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Single-component conductive silica gel for solar packaging and preparation method thereof

A technology of solar energy encapsulation and conductive silica gel, which is applied in the direction of conductive adhesives, circuits, adhesives, etc., can solve the problems of unsatisfactory aging performance, low temperature resistance, inability to meet the needs of fast stacking of assembly lines, and huge cost pressures. Low cost, good aging resistance, low hot spot effect

Active Publication Date: 2019-03-01
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the conventional conductive adhesive products on the market are epoxy system, acrylic system and silicone system. The epoxy system has the advantage of its good adhesion, but its aging performance, especially the low temperature resistance performance is not satisfactory; the acrylic system is characterized by its fast Curing, good bonding and aging properties occupy the advantages, but its low rework efficiency and high mechanical load failure rate limit the use of acrylic systems; silicone systems are dominated by their low stress, good wettability and excellent aging resistance. Advantages, but the shrinkage rate of the system is small, and a high proportion of silver powder needs to be added, resulting in huge cost pressure. In addition, the silicone pure silver system needs high temperature and long time (180°C / 2h) curing, which cannot meet the needs of rapid lamination of the assembly line

Method used

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  • Single-component conductive silica gel for solar packaging and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] At room temperature, according to the components specified in Example 1 in Table 1, liquid methyl vinyl silicone oil with a vinyl content of 0.05 mmol / g and a viscosity of 50,000 cps, coupling agents KH560, Z-6040 and gas silicon R974 were placed in Knead in the kneader, knead for 1 hour until uniform, add solvent OS-10, silicon gas R8200 and mix for 20 minutes, then put low hydrogen silicone oil, terminal hydrogen silicone oil, epoxy silicone oil, vinyl silicone oil and platinum catalyst into the Mix in a double planetary mixer for 10-20 minutes until uniform, and finally add self-made modified silver powder AC-0295 and SF-30 three times, and mix at room temperature for 30 minutes in a vacuum at a low speed to obtain the solar energy encapsulation of the present invention. Conductive plastic.

[0032] Modification of silver powder: add 150ml of toluene to a four-neck flask, add 0.8g of coupling agent KH560, 50g of silver powder AC-0295 and SF-30, heat at 110°C and stir...

Embodiment 2

[0034] At room temperature, according to the components specified in Example 2 in Table 1, liquid methyl vinyl silicone oil with a vinyl content of 0.05 mmol / g and a viscosity of 50,000 cps, coupling agents KH560, Z-6040 and gas silicon R974 were placed in Knead in the kneader, knead for 1 hour until uniform, add solvent G-120, gas silicone R8200 and mix for 20 minutes, then put low hydrogen-containing silicone oil, terminal hydrogen-containing silicone oil, epoxy silicone oil, vinyl silicone oil and platinum catalyst into the Mix in a double planetary mixer for 10 to 20 minutes until uniform, and finally add self-made modified silver powder P777-1 and SF-30 three times, and mix at room temperature for 30 minutes in a vacuum at a low speed to obtain the conductive powder for solar energy packaging of the present invention. glue.

[0035] Modification treatment of silver powder: add 150ml xylene to a four-neck flask, add 0.8g coupling agent KH560, 60g each of silver powder P777...

Embodiment 3

[0037] At room temperature, according to the components specified in Example 3 in Table 1, liquid methyl vinyl silicone oil with a vinyl content of 0.05 mmol / g and a viscosity of 50,000 cps, coupling agents KH560, Z-6040 and gas silicon R974 were placed in Knead in the kneader, knead for 1 hour until uniform, add solvent G-120, gas silicone R8200 and mix for 20 minutes, then put low hydrogen silicone oil, terminal hydrogen silicone oil, epoxy silicone oil, vinyl silicone oil and platinum catalyst into the Mix in a double planetary mixer for 10-20 minutes until uniform, and finally add self-made modified silver powder AC-0295, P777-1 and SF-30 in three times, and mix at room temperature for 30 minutes in a vacuum at a low speed to prepare the solar energy Encapsulated conductive adhesive.

[0038]Modification of silver powder: add 150ml of toluene to a four-neck flask, add 0.8g of coupling agent Z-6040, 50g of silver powder AC-0295, P777-1 and SF-30, heat at 110°C and stir at h...

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Abstract

The invention relates to single-component conductive silica gel for solar packaging and a preparation method thereof. The single-component conductive silica gel is prepared from the following components in parts by weight: 55 to 80 parts of modified silver powder, 10 to 20 parts of addition type liquid silicone oil, 0.02 to 1 part of a coupling agent, 2 to 10 parts of a reinforcing agent, 0.5 to 4parts of a crosslinking agent, 2 to 5 parts of a special active diluting agent, 0.0002 to 0.02 part of a platinum catalyst and 5 to 20 parts of a solvent. The conductive silica gel provided by the invention can be rapidly cured at middle and low temperature and has low viscosity, and can meet the technical requirements of flow-line rapid curing of laminated sheets; the adding amount of silver islow so that the cost is relatively low and the single-component conductive silica gel can be applied to solar imbrication subassemblies on a large scale; furthermore, the single-component conductive silica gel has the advantages of no toxicity and environment protection, rapid heat dissipation, high conductivity and good anti-ageing performance and can meet the requirements of ultrahigh power, lowhot spot effect and outdoor 25-year service life of the imbrication subassemblies.

Description

technical field [0001] The invention relates to a conductive silica gel and a preparation method thereof, in particular to a single-component conductive silica gel for solar energy packaging and a preparation method thereof, belonging to the technical field of conductive adhesives. Background technique [0002] Under the circumstances of global warming, deterioration of the human ecological environment, and shortage of traditional energy sources, the solar energy industry has become one of the energy sources that governments generally attach importance to and support. Although the photovoltaic industry has achieved a wide range of applications and technological progress in recent years, there are still problems in technology and market risks that cannot be ignored. As the photoelectric conversion efficiency of crystalline silicon solar cells gradually exceeds 20%, people find it more and more difficult to further improve the efficiency of cells by optimizing traditional crys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/07C09J11/04C09J9/02C09J11/08H01L31/048
CPCC08K2003/0806C08L2203/206C08L2205/025C09J9/02C09J11/04C09J11/08C09J183/04H01L31/0481C08L83/04C08L83/06C08K9/06C08K3/08C08K3/36Y02E10/50
Inventor 沈双双陈田安王建斌解海华
Owner YANTAI DARBOND TECH
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