Kovar-based layered composite material for solar cell array interconnection sheet and preparation process of Kovar-based layered composite material

A solar cell array and composite material technology, which is applied in the field of silver/4J29/silver metal-based composite materials and preparation technology, can solve the problems of no protective effect of oxide film, poor molybdenum cold working shape, poor molybdenum weldability, etc. Achieve the effect of large difference in deformation resistance, large difference in recrystallization temperature and low cost

Pending Publication Date: 2022-04-26
朱解祖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem of using molybdenum and molybdenum alloys instead of silver as the interconnect material is that the solderability of molybdenum is relatively poor, and it will be strongly oxidized at high temperatures, and the oxide film has no protective effect
However, molybdenum's cold working shape is extremely poor, and it is difficult to form composite materials by conventional rolling composite methods, and the electroplating method has led to the same problem as silver-plated alloy foil.

Method used

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  • Kovar-based layered composite material for solar cell array interconnection sheet and preparation process of Kovar-based layered composite material

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Embodiment 1

[0028] The invention proposes a metal-based composite material for a solar cell array interconnect sheet, such as figure 1 As shown, the composite material is a three-layer layered structure with a total width of 25 mm and a total thickness of 26 μm, in which the first and third layers are both silver layers 1 with a thickness of 7 μm, and the oxygen content is lower than 50 ppm. The layer is 4J29 alloy layer 2 with a thickness of 12 μm.

[0029] The present invention also proposes a preparation process of a metal-based composite material for a solar cell array interconnect sheet, comprising the following steps:

[0030] Step 1: Put the pure silver plate with a purity greater than 99.99% through two vacuum smelting methods to smelt the silver plate with an oxygen content lower than 50ppm. The vacuum degree of the smelting equipment during the vacuum smelting process is not less than 10 -2 Pa. The above-mentioned silver plates are processed into silver strips with a thickness...

Embodiment 2

[0036] The present invention provides a kovar-based composite material for interconnecting sheets of solar cell arrays, such as figure 1 As shown, the composite material is a three-layer layered structure with a total width of 25 mm and a total thickness of 44 μm, in which the first and third layers are both silver layers 1 with a thickness of 7 μm and an oxygen content of less than 50 ppm. The layer is 4J29 alloy layer 2 with a thickness of 30 μm.

[0037] The present invention also proposes a preparation process of the metal-based composite material for the solar cell array interconnection sheet, comprising the following steps:

[0038] In step 1, the pure silver plate with a purity greater than 99.99% is smelted through three vacuum smelting methods, and the silver plate with an oxygen content lower than 50 ppm is smelted. The vacuum degree of the smelting equipment in the vacuum smelting process is not less than 10. -2 Pa. The above-mentioned silver plate is processed in...

Embodiment 3

[0044] The present invention proposes a metal-based composite material for interconnecting sheets of solar cell arrays, such as figure 1 As shown, the composite material is a three-layer layered structure with a total width of 100mm and a total thickness of 26μm, in which the first and third layers are both silver layers 1 with a thickness of 7μm and an oxygen content of less than 50ppm. The layer is 4J29 alloy layer 2 with a thickness of 12 μm.

[0045] The present invention also proposes a preparation process of the metal-based composite material for the solar cell array interconnection sheet, comprising the following steps:

[0046] In step 1, the pure silver plate with a purity greater than 99.99% is smelted through three vacuum smelting methods, and the silver plate with an oxygen content lower than 50 ppm is smelted. The vacuum degree of the smelting equipment in the vacuum smelting process is not less than 10. -2 Pa. The above-mentioned silver plate is processed into ...

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Abstract

The invention discloses a Kovar-based layered composite material for a solar cell array interconnection sheet and a preparation process, the composite material is of a three-layer layered structure, the total width is 25-100 mm, the total thickness is 25-60 [mu] m, the first layer and the third layer are silver layers, the thickness is 7 [mu] m, the oxygen content is lower than 50 ppm, the second layer is a Kovar (4J29) alloy layer, and the thickness is 11-46 [mu] m; according to the preparation process, a different-temperature rolling compounding mode is adopted, and meanwhile high-temperature diffusion at 800-900 DEG C is adopted. The composite material prepared by the invention belongs to a metallurgical bonding layered composite material, not only has excellent heat resistance, high-temperature mechanical property and stable expansion coefficient of Kovuo (4J29) alloy, but also gives full play to the conductivity and atmospheric corrosion resistance of silver, can greatly improve the reliability of a solar cell array interconnection sheet, and has good application prospects. Therefore, the service life of the solar cell array is greatly prolonged.

Description

technical field [0001] The invention relates to a Kovar base-layer composite material and a preparation process, in particular to a silver / 4J29 / silver metal base-layer composite material and a preparation process for long-life aerospace vehicle solar cell array interconnection sheets. Background technique [0002] The solar cell array interconnect sheet currently uses pure silver foil, which is used because of its good electrical conductivity and ability to resist air pollution. However, when the spacecraft is in service on LEO, the temperature will change drastically during orbital flight and cause thermal shock. The pure silver material is soft and has low strength, which is prone to fracture and failure. Iron-cobalt-nickel Kovar 4J29 alloy has excellent heat resistance, high-temperature mechanical properties and stable expansion coefficient. Therefore, the domestic solar cell array interconnection uses silver-plated iron-cobalt-nickel Kovar 4J29 alloy foil, but due to the...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B37/74B21B15/00B32B15/01B32B38/00B32B38/16B32B37/06B32B37/10
CPCB21B1/38B21B37/74B21B15/00B32B15/01B32B38/0012B32B38/0036B32B38/162B32B37/06B32B37/10B32B38/0004B32B38/164B21B2001/386B32B2038/0048B32B2307/306B32B2307/202B32B2307/714
Inventor 朱解祖
Owner 朱解祖
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