CN110380123A - A kind of lithium ion button shape cell and its preparation process - Google Patents
A kind of lithium ion button shape cell and its preparation process Download PDFInfo
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- CN110380123A CN110380123A CN201910619839.6A CN201910619839A CN110380123A CN 110380123 A CN110380123 A CN 110380123A CN 201910619839 A CN201910619839 A CN 201910619839A CN 110380123 A CN110380123 A CN 110380123A
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- lithium ion
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 82
- 239000010959 steel Substances 0.000 claims abstract description 82
- 239000000178 monomer Substances 0.000 claims abstract description 81
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910052802 copper Inorganic materials 0.000 claims abstract description 53
- 239000010949 copper Substances 0.000 claims abstract description 53
- 239000003792 electrolyte Substances 0.000 claims abstract description 29
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 238000004513 sizing Methods 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 239000002002 slurry Substances 0.000 claims abstract description 17
- 239000011267 electrode slurry Substances 0.000 claims abstract description 16
- 238000004080 punching Methods 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims description 55
- 239000011248 coating agent Substances 0.000 claims description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000003513 alkali Substances 0.000 claims description 18
- 239000012153 distilled water Substances 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000007747 plating Methods 0.000 claims description 9
- 238000007605 air drying Methods 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000011149 active material Substances 0.000 claims description 6
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 6
- 229910000366 copper(II) sulfate Inorganic materials 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 5
- 238000007591 painting process Methods 0.000 claims description 5
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 3
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- -1 tinbase Chemical compound 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052493 LiFePO4 Inorganic materials 0.000 claims 1
- 239000010406 cathode material Substances 0.000 claims 1
- 238000005868 electrolysis reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 7
- 238000001035 drying Methods 0.000 description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000007581 slurry coating method Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010924 continuous production Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000007603 infrared drying Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000004804 winding Methods 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
- H01M10/0427—Button cells
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- 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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
-
- 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)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to technical field of lithium ion more particularly to a kind of lithium ion button shape cell and its preparation processes.The preparation process of lithium ion button shape cell of the present invention, comprising steps of (1) cleans steel band；(2) electro-coppering: it is once purged, in steel strip surface copper facing, form copper plated steel band；(3) slurry is coated with: anode sizing agent being coated on copper facing steel strip surface and forms positive plate, negative electrode slurry is coated on copper facing steel strip surface and forms negative electrode tab；(4) roll-in and punching: positive and negative plate carries out roll-in, punching processing, obtains positive monomer and cathode monomer；(5) it assembles: assembling to obtain lithium ion button shape cell according to positive monomer → electrolyte → diaphragm → electrolyte → sealing ring → cathode monomer.The preparation process of lithium ion button shape cell of the invention reduces preparation cost, simplifies process flow, and obtained lithium ion button shape cell is not only simple in structure and has preferable electrical property.
Description
Technical field
The present invention relates to technical field of lithium ion more particularly to a kind of lithium ion button shape cell and its preparation processes.
Background technique
Lithium ion battery can be divided into the types such as rectangular cell, cylindrical battery, button cell according to the difference of shape.Button electricity
Pond has the characteristics that frivolous, small be widely used in the small portable apparatus such as electronic watch, electronic balance, electronic toy.
In recent years, with the development of information technology and mobile communication equipment multifunction, terminal device to battery capacity, service life and
More stringent requirements are proposed for charge-discharge performance etc..The button cell being widely used at present has AgO battery, Zn-Mn battery, Li-
MnO2Battery etc., battery capacity is low, energy density is small, restricted lifetime and not can be recycled.Lithium ion button shape cell has
The advantages that energy density is big, discharge voltage is high, charge/discharge speed is fast, small in size, recyclable charge and discharge, market potential is huge.This
Outer lithium ion button shape cell is also widely applied in terms of battery performance test and evaluation.
Conventional lithium ion button cell is made of anode cover, positive plate, diaphragm, negative electrode tab, gasket and negative electrode casing, positive and negative
Pole shell is obtained using stainless steel punching press, and positive and negative plate is obtained by cutting on slurry coating collector, as Patent Application Publication No is
CN103840216A discloses a kind of lithium-ion button battery production method, uses eight footworks by negative electrode casing → nickel foam → negative
Pole piece → electrolyte → diaphragm → electrolyte → positive plate → anode cover → sealing assembled in sequence.For another example Patent Application Publication No is
Slurry is coated in aluminum foil current collector and does by a kind of method for preparing lithium-ion button battery disclosed in CN106058292A
It is sliced after dry, roll-in, positive/negative plate and the artificial multistep assembly of positive and negative anodes shell, diaphragm.Above traditional lithium ion button shape cell system
As technique, that there are production efficiencys is low, process flow is long, manual assembly is complicated, homogeneity of product is poor, furthermore battery capacity obtained
It is small, volume is big, the service life is short, be unable to satisfy the performance requirement of high-performance lithium ion button cell.
Summary of the invention
In order to solve problem above, the object of the present invention is to provide a kind of lithium ion button shape cell and preparation processes, reduce
Preparation cost, simplifies process flow, and the lithium ion button shape cell that is prepared is not only simple in structure and has preferable
Electrical property.
To achieve the above object, the preparation process of the lithium ion button shape cell designed by the present invention, comprising steps of
(1) it cleans steel band: steel band being immersed in greasy dirt, the dust for removing steel strip surface in alkali wash water, to steel band after alkali cleaning
Carry out washing removal alkali cleaning Liquid Residue, heated-air drying；
(2) electro-coppering: it is once purged, in steel strip surface copper facing, form copper plated steel band；
(3) slurry is coated with: anode sizing agent being coated on copper facing steel strip surface and forms positive plate, negative electrode slurry is coated on plating
Copper steel belt surface forms negative electrode tab, and positive plate forms positive coating after baking is dry, and negative electrode tab surface forms cathode coating；
(4) roll-in and punching: carrying out roll-in to positive plate and negative electrode tab, punching is handled, obtain circular positive monomer and
Circular cathode monomer；
(5) it assembles:
Assemble according to positive monomer → electrolyte → diaphragm → electrolyte → sealing ring → cathode monomer sequence
To lithium ion button shape cell.
With existing negative electrode casing → nickel foam → negative electrode tab → electrolyte → diaphragm → electrolyte → positive plate → anode cover →
Sealing assembled in sequence technique is compared, and the present invention carries out copper plating treatment in steel strip surface first and obtains copper plated steel, then starches anode
Material, which is coated in copper plated steel, forms positive monomer, and negative electrode slurry is coated in copper plated steel and forms cathode monomer, and wherein steel band had been both
Shell as lithium ion button shape cell is used as the matrix of active slurry again, with positive monomer instead of traditional anode cover and just
Pole piece reduces the assembling steps of component, simplifies technique stream with cathode monomer instead of traditional negative electrode tab and negative electrode casing
Journey；And by carrying out plating Copper treatment in steel strip surface, the electric conductivity of battery is improved, battery capacity and battery are forthright again
Can, will not because collector missing caused by battery electrical property reduction.
Preferably, in step (2) the electro-coppering step, electrolyte used in electro-coppering be 0.2~
0.5mol/L CuSO4+ 0.2~0.5mol/L H2SO4+ distilled water；The corresponding current density of the electro-coppering is 5~10A/
dm2。
Preferably, in step (3) the slurry coating, anode sizing agent active material is cobalt acid lithium, LiMn2O4, phosphorus
One of sour iron lithium, nickle cobalt lithium manganate, nickel cobalt lithium aluminate, negative electrode active material are graphite, graphene, lithium titanate, tinbase, silicon
One of carbon negative pole material.
Preferably, in step (3) slurry coating, positive coating and cathode coating with a thickness of 20~
100um。
Preferably, in step (3) the slurry coating, painting process, the applicator roll are realized by applicator roll
Surface be equipped with multiple round reticulate patterns, multiple circle reticulate patterns arrange on the surface of applicator roll in array, the round reticulate pattern it is straight
Diameter is 10~35mm, is divided into 5~10mm between two neighboring circle reticulate pattern.Using there is the applicator roll of round reticulate pattern by slurry
It is coated on steel band, the round coating in array arrangement can be obtained on steel band, in step (4) punching process, by steel band
On round coating be punched, without coating on the steel band given up, save the use of slurry, further save cost.
Preferably, in step (3) the slurry coating, baking temperature is 80~150 DEG C.
Preferably, in step (4) roll process, roll-in amount is 10~45%.
Preferably, in the step (5), the diameter of positive monomer is 0.5~1.5mm smaller than cathode monomer；It is described
Diaphragm is one of PE/PP polyolefin film, ceramic diaphragm, fibre diaphragm；The diaphragm outer diameter is bigger than positive and negative anodes monomer；It is described
It is sealed between sealing ring installation and positive and negative anodes monomer；Encapsulation is completed on battery sealing machine after battery assembly, obtains button electricity
Pond.
A kind of lithium ion button shape cell, which is characterized in that successively by positive monomer 17, electrolyte, diaphragm 18, electrolyte,
Sealing ring 19 and cathode monomer 20 are assembled, and the anode monomer includes positive electrode substrate 17.1, are electroplated in positive electrode substrate
Positive copper coating 17.2 and the anode sizing agent layer 17.3 being coated on positive copper coating, the cathode monomer 20 include cathode base
Body 20.1 is electroplated in the cathode copper coating 20.2 on cathode matrix and the negative electrode slurry layer being coated on cathode copper coating
20.3。
Preferably, electrolyte used in the plating is 0.2~0.5mol/L CuSO4+ 0.2~0.5mol/
L H2SO4+ distilled water；The current density of the plating is 5~10A/dm2。
Preferably, the diaphragm is one of PE/PP polyolefin film, ceramic diaphragm, fibre diaphragm.
Preferably, the positive electrode substrate 17.1 and cathode matrix 20.1 are stainless steel steel disc, the thickness of steel disc
For 10~30um.
Detailed description of the invention
Fig. 1 is the flow chart of the preparation process of lithium ion button shape cell of the present invention；
Fig. 2 is the structural schematic diagram of applicator roll；
Fig. 3 is the preparation technology flow chart of positive monomer；
Fig. 4 is lithium ion button shape cell structural schematic diagram of the invention；
Fig. 5 is the decomposition diagram of Fig. 4；
Wherein, 1-unwinding unit；2-unreel guide roller；3-alkaline baths；4-rinsing bowls；5-drying units；6-platings
Copper unit；7-DC power supplies；8-coater units；81-applicator rolls, 81.1-round reticulate patterns；9-pole pieces toast unit；10—
Roll squeezer；11-bickers；12-winding guide rollers；13-rolling units；14-steel bands；17-positive monomers；Positive electrode substrate
17.1；Positive copper coating 17.2；Anode sizing agent layer 17.3；18-diaphragms；19-sealing rings；20-cathode monomers；Cathode matrix
20.1；Cathode copper coating 20.2；Negative electrode slurry layer 20.3.
Specific embodiment
For a better understanding of the invention, invention is described in detail below with reference to drawings and concrete examples.
More to solve existing lithium ion button shape cell assembling assembly, the long problem of process flow, the present invention is first in steel band
Surface carries out copper plating treatment and obtains copper plated steel, and then anode sizing agent is coated in copper plated steel and forms positive monomer, cathode is starched
Material, which is coated in copper plated steel, forms cathode monomer, and wherein steel band had not only been used as the shell of lithium ion button shape cell but also had been used as active slurry
Matrix, with positive monomer instead of traditional anode cover and positive plate, with cathode monomer instead of traditional negative electrode tab and negative
Pole shell reduces the assembling steps of component, simplifies process flow.Below by by specific embodiment come to lithium of the invention
The preferred embodiment of the preparation process of ion button cell is described in detail.
Embodiment 1
The preparation process of lithium ion button shape cell, as shown in connection with fig. 1, comprising steps of
(1) clean steel band: steel band 14 is by unwinding unit 1 and unreels guide roller 2 and is delivered to alkaline bath 3 and rinsing bowl 4, by steel
Greasy dirt, the dust that 14 surface of steel band is removed in the alkali wash water for being immersed in alkaline bath 3 with 14 carry out washing to steel band 14 after alkali cleaning
Except alkali cleaning Liquid Residue, heated-air drying processing is carried out into drying unit 5；
Steel band 14 use stainless steel material, steel band 14 with a thickness of 10~30um；Alkali wash water is 15% ethyl alcohol+5%NaOH+
80% distilled water；Washing, which is adopted, to be washed with deionized, and heated-air drying is hot air convective drying.
(2) electro-coppering: after drying, copper plated steel band is formed in steel strip surface copper facing into copper facing unit 6；
Electrolyte used in electro-coppering is 0.3mol/L CuSO4+0.3mol/L H2SO4+ distilled water；Electro-coppering it is straight
The current density in galvanic electricity source 7 is 7A/dm2。
(3) slurry is coated with: after the completion of copper facing, into coater unit 8, anode sizing agent being coated on copper facing steel strip surface and is formed
Negative electrode slurry is coated on copper facing steel strip surface and forms negative electrode tab by positive plate, the positive plate after the pole piece baking baking of unit 9 is dry
Surface forms positive coating, and negative electrode tab surface forms cathode coating；
The active material of anode sizing agent is cobalt acid lithium, and negative electrode active material is graphite, and slurry uses intaglio plate coating or scraper
Coating realizes painting process by applicator roll, and as shown in connection with fig. 2, the surface of applicator roll 81 is equipped with multiple round reticulate patterns 81.1, more
A circle reticulate pattern 81.1 arranges on the surface of applicator roll 81 in array, and the diameter of round reticulate pattern 81.1 is 10mm, two neighboring
5mm is divided between round reticulate pattern；After drying, the thickness of positive coating and cathode coating is 20um.
(4) roll-in and punching: using roll squeezer 10 to the negative electrode tab and positive plate progress roller process after coating process, so
It is punched out processing using bicker 11 afterwards, obtains circular positive monomer 17 and circular cathode monomer 20；
The preparation process that positive monomer 17 is further illustrated in conjunction with Fig. 3, is to plate one layer of anode on 14 surface of steel band first
Then copper coating 17.2 coats multiple circular anode sizing agent layers 17.3 on positive 17.2 surface of copper coating using applicator roll, more
A anode sizing agent layer 17.3 is arranged in array on steel band, is finally punched into multiple round pole pieces by bicker 11, that is, is formed just
Pole monomer 17.The preparation process of cathode monomer 20 is roughly the same with positive monomer 17, what difference was to coat in cathode monomer 20
For negative electrode slurry.
For the assembling in later period, the diameter of the positive monomer 17 of punching is 0.5mm smaller than cathode monomer 20.
Whole production line unreels guide roller 2 by unwinding unit 1, winds guide roller 12；Rolling unit 13 realizes that anode is single
The continuous production of body 17 and cathode monomer 20.
(5) it assembles:
According to positive 17 → electrolyte of monomer → 18 → electrolyte of diaphragm → 19 → cathode of sealing ring monomer 20 sequence into
Luggage, which is matched, obtains lithium ion button shape cell.
Diaphragm is PE/PP polyolefin film；It is sealed between sealing ring installation and positive and negative anodes monomer；Diaphragm outer diameter compares positive and negative anodes
Monomer is big；Encapsulation is completed on battery sealing machine after battery assembly, obtains lithium ion button shape cell.
Shown in structure combination Fig. 4 and Fig. 5 of obtained lithium ion button shape cell, successively by positive monomer 17, electrolyte, every
Film 18, electrolyte, sealing ring 19 and cathode monomer 20 are assembled, and positive monomer includes positive electrode substrate (stainless steel steel disc)
17.1, the anode sizing agent layer 17.3 that the positive copper coating 17.2 in positive electrode substrate is electroplated and is coated on positive copper coating,
Cathode monomer 20 includes cathode matrix (stainless steel steel disc) 20.1, and the cathode copper coating 20.2 on cathode matrix is electroplated and applies
Negative electrode slurry layer 20.3 of the cloth on cathode copper coating.
Embodiment 2
The preparation process of lithium ion button shape cell, as shown in connection with fig. 1, comprising steps of
(1) clean steel band: steel band 14 is by unwinding unit 1 and unreels guide roller 2 and is delivered to alkaline bath 3 and rinsing bowl 4, by steel
Greasy dirt, the dust that 14 surface of steel band is removed in the alkali wash water for being immersed in alkaline bath 3 with 14 carry out washing to steel band 14 after alkali cleaning
Except alkali cleaning Liquid Residue, heated-air drying processing is carried out into drying unit 5；
Steel band 14 use stainless steel material, steel band 14 with a thickness of 20um；Alkali wash water is 20% ethyl alcohol+5%NaOH+75%
Distilled water；Washing, which is adopted, to be washed with distilled water, and heated-air drying is infra-red drying.
(2) electro-coppering: after drying, copper plated steel band is formed in steel strip surface copper facing into copper facing unit 6；
Electrolyte used in electro-coppering is 0.5mol/L CuSO4+0.5mol/L H2SO4+ distilled water；Electro-coppering it is straight
The current density in galvanic electricity source 7 is 5A/dm2。
(3) slurry is coated with: after the completion of copper facing, into coater unit 8, anode sizing agent being coated on copper facing steel strip surface and is formed
Negative electrode slurry is coated on copper facing steel strip surface and forms negative electrode tab by positive plate, the positive plate after the pole piece baking baking of unit 9 is dry
Surface forms positive coating, and negative electrode tab surface forms cathode coating；
The active material of anode sizing agent is LiMn2O4, and negative electrode active material is graphene, and slurry is using intaglio plate coating or scrapes
Cutter painting cloth realizes painting process by applicator roll, and as shown in connection with fig. 2, the surface of applicator roll 81 is equipped with multiple round reticulate patterns 81.1,
Multiple circle reticulate patterns 81.1 arrange on the surface of applicator roll 81 in array, and the diameter of round reticulate pattern 81.1 is 20mm, and adjacent two
8mm is divided between a circle reticulate pattern；After drying, positive coating and cathode coating with a thickness of 50um.
(4) roll-in and punching: using roll squeezer 10 to the negative electrode tab and positive plate progress roller process after coating process, so
It is punched out processing using bicker 11 afterwards, obtains circular positive monomer 17 and circular cathode monomer 20；
The preparation process that positive monomer 17 is further illustrated in conjunction with Fig. 3, is to plate one layer of anode on 14 surface of steel band first
Then copper coating 17.2 coats multiple circular anode sizing agent layers 17.3 on positive 17.2 surface of copper coating using applicator roll, more
A anode sizing agent layer 17.3 is arranged in array on steel band, is finally punched into multiple round pole pieces by bicker 11, that is, is formed just
Pole monomer 17.The preparation process of cathode monomer 20 is roughly the same with positive monomer 17, what difference was to coat in cathode monomer 20
For negative electrode slurry.
For the assembling in later period, the diameter of the positive monomer 17 of punching is 1.0mm smaller than cathode monomer 20.
Whole production line unreels guide roller 2 by unwinding unit 1, winds guide roller 12；Rolling unit 13 realizes that anode is single
The continuous production of body 17 and cathode monomer 20.
(5) it assembles:
According to positive 17 → electrolyte of monomer → 18 → electrolyte of diaphragm → 19 → cathode of sealing ring monomer 20 sequence into
Luggage, which is matched, obtains lithium ion button shape cell.
Diaphragm is ceramic diaphragm；It is sealed between sealing ring installation and positive and negative anodes monomer；Diaphragm outer diameter is than positive and negative anodes monomer
Greatly；Encapsulation is completed on battery sealing machine after battery assembly, obtains lithium ion button shape cell.
Embodiment 3
The preparation process of lithium ion button shape cell, as shown in connection with fig. 1, comprising steps of
(1) clean steel band: steel band 14 is by unwinding unit 1 and unreels guide roller 2 and is delivered to alkaline bath 3 and rinsing bowl 4, by steel
Greasy dirt, the dust that 14 surface of steel band is removed in the alkali wash water for being immersed in alkaline bath 3 with 14 carry out washing to steel band 14 after alkali cleaning
Except alkali cleaning Liquid Residue, heated-air drying processing is carried out into drying unit 5；
Steel band 14 use stainless steel material, steel band 14 with a thickness of 30um；Alkali wash water is 10% ethyl alcohol+2%NaOH+88%
Distilled water；Washing, which is adopted, to be washed with distilled water, and heated-air drying is infra-red drying.
(2) electro-coppering: after drying, copper plated steel band is formed in steel strip surface copper facing into copper facing unit 6；
Electrolyte used in electro-coppering is 0.2mol/L CuSO4+0.2mol/L H2SO4+ distilled water；Electro-coppering it is straight
The current density in galvanic electricity source 7 is 10A/dm2。
(3) slurry is coated with: after the completion of copper facing, into coater unit 8, anode sizing agent being coated on copper facing steel strip surface and is formed
Negative electrode slurry is coated on copper facing steel strip surface and forms negative electrode tab by positive plate, the positive plate after the pole piece baking baking of unit 9 is dry
Surface forms positive coating, and negative electrode tab surface forms cathode coating；
The active material of anode sizing agent is nickel cobalt lithium aluminate, and negative electrode active material is silicon-carbon, slurry using intaglio plate coating or
Blade coating realizes painting process by applicator roll, and as shown in connection with fig. 2, the surface of applicator roll 81 is equipped with multiple round reticulate patterns
81.1, multiple circle reticulate patterns 81.1 arrange on the surface of applicator roll 81 in array, and the diameter of round reticulate pattern 81.1 is 35mm, phase
10mm is divided between adjacent two round reticulate patterns；After drying, positive coating and cathode coating with a thickness of 100um.
(4) roll-in and punching: using roll squeezer 10 to the negative electrode tab and positive plate progress roller process after coating process, so
It is punched out processing using bicker 11 afterwards, obtains circular positive monomer 17 and circular cathode monomer 20；
The preparation process that positive monomer 17 is further illustrated in conjunction with Fig. 3, is to plate one layer of anode on 14 surface of steel band first
Then copper coating 17.2 coats multiple circular anode sizing agent layers 17.3 on positive 17.2 surface of copper coating using applicator roll, more
A anode sizing agent layer 17.3 is arranged in array on steel band, is finally punched into multiple round pole pieces by bicker 11, that is, is formed just
Pole monomer 17.The preparation process of cathode monomer 20 is roughly the same with positive monomer 17, what difference was to coat in cathode monomer 20
For negative electrode slurry.
For the assembling in later period, the diameter of the positive monomer 17 of punching is 1.5mm smaller than cathode monomer 20.
Whole production line unreels guide roller 2 by unwinding unit 1, winds guide roller 12；Rolling unit 13 realizes that anode is single
The continuous production of body 17 and cathode monomer 20.
(5) it assembles:
According to positive 17 → electrolyte of monomer → 18 → electrolyte of diaphragm → 19 → cathode of sealing ring monomer 20 sequence into
Luggage, which is matched, obtains lithium ion button shape cell.
Diaphragm is ceramic diaphragm；It is sealed between sealing ring installation and positive and negative anodes monomer；Diaphragm outer diameter is than positive and negative anodes monomer
Greatly；Encapsulation is completed on battery sealing machine after battery assembly, obtains lithium ion button shape cell.
Comparative example:
Comparative example is using CR2032 button cell made from identical positive and negative electrode grout material, and anode sizing agent is coated on thickness
Degree is in the aluminum foil current collector of 16um, and negative electrode slurry is coated in 10um copper foil current collector.The button cell is by anode cover, anode
Piece, diaphragm, gasket, negative electrode tab, negative electrode casing composition, according to anode cover → positive plate → electrolyte → diaphragm → electrolyte → cathode
Piece → gasket → negative electrode casing sequence is assembled.
Table 1 is that lithium ion button shape cell and comparative example discharge capacity for the first time and different multiplying is made in the embodiment of the present invention
Discharge capacitance data.
1 button cell specific discharge capacity of table and high rate performance data
As it can be seen from table 1 the specific discharge capacity and high rate performance of the lithium ion button shape cell that the present invention obtains are superior to
Traditional CR2032 button cell.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (7)
1. a kind of preparation process of lithium ion button shape cell, which is characterized in that comprising steps of
(1) it cleans steel band: steel band being immersed in greasy dirt, the dust for removing steel strip surface in alkali wash water, steel band is carried out after alkali cleaning
Washing removal alkali cleaning Liquid Residue, heated-air drying；
(2) electro-coppering: it is once purged, in steel strip surface copper facing, form copper plated steel band；
(3) slurry is coated with: anode sizing agent being coated on copper facing steel strip surface and forms positive plate, negative electrode slurry is coated on copper plated steel
Belt surface forms negative electrode tab, and positive plate surface forms positive coating after baking is dry, and negative electrode tab surface forms cathode coating；
(4) roll-in and punching: to after coating process negative electrode tab and positive plate carry out roll-in, punching handle, obtain it is circular just
Pole monomer and circular cathode monomer；
(5) it assembles:
It is assembled to obtain lithium according to positive monomer → electrolyte → diaphragm → electrolyte → sealing ring → cathode monomer sequence
Ion button cell.
2. the preparation process of lithium ion button shape cell according to claim 1, which is characterized in that step (2) plating
In copper step, electrolyte used in electro-coppering is 0.2~0.5mol/L CuSO4+ 0.2~0.5mol/L H2SO4+ distilled water；
The corresponding current density of the electro-coppering is 5~10A/dm2。
3. the preparation process of lithium ion button shape cell according to claim 1, which is characterized in that step (3) slurry
In coating, the active material of anode sizing agent is cobalt acid lithium, LiMn2O4, LiFePO4, nickle cobalt lithium manganate, one in nickel cobalt lithium aluminate
Kind, the active material of negative electrode slurry is one of graphite, graphene, lithium titanate, tinbase, silicon-carbon cathode material.
4. the preparation process of lithium ion button shape cell according to claim 1, which is characterized in that step (3) slurry
In coating, positive coating and cathode coating with a thickness of 20~100um.
5. the preparation process of lithium ion button shape cell according to claim 1, which is characterized in that step (3) slurry
In coating, painting process is realized by applicator roll, the surface of the applicator roll is equipped with multiple round reticulate patterns, and multiple circle reticulate patterns exist
The surface of applicator roll is arranged in array, and the diameter of the circle reticulate pattern is 10~35mm, the interval of two neighboring circle reticulate pattern
For 5~10mm.
6. a kind of lithium ion button shape cell, which is characterized in that successively by positive monomer (17), electrolyte, diaphragm (18), electrolysis
Liquid, sealing ring (19) and cathode monomer (20) are assembled, and the anode monomer includes positive electrode substrate (17.1), plating in anode
Positive copper coating (17.2) on matrix and the anode sizing agent layer (17.3) being coated on positive copper coating, the cathode monomer
(20) include cathode matrix (20.1), the cathode copper coating (20.2) on cathode matrix is electroplated and is coated on cathode copper coating
On negative electrode slurry layer (20.3).
7. the preparation process of lithium ion button shape cell according to claim 6, which is characterized in that the positive electrode substrate
(17.1) and cathode matrix (20.1) is stainless steel steel disc, steel disc with a thickness of 10~30um.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114361378A (en) * | 2021-12-14 | 2022-04-15 | 宁德厦钨新能源材料有限公司 | Electrochemical performance detection method of ternary material |
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| JPS5657255A (en) * | 1979-10-16 | 1981-05-19 | Toshiba Corp | Sealed alkaline battery |
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Application publication date: 20191025 |