CN103928574A - Processing method for removing oxide on the surfaces of silver electrodes of polycrystalline solar battery - Google Patents
Processing method for removing oxide on the surfaces of silver electrodes of polycrystalline solar battery Download PDFInfo
- Publication number
- CN103928574A CN103928574A CN201410176868.7A CN201410176868A CN103928574A CN 103928574 A CN103928574 A CN 103928574A CN 201410176868 A CN201410176868 A CN 201410176868A CN 103928574 A CN103928574 A CN 103928574A
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- CN
- China
- Prior art keywords
- silver electrode
- processing method
- sintering
- sintering furnace
- electrode surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 38
- 239000004332 silver Substances 0.000 title claims abstract description 38
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- 238000005245 sintering Methods 0.000 claims abstract description 35
- 238000003303 reheating Methods 0.000 claims description 16
- 206010023126 Jaundice Diseases 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052802 copper Inorganic materials 0.000 abstract description 7
- 239000010949 copper Substances 0.000 abstract description 7
- 238000004383 yellowing Methods 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 12
- 230000001070 adhesive effect Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 8
- 238000006731 degradation reaction Methods 0.000 description 8
- 239000004411 aluminium Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000008216 herbs Nutrition 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
-
- 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 discloses a processing method for removing oxide on the surfaces of silver electrodes of a polycrystalline solar battery. The processing method comprises the steps that yellowing battery pieces on the surface of the silver electrode on the front surface and/or on the surface of the silver electrode on the back surface are selected out and classified; the front surfaces of the battery pieces are downward, and the back surfaces of the battery pieces are upward; the battery pieces are continuously placed in a Despatch sintering furnace at an equal interval to be sintered again. A first temperature area and a second temperature area of a sintering area of the sintering furnace are set as 520-560 DEG C, a third temperature area, a fourth temperature and a fifth temperature area are set as 600 DEG C, a six temperature area is set as 680-700 DEG C, and a sintering tape speed is set as 4.8-5 m/min. The processing method can effectively remove the oxide on the surfaces, guarantees that the attaching force of welding of tinned copper tape meets the requirements, is scientific, reasonable, easy and feasible, and has obvious advantages.
Description
Technical field
The invention belongs to polycrystalline solar cell technical field, particularly relate to a kind of processing method of removing polycrystalline solar cell silver electrode oxide.
Background technology
The production process of tradition polycrystalline solar cell is mainly: making herbs into wool, diffusion, wet etching, PE plated film, printed back electrode, oven dry, printed back electric field, oven dry, printing front electrode, sintering and testing, sorting.Wherein printed back electrode and printing front electrode operation are that appropriate slurry is positioned on silk screen, with scraper, smear silver paste, make its uniform filling among mesh, scraper is expressed to slurry on silicon chip by screen mesh in mobile process, after being completed for printing, silicon chip is placed into drying oven and dries by sintering in high temperature furnace, forms front electrode in the front of solar cell (towards the one side of the sun), at the back side of solar cell, forms backplate.When assembly is produced, welding is welded in front electrode of solar battery and backplate, and the solar battery sheet after a plurality of welding just, backplate is connected and after lamination, form solar module.
Solar cell front and back silver electrode are placed easily oxidation in natural environment, cause electrode surface jaundice, affect finished product outward appearance and components welding adhesive force.Because the design service life of solar components is about 25 years, and assembly is arranged on open air conventionally, will bear the variations in temperature of tens degrees Celsius every day, and welding base material is fine copper, the coefficient of expansion of copper is about 6 times of silicon (cell piece), as long as there is variations in temperature, welding and cell piece all can be stressed, so solder attachment power can cause component failures when not enough.
Solar cell front and back silver electrode are placed and oxidized in natural environment, cause electrode surface jaundice, affect the problem of tin-coated copper strip solder attachment power, are the technical problems that must effectively solve that solar cell manufacturing generally runs into.
Summary of the invention
The present invention is directed to the problem that above-mentioned prior art exists, a kind of processing method of removing polycrystalline solar cell silver electrode surface oxide has been proposed, the silver electrode surface color that guarantees polycrystalline solar cell is qualified, reduce cell piece degradation rate, the adhesive force when guaranteeing polycrystalline solar cell back silver electrode, the welding of positive silver electrode is qualified.
The technical scheme that technical solution problem of the present invention is taked is that a kind of processing method of removing polycrystalline solar cell silver electrode surface oxide, is characterized in that, comprises following steps:
The first step: by the out also classification of the cell piece go-on-go of positive silver electrode surface jaundice and/or the jaundice of back silver electrode surface;
Second step: the cell piece of out also being classified by first step go-on-go is placed upward with the face down back side;
The 3rd step: the cell piece that second step is placed upward with the face down back side is uniformly-spaced put into continuously sintering furnace and carried out reheating processing.
As preferably, described sintering furnace sintering zone the 1st, 2 warm areas are set as 520 ~ 560 ℃, and the 3rd to 5 warm areas are set as 600 ℃, and the 6th warm area is set as 680 ~ 700 ℃, and sintering belt speed is set as 4.8 ~ 5m/min.
As preferably, described sintering furnace is Despatch sintering furnace.
Adopt the inventive method, the cell piece of positive silver electrode surface jaundice and/or the jaundice of back silver electrode surface is put into sintering furnace and carry out reheating processing, can remove silver electrode surface oxide, the silver electrode surface color that guarantees polycrystalline solar cell is qualified, reduce cell piece degradation rate, thereby the adhesive force while guaranteeing polycrystalline solar cell welding is qualified.The setting of sintering furnace sintering zone temperature and the setting of sintering belt speed, these improved reheating parameters can solve the problem that back surface field easily produces aluminium bud well, avoid polycrystalline solar cell outward appearance degradation.
The present invention, by the cell piece of silver electrode surface jaundice is carried out to reheating processing, has effectively removed oxide on surface, guarantees that the adhesive force of tin-coated copper strip welding reaches the requirement of regulation; Methodological science is reasonable, simple possible, has significant good effect.
Accompanying drawing explanation
Fig. 1 is the setting sintering curre of Despatch sintering furnace during cell piece reheating in the inventive method.
Fig. 2 is cell piece reheating time surface actual temperature curve in the inventive method.
Embodiment
Below in conjunction with accompanying drawing, technical solution of the present invention is elaborated.
First carry out outward appearance and select, by the out also classification of the cell piece go-on-go of positive silver electrode jaundice and/or the jaundice of back silver electrode; Then the cell piece of having classified is supine towards placement with the face down back of the body; Again these cell pieces are uniformly-spaced put into sintering furnace continuously and carry out reheating processing.Sintering furnace baking zone Temperature Setting is 380 ~ 420 ℃, and sintering furnace sintering zone the 1st, 2 warm areas are set as 520 ~ 560 ℃, and the 3rd to 5 warm areas are set as 600 ℃, and the 6th warm area is set as 680 ~ 700 ℃, and sintering belt speed is set as 4.8 ~ 5m/min.To completing the solar battery silver electrode adhesion of reheating, test by the following method.
Solar battery silver electrodes force test method is: 350 ℃ ± 20 ℃ of tin-coated copper strip, no-clean scaling powder, 150W electric iron, solder horn temperature that use coating is the thick 0.23mm of 60%Sn40%Pb, heating time (2 ~ 3) s, tin-coated copper strip is welded in battery silver electrode, observes its solderability.Then the cell piece welding is fixed on fixture, direction of pull becomes 180 ° with silicon chip, with horizontal puller system, at the uniform velocity peel off, and records the size of its welding value of thrust, and when value of thrust is greater than 2.5N, silver electrode adhesive force is qualified.
Embodiment 1:
This experiment is by the polycrystalline solar cell of a collection of back silver electrode and the jaundice of positive silver electrode, Despatch sintering furnace is uniformly-spaced put at the face down back side upward, sintering furnace setting parameter is: belt speed 4.8m/min, the temperature in baking zone the 1st, 2,3 districts is set as respectively 380 ℃, 400 ℃, 420 ℃, and the temperature in the 1st, 2,3,4,5,6 districts, sintering zone is set as respectively 520 ℃, 560 ℃, 600 ℃, 600 ℃, 600 ℃, 680 ℃.Through verification test, the finished product aluminium bud degradation after reheating and adhesive force situation are as table 1.Experimental result shows: adopt the silver electrode surface color after the inventive method reheating qualified, adhesive force during welding is qualified.
Table 1: finished product aluminium bud degradation and adhesive force situation after reheating
| Solar cell types | Aluminium bud degradation rate (%) | Adhesive force (N) |
| Solar cell after the inventive method reheating | 0 | 2.8~3.5 |
Embodiment 2:
This experiment is by the polycrystalline solar cell of a collection of back silver electrode and the jaundice of positive silver electrode, Despatch sintering furnace is uniformly-spaced put at the face down back side upward, sintering furnace setting parameter is: belt speed 5m/min, the temperature in baking zone the 1st, 2,3 districts is set as respectively 380 ℃, 400 ℃, 420 ℃, and the temperature in the 1st, 2,3,4,5,6 districts, sintering zone is set as respectively 520 ℃, 560 ℃, 600 ℃, 600 ℃, 600 ℃, 700 ℃.Through verification test, the finished product aluminium bud degradation after reheating and adhesive force situation are as table 2.Experimental result shows: adopt the silver electrode surface color after the inventive method reheating qualified, adhesive force during welding is qualified.
Table 2:
| Solar cell types | Aluminium bud degradation rate (%) | Adhesive force (N) |
| Solar cell after the inventive method reheating | 0 | 2.7~3.6 |
Claims (3)
1. a processing method of removing polycrystalline solar cell silver electrode surface oxide, is characterized in that, comprises following steps:
The first step: by the out also classification of the cell piece go-on-go of positive silver electrode surface jaundice and/or the jaundice of back silver electrode surface;
Second step: the cell piece of out also being classified by first step go-on-go is placed upward with the face down back side;
The 3rd step: the cell piece that second step is placed upward with the face down back side is uniformly-spaced put into continuously sintering furnace and carried out reheating processing.
2. the processing method of removal polycrystalline solar cell silver electrode surface oxide according to claim 1, it is characterized in that, described sintering furnace sintering zone the 1st, 2 warm areas are set as 520 ~ 560 ℃, the 3rd to 5 warm areas are set as 600 ℃, the 6th warm area is set as 680 ~ 700 ℃, and sintering belt speed is set as 4.8 ~ 5m/min.
3. the processing method of removal polycrystalline solar cell silver electrode surface oxide according to claim 1 and 2, is characterized in that, described sintering furnace is Despatch sintering furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410176868.7A CN103928574A (en) | 2014-04-29 | 2014-04-29 | Processing method for removing oxide on the surfaces of silver electrodes of polycrystalline solar battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410176868.7A CN103928574A (en) | 2014-04-29 | 2014-04-29 | Processing method for removing oxide on the surfaces of silver electrodes of polycrystalline solar battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103928574A true CN103928574A (en) | 2014-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410176868.7A Pending CN103928574A (en) | 2014-04-29 | 2014-04-29 | Processing method for removing oxide on the surfaces of silver electrodes of polycrystalline solar battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103928574A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137276A (en) * | 2018-02-09 | 2019-08-16 | 张陆成 | The device and method for repairing solar battery |
| CN113178508A (en) * | 2021-05-28 | 2021-07-27 | 浙江爱旭太阳能科技有限公司 | Heat treatment method and system for improving acetic acid corrosion resistance of solar cell |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881768A (en) * | 2012-09-19 | 2013-01-16 | 江苏荣马新能源有限公司 | Crystal silicon solar battery electrode vulcanization processing method |
| KR101280489B1 (en) * | 2007-05-09 | 2013-07-01 | 주식회사 동진쎄미켐 | A paste for producing electrode of solar cell |
| CN103187483A (en) * | 2013-03-29 | 2013-07-03 | 衡水英利新能源有限公司 | Method for preparing emitter by lightly doping silver paste |
-
2014
- 2014-04-29 CN CN201410176868.7A patent/CN103928574A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101280489B1 (en) * | 2007-05-09 | 2013-07-01 | 주식회사 동진쎄미켐 | A paste for producing electrode of solar cell |
| CN102881768A (en) * | 2012-09-19 | 2013-01-16 | 江苏荣马新能源有限公司 | Crystal silicon solar battery electrode vulcanization processing method |
| CN103187483A (en) * | 2013-03-29 | 2013-07-03 | 衡水英利新能源有限公司 | Method for preparing emitter by lightly doping silver paste |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137276A (en) * | 2018-02-09 | 2019-08-16 | 张陆成 | The device and method for repairing solar battery |
| CN113178508A (en) * | 2021-05-28 | 2021-07-27 | 浙江爱旭太阳能科技有限公司 | Heat treatment method and system for improving acetic acid corrosion resistance of solar cell |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20140716 |