CN108198874A - A kind of processing method of MWT battery silk-screen printing defective products - Google Patents
A kind of processing method of MWT battery silk-screen printing defective products Download PDFInfo
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- CN108198874A CN108198874A CN201711453726.0A CN201711453726A CN108198874A CN 108198874 A CN108198874 A CN 108198874A CN 201711453726 A CN201711453726 A CN 201711453726A CN 108198874 A CN108198874 A CN 108198874A
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- defective products
- screen printing
- printing defective
- mwt battery
- processing method
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- 230000002950 deficient Effects 0.000 title claims abstract description 67
- 238000007650 screen-printing Methods 0.000 title claims abstract description 28
- 238000003672 processing method Methods 0.000 title claims abstract description 20
- 238000007639 printing Methods 0.000 claims abstract description 28
- 238000004140 cleaning Methods 0.000 claims abstract description 27
- 239000002002 slurry Substances 0.000 claims abstract description 24
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004411 aluminium Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 24
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 22
- RBNWAMSGVWEHFP-UHFFFAOYSA-N trans-p-Menthane-1,8-diol Chemical compound CC(C)(O)C1CCC(C)(O)CC1 RBNWAMSGVWEHFP-UHFFFAOYSA-N 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 14
- 239000008139 complexing agent Substances 0.000 claims description 10
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical group OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 8
- 229960001484 edetic acid Drugs 0.000 claims description 8
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 4
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- WXHLLJAMBQLULT-UHFFFAOYSA-N 2-[[6-[4-(2-hydroxyethyl)piperazin-1-yl]-2-methylpyrimidin-4-yl]amino]-n-(2-methyl-6-sulfanylphenyl)-1,3-thiazole-5-carboxamide;hydrate Chemical compound O.C=1C(N2CCN(CCO)CC2)=NC(C)=NC=1NC(S1)=NC=C1C(=O)NC1=C(C)C=CC=C1S WXHLLJAMBQLULT-UHFFFAOYSA-N 0.000 claims description 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 239000003518 caustics Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 239000011775 sodium fluoride Substances 0.000 claims description 2
- 235000013024 sodium fluoride Nutrition 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- 125000000217 alkyl group Chemical group 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 229910052700 potassium Inorganic materials 0.000 claims 1
- 239000011591 potassium Substances 0.000 claims 1
- 239000001509 sodium citrate Substances 0.000 claims 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims 1
- 238000012797 qualification Methods 0.000 abstract description 12
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052709 silver Inorganic materials 0.000 abstract description 11
- 239000004332 silver Substances 0.000 abstract description 11
- 230000005611 electricity Effects 0.000 abstract description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical group [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 15
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 9
- 238000007598 dipping method Methods 0.000 description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- 239000000428 dust Substances 0.000 description 6
- 239000004744 fabric Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000001458 anti-acid effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000012188 paraffin wax Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000004506 ultrasonic cleaning Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 244000248349 Citrus limon Species 0.000 description 1
- 235000005979 Citrus limon Nutrition 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum ions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
- H01L31/02245—Electrode arrangements specially adapted for back-contact solar cells for metallisation wrap-through [MWT] type solar cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/14—Multicolour printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/22—Metallic printing; Printing with powdered inks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
-
- 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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/186—Particular post-treatment for the devices, e.g. annealing, impurity gettering, short-circuit elimination, recrystallisation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a kind of processing method of MWT battery silk-screen printing defective products, including：MWT battery silk-screen printing defective products is divided into front electrode printing defective products and Al-BSF printing defective products；The slurry in the front slurry and electrode hole of front electrode printing defective products is removed, together with Al-BSF printing defective products, cleans the back side of cell piece after one layer of mask of preparation again in electrode hole.The present invention is using silk-screen printing by the way of, one layer of mask of preparation in hole, prevents aluminium paste and front side silver paste causes in hole in process of rework and leaks electricity.Meanwhile by optimizing cleaning and formula, eliminate the aluminium paste pollution that poles region is born at the MWT battery back side.The method substantially increases the qualification rate of doing over again of MWT battery printing defective products.
Description
Technical field
The present invention relates to silicon solar cell technology field more particularly to a kind of MWT battery silk-screen printing defective products
Processing method.
Background technology
Crystal silicon solar technology includes heterojunction solar battery (HIT), back electrode contact silicon solar cell
(IBC), emitter circulating break-through silicon solar cell (EWT), buried contaCt solar Cells tilt the evaporated metal contact silicon sun
Energy battery (OECO) and metal piercing winding silicon solar cell (MWT) etc., wherein MWT battery is because of its efficient, shading-area
Small and better appearance characteristics receive more and more attention.MWT silicon solar cells are to be received front by laser drill
The energy of collection passes through battery transfer to achieve the purpose that improve transfer efficiency to reduce shading-area to cell backside.
At present, prepared by the follow conventional lines mode of silk-screen printing of the positive and negative anodes of MWT battery, Al-BSF and front electrode.
In normal silk-screen printing production process, it often will appear some silk-screen printing defective products caused by printing exception, from
And influence the qualification rate and transfer efficiency of product.For the printing defective products of conventional batteries piece, wiped by alcohol or terpinol
When doing over again, often by aluminium paste wiping pollute cell piece front or edge and cause electric leakage and it is inefficient, so only by
Wiping passes down after doing over again can seriously affect qualification rate of doing over again.At present, it is generally printed not using the method for pickling+washing in the industry
The reworked processing of non-defective unit, the aluminium paste that can not be wiped out by the thorough removing cell piece surface of the chemical reaction of hydrochloric acid and aluminum metal,
By the method, treated does over again qualification rate up to more than 95%.Wherein, patent CN201110111345.0 discloses one kind
It is done over again by the way of hydrochloric acid, isopropanol, depth cleaning solution；Patent CN200710301464.6 discloses a kind of using wine
Smart ultrasonic cleaning, salt acid soak, washing, alcohol ultrasound mode do over again.Patent CN201510872005.8 discloses one
Kind is done over again in a manner that alcohol ultrasonic cleaning, hydrochloric acid and nitric acid are cleaned by ultrasonic, dry.
Since the special construction of the perforation of MWT battery piece and positive and negative anodes overleaf determines its processing procedure and defective work processing
Particularity.For the printing defective products of MWT battery, when being done over again by alcohol or terpinol wiping, not only aluminium paste pollutes just
Face and edge can influence qualification rate of doing over again, and aluminium paste pollutes the negative poles region at the MWT battery back side and hole interior zone also can
Cause electric leakage and transfer efficiency.Using conventional batteries do over again method processing MWT printing defective products when, do over again low qualified and
Less than 50%.It needs to formulate special do over again scheme and flow for MWT battery doing over again for defective products of printing as a result, at present also
Have no correlation report and research.
Invention content
Goal of the invention：To solve the problems of the prior art, the present invention provides a kind of MWT battery silk-screen printing defective products
Processing method.
Technical solution：The processing method of MWT battery silk-screen printing defective products of the present invention, including：Remove cell piece
Slurry in electrode hole cleans the back side of cell piece again in electrode hole after one layer of mask of preparation.
The step that has of the processing method of the MWT battery silk-screen printing defective products includes：
(1) MWT battery silk-screen printing defective products is divided into front electrode printing defective products and Al-BSF prints defective products；
(2) slurry in the front slurry and electrode hole of removal front electrode printing defective products, with Al-BSF printing not
Non-defective unit together, cleans the back side of cell piece again in electrode hole after one layer of mask of preparation.
Slurry in front slurry and electrode hole is removed using alcohol or terpinol.During concrete operations, leaching can be used
The non-dust cloth or dust-free paper of stain alcohol or terpinol wipe out front slurry (silver paste), and the slurry in hole is rinsed out with spray gun.
The mask is made of paraffin or antiacid high molecular material, 1-20 μm of thickness, is further 1-5 μm of thickness.
The cleaning method at the cell piece back side includes：
(a) aluminium paste at the cell piece back side is washed off with alcohol or terpinol, is then rinsed；
(b) cell piece handled through step (a) is cleaned using the mixed liquor of acid or acid and complexing agent, cleaning knot
It is rinsed after beam；
(c) cell piece handled through step (b) with lye is cleaned, rinses, dries after cleaning.
During step (a) concrete operations, non-dust cloth or dust-free paper that dipping alcohol or terpinol can be used wipe out back aluminium
Slurry.
In step (b), the acid is hydrochloric acid, and the complexing agent is ethylenediamine tetra-acetic acid, sulfosalicylic acid, lemon
One or more of acid, sodium fluoride, ammonium fluoride, Sodium Dimercapto Sulfonate and thiocarbamide etc. mixture.The purpose done over again is goes
Except the cathode point of aluminium powder pollution cell piece front and back, the effect of complexing agent be by the way that aluminium ion is complexed, improve removal aluminium from
Son effect, different complexing agents are variant to aluminum ions Complex effect, but do over again caused by this difference qualification rate 1% with
It is interior.One kind preferably selects, and complexing agent is ethylenediamine tetra-acetic acid or/and citric acid.
In mixed liquor, sour a concentration of 4~12%, a concentration of the 0.1~1% of complexing agent, the time of mixed liquor cleaning is 1
~6h.
Further, in mixed liquor, a concentration of 6~12% (or 8~12%) of hydrochloric acid, ethylenediamine tetra-acetic acid it is a concentration of
0.5~1%, the time of cleaning is 1~4h.
Further, in mixed liquor, a concentration of the 6~8% of hydrochloric acid, a concentration of the 0.5~0.8% of ethylenediamine tetra-acetic acid,
A concentration of the 0.2~0.4% of citric acid, the time of cleaning is 2~3h.
In step (c), lye is potassium hydroxide aqueous solution, a concentration of 17~20%, the time of caustic dip is 5-
20min.Lye can neutralize the acid residual of acid pickling step.
In step (a)-(c), cleaning is using ultrasonic power；Ultrasonic rinsing is carried out using water or alcohol during rinsing.Rinsing
Purpose is the reagents residual such as acid, alkali of step before removing, and the time of rinsing is 0.5~1h.
In above-mentioned cleaning, rinse cycle, ultrasonic power 5-15w/L.
Compared with prior art, beneficial effects of the present invention are：
By the way of silk-screen printing, one layer of mask is prepared in hole, prevents aluminium paste and front side silver paste in process of rework
In cause in hole and leak electricity.Meanwhile by optimizing cleaning and formula, eliminate the aluminium that poles region is born at the MWT battery back side
Slurry pollution.The method substantially increases the qualification rate of doing over again of MWT battery printing defective products.
Because of MWT special constructions, the rework preocess of conventional batteries piece can not be met the requirements, using common process, conjunction of doing over again
Lattice rate is less than 60%, and electric leakage ratio is more than 20%, and electrical leakage is more than 0.6A；Using present invention process, qualification rate of doing over again is more than
95%, for electric leakage ratio less than 0.5%, electrical leakage is less than 0.3A.
Description of the drawings
Fig. 1 prints bad flow of doing over again for MWT.
Specific embodiment
With reference to specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate the present invention
Rather than limit the scope of the invention, after the present invention has been read, those skilled in the art are to the various equivalences of the present invention
The modification of form falls within the application range as defined in the appended claims.
A concentration of mass fraction of ingredient involved in following embodiments.Unless otherwise specified, when the present invention prepares solution
Used solvent is water.
Embodiment 1
The processing method of MWT battery silk-screen printing defective products is as follows：
(1) defective products is printed for the front electrode of coated surface, is first wiped out with the non-dust cloth of dipping terpinol positive
Then silver paste rinses out the silver paste in hole with terpinol and spray gun.
(2) defective products after (1) step and Al-BSF printing defective products are unified plated film and placed up, then pass through silk
The mode of printing, (paraffin or antiacid high molecular material, thickness can be used in mask slurry to one layer of mask slurry of preparation in hole
1-20 μm), drying；
(3) defective products after printing mask is taken out, the aluminium paste at the back side is wiped out with the dust-free paper of dipping terpinol.
(4) gaily decorated basket will be inserted into through the defective products after (3) step, be impregnated using alcohol, (ultrasonic power is big according to groove body for ultrasonic wave
Depending on small, conventional 5-15w/L) it cleans 0.5-1 hours；
(5) will through the defective products after (4) step, using the hydrochloric acid and 0.5% concentration of 8% concentration ethylenediamine tetra-acetic acid it is mixed
Close solution immersion, ultrasonic wave (ultrasonic power 5W/L) cleans 4 hours；
(6) alcohol will be used to impregnate through bad after (5) step, ultrasonic wave (ultrasonic power 5W/L) cleaning 0.5-1 it is small
When；
(7) it will be impregnated through bad after (6) step using the potassium hydroxide of 17-20% concentration, ultrasonic wave (ultrasonic power
For 5W/L) cleaning 5-20min；
(8) alcohol will be used to impregnate through bad after (7) step, ultrasonic wave (ultrasonic power 5W/L) cleaning 0.5-1 it is small
When；
(9) it will be dried through bad after (8) step using dryer.
After the embodiment method is done over again, qualification rate of doing over again is 96.6%, and electric leakage ratio is 0.42%, and electrical leakage is less than
0.3A。
Embodiment 2
The processing method of MWT battery silk-screen printing defective products is as follows：
(1) defective products is printed for the front electrode of coated surface, is first wiped out with the non-dust cloth of dipping terpinol positive
Then silver paste rinses out the silver paste in hole with terpinol and spray gun.
(2) defective products after (1) step and Al-BSF printing defective products are unified plated film and placed up, then pass through silk
The mode of printing, (paraffin or antiacid high score can be used in mask slurry to the mask slurry of 1-5 μm of a layer thickness of preparation in hole
Sub- material) drying；
(3) defective products after printing mask is taken out, the aluminium paste at the back side is wiped out with the dust-free paper of dipping terpinol.
(4) gaily decorated basket will be inserted into through the defective products after (3) step, be impregnated using alcohol, (ultrasonic power is big according to groove body for ultrasonic wave
Depending on small, conventional 5-15w/L) it cleans 0.5-1 hours；
(5) it will be impregnated using the hydrochloric acid solution of 4% concentration through the defective products after (4) step, ultrasonic cleaning 6 hours；
(6) alcohol will be used to impregnate through bad after (5) step, ultrasonic wave (ultrasonic power 5W/L) cleaning 0.5-1 it is small
When；
(7) it will be impregnated through bad after (6) step using the potassium hydroxide of 17-20% concentration, ultrasonic wave (ultrasonic power
For 5W/L) cleaning 5-20min；
(8) it will be impregnated using alcohol through bad after (7) step, ultrasonic cleaning 0.5-1 hours；
(9) it will be dried through bad after (8) step using dryer.
After the embodiment method is done over again, qualification rate of doing over again is 95.1%, and electric leakage ratio is 0.49%, and electrical leakage is less than
0.3A。
Embodiment 3
The processing method of MWT battery silk-screen printing defective products is as follows：
(1) defective products is printed for the front electrode of coated surface, is first wiped out with the non-dust cloth of dipping terpinol positive
Then silver paste rinses out the silver paste in hole with terpinol and spray gun.
(2) defective products after (1) step and Al-BSF printing defective products are unified plated film and placed up, then pass through silk
The mode of printing, (paraffin or antiacid high score can be used in mask slurry to the mask slurry of 1-5 μm of a layer thickness of preparation in hole
Sub- material), drying；
(3) defective products after printing mask is taken out, the aluminium paste at the back side is wiped out with the dust-free paper of dipping terpinol.
(4) gaily decorated basket will be inserted into through the defective products after (3) step, be impregnated using alcohol, (ultrasonic power is big according to groove body for ultrasonic wave
Depending on small, conventional 5-15w/L) it cleans 0.5-1 hours；
(5) will through the defective products after (4) step, using the hydrochloric acid and 1% concentration of 12% concentration ethylenediamine tetra-acetic acid it is mixed
Close solution immersion, ultrasonic wave (ultrasonic power 5W/L) cleans 1 hour；
(6) alcohol will be used to impregnate through bad after (5) step, ultrasonic wave (ultrasonic power 5W/L) cleaning 0.5-1 it is small
When；
(7) it will be impregnated through bad after (6) step using the potassium hydroxide of 17-20% concentration, ultrasonic wave (ultrasonic power
For 5W/L) cleaning 5-20min；
(8) alcohol will be used to impregnate through bad after (7) step, ultrasonic wave (ultrasonic power 5W/L) cleaning 0.5-1 it is small
When；
(9) it will be dried through bad after (8) step using dryer.
After the embodiment method is done over again, qualification rate of doing over again is 96.2%, and electric leakage ratio is 0.44%, and electrical leakage is less than
0.3A。
Embodiment 4
The processing method of MWT battery silk-screen printing defective products is as follows：
(1) defective products is printed for the front electrode of coated surface, is first wiped out with the non-dust cloth of dipping terpinol positive
Then silver paste rinses out the silver paste in hole with terpinol and spray gun.
(2) defective products after (1) step and Al-BSF printing defective products are unified plated film and placed up, then pass through silk
The mode of printing, (paraffin or antiacid high score can be used in mask slurry to the mask slurry of 1-5 μm of a layer thickness of preparation in hole
Sub- material), drying；
(3) defective products after printing mask is taken out, the aluminium paste at the back side is wiped out with the dust-free paper of dipping terpinol.
(4) gaily decorated basket will be inserted into through the defective products after (3) step, be impregnated using alcohol, (ultrasonic power is big according to groove body for ultrasonic wave
Depending on small, conventional 5-15w/L) it cleans 0.5-1 hours；
(5) will through the defective products after (4) step, using the hydrochloric acid of 6% concentration, 0.5% concentration ethylenediamine tetra-acetic acid and
The mixed solution of the citric acid of 0.2% concentration impregnates, ultrasonic wave (ultrasonic power 5W/L) cleans 1 hour；
(6) alcohol will be used to impregnate through bad after (5) step, ultrasonic wave (ultrasonic power 5W/L) cleaning 0.5-1 it is small
When；
(7) it will be impregnated through bad after (6) step using the potassium hydroxide of 17-20% concentration, ultrasonic wave (ultrasonic power
For 5W/L) cleaning 5-20min；
(8) alcohol will be used to impregnate through bad after (7) step, ultrasonic wave (ultrasonic power 5W/L) cleaning 0.5-1 it is small
When；
(9) it will be dried through bad after (8) step using dryer.
After the embodiment method is done over again, qualification rate of doing over again is 97.2%, and electric leakage ratio is 0.38%, and electrical leakage is less than
0.3A。
Claims (9)
1. a kind of processing method of MWT battery silk-screen printing defective products, which is characterized in that including：Remove cell piece electrode hole
Interior slurry cleans the back side of cell piece again in electrode hole after one layer of mask of preparation.
2. the processing method of MWT battery silk-screen printing defective products according to claim 1, which is characterized in that including：
(1) MWT battery silk-screen printing defective products is divided into front electrode printing defective products and Al-BSF prints defective products；
(2) slurry in the front slurry and electrode hole of removal front electrode printing defective products, prints defective products with Al-BSF
Together, the back side of cell piece is cleaned after one layer of mask of preparation again in electrode hole.
3. the processing method of MWT battery silk-screen printing defective products according to claim 2, which is characterized in that front slurry
And the slurry in electrode hole is removed using alcohol or terpinol.
4. the processing method of MWT battery silk-screen printing defective products according to claim 1 or 2, which is characterized in that cell piece
The cleaning method at the back side includes：
(a) aluminium paste at the cell piece back side is washed off with alcohol or terpinol, is then rinsed；
(b) cell piece handled through step (a) using the mixed liquor of acid or acid and complexing agent is cleaned, is floated after cleaning
It washes；
(c) cell piece handled through step (b) with lye is cleaned, rinses, dries after cleaning.
5. the processing method of MWT battery silk-screen printing defective products according to claim 4, which is characterized in that the acid
For hydrochloric acid, the complexing agent is ethylenediamine tetra-acetic acid, sulfosalicylic acid, sodium citrate, sodium fluoride, ammonium fluoride, dimercapto third
One or more of alkyl sulfonic acid sodium and thiocarbamide etc. mixture.
6. the processing method of MWT battery silk-screen printing defective products according to claim 4, which is characterized in that in mixed liquor,
A concentration of 4~12%, a concentration of the 0.1~1% of complexing agent of acid.
7. the processing method of MWT battery silk-screen printing defective products according to claim 4, which is characterized in that cleaning uses
Ultrasonic power；Ultrasonic rinsing is carried out using water or alcohol during rinsing.
8. the processing method of MWT battery silk-screen printing defective products according to claim 4, which is characterized in that lye is hydrogen
Oxidation aqueous solutions of potassium, a concentration of 17~20%.
9. the processing method of MWT battery silk-screen printing defective products according to claim 4, which is characterized in that acid or acid with
The time of the mixed liquor cleaning of complexing agent is 1~6h, and the time of caustic dip is 5-20min.
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Address after: 214028 Xishi Road, Xinwu District, Wuxi City, Jiangsu Province Applicant after: Jiangsu Rituo Photovoltaic Technology Co., Ltd. Address before: 211800 No. 29 Buyue Road, Pukou Economic Development Zone, Nanjing City, Jiangsu Province Applicant before: Nanjing day care PV Polytron Technologies Inc |
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