CN103194743B - Surface treatment method of nickel metal strip for lithium-ion battery negative electrode ear - Google Patents
Surface treatment method of nickel metal strip for lithium-ion battery negative electrode ear Download PDFInfo
- Publication number
- CN103194743B CN103194743B CN201310080486.XA CN201310080486A CN103194743B CN 103194743 B CN103194743 B CN 103194743B CN 201310080486 A CN201310080486 A CN 201310080486A CN 103194743 B CN103194743 B CN 103194743B
- Authority
- CN
- China
- Prior art keywords
- acid
- metal strip
- nickel metal
- nickel
- sodium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Chemical Treatment Of Metals (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention discloses a surface treatment method of a nickel metal strip for a lithium-ion battery negative electrode ear. The method includes two steps. A treatment liquid in a first step includes at least a hexavalent chromium compound, a fluorine compound, and a phosphorus compound. A treatment liquid in a second step includes at least organic acid, inorganic acid, and a fluorine compound. A chemical conversion film is formed by heating and drying after applying the treatment liquid on the surface of the nickel metal strip. The nickel metal strip treated by the method of the present invention after hot pressing with an ear adhesive has excellent electrolyte resistance property. The nickel metal strip is directly immersed in the electrolyte at 85 DEG C for 4.5 hours. The bonding strength is almost unchanged. Meanwhile, the nickel metal strip after treatment still has good soldering properties, and can be directly soldered on the surface thereof. The metal nickel strip is used for the production of lithium ion battery ears. The production process can be simplified. The cost is reduced.
Description
Technical field
The present invention relates to the surface treatment of lithium ionic cell nickel metal strip, metallic nickel bar after process, not only has excellent tin-welding, and with tab heat pressure adhesive after there is splendid electrolyte resistance performance, can be used for the negative lug of producing lithium ion battery, particularly polymer Li-ion battery.
Background technology
Lithium ion battery is a kind of rechargeable cell, because its operating voltage is high, have extended cycle life, the advantage such as specific energy is high, memory-less effect, self-discharge are little, be widely used in the electronicss such as digital product and new energy electric motor vehicle such as mobile phone, notebook computer, pick up camera and device.
Polymer Li-ion battery replaces liquid electrolyte with solid polymer electrolyte, and this polymkeric substance can be " dry state ", also can be " colloidal state ", and major part adopts colloidal polymer electrolyte at present.Compared with liquid lithium ionic cell, polymer Li-ion battery is safer, because the possibility of electrolyte leakage is less, and polymer Li-ion battery can be accomplished less, thinner, and can be made into the battery of arbitrary shape.Therefore, the market requirement of polymer Li-ion battery is always in sustainable growth.
Nickel lug is the metallic conductor for being extracted from battery core by negative pole in polymer Li-ion battery, requires to have excellent electrolyte resistance and tin-welding.But existing polymer Li-ion battery nickel lug tin-welding is undesirable, the manufacturing process of battery is made to become complicated.Common way is before carrying out soldering, and first polish in soldering place with sand paper, this not only increases operation, reduces production efficiency, and causes cost increase.Chinese patent (application number is 200910190249.2) discloses a kind of polymer battery lug and surface treatment method thereof, it adopts ammonium bifluoride, chromic oxide, boric acid, sodium phosphate to process lug, the electrolyte resistance of gained lug is excellent, but the problem of tin-welding difference does not still solve.
In sum, be badly in need of a kind of new nickel metal surface treatment technology, while its electrolyte resistance performance of raising, keep the tin-welding of nickel constant, directly to carry out soldering on its surface.
Summary of the invention
The object of the present invention is to provide a kind of new nickel metal surface treating method, metallic nickel bar through the method process not only has excellent electrolyte resistance performance, and have good can tin-welding, directly can carry out soldering on its surface, for the production of polymer Li-ion battery negative lug.
The present invention is achieved by the following technical solutions:
For a surface treatment method for the nickel metal strip of lithium ionic cell cathode ear pole, it is characterized in that, described surface treatment method comprises the following steps:
1), preparation the first step treatment solution, the first step treatment solution, at least contains in often liter for the treatment of solution for solvent with water or deionized water:
Hexavalent chromium compound 0.5 ~ 30g/l
Phosphorus compound 10 ~ 60g/l
Fluorine cpd 0.5 ~ 20g/l,
Described hexavalent chromium compound is be selected from one or more in chromic oxide, chromium chloride, lithium chromate, Sodium chromate, potassium bichromate, sodium dichromate 99,
Described phosphorus compound is be selected from one or more in phosphoric acid, polyphosphoric acid, tetra-sodium and salt compounds thereof,
Described fluorine cpd are be selected from one or more in Sodium Fluoride, Neutral ammonium fluoride, Potassium monofluoride, hydrofluoric acid, fluoroboric acid, sodium hydrogen fluoride;
2), by the first step treatment solution be heated to 30 ~ 70 DEG C and be applied in nickel bar surface, the treatment time is 2 ~ 10min;
3), preparation second step treatment solution, second step treatment solution, at least contains in often liter for the treatment of solution for solvent with water or deionized water:
Organic acid 5 ~ 40g/l
Fluorine cpd 0.5 ~ 20g/l
Mineral acid 5 ~ 40g/l
Described organic acid is be selected from one or more in oxalic acid, citric acid, vinylformic acid, succinic acid, tartrate, oxysuccinic acid,
Described fluorine cpd are be selected from one or more in Sodium Fluoride, Neutral ammonium fluoride, Potassium monofluoride, hydrofluoric acid, fluoroboric acid, sodium hydrogen fluoride,
Described mineral acid is be selected from one or more in nitric acid, hydrofluoric acid, phosphoric acid, boric acid, hydrochloric acid, sulfuric acid,
4), will through step 2) after the nickel metal strip water cleaning that processes, second step treatment solution is heated to 40 ~ 80 DEG C and is applied in nickel bar surface, the treatment time is 2 ~ 10min;
5), by nickel metal strip through 60 ~ 150 DEG C of heat dryings, chemical conversion rete is formed.
The nickel purity of above-mentioned nickel metal strip is more than 99.5%, and thickness is 0.02 ~ 0.2mm.
The salt of described phosphoric acid, polyphosphoric acid, tetra-sodium is one or more in primary ammonium phosphate, potassium primary phosphate, SODIUM PHOSPHATE, MONOBASIC, zinc phosphate, triammonium phosphate, tertiary sodium phosphate, Tripotassium phosphate, trisodium phosphate, potassium pyrophosphate, Sodium Acid Pyrophosphate.
Described application process treatment solution being applied in nickel bar surface is: by the one in immersion method, stick coating method, spin-coating method, spraying method, treatment solution is coated on nickel bar surface.
Nickel of the present invention forms one deck chemical conversion rete after surface treatment on surface, nickel and tab firmly adhere to each other and go bad to used gel electrolyte and gel electrolyte or be hydrolyzed the hydrofluoric acid produced and has erosion resistance by this layer of chemical conversion film layer, can make the tin-welding that nickel keeps good.
The chemical conversion rete of described nickel surface can easily realize, such as, use the water treatment liquid containing hexavalent chromium compound, fluorine cpd, phosphorus compound at nickel surface, after water cleaning, use the water treatment liquid containing organic acid, fluorine cpd, mineral acid again, dry through water cleaning post-heating
Beneficial effect
The present invention is for the preparation of the negative lug of polymer Li-ion battery, through the nickel metal strip of the technology of the present invention process, with the black glue of the yellow glue of Japanese DNP, Showa after heat pressure adhesive, there is excellent electrolyte resistance performance, 4.5 hours are directly soaked through 85 DEG C of electrolytic solution, cohesive strength is substantially constant, can ensure the stopping property that the battery after encapsulating is permanent in subsequent storage and use procedure to improve the security of battery and electrical equipment thereof.
Through the nickel metal strip of the technology of the present invention process, not only there is excellent electrolyte resistance performance but also there is good soldering performance, directly can carry out soldering on its surface, simplify the manufacturing process of lug, and can production cost be reduced.
Embodiment
Composition contained in treatment solution is as follows:
Composition (A) hexavalent chromium compound
A-1: chromium trioxide
A-2: Sodium chromate
A-3: sodium dichromate 99
Composition (B) phosphorus compound
B-1: phosphoric acid
B-2: trisodium phosphate
Composition (C) fluorine cpd
C-1: Sodium Fluoride
C-2: Potassium monofluoride
Composition (D) organic acid
D-1: oxalic acid
D-2: citric acid
D-3: vinylformic acid
Composition (E) mineral acid
E-1: hydrochloric acid
E-2: nitric acid
The first step treatment solution: in every premium on currency, mixes according to the amount (mol) of often kind of mentioned component shown in table one, preparation aqueous treatment agent a to e.
Table one
Unit: mol/L
Second step treatment solution: in every premium on currency, mixes according to the amount (mol) of often kind of mentioned component shown in table two, preparation aqueous treatment agent f to j.
Table two
Unit: mol/L
Embodiment 1
The preparation for the treatment of solution: water or deionized water are solvent, the first step treatment solution is a, and second step treatment solution is f;
Treatment process:
(1) remove nickel bar surface grease, clean up with tap water;
(2) the nickel bar processed through (1) is immersed 6min in the first step treatment solution of 40 DEG C, clean up with tap water;
(3) the nickel bar processed through (2) is immersed 8min in the second step treatment solution of 40 DEG C, clean up with tap water;
(4) the nickel bar that will process through (3) is through 80 DEG C of heat dryings.
Embodiment 2
The preparation for the treatment of solution: the first step treatment solution is b, second step treatment solution is g;
Treatment process:
(1) remove nickel bar surface grease, clean up with tap water;
(2) the nickel bar processed through (1) is immersed 6min in the first step treatment solution of 40 DEG C, clean up with tap water;
(3) the nickel bar processed through (2) is immersed 8min in the second step treatment solution of 40 DEG C, clean up with tap water;
(4) the nickel bar that will process through (3) is through 80 DEG C of heat dryings.
Embodiment 3
The preparation for the treatment of solution: the first step treatment solution is c, second step treatment solution is h;
Treatment process:
(1) surface nickel bar is except degrease, cleans up with tap water;
(2) the nickel bar processed through (1) is immersed 6min in the first step treatment solution of 40 DEG C, clean up with tap water;
(3) the nickel bar processed through (2) is immersed 8min in the second step treatment solution of 40 DEG C, clean up with tap water;
(4) the nickel bar that will process through (3) is through 80 DEG C of heat dryings.
Embodiment 4
The preparation for the treatment of solution: the first step treatment solution is d, second step treatment solution is i;
Treatment process:
(1) remove nickel bar surface grease, clean up with tap water;
(2) the nickel bar that will process through (1) sprays process 6min in the first step treatment solution of 40 DEG C, cleans up with tap water;
(3) the nickel bar that will process through (2) sprays process 8min in the second step treatment solution of 40 DEG C, cleans up with tap water;
(4) the nickel bar that will process through (3) is through 80 DEG C of heat dryings.
Embodiment 5
The preparation for the treatment of solution: the first step treatment solution is e, second step treatment solution is j;
Treatment process:
(1) remove nickel bar surface grease, clean up with tap water;
(2) the nickel bar that will process through (1) sprays process 6min in the first step treatment solution of 40 DEG C, cleans up with tap water;
(3) the nickel bar that will process through (2) sprays process 8min in the second step treatment solution of 40 DEG C, cleans up with tap water;
(4) the nickel bar that will process through (3) is through 80 DEG C of heat dryings.
By above-mentioned treated nickel metal strip for the preparation of production lithium ionic cell cathode ear pole, after treated nickel metal strip and tab heat pressure adhesive, directly soak with electrolytic solution, at 85 DEG C, in 4.5 hours, its cohesive strength is almost constant; Meanwhile, the nickel metal strip after process still has good soldering performance, directly can carry out soldering on its surface, and after soldering, metallic tin can be laid in nickel bar surface.This metallic nickel bar is used for the production of lithium ion cell polar ear, can simplify production technique, and reduce costs.
Claims (4)
1. for a surface treatment method for the nickel metal strip of lithium ionic cell cathode ear pole, it is characterized in that, described surface treatment method comprises the following steps:
1), preparation the first step treatment solution, the first step treatment solution, at least contains in often liter for the treatment of solution for solvent with water or deionized water:
Hexavalent chromium compound 0.5 ~ 30g/l
Phosphorus compound 10 ~ 60g/l
Fluorine cpd 0.5 ~ 20g/l,
Described hexavalent chromium compound is be selected from one or more in chromic oxide, lithium chromate, Sodium chromate, potassium bichromate, sodium dichromate 99, described phosphorus compound is be selected from one or more in phosphoric acid, polyphosphoric acid, tetra-sodium and salt thereof, and described fluorine cpd are be selected from one or more in Sodium Fluoride, Neutral ammonium fluoride, Potassium monofluoride, hydrofluoric acid, fluoroboric acid, sodium hydrogen fluoride;
2), by the first step treatment solution be heated to 30 ~ 70 DEG C and be applied in nickel bar surface, the treatment time is 2 ~ 10min;
3), preparation second step treatment solution, second step treatment solution, at least contains in often liter for the treatment of solution for solvent with water or deionized water:
Organic acid 5 ~ 40g/l
Fluorine cpd 0.5 ~ 20g/l
Mineral acid 5 ~ 40g/l
Described organic acid is be selected from one or more in oxalic acid, citric acid, vinylformic acid, succinic acid, tartrate, oxysuccinic acid,
Step 3) described in fluorine cpd be selected from one or more in Sodium Fluoride, Neutral ammonium fluoride, Potassium monofluoride, hydrofluoric acid, fluoroboric acid, sodium hydrogen fluoride,
Described mineral acid is be selected from one or more in nitric acid, hydrofluoric acid, phosphoric acid, boric acid, hydrochloric acid, sulfuric acid,
4), will through step 2) after the nickel metal strip water cleaning that processes, second step treatment solution is heated to 40 ~ 80 DEG C and is applied in nickel bar surface, the treatment time is 2 ~ 10min;
5), by nickel metal strip through 60 ~ 150 DEG C of heat dryings, chemical conversion rete is formed.
2. as claimed in claim 1 for the surface treatment method of the nickel metal strip of lithium ionic cell cathode ear pole, it is characterized in that, described phosphoric acid, the salt of tetra-sodium are one or more in primary ammonium phosphate, potassium primary phosphate, SODIUM PHOSPHATE, MONOBASIC, zinc phosphate, triammonium phosphate, tertiary sodium phosphate, Tripotassium phosphate, trisodium phosphate, potassium pyrophosphate, Sodium Acid Pyrophosphate.
3. as claimed in claim 1 for the surface treatment method of the nickel metal strip of lithium ionic cell cathode ear pole, it is characterized in that, described application process treatment solution being applied in nickel bar surface is: by the one in immersion method, stick coating method, spin-coating method, spraying method, treatment solution is coated on nickel bar surface.
4., as claimed in claim 1 for the surface treatment method of the nickel metal strip of lithium ionic cell cathode ear pole, it is characterized in that, the nickel purity of described nickel metal strip is greater than 99.5%, and thickness is 0.02 ~ 0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310080486.XA CN103194743B (en) | 2013-03-13 | 2013-03-13 | Surface treatment method of nickel metal strip for lithium-ion battery negative electrode ear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310080486.XA CN103194743B (en) | 2013-03-13 | 2013-03-13 | Surface treatment method of nickel metal strip for lithium-ion battery negative electrode ear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103194743A CN103194743A (en) | 2013-07-10 |
| CN103194743B true CN103194743B (en) | 2014-12-24 |
Family
ID=48717556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310080486.XA Expired - Fee Related CN103194743B (en) | 2013-03-13 | 2013-03-13 | Surface treatment method of nickel metal strip for lithium-ion battery negative electrode ear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103194743B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702907B (en) * | 2016-04-06 | 2018-01-30 | 东莞市安德丰电池有限公司 | A kind of soft package lithium battery yellow glue and application method |
| CN108930043A (en) * | 2018-08-15 | 2018-12-04 | 东莞市同盛电子科技有限公司 | A kind of cleaning agent and preparation method thereof removing metal oxide layer and application method |
| CN109967437A (en) * | 2018-11-26 | 2019-07-05 | 深圳市德惠电池材料有限公司 | A kind of easy welding electrode connection sheet blank treatment process |
| CN111235560A (en) * | 2020-03-20 | 2020-06-05 | 无锡雷德环保设备有限公司 | Process for passivating hexavalent chromium of phosphorus chemical nickel coating in new energy automobile electrode material |
| CN115042483A (en) * | 2022-05-30 | 2022-09-13 | 广东维都利新能源有限公司 | Multi-metal bonding mechanism with corrosion resistance and bonding method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL107091C (en) * | 1957-01-31 | |||
| JPS6187878A (en) * | 1984-10-03 | 1986-05-06 | Nippon Light Metal Co Ltd | Formation of corrosion resistant hydrophilic film |
| CN101667632A (en) * | 2009-09-25 | 2010-03-10 | 深圳世纪新能源电池有限公司 | Polymer battery lug and surface processing method thereof |
| CN102376984B (en) * | 2010-08-25 | 2013-07-31 | 惠州泰科立集团股份有限公司 | Ultrathin rechargeable battery and manufacturing process thereof |
-
2013
- 2013-03-13 CN CN201310080486.XA patent/CN103194743B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103194743A (en) | 2013-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103194743B (en) | Surface treatment method of nickel metal strip for lithium-ion battery negative electrode ear | |
| RU2620258C2 (en) | Compositions for preliminary treatment, and also methods of applying coating on battery electrode | |
| JP5119277B2 (en) | ELECTRODE FOR LITHIUM SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME | |
| JP6060381B2 (en) | Electrolytic capacitor and manufacturing method thereof | |
| CN100399604C (en) | Method for treating surface of copper foil of affluxion body in lithium ion batteries | |
| CN101685713B (en) | Method for manufacturing Active carbon fiber electrode super capacitor and electrode | |
| JP5498645B2 (en) | Lithium secondary battery | |
| CN110444731B (en) | Method for modifying cathode interface of all-solid-state lithium battery | |
| JP2017210680A (en) | Metal foil, production method of metal foil, and production method of electrode using them | |
| CN110212246A (en) | A kind of wide warm lithium-ion battery electrolytes and preparation method thereof | |
| CN101383228B (en) | Formation method of electrode foil for low voltage low leakage aluminum electrolysis capacitor | |
| JP2008159297A (en) | Aluminum foil, method for degreasing the same, electrode plate for battery, core material therefor using the aluminum foil, and lithium-ion secondary battery using them | |
| CN106356491B (en) | A kind of lithium ionic cell nickel tab production technology | |
| US7867652B2 (en) | Surface treatment for metal-polymer laminated electrochemical cell package | |
| JP6672971B2 (en) | Method of manufacturing electrode body | |
| CN103682366A (en) | Aluminum foil/carbon composite current collector, preparation method of current collector and lithium ion battery | |
| Li et al. | Lithium Bis (Trifluoromethanesulfonyl) Imide (LiTFSI): A Prominent Lithium Salt in Lithium‐Ion Battery Electrolytes–Fundamentals, Progress, and Future Perspectives | |
| CN106935784A (en) | A kind of lithium battery pole ear surface treatment method | |
| JP4258711B2 (en) | Non-aqueous electrolyte battery | |
| CN103065801B (en) | Solid electrolytic capacitor preparation method and application | |
| CN103682367A (en) | Copper foil/carbon composite current collector, preparation method of current collector and lithium ion battery | |
| TWI834150B (en) | Electrolyte-solution composition and secondary battery using same | |
| KR101579781B1 (en) | Surface treatment method of lead tab for lithium ion polymer cell | |
| KR102364363B1 (en) | Process for preparing current collector for pseudo capacitor | |
| CN103000938A (en) | Lithium ion battery with graphene crystal slice as current collector and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20210313 |