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Solar cell array interconnection material and preparation method thereof

A technology for solar cell arrays and interconnecting materials, applied in the field of solar cells, can solve problems such as defects in electroplated metal layers, atomic oxygen erosion, coating cracking, etc. Effect

Active Publication Date: 2021-10-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have certain defects, such as the thermal cycle stress and thermal fatigue generated in space flight will cause the coating to crack and fall off, and the electroplated metal layer generally has defects, and atomic oxygen corrosion will still occur.

Method used

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  • Solar cell array interconnection material and preparation method thereof
  • Solar cell array interconnection material and preparation method thereof
  • Solar cell array interconnection material and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a method for preparing the above solar cell array interconnection material, comprising: S1) laminating the first gold-silver alloy plate, the silver plate, and the second gold-silver alloy plate and performing hot-pressing diffusion connection to obtain a composite material ; The mass concentration of the silver element in the first gold-silver alloy plate and the second gold-silver alloy plate is independently 0.001%-0.005%; S2) rolling the composite material to obtain a solar cell array interconnection material.

[0037] Among them, the present invention has no special limitation on the sources of all raw materials, which can be commercially available.

[0038]In the present invention, the thicknesses of the first gold-silver alloy plate and the second gold-silver alloy plate are independently 1-2 mm; the first gold-silver alloy plate and the second gold-silver alloy plate are preferably prepared by cold rolling To obtain, specifica...

Embodiment 1

[0047] a) Vacuum smelting of gold and silver to obtain a gold-silver alloy ingot (8×100×200mm), the composition mass percentage is: Au99.995%, Ag 0.005%; the melting temperature is 1100°C.

[0048] b) Rolling of gold and silver alloy ingots: cold rolling into plates to a thickness of 1 mm; the specific rolling process of rolling with a reduction of 20% in each pass is 8.0-7.0-6.0-5.0-4.0-3.0-2.0-1.0.

[0049] c) Equal angular rolling of pure silver (final rolling to 2.14mm thick): equal angular rolling temperature 400°C, holding time 1 hour, processing speed 1mm / s; final rolling reduction 10%; channel gap 1.0mm; the angle between the two channels of the mold is 120°, and the inner arc radius of the channel is 2mm (the arc angle is 65°).

[0050] d) Cutting: Cut the gold-silver alloy plate and pure silver plate to 70×70mm.

[0051] e) Pretreatment: Sand the surface of the cut gold-silver alloy plate and pure silver plate with sandpaper, clean it with alcohol, and dry it with c...

Embodiment 2

[0057] a) Vacuum smelting of gold and silver to obtain a gold-silver alloy ingot (8×100×200mm), the composition mass percentage is: Au99.999%, Ag 0.001%; ​​the melting temperature is 1150°C.

[0058] b) Rolling of gold and silver alloy ingots: cold rolling into plates to a thickness of 1mm; the reduction in each pass is 20%, and the specific rolling process is 8.0-7.0-6.0-5.0-4.0-3.0-2.0-1.0 .

[0059] c) Equal angular rolling of pure silver (final rolling to 4.4mm thick): equal angular rolling temperature 400°C, holding time 1 hour, processing speed 1mm / s; final rolling reduction 10%; channel gap 1.0mm; the angle between the two channels of the mold is 120°, and the inner arc radius of the channel is 2mm (the arc angle is 65°).

[0060] d) Cutting: Cut the gold-silver alloy plate and pure silver plate to 100×100mm.

[0061] e) Pretreatment: Sand the surface of the cut gold-silver alloy plate and pure silver plate with sandpaper, clean it with alcohol, and dry it with cold a...

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Abstract

The invention provides a solar cell array interconnection material. The solar cell array interconnection material comprises a first gold-silver alloy material layer, a silver layer and a second gold-silver alloy material layer which are arranged in sequence; and the mass concentration of the silver element in the first gold-silver alloy material layer and the mass concentration of the silver element in the second gold-silver alloy material layer are respectively and independently 0.001%-0.005%. Compared with the prior art, the solar cell array interconnection material provided by the invention has the advantages that the gold-silver alloy material layer and the silver layer on the outer side have high bonding performance, so that the layers of the interconnection material are tightly bonded and are not easy to strip, and meanwhile, the gold-silver alloy material on the outer side has high atomic oxygen corrosion resistance; and meanwhile, the middle high-plasticity silver layer forms a stress buffer zone, so that the solar cell array interconnection material has relatively high atomic oxygen corrosion resistance and good mechanical property.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a solar cell array interconnection material and a preparation method thereof. Background technique [0002] The spacecraft power system is composed of a solar cell array as a power generation device, a battery pack as an energy storage device, and a power control device with corresponding functions required by the power distribution system. The solar array generates electricity during the orbital light period, provides electrical energy for the spacecraft's electrical loads, and charges the battery pack at the same time. [0003] The solar cell array is composed of a large number of solar cells, which are pasted on the solar panel in an orderly manner, and use the photoelectric effect of the solar cells to convert the incident sunlight radiation into electrical energy. Although each cell contributes a small amount of current and voltage, a large number of cells can be connec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01C22C5/02C22F1/14C22F1/02B21B1/38B21B37/74H01L31/05
CPCB32B15/018C22C5/02C22F1/14C22F1/02B21B1/38B21B37/74H01L31/0512B32B2307/714B32B2457/12B21B2001/386Y02E10/50
Inventor 姚映君王日初张树勋马会斌彭超群冯艳王小锋蔡志勇
Owner CENT SOUTH UNIV
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