CN202307807U - Recycling system for waste silicon solar cell - Google Patents
Recycling system for waste silicon solar cell Download PDFInfo
- Publication number
- CN202307807U CN202307807U CN2011204250065U CN201120425006U CN202307807U CN 202307807 U CN202307807 U CN 202307807U CN 2011204250065 U CN2011204250065 U CN 2011204250065U CN 201120425006 U CN201120425006 U CN 201120425006U CN 202307807 U CN202307807 U CN 202307807U
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- Prior art keywords
- cell
- silicon solar
- solar cell
- waste
- sheet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]
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- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a recycling system for a waste silicon solar cell. The recycling system comprises a waste cell treatment pond, and is characterized in that: a waste cell and a mixed acidic solution are arranged in the waste cell treatment pond; and a heating system is arranged below the waste cell treatment pond. According to the recycling system for the waste silicon solar cell, silver on the front face, aluminum on the back face and an emission reduction SiNX membrane on the front face can be removed from the sintered cell, and an N type formed by diffusion can be etched off, so that a P type is reduced, and the cell can be reproduced. A low-efficiency cell and a severely cracked cell are retreated, so that the silicon solar cell can be reduced into a silicon slice so as to reproduce a new silicon solar cell. Therefore, the cost is reduced to a certain extent, and the idle utilization rate is increased.
Description
Technical field
The utility model relates to the recycling system of the useless sheet of recycling system, particularly silicon solar cell of the useless sheet of a kind of battery.
Background technology
Silicon solar cell on monocrystalline or polycrystalline substrate through clean, series of process such as surface texture is institutional, diffusion, trimming, plating subtract transmitting film, print electrode, sintering are made, and are a kind of a kind of devices that can conversion of solar energy be become electric energy.At present, in the production process of silicon solar cell sheet, can produce poor efficiency sheet (the battery sheet that conversion efficiency is very low) and more serious colored sheet useless sheets such as (the battery sheets that appearance effects is sold) inevitably.Poor efficiency sheet in the past all can only be pressed in the warehouse with more serious colored sheet, does not know how to handle.Caused the very big waste and the raising of cost like this, thus whether can the poor efficiency sheet heavily handle become we the problem that will consider.
The utility model content
The purpose of the utility model is to provide a kind of can subtract emission SiN to the positive silver of battery sheet after the sintering, back side aluminium and front for the deficiency that solves above-mentioned prior art
XThe recycling system of the useless sheet of the convenient silicon solar cell of removing of film.
To achieve these goals; The recycling system of the useless sheet of the silicon solar cell that the utility model designed; Comprise the battery sheet treatment pond that gives up, it is characterized in that being provided with in the useless sheet treatment pond of said battery useless sheet of battery and mix acid liquor, be provided with heating system below the useless sheet treatment pond of battery; The useless sheet treatment pond of said battery is a sealing system, and said heating system is a water-bath heater.Said mix acid liquor is that concentration ratio is: nitric acid: hydrofluoric acid: the mixed liquor that hydrochloric acid equals 1: 3: 1.
The recycling system of the useless sheet of the silicon solar cell that the utility model obtains, owing to be provided with sealing and heating, the positive silver of battery sheet, back side aluminium and front subtract emission SiN afterwards to make it sintering
XFilm can conveniently be removed, and can etch away the formed N type of diffusion, thereby is reduced into the P type so that carry out the production of battery sheet again.Through to of the again processing of poor efficiency sheet, make the silicon solar cell sheet revert back silicon chip and also can produce the silicon solar cell sheet once more with serious flower sheet.Reduce cost to a certain extent, increased idle utilance.
Description of drawings
Fig. 1 is the structural representation of embodiment.
Among the figure: battery the give up useless sheet 2 of sheet treatment pond 1, battery, mix acid liquor 3, heating system 4.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Embodiment:
As shown in Figure 1; The recycling system of the useless sheet of the silicon solar cell that the utility model provides; Comprise the battery sheet treatment pond 1 that gives up, it is characterized in that being provided with in the useless sheet treatment pond 1 of said battery useless sheet 2 of battery and mix acid liquor 3, be provided with heating system 4 below the useless sheet treatment pond 1 of battery.The useless sheet treatment pond 1 of said battery is a sealing system.Said mix acid liquor 3 is the mixed liquor of 1: 3: 1 nitric acid of concentration ratio, hydrofluoric acid, hydrochloric acid.Said heating system 4 is the water-bath heating.
The concentration ratio of mix acid liquor 3 is a nitric acid: hydrofluoric acid: hydrochloric acid=1: 3: 1, and the water bath system carries out temperature controlling, make that whole course of reaction becomes slowly evenly, and have good adjustability.Nitric acid is that a kind of strong oxidizer can dissolve silver in the mix acid liquor of being joined 3; The existence of chloride ion is arranged in addition; Just having generated in the mix acid liquor 3 a kind ofly has the more material of strong oxidizing property than nitric acid, and the material through this strong oxidizing property can better dissolve the silver grating line and the silver-colored aluminum back electrode of sintering on the battery sheet.Simple and easy chemical equation is following:
Ag+HNO
3+HCl＝＝＝AgCl
3+NO↑+2H
2O
AgCl3+HCl===HAgCl
4(tetrachloro closes silver acid) (salt excessive acid)
In the solution strong oxidizer also can better remove simultaneously the silicon-aluminum that forms after the sintering.The existence of hydrochloric acid has been dissolved back of the body electric field simultaneously and has been generated a large amount of hydrogen in the solution.
Al+HCl=A1C1
3+ H
2↑ (removing aluminium)
The antireflective coating silicon nitride layer is then removed by hydrofluoric acid, and reaction equation is following:
Si
3N
4+ 4HF+9H
2O===3H
2SiO
3(deposition)+4NH
4F (removing silicon nitride).
Claims (1)
1. the recycling system of the useless sheet of a silicon solar cell comprises the battery sheet treatment pond (1) that give up, it is characterized in that being provided with in the useless sheet treatment pond (1) of said battery useless sheet (2) of battery and mix acid liquor (3), and battery gives up and is provided with heating system (4) below the sheet treatment pond (1); The useless sheet treatment pond (1) of said battery is a sealing system, and said heating system (4) is a water-bath heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204250065U CN202307807U (en) | 2011-11-01 | 2011-11-01 | Recycling system for waste silicon solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204250065U CN202307807U (en) | 2011-11-01 | 2011-11-01 | Recycling system for waste silicon solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202307807U true CN202307807U (en) | 2012-07-04 |
Family
ID=46376649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204250065U Expired - Fee Related CN202307807U (en) | 2011-11-01 | 2011-11-01 | Recycling system for waste silicon solar cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202307807U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115117184A (en) * | 2022-06-28 | 2022-09-27 | 河海大学 | Method for determining structure of heterojunction solar cell to be recovered |
-
2011
- 2011-11-01 CN CN2011204250065U patent/CN202307807U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115117184A (en) * | 2022-06-28 | 2022-09-27 | 河海大学 | Method for determining structure of heterojunction solar cell to be recovered |
| CN115117184B (en) * | 2022-06-28 | 2024-04-30 | 河海大学 | Method for determining heterojunction solar cell structure to be recovered |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20121101 |