CN107359289A - A kind of surface treatment method of lithium battery cover plate - Google Patents
A kind of surface treatment method of lithium battery cover plate Download PDFInfo
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- CN107359289A CN107359289A CN201710434335.8A CN201710434335A CN107359289A CN 107359289 A CN107359289 A CN 107359289A CN 201710434335 A CN201710434335 A CN 201710434335A CN 107359289 A CN107359289 A CN 107359289A
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- cover plate
- lithium battery
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- 238000000034 method Methods 0.000 title claims abstract description 32
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 29
- 238000004381 surface treatment Methods 0.000 title claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 39
- 238000001035 drying Methods 0.000 claims abstract description 16
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims description 22
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 244000137852 Petrea volubilis Species 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 239000013527 degreasing agent Substances 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims description 8
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000005238 degreasing Methods 0.000 claims description 6
- 238000005530 etching Methods 0.000 claims description 6
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- WBZKQQHYRPRKNJ-UHFFFAOYSA-L disulfite Chemical compound [O-]S(=O)S([O-])(=O)=O WBZKQQHYRPRKNJ-UHFFFAOYSA-L 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical class [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 5
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 5
- 235000002906 tartaric acid Nutrition 0.000 claims description 5
- 239000011975 tartaric acid Substances 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 30
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 11
- 229910000838 Al alloy Inorganic materials 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- UKWHYYKOEPRTIC-UHFFFAOYSA-N mercury(ii) oxide Chemical compound [Hg]=O UKWHYYKOEPRTIC-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 229940075397 calomel Drugs 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical compound Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229940101209 mercuric oxide Drugs 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/155—Lids or covers characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Primary Cells (AREA)
Abstract
The invention discloses a kind of surface treatment method of lithium battery cover plate, comprise the following steps：（1）Lid surface pretreatment,（2）Phosphating solution preparation,（3）Lid surface phosphorating treatment,（4）Drying process.The present invention has carried out special phosphating process processing to lithium battery cap plate surface, effectively improve the thickness and compactness of phosphating coat, improve the bond strength between phosphating coat and cover plate matrix, cover plate after final process has good anti-rotten rustless property, the overall service life of lithium battery is extended, popularizing value is preferable.
Description
Technical field
The invention belongs to lithium battery processing technique field, and in particular to a kind of surface treatment method of lithium battery cover plate.
Background technology
Lithium battery has big operating voltage height, energy density, discharging voltage balance, circulation compared with other secondary cells
Long lifespan and advantages of environment protection, the fields such as portable type electronic product and electric tool are had been widely used for, and be expected to
As one of the main energy sources of following hybrid vehicle and pure power vehicle supply.Existing most lithium battery external materials are
Be made up of aluminium alloy, external structure can be divided into shell and cover plate, shell be by aluminium alloy square shell made of punching stretch,
The end of shell is configured with cover plate, and cover plate material is also aluminium alloy, which is provided with internal thread of pole column, external screw thread etc., cover plate is lithium
One of essential part of battery.Require that lithium battery cover plate has certain anti-rotten rustless property when in use, to lift lithium
The overall service life of battery.
The content of the invention
The purpose of the present invention is to be directed to the problem of existing, there is provided a kind of surface treatment method of lithium battery cover plate.
The present invention is achieved by the following technical solutions：
A kind of surface treatment method of lithium battery cover plate, comprises the following steps：
（1）Lid surface pre-processes：
A. it is first with sand paper that the oxidation film layer removal of lid surface is standby；
B. the cover plate after a processing will be operated and be put into degreaser progress degreasing removal of impurities processing, after the completion of take out it is standby；
C. the cover plate after b is handled will be operated and be put into 8 ~ 10min of alkaline etching processing in the sodium hydroxide solution that concentration is 13 ~ 16g/L, it is complete
It is standby into rear taking-up；
D. will operate the cover plate after c processing immerse in deionized water take out after 20 ~ 25min of cleaning treatment it is standby；
（2）Phosphating solution is prepared：
Following material is weighed by weight：4 ~ 7 parts of sodium dihydrogen phosphates, 1.5 ~ 2.5 parts of phosphoric acid, 0.2 ~ 0.5 part of tartaric acid, 0.5 ~ 1
Part sodium carbonate, 0.3 ~ 0.6 part of calgon, 1 ~ 2 part of zinc nitrate, 0.5 ~ 1.5 part of caprolactam, 0.1 ~ 0.3 part of dialkyl group two
Aniline, 1 ~ 3 part of ethylene glycol, 140 ~ 150 parts of water；Above-mentioned substance is mixed jointly be put into stirred in homogenizer after phosphorus
It is standby to change liquid；
（3）Lid surface phosphorating treatment：
By step（1）Cover plate after processing is immersed in step（2）In the phosphating solution of gained, it is 41 that heating, which keeps the temperature of phosphating solution,
~ 44 DEG C, cover plate is taken out after 10 ~ 13min of phosphorating treatment standby；
（4）Drying process：
With deionized water to step（3）After cover plate after processing is rinsed, then puts it into drying box and be dried, dry
Taken out after to constant weight.
Further, step（1）The sand paper operated described in a is 300 mesh.
Further, step（1）It by concentration is 30 ~ 35g/L sodium carbonate liquor and dense that degreaser described in operation b, which is,
The metabisulfite solution for 40 ~ 45g/L is spent according to volume ratio 1：1 mixes.
Further, step（2）Described in homogenizer mixing speed control be 800 ~ 1000 revs/min.
Further, step（4）Described in drying when temperature control be 79 ~ 84 DEG C.
Lithium battery cap plate material is aluminium alloy, can be more to method that it is surface-treated, and wherein phosphorization treatment process is relative
Simply, widely use.Ineffective, the phosphatization film thickness deposited produced by aluminum alloy surface of conventional phosphatizing handling process
Small, compactness is not high, and causing its corrosion-resistant etc., performance is bad, it is necessary to further be lifted.The present invention is carried out for this problem
Improve, special surface treatment has been carried out to lithium battery cover plate, wherein first carrying out sand paper polishing to its surface, degreasing is removed and lived together
Reason, alkaline etching processing, the pretreatment operation of deionized water cleaning treatment, improve the characteristic of lid surface, are established for follow-up processing
Determine basis, and uniqueness has prepared phosphating solution, and the compositions such as caprolactam, dialkyl diphenylamine are with the addition of in phosphating solution, its
Phosphatic nucleation when middle caprolactam can promote phosphatization, dialkyl diphenylamine can strengthen containing for the groups such as caprolactam end amido
Amount, and then improve the absorption bond strength between caprolactam and phosphatization film component, because caprolactam, dialkyl diphenylamine add
Add, the activity group content increase on phosphating coat, the bond strength of phosphating coat and lid surface is lifted, so as to improve processing effect
Fruit.
The present invention has advantages below compared with prior art：
The present invention has carried out special phosphating process processing to lithium battery cap plate surface, effectively improves thickness and the cause of phosphating coat
Close property, improves the bond strength between phosphating coat and cover plate matrix, and the cover plate after final process has good anti-rotten rust-preventing characteristic
Can, the overall service life of lithium battery is extended, popularizing value is preferable.
Embodiment
Embodiment 1
A kind of surface treatment method of lithium battery cover plate, comprises the following steps：
（1）Lid surface pre-processes：
A. it is first with sand paper that the oxidation film layer removal of lid surface is standby；
B. the cover plate after a processing will be operated and be put into degreaser progress degreasing removal of impurities processing, after the completion of take out it is standby；
C. will operate b processing after cover plate be put into concentration be 13g/L sodium hydroxide solution in alkaline etching handle 8min, after the completion of take
Go out standby；
D. will operate the cover plate after c processing immerse in deionized water take out after cleaning treatment 20min it is standby；
（2）Phosphating solution is prepared：
Following material is weighed by weight：4 parts of sodium dihydrogen phosphates, 1.5 parts of phosphoric acid, 0.2 part of tartaric acid, 0.5 part of sodium carbonate, 0.3
Part calgon, 1 part of zinc nitrate, 0.5 part of caprolactam, 0.1 part of dialkyl diphenylamine, 1 part of ethylene glycol, 140 parts of water；Will be upper
State material jointly mixing be put into stirred in homogenizer after phosphating solution it is standby；
（3）Lid surface phosphorating treatment：
By step（1）Cover plate after processing is immersed in step（2）In the phosphating solution of gained, it is 41 that heating, which keeps the temperature of phosphating solution,
DEG C, cover plate taken out after phosphorating treatment 10min standby；
（4）Drying process：
With deionized water to step（3）After cover plate after processing is rinsed, then puts it into drying box and be dried, dry
Taken out after to constant weight.
Further, step（1）The sand paper operated described in a is 300 mesh.
Further, step（1）Degreaser described in operation b is the sodium carbonate liquor and concentration for 30g/L by concentration
For 40g/L metabisulfite solution according to volume ratio 1：1 mixes.
Further, step（2）Described in homogenizer mixing speed control be 800 revs/min.
Further, step（4）Described in drying when temperature control be 79 ~ 80 DEG C.
Embodiment 2
A kind of surface treatment method of lithium battery cover plate, comprises the following steps：
（1）Lid surface pre-processes：
A. it is first with sand paper that the oxidation film layer removal of lid surface is standby；
B. the cover plate after a processing will be operated and be put into degreaser progress degreasing removal of impurities processing, after the completion of take out it is standby；
C. will operate b processing after cover plate be put into concentration be 15g/L sodium hydroxide solution in alkaline etching handle 9min, after the completion of take
Go out standby；
D. will operate the cover plate after c processing immerse in deionized water take out after cleaning treatment 22min it is standby；
（2）Phosphating solution is prepared：
Following material is weighed by weight：6 parts of sodium dihydrogen phosphates, 2 parts of phosphoric acid, 0.4 part of tartaric acid, 0.8 part of sodium carbonate, 0.5 part
Calgon, 1.5 parts of zinc nitrates, 1 part of caprolactam, 0.2 part of dialkyl diphenylamine, 2 parts of ethylene glycol, 145 parts of water；Will be above-mentioned
Material jointly mixing be put into stirred in homogenizer after phosphating solution it is standby；
（3）Lid surface phosphorating treatment：
By step（1）Cover plate after processing is immersed in step（2）In the phosphating solution of gained, it is 42 that heating, which keeps the temperature of phosphating solution,
DEG C, cover plate taken out after phosphorating treatment 12min standby；
（4）Drying process：
With deionized water to step（3）After cover plate after processing is rinsed, then puts it into drying box and be dried, dry
Taken out after to constant weight.
Further, step（1）The sand paper operated described in a is 300 mesh.
Further, step（1）Degreaser described in operation b is the sodium carbonate liquor and concentration for 33g/L by concentration
For 42g/L metabisulfite solution according to volume ratio 1：1 mixes.
Further, step（2）Described in homogenizer mixing speed control be 900 revs/min.
Further, step（4）Described in drying when temperature control be 80 ~ 82 DEG C.
Embodiment 3
A kind of surface treatment method of lithium battery cover plate, comprises the following steps：
（1）Lid surface pre-processes：
A. it is first with sand paper that the oxidation film layer removal of lid surface is standby；
B. the cover plate after a processing will be operated and be put into degreaser progress degreasing removal of impurities processing, after the completion of take out it is standby；
C. the cover plate after b is handled will be operated and be put into alkaline etching processing 10min in the sodium hydroxide solution that concentration is 16g/L, after the completion of
Take out standby；
D. will operate the cover plate after c processing immerse in deionized water take out after cleaning treatment 25min it is standby；
（2）Phosphating solution is prepared：
Following material is weighed by weight：7 parts of sodium dihydrogen phosphates, 2.5 parts of phosphoric acid, 0.5 part of tartaric acid, 1 part of sodium carbonate, 0.6 part
Calgon, 2 parts of zinc nitrates, 1.5 parts of caprolactams, 0.3 part of dialkyl diphenylamine, 3 parts of ethylene glycol, 150 parts of water；Will be above-mentioned
Material jointly mixing be put into stirred in homogenizer after phosphating solution it is standby；
（3）Lid surface phosphorating treatment：
By step（1）Cover plate after processing is immersed in step（2）In the phosphating solution of gained, it is 44 that heating, which keeps the temperature of phosphating solution,
DEG C, cover plate taken out after phosphorating treatment 13min standby；
（4）Drying process：
With deionized water to step（3）After cover plate after processing is rinsed, then puts it into drying box and be dried, dry
Taken out after to constant weight.
Further, step（1）The sand paper operated described in a is 300 mesh.
Further, step（1）Degreaser described in operation b is the sodium carbonate liquor and concentration for 35g/L by concentration
For 45g/L metabisulfite solution according to volume ratio 1：1 mixes.
Further, step（2）Described in homogenizer mixing speed control be 1000 revs/min.
Further, step（4）Described in drying when temperature control be 83 ~ 84 DEG C.
Comparative example 1
This comparative example 1 compared with Example 2, in step（2）During phosphating solution is prepared, dialkyl diphenylamine composition is not added,
Method and step all same in addition.
Comparative example 2
This comparative example 2 compared with Example 2, in step（2）During phosphating solution is prepared, caprolactam composition is not added, except this
Outer method and step all same.
Comparative example 3
This comparative example 3 compared with Example 2, in step（2）During phosphating solution is prepared, caprolactam and dialkyl group two are not added
Aniline composition, method and step all same in addition.
In order to contrast effect of the present invention, from a collection of manufactured lithium battery cover plate（Aluminum alloy materials, concrete component are：
Aluminium 75%, magnesium 12%, zinc 8%, titanium 5%, above-mentioned percentage are weight percentage）, then implemented respectively with above-described embodiment 2, contrast
Example 1, comparative example 2, the method described in comparative example 3 are surface-treated, and then the finished product cover plate after processing is carried out
Performance test, specific correction data see the table below 1：
Table 1
| Corrosion potential Ecorr（V） | Corrosion current density icorr（A/cm2） | |
| Embodiment 2 | -1.004 | 0.063 |
| Comparative example 1 | -1.202 | 0.210 |
| Comparative example 2 | -1.398 | 0.466 |
| Comparative example 3 | -1.417 | 0.489 |
| Blank control group | -1.725 | 0.645 |
Note：Corrosion potential and corrosion current density described in upper table 1 are obtained by electro-chemical test, and concrete mode is
Using the aluminium alloy cover plate after alignment processing as working electrode, using platinum electrode as auxiliary electrode, with mercuric oxide electrode and saturation
For calomel electrode as reference electrode, electrolytic solution is the NaCl solution of mass fraction 3.5%, measures different aluminum alloys electrode samples
Tafel curve, the surface sweeping scope for controlling test potential is OCP ± 1.5V, and scan frequency is arranged to 0.5mV/s, by
This draws corrosion potential and corrosion current density.
By it can be seen from upper table 1 the inventive method processing after lithium battery aluminium alloy cover plate corresponding to corrosion potential and
Corrosion current density, which has, largely to be declined, and the reduction of corrosion potential and corrosion current density shows as it and resisted
Corrosive lifting, namely the present invention can effectively improve the antiseptic and rustproof characteristic of lithium battery cover plate, surface granosealing effect
More preferably, popularizing value is higher.
Claims (5)
1. a kind of surface treatment method of lithium battery cover plate, it is characterised in that comprise the following steps：
（1）Lid surface pre-processes：
A. it is first with sand paper that the oxidation film layer removal of lid surface is standby；
B. the cover plate after a processing will be operated and be put into degreaser progress degreasing removal of impurities processing, after the completion of take out it is standby；
C. the cover plate after b is handled will be operated and be put into 8 ~ 10min of alkaline etching processing in the sodium hydroxide solution that concentration is 13 ~ 16g/L, it is complete
It is standby into rear taking-up；
D. will operate the cover plate after c processing immerse in deionized water take out after 20 ~ 25min of cleaning treatment it is standby；
（2）Phosphating solution is prepared：
Following material is weighed by weight：4 ~ 7 parts of sodium dihydrogen phosphates, 1.5 ~ 2.5 parts of phosphoric acid, 0.2 ~ 0.5 part of tartaric acid, 0.5 ~ 1
Part sodium carbonate, 0.3 ~ 0.6 part of calgon, 1 ~ 2 part of zinc nitrate, 0.5 ~ 1.5 part of caprolactam, 0.1 ~ 0.3 part of dialkyl group two
Aniline, 1 ~ 3 part of ethylene glycol, 140 ~ 150 parts of water；Above-mentioned substance is mixed jointly be put into stirred in homogenizer after phosphorus
It is standby to change liquid；
（3）Lid surface phosphorating treatment：
By step（1）Cover plate after processing is immersed in step（2）In the phosphating solution of gained, it is 41 that heating, which keeps the temperature of phosphating solution,
~ 44 DEG C, cover plate is taken out after 10 ~ 13min of phosphorating treatment standby；
（4）Drying process：
With deionized water to step（3）After cover plate after processing is rinsed, then puts it into drying box and be dried, dry
Taken out after to constant weight.
A kind of 2. surface treatment method of lithium battery cover plate according to claim 1, it is characterised in that step（1）Operate a
Described in sand paper be 300 mesh.
A kind of 3. surface treatment method of lithium battery cover plate according to claim 1, it is characterised in that step（1）Operate b
Described in degreaser be by the sodium carbonate liquor that concentration is 30 ~ 35g/L and the metabisulfite solution that concentration is 40 ~ 45g/L according to
Volume ratio 1：1 mixes.
A kind of 4. surface treatment method of lithium battery cover plate according to claim 1, it is characterised in that step（2）Middle institute
The mixing speed control for the homogenizer stated is 800 ~ 1000 revs/min.
A kind of 5. surface treatment method of lithium battery cover plate according to claim 1, it is characterised in that step（4）Middle institute
The temperature control during drying stated is 79 ~ 84 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710434335.8A CN107359289A (en) | 2017-06-09 | 2017-06-09 | A kind of surface treatment method of lithium battery cover plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710434335.8A CN107359289A (en) | 2017-06-09 | 2017-06-09 | A kind of surface treatment method of lithium battery cover plate |
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| Publication Number | Publication Date |
|---|---|
| CN107359289A true CN107359289A (en) | 2017-11-17 |
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| CN201710434335.8A Pending CN107359289A (en) | 2017-06-09 | 2017-06-09 | A kind of surface treatment method of lithium battery cover plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Application publication date: 20171117 |