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Black photovoltaic cell PO backboard processing technology and device

A technology for photovoltaic cells and processing devices, applied in the field of solar cells, can solve the problems of increasing the difficulty of layer-to-layer combination, affecting the cost of photovoltaic electricity prices, and stress concentration between layers and layers, achieving smoothness, good bonding performance, and improved The effect of power generation efficiency

Active Publication Date: 2021-11-30
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

It is usually composed of three layers of film, but the main components of each layer are different. On the one hand, it will increase the difficulty of bonding between layers during the molding process. On the other hand, due to the different thermal expansion coefficients of the components between different layers, it is easy to cause Stress concentration occurs between layers, resulting in delamination or even cracking
At the same time, the existing solar cells are mainly crystalline silicon solar energy, and the power generation efficiency has been in the range of 13-15%, which affects the electricity price cost of photovoltaics. Therefore, it is urgent to improve the reflectivity of the back of the module to improve the power generation efficiency

Method used

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  • Black photovoltaic cell PO backboard processing technology and device
  • Black photovoltaic cell PO backboard processing technology and device
  • Black photovoltaic cell PO backboard processing technology and device

Examples

Experimental program
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Effect test

Embodiment 1

[0051] A kind of processing technology of black photovoltaic battery PO backboard, black photovoltaic battery PO backplane comprises two layers of PO structure layer and one PO bonding layer, and PO bonding layer is arranged between two layers of PO structure layer, and PO structure layer and The PO tie layer is integrally formed through a co-extrusion device, which includes the following steps:

[0052] S1. Mix 50 parts of LDPE, 20 parts of PP, 10 parts of EVA, 0.2 parts of crosslinking agent, 0.1 part of coupling agent, 0.01 part of light stabilizer, and 0.1 part of antioxidant in a high-speed mixer, and then extrude through a single screw. Perform melting reaction in the machine, extrude and granulate to obtain PO structure layer particles;

[0053] S2, will include 70 parts of LDPE, 30 parts of PP, 500 parts of EVA, 0.5 parts of crosslinking agent, 0.2-4 parts of coupling agent, 0.01 part of light stabilizer, 0.1 part of antioxidant, 10 parts of lanthanum oxide, 5 parts of...

Embodiment 2

[0056] A kind of processing technology of black photovoltaic battery PO backboard, black photovoltaic battery PO backplane comprises two layers of PO structure layer and one PO bonding layer, and PO bonding layer is arranged between two layers of PO structure layer, and PO structure layer and The PO tie layer is integrally formed through a co-extrusion device, which includes the following steps:

[0057] S1. Mix 65 parts of LDPE, 40 parts of PP, 12 parts of EVA, 3 parts of crosslinking agent, 2 parts of coupling agent, 0.25 parts of light stabilizer, and 1.2 parts of antioxidant in a high-speed mixer, and then extrude through a single screw. Perform melting reaction in the machine, extrude and granulate to obtain PO structure layer particles;

[0058] S2, will include 80 parts of LDPE, 40 parts of PP, 18 parts of EVA, 2.5 parts of crosslinking agent, 2 parts of coupling agent, 0.25 parts of light stabilizer, 1.5 parts of antioxidant, 13 parts of titanium dioxide, 2 parts of ir...

Embodiment 3

[0061] A kind of processing technology of black photovoltaic battery PO backboard, black photovoltaic battery PO backplane comprises two layers of PO structure layer and one PO bonding layer, and PO bonding layer is arranged between two layers of PO structure layer, and PO structure layer and The PO tie layer is integrally formed through a co-extrusion device, which includes the following steps:

[0062] S1. Mix 80 parts of LDPE, 50 parts of PP, 15 parts of EVA, 5 parts of crosslinking agent, 3 parts of coupling agent, 0.5 parts of light stabilizer, and 2 parts of antioxidant in a high-speed mixer, and then extrude through a single screw. Perform melting reaction in the machine, extrude and granulate to obtain PO structure layer particles;

[0063] S2, will include 90 parts of LDPE, 50 parts of PP, 20 parts of EVA, 5 parts of crosslinking agent, 4 parts of coupling agent, 0.5 parts of light stabilizer, 2 parts of antioxidant, 15 parts of terbium oxide, and 5 parts of copper ch...

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Abstract

The invention discloses a black photovoltaic cell PO backboard processing technology and device. The black photovoltaic cell PO backboard processing technology specifically comprises the following steps of S1, uniformly mixing LDPE, PP, EVA, a cross-linking agent, a coupling agent, a light stabilizer and an antioxidant through a high-speed mixer, carrying out a melting reaction in a single-screw extruder, and carrying out extrusion and granulation to obtain PO structure layer particles; S2, uniformly mixing the LDPE, the PP, the EVA, the cross-linking agent, the coupling agent, the light stabilizer, the antioxidant, a filler and a black pigment through the high-speed mixer, carrying out the melting reaction in a single-screw extruder, and carrying out extrusion and granulation to obtain PO bonding layer particles; and S3, adding the PO structure layer particles and the PO bonding layer particles into a co-extrusion device for extrusion molding. A black photovoltaic cell PO backboard is formed by co-extrusion of two PO structural layers and a PO bonding layer, the process is simple, and the black photovoltaic cell PO backboard has good bonding performance and aging resistance and has high spectral reflectivity of a near-infrared band.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a processing technology and device for a PO backboard of a black photovoltaic cell. Background technique [0002] A solar cell is a kind of photoelectric semiconductor sheet that uses sunlight to generate electricity directly. It has the advantages of environmental protection, sustainability, long life, abundant production materials, and simple structure. Solar cells are mainly composed of tempered glass, EVA, battery sheets, backplanes and junction boxes, among which the backplane of solar cells is an important part of the structure of solar photovoltaic cells, which plays a role in supporting, insulating and protecting solar photovoltaic cells. [0003] Solar battery backsheet products mainly include thin-film composite type and paint-coated type, but currently the thin-film composite solar cell backsheet is the main one in the market. It is usually composed of three layers of film,...

Claims

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Application Information

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IPC IPC(8): B29C48/00B29C48/07B29C48/18B29C48/305B29C48/88B29C48/285B29C48/355C08L23/06C08L23/12C08L23/08B29L31/34B29K23/00B29K105/00
CPCB29C48/0022B29C48/0021B29C48/07B29C48/022B29C48/18B29C48/305B29C48/9135B29C48/919B29C48/288B29C48/355C08L23/06C08L2203/204B29L2031/3468B29K2023/0633B29K2023/083B29K2023/12B29K2105/0005B29K2105/0044C08L23/12C08L23/0853
Inventor 蔡书义焦华
Owner 浙江中聚材料有限公司
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