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Packaging adhesive film for MWT solar cell and preparation method of packaging adhesive film

A technology for solar cells and encapsulation films, applied in circuits, adhesives, photovoltaic power generation, etc., can solve the problems of low shrinkage rate, inability to meet high weather resistance, etc., and achieve the effect of improving key performance

Inactive Publication Date: 2019-12-20
SENSIN NEW MATERIAL BEIJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides an encapsulating adhesive film for MWT solar cells and a preparation method thereof, which are used to solve the problem that the current adhesive film cannot meet the high weather resistance and low shrinkage rate of the encapsulating adhesive film for MWT solar cells

Method used

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  • Packaging adhesive film for MWT solar cell and preparation method of packaging adhesive film
  • Packaging adhesive film for MWT solar cell and preparation method of packaging adhesive film
  • Packaging adhesive film for MWT solar cell and preparation method of packaging adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0021] The raw materials of the encapsulating adhesive film for MWT solar cells described in Examples 1-3 are composed in parts by weight as shown in Table 1:

[0022] Table 1

[0023] components Embodiment 1 (part) Embodiment 1 (part) Embodiment 1 (part) PVB 55 60 70 PA 20 15 10 EVA 10 25 15 main crosslinker 1.0 2.0 1.5 auxiliary crosslinking agent 0.2 0.5 0.3 polyolefin 5 5 5 UV absorber 0.3 0.4 0.5 coupling agent 0.5 0.5 0.5

[0024] Wherein, the VA content of EVA is 31%, and MI (melt index) is about 25g / 10min.

[0025] Wherein, the main cross-linking agent of Examples 1 and 2 is tert-butyl peroxy 2-ethylhexanoate, and the main cross-linking agent of Example 3 is tert-butyl peroxy-isopropyl carbonate.

[0026] Wherein, the co-crosslinking agents of Examples 1, 2 and 3 are all trimethylolpropane trimethacrylate.

[0027] Wherein, the ultraviolet absorbents of Examples 1, 2 and 3 are all bis(...

Embodiment 4

[0032] Embodiment 4 experimental data

[0033] The encapsulating adhesive films made in Examples 1-3 and Comparative Example 1 are subjected to a performance test, and the test results are shown in Table 2:

[0034] Table 2

[0035]

[0036] Through the above experiments, it can be found that, compared with the common EVA adhesive film, the light transmittance of the technical solution provided by the present invention is equivalent to it, and the shrinkage rate, weather resistance and water absorption are all significantly improved.

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Abstract

The invention belongs to the technical field of metal wrap through (MWT) solar cell packaging, and particularly relates to a packaging adhesive film for an MWT solar cell and a preparation method of the packaging adhesive film. The packaging adhesive film is prepared by blending raw materials including PVB, PI, EVA, a main cross-linking agent and an assistant cross-linking agent. The preparation method comprises the steps of mixing the main raw materials, performing extrusion granulation, and performing extrusion calendaring or casting with other auxiliary agents to form the film. According tothe technical solution provided by the invention, the three resin with different effects are mixed and synergized, so that the shrinkage rate of the adhesive film prepared from the composite materialis lower, the accuracy of electroconductive through holes and the stability can be achieved, and key performance such as the weather resistance, water permeability and the like are improved.

Description

technical field [0001] The invention belongs to the technical field of MWT solar cell packaging, and in particular relates to a packaging adhesive film for MWT solar cells and a preparation method thereof. Background technique [0002] MWT (Metal Wrap Through): Metal Wrap Through is used in solar cells. Compared with conventional solar cells, its biggest feature is to omit the main grid line that collects current on the front side, and form through holes on the battery substrate to emit The electrode generates current under the light, which is collected by the thin grid line on the front of the battery, and the collected current is guided to the positive and negative electrodes on the back through the positive silver electrode in the hole (both the positive silver electrode and the Al back field are on the back of the battery). Due to the omission of the busbar, the use of silver paste can be saved, thereby saving costs; in addition, the removal of the busbar increases the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/14C09J177/00C09J123/08C09J123/00C09J11/06C09J7/10H01L31/048
CPCC08L2205/035C09J11/06C09J129/14C09J7/10H01L31/0481C08L77/00C08L23/0853C08L23/00C08K5/14C08K5/544C08K5/3435Y02E10/50
Inventor 唐超李华
Owner SENSIN NEW MATERIAL BEIJING TECH