CN107731345B - The preparation method of the back of solar cell silver paste of the anti-crack of the high-tensile strength of improvement - Google Patents
The preparation method of the back of solar cell silver paste of the anti-crack of the high-tensile strength of improvement Download PDFInfo
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- CN107731345B CN107731345B CN201711104607.4A CN201711104607A CN107731345B CN 107731345 B CN107731345 B CN 107731345B CN 201711104607 A CN201711104607 A CN 201711104607A CN 107731345 B CN107731345 B CN 107731345B
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- 230000006872 improvement Effects 0.000 title claims abstract description 16
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title abstract description 86
- 229910052709 silver Inorganic materials 0.000 title abstract description 43
- 239000004332 silver Substances 0.000 title abstract description 43
- 238000002360 preparation method Methods 0.000 title abstract description 34
- 238000010521 absorption reaction Methods 0.000 claims description 62
- 238000005070 sampling Methods 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 230000007246 mechanism Effects 0.000 claims description 21
- 238000003801 milling Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 12
- 238000005485 electric heating Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 46
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 34
- 239000011521 glass Substances 0.000 abstract description 28
- 229910052710 silicon Inorganic materials 0.000 abstract description 24
- 239000010703 silicon Substances 0.000 abstract description 24
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000009864 tensile test Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 38
- 239000000853 adhesive Substances 0.000 description 16
- 230000001070 adhesive effect Effects 0.000 description 16
- 238000012360 testing method Methods 0.000 description 15
- 239000002994 raw material Substances 0.000 description 13
- 239000002002 slurry Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 12
- 238000002156 mixing Methods 0.000 description 12
- 238000003756 stirring Methods 0.000 description 12
- 239000012752 auxiliary agent Substances 0.000 description 11
- 239000000654 additive Substances 0.000 description 10
- 230000000996 additive effect Effects 0.000 description 10
- 238000001035 drying Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000011863 silicon-based powder Substances 0.000 description 10
- 230000005611 electricity Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- -1 alcohol ester Chemical class 0.000 description 8
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 239000002318 adhesion promoter Substances 0.000 description 6
- 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
- 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
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 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
- 235000019325 ethyl cellulose Nutrition 0.000 description 5
- 229920001249 ethyl cellulose Polymers 0.000 description 5
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 229910052682 stishovite Inorganic materials 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- 229910052905 tridymite Inorganic materials 0.000 description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 description 5
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 4
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 4
- 239000005751 Copper oxide Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229910000431 copper oxide Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical group O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 4
- 229910001887 tin oxide Inorganic materials 0.000 description 4
- IJCWFDPJFXGQBN-RYNSOKOISA-N [(2R)-2-[(2R,3R,4S)-4-hydroxy-3-octadecanoyloxyoxolan-2-yl]-2-octadecanoyloxyethyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](OC(=O)CCCCCCCCCCCCCCCCC)[C@H]1OC[C@H](O)[C@H]1OC(=O)CCCCCCCCCCCCCCCCC IJCWFDPJFXGQBN-RYNSOKOISA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 3
- 229920005591 polysilicon Polymers 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000001589 sorbitan tristearate Substances 0.000 description 3
- 235000011078 sorbitan tristearate Nutrition 0.000 description 3
- 229960004129 sorbitan tristearate Drugs 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 2
- 238000004332 deodorization Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000008240 homogeneous mixture Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- HVUMOYIDDBPOLL-XWVZOOPGSA-N Sorbitan monostearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XWVZOOPGSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007650 screen-printing Methods 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
- 239000002904 solvent Substances 0.000 description 1
- 239000001587 sorbitan monostearate Substances 0.000 description 1
- 235000011076 sorbitan monostearate Nutrition 0.000 description 1
- 229940035048 sorbitan monostearate Drugs 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002912 waste gas Substances 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
- H01B1/20—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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
-
- 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
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Disintegrating Or Milling (AREA)
- Photovoltaic Devices (AREA)
- Crushing And Grinding (AREA)
Abstract
The present invention provides a kind of preparation methods of the back of solar cell silver paste of the anti-crack of the high-tensile strength of improvement.It solves existing silver paste applied to after silicon chip surface, and cell piece causes in tensile test silicon layer to will appear large area and fall off, service life is short greatly all in crack state；2, the backplane pulling force of cell piece is generally in technical problems such as 2.5N.The preparation method of the back of solar cell silver paste of the anti-crack of the high-tensile strength of this improvement, comprising the following steps: the preparation of a, glass powder；B, the preparation of organic bond；C, the preparation of back side silver paste.The present invention has the advantages that properties of product are stable.
Description
Technical field
The invention belongs to solar cell photovoltaic field of material technology, are related to a kind of sun of the anti-crack of high-tensile strength of improvement
The preparation method of cell backside silver paste.
Background technique
With the exhaustion of all kinds of traditional energies and getting worse for greenhouse effects, people are for all kinds of new cleaning fuels
Demand also become more more and more urgent.Solar energy crystalline silicon photovoltaic electricity generation system is the photovoltaic effect using silion cell semiconductor,
Solar radiation energy is converted directly into a kind of new power generating system of electric energy, it has the advantages that renewable and free of contamination.Its
In, back side silver paste is the important component of solar battery, is prepared by silver powder, glass powder, organic bond and other auxiliary agents
It forms.Back side silver paste is first of slurry of silk-screen process, is printed on crystal silicon solar batteries by silk-screen printing technique
The back side forms silver electrode after high temperature sintering, can be achieved after being welded by welding interconnection between solar battery sheet and
The output of electric current.Back silver paste requires excellent printing performance, electric conductivity, weldability energy, ageing-resistant performance and height
Adhesive force.Silver powder plays the role of conductive and welding as function phase in back silver paste；Glass powder is being sintered as bonding phase
The important function for playing bonding silver powder and silicon substrate in the process is the important materials for generating adhesive force；Organic bond is for dividing
It dissipates micropowders and forms paste mixture, be usually made of solvent, resin and auxiliary agent, volatility is to influence electric slurry storage
Stability, slurry prepare an important factor for sintering process temperature, film quality and electronic component performance of component process
One of.
Existing back side silver paste is primarily present following problems in use: 1, silver paste is applied to silicon chip surface
Afterwards, cell piece is greatly all in crack state, causes in tensile test silicon layer to will appear large area and falls off, service life is short；2,
The backplane pulling force of cell piece is generally in 2.5N, therefore, designs a kind of back of solar cell silver of the anti-crack of high-tensile strength of improvement
The preparation method of slurry is necessary.
Summary of the invention
The first purpose of this invention is the presence of the above problem in view of the prior art, proposes a kind of high-tensile strength of improvement
There is back side pulling force can reach 4N or more, welding performance for the back of solar cell silver paste of anti-crack, the back of solar cell silver paste
By force, the characteristics of long service life.
The first purpose of this invention can be realized by the following technical scheme: the sun electricity of the anti-crack of the high-tensile strength of improvement
Pond back side silver paste, which is characterized in that the mass percent of each component are as follows: flake silver powder 28-46%, nano-silver powder 12-28%, glass
Glass powder 3.2-5.8%, organic bond 25-30%, adhesion promoter 0.3-1.6%, auxiliary agent 0.8-1.5%, additive 3-
5%, the sum of weight percent of each component is 100%.
The sum of weight percent of the flake silver powder and nano-silver powder is 48-66%.
The average grain diameter of the flake silver powder is 4-6 μm, purity 99.93-99.98%.
Use with upper type, when due to flake silver powder partial size less than 4 μm, soldering resistance not enough and be easy with solder congruent melting, lead
Cause adhesive force lower；When partial size is greater than 6 μm, it will affect the printing of slurry, therefore, select partial size for 4-6 μm after comprehensive performance
Flake silver powder.
The average grain diameter of the nano-silver powder is 12-46 μm, purity 99.82-99.99%.
It uses with upper type, nano-silver powder has high dispersive characteristic.
The glass powder is made of the raw material of following mass percent: Bi2O325-55%, CaO 0-12%, ZnO 8-
20%, TiO20.5-0.9%, Al2O39-12%, SiO26-14%, B2O315-25%.
The organic bond is made of the raw material of following mass percent: 12 6-18% of alcohol ester, butyl carbitol vinegar
Acid esters 55-75%, ethyl cellulose 8-12%, butyl 10-20%, polyvinyl butyral 2-6%, sorbitol anhydride
Stearate 2-5%.
The additive is tin oxide and copper oxide, and the mass ratio of tin oxide and copper oxide is 2:3.
Second object of the present invention is the presence of the above problem in view of the prior art, proposes a kind of high-tensile strength of improvement
The preparation method of the back of solar cell silver paste of anti-crack, the preparation method have the characteristics that properties of product are stable.
Second object of the present invention can be realized by the following technical scheme: the sun electricity of the anti-crack of the high-tensile strength of improvement
The preparation method of pond back side silver paste, which comprises the following steps:
A, the preparation of glass powder: by formula rate weigh prepare glass powder raw material, after mixing, in an oven in
120-220 DEG C of drying 1-1.5h, then preheats 0.5-1.0h at 700-850 DEG C, then at 1000-1400 DEG C of melting 1h, spends
It is dried after ion water quenching, then carries out ball milling 5-10h, be sieved after drying, obtain glass powder of the average grain diameter less than 5 μm；
B, the preparation of organic bond: after weighing the raw material for preparing organic bond by formula rate, after mixing,
It heats while stirring at a temperature of 90-160 DEG C in blender, dissolves 1.5-2.5h, obtain organic bond；
C, the preparation of back side silver paste: according to formula rate, by flake silver powder, nano-silver powder, adhesion promoter, auxiliary agent,
Organic bond prepared in prepared glass powder and step b is poured into de-airing mixer in additive, step a, is held
Continuous stirring 1h, forms homogeneous mixture, then is dispersed to be ground into homogeneous slurry in three roll milling apparatus, then through 300 mesh silk screen mistakes
Filter, finally obtains back side silver paste of the fineness less than 10 μm.
Using above method, the manufacturing parameter of each process is optimized well, so as to make each component all be fully utilized,
Properties of product are stablized.
It needs to carry out grinding distribution after the raw material mixing of glass powder in the step a, after color is uniform, then be 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.
It needs that first prepared slurry is uniformly dispersed in the step c, is then ground in the ball mill, grind 3-8
It is secondary, finally roll.
Three roll milling apparatus described in step c include bottom plate, and mixer is fixed on bottom plate, is set gradually in mixer
There are the feed roller, intermediate calender rolls and discharge roller being parallel to each other, being provided on bottom plate can take to what the material in mixer was sampled
Model machine structure；It is additionally provided with the treating column that can be handled the tail gas in mixer on bottom plate, is provided with several electricity in treating column
Heating tube, electric heating tube are connected by route with frequency converter, and the control mechanism that can control frequency converter movement is provided on bottom plate；Place
The import of reason tower is connected with delivery pipe one end, and the delivery pipe other end is connected with mixer, and solenoid valve is provided in delivery pipe,
The gas storage mechanism that the tail gas in delivery pipe can be temporarily stored is provided on bottom plate, gas storage mechanism includes air bag, input pipe
And efferent duct, input pipe one end are connected with the import of air bag, the input pipe other end is connected with delivery pipe, on input pipe successively
It is provided with the first check valve and the first solenoid valve, efferent duct one end is connected with the outlet of air bag, the efferent duct other end and conveying
Pipe is connected, and second one-way valve and second solenoid valve is disposed on efferent duct, and input pipe and efferent duct are located at electricity
Magnet valve two sides；Cooling cooling body can be carried out to treating column by being additionally provided on bottom plate.
The working principle of three roll milling apparatus is as follows: can generate the exhaust gas with silicon powder in mixer production process, have silicon
The exhaust gas of powder is discharged into delivery pipe, opens solenoid valve, and the exhaust gas with silicon powder enters treating column in delivery pipe, passes through electric heating tube
Heating makes the waste gas burning with silicon powder, forms SiO 2 powder；When treating column failure, solenoid valve is closed, opens first
Solenoid valve, the exhaust gas in delivery pipe with silicon powder enter input pipe, are then entered in air bag by the first check valve, disappeared to failure
After removing, the first solenoid valve is closed, opens solenoid valve and second solenoid valve, the exhaust gas in air bag enters in efferent duct, then passes through
Second one-way valve enters in delivery pipe, and exhaust gas is made not handle because for the treatment of column failure and be discharged into the external world, and processing is reliable；
Cooling cooling body can be carried out to treating column by being additionally provided on bottom plate, cooled down using cooling body to treating column, made to locate
Reason tower will not generate failure because temperature is excessively high, and the processing duration is long, and sustainability can be good.
The sampling mechanism includes sampling box, push-rod electric machine, travel switch, cylindrical spring and the detection that top has opening
Plate, push-rod electric machine are fixed on bottom plate, the push rod of push-rod electric machine straight up, the push rod end of push-rod electric machine and sampling box phase
Even, sampling box is located at immediately below intermediate calender rolls, and sampling box can extend into mixer and lean with intermediate calender rolls, detection plate setting
In sampling box, detection plate is connected with cylindrical spring upper end, and cylindrical spring lower end is connected with sampling box bottom, and travel switch is fixed
In sampling box bottom, and detection plate can lean with travel switch.
When needing to be sampled material, the push rod for controlling push-rod electric machine is moved up, and the push rod of push-rod electric machine drives
Sampling box moves up, and sampling box and intermediate calender rolls lean, and makes material collection in sampling box, after material collection is full, detection
Plate and travel switch contact, the push rod of push-rod electric machine moves down when travel switch, so that completing its samples operation, sampling side
Just, quickly.
The control mechanism 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 the above structure, when treating column failure, frequency converter transmits signal to controller, and controller transmits signal to police
Lamp, suggesting effect are good；After treating column Failure elimination, controller controls frequency converter work, and frequency converter makes electric heating tube work again
Make.
The prompting mechanism that can prompt air bag exception is additionally provided on 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 above controller.
Using the above structure, input pipe exception is detected by pressure sensor, abnormal signal is then transmitted to control
Signal is transmitted to display and alarm bell by device, controller simultaneously, and alarm bell issues alarm, and warning function is good.
The solenoid valve, the first solenoid valve and second solenoid valve are connected with above controller.
Using the above structure, it controls solenoid valve, the first solenoid valve, second solenoid valve by controller to act, intelligent journey
Degree is high.
The cooling body includes several blowers, mounting ring, guide rail, sliding block, motor and wirerope, 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 wirerope 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 several blower settings are being installed
On ring, and the air outlet of blower is upward.
Using the above structure, it being worked by motor and drives wirerope movement, 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 in mounting ring, 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 to the motor.
Using the above structure, when the upper stroke switch moved on highest the first spring of touching in mounting ring, up stroke is opened
Closing sending 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 issues signal, rotates forward motor, moves up mounting ring.
Multi-stage treatment units, including exhaust tower are additionally provided on the bottom plate, exhaust tower is fixed on bottom plate, and exhaust tower is logical
It crosses and is connected with the outlet for the treatment of column communicating pipe, be fixed with first grade absorption tower and two-level absorption tower on bottom plate, in first grade absorption tower
It is vertically arranged with demarcation plate one, first grade absorption tower is divided into left cavity and right cavity by demarcation plate one, if offering on demarcation plate one
Dry through-hole, the left cavity lower end of first grade absorption tower are connected with air inlet pipe one, and the right cavity upper end of first grade absorption tower is connected with outlet
Guan Yi, being horizontally disposed in two-level absorption tower has demarcation plate two, and two-level absorption tower is separated into upper plenum and lower cavity by demarcation plate 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, and the other end setting of connecting tube one is absorbed in second level
Tower upper plenum, and connecting tube two is connected between 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 are connected with cavity under two-level absorption tower.
The exhaust gas to have 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, exhaust gas is absorbed, and offer through-hole on demarcation plate one and primarily serve filtering
Effect, meanwhile, exhaust 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 entered in the upper plenum of two-level absorption tower by connecting tube one, thus realize multistage purification,
Two-level absorption tower purified gas by escape pipe two enter exhaust tower discharge, and the water of two-level absorption tower by water inlet pipe into
Enter and is recycled into circulating water pool.
Filter screen is provided on the demarcation plate one.
Filter screen primarily serves the effect being filtered to the exhaust gas entered in first grade absorption tower.
The exhaust tower has inner cavity, and the upper end of exhaust tower is provided with gas outlet, is horizontally fixed in the exhaust tower
Demarcation plate three, and several filter hole are offered on demarcation plate three, the demarcation plate three by exhaust tower inner cavity from top to bottom successively
It is separated into inner cavity and lower inner cavity.
Exhaust tower is separated into upper inner cavity and lower inner cavity by demarcation plate three, and offers filter hole on demarcation plate three, thus right
Exhaust gas carries out refiltering processing.
Several ultraviolet radiators are provided in the exhaust tower lower inner cavity.
Ultraviolet radiator in exhaust tower lower inner cavity can carry out sterilization processing to exhaust gas.
Active carbon is also coated on the inner wall of cavity under the two-level absorption tower.
Active carbon under two-level absorption tower in cavity is that can buy existing product in the market, can be played to exhaust air deodorization
Effect.
Compared with prior art, the invention has the following advantages that
1, this back side silver paste can prevent silicon wafer crack, effectively improve the service life of battery, substantially reduce in production process
Fragment rate, back side pulling force can reach 4N or more；And the thermal expansion coefficient of glass combination and additive combined sintering object and silicon ten
Tap is close, and the degree for immersing silicon layer is very low, therefore damages very little to silicon substrate, cell piece crack degree can be down to most
It is low, while it being able to satisfy the requirement of high adhesion force again, product stability is good.
2, welding performance is strong when this back side silver paste is for silicon wafer, has excellent pulling force characteristic.
3, the manufacturing parameter of each process is optimized in this preparation method, well so as to make each component all by abundant benefit
With properties of product are stablized.
4, in three roll milling apparatus when treating column failure, the exhaust gas in delivery pipe with silicon powder can enter input pipe, pass through
First check valve enters in air bag, and after Failure elimination, the exhaust gas in air bag enters in efferent duct, is entered by second one-way valve
In delivery pipe, exhaust gas is made not handle because for the treatment of column failure and be discharged into the external world, processing is reliable.
5, input pipe exception is detected by pressure sensor, abnormal signal is then transmitted to controller, controller will
Signal is transmitted to display and alarm bell simultaneously, and alarm bell issues alarm, and warning function is good.
Detailed description of the invention
Fig. 1 is the cross-sectional view of three roll milling apparatus.
Fig. 2 is the planar structure schematic diagram that three roll milling apparatus remove part.
Fig. 3 is the schematic cross-sectional view that three roll milling apparatus remove part.
In figure, 1, bottom plate；2, controller；3, display；4, warning lamp；5, electric heating tube；6, treating column；7, second spring；
8, guide rail；9, lower stroke switch；10, sliding block；11, mounting ring；12, blower；13, wirerope；14, upper stroke switch；15, first
Spring；16, motor；17, frequency converter；18, efferent duct；19, solenoid valve；20, delivery pipe；21, input pipe；22, the first solenoid valve；
23, pressure sensor；24, the first check valve；25, air bag；26, second one-way valve；27, second solenoid valve；28, alarm bell；31, circle
Column spring；32, travel switch；33, push-rod electric machine；34, detection plate；35, mixer；36, discharge roller；37, intermediate calender rolls；38, into
Expect roller；39, sampling box；51, exhaust tower；52, first grade absorption tower；53, two-level absorption tower；54, demarcation plate one；55, air inlet pipe one；
56, escape pipe one；57, demarcation plate two；58, air inlet pipe two；59, escape pipe two；60, connecting tube one；61, connecting tube two；62, it follows
Ring pond；63, outlet pipe；64, water inlet pipe；65, demarcation plate three；66, ultraviolet radiator.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
The back of solar cell silver paste of the anti-crack of the high-tensile strength of this improvement, the mass percent of each component are as follows: flake silver powder
28-46%, nano-silver powder 12-28%, glass powder 3.2-5.8%, organic bond 25-30%, adhesion promoter 0.3-
1.6%, auxiliary agent 0.8-1.5%, additive 3-5%, the sum of weight percent of each component are 100%；In the present embodiment, attached
Adhesion promoter is a kind of inorganic compositions that various metals compound is polymerized, and the non-conventional use of adhesive force of industry promotes
Agent, adhesion promoter is using the existing product that can be bought in the market；Auxiliary agent is metal powder, due to itself and scolding tin weldability
It is good, stronger welding performance can be provided, auxiliary agent is using the existing product that can be bought in the market.
The sum of weight percent of flake silver powder and nano-silver powder is 48-66%.
The average grain diameter of flake silver powder is 4-6 μm, purity 99.93-99.98%；Using which, due to flake silver powder
When partial size is less than 4 μm, soldering resistance not enough and be easy with solder congruent melting, cause adhesive force lower；When partial size is greater than 6 μm, it will affect
Therefore, after comprehensive performance the printing of slurry selects partial size for 4-6 μm of flake silver powder.
The average grain diameter of nano-silver powder is 12-46 μm, purity 99.82-99.99%；Using which, nano-silver powder is
With high dispersive characteristic.
Glass powder is made of the raw material of following mass percent: Bi2O325-55%, CaO0-12%, ZnO 8-20%,
TiO20.5-0.9%, Al2O39-12%, SiO26-14%, B2O315-25%.
Organic bond is made of the raw material of following mass percent: 12 6-18% of alcohol ester, butyl carbitol acetate
55-75%, ethyl cellulose 8-12%, butyl 10-20%, polyvinyl butyral 2-6%, sorbitan monostearate
Acid esters 2-5%.
Additive is tin oxide and copper oxide, and the mass ratio of tin oxide and copper oxide is 2:3.
The preparation method of the back of solar cell silver paste of the anti-crack of the high-tensile strength of this improvement, comprising the following steps:
A, the preparation of glass powder: by formula rate weigh prepare glass powder raw material, after mixing, in an oven in
120-220 DEG C of drying 1-1.5h, then preheats 0.5-1.0h at 700-850 DEG C, then at 1000-1400 DEG C of melting 1h, spends
It is dried after ion water quenching, then carries out ball milling 5-10h, be sieved after drying, obtain glass powder of the average grain diameter less than 5 μm；In step a
It needs to carry out grinding distribution after the raw material mixing of glass powder, after color is uniform, then be dried；
B, the preparation of organic bond: after weighing the raw material for preparing organic bond by formula rate, after mixing,
It heats while stirring at a temperature of 90-160 DEG C in blender, dissolves 1.5-2.5h, obtain organic bond；It is organic in step b
After adhesive preparation need to first stir non-solid raw material, then it is gradually added solid material；
C, the preparation of back side silver paste: according to formula rate, by flake silver powder, nano-silver powder, adhesion promoter, auxiliary agent,
Organic bond prepared in prepared glass powder and step b is poured into de-airing mixer in additive, step a, is held
Continuous stirring 1h, forms homogeneous mixture, then is dispersed to be ground into homogeneous slurry in three roll milling apparatus, then through 300 mesh silk screen mistakes
Filter, finally obtains back side silver paste of the fineness less than 10 μm；It needs that first prepared slurry is uniformly dispersed in step c, then in ball
It is ground in grinding machine, grinds 3-8 times, finally roll；Using this method, the manufacturing parameter of each process is optimized well, from
And each component can be made all to be fully utilized, properties of product are stablized.
As shown in Figure 1 and Figure 2, three roll milling apparatus in step c include bottom plate 1, and 1 is fixed with mixer 35 on bottom plate, are mixed
The feed roller 38, intermediate calender rolls 37 and discharge roller 36 being parallel to each other are disposed in hopper 35, being provided on bottom plate can be to mixing
The sampling mechanism that material in case 35 is sampled；The tail gas in mixer 35 can be handled by being additionally provided on bottom plate 1
Treating column 6 is provided with several electric heating tubes 5 in treating column 6, and in the present embodiment, the quantity of electric heating tube 5 is three；Electricity adds
Heat pipe 5 is connected by route with frequency converter 17, and the control mechanism that can control the movement of frequency converter 17 is provided on bottom plate 1；Treating column 6
Import be connected with 20 one end of delivery pipe, the material of delivery pipe 20 is iron, and treating column 6 and delivery pipe 20 are by welding
It is connected, 20 other end of delivery pipe is connected with mixer 35, and solenoid valve 19 is provided in delivery pipe 20, is provided on bottom plate 1
The gas storage mechanism that can temporarily store the tail gas in delivery pipe 20, gas storage mechanism include air bag 25, input pipe 21 and output
Pipe 18,21 one end of input pipe are connected with the import of air bag 25, and the import of 21 one end of input pipe and air bag 25 passes through sealing strip phase
Even, 21 other end of input pipe is connected with delivery pipe 20, and the first check valve 24 and the first electromagnetism are disposed on input pipe 21
Valve 22,18 one end of efferent duct are connected with the outlet of air bag 25, and 18 other end of efferent duct is connected with delivery pipe 20, efferent duct 18
On be disposed with second one-way valve 26 and second solenoid valve 27, and input pipe 21 and efferent duct 18 are located at 19 liang of solenoid valve
Side；Cooling cooling body can be carried out to treating column 6 by being additionally provided on bottom plate 1.
As shown in Figure 1, sampling mechanism includes sampling box 39, push-rod electric machine 33, travel switch 32, the circle that top has opening
Column spring 31 and detection plate 34, push-rod electric machine 33 are fixed on bottom plate, and push-rod electric machine 33 is fixed on by bolted connection
On bottom plate；Straight up, the push rod end of push-rod electric machine 33 is connected the push rod of push-rod electric machine 33 with sampling box 39, sampling box 39 1
Side has introducing port；Sampling box 39 is located at immediately below intermediate calender rolls 37, and sampling box 39 can be extend into mixer 35 and the centre and
Roller 37 leans, and detection plate 34 is arranged in sampling box 39, and detection plate 34 is connected with 31 upper end of cylindrical spring, under cylindrical spring 31
End is connected with 39 bottom of sampling box, and travel switch 32 is fixed on 39 bottom of sampling box, and detection plate 34 can be with 32 phase of travel switch
Against；Using the above structure, when needing to be sampled material, the push rod of control push-rod electric machine 33 is moved up, push rod electricity
The push rod of machine 33 drives sampling box 39 to move up, and sampling box 39 and intermediate calender rolls 37 lean, and make material collection in sampling box 39
Interior, after material collection is full, detection plate 34 and travel switch 32 are contacted, and the push rod of push-rod electric machine 33 is to moving down when travel switch 32
Dynamic, so that completing it samples operation, sampling is easily and fast.
As shown in Fig. 2, control mechanism 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
Using the single-chip microcontroller that can be bought in the market, single-chip microcontroller control solenoid valve, bell, sensor, frequency converter and lamp program be it is existing,
Its program does not need to update；Using the above structure, when 6 failure for the treatment of column, in the present embodiment, failure is of short duration disconnected
Electricity, frequency converter 17 transmit signal to controller 2, and controller 2 transmits signal to warning lamp 4, and suggesting effect is good；When 6 failure for the treatment of column
After elimination, controller 2 controls frequency converter 17 and works, and frequency converter 17 makes electric heating tube 5 rework；Certainly, frequency converter 17 can also
To be connected by route with exhaust fan.
As shown in Fig. 2, being additionally provided with the prompting mechanism that can prompt the exception of air bag 25 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, show
Show that device 3 is fixed on by bolted connection on bottom plate 1, pressure sensor 23, alarm bell 28 and display 3 with controller 2
It is connected, using the above structure, detects that input pipe 21 is abnormal by pressure sensor 23, abnormal signal is then transmitted to control
Signal is transmitted to display 3 and alarm bell 28 by device 2, controller 2 simultaneously, and alarm bell 28 issues alarm, and warning function is good.
As shown in Fig. 2, solenoid valve 19, the first solenoid valve 22 and second solenoid valve 27 are connected with controller 2, more than
Structure controls solenoid valve 19, the first solenoid valve 22, second solenoid valve 27 by controller 2 and acts, and intelligence degree is high.
As shown in Fig. 2, cooling body includes several blowers 12, mounting ring 11, guide rail 8, sliding block 10, motor 16 and wirerope
13, guide rail 8 is fixed on vertically on bottom plate 1, and guide rail 8 is fixed on by welding on bottom plate 1, and sliding block 10 is arranged in guide rail 8
On, motor 16 is fixed on 8 upper end of guide rail, and motor 16 is fixed on 8 upper end of guide rail, 13 one end of wirerope by bolted connection
It is connected with the output shaft of motor 16,13 other end of wirerope is connected with sliding block 10, and mounting ring 11 is fixed on sliding block 10, mounting ring
11 are fixed on by welding on sliding block 10, and treating column 6 is located in mounting ring 11, and several blowers 12 are arranged in mounting ring
On 11, in the present embodiment, the quantity of blower 12 is six, and the air outlet of blower 12 is upward, using the above structure, passes through electricity
The work of machine 16 drives wirerope 13 to act, and wirerope 13 is moved up and down with movable slider 10 along guide rail 8, and then on movable slider 10
Mounting ring 11 moves up and down, and moves up and down the blower 12 in mounting ring 11, so that the hot-air accelerated outside treating column 6 is arranged upwards
Out.
As shown in Fig. 2, 8 upper end of guide rail is fixed with upper stroke switch 14,8 lower end second spring of guide rail 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 the above structure, work as installation
When moving to the upper stroke switch 14 on highest the first spring 15 of touching on ring 11, upper stroke switch 14, which issues signal, keeps 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
Closing 9 sending signals rotates forward motor 16, moves up mounting ring 11.
As shown in figure 3, being 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 communicating pipe with the outlet for the treatment of column 6, and first grade absorption tower 52 is fixed on bottom plate 1 and second level is inhaled
Receive tower 53；Demarcation plate 1 is vertically arranged in first grade absorption tower 52, first grade absorption tower 52 is divided into left cavity by demarcation plate 1
With right cavity, offer through-hole on demarcation plate 1, and be provided with filter screen on demarcation plate 1, filter screen primarily serve into
Enter the effect that the exhaust 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 is connected with escape pipe 1, and being horizontally disposed in two-level absorption tower 53 has demarcation plate two
57, two-level absorption tower 53 is separated into upper plenum and lower cavity by demarcation plate 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
The lower cavity in grade absorption tower 53 is connected with connecting tube 1, and the other end of connecting tube 1 is arranged in 53 upper plenum of two-level absorption tower,
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. 3, in rack, 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 64,64 other end of water inlet pipe with
The lower cavity of two-level absorption tower 53 is connected；Exhaust tower 51 has inner cavity, and the upper end of exhaust tower 51 is provided with gas outlet, exhaust tower 51
It is inside horizontally fixed with demarcation plate 3 65, and offers several filter hole on demarcation plate 3 65, demarcation plate 3 65 will be in exhaust tower 51
Chamber is successively separated into inner cavity and lower inner cavity from top to bottom；Exhaust tower 51 is separated into upper inner cavity and lower inner cavity by demarcation plate 3 65,
And filter hole is offered on demarcation plate 3 65, to carry out refiltering processing to exhaust gas；If being provided in 51 lower inner cavity of exhaust tower
Dry ultraviolet radiator 66, the ultraviolet radiator 66 in 51 lower inner cavity of exhaust tower can carry out sterilization processing to exhaust gas.
Shown in Fig. 3, it is also coated with active carbon on the inner wall of the lower cavity of two-level absorption tower 53, under two-level absorption tower 53 in cavity
Active carbon is that can buy existing product in the market, can be played the role of to exhaust air deodorization.
The working principle of three roll milling apparatus is as follows: can generate the exhaust gas with silicon powder in 35 production process of mixer, have
The exhaust gas of silicon powder is discharged into delivery pipe 20, opens solenoid valve 19 by controller 2, the exhaust gas with silicon powder enters in delivery pipe 20
Treating column 6 controls frequency converter 17 by controller 2 and works, and frequency converter 17 makes electric heating tube 5 work, and makes the exhaust gas with silicon powder
Burning forms SiO 2 powder；When 6 failure for the treatment of column, solenoid valve 19 is closed by controller 2, then passes through controller 2
Open the first solenoid valve 22, the exhaust gas in delivery pipe 20 with silicon powder enters input pipe 21, then by the first check valve 24 into
Enter in air bag 25, after Failure elimination, the first solenoid valve 22 is closed by controller 2, solenoid valve is then opened by controller 2
19 and second solenoid valve 27, the exhaust gas in air bag 25 enters in efferent duct 18, then enters delivery pipe by second one-way valve 26
In 20；The exhaust gas to have burnt is entered in first grade absorption tower 52 by air inlet pipe 1, and the water in circulating water pool 62 passes through water 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 plate 1,
Meanwhile exhaust gas in first grade absorption tower 52 and water are flowed out by escape pipe 1, and by connecting tube 2 61 and air inlet pipe 2 58 into
Enter into the upper plenum of two-level absorption tower 53, then entered by connecting tube 1 in the upper plenum of two-level absorption tower 53, thus real
Existing multistage purification, 53 purified gas of two-level absorption tower enters the discharge of exhaust tower 51 by escape pipe 2 59, and second level is inhaled
The water for receiving tower 53 is entered in circulating water pool 62 by water inlet pipe 64 to be recycled.
The embodiment one of preparation method:
A, the preparation of glass powder: Bi is weighed2O341.9%, CaO 8.2%, ZnO 16.8%, TiO20.7%,
Al2O39.3%, SiO26.6%, B2O316.5%, after mixing, in an oven in 165 DEG C of drying 1h, then at 750 DEG C
Preheating 0.8h is dried after being quenched with deionized water then at 1200 DEG C of melting 1h, then carries out ball milling 8h, is sieved, is averaged after drying
Glass powder of the partial size less than 5 μm；
B, alcohol ester ten two 8.5%, butyl carbitol acetate 65.8%, ethyl cellulose the preparation of organic bond: are weighed
Element 8.3%, butyl 12.3%, polyvinyl butyral 2.5%, sorbitan tristearate 2.6% are uniformly mixed
Afterwards, it heats while stirring at a temperature of 120 DEG C in blender, dissolves 2h, obtain organic bond；
C, the preparation of back side silver paste: according to silver powder 62.1%, glass powder 3.5%, organic bond 28%, adhesive force promotion
The ratio of agent 1.2%, auxiliary agent 1.2% and additive 4% is poured into de-airing mixer, persistently stirs 1h, forms uniformly mixing
Then object is dispersed to be ground into homogeneous slurry in three roll milling apparatus, then through 300 mesh silk screen filters, finally obtaining fineness fineness is 8
μm, viscosity is the back side silver paste of 28PaS；Wherein, silver powder is flake silver powder and nano-silver powder, and the average grain diameter of flake silver powder is
5.4 μm, the average grain diameter of nano-silver powder is 14.7 μm.
By back side silver paste with 280 mesh screen paintings at the polysilicon solar battery slice back side of 156mm × 156mm, according to
Crystal silicon solar cell sheet production process carries out photoelectric conversion efficiency test after cell piece is made, and transfer efficiency average value reaches
18.1%；Cell piece is welded at 360 DEG C with leaded welding, then carries out 180 ° of peel tests, test result is shown initially
Adhesive force is all larger than 5.3N, and the aging adhesive force of 3h is above 4.1N, and the silicon substrate surface after initial tensile force at 180 DEG C
The area that falls off of silicon is less than 1%；Test result such as table 1 and 2.
1 back silver paste electric performance test result of table
2 back silver paste adhesive force of table and silicon layer fall off area test result
The embodiment two of preparation method:
A, the preparation of glass powder: Bi is weighed2O331.5%, CaO 11%, ZnO 18.8%, TiO20.6%,
Al2O311.8%, SiO29.8%, B2O316.5%, after mixing, in an oven in 165 DEG C of drying 1h, then at 750 DEG C
Preheating 0.8h is dried after being quenched with deionized water then at 1200 DEG C of melting 1h, then carries out ball milling 8h, is sieved, is averaged after drying
Glass powder of the partial size less than 5 μm；
B, alcohol ester ten two 12.5%, butyl carbitol acetate 55.6%, ethyl cellulose the preparation of organic bond: are weighed
Element 8.8%, butyl 16.3%, polyvinyl butyral 2.6%, sorbitan tristearate 4.2% are uniformly mixed
Afterwards, it heats while stirring at a temperature of 120 DEG C in blender, dissolves 2h, obtain organic bond；
C, the preparation of back side silver paste: according to silver powder 58.8%, glass powder 5.6%, organic bond 29.7%, attachment is made every effort to promote
Into agent 1.5%, the ratio of auxiliary agent 1.4% and additive 3% is poured into de-airing mixer, persistently stirs 1h, is formed uniformly mixed
Object is closed, then is dispersed to be ground into homogeneous slurry in three roll milling apparatus, then through 300 mesh silk screen filters, finally obtain fineness fineness
It is 8 μm, viscosity is the back side silver paste of 27PaS；Wherein, silver powder is flake silver powder and nano-silver powder, the average grain of flake silver powder
Diameter is 5.4 μm, and the average grain diameter of nano-silver powder is 14.7 μm.
By back side silver paste with 280 mesh screen paintings at the polysilicon solar battery slice back side of 156mm × 156mm, according to
Crystal silicon solar cell sheet production process carries out photoelectric conversion efficiency test after cell piece is made, and transfer efficiency average value reaches
18.2%；Cell piece is welded at 360 DEG C with leaded welding, then carries out 180 ° of peel tests, test result is shown initially
Adhesive force is all larger than 5.6N, and the aging adhesive force of 3h is above 4.4N, and the silicon substrate surface after initial tensile force at 180 DEG C
The area that falls off of silicon is less than 1%；Test result such as table 3 and 4.
3 back silver paste electric performance test result of table
4 back silver paste adhesive force of table and silicon layer fall off area test result
The embodiment three of preparation method:
A, the preparation of glass powder: Bi is weighed2O354.5%, CaO 3.3%, ZnO 10.3%, TiO20.8%,
Al2O39.6%, SiO26.5%, B2O315%, it is after mixing, then pre- at 750 DEG C in an oven in 165 DEG C of drying 1h
Hot 0.8h is dried after being quenched with deionized water then at 1200 DEG C of melting 1h, then carries out ball milling 8h, is sieved after drying, and average grain is obtained
Glass powder of the diameter less than 5 μm；
B, alcohol ester ten two 6.2%, butyl carbitol acetate 71.3%, ethyl cellulose the preparation of organic bond: are weighed
Element 8.4%, butyl 10.1%, polyvinyl butyral 2%, sorbitan tristearate 2%, after mixing,
It heats while stirring at a temperature of 120 DEG C in blender, dissolves 2h, obtain organic bond；
C, the preparation of back side silver paste: according to silver powder 64.5%, glass powder 3.2%, organic bond 27.6%, attachment is made every effort to promote
Into agent 0.8%, the ratio of auxiliary agent 0.9% and additive 3% is poured into de-airing mixer, persistently stirs 1h, is formed uniformly mixed
Object is closed, then is dispersed to be ground into homogeneous slurry in three roll milling apparatus, then through 300 mesh silk screen filters, finally obtain fineness fineness
It is 8 μm, viscosity is the back side silver paste of 32PaS；Wherein, silver powder is flake silver powder and nano-silver powder, the average grain of flake silver powder
Diameter is 5.4 μm, and the average grain diameter of nano-silver powder is 14.7 μm.
By back side silver paste with 280 mesh screen paintings at the polysilicon solar battery slice back side of 156mm × 156mm, according to
Crystal silicon solar cell sheet production process carries out photoelectric conversion efficiency test after cell piece is made, and transfer efficiency average value reaches
18.3%；Cell piece is welded at 360 DEG C with leaded welding, then carries out 180 ° of peel tests, test result is shown initially
Adhesive force is all larger than 5.7N, and the aging adhesive force of 3h is above 4.3N, and the silicon substrate surface after initial tensile force at 180 DEG C
The area that falls off of silicon is less than 1%；Test result such as table 5 and 6.
5 back silver paste electric performance test result of table
6 back silver paste adhesive force of table and silicon layer fall off area test result
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (4)
1. three roll milling apparatus of improvement, including bottom plate, which is characterized in that be fixed with mixer on the bottom plate, in mixer according to
Secondary to be provided with the feed roller, intermediate calender rolls and discharge roller being parallel to each other, the material in mixer can be taken by being provided on bottom plate
The sampling mechanism of sample；It is additionally provided with the treating column that can be handled the tail gas in mixer on bottom plate, is provided in treating column
Three electric heating tubes, electric heating tube are connected by route with frequency converter, and the control that can control frequency converter movement is provided on bottom plate
Mechanism；The import for the treatment of column is connected with delivery pipe one end, and the material of delivery pipe is iron, and the delivery pipe other end is connected with mixer
It is logical, it is provided with solenoid valve in delivery pipe, the gas storage mechanism that the tail gas in delivery pipe can be temporarily stored is provided on bottom plate,
Gas storage mechanism includes air bag, input pipe and efferent duct, and input pipe one end is connected with the import of air bag, the input pipe other end and defeated
It send pipe to be connected, the first check valve and the first solenoid valve, the outlet phase of efferent duct one end and air bag is disposed on input pipe
Connection, the efferent duct other end are connected with delivery pipe, second one-way valve and second solenoid valve are disposed on efferent duct, and defeated
Enter pipe and efferent duct is located at solenoid valve two sides；Cooling cooling body can be carried out to treating column by being additionally provided on bottom plate；It is cold
But mechanism includes that six blowers, mounting ring, guide rail, sliding block, motor and wirerope, guide rail are fixed on bottom plate by welding
On, sliding block is arranged on guide rail, and motor is fixed on guide rail upper end by bolted connection, wirerope one end and motor it is defeated
Shaft is connected, and the wirerope other end is connected with sliding block, and mounting ring is fixed on sliding block by welding, and treating column is located at
In mounting ring, six blowers are arranged in mounting ring, and the air outlet of blower is upward.
2. three roll milling apparatus of improvement according to claim 1, which is characterized in that be additionally provided with multistage place on the bottom plate
Device is managed, including exhaust tower, exhaust tower are fixed on bottom plate, exhaust tower is connected by communicating pipe with the outlet for the treatment of column, bottom
It is fixed with first grade absorption tower and two-level absorption tower on plate, is vertically arranged with demarcation plate one in first grade absorption tower, demarcation plate one is by one
Grade absorption tower is divided into left cavity and right cavity, and several through-holes are offered on demarcation plate one, and the left cavity lower end of first grade absorption tower connects
It is connected to air inlet pipe one, the right cavity upper end of first grade absorption tower is connected with escape pipe one, and being horizontally disposed in two-level absorption tower has separation
Two-level absorption tower is separated into upper plenum and lower cavity by plate two, demarcation plate two, and the upper plenum of two-level absorption tower is connected with air inlet pipe
Two, the lower cavity of two-level absorption tower is connected with escape pipe two, and escape pipe two is connected with exhaust tower, cavity under two-level absorption tower
Be connected with connecting tube one, the other end setting of connecting tube one in two-level absorption tower upper plenum, and escape pipe one and air inlet pipe two it
Between be connected with connecting tube two；A circulating water pool is further fixed on bottom plate, circulating water pool is connected with outlet pipe, the other end of outlet pipe
It is connected with the right cavity of first grade absorption tower, circulating water pool is connected with water inlet pipe, cavity under the water inlet pipe other end and two-level absorption tower
It is connected；Active carbon is also coated on the inner wall of cavity under two-level absorption tower.
3. three roll milling apparatus of improvement according to claim 2, which is characterized in that the exhaust tower has inner cavity, exhaust
The upper end of tower is provided with gas outlet, demarcation plate three is horizontally fixed in exhaust tower, and several filter hole are offered on demarcation plate three,
Exhaust tower inner cavity is successively separated into upper inner cavity and lower inner cavity by demarcation plate three from top to bottom；It is provided in exhaust tower lower inner cavity several
Ultraviolet radiator.
4. three roll milling apparatus of improvement according to claim 2, which is characterized in that the sampling mechanism includes that top has
Sampling box, push-rod electric machine, travel switch, cylindrical spring and the detection plate of opening, push-rod electric machine are solid by bolted connection
It is scheduled on bottom plate, straight up, the push rod end of push-rod electric machine is connected the push rod of push-rod electric machine with sampling box, sampling box side tool
There is introducing port；Sampling box is located at immediately below intermediate calender rolls, and sampling box can extend into mixer and lean with intermediate calender rolls, detect
Plate is arranged in sampling box, and detection plate is connected with cylindrical spring upper end, and cylindrical spring lower end is connected with sampling box bottom, and stroke is opened
Pass is fixed on sampling box bottom, and detection plate can lean with travel switch.
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| CN201711104607.4A CN107731345B (en) | 2016-07-05 | 2016-07-05 | The preparation method of the back of solar cell silver paste of the anti-crack of the high-tensile strength of improvement |
| CN201610539247.XA CN106229031B (en) | 2016-07-05 | 2016-07-05 | A kind of high-tensile strength prevents hidden back of solar cell silver paste split and preparation method thereof |
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| CN109671639B (en) * | 2018-12-25 | 2020-10-23 | 苏州腾晖光伏技术有限公司 | Method for testing reliability of battery metal electrode and welding strip after welding |
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| 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 |
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| CN107731345A (en) | 2018-02-23 |
| CN106229031A (en) | 2016-12-14 |
| CN106229031B (en) | 2018-02-02 |
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