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A Welding Method for Large Area Thin High Efficiency Space Gallium Arsenide Solar Cells

A technology for solar cells and welding methods, applied in circuits, electrical components, sustainable manufacturing/processing, etc., can solve the problems of unsuitable welding conditions, prone to cracks, affecting production costs, etc., so as to improve welding reliability and reduce cracks. , the effect of reducing the splinter rate

Active Publication Date: 2021-05-25
中电科蓝天科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the welding process in the prior art is only aimed at the welding of general-purpose small-sized solar cells. For the welding of large-area thin solar cells, problems such as cracks are very likely to occur. Welding under this specification is not suitable for welding conditions, which affects production costs.

Method used

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  • A Welding Method for Large Area Thin High Efficiency Space Gallium Arsenide Solar Cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The welding method of a large-area thin high-efficiency space gallium arsenide solar cell described in this embodiment is specifically as follows:

[0020] The size of the welded large-area thin high-efficiency space gallium arsenide solar cells is 80mm×80mm×0.145mm, and the first batch of solar cells put into production totals more than 10,000 pieces.

[0021] 1. Adjust and check the welding process parameters, the welding power is 40W, the welding time is 40ms, the welding pressure is 1.6 pounds, check the lowering rate of the welding head, and adjust the welding speed so that the lowering rate of the welding head is 1.5 times / s;

[0022] 2. Place the spacer, place the spacer with a specification of 100mm×100mm directly under the welding head;

[0023] 3. Grinding the welding head, grinding the welding head into a flat circular structure, so that it has no local protrusions under the microscope, and performing a welding tensile test. The tensile test results meet the ...

Embodiment 2

[0028] The welding method of a large-area thin high-efficiency space gallium arsenide solar cell described in this embodiment is specifically as follows:

[0029] The size of the welded large-area thin high-efficiency space gallium arsenide solar cells is 80mm×80mm×0.145mm, and the second batch of solar cells put into production has a total of more than 8,000 pieces.

[0030] 1. Adjust and check the welding process parameters, the welding power is 65W, the welding time is 60ms, the welding pressure is 2.0 pounds, check the lowering rate of the welding head, and adjust the welding speed to the lowering rate of the welding head at 2.5 times / s;

[0031] 2. Place the spacer, place the spacer with a specification of 100mm×100mm directly under the welding head;

[0032] 3. Grinding the welding head, grinding the welding head into a flat circular structure, so that it has no local protrusions under the microscope, and performing a welding tensile test. The tensile test results meet t...

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Abstract

The invention provides a welding method for a large-area, thin, high-efficiency space gallium arsenide solar cell, which includes placing the solar cells and the interconnection on a spacer, and welding the solar cells and the interconnection by using parallel gap resistors. The welding speed is that the welding head descends at a rate of 1.5-2.5 times / s, and the length and width of the cross-sectional area of ​​the spacer are greater than the length and width of the solar cells. The welding method is suitable for large-area thin solar cells, and has high welding reliability, low split rate and high yield for the welding of large-area thin solar cells.

Description

technical field [0001] The invention belongs to the technical field of welding of space high-efficiency gallium arsenide solar cells, and in particular relates to a welding method of large-area thin high-efficiency space gallium arsenide solar cells. Background technique [0002] At present, gallium arsenide solar cell array is the most widely used power generation unit for satellites and spacecraft. In the fabrication process of gallium arsenide solar cell array, the interconnection material is connected to the gallium arsenide solar cell for space by welding to lead out the electrodes. At present, parallel gap resistance welding technology is generally used for welding gallium arsenide solar cells in domestic space, and the general specifications of solar cells are generally 20mm×40mm×0.175mm~40mm×80mm×0.175mm. The size of the special large-area thin gallium arsenide solar cell is 80mm×80mm, which is double the area of ​​the 40mm×80mm solar cell, and the thickness of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 刘汉英李晶任晓宇
Owner 中电科蓝天科技股份有限公司