Packaging adhesive film and solar cell module using same

A solar cell and encapsulation adhesive film technology, which is applied to electrical components, film/sheet adhesives, circuits, etc., can solve problems such as battery surface passivation, high insulation, and component resistance increase

Pending Publication Date: 2020-10-23
浙江中聚材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a long-term high temperature and high humidity environment, the EVA film is easily hydrolyzed, releasing acetic acid to corrode the circuit, resulting in an increase in component resistance and a decrease in power generation; in addition, acetic acid will also react with sodium and calcium salts in the glass to generate free metal ions
The solar cell module and the grounding frame can form a high voltage of more than 1000V, and a large number of metal ions and acetate ions and other charges accumulate on the surface of the cell, which makes the surface of the cell passivated, resulting in the performance of the component attenuation, that is, the PID phenomenon
[0003] POE film has the advantages of low water permeability and high insulation. It will not produce acetic acid after long-term use, and has excellent anti-PID performance. However, the bonding force between POE film and glass is low. Delamination phenomenon of POE film

Method used

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  • Packaging adhesive film and solar cell module using same
  • Packaging adhesive film and solar cell module using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] like figure 1 As shown, the packaging adhesive film includes an outer layer 1, a PO core layer 2, and an inner layer 3, the outer layer 1 is cross-linked EVA, and the PO core layer 2 is polyolefin (PO) and polyolefin elastomer modified A mixed material of material (POE), the inner layer 3 is cross-linked EVA. The encapsulant film is applied to a solar cell assembly, and the solar cell assembly includes a back plate 4, a battery sheet 5, and a glass 6. Between the back plate 4 and the battery sheet 5, and between the battery sheet 5 and the glass 6 are respectively An encapsulation film is provided, the outer layer 1 of the encapsulation film between the back plate 4 and the battery slice 5 is close to the back plate 4 , and the inner layer 3 is close to the battery slice 5 . The inner layer 3 of the encapsulant film between the battery sheet 5 and the glass 6 is close to the battery sheet 5 , and the outer layer 1 is close to the glass 6 . The thickness of the packagi...

Embodiment 2

[0023] like figure 2 As shown, the packaging adhesive film includes an outer layer 1, a PO core layer 2, and an inner layer 3, the outer layer 1 is EVA / PE, and the PO core layer 2 is polyolefin (PO) and polyolefin elastomer modified The mixed material of the material (POE), the mixing ratio of polyolefin (PO) and polyolefin elastomer modified material (POE) is 4:1. The inner layer 3 is cross-linked EVA. The encapsulant film is applied to a solar cell assembly, and the solar cell assembly includes a back plate 4, a battery sheet 5, and a glass 6. Between the back plate 4 and the battery sheet 5, and between the battery sheet 5 and the glass 6 are respectively An encapsulation film is provided, the outer layer 1 of the encapsulation film between the backplane 4 and the cell 5 is close to the backplane 4, the inner layer 3 is close to the cell 5, and the inner layer of the encapsulation film between the cell 5 and the glass 6 Layer 3 is close to cell sheet 5 and outer layer 1 ...

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Abstract

The invention discloses a packaging adhesive film and a solar cell module using the packaging adhesive film, the packaging adhesive film comprises an outer layer, a PO core layer and an inner layer, the outer layer is EVA or EVA/PE, the PO core layer is a polyolefin and/or polyolefin elastomer modified material, and the inner layer is crosslinked EVA. The solar cell module comprises a back plate and a cell piece, the packaging adhesive film is arranged between the back plate and the cell piece, the outer layer of the packaging adhesive film is close to the back plate, and the inner layer of the packaging adhesive film is close to the cell piece. The packaging adhesive film has good binding force with the backboard or the glass, the phenomenon of delaminating of the adhesive film and the glass is avoided, acetic acid is not generated after long-term use, and the PID risk of the assembly is reduced.

Description

technical field [0001] The invention belongs to the technical field of solar cell components, and in particular relates to an encapsulating adhesive film and a solar cell assembly using the encapsulating adhesive film. Background technique [0002] The packaging material of the solar cell module can provide protection for the solar cell module. At present, the widely used packaging material is mainly ethylene-vinyl acetate copolymer (EVA) film, and some POE film of DOW is used. In order to improve the heat resistance and mechanical properties of the film, EVA mostly adopts the method of partial cross-linking. In a long-term high temperature and high humidity environment, the EVA film is easily hydrolyzed, releasing acetic acid to corrode the circuit, resulting in an increase in component resistance and a decrease in power generation; in addition, acetic acid will also react with sodium and calcium salts in the glass to generate free metal ions. The solar cell module and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J7/30C09J123/08C09J123/02C09J123/06C09J11/06H01L31/048
CPCC09J7/10C09J7/30C09J123/0853C09J123/02C09J11/06H01L31/0481H01L31/048C09J2203/322C09J2423/04C09J2423/00C08L2205/02C08L2205/025C08L23/06C08K5/5425C08L23/02Y02E10/50
Inventor 蔡书义焦华
Owner 浙江中聚材料有限公司
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