CN105810289B - Aluminium paste that back of the body polishing polycrystalline solar cell is used and preparation method thereof - Google Patents
Aluminium paste that back of the body polishing polycrystalline solar cell is used and preparation method thereof Download PDFInfo
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- CN105810289B CN105810289B CN201610342996.3A CN201610342996A CN105810289B CN 105810289 B CN105810289 B CN 105810289B CN 201610342996 A CN201610342996 A CN 201610342996A CN 105810289 B CN105810289 B CN 105810289B
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 115
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 239000004411 aluminium Substances 0.000 title claims abstract description 106
- 238000005498 polishing Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title abstract description 31
- 238000010521 absorption reaction Methods 0.000 claims description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 238000003801 milling Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000005485 electric heating Methods 0.000 claims description 12
- 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
- 238000012545 processing Methods 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 7
- 230000008520 organization Effects 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 239000002775 capsule Substances 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 55
- 229910052710 silicon Inorganic materials 0.000 abstract description 36
- 239000010703 silicon Substances 0.000 abstract description 36
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 35
- 239000005300 metallic glass Substances 0.000 abstract description 28
- 238000005245 sintering Methods 0.000 abstract description 21
- 239000012752 auxiliary agent Substances 0.000 abstract description 20
- 239000002994 raw material Substances 0.000 abstract description 19
- 230000009466 transformation Effects 0.000 abstract description 13
- 230000005684 electric field Effects 0.000 abstract description 11
- 230000006978 adaptation Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 7
- 238000010304 firing Methods 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 abstract description 2
- 230000009102 absorption Effects 0.000 description 50
- 239000002912 waste gas Substances 0.000 description 27
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 23
- 239000013078 crystal Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 14
- 239000011521 glass Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 239000000377 silicon dioxide Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 239000002002 slurry Substances 0.000 description 10
- 235000013339 cereals Nutrition 0.000 description 9
- 235000013312 flour Nutrition 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 7
- HTXDPTMKBJXEOW-UHFFFAOYSA-N iridium(IV) oxide Inorganic materials O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 7
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 239000001293 FEMA 3089 Substances 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000007650 screen-printing Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 5
- 239000001856 Ethyl cellulose Substances 0.000 description 5
- 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 description 5
- 230000002159 abnormal effect Effects 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 238000000498 ball milling Methods 0.000 description 5
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 5
- 229910052681 coesite Inorganic materials 0.000 description 5
- 229910052593 corundum Inorganic materials 0.000 description 5
- 229910052906 cristobalite Inorganic materials 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 229920001249 ethyl cellulose Polymers 0.000 description 5
- 235000019325 ethyl cellulose Nutrition 0.000 description 5
- 239000008240 homogeneous mixture Substances 0.000 description 5
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- 229910052682 stishovite Inorganic materials 0.000 description 5
- RBNWAMSGVWEHFP-UHFFFAOYSA-N trans-p-Menthane-1,8-diol Chemical compound CC(C)(O)C1CCC(C)(O)CC1 RBNWAMSGVWEHFP-UHFFFAOYSA-N 0.000 description 5
- 229910052905 tridymite Inorganic materials 0.000 description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 229910021419 crystalline silicon Inorganic materials 0.000 description 3
- 208000002925 dental caries Diseases 0.000 description 3
- 239000006166 lysate Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000006187 pill Substances 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 150000001398 aluminium Chemical class 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000004332 deodorization Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000003379 elimination reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
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- 238000000746 purification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000003381 stabilizer 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
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 206010007247 Carbuncle Diseases 0.000 description 1
- 241000779819 Syncarpia glomulifera Species 0.000 description 1
- 230000004523 agglutinating effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000001739 pinus spp. Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 229940036248 turpentine Drugs 0.000 description 1
Classifications
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- 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
-
- 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
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- 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
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- Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Manufacturing & Machinery (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Inorganic Chemistry (AREA)
- Photovoltaic Devices (AREA)
- Silicon Compounds (AREA)
Abstract
Aluminium paste that polishing polycrystalline solar cell is used and preparation method thereof is carried on the back the invention provides a kind of.It solves existing aluminium paste because sintering temperature is higher, easily cause back-surface-field (BSF) paste mechanical strength inadequate, so that declining with the adaptation of base material, silicon substrate flexibility is big after firing, back of the body electric field is fallen off when forming electrode layer, good Ohmic contact, the low technical problem of photoelectric transformation efficiency can not be formed between aluminium film and silicon chip.The aluminium paste that this back of the body polishing polycrystalline solar cell is used, is made up of the raw material of following mass percent：Aluminium powder 60% 84%, organic bond 15% 35%, glassy metal powder 1% 10%, the first auxiliary agent 0.5% 2%, the mass percent sum of each raw material is 100%；And preparation method thereof.The present invention has the advantages that photoelectric transformation efficiency is high.
Description
Technical field
The invention belongs to technical field of solar cells, it is related to a kind of aluminium paste, particularly a kind of back of the body polishing polycrystalline solar cell
Aluminium paste used and preparation method thereof.
Background technology
In recent years, with the worsening shortages of traditional energy, the photovoltaic industry using crystal silicon solar energy battery as representative is obtained
Fast development, it is environmental type, the semiconductor devices of regenerative resource directly converted solar energy into electrical energy.Crystal silicon
Solar cell is substantially all using the front and rear surfaces that electric slurry is printed on to crystal silicon by silk-screen process, by sintering process
Form electrode and electric field.The need for conventional polycrystalline solar cell is due to falling into light, chemical method texture matte need to be used on surface, increased
Add surface area, by reflection/absorption to light, reduce reflectivity；But, the presence of matte also generates negative effect, suede
Face recessed position deeply can produce the phenomenon of loose contact with back side aluminium paste.By being polished to silicon chip back surface, carry on the back silicon chip
Surface is more smooth, even up to mirror effect；Silicon chip back side after back of the body polishing is smooth, on the one hand can strengthen to transmitted light
Reflection, reduces light transmittance, on the other hand aluminium paste can be made to contact more abundant with silicon chip surface, improves passivation effect, so that with
Improve the open-circuit voltage and current density of solar cell.During crystal silicon solar battery back aluminium paste is solar energy electronic slurry
Chief component, the formation for crystal silicon solar battery back surface field.
Through retrieval, such as Chinese patent literature discloses a kind of solar cell nanometer aluminium paste and preparation method thereof【Application number：
201110046368.8；Publication number：CN102169739A】.This solar cell nanometer aluminium paste, it is characterised in that：By 50~
The organic carrier composition of the Al alloy powder of 80 parts by weight, the inorganic binder of 2~10 parts by weight and 20~40 parts by weight.
Although aluminium paste disclosed in the patent can be widely used in crystal-silicon solar cell, still, organic in the aluminium paste
Adhesive contains to volatilize seriously in low toxicity material, preparation process, and harm to the human body is big, and pollution environment；Due to sintering temperature
It is higher, back-surface-field (BSF) paste mechanical strength is easily caused not enough, so that declining with the adaptation of base material, silicon substrate flexibility after firing
Greatly, back of the body electric field is fallen off when forming electrode layer, and good Ohmic contact, opto-electronic conversion can not be formed between aluminium film and silicon chip
Efficiency is low, therefore, and it is necessary to design a kind of aluminium paste that polishing polycrystalline solar cell is used and preparation method thereof of carrying on the back.
The content of the invention
First purpose of the present invention is there is above mentioned problem for existing technology, it is proposed that one kind back of the body polishing polycrystalline is too
The aluminium paste that positive electricity pond is used, the aluminium paste has the characteristics of photoelectric transformation efficiency is high.
First purpose of the present invention can be realized by following technical proposal：The aluminium that back of the body polishing polycrystalline solar cell is used
Slurry, it is characterised in that be made up of the raw material of following mass percent：Aluminium powder 60%-84%, organic bond 15%-35%, gold
Belong to glass dust 1%-10%, the first auxiliary agent 0.5%-2%, the mass percent sum of each raw material is 100%.
Using above component, by using aluminium powder as main component, and appropriate organic bond, metal are with the addition of wherein
Glass dust and the first auxiliary agent, the unleaded conducting aluminum paste is printed on the back side of solar cell through silk-screen printing technique, in peak temperature
Under conditions of 780-810 DEG C, strong adhesive force, the back of the body electric field of high reliability can be formed after sintering 1-2s, its heat resistance and resistance to
Sintering character is high, and the adaptation of aluminium film and silicon chip surface is good, and back of the body electric field can be made difficult for drop-off, and photoelectric transformation efficiency is high.
The aluminium powder is spherical aluminium powder, and average grain diameter is 1-6 μm, and purity is 99.9-99.99%.
Using the structure, when average grain diameter is less than 1 μm, it is premature melting in sintering process to easily cause aluminium powder, makes burning
Knot aluminium film is excessively fine and close, and crystal silicon surface is easily bent；When average grain diameter is more than 6 μm, in sintering, aluminium powder is difficult to melt, institute's shape
Into aluminium film it is excessively loose, can not fully be contacted between ball aluminum powder particle, influence electric conductivity, so as to influence solar-electricity
The transformation efficiency in pond.
The glassy metal powder is made up of the raw material of following mass percent：Bi2O320-60%, ZnO 5%-15%,
Al2O315-30%, SiO210-25%, B2O35-25%, IrO25%-15%.
Because the bending of silicon and the linear expansion coefficient of glass are relevant, the linear expansion coefficient of silicon and glass closer to,
The curve of crystal silicon is smaller so that adaptation of the aluminium paste after sintering with crystal silicon surface is better, and back of the body electric field is more difficult for drop-off；
A certain proportion of Al and Zn elements are added in glassy metal powder, the heat resistance and sintering character of aluminium paste is improved, burns aluminium paste
Attachment of the aluminium film to silicon chip after knot is more firm, forms good Ohmic contact, improves the photoelectric transformation efficiency of battery；And
And do not add in Pb elements, preparation process and human body will not be damaged in glassy metal powder, the feature of environmental protection is good；In glassy metal powder
Add the good IrO of wellability2, by regulating and controlling IrO2Consumption the linear expansion coefficient of glass is closer to crystal silicon so that
The flexural deformation of silicon is reduced, product quality is stable.
The organic bond is made up of the raw material of following mass percent：Terpinol 30%-50%, turpentine oil 5%-
15%, butyl carbitol acetate 5-20%, ethyl cellulose 15-35%, the second auxiliary agent 0.5%-2%.
Second auxiliary agent is that, for improving the net performance excessively of aluminium paste, the second auxiliary agent can select tackifier, stabilizer, disperse
Agent, levelling agent and Span；The second auxiliary agent is used in aluminium paste, the interconnection between organic bond is improved, enhances slurry
The levelability of material, improves the printing adaptability of aluminium paste, and improve slurry crosses net performance；Turpentine is added in organic bond
Oil, can produce reducing atmosphere during sintering, protection aluminium powder is not oxidized, improves the electric conductivity of aluminium film, and conductive effect is good.
Second object of the present invention is there is above mentioned problem for existing technology, it is proposed that a kind of preparation side of aluminium paste
Method, the preparation method has the characteristics of technique is simple.
Second object of the present invention can be realized by following technical proposal：The preparation method of aluminium paste, it is characterised in that
Comprise the following steps：
A, glassy metal powder preparation：The raw material of preparing metal glass dust is weighed by formula rate, after being well mixed, is being dried
In 140-150 DEG C of dry 1-2h in case, 0.5-1.0h then is preheated at 600-800 DEG C, then at melting at 1200-1300 DEG C
1h, is dried with after deionized water water quenching, then carries out ball milling 20-24h, and being sieved after drying, it is unleaded less than 8 μm to obtain average grain diameter
Glassy metal powder；
B, organic bond preparation：The raw material for preparing organic bond is weighed by formula rate, after being well mixed,
1.2-4h is dissolved by heating at 70-120 DEG C；
It is prepared by c, aluminium paste：, will be made in glassy metal powder prepared in aluminium powder, step a, step b according to formula rate
Standby organic bond and the first auxiliary agent is poured into de-airing mixer, persistently stirs 1h, homogeneous mixture is formed, then through three
Roll milling apparatus is scattered to grind to form homogeneous slurry, obtains the aluminium paste that fineness is less than 15 μm.
Using above method, the step of its making can be greatly reduced, and multioperation is crossed without artificial, technique is simple.
Need to be ground scattered in the step a after the raw material mixing of glass dust, after color is homogeneous, then dried
It is dry.
After organic bond preparation need to first stir non-solid raw material in the step b, then it is gradually added solid
Body raw material and the second auxiliary agent.
Three roll milling apparatus described in step c include being fixed with mixer, bottom plate that be provided with can be right on bottom plate, bottom plate
Be provided with some electric heating tubes in the treating column that tail gas in mixer is handled, treating column, electric heating tube by circuit with
Frequency converter is connected, and the controlling organization that frequency converter can be controlled to act is provided with bottom plate；The import for the treatment of column and delivery pipe one end phase
Connection, the delivery pipe other end is connected with mixer, is provided with magnetic valve, bottom plate that be provided with can be by delivery pipe in delivery pipe
The gas storage mechanism that is temporarily stored of tail gas, gas storage mechanism includes air bag, input pipe and efferent duct, input pipe one end and air bag
Import be connected, the input pipe other end is connected with delivery pipe, be disposed with input pipe the first check valve and first electricity
Magnet valve, efferent duct one end is connected with the outlet of air bag, and the efferent duct other end is connected with delivery pipe, is set gradually on efferent duct
There are the second check valve and the second magnetic valve, and input pipe and efferent duct are located at magnetic valve both sides respectively；Energy is additionally provided with bottom plate
The cooling body cooled down to treating column.
The operation principle of three roll milling apparatus is as follows：The waste gas with silica flour can be produced in mixer production process, with silicon
The waste gas of powder is discharged into delivery pipe, is opened the waste gas with silica flour in magnetic valve, delivery pipe and is entered treating column, passes through electric heating tube
Heating makes the waste gas burning with silica flour, forms SiO 2 powder；When treating column failure, magnetic valve is closed, first is opened
The waste gas with silica flour enters input pipe in magnetic valve, delivery pipe, is then entered by the first check valve in air bag, pending fault disappears
After removing, the first magnetic valve is closed, the waste gas opened in magnetic valve and the second magnetic valve, air bag enters in efferent duct, then passes through
Second check valve enters in delivery pipe, waste gas is not handled because for the treatment of column failure and is discharged into the external world, and processing is reliable；
The cooling body that can be cooled down to treating column is additionally provided with bottom plate, treating column is cooled down using cooling body, makes place
Reason tower will not produce failure because temperature is too high, and the processing duration is long, and sustainability can be good.
The controlling organization includes controller and warning lamp, and warning lamp is fixed on bottom plate, frequency converter and warning lamp with the control
Device is connected.
Using above structure, when treating column failure, frequency converter transmits signal to controller, and controller transmits signal to police
Lamp, suggesting effect is good；After treating column Failure elimination, controller control frequency converter work, frequency converter makes electric heating tube work again
Make.
The prompting mechanism that air bag can be pointed out abnormal is additionally provided with the bottom plate, prompting mechanism includes pressure sensor, police
Bell and display, pressure sensor are arranged on input pipe, and display is fixed on bottom plate, pressure sensor, alarm bell and display
Device is connected with controller noted above.
Using above structure, input pipe exception is detected by pressure sensor, abnormal signal is then delivered to control
Signal is delivered to display and alarm bell by device, controller simultaneously, and alarm bell sends alarm, and warning function is good.
The magnetic valve, the first magnetic valve and the second magnetic valve are connected with controller noted above.
Using above structure, magnetic valve, the first magnetic valve, the second electromagnetism valve events, intelligent journey are controlled by controller
Degree is high.
The controller is PLC.
The cooling body includes some blower fans, mounting ring, guide rail, sliding block, motor and steel wire rope, and guide rail is fixed on vertically
On bottom plate, sliding block is arranged on guide rail, and motor is fixed on guide rail upper end, and steel wire rope one end is connected with the output shaft of motor, steel wire
The rope other end is connected with sliding block, and mounting ring is fixed on sliding block, and treating column is located in mounting ring, and some blower fans are arranged on installation
On ring, and blower fan air outlet upward.
Using above structure, steel wire rope is driven to act by motor work, rope belt movable slider is moved up and down along guide rail,
And then moved up and down with the mounting ring on movable slider, move up and down the blower fan in mounting ring, so as to accelerate the heat outside treating column
Air is discharged upwards, and cooling effect is good.
The guide rail upper end is fixed with upper stroke switch by the first spring, and guide rail lower end second spring is fixed with down stroke
Switch, upper stroke switch, lower stroke switch are connected with motor.
Using above structure, when moving to the upper stroke switch on highest the first spring of touching in mounting ring, up stroke is opened
Pass, which sends signal, makes motor reversal, moves down mounting ring, when the down stroke that mounting ring is displaced downwardly in minimum touching second spring is opened
Guan Shi, lower stroke switch, which sends signal, rotates forward motor, moves up mounting ring.
Multi-stage treatment units, including exhaust tower are additionally provided with the bottom plate, exhaust tower is fixed on bottom plate, exhaust tower leads to
Cross and be connected with the outlet for the treatment of column communicating pipe, be fixed with bottom plate in first grade absorption tower and two-level absorption tower, first grade absorption tower
Demarcation strip one is vertically arranged with, first grade absorption tower is divided into left cavity and right cavity by demarcation strip one, if being offered on demarcation strip one
Dry through hole, the left cavity lower end of first grade absorption tower is connected with air inlet pipe one, and the right cavity upper end of first grade absorption tower is connected with outlet
Being horizontally disposed with Guan Yi, two-level absorption tower has demarcation strip two, and two-level absorption tower is separated into upper plenum and lower cavity by demarcation strip two,
The upper plenum of two-level absorption tower is connected with air inlet pipe two, and the lower cavity of two-level absorption tower is connected with escape pipe two, and escape pipe two
It is connected with exhaust tower, cavity is connected with connecting tube one under two-level absorption tower, the other end of connecting tube one is arranged on two grades of absorptions
Connecting tube two is connected between tower upper plenum, and escape pipe one and air inlet pipe two；A circulating water pool is further fixed on the bottom plate,
Circulating water pool is connected with outlet pipe, and the other end of outlet pipe is connected with the right cavity of first grade absorption tower, circulating water pool be connected with into
Water pipe, the water inlet pipe other end is connected with cavity under two-level absorption tower.
The waste gas burnt is entered in first grade absorption tower by air inlet pipe one, and the water in circulating water pool passes through outlet pipe energy
It is enough to be sprayed into first grade absorption tower, waste gas is absorbed, and through hole is offered on demarcation strip one primarily serve filtering
Effect, meanwhile, waste gas and water in first grade absorption tower are flowed out by escape pipe one, and are entered by connecting tube two and air inlet pipe two
In the upper plenum of two-level absorption tower, then in the upper plenum that connecting tube one enters two-level absorption tower, so that multistage purification is realized,
Two-level absorption tower purified gas enters exhaust tower by escape pipe two and discharged, and the water of two-level absorption tower is entered by water inlet pipe
Enter to circulating water pool interior circulation and utilize.
Screen pack is provided with the demarcation strip one.
Screen pack primarily serves the effect filtered to the progress for entering the waste gas in first grade absorption tower.
The exhaust tower has inner chamber, and the upper end of exhaust tower, which is provided with gas outlet, described exhaust tower, to be horizontally fixed with
Offer some filter bores on demarcation strip three, and demarcation strip three, described demarcation strip three by exhaust tower inner chamber from top to bottom successively
It is separated into inner chamber and lower inner cavity.
Exhaust tower is separated on upper inner chamber and lower inner cavity, and demarcation strip three and offers filter bores by demarcation strip three, so that right
Waste gas carries out refiltering processing.
Some ultraviolet radiators are provided with the exhaust tower lower inner cavity.
Ultraviolet radiator in exhaust tower lower inner cavity can carry out sterilization processing to waste gas.
Under the two-level absorption tower activated carbon is also coated with the inwall of cavity.
Activated carbon under two-level absorption tower in cavity can buy existing product in the market, can play to exhaust air deodorization
Effect.
Compared with prior art, aluminium paste that this back of the body polishing polycrystalline solar cell is used and preparation method thereof has following excellent
Point：
1st, in this aluminium paste by using aluminium powder as main component, and appropriate organic bond, metal glass are with the addition of wherein
Glass powder and the first auxiliary agent, the unleaded conducting aluminum paste are printed on the back side of solar cell through silk-screen printing technique, are in peak temperature
Under conditions of 780-810 DEG C, strong adhesive force, the back of the body electric field of high reliability, its heat resistance and resistance to burning can be formed after sintering 1-2s
Knot performance is high, and the adaptation of aluminium film and silicon chip surface is good, and back of the body electric field can be made difficult for drop-off, and photoelectric transformation efficiency is high.
2nd, a certain proportion of Al and Zn elements are added in glassy metal powder, the heat resistance and agglutinating property of aluminium paste is improved
Can, make attachment of the aluminium film after aluminium paste sintering to silicon chip more firm, form good Ohmic contact, and in glassy metal powder
Not adding in Pb elements, preparation process will not damage to human body, and the feature of environmental protection is good.
3rd, in three roll milling apparatus when treating column failure, the waste gas with silica flour can enter input pipe in delivery pipe, pass through
First check valve enters in air bag, after pending fault is eliminated, and the waste gas in air bag enters in efferent duct, is entered by the second check valve
In delivery pipe, waste gas is set not handle because for the treatment of column failure and be discharged into the external world, processing is reliable.
4th, input pipe exception is detected by pressure sensor, abnormal signal is then delivered to controller, controller will
Signal is delivered to display and alarm bell simultaneously, and alarm bell sends alarm, and warning function is good.
Brief description of the drawings
Fig. 1 is the planar structure schematic diagram that three roll milling apparatus remove part.
Fig. 2 is the cross section structure diagram that three roll milling apparatus remove part.
In figure, 1, bottom plate；2nd, controller；3rd, display；4th, warning lamp；5th, electric heating tube；6th, treating column；7th, second spring；
8th, guide rail；9th, lower stroke switch；10th, sliding block；11st, mounting ring；12nd, blower fan；13rd, steel wire rope；14th, upper stroke switch；15th, first
Spring；16th, motor；17th, frequency converter；18th, efferent duct；19th, magnetic valve；20th, delivery pipe；21st, input pipe；22nd, the first magnetic valve；
23rd, pressure sensor；24th, the first check valve；25th, air bag；26th, the second check valve；27th, the second magnetic valve；28th, alarm bell；51st, arrange
Gas tower；52nd, first grade absorption tower；53rd, two-level absorption tower；54th, demarcation strip one；55th, air inlet pipe one；56th, escape pipe one；57th, separate
Plate two；58th, air inlet pipe two；59th, escape pipe two；60th, connecting tube one；61st, connecting tube two；62nd, circulating water pool；63rd, outlet pipe；
64th, water inlet pipe；65th, demarcation strip three；66th, ultraviolet radiator.
Embodiment
The following is specific embodiment of the invention and with reference to accompanying drawing, technical scheme is further described,
But the present invention is not limited to these embodiments.
The aluminium paste that this carbuncle on the back polishing polycrystalline solar cell is used, is made up of the raw material of following mass percent：Aluminium powder 60%-
84%, organic bond 15%-35%, glassy metal powder 1%-10%, the first auxiliary agent 0.5%-2%, the quality hundred of each raw material
It is 100% to divide than sum；Using the component, by using aluminium powder as main component, and appropriate organic is with the addition of wherein
Agent, glassy metal powder and the first auxiliary agent, the unleaded conducting aluminum paste is printed on the back side of solar cell through silk-screen printing technique, at peak
It is worth temperature under conditions of 780-810 DEG C, strong adhesive force, the back of the body electric field of high reliability, its heat resistance can be formed after sintering 1-2s
Can be high with sintering resistance energy, the adaptation of aluminium film and silicon chip surface is good, and back of the body electric field can be made difficult for drop-off, and photoelectric transformation efficiency is high.
Aluminium powder is spherical aluminium powder, and average grain diameter is 1-6 μm, and purity is 99.9-99.99%；Using the structure, when average grain
When footpath is less than 1 μm, it is premature melting in sintering process to easily cause aluminium powder, makes sintering aluminium film excessively fine and close, crystal silicon surface is easy
Bending；When average grain diameter is more than 6 μm, in sintering, aluminium powder is difficult to melt, and the aluminium film formed is excessively loose, ball aluminum powder
It can not fully be contacted between grain, electric conductivity be influenceed, so as to influence the transformation efficiency of solar cell.
Glassy metal powder is made up of the raw material of following mass percent：Bi2O320-60%, ZnO 5%-15%, Al2O3
15-30%, SiO210-25%, B2O35-25%, IrO25%-15%；Because the bending of silicon and the line of glass expand
Coefficient is relevant, the linear expansion coefficient of silicon and glass closer to the curve of crystal silicon is smaller so that aluminium paste after sintering with
The adaptation on crystal silicon surface is better, and back of the body electric field is more difficult for drop-off；A certain proportion of Al and Zn elements are added in glassy metal powder,
The heat resistance and sintering character of aluminium paste are improved, makes attachment of the aluminium film after aluminium paste sintering to silicon chip more firm, forms good
Ohmic contact, improve the photoelectric transformation efficiency of battery；And not adding in glassy metal powder will not in Pb elements, preparation process
Human body is damaged, the feature of environmental protection is good；The good IrO of wellability is added in glassy metal powder2, by regulating and controlling IrO2Consumption
The linear expansion coefficient of glass is set to be closer to crystal silicon, so as to reduce the flexural deformation of silicon, product quality is stable.
Organic bond is made up of the raw material of following mass percent：Terpinol 30%-50%, turpentine oil 5%-15%,
Butyl carbitol acetate 5-20%, ethyl cellulose 15-35%, the second auxiliary agent 0.5%-2%；Second auxiliary agent is for improving
The net performance excessively of aluminium paste, the second auxiliary agent can select tackifier, stabilizer, dispersant, levelling agent and Span；The is used in aluminium paste
Two auxiliary agents, improve the interconnection between organic bond, enhance the levelability of slurry, and the printing for improving aluminium paste is fitted
Ying Xing, improve slurry crosses net performance；Turpentine oil is added in organic bond, reducing atmosphere can be produced during sintering, aluminium is protected
Powder is not oxidized, improves the electric conductivity of aluminium film, and conductive effect is good.
The preparation method of this aluminium paste, comprises the following steps：
A, glassy metal powder preparation：The raw material of preparing metal glass dust is weighed by formula rate, after being well mixed, is being dried
In 140-150 DEG C of dry 1-2h in case, 0.5-1.0h then is preheated at 600-800 DEG C, then at melting at 1200-1300 DEG C
1h, is dried with after deionized water water quenching, then carries out ball milling 20-24h, and being sieved after drying, it is unleaded less than 8 μm to obtain average grain diameter
Glassy metal powder；Need to be ground scattered in step a after the raw material mixing of glass dust, after color is homogeneous, then dried；
B, organic bond preparation：The raw material for preparing organic bond is weighed by formula rate, after being well mixed,
1.2-4h is dissolved by heating at 70-120 DEG C；After organic bond preparation need to first stir non-solid raw material in step b,
Solid material and auxiliary agent are gradually added again；
It is prepared by c, aluminium paste：, will be made in glassy metal powder prepared in aluminium powder, step a, step b according to formula rate
Standby organic bond and the first auxiliary agent is poured into de-airing mixer, persistently stirs 1h, homogeneous mixture is formed, then through three
Roll milling apparatus is scattered to grind to form homogeneous slurry, obtains the aluminium paste that fineness is less than 15 μm.
Using this method, the step of its making can be greatly reduced, and multioperation is crossed without artificial, technique is simple；At this
In embodiment, the first auxiliary agent and the second auxiliary agent use Span.
It is fixed with as shown in figure 1, three roll milling apparatus in step c include on bottom plate 1, bottom plate 1 on mixer, bottom plate 1
It is provided with the treating column 6 that can be handled the tail gas in mixer, treating column 6 and is provided with some electric heating tubes 5, in this reality
Apply in example, the quantity of electric heating tube 5 is three；Electric heating tube 5 is connected by circuit with frequency converter 17, and energy is provided with bottom plate 1
The controlling organization for controlling frequency converter 17 to act；The import for the treatment of column 6 is connected with the one end of delivery pipe 20, and the material of delivery pipe 20 is
Iron, treating column 6 is connected with delivery pipe 20 by way of welding, and the other end of delivery pipe 20 is connected with mixer, delivery pipe
The gas storage mechanism that is provided with and the tail gas in delivery pipe 20 can temporarily be stored on magnetic valve 19, bottom plate 1 is provided with 20, is stored up
Mechanism of qi structure includes air bag 25, input pipe 21 and efferent duct 18, and the import of the one end of input pipe 21 and air bag 25 is connected, input pipe 21
The import of one end and air bag 25 is connected by sealing strip, and the other end of input pipe 21 is connected with delivery pipe 20, on input pipe 21 according to
Secondary to be provided with the first check valve 24 and the first magnetic valve 22, the outlet of the one end of efferent duct 18 and air bag 25 is connected, efferent duct 18
The other end is connected with delivery pipe 20, and the second check valve 26 and the second magnetic valve 27, and input are disposed with efferent duct 18
Pipe 21 and efferent duct 18 are located at the both sides of magnetic valve 19 respectively；The cooler that can be cooled down to treating column 6 is additionally provided with bottom plate 1
Structure.
As shown in figure 1, controlling organization includes controller 2 and warning lamp 4, warning lamp 4 is fixed on bottom plate 1, and warning lamp 4 passes through bolt
The mode of connection is fixed on bottom plate 1, and frequency converter 17 and warning lamp 4 are connected with the controller 2, in the present embodiment, controller 2
The single-chip microcomputer that can be bought using in the market, single-chip microcomputer controls the program of magnetic valve, bell, sensor, frequency converter and lamp to be existing,
Its program need not be updated；Using above structure, when 6 failure for the treatment of column, in the present embodiment, failure is of short duration disconnected
Electricity, the transmission signal of frequency converter 17 to controller 2, the transmission signal of controller 2 to warning lamp 4, suggesting effect is good；When the failure for the treatment of column 6
After elimination, the control frequency converter 17 of controller 2 works, and frequency converter 17 makes electric heating tube 5 rework；Certainly, frequency converter 17 also may be used
To be connected by circuit with air exhauster.
As shown in figure 1, being additionally provided with the prompting mechanism that air bag 25 can be pointed out abnormal on bottom plate 1, prompting mechanism includes pressure
Sensor 23, alarm bell 28 and display 3, pressure sensor 23 are arranged on input pipe 21, and display 3 is fixed on bottom plate 1, are shown
Show that the mode that device 3 is bolted is fixed on bottom plate 1, pressure sensor 23, alarm bell 28 and display 3 with controller 2
It is connected, using above structure, the exception of input pipe 21 is detected by pressure sensor 23, abnormal signal is then delivered to control
Signal is delivered to display 3 and alarm bell 28 by device 2, controller 2 simultaneously, and alarm bell 28 sends alarm, and warning function is good.
As shown in figure 1, magnetic valve 19, the first magnetic valve 22 and the second magnetic valve 27 are connected with controller 2, more than
Structure, controls magnetic valve 19, the first magnetic valve 22, the second magnetic valve 27 to act by controller 2, and intelligence degree is high；Control
Device 2 is PLC.
As shown in figure 1, cooling body includes some blower fans 12, mounting ring 11, guide rail 8, sliding block 10, motor 16 and steel wire rope
13, guide rail 8 is fixed on bottom plate 1 vertically, and guide rail 8 is fixed on by way of welding on bottom plate 1, and sliding block 10 is arranged on guide rail 8
On, motor 16 is fixed on the upper end of guide rail 8, and the mode that motor 16 is bolted is fixed on the upper end of guide rail 8, the one end of steel wire rope 13
It is connected with the output shaft of motor 16, the other end of steel wire rope 13 is connected with sliding block 10, mounting ring 11 is fixed on sliding block 10, mounting ring
11 are fixed on by way of welding on sliding block 10, and treating column 6 is located in mounting ring 11, and some blower fans 12 are arranged on mounting ring
On 11, in the present embodiment, the quantity of blower fan 12 is six, and blower fan 12 air outlet upward, using above structure, pass through electricity
The work of machine 16 drives steel wire rope 13 to act, and steel wire rope 13 is moved up and down with movable slider 10 along guide rail 8, and then with movable slider 10
Mounting ring 11 is moved up and down, and moves up and down the blower fan 12 in mounting ring 11, so that the hot-air accelerated outside treating column 6 is arranged upwards
Go out, cooling effect is good.
As shown in figure 1, the upper end of guide rail 8 is fixed with upper stroke switch 14, the lower end second spring of guide rail 8 by the first spring 15
7 are fixed with lower stroke switch 9, and upper stroke switch 14, lower stroke switch 9 are connected with motor 16, using above structure, work as installation
When the upper stroke switch 14 on highest the first spring 15 of touching is moved on ring 11, upper stroke switch 14, which sends signal, makes motor 16 anti-
Turn, move down mounting ring 11, when mounting ring 11 is displaced downwardly to the lower stroke switch 9 in minimum touching second spring 7, down stroke is opened
Pass 9, which sends signal, rotates forward motor 16, moves up mounting ring 11.
As shown in Fig. 2 be additionally provided with multi-stage treatment units on bottom plate 1, including exhaust tower 51, exhaust tower 51 is fixed on bottom plate
On 1, exhaust tower 51 is connected by the outlet of communicating pipe and treating column 6, and first grade absorption tower 52 and two grades of suctions are fixed with bottom plate 1
Receive tower 53；Demarcation strip 1 is vertically arranged with first grade absorption tower 52, first grade absorption tower 52 is divided into left cavity by demarcation strip 1
With right cavity, offer on demarcation strip 1 and screen pack is provided with through hole, and demarcation strip 1, screen pack is primarily served to entering
Enter the effect that the waste gas in first grade absorption tower 52 is filtered；The left cavity lower end of first grade absorption tower 52 is connected with air inlet pipe one
55, the right cavity upper end of first grade absorption tower 52, which is connected with to be horizontally disposed with escape pipe 1, two-level absorption tower 53, demarcation strip two
57, two-level absorption tower 53 is separated into upper plenum and lower cavity by demarcation strip 2 57, the upper plenum of two-level absorption tower 53 be connected with into
Tracheae 2 58, the lower cavity of two-level absorption tower 53 is connected with escape pipe 2 59, and escape pipe 2 59 is connected with exhaust tower 51, and two
Level absorption tower 53 times cavity is connected with connecting tube 1, and the other end of connecting tube 1 is arranged on the upper plenum of two-level absorption tower 53,
And connecting tube 2 61 is connected between escape pipe 1 and air inlet pipe 2 58；
A circulating water pool 62 is further fixed on shown in Fig. 2, in frame, circulating water pool 62 is connected with outlet pipe 63, outlet pipe 63
The other end be connected with the right cavity of first grade absorption tower 52, circulating water pool 62 is connected with water inlet pipe 64, the other end of water inlet pipe 64 with
53 times cavitys of two-level absorption tower are connected；Exhaust tower 51 has inner chamber, and the upper end of exhaust tower 51 is provided with gas outlet, exhaust tower 51
Inside it is horizontally fixed with demarcation strip 3 65, and demarcation strip 3 65 and offers some filter bores, demarcation strip 3 65 is by exhaust tower 51
Chamber is separated into inner chamber and lower inner cavity successively from top to bottom；Exhaust tower 51 is separated into upper inner chamber and lower inner cavity by demarcation strip 3 65,
And filter bores are offered on demarcation strip 3 65, so as to carry out refiltering processing to waste gas；If being provided with the lower inner cavity of exhaust tower 51
Ultraviolet radiator 66 in dry ultraviolet radiator 66, the lower inner cavity of exhaust tower 51 can carry out sterilization processing to waste gas.
Shown in Fig. 2, it is also coated with the inwall of 53 times cavitys of two-level absorption tower in activated carbon, 53 times cavitys of two-level absorption tower
Activated carbon is that in the market can buy existing product, can be played a part of to exhaust air deodorization.
The operation principle of three roll milling apparatus is as follows：The waste gas with silica flour can be produced in mixer production process, with silicon
The waste gas of powder is discharged into delivery pipe 20, and the waste gas that silica flour is carried in magnetic valve 19, delivery pipe 20 is opened at by controller 2
Tower 6 is managed, controls frequency converter 17 to work by controller 2, frequency converter 17 makes electric heating tube 5 work, the waste gas with silica flour is fired
Burn, form SiO 2 powder；When 6 failure for the treatment of column, magnetic valve 19 is closed by controller 2, then by controller 2 dozens
Open the waste gas with silica flour in the first magnetic valve 22, delivery pipe 20 and enter input pipe 21, then entered by the first check valve 24
In air bag 25, after pending fault is eliminated, the first magnetic valve 22 is closed by controller 2, magnetic valve 19 is then opened by controller 2
With the second magnetic valve 27, the waste gas in air bag 25 enters in efferent duct 18, then passes through the second check valve 26 and enters delivery pipe 20
In；The waste gas burnt is entered in first grade absorption tower 52 by air inlet pipe 1, and the water in circulating water pool 62 passes through outlet pipe
63 can be sprayed into first grade absorption tower 52, and the effect that through hole primarily serves filtering is offered on demarcation strip 1, together
When, 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 enters
Entered into the upper plenum of two-level absorption tower 53, then by connecting tube 1 in the upper plenum of two-level absorption tower 53, so as to realize
Multistage purification, the purified gas of two-level absorption tower 53 enters exhaust tower 51 by escape pipe 2 59 and discharged, and two grades of absorptions
The water of tower 53 enters the interior circulation of circulating water pool 62 by water inlet pipe 64 and utilized.
The embodiment one of preparation method：
A, glassy metal powder preparation：Weigh Bi2O338.2%, ZnO 6.5%, Al2O317.4%, SiO222.2%,
B2O38.2%, IrO27.5%, after being well mixed, in an oven in 150 DEG C of dry 1.5h, then preheated at 750 DEG C
1.0h, the melting 1h at 1250 DEG C, are dried with after deionized water water quenching, then carry out ball milling 22h, and sieving is averaged after drying
Particle diameter is less than 8 μm of unleaded glassy metal powder；
B, organic bond preparation：Weigh terpinol 48.3%, turpentine oil 13.5%, butyl carbitol acetate
17.8%, ethyl cellulose 19.1%, Span 1.3% after being well mixed, dissolves by heating 3h, until lysate is clear at 115 DEG C
It is clear transparent for extremely；
It is prepared by c, aluminium paste：By aluminium powder 68.5%, glassy metal powder 3.2%, organic bond 27.5%, Span 0.8% is fallen
Enter into de-airing mixer, persistently stir 1h, form homogeneous mixture, then grind to form equal chylema through three roll milling apparatus are scattered
Material, obtains the aluminium paste that fineness is 13 μm, viscosity is 41PaS.
Polycrystalline silicon solar cell piece by the aluminium paste in embodiment one with 280 mesh screen paintings in 156mm × 156mm is carried on the back
Face, is made after cell piece according to crystalline silicon solar cell piece Making programme, is sintered under conditions of peak temperature is 780-810 DEG C
1-2s, is cooled to aluminium film gray after room temperature, smooth, without aluminium pill and aluminium bag, and appearance property is excellent；3M adhesive tapes are bonded at Al-BSF
Surface carries out 180 ° of peel tests, and test result is displayed without any dry linting phenomenon；Warpage is determined in 1.9mm or so with clearance gauge；
EVA test results show that the aluminium paste adhesive force is higher than 43N；Photoelectric transformation efficiency test is carried out with solar cell separator, is turned
Change efficiency average value and reach 18.2%；It is 780- in peak temperature by the aluminium paste with 280 mesh silk-screen printings on monocrystalline silicon piece
1-2s is sintered under conditions of 810 DEG C, room temperature is cooled to, measurement sheet resistance is 19.8m Ω/, and concrete outcome refers to table 1.
The back field aluminum paste the performance test results of table 1
The embodiment two of preparation method：
A, glassy metal powder preparation：Weigh Bi2O345.7%, ZnO 8.5%, Al2O317.3%, SiO212.0%,
B2O38.2%, IrO28.3%, after being well mixed, in an oven in 150 DEG C of dry 1.5h, then preheated at 750 DEG C
1.0h, the melting 1h at 1250 DEG C, are dried with after deionized water water quenching, then carry out ball milling 22h, and sieving is averaged after drying
Particle diameter is less than 8 μm of unleaded glassy metal powder；
B, organic bond preparation：Terpinol 42.9%, turpentine oil 14.1%, butyl carbitol acetate 13.7%,
Ethyl cellulose 28.3%, Span 1.0% after being well mixed, dissolves by heating 3h, until lysate is as clear as crystal at 115 DEG C
For extremely；
It is prepared by c, aluminium paste：By aluminium powder 71.5%, glassy metal powder 4.5%, organic bond 23.2%, Span 0.8% is fallen
Enter into de-airing mixer, persistently stir 1h, form homogeneous mixture, then grind to form equal chylema through three roll milling apparatus are scattered
Material, obtains the aluminium paste that fineness is 13 μm, viscosity is 43PaS.
Polycrystalline silicon solar cell piece by the aluminium paste in embodiment two with 280 mesh screen paintings in 156mm × 156mm is carried on the back
Face, is made after cell piece according to crystalline silicon solar cell piece Making programme, is sintered under conditions of peak temperature is 780-810 DEG C
1-2s, is cooled to aluminium film gray after room temperature, smooth, without aluminium pill and aluminium bag, and appearance property is excellent；3M adhesive tapes are bonded at Al-BSF
Surface carries out 180 ° of peel tests, and test result is displayed without any dry linting phenomenon；Warpage is determined in 1.8mm or so with clearance gauge；
EVA test results show that the aluminium paste adhesive force is higher than 46N；Photoelectric transformation efficiency test is carried out with solar cell separator, is turned
Change efficiency average value and reach 18.3%；It is 780- in peak temperature by the aluminium paste with 280 mesh silk-screen printings on monocrystalline silicon piece
1-2s is sintered under conditions of 810 DEG C, room temperature is cooled to, measurement sheet resistance is 18.2m Ω/, and concrete outcome refers to table 2.
The back field aluminum paste the performance test results of table 2
The embodiment three of preparation method：
A, glassy metal powder preparation：Weigh Bi2O348.5%, ZnO 5.5%, Al2O316.1%, SiO212.0%,
B2O39.7%, IrO28.2%, after being well mixed, in an oven in 150 DEG C of dry 1.5h, then preheated at 750 DEG C
1.0h, the melting 1h at 1250 DEG C, are dried with after deionized water water quenching, then carry out ball milling 22h, and sieving is averaged after drying
Particle diameter is less than 8 μm of unleaded glassy metal powder；
B, organic bond preparation：Terpinol 42.6%, turpentine oil 10.5%, butyl carbitol acetate 13.8%,
Ethyl cellulose 31.5%, Span 1.6% after being well mixed, dissolves by heating 3h, until lysate is as clear as crystal at 115 DEG C
For extremely；
It is prepared by c, aluminium paste：By aluminium powder 63%, glassy metal powder 5.2%, organic bond 30.5%, Span 1.3% is poured into
Into de-airing mixer, 1h is persistently stirred, homogeneous mixture is formed, then homogeneous slurry is ground to form through three roll milling apparatus are scattered,
The aluminium paste that fineness is 12 μm is obtained, viscosity is 39PaS.
Polycrystalline silicon solar cell piece by the aluminium paste in embodiment three with 280 mesh screen paintings in 156mm × 156mm is carried on the back
Face, is made after cell piece according to crystalline silicon solar cell piece Making programme, is sintered under conditions of peak temperature is 780-810 DEG C
1-2s, is cooled to aluminium film gray after room temperature, smooth, without aluminium pill and aluminium bag, and appearance property is excellent；3M adhesive tapes are bonded at Al-BSF
Surface carries out 180 ° of peel tests, and test result is displayed without any dry linting phenomenon；Warpage is determined in 2.0mm or so with clearance gauge；
EVA test results show that the aluminium paste adhesive force is higher than 41N；Photoelectric transformation efficiency test is carried out with solar cell separator, is turned
Change efficiency average value and reach 18.4%；It is 780- in peak temperature by the aluminium paste with 280 mesh silk-screen printings on monocrystalline silicon piece
1-2s is sintered under conditions of 810 DEG C, room temperature is cooled to, measurement sheet resistance is 20.3m Ω/, and concrete outcome refers to table 3.
The back field aluminum paste the performance test results of table 3
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (5)
1. three roll milling apparatus for preparing the aluminium paste that back of the body polishing polycrystalline solar cell is used, including bottom plate, it is characterised in that bottom
It is fixed with the treating column that is provided with and can be handled the tail gas in mixer on mixer, bottom plate, treating column and sets on plate
There are three electric heating tubes, electric heating tube is connected by circuit with frequency converter, the control that frequency converter can be controlled to act is provided with bottom plate
Mechanism processed；The import for the treatment of column is connected with delivery pipe one end, and the delivery pipe other end is connected with mixer, is set in delivery pipe
There is the gas storage mechanism that is provided with and the tail gas in delivery pipe can temporarily be stored on magnetic valve, bottom plate, gas storage mechanism includes gas
Capsule, input pipe and efferent duct, input pipe one end are connected with the import of air bag, and the input pipe other end is connected with delivery pipe, defeated
Enter and the first check valve and the first magnetic valve are disposed with pipe, efferent duct one end is connected with the outlet of air bag, and efferent duct is another
One end is connected with delivery pipe, and the second check valve and the second magnetic valve, and input pipe and efferent duct are disposed with efferent duct
It is located at magnetic valve both sides respectively；The cooling body that can be cooled down to treating column is additionally provided with bottom plate；The cooling body bag
Some blower fans, mounting ring, guide rail, sliding block, motor and steel wire rope are included, guide rail is fixed on bottom plate vertically, and guide rail passes through welding
Mode is fixed on bottom plate, and sliding block is arranged on guide rail, and motor is fixed on guide rail upper end, and the mode that motor is bolted is consolidated
Guide rail upper end is scheduled on, steel wire rope one end is connected with the output shaft of motor, and the steel wire rope other end is connected with sliding block, and mounting ring is fixed on
On sliding block, and treating column be located at mounting ring in, some blower fans are arranged in mounting ring, and blower fan air outlet upward；The bottom
Multi-stage treatment units, including exhaust tower are additionally provided with plate, exhaust tower is fixed on bottom plate, and exhaust tower passes through communicating pipe and processing
The outlet of tower is connected, and is fixed with bottom plate in first grade absorption tower and two-level absorption tower, first grade absorption tower and is vertically arranged with separation
Plate one, first grade absorption tower is divided on left cavity and right cavity, demarcation strip one by demarcation strip one offers some through holes, first order absorption
The left cavity lower end of tower is connected with air inlet pipe one, and the right cavity upper end of first grade absorption tower is connected with escape pipe one, two-level absorption tower
It is interior it is horizontally disposed have a demarcation strip two, two-level absorption tower is separated into upper plenum and lower cavity by demarcation strip two, two-level absorption tower it is upper
Cavity is connected with air inlet pipe two, and the lower cavity of two-level absorption tower is connected with escape pipe two, and escape pipe two is connected with exhaust tower,
Cavity is connected with connecting tube one under two-level absorption tower, and the other end of connecting tube one is arranged on two-level absorption tower upper plenum, and outlet
Connecting tube two is connected between pipe one and air inlet pipe two；A circulating water pool is further fixed on the bottom plate, circulating water pool is connected with
Outlet pipe, the other end of outlet pipe is connected with the right cavity of first grade absorption tower, and circulating water pool is connected with water inlet pipe, and water inlet pipe is another
End is connected with cavity under two-level absorption tower；The controlling organization includes controller and warning lamp, and warning lamp is fixed on bottom plate, warning lamp
The mode being bolted is fixed on bottom plate, and frequency converter and warning lamp are connected with the controller；The controller is that PLC can
Programmable controller.
2. three roll milling apparatus according to claim 1 for being used to prepare the aluminium paste that back of the body polishing polycrystalline solar cell is used, its
It is characterised by, screen pack is provided with the demarcation strip one.
3. three roll milling apparatus according to claim 1 for being used to prepare the aluminium paste that back of the body polishing polycrystalline solar cell is used, its
It is characterised by, the exhaust tower has inner chamber, the upper end of exhaust tower, which is provided with gas outlet, described exhaust tower, to be horizontally fixed with
Offer some filter bores on demarcation strip three, and demarcation strip three, described demarcation strip three by exhaust tower inner chamber from top to bottom successively
It is separated into inner chamber and lower inner cavity.
4. three roll milling apparatus according to claim 3 for being used to prepare the aluminium paste that back of the body polishing polycrystalline solar cell is used, its
It is characterised by, some ultraviolet radiators is provided with the exhaust tower lower inner cavity.
5. three roll milling apparatus according to claim 3 for being used to prepare the aluminium paste that back of the body polishing polycrystalline solar cell is used, its
It is characterised by, activated carbon is also coated with the inwall of cavity under the two-level absorption tower.
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| CN201710815137.6A CN107689263B (en) | 2016-05-20 | 2016-05-20 | A kind of preparation method for the aluminium paste that back polishing polycrystalline solar cell uses |
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| CN101721832B (en) * | 2008-10-28 | 2012-02-29 | 中国石油化工股份有限公司 | Method for treating discharged waste gas of acid water tank area |
| CN201445909U (en) * | 2009-03-17 | 2010-05-05 | 常州市武进庙桥第二化工有限公司 | Recovery plant for tail gas produced by silver nitrate |
| JP5437734B2 (en) * | 2009-08-07 | 2014-03-12 | 株式会社荏原製作所 | Combustion exhaust gas treatment equipment |
| CN101728439B (en) * | 2009-12-01 | 2011-07-20 | 洛阳神佳电子陶瓷有限公司 | Aluminum pulp composition of crystal silicon solar cell and preparation method thereof |
| CN102142467B (en) * | 2010-01-29 | 2013-07-03 | 比亚迪股份有限公司 | Solar cell back electric field aluminium paste and preparation method thereof |
| CN101826564B (en) * | 2010-05-11 | 2011-10-05 | 中国乐凯胶片集团公司 | Solar cell back surface field aluminum paste |
| CN201724852U (en) * | 2010-07-20 | 2011-01-26 | 镇海石化建安工程有限公司 | Gas bag sealing sampler |
| KR101350960B1 (en) * | 2012-01-13 | 2014-01-16 | 한화케미칼 주식회사 | Glass frits, conductive paste composition comprising the same and solar cell |
| CN103545013B (en) * | 2013-07-29 | 2016-06-08 | 广州市儒兴科技开发有限公司 | A kind of local aluminum special aluminium paste of back surface field crystal-silicon solar cell and preparation method thereof |
| CN104835878A (en) * | 2015-04-30 | 2015-08-12 | 广东汉能薄膜太阳能有限公司 | Tail gas treatment system and tail gas treatment method used for thin-film solar cell |
| CN105845756B (en) * | 2016-05-20 | 2017-07-14 | 浙江光隆能源科技股份有限公司 | Close main grid polycrystalline back of solar cell silver paste of grid four and preparation method thereof |
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| CN107689263A (en) | 2018-02-13 |
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