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Photovoltaic encapsulation material poe film with resistance to potential-induced attenuation

A potential-induced decay, packaging material technology, used in films/sheets without carriers, adhesives, adhesive additives, etc., which can solve the problems of easy diffusion of positive ions, large charge relationship, and PID failure.

Active Publication Date: 2021-08-20
SHANGHAI HIUV APLLIED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] PID decay and AlO in bifacial battery modules x The amount of charge has a large relationship, and the PID failure of the P-type double-sided battery occurs on the back side of the Al 2 o 3 Passivation fails, causing positive ions to easily diffuse into the battery, resulting in PID failure; N-type monocrystalline double-sided batteries are prone to PID attenuation on the front side, even if ordinary POE film is used, there will still be PID problems

Method used

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  • Photovoltaic encapsulation material poe film with resistance to potential-induced attenuation
  • Photovoltaic encapsulation material poe film with resistance to potential-induced attenuation
  • Photovoltaic encapsulation material poe film with resistance to potential-induced attenuation

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Experimental program
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Effect test

Embodiment 1

[0018]

[0019] The above components are fully mixed and then added to the extruder. The extrusion temperature is 90°C. Extrude through a T-shaped flat die to form a film, or directly pass through two calender rolls to form a film and wind it up. Cut the rolled anti-PID POE film to the size of the solar photovoltaic module, and stack it according to the structural order of glass / anti-PID POE film / P-type PERC single crystal double-sided cell / anti-PID POE film / glass And evacuated and laminated at 150°C, the vacuuming time was 5 minutes, and the lamination time was 12 minutes. The power attenuation is 1.1%, and the power attenuation at the back of the module is 1.5%. Under the same conditions, the power attenuation at the front of the module with the upper and lower layers of ordinary POE film is 5%, and the power attenuation at the back of the module is 16%. After lamination under the same conditions, the cross-linking degree of the film measured by xylene extraction method i...

Embodiment 2

[0021]

[0022]

[0023] The above components are fully mixed and then added to the extruder. The extrusion temperature is 90°C. Extrude through a T-shaped flat die to form a film, or directly pass through two calender rolls to form a film and wind it up. Cut the rolled anti-PID POE film into the same size as the solar photovoltaic module, stack and Vacuumize and laminate at 150°C, the vacuum time is 5 minutes, and the lamination time is 20 minutes. In the PID experiment (85% humidity and 85°C, -1000V, 192hr) of the obtained laminate, the component power decays 1.1%, under the same conditions, the attenuation of the module with ordinary POE film on the upper and lower layers is 9.6%. After lamination under the same conditions, the cross-linking degree of the film measured by xylene extraction method is 80%, and the residual enthalpy value of the film after cross-linking measured by DSC is 0.001J / g.

Embodiment 3

[0025] Element parts by weight POE (1:1 mixture of ethylene-butene copolymer and ethylene-octene copolymer) 96 Hydroxyethylacrylamide 0.5 Triallyl isocyanurate (TAIC) 1 3-aminopropyltriethoxysilane (silane coupling agent KH550) 1 Dicumyl peroxide (peroxide crosslinker DCP) 1 N,N'-di-sec-butyl-p-phenylenediamine (Antioxidant 4720) 0.5

[0026] The above components are fully mixed and then added to the extruder. The extrusion temperature is 90°C. Extrude through a T-shaped flat die to form a film, or directly pass through two calender rolls to form a film and wind it up. Cut the rolled anti-PID POE adhesive film to the size of the solar photovoltaic module, stack it in the order of glass / anti-PID POE adhesive film / N-type high-efficiency battery sheet / anti-PID POE adhesive film / backsheet and in 150 Vacuumize and laminate at ℃, the vacuum time is 5 minutes, and the lamination time is 15 minutes. In the PID experiment (85% humidity ...

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Abstract

In order to overcome the potential-induced degradation (PID) problem of photovoltaic modules, the present invention proposes a photovoltaic packaging material POE adhesive film that resists potential-induced degradation. The internal crosslinking agent used in the adhesive film contains double bonds and amide groups at the same time. High, in addition, the internal crosslinking agent is an ethylenic monomer, which has good compatibility with polyolefin elastomers and high crosslinking density after the reaction. The POE film is used on the front, back or both sides of the battery sheet to prevent water vapor from eroding the battery sheet. Positive, effectively prevents Na in the glass + 、K + , Ca 2+ Waiting for cations to migrate to the surface of the cell, so that the photovoltaic modules in the power station have anti-PID performance; on the other hand, the combination of organic peroxide crosslinking agent, internal crosslinking agent and co-crosslinking The residual enthalpy of the adhesive film after bonding is very low, which reduces the generation of impurities, further improves the anti-PID performance of the module, and ensures the normal output of the power of the photovoltaic module.

Description

technical field [0001] The invention relates to an adhesive film and a preparation method thereof, in particular to a photovoltaic packaging material POE adhesive film resistant to potential-induced decay (PID). Background technique [0002] In recent years, with the development of battery technologies such as PERC and PERT, the production capacity of double-sided battery modules has further increased. From the perspective of double-glass module packaging, if POE packaging is used, its reliability and stability have an obvious advantage. Compared with EVA itself, it will decompose under long-term ultraviolet radiation and produce acetic acid and water. Because the glass itself does not transmit water vapor, there are certain hidden dangers in reliability. If it is a backplane package, the backplane has a certain water vapor transmission rate, but the glass basically has zero water vapor transmission rate, and it is difficult to get out from EVA. , This will also have an imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/10C09J4/02C09J4/06C09J11/06
Inventor 杨英李民
Owner SHANGHAI HIUV APLLIED MATERIALS CO LTD
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