CN1305166C - Nano-lithium ion cell and mfg. method thereof - Google Patents
Nano-lithium ion cell and mfg. method thereof Download PDFInfo
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- CN1305166C CN1305166C CNB200510087299XA CN200510087299A CN1305166C CN 1305166 C CN1305166 C CN 1305166C CN B200510087299X A CNB200510087299X A CN B200510087299XA CN 200510087299 A CN200510087299 A CN 200510087299A CN 1305166 C CN1305166 C CN 1305166C
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 89
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000011889 copper foil Substances 0.000 claims abstract description 40
- -1 aluminum compound Chemical class 0.000 claims abstract description 32
- 239000002002 slurry Substances 0.000 claims abstract description 30
- 239000003792 electrolyte Substances 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 239000007772 electrode material Substances 0.000 claims abstract description 10
- 239000011888 foil Substances 0.000 claims abstract description 9
- 239000012528 membrane Substances 0.000 claims abstract description 9
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 claims description 86
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 45
- 239000002033 PVDF binder Substances 0.000 claims description 44
- 239000000203 mixture Substances 0.000 claims description 38
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 36
- 239000005030 aluminium foil Substances 0.000 claims description 34
- 238000003756 stirring Methods 0.000 claims description 24
- 239000003575 carbonaceous material Substances 0.000 claims description 22
- 239000003960 organic solvent Substances 0.000 claims description 22
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 21
- 229910052744 lithium Inorganic materials 0.000 claims description 21
- 239000002253 acid Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 229910002012 Aerosil® Inorganic materials 0.000 claims description 8
- 229910017052 cobalt Inorganic materials 0.000 claims description 8
- 239000010941 cobalt Substances 0.000 claims description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 8
- 239000000284 extract Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 8
- 230000004888 barrier function Effects 0.000 claims description 7
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 7
- 239000011267 electrode slurry Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000003292 glue Substances 0.000 claims 1
- 238000004513 sizing Methods 0.000 claims 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000007781 pre-processing Methods 0.000 abstract 2
- 239000000969 carrier Substances 0.000 abstract 1
- 238000005538 encapsulation Methods 0.000 abstract 1
- 239000007773 negative electrode material Substances 0.000 abstract 1
- 229960002380 dibutyl phthalate Drugs 0.000 description 19
- 239000000047 product Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 7
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 5
- 229920002521 macromolecule Polymers 0.000 description 5
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000003446 memory effect Effects 0.000 description 3
- 238000003808 methanol extraction Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- FOWDZVNRQHPXDO-UHFFFAOYSA-N propyl hydrogen carbonate Chemical compound CCCOC(O)=O FOWDZVNRQHPXDO-UHFFFAOYSA-N 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000012982 microporous membrane Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0472—Vertically superposed cells with vertically disposed plates
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of 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
- H01M4/661—Metal or alloys, e.g. alloy coatings
-
- 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
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/72—Grids
- H01M4/74—Meshes or woven material; Expanded metal
-
- 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
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- Engineering & Computer Science (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The present invention discloses a production method of a nanometer lithium ion battery, which comprises: positive material slurry, negative material slurry and diaphragm material slurry are prepared, and preprocessing material slurry for copper foil and aluminum foil is prepared; the positive material slurry, the negative material slurry, and the diaphragm material slurry are respectively coated on carriers; the copper foil material and the aluminum foil material are respectively punched for forming and are preprocessed with preprocessing materials; the electrode materials are punched for forming; the diaphragm material is cut into a certain shape; the copper foil and the negative electrode material, and the aluminum foil and the positive material are stuck together with a hot composite machine; the positive electrode, the negative electrode and the membrane are rolled and compounded into a battery unit; the electrodes of an external circuit of a battery are welded with the aluminum foil, and the electrodes of the external circuit of the battery are welded with the copper foil; the welded battery is put in an extraction liquid for extraction and coated with an aluminum compound film; an electrolyte is filled in the battery; the performance of the battery is detected; a product is prepared by vacuum encapsulation. The method of the present invention has the advantages of simple process, high finished product rate, little equipment investment, low production cost, etc.
Description
Technical field
What the present invention relates to is a kind of nano-lithium ion cell, the invention still further relates to a kind of production method of nano-lithium ion cell.
Background technology
In the lithium ion battery production technology comparative maturity, more advanced be the battery manufacturing technology of the BYD of the SONY of U.S. BELLCORE, Japan and SANYO company and China.Safety problem, large current charge and discharge are two insoluble key issues that exist during lithium ion battery is produced, in addition the complexity of production technology, production cost is higher also is puzzlement battery Influence Factors of Development.
Summary of the invention
At the shortcoming that above-mentioned prior art exists, the long-pending experience of being engaged in this area work for many years of the inventor through feasibility study repeatedly, gets generation of the present invention eventually; The invention provides a kind of fail safe better, can carry out high current charge-discharge, nano-lithium ion cell that cost of manufacture is lower and preparation method thereof.
The technical solution used in the present invention is: a kind of nano-lithium ion cell, battery is formed and is comprised positive pole, negative pole, membrane layer and electrolyte, positive pole is made up of the positive electrode on metal electrode and the metal electrode, negative pole is made up of the negative material on metal electrode and the metal electrode, and the composition of positive electrode is counted by the quality percentage composition: cobalt acid lithium (LiCoO
2) 70-95%, conductive carbon material 1-6%, polyvinylidene fluoride (PVDF) 2-15%, polyhexafluoropropylene (PHFP) 0.5-4%, dibutyl phthalate (DBP) 1.5-8%; The negative material composition is counted nanoscale metatitanic acid lithium (Li by the quality percentage composition
4Ti
5O
12) 70-90%, conductive carbon material 1-5%, polyvinylidene fluoride (PVDF) 2-18%, polyhexafluoropropylene (PHFP) 0.5-5%, dibutyl phthalate (DBP) 6.5-12%; The composition of diaphragm material is counted polyvinylidene fluoride (PVDF) 25-50%, polyhexafluoropropylene (PHFP) 5-10%, nanoscale aerosil 5-14%, dibutyl phthalate (DBP) 36-60% by the quality percentage composition; Electrolyte consist of ethylene carbonate (EC), dimethyl carbonate (DMC), ethyl-methyl carbonic acid (EMC).
Mass ratio best in the described electrolyte is ethylene carbonate (EC): dimethyl carbonate (DMC): ethyl-methyl carbonic acid (EMC)=1: 1: 1.
Product of the present invention is to make by such method:
Press cobalt acid lithium (LiCoO
2) the quality percentage composition of 70-95%, conductive carbon material 1-6%, polyvinylidene fluoride (PVDF) 2-15%, polyhexafluoropropylene (PHFP) 0.5-4%, dibutyl phthalate (DBP) 1.5-8% mixes, add acetone simultaneously as organic solvent, stir and produce the positive electrode slurry;
Press nanoscale metatitanic acid lithium (Li
4Ti
5O
12) the quality percentage composition of 70-90%, conductive carbon material 1-5%, polyvinylidene fluoride (PVDF) 2-18%, polyhexafluoropropylene (PHFP) 0.5-5%, dibutyl phthalate (DBP) 6.5-12% mixes, add acetone simultaneously as organic solvent, stir and produce the negative material slurry;
The quality percentage composition of pressing polyvinylidene fluoride (PVDF) 25-50%, polyhexafluoropropylene (PHFP) 5-10%, nanoscale aerosil 5-14%, dibutyl phthalate (DBP) 36-60% mixes, add acetone simultaneously as organic solvent, stir and make the diaphragm material slurry;
The quality percentage composition of pressing macromolecule thermosol 70-90%, organic pure 5-20%, conductive carbon material 5-10% mixes, and stirs and makes Copper Foil aluminium foil material previously treated slurry;
Positive electrode slip, negative material slip, diaphragm material slip are coated in respectively on the carrier, make electrode material and diaphragm material; With Copper Foil, aluminum foil material punch forming respectively, carry out the metal electrode preliminary treatment with Copper Foil aluminium foil material previously treated; With the electrode material punch forming and remove carrier, diaphragm material cuts into certain shape; Copper Foil and negative material, aluminium foil and positive electrode are placed in together, utilize thermal composite machine under 130-150 ℃ of temperature, Copper Foil and negative material, aluminium foil and positive electrode to be sticked together; Positive pole, negative pole and barrier film are put together, and hot pressing is combined into battery unit under 110-120 ℃ of temperature;
With ultrasonic spot welder battery external circuit electrode or lead-in wire are welded to one respectively with anodal aluminium foil, the external circuit electrode of battery or the Copper Foil of lead-in wire and negative pole; The battery that welding is good is placed on extraction processing in the methanol extraction liquid; Coat aluminum-plastic composite membrane, electrolyte is filled into inside battery, detect battery performance, Vacuum Package is made product.
Method of the present invention has advantages such as technology is simple, rate of finished products is high, equipment investment is few, production cost is low.
The battery that adopts the inventive method to make is compared with common lithium ion battery, and is more safe and reliable, can carry out high current charge-discharge, specifically sees attached list shown in 1.
Use polyvinylidene fluoride (PVDF), polyhexafluoropropylene (PHFP) and nanoscale silica flour to make the diaphragm material of battery special use in this product, barrier film has good temperature tolerance, effectively prevents internal short-circuit of battery, helps the raising of battery safety.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments nano-lithium ion cell of the present invention and preparation method thereof is described further.
As shown in Figure 1, the technological process of production of nanometer lithium battery of the present invention is: positive electrode and negative material are mixed respectively, carry out quality testing and outward appearance detection after the coating punching press; With copper, the punching press of aluminium grid, copper mesh, aluminium grid material previously treated mix copper mesh, the preliminary treatment of aluminium grid respectively, and pole piece is put, and roll extrusion is combined into the positive and negative electrode pole piece; Diaphragm material is mixed, is coated with, cuts; Carry out the battery unit material requested and put, roll extrusion is combined into battery unit; Carry out short-circuit test, adding nickel strap (battery external circuit electrode), aluminium strip (battery external circuit electrode) are used ultrasonic spot welding, carry out short-circuit test; Extract, dry with baking box then; Prepare the In Aluminium Foil Packing material and strike out the aluminium foil shell, battery is put in the aluminium foil shell; Short-circuit test, perfusion electrolyte are carried out in heat-seal end limit and heat-seal both sides then, and last vacuum heat-seal, battery changes into and discharge gas, carry out last Vacuum Package then and get finished product and dispatch from the factory.
For example the present invention is done more detailed description below:
Embodiment 1:
Press cobalt acid lithium (LiCoO
2) 95%, conductive carbon material 1%, polyvinylidene fluoride (polyvinylidene difluoride; PVDF) 2%, polyhexafluoropropylene (polyhexafluoropropylene; PHFP) 0.5%, dibutyl phthalate (dibutylphthalate; DBP) 1.5% quality percentage composition mixes, and adds acetone simultaneously as organic solvent, stirs and makes the positive electrode slurry; Press nanoscale metatitanic acid lithium (Li
4Ti
5O
12) 90%, the quality percentage composition of conductive carbon material 1%, polyvinylidene fluoride (PVDF) 2%, polyhexafluoropropylene (PHFP) 0.5%, dibutyl phthalate (DBP) 6.5% mixes, add acetone simultaneously as organic solvent, stir and make the negative material slurry; The quality percentage composition of pressing polyvinylidene fluoride (PVDF) 45%, polyhexafluoropropylene (PHFP) 7%, nanoscale aerosil 5%, dibutyl phthalate (DBP) 43% mixes, add acetone simultaneously as organic solvent, stir and make the diaphragm material slurry; Press macromolecule thermosol 70%, organic quality percentage composition pure 20%, conductive carbon material 10% mixes, and adds isopropyl acetone simultaneously as organic solvent, stir and make Copper Foil aluminium foil material previously treated slurry; Positive electrode slip, negative material slip be coated on respectively on the polyester film carrier make active electrode material, and the diaphragm material slip is coated on the microporous membrane carrier and makes diaphragm material; With Copper Foil (copper mesh), the punch forming respectively of aluminium foil (aluminium grid) material, carry out the metal electrode preliminary treatment with Copper Foil aluminium foil material previously treated; With the electrode material punch forming and remove the polyester film carrier, diaphragm material cuts into certain shape; Copper Foil and negative material, aluminium foil and positive electrode are placed in together; Utilize thermal composite machine under 130-150 ℃ of temperature, Copper Foil and negative material, aluminium foil and positive electrode to be sticked together; Positive pole, negative pole and barrier film are put together; Roll extrusion is combined into battery unit under 110-120 ℃ of temperature; With ultrasonic spot welder the external circuit of electrode and anodal aluminium foil, the Copper Foil of negative pole are welded to one respectively; The battery that welding is good is placed on and extracts processing in the extract (methanol solution); Coat aluminum-plastic composite membrane; Electrolyte is filled into inside battery, and the composition of electrolyte is by the mass ratio ethylene carbonate: dimethyl carbonate: the ethyl-methyl carbonic ester is 1: 1: 1; Detect battery performance; Vacuum Package is made product.
Embodiment 2
Press cobalt acid lithium (LiCoO
2) 70%, the quality percentage composition of conductive carbon material 5%, polyvinylidene fluoride (PVDF) 15%, polyhexafluoropropylene (PHFP) 3%, dibutyl phthalate (DBP) 7% mixes, add acetone simultaneously as organic solvent, stir and make the positive electrode slurry, press nanoscale metatitanic acid lithium (Li
4Ti
5O
12) 75%, conductive carbon material 5%, polyvinylidene fluoride (PVDF) 10%, polyhexafluoropropylene (PHFP) 1%, the quality percentage composition of dibutyl phthalate (DBP) 9% mixes, add acetone simultaneously as organic solvent, stir and make the negative material slurry, press polyvinylidene fluoride (PVDF) 25%, polyhexafluoropropylene (PHFP) 7%, nanoscale aerosil 13%, the quality percentage composition of dibutyl phthalate (DBP) 55% mixes, add acetone simultaneously as organic solvent, stir and make the diaphragm material slurry, press macromolecule thermosol 90%, organic pure 5%, the quality percentage composition of conductive carbon material 5% mixes, add isopropyl acetone simultaneously as organic solvent, stir and make Copper Foil aluminium foil material previously treated slurry; Be coated on positive electrode slip, negative material slip, diaphragm material slip on the carrier respectively; With Copper Foil, aluminum foil material punch forming respectively, Copper Foil aluminium foil material previously treated carries out the metal electrode preliminary treatment; With the electrode material punch forming, diaphragm material cuts into certain shape; Copper Foil and negative material, aluminium foil and positive electrode are placed in together; Utilize roller press under 130-150 ℃ of temperature, Copper Foil and negative material, aluminium foil and positive electrode to be sticked together; Positive pole, negative pole and barrier film are put together; Roll extrusion is combined into battery unit under 110-120 ℃ of temperature; With ultrasonic spot welder the external circuit electrode of battery (or lead-in wire) and the aluminium foil of positive pole, the Copper Foil of negative pole are welded to one respectively; The battery that welding is good is placed on and extracts processing in the methanol extraction liquid; Coat aluminum-plastic composite membrane; Electrolyte is filled into inside battery, and the composition of electrolyte is by the mass ratio ethylene carbonate: dimethyl carbonate: the ethyl-methyl carbonic ester is 1: 1: 1; Detect battery performance; Vacuum Package is made product.
Embodiment 3
Press cobalt acid lithium (LiCoO
2) 80%, the quality percentage composition of conductive carbon material 2%, polyvinylidene fluoride (PVDF) 10%, polyhexafluoropropylene (PHFP) 2%, dibutyl phthalate (DBP) 6% mixes, add acetone simultaneously as organic solvent, stir and make the positive electrode slurry, press nanoscale metatitanic acid lithium (Li
4Ti
5O
12) 85%, conductive carbon material 2%, polyvinylidene fluoride (PVDF) 5%, polyhexafluoropropylene (PHFP) 1%, the quality percentage composition of dibutyl phthalate (DBP) 7% mixes, add acetone simultaneously as organic solvent, stir and make the negative material slurry, press polyvinylidene fluoride (PVDF) 50%, polyhexafluoropropylene (PHFP) 8%, nanoscale aerosil 12%, the quality percentage composition of dibutyl phthalate (DBP) 30% mixes, add acetone simultaneously as organic solvent, stir and make the diaphragm material slurry, press macromolecule thermosol 80%, organic pure 13%, the quality percentage composition of conductive carbon material 7% mixes, add isopropyl acetone simultaneously as organic solvent, stir and make Copper Foil aluminium foil material previously treated slurry; Be coated on positive electrode slip, negative material slip, diaphragm material slip on the carrier respectively; With Copper Foil, aluminum foil material punch forming respectively, carry out the metal electrode preliminary treatment with Copper Foil aluminium foil material previously treated; With the electrode material punch forming, diaphragm material cuts into certain shape; Copper Foil and negative material, aluminium foil and positive electrode are placed in together; Utilize roller press under 130-150 ℃ of temperature, Copper Foil and negative material, aluminium foil and positive electrode to be sticked together; Roll extrusion is combined into battery unit under 110-120 ℃ of temperature; Distinguish external circuit electrode (or lead-in wire) and anodal aluminium foil, the Copper Foil of negative pole of battery welded together with ultrasonic spot welder; The battery that welding is good is placed on and extracts processing in the extract (methanol solution); Coat aluminum-plastic composite membrane; Electrolyte is filled into inside battery, and the composition of electrolyte is by the mass ratio ethylene carbonate: dimethyl carbonate: the ethyl-methyl carbonic ester is 1: 0.98: 1.02; Detect battery performance; Vacuum Package is made product.
Embodiment 4
Press cobalt acid lithium (LiCoO
2) 83%, the quality percentage composition of conductive carbon material 6%, polyvinylidene fluoride (PVDF) 7%, polyhexafluoropropylene (PHFP) 2%, dibutyl phthalate (DBP) 2% mixes, add acetone simultaneously as organic solvent, stir and make the positive electrode slurry, press nanoscale metatitanic acid lithium (Li
4Ti
5O
12) 70%, the quality percentage composition of conductive carbon material 3%, polyvinylidene fluoride (PVDF) 16%, polyhexafluoropropylene (PHFP) 5%, dibutyl phthalate (DBP) 6% mixes, add acetone simultaneously as organic solvent, stir and make the negative material slurry; The quality percentage composition of pressing polyvinylidene fluoride (PVDF) 30%, polyhexafluoropropylene (PHFP) 5%, nanoscale aerosil 13%, dibutyl phthalate (DBP) 52% mixes, add acetone simultaneously as organic solvent, stir and make the diaphragm material slurry, mix by (quality percentage composition) macromolecule thermosol 90%, organic quality percentage composition pure 5%, conductive carbon material 5%, add isopropyl acetone simultaneously as organic solvent, stir and make Copper Foil aluminium foil material previously treated slurry; Be coated on positive electrode slip, negative material slip, diaphragm material slip on the carrier respectively; With Copper Foil, aluminum foil material punch forming respectively, Copper Foil aluminium foil material previously treated carries out the metal electrode preliminary treatment; With the electrode material punch forming, diaphragm material cuts into certain shape; Copper Foil and negative material, aluminium foil and positive electrode are placed in together; Utilize roller press under 130-150 ℃ of temperature, Copper Foil and negative material, aluminium foil and positive electrode to be sticked together; Positive pole, negative pole and barrier film are put together; Roll extrusion is combined into battery unit under 110-120 ℃ of temperature; With ultrasonic spot welder the external circuit electrode of battery (or lead-in wire) and the aluminium foil of positive pole, the Copper Foil of negative pole are welded to one respectively; The battery that welding is good is placed on and extracts processing in the methanol extraction liquid; Coat aluminum-plastic composite membrane; Electrolyte is filled into inside battery; Detect battery performance; Vacuum Package is made product.
The present invention has following advantage:
(1) technology simply in slurry manufacturing process, does not need to use the high-temperature vacuum hybrid technology of common lithium battery, only needs to mix at normal temperatures and pressures to get final product, and is simple to operate, low for equipment requirements.In the electrolyte adition process, do not need complicated vacuum impregnating liquid systems, only just passable with common impregnator, simultaneously, the battery that fluid injection is finished does not need long placement, waits for that electrolyte absorption is abundant.Battery can be tested after fluid injection is finished 4 hours.In addition, battery not to the laser beam welding of box hat or aluminum hull, oversimplifies the finished product process when finished product.
(2) cost of manufacture is low
At first, be that material is cheap, lithium titanate is cheap, only is about 1/2 of common lithium battery carbon negative pole material, and simultaneously every square metre of less than of barrier film is 11 yuan, and is more cheap far away than about 24 yuan of common lithium battery.Simultaneously, slurry making apparatus, battery liquid-filling equipment, price is all cheaper, and does not use expensive laser welding apparatus.The expense of equipment and the operating cost of equipment are all lower, and whole cost of manufacture is low.
The performance of common lithium ion battery of table 1 and nano-lithium ion cell relatively
| Specific nature | Nano-lithium ion cell of the present invention | Common lithium ion battery |
| Volume of battery | Can be made into the 0.5mm slimline battery | Thickness can not be less than 2mm |
| Memory effect | Memory effect is very faint | Memory effect is very faint |
| Battery carries out short circuit experiment | Voltage is 0 rapidly, and is undeformed | Battery generates heat, has deformation |
| The battery overcharge experiment | Battery temperature＜60 ℃ | Battery temperature＞90 ℃, on fire |
| Battery operated temperature requirement | -20℃---50℃ | 20℃---50℃ |
| Influence to environment | Environment-friendly battery | Environment there is pollution |
| Whether electrolyte leakage is arranged | The no phenomenon of leakage | To a certain degree exist |
| The cycle life of battery | 700 times---1400 times | 300 times---600 times |
| Self discharge situation (%/moon) | Be not more than 5% | Be not more than 7% |
| Toxicity | Nontoxic | Light poison |
| Collision | No leakage | Leakage |
| Maximum charging current | 3C | 1C |
| Maximum discharge current | 6C | 3C |
Annotate: C is the capacity of battery
For example: the capacity of battery is 650MAh, and the 1C electric current is 0.65A, and the 6C electric current is 3.9A.
Claims (3)
1, a kind of nano-lithium ion cell, it is characterized in that: battery is formed and is comprised positive pole, negative pole, membrane layer and electrolyte, positive pole is made up of the positive electrode on metal electrode and the metal electrode, negative pole is made up of the negative material on metal electrode and the metal electrode, by the quality percentage composition, the consisting of of positive electrode: cobalt acid lithium 70-95%, conductive carbon material 1-6%, polyvinylidene fluoride 2-15%, polyhexafluoropropylene 0.5-4%, dibutyl phthalate 1.5-8%; Negative material consists of: nanoscale metatitanic acid lithium 70-90%, conductive carbon material 1-5%, polyvinylidene fluoride 2-18%, polyhexafluoropropylene 0.5-5%, dibutyl phthalate 6.5-12%; The diaphragm material component is: polyvinylidene fluoride 25-50%, polyhexafluoropropylene 5-10%, nanoscale aerosil 5-14%, dibutyl phthalate 36-60%; Electrolyte is made up of ethylene carbonate, dimethyl carbonate, ethyl-methyl carbonic ester.
2, nano-lithium ion cell as claimed in claim 1 is characterized in that: the composition of described electrolyte is by the mass ratio ethylene carbonate: dimethyl carbonate: the ethyl-methyl carbonic ester is 1: 1: 1.
3, a kind of manufacture method of nano-lithium ion cell is characterized in that:
The quality percentage composition of pressing cobalt acid lithium 70-95%, conductive carbon material 1-6%, polyvinylidene fluoride 2-15%, polyhexafluoropropylene 0.5-4%, dibutyl phthalate 1.5-8% mixes, add acetone simultaneously as organic solvent, stir and make anode sizing agent; The quality percentage composition of pressing nanoscale metatitanic acid lithium 70-90%, conductive carbon material 1-5%, polyvinylidene fluoride 2-18%, polyhexafluoropropylene 0.5-5%, dibutyl phthalate 6.5-12% mixes, add acetone simultaneously as organic solvent, stir and make the negative material slurry; The quality percentage composition of pressing polyvinylidene fluoride 25-50%, polyhexafluoropropylene 5-10%, nanoscale aerosil 5-14%, dibutyl phthalate 36-60% mixes, add acetone simultaneously as organic solvent, stir and make the diaphragm material slurry; The quality percentage composition of pressing hot-fusible high-molecular glue 70-90%, organic pure 5-20%, conductive carbon material 5-10% mixes, and stirs and makes Copper Foil, aluminium foil material previously treated slurry; Positive electrode slurry, negative material slurry, diaphragm material slurry are coated on respectively on the carrier, make electrode material and diaphragm material; With Copper Foil, aluminum foil material punch forming respectively, carry out the metal electrode preliminary treatment with Copper Foil, aluminium foil material previously treated slurry; With the electrode material punch forming and remove carrier, diaphragm material cuts into certain shape; Copper Foil and negative material, aluminium foil and positive electrode are placed in together, utilize thermal composite machine under 130-150 ℃ of temperature, Copper Foil and negative material, aluminium foil and positive pole to be expected to stick together to make negative pole and positive pole respectively; Positive pole, negative pole and barrier film are put together, and roll extrusion is combined into battery unit under 110-120 ℃ of temperature; With ultrasonic spot welder the external circuit electrode of electrode or lead-in wire and anodal aluminium foil, the Copper Foil of negative pole are welded to one respectively; The battery that welding is good is placed on and extracts processing in the methanol solution; Coat aluminum-plastic composite membrane; Electrolyte is filled into inside battery; The test battery performance; Vacuum Package is made product.
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| CN100426568C (en) * | 2006-06-12 | 2008-10-15 | 北京科技大学 | Method of synthesizing lithium ion cathode material lithium titanium oxide using solvent heating method |
| CN101232104B (en) * | 2007-01-22 | 2011-09-14 | 万向集团公司 | Method for manufacturing iron phosphate lithium power polymer lithium ion battery |
| CN101515640B (en) * | 2008-02-22 | 2011-04-20 | 比亚迪股份有限公司 | Cathode and lithium ion secondary battery containing same |
| CN101262062B (en) * | 2008-04-18 | 2010-06-09 | 深圳市崧鼎实业有限公司 | A lithium ion battery cathode material composition, cathode, battery and method |
| CN102024984A (en) * | 2010-11-16 | 2011-04-20 | 成都振中电气有限公司 | Ion battery |
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| JP2002324551A (en) * | 2001-04-27 | 2002-11-08 | Titan Kogyo Kk | Titanic acid lithium powder and its use |
| CN1411091A (en) * | 2001-09-29 | 2003-04-16 | 黑龙江唯友化工实业有限责任公司 | Mobile telephone battery and its manufacturing method |
| CN1476122A (en) * | 2003-07-30 | 2004-02-18 | 黑龙江中强能源科技有限公司 | Polymer lithium ion battery and its manufacturing method |
| CN1622368A (en) * | 2004-12-17 | 2005-06-01 | 清华大学 | Preparation method of spherical Li4Ti5O12 as lithium ion cell cathode material |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002324551A (en) * | 2001-04-27 | 2002-11-08 | Titan Kogyo Kk | Titanic acid lithium powder and its use |
| CN1411091A (en) * | 2001-09-29 | 2003-04-16 | 黑龙江唯友化工实业有限责任公司 | Mobile telephone battery and its manufacturing method |
| CN1476122A (en) * | 2003-07-30 | 2004-02-18 | 黑龙江中强能源科技有限公司 | Polymer lithium ion battery and its manufacturing method |
| CN1622368A (en) * | 2004-12-17 | 2005-06-01 | 清华大学 | Preparation method of spherical Li4Ti5O12 as lithium ion cell cathode material |
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