CN105845756A - Dense grating four-main-grating poly-crystal solar battery back-surface silver paste and preparation method thereof - Google Patents
Dense grating four-main-grating poly-crystal solar battery back-surface silver paste and preparation method thereof Download PDFInfo
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- CN105845756A CN105845756A CN201610341260.4A CN201610341260A CN105845756A CN 105845756 A CN105845756 A CN 105845756A CN 201610341260 A CN201610341260 A CN 201610341260A CN 105845756 A CN105845756 A CN 105845756A
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 57
- 239000004332 silver Substances 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 48
- 239000013078 crystal Substances 0.000 title abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 58
- 239000011521 glass Substances 0.000 claims abstract description 39
- 239000000843 powder Substances 0.000 claims abstract description 25
- 239000002318 adhesion promoter Substances 0.000 claims abstract description 11
- 230000009102 absorption Effects 0.000 claims description 63
- 238000010521 absorption reaction Methods 0.000 claims description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000000428 dust Substances 0.000 claims description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 28
- 239000000377 silicon dioxide Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 238000003801 milling Methods 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 239000012752 auxiliary agent Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- -1 alcohol ester Chemical class 0.000 claims description 11
- 239000006185 dispersion Substances 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000005485 electric heating Methods 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000001856 Ethyl cellulose Substances 0.000 claims description 6
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 6
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 229920001249 ethyl cellulose Polymers 0.000 claims description 6
- 235000019325 ethyl cellulose Nutrition 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 230000008520 organization Effects 0.000 claims description 6
- 229910052682 stishovite Inorganic materials 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 229910052905 tridymite Inorganic materials 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 claims description 4
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 210000003437 trachea Anatomy 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 30
- 229910052710 silicon Inorganic materials 0.000 abstract description 30
- 239000010703 silicon Substances 0.000 abstract description 30
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000009864 tensile test Methods 0.000 abstract description 2
- 239000002912 waste gas Substances 0.000 description 26
- 239000007789 gas Substances 0.000 description 15
- 238000012360 testing method Methods 0.000 description 15
- 239000000853 adhesive Substances 0.000 description 13
- 230000001070 adhesive effect Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 13
- 235000013312 flour Nutrition 0.000 description 11
- 238000003466 welding Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 150000002927 oxygen compounds Chemical class 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000000047 product Substances 0.000 description 7
- 239000000654 additive Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000009466 transformation Effects 0.000 description 6
- 230000032683 aging Effects 0.000 description 5
- 238000007639 printing Methods 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 238000007613 slurry method Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 3
- 241000209094 Oryza Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
- 208000002925 dental caries Diseases 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000008240 homogeneous mixture Substances 0.000 description 3
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- SJWPTBFNZAZFSH-UHFFFAOYSA-N pmpp Chemical compound C1CCSC2=NC=NC3=C2N=CN3CCCN2C(=O)N(C)C(=O)C1=C2 SJWPTBFNZAZFSH-UHFFFAOYSA-N 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- 235000009566 rice Nutrition 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004332 deodorization Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 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
- H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/14—Conductive material dispersed in non-conductive inorganic material
- H01B1/16—Conductive material dispersed in non-conductive inorganic material the conductive material comprising metals or alloys
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a dense grating four-main-grating poly-crystal solar battery back-surface silver paste and a preparation method thereof, and solves the technical problems that after existing slurry is printed and sintered on the surface of a silicon wafer, a battery piece is in a subfissure state, and during tensile test, a silicon base layer can be pulled off and an internal structure of the battery piece is damaged, so that the service life of the battery is reduced, and product quality is poor and the like. The dense grating four-main-grating poly-crystal solar battery back-surface silver paste comprises the following components by mass percent: 30-50% of flake silver powders, 15-25% of nanometer silver powders, 3.5-5.5% of glass powders, 20-35% of organic bonds, 0.1-1.0% of adhesion promoters and 0.5-1.0% of auxiliaries, sum of mass percent of the components above being 100%. The dense grating four-main-grating poly-crystal solar battery back-surface silver paste has the advantage of good product quality.
Description
Technical field
The invention belongs to technical field of solar cells, relate to a kind of close grid four main grid polycrystalline too
Positive electricity pond back silver slurry and preparation method thereof.
Background technology
Day by day serious along with oil, the exhaustion of coal equal energy source and greenhouse effect, people
Class becomes more and more urgent, due to crystal silicon solar batteries to the demand of new cleaning fuel
The feature of environmental protection, obtains in the range of daily life, space flight, military affairs etc.
Fast development.Solar energy crystalline silicon photovoltaic electricity generation system utilizes silion cell quasiconductor
Photovoltaic effect, can be converted directly into a kind of new power generating system of electric energy by solar radiation.
At present, cost and the transformation efficiency of solaode becomes its bottle developed further of restriction
Neck.
A kind of crystal silicon solar energy battery back of the body is disclosed through retrieval, such as Chinese patent literature
Face silver slurry [application number: 201510397922.5；Publication number: CN 104966546A].
This crystal silicon solar energy battery back silver is starched, it is characterised in that: raw material components is by weight
Amount number is calculated as: 50 parts of argentum powder, organic bond 43-47 part, lead-free glass powder 1-5
Part and additive 2 parts.
Although the back silver slurry disclosed in this patent can reduce its erosion at high temperature,
Improve antiageing effect, but, this slurry at silicon chip surface after printing-sintering, battery
Sheet is in and hidden splits state, when tensile test, can be pulled by silicon base layer and destroy cell piece
Internal structure, thus shorten battery life, poor product quality；And cell piece backplane pulling force
Universal at 2.5N-5N, therefore, design a kind of close grid four main grid polycrystalline solar cell back of the body
Face silver slurry and preparation method thereof is necessary.
Summary of the invention
First purpose of the present invention is to there are the problems referred to above for existing technology, proposes
A kind of close grid four main grid polycrystalline back of solar cell silver slurry, this back silver slurry has product
The measured feature of matter.
First purpose of the present invention can be realized by following technical proposal: close grid four are main
Grid polycrystalline back of solar cell silver is starched, it is characterised in that the mass percent of each component is:
Flake silver powder 30-50%, nanometer silver powder 15%-25%, glass dust 3.5%-5.5%, organic
Binding agent 20%-35%, adhesion promoter 0.1%-1.0%, auxiliary agent 0.5-1.0%, respectively
The percetage by weight sum of component is 100%.
Use above component, by with argentum powder as main component, with the addition of suitable the most wherein
Glass dust, organic bond, adhesion promoter and the auxiliary agent of amount, can make this slurry have
Standby excellent printing performance, forms good Ohmic contact with silicon chip and aluminum after sintering, aobvious
Improve the photoelectric transformation efficiency of solaode with writing, its welding performance can be made higher,
The silicon layer area that comes off less than 1%, effectively extends the service life of solaode, produces
Quality is good.
The percetage by weight sum of described flake silver powder and nanometer silver powder is 50-65%.
The mean diameter of described flake silver powder is 4-6 μm, and purity is more than 99.90%.
Using with upper type, during due to flake silver powder particle diameter less than 4 μm, soldering resistance is inadequate
And easy and solder congruent melting, cause adhesive force relatively low；When particle diameter is more than 6 μm, can affect
The printing of slurry, therefore, the flake silver powder selecting particle diameter to be 4-6 μm after combination property.
The mean diameter of described nanometer silver powder is 15-50 μm, and purity is more than 99.80%.
Using with upper type, nanometer silver powder has high dispersive characteristic.
Described glass dust is made up of the raw material of following mass percent: Bi2O320-60%,
PbO 0-20%, ZnO 10-30%, Al2O35-10%, SiO21-10%, B2O310-35%,
Other micro amount of oxygen compounds 0.2-1.5%.
Described organic bond is made up of the raw material of following mass percent: alcohol ester 12
5%-15%, butyl carbitol acetate 50-75%, ethyl cellulose 5-10%, diethyl two
Alcohol butyl ether 10-20%, polyvinyl butyral resin 1-5%.
Second object of the present invention is to there are the problems referred to above for existing technology, proposes
The preparation method of a kind of back silver slurry, this preparation method has the advantages that production cost is low.
Second object of the present invention can be realized by following technical proposal: back silver is starched
Preparation method, it is characterised in that comprise the following steps:
A, the preparation of glass dust: weigh the raw material of preparation glass dust, mixing by formula proportion
After Jun Yun, dry 1-2h in 100-200 DEG C in an oven, then at 600-800 DEG C
Preheating 0.5-1.0h, then at 1200-1300 DEG C of melting 1h, quenches post-drying with deionized water,
Carry out ball milling 20-24h again, sieve after drying, obtain the mean diameter glass less than 5 μm
Glass powder；
B, the preparation of organic bond: weigh the former of preparation organic bond by formula proportion
After material, by its high speed dispersion, then heating for dissolving 1.2-4h at 70-120 DEG C；
The preparation of c, back silver slurry: according to formula proportion, by flake silver powder, nanometer silver powder,
In glass dust prepared in adhesion promoter, auxiliary agent, step a and step b made
Standby organic bond is poured in de-airing mixer, continuously stirred 1h, is formed the most mixed
Compound, then in three roll milling apparatus, dispersion grinds to form homogenizing slurry, then through 300 mesh silks
Net filtration, finally gives the fineness back silver slurry less than 10 μm.
Using above method, enormously simplify production process, production cost is low, performance is steady
Fixed.
Described step a needs to be ground dispersion after the raw material mixing of glass dust, until face
After color is homogeneous, then dry.
In described step b, non-solid raw material need to be first sufficiently stirred for all by organic bond preparation
After even, then it is gradually added solid material.
Described step c needs first be uniformly dispersed by the slurry prepared, then at ball mill
In be ground, finally roll.
Three roll milling apparatus described in step c include base plate, and base plate is fixed with batch mixing
Case, base plate is provided with the treating column that can process the tail gas in mixer, processes
Being provided with some electric heating tubes in tower, electric heating tube is connected with converter by circuit, the end
The controlling organization that can control converter action it is provided with on plate；The import for the treatment of column and conveying
Pipe one end is connected, and the conveying pipe other end is connected with mixer, and conveying pipe is provided with
Electromagnetic valve, base plate is provided with the gas storage that the tail gas in conveying pipe can temporarily be carried out store
Mechanism, gas storage mechanism includes air bag, input pipe and outlet tube, input pipe one end and air bag
Import be connected, the input pipe other end with conveying pipe be connected, input pipe sets successively
Being equipped with the first check valve and the first electromagnetic valve, outlet tube one end is connected with the outlet of air bag,
The outlet tube other end is connected with conveying pipe, and outlet tube is disposed with the second check valve
With the second electromagnetic valve, and input pipe and outlet tube lay respectively at electromagnetic valve both sides；On base plate
It is additionally provided with the cooling body that treating column can be cooled down.
The operation principle of three roll milling apparatus is as follows: mixer production process can produce with
The waste gas of silica flour, the waste gas with silica flour enters in conveying pipe, opens electromagnetic valve, conveying
In pipe, the waste gas with silica flour enters treating column, is made with silica flour by electric heater for heating
Waste gas burning, formed SiO 2 powder；When treating column fault, close electromagnetic valve,
Opening the first electromagnetic valve, in conveying pipe, the waste gas with silica flour enters input pipe, then leads to
Cross the first check valve and enter in air bag, after pending fault eliminates, close the first electromagnetic valve, beat
Open electromagnetic valve and the second electromagnetic valve, the waste gas in air bag enters in outlet tube, then passes through
Second check valve enters in conveying pipe, makes waste gas will not process because for the treatment of column fault
And it is discharged into the external world, process reliable；It is additionally provided with on base plate and treating column can be cooled down
Cooling body, use cooling body that treating column is cooled down, make the treating column will not be because of
Temperature is too high and produces fault, processes the persistent period long, and sustainable performance is good.
Described controlling organization includes controller and warning lamp, and warning lamp is fixed on base plate, frequency conversion
Device is all connected with this controller with warning lamp.
Use above structure, when treating column fault, converter transmission signal to controller,
Controller transmission signal is to warning lamp, and suggesting effect is good；When, after treating column Failure elimination, controlling
Device processed controls converter work, and converter makes electric heating tube rework.
The prompting mechanism that air bag can be pointed out abnormal, prompting mechanism it is additionally provided with on described base plate
Including pressure transducer, alarm bell and display, pressure transducer is arranged on input pipe,
Display is fixed on base plate, pressure transducer, alarm bell and display all with above-mentioned control
Device is connected.
Use above structure, detect that input pipe is abnormal by pressure transducer, then will
Abnormal signal is delivered to controller, and signal is simultaneously communicating to display and alarm bell by controller,
Alarm bell sends warning, and warning function is good.
Described electromagnetic valve, the first electromagnetic valve and the second electromagnetic valve are all connected with controller noted above.
Use above structure, by controller control electromagnetic valve, the first electromagnetic valve, second
Electromagnetic valve action, intelligence degree is high.
Described controller is PLC.
Described cooling body include some blower fans, mounting ring, guide rail, slide block, motor and
Steel wire rope, guide rail is vertically fixed on base plate, and slide block is arranged on guide rail, and motor is fixed
In guide rail upper end, steel wire rope one end is connected with the output shaft of motor, the steel wire rope other end and
Slide block is connected, and mounting ring is fixed on slide block, and treating column is positioned at mounting ring, some
Blower fan is arranged in mounting ring, and the air outlet of blower fan is upward.
Using above structure, drive steel wire rope action by motor work, steel wire rope drives
Slide block moves up and down along guide rail, and then the mounting ring on band movable slider moves up and down, and makes peace
Blower fan on dress ring moves up and down, thus the hot-air accelerated outside treating column is upwards discharged,
Cooling effect is good.
Described guide rail upper end is fixed with upper stroke switch by the first spring, guide rail lower end
Two springs are fixed with lower stroke switch, upper stroke switch, lower stroke switch all with motor phase
Even.
Use above structure, up when move on the highest touching the first spring in mounting ring
During Cheng Kaiguan, upper stroke switch sends signal and makes motor reversal, makes mounting ring move down, when
When mounting ring is displaced downwardly to the lower stroke switch on minimum touching the second spring, lower stroke switch
Sending signal makes motor rotate forward, and makes to move in mounting ring.
Being additionally provided with multi-stage treatment units on described base plate, including exhaust tower, exhaust tower is solid
Being scheduled on base plate, exhaust tower was connected with the outlet for the treatment of column by communicating pipe, on base plate
It is fixed with first grade absorption tower and two-level absorption tower, in first grade absorption tower, is vertically arranged with separation
Plate one, first grade absorption tower is divided into left cavity and right cavity by demarcation strip one, on demarcation strip one
Offering some through holes, the left cavity lower end of first grade absorption tower connects air inlet pipe one, and one
The right cavity upper end on level absorption tower connects escape pipe one, is horizontally disposed with in two-level absorption tower
Having demarcation strip two, two-level absorption tower is separated into upper plenum and lower cavity by demarcation strip two, and two
The upper plenum on level absorption tower connects air inlet pipe two, and the lower cavity of two-level absorption tower connects to be had
Escape pipe two, and escape pipe two is connected with exhaust tower, under two-level absorption tower, cavity connects
Connecting tube one, the other end of connecting tube one is had to be arranged on two-level absorption tower upper plenum, and go out
Connect between trachea one and air inlet pipe two and have connecting tube two；It is further fixed on one on described base plate
Circulating water pool, circulating water pool connects outlet pipe, the other end of outlet pipe and first order absorption
The right cavity of tower is connected, and circulating water pool connects water inlet pipe, the water inlet pipe other end and two grades
Under absorption tower, cavity is connected.
The waste gas burnt enters in first grade absorption tower by air inlet pipe one, circulating water pool
Interior water can be sprayed by outlet pipe in first grade absorption tower, inhales waste gas
Receive, and offer through hole on demarcation strip one and primarily serve the effect of filtration, meanwhile, one-level
Waste gas and water in absorption tower are flowed out by escape pipe one, and by connecting tube two and air inlet pipe
In two upper plenums entering into two-level absorption tower, then entered into two grades of absorptions by connecting tube one
In the upper plenum of tower, thus realizing multistage purification, two-level absorption tower purified gas leads to
Cross escape pipe two and enter into exhaust tower discharge, and the water of two-level absorption tower is entered by water inlet pipe
Recycle in circulating water pool.
It is provided with drainage screen on described demarcation strip one.
Drainage screen primarily serves the work that the carrying out to the waste gas entered in first grade absorption tower is filtered
With.
Described exhaust tower has inner chamber, and the upper end of exhaust tower is provided with gas outlet, described
It is horizontally fixed with in exhaust tower on demarcation strip three, and demarcation strip three and offers some filtering holes,
Described demarcation strip three exhaust tower inner chamber is separated into the most successively upper inner chamber and lower in
Chamber.
Exhaust tower is separated on upper inner chamber and lower inner cavity, and demarcation strip three and opens by demarcation strip three
It is provided with filtering holes, thus waste gas is refiltered process.
It is provided with some ultraviolet radiator in described exhaust tower lower inner cavity.
Ultraviolet radiator in exhaust tower lower inner cavity can carry out sterilization processing to waste gas.
It is also coated with activated carbon on the inwall of cavity under described two-level absorption tower.
Under two-level absorption tower, the activated carbon in cavity is to have bought existing product on market,
The effect to exhaust air deodorization can be played.
Compared with prior art, this close grid four main grid polycrystalline back of solar cell silver slurry and
Preparation method has the advantage that
1, by with argentum powder as main component in this back silver slurry, with the addition of suitable the most wherein
Glass dust, organic bond, adhesion promoter and the auxiliary agent of amount, can make this slurry have
Standby excellent printing performance, forms good Ohmic contact with silicon chip and aluminum after sintering, aobvious
Improve the photoelectric transformation efficiency of solaode with writing, its welding performance can be made higher,
The silicon layer area that comes off less than 1%, effectively extends the service life of solaode, produces
Quality is good.
2, the glass combination in this back silver slurry and the thermal expansion of additive combined sintering thing
Coefficient is sufficiently close to silicon, and the degree immersing silicon layer is the lowest, the least to silicon substrate damage,
Hidden for cell piece degree of splitting can be down to minimum, the requirement of high adhesion force can be met again simultaneously,
Component is reasonable.
3, enormously simplify production process in this preparation method, production cost is low, performance is steady
Fixed.
4, in three roll milling apparatus when treating column fault, with the waste gas of silica flour in conveying pipe
Input pipe can be entered, enter in air bag by the first check valve, after pending fault eliminates, gas
Waste gas in capsule enters in outlet tube, is entered in conveying pipe by the second check valve, makes to give up
Gas will not process because for the treatment of column fault and be discharged into the external world, processes reliable.
5, detect that input pipe is abnormal by pressure transducer, then abnormal signal is transmitted
To controller, signal is simultaneously communicating to display and alarm bell by controller, and alarm bell sends report
Alert, warning function is good.
Accompanying drawing explanation
Fig. 1 is the planar structure schematic diagram that three roll milling apparatus remove part.
Fig. 2 is the sectional structure schematic diagram that three roll milling apparatus remove part.
In figure, 1, base plate；2, controller；3, display；4, warning lamp；5, electricity adds
Heat pipe；6, treating column；7, the second spring；8, guide rail；9, lower stroke switch；10、
Slide block；11, mounting ring；12, blower fan；13, steel wire rope；14, upper stroke switch；
15, the first spring；16, motor；17, converter；18, outlet tube；19, electromagnetism
Valve；20, conveying pipe；21, input pipe；22, the first electromagnetic valve；23, pressure sensing
Device；24, the first check valve；25, air bag；26, the second check valve；27, the second electricity
Magnet valve；28, alarm bell；51, exhaust tower；52, first grade absorption tower；53, two grades of absorptions
Tower；54, demarcation strip one；55, air inlet pipe one；56, escape pipe one；57, demarcation strip
Two；58, air inlet pipe two；59, escape pipe two；60, connecting tube one；61, connecting tube
Two；62, circulating water pool；63, outlet pipe；64, water inlet pipe；65, demarcation strip three；
66, ultraviolet radiator.
Detailed description of the invention
The following is the specific embodiment of the present invention and combine accompanying drawing, the technical side to the present invention
Case is further described, but the present invention is not limited to these embodiments.
This close grid four main grid polycrystalline back of solar cell silver slurry, the mass percent of each component
For: flake silver powder 30-50%, nanometer silver powder 15%-25%, glass dust 3.5%-5.5%,
Organic bond 20%-35%, adhesion promoter 0.1%-1.0%, auxiliary agent 0.5-1.0%,
The percetage by weight sum of each component is 100%；Adhesion promoter is various metals chemical combination
A kind of inorganic compositions that thing is polymerized, non-industry conventional use of adhesive force additive,
Adhesion promoter uses the existing product can bought on market；Auxiliary agent be metal powder or
Metal-oxide, owing to it is good with scolding tin weldability, it is provided that higher welding performance,
Auxiliary agent uses the existing product can bought on market；Use this component, by with argentum powder
For main component, with the addition of appropriate glass dust, organic bond, attachment the most wherein
Power accelerator and auxiliary agent, can make this slurry possess the printing performance of excellence, with silicon after sintering
Sheet and aluminum form good Ohmic contact, and the photoelectricity considerably improving solaode turns
Changing efficiency, its welding performance can be made higher, the silicon layer area that comes off less than 1%, prolongs effectively
The service life of solaode, good product quality are grown.
The percetage by weight sum of flake silver powder and nanometer silver powder is 50-65%；Flake silver powder
Mean diameter be 4-6 μm, purity be more than 99.90%；Use which, due to lamellar
When argentum powder particle diameter is less than 4 μm, soldering resistance not and easily with solder congruent melting, cause adhering to
Power is relatively low；When particle diameter is more than 6 μm, the printing of slurry can be affected, therefore, comprehensive
The flake silver powder that particle diameter can be selected afterwards to be 4-6 μm.
The mean diameter of nanometer silver powder is 15-50 μm, and purity is more than 99.80%, in this reality
Executing in example, nanometer silver powder has high dispersive characteristic.
Glass dust is made up of the raw material of following mass percent: Bi2O320-60%, PbO
0-20%, ZnO 10-30%, Al2O35-10%, SiO21-10%, B2O310-35%, its
His micro amount of oxygen compound 0.2-1.5%.
Organic bond is made up of the raw material of following mass percent: alcohol ester 12
5%-15%, butyl carbitol acetate 50-75%, ethyl cellulose 5-10%, diethyl two
Alcohol butyl ether 10-20%, polyvinyl butyral resin 1-5%.
The preparation method of this back silver slurry, comprises the following steps:
A, the preparation of glass dust: weigh the raw material of preparation glass dust, mixing by formula proportion
After Jun Yun, dry 1-2h in 100-200 DEG C in an oven, then at 600-800 DEG C
Preheating 0.5-1.0h, then at 1200-1300 DEG C of melting 1h, quenches post-drying with deionized water,
Carry out ball milling 20-24h again, sieve after drying, obtain the mean diameter glass less than 5 μm
Glass powder；Step a needs to be ground dispersion after the raw material mixing of glass dust, until color
After homogeneous, then dry；
B, the preparation of organic bond: weigh the former of preparation organic bond by formula proportion
After material, by its high speed dispersion, then heating for dissolving 1.2-4h at 70-120 DEG C；Step
After in b, non-solid raw material need to first be stirred by organic bond preparation, more progressively
Add solid material；
The preparation of c, back silver slurry: according to formula proportion, by flake silver powder, nanometer silver powder,
In glass dust prepared in adhesion promoter, auxiliary agent, step a and step b made
Standby organic bond is poured in de-airing mixer, continuously stirred 1h, is formed the most mixed
Compound, then in three roll milling apparatus, dispersion grinds to form homogenizing slurry, then through 300 mesh silks
Net filtration, finally gives the fineness back silver slurry less than 10 μm；Step c need first will
The slurry prepared is uniformly dispersed, and is then ground in ball mill, finally rolls.
Using the method, enormously simplify production process, production cost is low, stable performance.
As it is shown in figure 1, three roll milling apparatus in step c include base plate 1, on base plate 1
It is fixed with mixer, base plate 1 is provided with and the tail gas in mixer can be processed
Treating column 6, is provided with some electric heating tubes 5, in the present embodiment, electricity in treating column 6
The quantity adding heat pipe 5 is three；Electric heating tube 5 is connected with converter 17 by circuit,
The controlling organization that can control converter 17 action it is provided with on base plate 1；Entering for the treatment of column 6
Mouth is connected with conveying pipe 20 one end, and the material of conveying pipe 20 is ferrum, treating column 6 He
Conveying pipe 20 is connected by the way of welding, conveying pipe 20 other end and mixer phase
Connection, conveying pipe 20 is provided with electromagnetic valve 19, base plate 1 is provided with and can will carry
Tail gas in pipe 20 temporarily carries out the gas storage mechanism stored, gas storage mechanism include air bag 25,
Input pipe 21 and outlet tube 18, input pipe 21 one end is connected with the import of air bag 25,
Input pipe 21 one end is connected by sealing strip with the import of air bag 25, input pipe 21 another
Hold and be connected with conveying pipe 20, input pipe 21 is disposed with the first check valve 24
With the first electromagnetic valve 22, outlet tube 18 one end is connected with the outlet of air bag 25, output
Pipe 18 other end is connected with conveying pipe 20, outlet tube 18 is disposed with second single
To valve 26 and the second electromagnetic valve 27, and input pipe 21 and outlet tube 18 lay respectively at electricity
Magnet valve 19 both sides；The cooler that treating column 6 can be cooled down it is additionally provided with on base plate 1
Structure.
As it is shown in figure 1, controlling organization includes that controller 2 and warning lamp 4, warning lamp 4 are fixed
On base plate 1, the mode that warning lamp 4 is bolted is fixed on base plate 1, frequency conversion
Device 17 is all connected with this controller 2 with warning lamp 4, in the present embodiment, and controller 2
Use the single-chip microcomputer can bought on market, Single-chip Controlling electromagnetic valve, bell, sensor,
The program of converter and lamp is existing, and its program need not update；Use above knot
Structure, when treating column 6 fault, in the present embodiment, fault is of short duration power-off, frequency conversion
Device 17 transmits signal to controller 2, and controller 2 transmits signal and makees to warning lamp 4, prompting
Make good use of；When, after treating column 6 Failure elimination, controller 2 controls converter 17 and works, become
Frequently device 17 makes electric heating tube 5 rework；Certainly, converter 17 can also pass through line
Road is connected with air exhauster.
As it is shown in figure 1, be additionally provided with the prompt machine that can point out air bag 25 exception on base plate 1
Structure, prompting mechanism includes pressure transducer 23, alarm bell 28 and display 3, pressure sensing
Device 23 is arranged on input pipe 21, and display 3 is fixed on base plate 1, display 3
The mode being bolted is fixed on base plate 1, pressure transducer 23, alarm bell 28
All it is connected with controller 2 with display 3, uses above structure, pass through pressure transducer
23 detect that input pipe 21 is abnormal, then abnormal signal is delivered to controller 2, controls
Signal is simultaneously communicating to display 3 and alarm bell 28 by device 2, and alarm bell 28 sends warning,
Warning function is good.
As it is shown in figure 1, electromagnetic valve the 19, first electromagnetic valve 22 and the second electromagnetic valve 27 are equal
Be connected with controller 2, use above structure, by controller 2 control electromagnetic valve 19,
First electromagnetic valve the 22, second electromagnetic valve 27 action, intelligence degree is high；Controller 2
For PLC.
As it is shown in figure 1, cooling body include some blower fans 12, mounting ring 11, guide rail 8,
Slide block 10, motor 16 and steel wire rope 13, guide rail 8 is vertically fixed on base plate 1, leads
Rail 8 is fixed on base plate 1 by the way of welding, and slide block 10 is arranged on guide rail 8,
Motor 16 is fixed on guide rail 8 upper end, and the mode that motor 16 is bolted is fixed on
Guide rail 8 upper end, steel wire rope 13 one end is connected with the output shaft of motor 16, steel wire rope 13
The other end is connected with slide block 10, and mounting ring 11 is fixed on slide block 10, mounting ring 11
It is fixed on slide block 10 by the way of welding, and treating column 6 is positioned at mounting ring 11,
Some blower fans 12 are arranged in mounting ring 11, in the present embodiment, and the quantity of blower fan 12
It is six, and the air outlet of blower fan 12 is upward, use above structure, by motor 16
Work drives steel wire rope 13 action, and steel wire rope 13 band movable slider 10 moves down along guide rail 8
Move, and then the mounting ring 11 on band movable slider 10 moves up and down, and makes in mounting ring 11
Blower fan 12 moves up and down, thus the hot-air accelerated outside treating column 6 is upwards discharged, cooling
Make good use of.
As it is shown in figure 1, guide rail 8 upper end is fixed with upper stroke switch by the first spring 15
14, guide rail 8 lower end the second spring 7 is fixed with lower stroke switch 9, upper stroke switch 14,
Lower stroke switch 9 is all connected with motor 16, uses above structure, when in mounting ring 11
When moving to the upper stroke switch 14 on the highest touching the first spring 15, upper stroke switch 14
Sending signal makes motor 16 invert, and makes mounting ring 11 move down, when mounting ring 11 is displaced downwardly to
During lower stroke switch 9 on minimum touching the second spring 7, lower stroke switch 9 sends letter
Number make motor 16 rotate forward, make to move in mounting ring 11.
As in figure 2 it is shown, be additionally provided with multi-stage treatment units on base plate 1, including exhaust tower
51, exhaust tower 51 is fixed on base plate 1, and exhaust tower 51 is by communicating pipe and treating column
The outlet of 6 is connected, and base plate 1 is fixed with first grade absorption tower 52 and two-level absorption tower 53；
Being vertically arranged with demarcation strip 1 in first grade absorption tower 52, one-level is inhaled by demarcation strip 1
Receive tower 52 and be divided into left cavity and right cavity, demarcation strip 1 offers through hole, and divides
Being provided with drainage screen on dividing plate 1, drainage screen primarily serves entering first grade absorption tower
Waste gas in 52 carries out the effect filtered；The left cavity lower end of first grade absorption tower 52 connects
Having air inlet pipe 1, the right cavity upper end of first grade absorption tower 52 connects escape pipe 1,
Being horizontally disposed with demarcation strip 2 57 in two-level absorption tower 53, demarcation strip 2 57 is by two grades of suctions
Receiving tower 53 and be separated into upper plenum and lower cavity, the upper plenum of two-level absorption tower 53 connects to be had
Air inlet pipe 2 58, the lower cavity of two-level absorption tower 53 connects escape pipe 2 59, and goes out
Trachea 2 59 is connected with exhaust tower 51, and 53 times cavitys of two-level absorption tower connect connection
Pipe 1, the other end of connecting tube 1 is arranged on two-level absorption tower 53 upper plenum, and
Connect between escape pipe 1 and air inlet pipe 2 58 and have connecting tube 2 61；
Shown in Fig. 2, frame being further fixed on a circulating water pool 62, circulating water pool 62 is even
Being connected to outlet pipe 63, the other end of outlet pipe 63 cavity right with first grade absorption tower 52 is connected
Connecing, circulating water pool 62 connects water inlet pipe 64, water inlet pipe 64 other end and two grades of absorptions
53 times cavitys of tower are connected；Exhaust tower 51 has inner chamber, and the upper end of exhaust tower 51 is arranged
There is gas outlet, in exhaust tower 51, be horizontally fixed with demarcation strip 3 65, and demarcation strip 3 65
On offer some filtering holes, exhaust tower 51 inner chamber is depended on by demarcation strip 3 65 from top to bottom
Secondary it is separated into inner chamber and lower inner cavity；Exhaust tower 51 is separated into upper interior by demarcation strip 3 65
Offer filtering holes on chamber and lower inner cavity, and demarcation strip 3 65, thus waste gas is carried out again
Filtration treatment；Some ultraviolet radiator 66 it is provided with, row in exhaust tower 51 lower inner cavity
Ultraviolet radiator 66 in gas tower 51 lower inner cavity can carry out sterilization processing to waste gas.
Shown in Fig. 2, the inwall of 53 times cavitys of two-level absorption tower is also coated with activated carbon, two
Activated carbon in the cavity of 53 times, absorption tower of level is to have bought existing product on market, it is possible to
Play the effect to exhaust air deodorization.
The operation principle of three roll milling apparatus is as follows: mixer production process can produce with
The waste gas of silica flour, the waste gas with silica flour enters in conveying pipe 20, by controller 2
Opening electromagnetic valve 19, in conveying pipe 20, the waste gas with silica flour enters treating column 6, passes through
Controller 2 controls converter 17 and works, and converter 17 makes electric heating tube 5 work, and makes
With the waste gas burning of silica flour, form SiO 2 powder；When treating column 6 fault,
Close electromagnetic valve 19 by controller 2, then open the first electromagnetic valve by controller 2
22, in conveying pipe 20, the waste gas with silica flour enters input pipe 21, then by first
Check valve 24 enters in air bag 25, after pending fault eliminates, closes the by controller 2
One electromagnetic valve 22, then opens electromagnetic valve 19 and the second electromagnetic valve 27 by controller 2,
Waste gas in air bag 25 enters in outlet tube 18, is then entered by the second check valve 26
In conveying pipe 20；The waste gas burnt enters into first grade absorption tower by air inlet pipe 1
In 52, the water in circulating water pool 62 can be to first grade absorption tower 52 by outlet pipe 63
Inside spray, and offer through hole on demarcation strip 1 and primarily serve the effect of filtration,
Meanwhile, waste gas and water in first grade absorption tower 52 are flowed out by escape pipe 1, and pass through
Connecting tube 2 61 and air inlet pipe 2 58 enter in the upper plenum of two-level absorption tower 53, then
Entered into by connecting tube 1 in the upper plenum of two-level absorption tower 53, thus realize multistage
Purifying, two-level absorption tower 53 purified gas enters into aerofluxus by escape pipe 2 59
Tower 51 is discharged, and the water of two-level absorption tower 53 is entered into circulating water pool by water inlet pipe 64
Recycle in 62.
The embodiment one of preparation method:
A, the preparation of glass dust: weigh Bi2O341.2%, PbO 10.8%, ZnO 18.2%,
Al2O38.4%, SiO23.2%, B2O317.3%, other micro amount of oxygen compounds 0.9%, its
His micro amount of oxygen compound is one or more in following several oxide: In2O3, TiO2With
Fe2O3, after mix homogeneously, dry 1.5h in 150 DEG C in an oven, then at 650 DEG C
Lower preheating 1.0h, then at 1250 DEG C of melting 1h, quenches post-drying with deionized water, then enters
Row ball milling 21h, sieves after drying, obtains the mean diameter glass dust less than 5 μm；
B, the preparation of organic bond: weigh alcohol ester ten two 10.25%, butyl carbitol
Acetate 63.5%, ethyl cellulose 5.7%, butyl 16.75%, polyethylene
Butyral 3.8%, by its high speed dispersion, then heating for dissolving 2.5h at 100 DEG C；
The preparation of c, back silver slurry: according to argentum powder 60.5%, glass dust 5.2%, organic viscous
Mixture 33%, adhesive force additive 0.8%, the ratio of auxiliary agent 0.5% is poured into vacuum stirring
In machine, continuously stirred 1h, form homogeneous mixture, then disperse in three roll milling apparatus
Grind to form homogenizing slurry, then through 300 mesh silk screen filter, finally giving fineness fineness is 9
Micron, viscosity is the back silver slurry of 28Pa S；Wherein, argentum powder is flake silver powder and receives
Rice argentum powder, flake silver powder purity is more than 99.90%, and mean diameter is 5.1 μm, nanometer silver
Powder purity is more than 99.80%, and mean diameter is 16.8 μm.
By back silver slurry with 280 mesh screen paintings at the polysilicon sun of 156mm × 156mm
The energy cell piece back side, after making cell piece according to crystal silicon solar cell sheet Making programme
Carrying out photoelectric transformation efficiency test, conversion efficiency meansigma methods reaches 18.2%；With containing lead welding
Cell piece is welded at 360 DEG C by band, then carries out 180 ° of peel tests, test result
Display initial adhesion is all higher than 5.5N, and at 180 DEG C, the aging adhesive force of 3h is above
4.3N, and after initial tensile force, the area that comes off of silicon substrate surface silicon is less than 1%；Test
Result such as table 1 and 2.
Table 1 back silver paste electric performance test result
| Silver slurry | Pmpp | Uoc | Isc | Rs | Rsh | FF | NCell |
| Embodiment one | 4.40624 | 0.63524 | 8.78891 | 0.00247 | 9.71027 | 78.9244 | 0.18176 |
| Contrast | 4.37589 | 0.63450 | 8.79033 | 0.00273 | 5.42365 | 78.4567 | 0.17981 |
Table 2 back silver paste adhesive force and silicon layer come off area test result
The embodiment two of preparation method:
A, the preparation of glass dust: weigh Bi2O321.1%, PbO 12.8%, ZnO 22.3%,
Al2O35.9%, SiO28.3%, B2O329.3%, other micro amount of oxygen compounds 0.3%, its
His micro amount of oxygen compound is one or more in following several oxide: In2O3, TiO2With
Fe2O3, after mix homogeneously, dry 1.5h in 150 DEG C in an oven, then at 650 DEG C
Lower preheating 1.0h, then at 1250 DEG C of melting 1h, quenches post-drying with deionized water, then enters
Row ball milling 21h, sieves after drying, obtains the mean diameter glass dust less than 5 μm；
B, the preparation of organic bond: weigh alcohol ester ten two 14.5%, butyl carbitol vinegar
Acid esters 54.5%, ethyl cellulose 8.0%, butyl 18.7%, polyvinyl alcohol
Butyral 4.3%, by its high speed dispersion, then heating for dissolving 2.5h at 100 DEG C；
The preparation of c, back silver slurry: according to argentum powder 58.5%, glass dust 4.8%, organic viscous
Mixture 35%, adhesive force additive 0.8%, the ratio of auxiliary agent 0.9% is poured into vacuum stirring
In machine, continuously stirred 1h, form homogeneous mixture, then disperse in three roll milling apparatus
Grind to form homogenizing slurry, then through 300 mesh silk screen filter, finally giving fineness fineness is 9
Micron, viscosity is the back silver slurry of 26Pa S；Wherein, argentum powder is flake silver powder and receives
Rice argentum powder, flake silver powder purity is more than 99.90%, and mean diameter is 5.1 μm, nanometer silver
Powder purity is more than 99.80%, and mean diameter is 16.8 μm.
By back silver slurry with 280 mesh screen paintings at the polysilicon sun of 156mm × 156mm
The energy cell piece back side, after making cell piece according to crystal silicon solar cell sheet Making programme
Carrying out photoelectric transformation efficiency test, conversion efficiency meansigma methods reaches 18.1%；With containing lead welding
Cell piece is welded at 360 DEG C by band, then carries out 180 ° of peel tests, test result
Display initial adhesion is all higher than 5.2N, and at 180 DEG C, the aging adhesive force of 3h is above
4.5N, and after initial tensile force, the area that comes off of silicon substrate surface silicon is less than 1%；Test
Result such as table 3 and table 4.
Table 3 back silver paste electric performance test result
| Silver slurry | Pmpp | Uoc | Isc | Rs | Rsh | FF | NCell |
| Embodiment one | 4.40212 | 0.63561 | 8.84286 | 0.00261 | 7.47821 | 78.3256 | 0.18087 |
| Contrast | 4.37589 | 0.63450 | 8.79033 | 0.00273 | 5.42365 | 78.4567 | 0.17981 |
Table 4 back silver paste adhesive force and silicon layer come off area test result
| Slurry | Initial adhesion | Aging adhesive force (180 DEG C, 3h) | Silicon layer comes off area |
| Embodiment two | 5.2N | 4.5N | 0.8% |
| Contrast | 4.0N | 3.0N | 80% |
The embodiment three of preparation method:
A, the preparation of glass dust: weigh Bi2O351.5%, PbO 7.8%, ZnO 13.3%,
Al2O35.4%, SiO25.0%, B2O316.3%, other micro amount of oxygen compounds 0.7%, its
His micro amount of oxygen compound is one or more in following several oxide: In2O3, TiO2With
Fe2O3, after mix homogeneously, dry 1.5h in 150 DEG C in an oven, then at 650 DEG C
Lower preheating 1.0h, then at 1250 DEG C of melting 1h, quenches post-drying with deionized water, then enters
Row ball milling 21h, sieves after drying, obtains the mean diameter glass dust less than 5 μm；
B, the preparation of organic bond: weigh alcohol ester ten two 5.5%, butyl carbitol vinegar
Acid esters 70.5%, ethyl cellulose 8.2%, butyl 12.9%, polyvinyl alcohol
Butyral 2.9%, by its high speed dispersion, then heating for dissolving 2.5h at 100 DEG C；
The preparation of c, back silver slurry: according to argentum powder 63%, glass dust 3.1%, organic
Agent 32.4%, adhesive force additive 0.8%, the ratio of auxiliary agent 0.7% is poured into vacuum stirring
In machine, continuously stirred 1h, form homogeneous mixture, then disperse in three roll milling apparatus
Grind to form homogenizing slurry, then through 300 mesh silk screen filter, finally giving fineness fineness is 9
Micron, viscosity is the back silver slurry of 33Pa S；Wherein, argentum powder is flake silver powder and receives
Rice argentum powder, flake silver powder purity is more than 99.90%, and mean diameter is 5.1 μm, nanometer silver
Powder purity is more than 99.80%, and mean diameter is 16.8 μm.
By back silver slurry with 280 mesh screen paintings at the polysilicon sun of 156mm × 156mm
The energy cell piece back side, after making cell piece according to crystal silicon solar cell sheet Making programme
Carrying out photoelectric transformation efficiency test, conversion efficiency meansigma methods reaches 18.3%；With containing lead welding
Cell piece is welded at 360 DEG C by band, then carries out 180 ° of peel tests, test result
Display initial adhesion is all higher than 5.7N, and at 180 DEG C, the aging adhesive force of 3h is above
4.8N, and after initial tensile force, the area that comes off of silicon substrate surface silicon is less than 1%；Test
Result such as table 5 and table 6.
Table 5 back silver paste electric performance test result
| Silver slurry | Pmpp | Uoc | Isc | Rs | Rsh | FF | NCell |
| Embodiment three | 4.40713 | 0.63636 | 8.87623 | 0.00260 | 8.76091 | 78.0387 | 0.18319 |
| Contrast | 4.37589 | 0.63450 | 8.79033 | 0.00273 | 5.42365 | 78.4567 | 0.17981 |
Table 6 back silver paste adhesive force and silicon layer come off area test result
| Slurry | Initial adhesion | Aging adhesive force (180 DEG C, 3h) | Silicon layer comes off area |
| Embodiment three | 5.7N | 4.8N | 0.5% |
| Contrast | 4.0N | 3.0N | 80% |
Specific embodiment described herein is only to present invention spirit theory for example
Bright.Those skilled in the art can be to described specific embodiment
Make various amendment or supplement or use similar mode to substitute, but without departing from
The spirit of the present invention or surmount scope defined in appended claims.
Claims (10)
- The closeest grid four main grid polycrystalline back of solar cell silver is starched, it is characterised in that each component Mass percent be: flake silver powder 30-50%, nanometer silver powder 15%-25%, glass dust 3.5%-5.5%, organic bond 20%-35%, adhesion promoter 0.1%-1.0%, help Agent 0.5-1.0%, the percetage by weight sum of each component is 100%.
- Close grid four main grid polycrystalline back of solar cell the most according to claim 1 silver Slurry, it is characterised in that the percetage by weight sum of described flake silver powder and nanometer silver powder is 50-65%；The mean diameter of described flake silver powder is 4-6 μm, and purity is more than 99.90%； The mean diameter of described nanometer silver powder is 15-50 μm, and purity is more than 99.80%；Described glass Glass powder is made up of the raw material of following mass percent: Bi2O320-60%, PbO 0-20%, ZnO 10-30%, Al2O35-10%, SiO21-10%, B2O310-35%, other trace Oxide 0.2-1.5%；Described organic bond is by the raw material group of following mass percent Become: alcohol ester 12 5%-15%, butyl carbitol acetate 50-75%, ethyl cellulose 5-10%, butyl 10-20%, polyvinyl butyral resin 1-5%.
- Close grid four main grid polycrystalline back of solar cell the most according to claim 1 silver Slurry, it is characterised in that the preparation method of back silver slurry comprises the following steps:A, the preparation of glass dust: weigh the raw material of preparation glass dust, mixing by formula proportion After Jun Yun, dry 1-2h in 100-200 DEG C in an oven, then at 600-800 DEG C Preheating 0.5-1.0h, then at 1200-1300 DEG C of melting 1h, quenches post-drying with deionized water, Carry out ball milling 20-24h again, sieve after drying, obtain the mean diameter glass less than 5 μm Glass powder；B, the preparation of organic bond: weigh the former of preparation organic bond by formula proportion After material, by its high speed dispersion, then heating for dissolving 1.2-4h at 70-120 DEG C；The preparation of c, back silver slurry: according to formula proportion, by flake silver powder, nanometer silver powder, In glass dust prepared in adhesion promoter, auxiliary agent, step a and step b made Standby organic bond is poured in de-airing mixer, continuously stirred 1h, is formed the most mixed Compound, then in three roll milling apparatus, dispersion grinds to form homogenizing slurry, then through 300 mesh silks Net filtration, finally gives the fineness back silver slurry less than 10 μm.
- The preparation method of back silver the most according to claim 3 slurry, it is characterised in that Three roll milling apparatus described in step c include base plate, and base plate is fixed with mixer, The treating column that the tail gas in mixer can be processed it is provided with, in treating column on base plate Being provided with some electric heating tubes, electric heating tube is connected with converter, on base plate by circuit It is provided with the controlling organization that can control converter action；The import for the treatment of column and conveying pipe one End is connected, and the conveying pipe other end is connected with mixer, and conveying pipe is provided with electromagnetism Valve, base plate is provided with the gas storage mechanism that the tail gas in conveying pipe can temporarily be carried out store, Gas storage mechanism includes air bag, input pipe and outlet tube, input pipe one end and the import of air bag Being connected, the input pipe other end is connected with conveying pipe, and input pipe is disposed with the One check valve and the first electromagnetic valve, outlet tube one end is connected with the outlet of air bag, output The pipe other end is connected with conveying pipe, and outlet tube is disposed with the second check valve and the Two electromagnetic valves, and input pipe and outlet tube lay respectively at electromagnetic valve both sides；Also set on base plate It is equipped with the cooling body that treating column can be cooled down.
- The preparation method of back silver the most according to claim 4 slurry, it is characterised in that Described controlling organization includes controller and warning lamp, and warning lamp is fixed on base plate, converter and Warning lamp is all connected with this controller.
- The preparation method of back silver the most according to claim 6 slurry, it is characterised in that Being additionally provided with the prompting mechanism that air bag can be pointed out abnormal on described base plate, prompting mechanism includes Pressure transducer, alarm bell and display, pressure transducer is arranged on input pipe, display Device is fixed on base plate, pressure transducer, alarm bell and display all with controller noted above phase Even.
- The preparation method of back silver the most according to claim 6 slurry, it is characterised in that Described electromagnetic valve, the first electromagnetic valve and the second electromagnetic valve are all connected with controller noted above.
- The preparation method of back silver the most according to claim 7 slurry, it is characterised in that Described cooling body includes some blower fans, mounting ring, guide rail, slide block, motor and steel wire Rope, guide rail is vertically fixed on base plate, and slide block is arranged on guide rail, and motor is fixed on leads Rail upper end, steel wire rope one end is connected with the output shaft of motor, the steel wire rope other end and slide block Being connected, mounting ring is fixed on slide block, and treating column is positioned at mounting ring, some blower fans It is arranged in mounting ring, and the air outlet of blower fan is upward.
- The preparation method of back silver the most according to claim 8 slurry, it is characterised in that Described guide rail upper end is fixed with upper stroke switch, guide rail lower end the second bullet by the first spring Spring is fixed with lower stroke switch, and upper stroke switch, lower stroke switch are all connected with motor.
- The preparation method of back silver the most according to claim 9 slurry, its feature exists In, described base plate is additionally provided with multi-stage treatment units, including exhaust tower, exhaust tower is solid Being scheduled on base plate, exhaust tower was connected with the outlet for the treatment of column by communicating pipe, on base plate It is fixed with first grade absorption tower and two-level absorption tower, in first grade absorption tower, is vertically arranged with separation Plate one, first grade absorption tower is divided into left cavity and right cavity by demarcation strip one, on demarcation strip one Offering some through holes, the left cavity lower end of first grade absorption tower connects air inlet pipe one, and one The right cavity upper end on level absorption tower connects escape pipe one, is horizontally disposed with in two-level absorption tower Having demarcation strip two, two-level absorption tower is separated into upper plenum and lower cavity by demarcation strip two, and two The upper plenum on level absorption tower connects air inlet pipe two, and the lower cavity of two-level absorption tower connects to be had Escape pipe two, and escape pipe two is connected with exhaust tower, under two-level absorption tower, cavity connects Connecting tube one, the other end of connecting tube one is had to be arranged on two-level absorption tower upper plenum, and go out Connect between trachea one and air inlet pipe two and have connecting tube two；It is further fixed on one on described base plate Circulating water pool, circulating water pool connects outlet pipe, the other end of outlet pipe and first order absorption The right cavity of tower is connected, and circulating water pool connects water inlet pipe, the water inlet pipe other end and two grades Under absorption tower, cavity is connected；It is provided with drainage screen on described demarcation strip one；Described aerofluxus Tower has inner chamber, and the upper end of exhaust tower is provided with gas outlet, level in described exhaust tower It is fixed with on demarcation strip three, and demarcation strip three and offers some filtering holes, described separation Exhaust tower inner chamber is separated into upper inner chamber and lower inner cavity by plate three the most successively；Described row It is provided with some ultraviolet radiator in gas tower lower inner cavity；Cavity under described two-level absorption tower Inwall on be also coated with activated carbon.
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| CN201610341260.4A CN105845756B (en) | 2016-05-20 | 2016-05-20 | Close main grid polycrystalline back of solar cell silver paste of grid four and preparation method thereof |
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| CN201610341260.4A CN105845756B (en) | 2016-05-20 | 2016-05-20 | Close main grid polycrystalline back of solar cell silver paste of grid four and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621891A (en) * | 2016-12-01 | 2017-05-10 | 许国梁 | Coal desulfurizer preparation device for haze prevention |
| CN108159916A (en) * | 2017-12-20 | 2018-06-15 | 周福明 | A kind of air detection instrument spray painting raw material mixing plant |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810289B (en) * | 2016-05-20 | 2017-10-24 | 浙江光隆能源科技股份有限公司 | Aluminium paste that back of the body polishing polycrystalline solar cell is used and preparation method thereof |
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| CN103000252A (en) * | 2012-11-10 | 2013-03-27 | 江苏瑞德新能源科技有限公司 | Solar cell silver-backed slurry ultralow in silver content |
| CN104700923A (en) * | 2013-12-10 | 2015-06-10 | 湖南利德电子浆料有限公司 | Solar cell back sliver paste with high photoelectric conversion efficiency and production method thereof |
| CN104981123A (en) * | 2014-04-10 | 2015-10-14 | 美国博通公司 | Mechanical chassis for a communication device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000252A (en) * | 2012-11-10 | 2013-03-27 | 江苏瑞德新能源科技有限公司 | Solar cell silver-backed slurry ultralow in silver content |
| CN104700923A (en) * | 2013-12-10 | 2015-06-10 | 湖南利德电子浆料有限公司 | Solar cell back sliver paste with high photoelectric conversion efficiency and production method thereof |
| CN104981123A (en) * | 2014-04-10 | 2015-10-14 | 美国博通公司 | Mechanical chassis for a communication device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621891A (en) * | 2016-12-01 | 2017-05-10 | 许国梁 | Coal desulfurizer preparation device for haze prevention |
| CN108159916A (en) * | 2017-12-20 | 2018-06-15 | 周福明 | A kind of air detection instrument spray painting raw material mixing plant |
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| CN105845756B (en) | 2017-07-14 |
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