation method thereof and an application thereof. The alloy welding flux comprises the following components in parts by weight: 17-35 parts of tin, 20-45 parts of lead, 20-40 parts of bismuth, 0.1-2 parts of indium, 0.1-0.5 part of antimony, 0.01-0.2 part of phosphor and 0.01-0.8 part of a rare earth element. The alloy welding flux is the alloy welding flux which takes a tin-lead-bismuth three-phase alloy as a principle component, has a melting point lower than 145 DEG C which is lower than a laminating temperature during welding of a tinned copper wire, is suitable for a laminating process of a photovoltaic module, and realizes integration of a welding process and the laminating process of a main-grid-free battery.

Description

technical field [0001] The invention relates to the field of photovoltaic cell welding technology and alloy solder, in particular to a low-temperature alloy solder, its preparation method and its application in a busbar-free battery welding process. Background technique [0002] As a clean energy source, solar energy is gradually being widely used, and solar power generation technology has also made rapid developments, which has greatly increased the output of solar modules. However, in the current production process of solar cell modules, there are problems such as low conversion efficiency, large power loss, and high production costs. Therefore, some people propose to use non-busbar cells instead of traditional cells with busbars (three busbars are more common) to produce solar energy. battery pack. In the battery assembly without main grid battery, when adjacent batteries are connected in series, tin-plated copper wires are used to replace the traditional interconnection...

Claims

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Application Information

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IPC IPC(8): B23K35/26
CPCB23K35/26B23K35/262B23K35/0222
Inventor 杨振英何凤琴李嘉亮卢刚张治郭灵山
Owner QINGHAI HUANGHE HYDROPOWER DEV
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