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Method for recovering crystalline silicon cell plate in double-glass solar cell assembly with PVB interbed

A technology for solar cells and crystalline silicon cells, applied in the fields of electronic waste recycling, electrical components, recycling technology, etc., can solve the problems of double-glass solar module waste, economic losses, and increased manufacturing costs.

Active Publication Date: 2010-06-02
WUJIANG GOLDEN GLASS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Large-area solar modules are usually used as building curtain walls. Double-glass solar modules need to meet the requirements of power generation function and architectural appearance at the same time. Due to roads and other reasons, the modules cannot be used in buildings and become waste products; double-glass solar modules used in buildings will be waste due to the demolition and transformation of buildings
For these unusable components, if they are not recycled, a large amount of crystalline silicon cells will be wasted, which will also cause a substantial increase in manufacturing costs and economic losses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The waste components produced during production have the structure: 8mm (thickness) upper layer glass + PVB interlayer + crystalline silicon cell + PVB interlayer + 8mm lower glass.

[0015] Place the above-mentioned solar cell module on the support frame in the heating chamber, adjust the support angle to 45°, heat the temperature in the heating chamber to 170°C, and after 3 hours of heat preservation, the PVB material will melt, and after the upper layer of glass is removed, the temperature of the heating furnace will be lowered. After cooling to room temperature, the remaining part was soaked in tetrahydrofuran at room temperature for 48 hours. PVB was completely or partially dissolved and separated from the cell. The cell was taken out and dried for reuse.

Embodiment 2

[0017] The waste components in production have a structure of 6mm upper glass + PVB interlayer + crystalline silicon cell + PVB interlayer + 6mm lower glass.

[0018] Place the above components on the support frame in the heating furnace, adjust the support angle to 60°, heat the temperature in the heating chamber to 150°C, keep it warm for 2 hours, remove the upper glass, cool the temperature of the heating furnace to room temperature, and take it away Put the upper layer of glass, and place the remaining part in tetrahydrofuran at 30°C. After soaking for 48 hours, the PVB will be separated from the cell, and the cell will be taken out. It can be reused after drying.

Embodiment 3

[0020] The waste components in production have a structure of 10mm upper glass + PVB interlayer + crystalline silicon cell + PVB interlayer + 10mm lower glass.

[0021] Place the above components on the support frame in the heating furnace, adjust the support angle to 30°, heat the temperature in the heating chamber to 200°C, keep it warm for 3 hours, remove the upper glass, cool the temperature of the heating furnace to room temperature, and take it away For the upper layer of glass, soak the remaining part in acetone containing 5% (volume) moisture at 60°C. After soaking for 24 hours, the PVB will be separated from the cell, and the cell can be reused after drying.

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PUM

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Abstract

The invention discloses a method for recovering a crystalline silicon cell plate in a double-glass solar cell assembly with a PVB interbed under the condition of no damage to a crystalline silicon cell. The recovering method comprises the following steps of: placing the double-glass solar cell assembly with the PVB interbed on a supporting frame; heating; thermal insulating; after the PVB interbed is molten completely or partially, removing an upper layer of glass from the assembly; cooling the assembly the upper layer of glass of which is removed; placing the assembly into a solvent for soaking and enabling the crystalline silicon cell plate to separate from PVB glue; taking out the cell plate; washing; and drying to obtain the reusable crystalline silicon cell plate.

Description

technical field [0001] The invention relates to a recycling method for waste articles, in particular to a recycling method for silicon cells in double-glass solar modules with PVB interlayers. Background technique [0002] With the rapid development of the economy, my country's demand for energy is increasing, and energy has brought huge pressure on my country's economic development in the short term. In this form, my country has vigorously developed various types of clean energy, such as solar energy, wind energy and Water energy, etc., especially vigorously develop solar energy, and the building integrated solar energy (BIPV) that has been vigorously promoted at home and abroad in recent years has brought the development of solar energy to a climax. [0003] The solar power generation module used by BIPV is a double-glass solar module, the front and back are glass layers, and there is a polyvinyl butyral resin (PVB) interlayer in the middle, and the crystalline silicon cell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18B09B5/00B09B3/00
CPCY02P70/50Y02W30/20Y02W30/82
Inventor 庄大建邱速希郑鸿生肖坚伟
Owner WUJIANG GOLDEN GLASS TECH
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