CN102623550B - Method for treating high-series-resistance inefficient battery - Google Patents
Method for treating high-series-resistance inefficient battery Download PDFInfo
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- CN102623550B CN102623550B CN201210006282.7A CN201210006282A CN102623550B CN 102623550 B CN102623550 B CN 102623550B CN 201210006282 A CN201210006282 A CN 201210006282A CN 102623550 B CN102623550 B CN 102623550B
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- inefficient
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to a method for treating high-series-resistance inefficient battery. The method includes the steps: activating a positive electrode of the inefficient battery by the aid of hydrofluoric acid water solution with the volume concentration of 0.1-3%; cleaning the positive electrode of the inefficient battery by the aid of deionized water; protecting the surface of the positive electrode of the inefficient battery by means of chemically plating a metal layer; cleaning the battery by the aid of the deionized water and drying the battery; and removing the redundant metal layer at the edge of the battery. By the aid of the chemical method for treatment, the series resistance of the inefficient battery can be effectively reduced, conversion efficiency is improved, production cost is reduced, and loss caused by the inefficient battery is decreased.
Description
Technical field
The present invention relates to a kind of method processing high series resistance efficiency battery, belong to cell art.
Background technology
At present, in order to increase the short wave response of crystal silicon battery to light, improve the photoelectric transformation efficiency of battery, manufacturing enterprise is all at the diffused sheet resistance little by little improving battery.But the method for raising the efficiency simply by raising diffused sheet resistance also also exists some shortcomings: one is that high square resistance easily causes positive silver grating line bad with the Ohmic contact of silicon substrate, makes cell series resistance excessive, reduces battery fill factor, curve factor and conversion efficiency; Even if two is that high square resistance technique can effectively be raised the efficiency, the fluctuation of explained hereafter also easily causes producing the excessive poor efficiency sheet of series resistance.On the other hand, diffused sheet resistance improves, and the window of sintering diminishes, and easily causes cell piece underburnt or burning, also can produce the poor efficiency sheet that series resistance is excessive.Well imagine, along with the progressively popularization of high square resistance technique, fluctuated by sheet resistance or sinter the high series resistance poor efficiency sheet that causes even inefficacy sheet will increase gradually, the very large wasting of resources and cost allowance will be caused like this.Therefore, the problem that these high series resistance poor efficiency sheets or inefficacy sheet have just become a necessary solution how is processed.
Application number is the processing method that the Chinese patent of 201010569724.X discloses a kind of poor efficiency solar battery sheet, comprises and filter out poor efficiency solar battery sheet from finished product solar battery sheet; The described poor efficiency solar battery sheet filtered out is put into annealing furnace and carries out hydrogen annealing.This inventive embodiments, by adopting hydrogen to anneal to efficiency battery sheet, due to the oxide at the enough electrode places, reducing metal of Hydrogen Energy, reduces the contact resistance of metal electrode and silicon, thus reduces total series resistance of efficiency battery sheet.This kind of method is higher to annealing process operation requirements, and hydrogen reducing operational danger is very large, and the cell piece of hydrogen reducing annealing in process is unstable, and after tropical deterioration process, series resistance also can increase again.
Summary of the invention
The object of the invention is to raise for sheet resistance the high series resistance poor efficiency sheet or inefficacy sheet problem that bring, and a kind of method processing high series resistance efficiency battery is provided.This method, by chemical method process efficiency battery sheet, can well reduce its series resistance, improve its conversion efficiency, reduces production cost, reduces the loss that poor efficiency sheet brings.In addition, in order to ensure the stability of cell piece after chemical treatment, again electroless metal layer conservation treatment having been carried out to it, having improve the stability of cell piece.
The technical scheme that the present invention takes is:
Process a method for high series resistance efficiency battery, comprise step as follows:
(1) by volumetric concentration be 0.1 ~ 3% hydrofluoric acid aqueous solution activation process is carried out to efficiency battery positive electrode;
(2) washed with de-ionized water cell positive electrode is used again;
(3), after cleaning is dried, electroless metal layer conservation treatment is carried out to cell positive electrode surface;
(4) washed with de-ionized water, oven dry battery;
(5) battery edge excess metal layer is removed.
Efficiency battery described in said method is monocrystalline silicon battery or polycrystal silicon cell, and series resistance is greater than 1.5 Ω cm
2.
The time of activation process described in step (1) is 0.5 ~ 5min.
Electroless metal layer described in step (3) is chemical Ni-plating layer or chemical plating silver layer, and thickness of coating is 0.5 ~ 5 μm.
Described chemical Ni-plating layer bath concentration used consists of: 20 ~ 40g/L nickelous sulfate, 10 ~ 20g/L inferior sodium phosphate, 70 ~ 90g/L natrium citricum, 40 ~ 60g/L ammonium chloride, 50 ~ 70g/L ammoniacal liquor.The bath concentration that described chemical plating silver layer is used consists of: 60 ~ 90g/L silver nitrate, 200 ~ 400g/L sodium thiosulfate, 5 ~ 15g/L sodium sulphate, 60 ~ 90g/L sodium pyrosulfite, 20 ~ 40g/L boric acid.
Bake out temperature described in step (4) is 80 ~ 100 DEG C.
The method of the removal excess metal layer described in step (5) is laser or mechanical removal method.
The invention has the beneficial effects as follows: after high series resistance poor efficiency sheet is carried out hydrofluoric acid activation process, cell series resistance can effectively reduce, fill factor, curve factor improves, and battery conversion efficiency is well improved; Again battery is carried out chemical nickel plating or silver layer process, effectively can ensure the stability activating rear battery, avoid that battery is subject to the impact of external environment and series electrical resistive is large again.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.But they are not construed as limiting the invention.
Embodiment 1:
The poor efficiency Monocrystalline silicon cell piece positive electrode of high series resistance is immersed in the hydrofluoric acid aqueous solution of volumetric concentration 0.1% and clean 2 minutes; Taking-up washed with de-ionized water; And then cell positive electrode immersed in chemical nickel-plating solution carry out nickel plating, chemical nickel-plating liquid concentration forms: 30g/L nickelous sulfate, 15g/L inferior sodium phosphate, 80g/L natrium citricum, 50g/L ammonium chloride, 60g/L ammoniacal liquor, and nickel layer thickness is 5 μm; Take out cell piece, washing, oven dry; The unnecessary nickel coating in edge is removed in polishing.Before and after process, comparing result is as follows:
Electrical property comparing result before and after the process of table 1 battery chemistries
Embodiment 2:
The poor efficiency polycrystalline silicon battery plate positive electrode of high series resistance is immersed in the hydrofluoric acid aqueous solution of volumetric concentration 3% and clean 30 seconds; Taking-up washed with de-ionized water; And then cell positive electrode immersed carry out silver-plated in chemical silvering solution, silver plating liquid concentration forms: the allotment of 80g/L silver nitrate, 300g/L sodium thiosulfate, 10g/L sodium sulphate, 80g/L sodium pyrosulfite, 30g/L boric acid is made, and silver thickness is 0.5 μm; Take out, washing, oven dry; With the unnecessary silver coating in laser ablation edge.Before and after process, comparing result is as follows:
Electrical property comparing result before and after the process of table 2 battery chemistries
As mentioned above, embodiments of the invention are explained, but as long as do not depart from inventive point of the present invention in fact and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation is also all included within protection scope of the present invention.
Claims (2)
1. process a method for high series resistance efficiency battery, it is characterized in that, comprise step as follows:
(1) by volumetric concentration be 0.1 ~ 3% hydrofluoric acid aqueous solution activation process is carried out to efficiency battery positive electrode;
(2) washed with de-ionized water cell positive electrode is used again;
(3), after cleaning is dried, electroless metal layer conservation treatment is carried out to cell positive electrode surface; Described electroless metal layer is chemical Ni-plating layer or chemical plating silver layer, and thickness of coating is 0.5 ~ 5 μm; Described chemical Ni-plating layer bath concentration used consists of: 20 ~ 40g/L nickelous sulfate, 10 ~ 20g/L inferior sodium phosphate, 70 ~ 90g/L natrium citricum, 40 ~ 60g/L ammonium chloride, 50 ~ 70g/L ammoniacal liquor; The bath concentration that described chemical plating silver layer is used consists of: 60 ~ 90g/L silver nitrate, 200 ~ 400g/L sodium thiosulfate, 5 ~ 15g/L sodium sulphate, 60 ~ 90g/L sodium pyrosulfite, 20 ~ 40g/L boric acid;
(4) washed with de-ionized water, oven dry battery;
(5) battery edge excess metal layer is removed.
2. a kind of method processing high series resistance efficiency battery according to claim 1, is characterized in that, in step (1), the time of activation process is 0.5 ~ 5min.
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| CN201210006282.7A CN102623550B (en) | 2012-01-10 | 2012-01-10 | Method for treating high-series-resistance inefficient battery |
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| CN201210006282.7A CN102623550B (en) | 2012-01-10 | 2012-01-10 | Method for treating high-series-resistance inefficient battery |
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| CN102623550A CN102623550A (en) | 2012-08-01 |
| CN102623550B true CN102623550B (en) | 2015-07-08 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299457A (en) * | 2008-05-09 | 2008-11-05 | 华南师范大学 | Method for treating surface of negative electrode cover of mercury-free alkaline zinc-manganese and zinc-silver button cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100154874A1 (en) * | 2008-09-29 | 2010-06-24 | Takashi Hirose | Photoelectric conversion device and manufacturing method thereof |
| CN101781782B (en) * | 2010-04-02 | 2011-07-20 | 宁波舜佳电子有限公司 | Cyanide-free high-speed silver plating electroplating solution |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299457A (en) * | 2008-05-09 | 2008-11-05 | 华南师范大学 | Method for treating surface of negative electrode cover of mercury-free alkaline zinc-manganese and zinc-silver button cell |
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Granted publication date: 20150708 Termination date: 20190110 |