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A method for recycling flexible solar modules

A technology of a solar module and a recycling method, applied in the field of photovoltaic materials, can solve the problems of generating hydrogen fluoride gas, polluting the environment, low efficiency, etc., and achieve the effects of high recycling efficiency, simple operation and low cost

Active Publication Date: 2017-09-05
HANERGY MOBILE ENERGY HLDG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods not only have low efficiency and high energy consumption, but also if the front plate of the flexible component contains fluorine, hydrogen fluoride gas will be produced after incineration, which seriously pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Follow the steps below to recycle the flexible CIGS solar modules with stainless steel substrates:

[0024] 1) Cryogenic separation: place the flexible solar module to be recovered in the furnace cavity of a cryogenic device using liquid nitrogen as a cold source, and immerse the flexible copper indium gallium selenium solar module in liquid nitrogen for 2 minutes. After taking it out, the The copper indium gallium selenide flexible solar module has become hard and brittle, and the chip of the flexible copper indium gallium selenide solar module is separated from the front plate, adhesive film and back plate by mechanical or manual methods;

[0025] 2) Separation of coating material: the copper indium gallium selenium coating material on the chip is separated from the stainless steel substrate by dry sandblasting, wherein the abrasive used in the dry sandblasting is quartz sand, and the Carry out under the environment of 2 atmospheric pressures, obtain the to-be-enriche...

Embodiment 2

[0028] Follow the steps below to recycle the flexible copper indium gallium selenide solar modules on polyimide substrates to be recycled:

[0029] 1) Cryogenic separation: place the flexible solar modules to be recovered in the furnace chamber of a cryogenic equipment with liquid nitrogen as the cold source, set the cooling temperature to -180°C, and make the flexible copper indium gallium selenide solar modules Keep it warm at this temperature for 10 minutes. After taking it out, the copper indium gallium selenide flexible solar module has become hard and brittle. By mechanical or manual methods, the chip of the flexible copper indium gallium selenide solar module and the front plate, adhesive Membrane and backplane are separated;

[0030] 2) Separation of coating materials: using acid leaching, the copper indium gallium selenium coating material on the chip is dissolved and separated from the polyimide substrate to obtain copper indium gallium selenide acid dipping solution...

Embodiment 3

[0033] Follow the steps below to recycle the flexible gallium arsenide solar modules on germanium single crystal substrates to be recycled:

[0034] 1) Cryogenic separation: place the flexible solar module to be recovered in the furnace chamber of a cryogenic device using liquid nitrogen as a cold source, make the flexible copper indium gallium selenium solar module pass through the liquid nitrogen pool at a uniform speed, The passage time is 20 minutes. After taking it out, the flexible gallium arsenide solar module has become hard and brittle. By mechanical or manual methods, the chip of the flexible gallium arsenide solar module and the front plate, adhesive film, The backplane is separated;

[0035] 2) Separation of coating materials: the gallium arsenide coating material on the chip is separated from the germanium substrate by acid leaching with 10wt% dilute sulfuric acid to obtain arsenic and gallium-containing acid dipping solution and germanium single crystal substrate...

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PUM

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Abstract

The invention relates to a recovery method of a flexible solar assembly. The method comprises the steps including cryogenic separation, coating material separation and coating material gathering successively. According to the method, a chip of the solar assembly is separated from other layers in the cryogenic method, the problem that a coating material on the recovery chip is hard to separate from materials of the other layers or is hard to recover after separation in the prior art is solved, and the high-value material in the flexible solar assembly can be recovered at low cost; The recovery method is simple in steps, low in operation difficulty, low in comprehensive cost, high in recovery efficiency, friendly to the environment and wide in application prospects.

Description

technical field [0001] The invention belongs to the field of photovoltaic materials. Background technique [0002] With the rapid development of the solar cell industry, the total output of solar modules has also increased rapidly. However, with the increase in the service life of solar cells, inferred from the service life of solar photovoltaic modules, in the near future, there will be a large number of photovoltaic Modules are scrapped, and in the production process of solar modules, there will also be defective products. Therefore, the issue of solar module recycling is on the agenda. [0003] Silicon or metals such as indium, gallium, cadmium, and titanium are usually used in flexible solar modules, some of which are expensive, and some will bring great pollution to the environment if the modules are not recycled properly after they are scrapped. However, flexible solar modules are multi-layer composite structures. Due to the requirements of solar modules for weather ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/18H01G9/20
CPCY02P70/50
Inventor 王玉晓吴国发马康陈涛林俊荣王波
Owner HANERGY MOBILE ENERGY HLDG GRP CO LTD
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