CN104953190A - Cell winding body shaping method and equipment and high-capacity lithium ion battery and production method thereof - Google Patents
Cell winding body shaping method and equipment and high-capacity lithium ion battery and production method thereof Download PDFInfo
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- CN104953190A CN104953190A CN201510362494.2A CN201510362494A CN104953190A CN 104953190 A CN104953190 A CN 104953190A CN 201510362494 A CN201510362494 A CN 201510362494A CN 104953190 A CN104953190 A CN 104953190A
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- 238000007493 shaping process Methods 0.000 title claims abstract description 58
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 40
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000004804 winding Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims description 30
- -1 polyene nitrile Chemical class 0.000 claims description 25
- 239000011230 binding agent Substances 0.000 claims description 17
- 229910000838 Al alloy Inorganic materials 0.000 claims description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 238000001125 extrusion Methods 0.000 claims description 14
- 229910052744 lithium Inorganic materials 0.000 claims description 14
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 13
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical group [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 13
- 238000007747 plating Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 12
- 239000005030 aluminium foil Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000007667 floating Methods 0.000 claims description 9
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- 159000000002 lithium salts Chemical class 0.000 claims description 6
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- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 6
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 5
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- WDXYVJKNSMILOQ-UHFFFAOYSA-N 1,3,2-dioxathiolane 2-oxide Chemical compound O=S1OCCO1 WDXYVJKNSMILOQ-UHFFFAOYSA-N 0.000 claims description 3
- FSSPGSAQUIYDCN-UHFFFAOYSA-N 1,3-Propane sultone Chemical group O=S1(=O)CCCO1 FSSPGSAQUIYDCN-UHFFFAOYSA-N 0.000 claims description 3
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims description 3
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 claims description 3
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical group O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 3
- 229910010707 LiFePO 4 Inorganic materials 0.000 claims description 3
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- SIXOAUAWLZKQKX-UHFFFAOYSA-N carbonic acid;prop-1-ene Chemical compound CC=C.OC(O)=O SIXOAUAWLZKQKX-UHFFFAOYSA-N 0.000 claims description 3
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005868 electrolysis reaction Methods 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 claims description 3
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 claims description 3
- DEUISMFZZMAAOJ-UHFFFAOYSA-N lithium dihydrogen borate oxalic acid Chemical compound B([O-])(O)O.C(C(=O)O)(=O)O.C(C(=O)O)(=O)O.[Li+] DEUISMFZZMAAOJ-UHFFFAOYSA-N 0.000 claims description 3
- ILXAVRFGLBYNEJ-UHFFFAOYSA-K lithium;manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[O-]P([O-])([O-])=O ILXAVRFGLBYNEJ-UHFFFAOYSA-K 0.000 claims description 3
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- KSHLPUIIJIOBOQ-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[Co++].[Ni++] Chemical compound [O--].[O--].[O--].[O--].[Co++].[Ni++] KSHLPUIIJIOBOQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000005524 ceramic coating Methods 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- ASTZLJPZXLHCSM-UHFFFAOYSA-N dioxido(oxo)silane;manganese(2+) Chemical compound [Mn+2].[O-][Si]([O-])=O ASTZLJPZXLHCSM-UHFFFAOYSA-N 0.000 claims description 2
- AWKHTBXFNVGFRX-UHFFFAOYSA-K iron(2+);manganese(2+);phosphate Chemical compound [Mn+2].[Fe+2].[O-]P([O-])([O-])=O AWKHTBXFNVGFRX-UHFFFAOYSA-K 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
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- 238000003466 welding Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 239000011149 active material Substances 0.000 description 6
- 239000011889 copper foil Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000005441 aurora Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 5
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- 229910052493 LiFePO4 Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000007755 gap coating Methods 0.000 description 3
- 241000237970 Conus <genus> Species 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009831 deintercalation Methods 0.000 description 2
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- 239000002033 PVDF binder Substances 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 230000005518 electrochemistry Effects 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
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- 239000002391 graphite-based active material Substances 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 229910000398 iron phosphate Inorganic materials 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a cell winding body shaping method and equipment and a high-capacity lithium ion battery and a production method thereof. Shaping fixtures with multiple rollers are adopted to roll foil-shaped bodies of the end surfaces of the tab positions of the cell winding body to enable the foil-shaped bodies to be gradually formed in a compressed mode, and finally it is guaranteed that the foil-shaped bodies are flat to meet the length requirement of a cell. The junctions of conical bodies and cylindrical bodies of the rollers have the chamfering function through which it can be guaranteed that the foil-shaped bodies keep the shape of cylindrical bodies of the end surfaces of the tab positions after being shaped, and it can be guaranteed that the end surfaces of the tab positions keep the shape of a hole in the middle of the winding body of which the end surfaces of the tab positions are shaped through ejector pins in the shaping fixtures. Compared with the prior art of a method which adopts a high-frequency oscillation (such as ultrasonic) mode to shape the foil-shaped bodies of the end surfaces of the tab positions of the lithium ion battery, the shaping method and equipment are simple in technology and low in manufacturing and operating cost. The large-capacity lithium ion battery has the advantages that series-parallel connection grouping is easy and efficient.
Description
Technical field
The present invention relates to technical field of electrochemistry, particularly relating to for wind energy and the energy storage of solar energy and the high-capacity cylindrical lithium ion cell technology of power, is a kind of electrical core coiling body shaping methods and equipment, high capacity lithium ion battery and production method thereof specifically.
Background technology
Chemical cell is device chemical energy directly being changed into electric energy.Chemical cell mainly comprises as the electrolyte solution in the housing of encapsulant, housing, the wire being immersed in positive and negative plate in electrolyte solution and dividing plate (film) and connecting electrode or metal connecting sheet.Positive and negative plate and the dividing plate between them (film) are wound on and are called electrical core coiling body together, in chargeable chemical cell, also comprise the circuit board carrying out charging operations further, and above-mentioned electrolyte solution and positive and negative plate etc. are generically and collectively referred to as battery core.Existing lithium ion battery is the one of chemical cell, lithium ion battery is the making active materials for use in secondary electrochemical system device using two kinds of different lithium intercalation compounds that can reversibly embed and deviate from lithium ion as anode and negative pole, during charging, lithium ion is from positive pole deintercalation, through electrolyte and barrier film, be embedded in negative pole.During electric discharge, lithium ion is from negative pole deintercalation, by electrolyte and barrier film, is embedded in positive pole, can circulate repeatedly thus.
Along with wind energy, the fast development of solar energy, its electric energy produced is due to stable not, easily electrical network is produced and impact, therefore corresponding storage station is set up imperative, therefore need high capacity lithium ion battery that reliability is high for accumulation of energy, to store wind energy, the electricity that sun the subject of knowledge and the object of knowledge produces, storage station is very high to the requirement of battery, such as high reliability and long life (more than 10 years) etc., batteries of electric automobile is except high reliability and long life require, battery is also needed to have the ability of high magnification work, high-capacity cylindrical lithium ion cell has high-energy-density, the advantages such as manufacturing process is simple.But technically, high-capacity cylindrical lithium ion cell is due to capacity large (>4Ah ampere-hour), and pole piece is long, is not too applicable to the method manufacture with common low capacity column lithium ion battery.Existing common low capacity column lithium ion battery is (if model is 18650,1.4Ah; 26650,3.3Ah etc.) positive/negative plate manufacture time adopt gap coating, the object of gap coating is to weld strip lug (nickel or aluminium or copper material), if high-capacity cylindrical lithium ion cell also adopts gap to be coated with, then pole coating and roll-in hourly velocity slow, the strip lug number of required welding is many, the welding job amount at strip lug and coating clearance place is large, and need insulating tape be pasted, complex process, efficiency is low, and capacity density is also lowered thus, and therefore high-capacity cylindrical lithium ion cell pole piece is not suitable for adopting gap coating.
Existing high-capacity cylindrical lithium ion cell, the full lug formula positive and negative electrode of many employings.The such as patent No. is that the Chinese patent of CN202178322U discloses " a kind of full lug type drainage battery ", the patent No. is that the Chinese patent of CN202178323U discloses " a kind of full polar lug cylinder battery ", these two kinds of batteries just all have employed full lug formula, negative pole, namely when plus plate current-collecting body (being generally aluminium foil) upper coating anode sizing agent, at one end the region (positive aurora paper tinsel district 10) of a part of not coating sizing-agent is reserved at edge, when negative current collector (being generally Copper Foil) upper coating cathode size, at one end the region (negative pole Guang Bo district 20) of a part of not coating sizing-agent is reserved at edge.After positive plate 1, negative plate 2 and barrier film 3 winding forms electrical core coiling body, the paper tinsel body in positive aurora paper tinsel district 10 forms the lug position end face of positive pole, and the paper tinsel body in negative pole Guang Bo district 20 forms the lug position end face of negative pole, as depicted in figs. 1 and 2.Lug position end face need weld together with collector plate, so that the electric current of battery exports from collector plate.Paper tinsel body thickness due to lug position end face is thin (6 ~ 30 microns), soft yielding, when welding with collector plate, applying pressure can make whole paper tinsel body become curved or distortion, the lug position end face diameter of electrical core coiling body is caused to become large or evagination (as shown in Figure 3), cause electrical core coiling body cannot load battery case or with battery case conducting and short circuit, and directly apply the end face of pressure at paper tinsel body, face deformation out-of-flatness can be caused, the regional area of end face cannot with collector plate contact weld, cause bonding area little, weld strength is low, the internal resistance of cell is large, therefore be necessary to carry out shaping to the lug position end face of electrical core coiling body before collector plate welding.
Existing electrical core coiling body shaping methods, mainly contains following two kinds:
1, the paper tinsel body in positive aurora paper tinsel district and the paper tinsel body in negative pole Guang Bo district are used laser pre-cut beam shapes respectively, after positive plate, negative plate and membrane coil are coiled into electrical core coiling body, the paper tinsel body of these beam shapes is welded on the current collecting plates of a bottle-cover-shape.This shaping methods needs to be cut into strips by paper tinsel body shape with laser, complex process, and efficiency is low, cost is high, and paper tinsel body its bulk strength after shape that cuts into strips is low, is welded on current collecting plates and is easily pulled off, relatively original paper tinsel body, loaded current is little, is to get half the result with twice the effort.
2, the patent No. is CN102683634A, patent name is the patent of invention of " a kind of high-capacity cylindrical lithium ion cell and production method thereof ", the lug position end face of the higher-order of oscillation (such as ultrasonic wave) mode to lithium ion battery is adopted to carry out shaping, the tuner manufacturing cost of the machine that the method adopts is high, useful life is limited, corresponding tuner frequency debugging is complicated, and frequency regulation time is long.
Based on the defect that above-mentioned two kinds of shaping methods exist, be necessary to find that a kind of efficiency is higher, processing is simpler, cost is lower, the electrical core coiling body shaping methods of longer service life and shaping device, and and then improve the production method of high capacity lithium ion battery.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, technical problem to be solved by this invention is to provide the electrical core coiling body shaping methods and shaping device that a kind of efficiency is higher, processing is simpler, cost is lower, and and then the high capacity lithium ion battery production method providing a kind of simple and effective, production cost low.
In order to solve the problems of the technologies described above, the technical solution used in the present invention one is:
Electrical core coiling body shaping methods, carrying out roll extrusion to the paper tinsel body of the lug position end face of electrical core coiling body makes the paper tinsel body of lug position end face be compressed into type, makes the form trait of lug position end face constant while roll extrusion at the hole wall applying pressure of the periphery of lug position end face and centre bore.
In order to solve the problems of the technologies described above, the technical solution used in the present invention two is:
Electrical core coiling body shaping device, comprise: battery core stationary fixture, be symmetricly set on ambilateral two reshaping clamps of battery core geometrical clamp, drive two reshaping clamps in opposite directions or heterodromous first driving mechanism, and drive the second driving mechanism of two reshaping clamp forward or reverse, described reshaping clamp comprises shell, thimble and multiple roller, described shell is large end opening, it is horn-like that small end is closed, the opening of shell is towards battery core stationary fixture, center line on the small end face that described thimble is fixed on shell and along shell extends to opening direction, described multiple roller with the center line of shell for axle is evenly distributed on all sides of thimble, one end of roller is rotated and is arranged on the sidewall of shell, the other end of roller is disposed with cylinder and cone, cylindrical diameter is greater than the bottom diameter of cone, the junction of cylinder and cone is provided with chamfering, the top of cone is towards thimble.
In order to solve the problems of the technologies described above, the technical solution used in the present invention three is:
High capacity lithium ion battery production method, comprises the following steps:
1) electrical core coiling body preparation: positive pole slurrying-anode pole piece is coated with continuously-anode pole piece roll-in-anode pole piece cuts-negative pole slurrying-cathode pole piece is coated with continuously-cathode pole piece roll-in-cathode pole piece cuts-and positive and negative electrode pole piece and membrane winding become electrical core coiling body;
2) the lug position end face shaping of electrical core coiling body: carry out roll extrusion to the paper tinsel body of the lug position end face of electrical core coiling body and make the paper tinsel body of lug position end face be compressed into type, makes the form trait of lug position end face constant at the hole wall applying pressure of the periphery of lug position end face and centre bore while roll extrusion;
3) battery case assembling: collector plate is welded with the paper tinsel body of the lug position end face after shaping, the lug of collector plate and the coiling body of plus or minus pole bottom welding-band collector plate enter shell-battery container and end cap laser welding-vacuumize-injection electrolyte-change into and partial volume-play steel ball to seal liquid injection port.
In order to solve the problems of the technologies described above, the technical solution used in the present invention four is:
High capacity lithium ion battery, comprise battery container, the end cap at the electrical core coiling body be arranged in battery container, the collector plate at gland electrical core coiling body two ends, the pole be connected with collector plate by lug and battery the two poles of the earth, described pole comprises Positive Poles and negative pole pole, described end cap comprises anode end cap and negative pole end cap, and described collector plate comprises anode collection plate and negative pole currect collecting plate;
The material of described Positive Poles is aluminium alloy, and the material of negative pole pole is copper nickel plating, and the material of described anode collection plate is aluminium alloy, and the material of negative pole currect collecting plate is copper nickel plating, and anode collection plate and negative pole currect collecting plate are provided with the inlet opening that electrolysis liquid flows into;
The described positive pole ear of anode collection plate and the Positive Poles of anode end cap are fixed by laser or ultra-sonic welded, and the material of described positive pole ear is aluminium alloy; The negative lug of described negative pole currect collecting plate and the negative pole pole of negative pole end cap are fixed by laser or ultra-sonic welded, and the material of described negative lug is copper nickel plating or pure nickel;
The paper tinsel body of the lug position end face of described electrical core coiling body both positive and negative polarity is reduced 0.1-10 millimeter by compression after difference shaping, and the paper tinsel body of lug position end face tangles mutually.
Beneficial effect of the present invention is: compared with carrying out the method for shaping with the paper tinsel body of the prior art higher-order of oscillation (such as ultrasonic wave) mode to lithium ion cell polar ear position end face, shaping methods of the present invention and shaping device technique are simple, manufacture and operating cost low.High capacity lithium ion battery provided by the invention, has the connection in series-parallel advantage such as simply efficient in groups.
Accompanying drawing explanation
Figure 1 shows that the structural representation one of the electrical core coiling body adopting full lug formula positive and negative electrode.
Figure 2 shows that the structural representation two of the electrical core coiling body adopting full lug formula positive and negative electrode.
Figure 3 shows that the lug position end face of the electrical core coiling body adopting full lug formula positive and negative electrode is by the schematic shapes after collector plate direct weighting.
Figure 4 shows that the design sketch before the Copper Foil body shaping of the lug position end face of electrical core coiling body negative pole.
Figure 5 shows that the Copper Foil body of the lug position end face of electrical core coiling body negative pole adopt shaping methods shaping of the present invention after design sketch.
Figure 6 shows that the design sketch before the aluminium foil body shaping of the lug position end face of electrical core coiling body positive pole.
Figure 7 shows that the aluminium foil body of the lug position end face of electrical core coiling body positive pole adopt shaping methods shaping of the present invention after design sketch.
Figure 8 shows that the structural representation of electrical core coiling body shaping device of the present invention.
Figure 9 shows that the structural representation of the reshaping clamp in Fig. 4.
Figure 10 shows that the structural representation of the roller in Fig. 5.
Figure 11 shows that the structural representation of the thimble in Fig. 5.
Figure 12 shows that the structural representation of high capacity lithium ion battery of the present invention.
Label declaration:
1-positive plate; 2-negative plate; 3-barrier film; 10-positive aurora paper tinsel district; 20-negative pole Guang Bo district; 30-battery core centre bore;
4-battery core stationary fixture; 40-floating holder; 41-stationary fixture; 42-cylinder; 5-reshaping clamp; 50-shell; 51-thimble; 52-roller; 510-conus portion; 511-cylindrical portion; 520-cylinder; 521-cone; 522-chamfering;
1 '-battery container; 2 '-electrical core coiling body; 3 '-anode collection plate; 4 '-negative pole currect collecting plate; 5 '-positive pole ear; 6 '-Positive Poles; 7 '-negative lug; 8 '-negative pole pole; 9 '-anode end cap; 10 '-negative pole end cap; 11 '-slot rolling; 12 '-mandrel; 13 '-steel ball.
Embodiment
By describing technology contents of the present invention in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with execution mode.
The design of most critical of the present invention is: carry out roll extrusion to the paper tinsel body of the lug position end face of electrical core coiling body and make the paper tinsel body of lug position end face be compressed into type, makes the form trait of lug position end face constant while roll extrusion at the hole wall applying pressure of the periphery of lug position end face and centre bore.
Please refer to shown in Fig. 8 to Figure 11, electrical core coiling body shaping device provided by the invention, comprise: battery core stationary fixture 4, be symmetricly set on two reshaping clamps 5 of battery core stationary fixture 4 both sides, drive two reshaping clamps 5 in opposite directions or heterodromous first driving mechanism, and drive the second driving mechanism of two reshaping clamp 5 forward or reverse, described reshaping clamp 5 comprises shell 50, thimble 51 and multiple roller 52, described shell 50 is in large end opening, it is horn-like that small end is closed, the opening of shell 50 is towards battery core stationary fixture 4, center line on the small end face that described thimble 51 is fixed on shell 50 and along shell 50 extends to opening direction, described multiple roller 52 with the center line of shell 50 for axle is evenly distributed on all sides of thimble 51, one end of roller 52 is rotated and is arranged on the sidewall of shell 50, the other end of roller 52 is disposed with cylinder 520 and cone 521, the diameter of cylinder 520 is greater than the bottom diameter of cone 521, cylinder 520 is provided with chamfering 522 with the junction of cone 521, the top of cone 521 is towards thimble 51.
Further, described first driving mechanism comprises the first motor and screw mandrel, described second driving mechanism comprises the second motor, described reshaping clamp 5 is fixed on the second motor, the small end face of shell 50 is coaxially connected with the output shaft of the second motor, described second motor is arranged on screw mandrel, and described first motor drives screw mandrel to rotate to make two reshaping clamps 5 in opposite directions or counter motion.
Further, described battery core stationary fixture 4 comprises floating holder 40 and stationary fixture 41, and described floating holder 40 is connected with cylinder 42, described cylinder 42 drive floating holder 40 near or away from stationary fixture 41 with clamping or unclamp electrical core coiling body.
The course of work of above-mentioned shaping device is specific as follows:
At touch-screen, battery core (i.e. electrical core coiling body is set, as follows) total length, required process and the first motor speed after battery core shaping, the optimum configurations such as the second motor rotary speed, manually battery core is placed on battery core stationary fixture 4, crawl starting switch, first electric motor starting, the reshaping clamp 5 of both sides is driven synchronously to draw close to battery core center line by screw mandrel, automatic centering, then the first motor stop motion, cylinder 42 drives floating holder 40 to clamp battery core, second electric motor starting, the reshaping clamp 5 at two ends is driven to rotate, reshaping clamp 5 surveys transmission by gear or axle, one of them rotates forward, another reversion, first electric motor starting makes the reshaping clamp 5 of both sides synchronously do slow feeding to battery core simultaneously, when the cone 521 of the roller 52 of reshaping clamp 5 touches the paper tinsel body of lug position end face of battery core, produce between the cone 521 of roller 52 and paper tinsel body and rub, friction impels roller 52 to rotate, because the tangent line of the cone 521 of multiple roller 52 is positioned at same plane, paper tinsel body can be ensured smooth when compression forming, until complete the battery core shaping arranging length, wherein the conus portion 510 of thimble 51 is convenient to insert battery core centre bore 30 (battery core centre bore 30 as depicted in figs. 1 and 2), and prevent from causing damage to battery core, its cone angle is 30 °-80 °, the cylindrical portion 511 of thimble 51 inserts battery core centre bore 30, and when the cylinder 520 with roller 52 ensures shaping together, foil can not overflow.
Contrast on effect before and after electrical core coiling body shaping please refer to shown in Fig. 4 to Fig. 7.
From foregoing description, shaping principle of the present invention is:
Carry out roll extrusion with the paper tinsel body of the lug position end face of cone 521 pairs of electrical core coiling bodies of multiple rollers 52 of reshaping clamp 5, paper tinsel body is gradually compressed shaping, and final guarantee is smooth, and reach battery core length requirement, as shown in Figures 4 to 7.The tangent line of the cone 521 of multiple rollers 52 of reshaping clamp 5 is at same plane, first driving mechanism and the second driving mechanism drive two reshaping clamps 5 (positive terminal of the corresponding electrical core coiling body of difference and negative pole end) rotate and synchronously draw close to battery core center line respectively, side rotates forward, reverse in side, when reshaping clamp 5 does slowly near paper tinsel body, produce between the cone 521 of roller 52 and paper tinsel body and rub, friction impels roller 52 to rotate, roller 52 also applies pressure to paper tinsel body, paper tinsel body is compressed, in unit volume, the weight density of paper tinsel body strengthens, greatly increased by the rigidity of compression paper tinsel body, become the platform plane that rigidity is large.The cone 521 of roller 52 has chamfering function with the intersection of cylinder 520, the cylindrical shape of lug position end face is kept after can guaranteeing the shaping of paper tinsel body, 51, thimble in reshaping clamp 5 guarantee lug position end face be shaped after the shape of coiling body middle with hole, the laser welding being shaped as next step lug position end face and collector plate of lug position end face paper tinsel body sets up firm base, the laser welding effective area of lug position end face and collector plate is strengthened and weld strength improves.Reforming process can not cause end face cylindrical diameter in lug position to become large, and what can not affect electrical core coiling body enters shell.
Please refer to shown in Figure 12, high capacity lithium ion battery provided by the invention, is comprised battery container 1 ', is arranged on the interior electrical core coiling body 2 ' of battery container 1 ', the anode collection plate 3 ' at gland electrical core coiling body 2 ' two ends and negative pole currect collecting plate 4 ', the Positive Poles 6 ' be connected with anode collection plate 3 ' by positive pole ear 5 ', the negative pole pole 8 ' be connected with negative pole currect collecting plate 4 ' by negative lug 7 ' and point to be located at anode end cap 9 ' and the negative pole end cap 10 ' at battery the two poles of the earth;
The material of described Positive Poles 6 ' is aluminium alloy, the material of negative pole pole 8 ' is copper nickel plating, the material of described anode collection plate 3 ' is aluminium alloy, and the material of negative pole currect collecting plate 4 ' is copper nickel plating, and anode collection plate 3 ' and negative pole currect collecting plate 4 ' are provided with the inlet opening that electrolysis liquid flows into;
The positive pole ear 5 ' of described anode collection plate 3 ' is fixed by laser or ultra-sonic welded with the Positive Poles 6 ' of anode end cap 9 ', and the material of described positive pole ear 5 ' is aluminium alloy; The negative lug 7 ' of described negative pole currect collecting plate 4 ' is fixed by laser or ultra-sonic welded with the negative pole pole 8 ' of negative pole end cap 10 ', and the material of described negative lug 7 ' is copper nickel plating or pure nickel;
The paper tinsel body of the lug position end face of the both positive and negative polarity of described electrical core coiling body 2 ' is reduced 0.1-10 millimeter by compression after difference shaping, and the paper tinsel body of lug position end face tangles mutually.
Further, described battery container 1 ' is positioned at described positive pole ear 5 ' and is provided with two roller groove structure with the position of negative lug 7 ', and described slot rolling 11 ' was around described cylinder one week.
Meltability Kynoar PFA or polyether-ether-ketone PEEK plastic seal ring is adopted to seal between Positive Poles 6 ' of the present invention and anode end cap 9 ', Kynoar PFA or the direct pouring of polyether-ether-ketone PEEK plastics are on the hole wall of anode end cap 9 ' top and bottom and centre, therefore upper-lower seal circle is real is integrated, negative pole pole 8 ' adopts the mode same with Positive Poles 6 ' to seal, such battery container 1 ' is neutral, battery container 1 ' can not with negative or positive electrode conducting.
The production method of high capacity lithium ion battery provided by the invention, comprises the following steps:
1) electrical core coiling body preparation: positive pole slurrying-anode pole piece is coated with continuously-anode pole piece roll-in-anode pole piece cuts-negative pole slurrying-cathode pole piece is coated with continuously-cathode pole piece roll-in-cathode pole piece cuts-and positive and negative electrode pole piece and membrane winding become electrical core coiling body;
2) the lug position end face shaping of electrical core coiling body: carry out roll extrusion to the paper tinsel body of the lug position end face of electrical core coiling body and make the paper tinsel body of lug position end face be compressed into type, makes the form trait of lug position end face constant at the hole wall applying pressure of the periphery of lug position end face and centre bore while roll extrusion;
3) battery case assembling: collector plate is welded with the paper tinsel body of the lug position end face after shaping, the lug of collector plate and the coiling body of plus or minus pole bottom welding-band collector plate enter shell-battery container and end cap laser welding-vacuumize-injection electrolyte-change into and partial volume-play steel ball to seal liquid injection port.
Further, described anode pole piece comprises positive active material, plus plate current-collecting body and binding agent, described positive active material is LiFePO 4, cobalt acid lithium, LiMn2O4, cobalt nickel oxide manganses lithium, lithium manganese phosphate, iron manganese phosphate for lithium or manganese silicate of lithium, described plus plate current-collecting body is aluminium foil, and described binding agent is polyene nitrile series of binders, Arabic gum, modification polyethylene glycol oxide, Kynoar, styrene butadiene rubber latex or carboxymethyl cellulose; Described cathode pole piece comprises negative electrode active material, negative current collector and binding agent, described negative electrode active material is Delanium, the mixture of native graphite, Delanium and native graphite, carbonaceous mesophase spherules, metallic tin, silicon or lithium titanate, and described binding agent is polyene nitrile series of binders, Arabic gum, modification polyethylene glycol oxide, Kynoar, styrene butadiene rubber latex or carboxymethyl cellulose.
Further, described barrier film is polypropylene, polyethylene, the micro-pore septum of polypropylene three layers of compound, monolayer polyethylene micro-pore septum, polyimide micro-pore diaphragm or polytetrafluoroethylene micro-pore septum, and membrane surface scribbles alumina ceramic coating.
Further, described electrolyte comprises solvent, soluble lithium salt and additive, described solvent is ethylene carbonate, methyl ethyl carbonate, propene carbonate, dimethyl carbonate, diethyl carbonate, methyl propyl carbonate or ethyl acetate, described soluble lithium salt is lithium hexafluoro phosphate, di-oxalate lithium borate or imines lithium salts, and described additive is propane sultone, vinylene carbonate, fluorocarbons acid esters, ethylene sulfite, HMDS or triphenyl phosphite.
Embodiment one
Large Copacity coiled lithium ion battery (model 60280) is as shown in figure 12 in column type, and cell diameter 60 millimeters, height 280 millimeters (being only cylindrical shell long, not containing pole and bolt protruded length), battery capacity is 60 ampere-hours.
Battery container 1 ' and end cap material are aluminium alloy.
As depicted in figs. 1 and 2, lug position end face: be due to positive plate 1, negative plate 2 and barrier film 3 reel time, the paper tinsel body end face of the limit formation of the Copper Foil (negative pole Guang Bo district 20) of the non-coating portion of negative plate 2 or the aluminium foil (positive aurora paper tinsel district 10) of the non-coating portion of positive plate 1, is equal to end face and the bottom surface of electrical core coiling body 2 ' in fact.
As shown in Figs. 8 to 11, the present embodiment two reshaping clamps 5 (have three rollers 52 in reshaping clamp 5, a thimble 51) respectively roll extrusion is carried out to the aluminium foil body of the lug position end face of positive pole and negative pole and Copper Foil body simultaneously and extrude simultaneously, the paper tinsel body of the lug position end face of positive pole and negative pole is respectively by compression reduction 3.0 millimeters, and namely the overall height of electrical core coiling body 2 ' reduces about 6 millimeters.Concrete shaping process process is: arrange battery core total length at touch-screen, required process and the first motor speed after battery core shaping, the optimum configurations such as the second motor rotary speed, manually battery core is placed on battery core stationary fixture 4, crawl starting switch, first electric motor starting, the reshaping clamp 5 of both sides is driven synchronously to draw close to battery core center line by screw mandrel, automatic centering, first motor stop motion, cylinder 42 drives floating holder 40 to clamp battery core, second electric motor starting, first electric motor starting, two ends reshaping clamp 5 is driven to rotate, reshaping clamp 5 surveys transmission by gear or axle, side rotates forward, reverse in side, reshaping clamp 5 does slow feeding simultaneously, (cone 521 of roller 52 has shaping feature to roller 52 in reshaping clamp 5, its cone angle is 0 °-90 °, the chamfering 522 that cylinder 520 is arranged with the junction of cone 521 has chamfering function, and its cone angle is more bigger than cone 521, the cylinder 520 of roller 52 has the function that when preventing fixture shaping, foil overflows) rotation under the friction of the paper tinsel body of battery core end, paper tinsel body can be ensured smooth when compression forming, until complete the battery core shaping arranging length, wherein the conus portion 510 of thimble 51 is convenient to insert battery core centre bore 30, and prevent from causing damage to battery core, its cone angle is 30 °-80 °, the cylindrical portion 511 of thimble 51 inserts battery core centre bore 30, and when the cylinder 520 with roller 52 ensures shaping together, foil can not overflow.
See also shown in Figure 12, the high capacity lithium ion battery of the present embodiment, comprise the positive pole ear 5 ' on battery container 1 ', electrical core coiling body 2 ', anode collection plate 3 ', negative pole currect collecting plate 4 ', anode collection plate 3 ', the negative lug 7 ' on negative pole currect collecting plate 4 ', Positive Poles 6 ', negative pole pole 8 ', anode end cap 9 ' and negative pole end cap 10 ', battery container 1 ' is aluminium alloy.Battery container 1 ' and anode end cap 9 ', negative pole end cap 10 ' uses laser welding in one, Positive Poles 6 ' material is aluminium alloy, negative pole pole 8 ' material is copper nickel plating, anode collection plate 3 ' material is aluminium alloy, negative pole currect collecting plate 4 ' material is copper nickel plating, anode collection plate 3 ' and negative pole currect collecting plate 4 ' are provided with 4 holes, for the inflow of electrolyte, the positive pole ear 5 ' of anode collection plate 3 ' is together with Positive Poles 6 ' laser welding, positive pole ear 5 ' material is aluminium alloy, negative pole currect collecting plate 4 ' and negative lug 7 ' are with one, material is copper nickel plating, this negative lug 7 ' is linked together with negative pole pole 8 ' Laser Welding, the interior electrical core coiling body 2 ' of battery container 1 ' carries out shaping with reshaping clamp 5 of the present invention, the paper tinsel body of lug position end face is compressed reduction 0.1 to 10.0 millimeter, the rigidity of the paper tinsel body of lug position end face increases greatly.Electrical core coiling body 2 ' comprises the positive plate 1 being coated with LiFePO4 active material, the negative plate 2 being coated with graphite active material, material are polyethylene or polyacrylic barrier film 3 and material are the mandrel 12 ' at the coiling body center of polytetrafluoroethylene or polypropylene or aluminium.The Positive Poles 6 ' of battery is provided with liquid injection port, seals after fluid injection completes with steel ball 13 ' to liquid injection port.
The basic technology route of the high capacity lithium ion battery of the present embodiment is:
Positive pole slurrying-anode pole piece is coated with continuously-and anode pole piece roll-in-anode pole piece cuts-negative pole slurrying-cathode pole piece is coated with continuously-cathode pole piece roll-in-cathode pole piece cuts-just, and cathode pole piece and membrane winding become electrical core coiling body-lug position, electrical core coiling body two ends paper tinsel body and are entered shell-battery container and end cap laser welding sealing-vacuumize-injection electrolyte-change into and partial volume-play steel ball to seal by the lug of lug position end face weld collector plate-collector plate after the reshaping clamp shaping-shaping with roller and the coiling body of positive and negative terminals bottom welding-band collector plate.
Described positive pole slurrying is iron phosphate serving as positive active material, and conductive carbon and polyvinylidene fluoride binder (being dissolved in solvent NMP) strong stirring disperse gained jelly, and positive pole jelly is coated on aluminium foil and obtains anode pole piece; Negative pole slurrying is graphite, conductive carbon and sodium carboxymethylcellulose CMC, styrene butadiene rubber latex SBR, polyene nitrile LA132, LA133 series of binders (dissolving in deionized water) strong stirring dispersion gained jelly, negative pole jelly is coated on copper or aluminium foil and obtains cathode pole piece.Described positive plate comprises positive active material, plus plate current-collecting body and binding agent, and described positive active material is LiFePO 4, and described plus plate current-collecting body is aluminium foil, and described binding agent is Kynoar; Described negative plate comprises negative electrode active material, negative current collector and binding agent, and negative electrode active material is mesocarbon.Described binding agent is polyene nitrile LA132, LA133 series; Described barrier film is the micro-pore septum that surface scribbles the polypropylene of nano aluminium oxide ceramic layer, polyethylene, polypropylene three layers of compound.
Described electrolyte comprises solvent, soluble lithium salt and additive, described solvent is ethylene carbonate, methyl ethyl carbonate, propene carbonate, dimethyl carbonate, diethyl carbonate, methyl propyl carbonate or ethyl acetate, described soluble lithium salt is lithium hexafluoro phosphate, di-oxalate lithium borate or imines lithium salts, and described additive is propane sultone, vinylene carbonate, fluorocarbons acid esters, ethylene sulfite, HMDS or triphenyl phosphite.
Embodiment two
On embodiment one basis, only change battery length (shell and electric core winding body length), change 160 millimeters into from 280 millimeters, battery size is 65160, and battery capacity is 30 ampere-hours.All the other are constant.
Embodiment three
On embodiment one basis, the positive plate only battery being coated with LiFePO4 active material changes into the positive plate that battery is coated with LiMn2O4 active material, and all the other are constant.
Embodiment four
On embodiment one basis, the positive plate only battery being coated with LiFePO4 active material changes into the positive plate that battery is coated with lithium manganese phosphate active material, and all the other are constant.
Embodiment five
On embodiment one basis, only battery container and end cap material are changed into aluminium alloy or nickel or stainless steel, all the other are constant.
Embodiment six
On embodiment one basis, only battery current collecting plate is changed into copper or copper nickel plating or pure nickel or stainless steel, all the other are constant.
Embodiment seven
On embodiment one basis, only change large for battery lug material into pure nickel, all the other are constant.
Embodiment eight
On embodiment one basis, only Positive Poles and end cap are adopted integral structure.All the other are constant.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing specification of the present invention and accompanying drawing content to do, or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. electrical core coiling body shaping methods, it is characterized in that: roll extrusion is carried out to the paper tinsel body of the lug position end face of electrical core coiling body and makes the paper tinsel body of lug position end face be compressed into type, while roll extrusion, make the form trait of lug position end face constant at the hole wall applying pressure of the periphery of lug position end face and centre bore.
2. electrical core coiling body shaping device, it is characterized in that, comprise: battery core stationary fixture, be symmetricly set on ambilateral two reshaping clamps of battery core geometrical clamp, drive two reshaping clamps in opposite directions or heterodromous first driving mechanism, and drive the second driving mechanism of two reshaping clamp forward or reverse, described reshaping clamp comprises shell, thimble and multiple roller, described shell is large end opening, it is horn-like that small end is closed, the opening of shell is towards battery core stationary fixture, center line on the small end face that described thimble is fixed on shell and along shell extends to opening direction, described multiple roller with the center line of shell for axle is evenly distributed on all sides of thimble, one end of roller is rotated and is arranged on the sidewall of shell, the other end of roller is disposed with cylinder and cone, cylindrical diameter is greater than the bottom diameter of cone, the junction of cylinder and cone is provided with chamfering, the top of cone is towards thimble.
3. electrical core coiling body shaping device according to claim 2, it is characterized in that: described first driving mechanism comprises the first motor and screw mandrel, described second driving mechanism comprises the second motor, described reshaping clamp is fixed on the second motor, the small end face of shell is coaxially connected with the output shaft of the second motor, described second motor is arranged on screw mandrel, and described first motor drives screw mandrel to rotate to make two reshaping clamps in opposite directions or counter motion.
4. electrical core coiling body shaping device according to claim 2, it is characterized in that: described battery core stationary fixture comprises floating holder and stationary fixture, described floating holder is connected with cylinder, described air cylinder driven floating holder near or away from stationary fixture with clamping or unclamp electrical core coiling body.
5. high capacity lithium ion battery production method, is characterized in that, comprises the following steps:
1) electrical core coiling body preparation: positive pole slurrying-anode pole piece is coated with continuously-anode pole piece roll-in-anode pole piece cuts-negative pole slurrying-cathode pole piece is coated with continuously-cathode pole piece roll-in-cathode pole piece cuts-and positive and negative electrode pole piece and membrane winding become electrical core coiling body;
2) the lug position end face shaping of electrical core coiling body: carry out roll extrusion to the paper tinsel body of the lug position end face of electrical core coiling body and make the paper tinsel body of lug position end face be compressed into type, makes the form trait of lug position end face constant at the hole wall applying pressure of the periphery of lug position end face and centre bore while roll extrusion;
3) battery case assembling: collector plate is welded with the paper tinsel body of the lug position end face after shaping, the lug of collector plate and the coiling body of plus or minus pole bottom welding-band collector plate enter shell-battery container and end cap laser welding-vacuumize-injection electrolyte-change into and partial volume-play steel ball to seal liquid injection port.
6. high capacity lithium ion battery production method according to claim 5, it is characterized in that: described anode pole piece comprises positive active material, plus plate current-collecting body and binding agent, described positive active material is LiFePO 4, cobalt acid lithium, LiMn2O4, cobalt nickel oxide manganses lithium, lithium manganese phosphate, iron manganese phosphate for lithium or manganese silicate of lithium, described plus plate current-collecting body is aluminium foil, and described binding agent is polyene nitrile series of binders, Arabic gum, modification polyethylene glycol oxide, Kynoar, styrene butadiene rubber latex or carboxymethyl cellulose; Described cathode pole piece comprises negative electrode active material, negative current collector and binding agent, described negative electrode active material is Delanium, the mixture of native graphite, Delanium and native graphite, carbonaceous mesophase spherules, metallic tin, silicon or lithium titanate, and described binding agent is polyene nitrile series of binders, Arabic gum, modification polyethylene glycol oxide, Kynoar, styrene butadiene rubber latex or carboxymethyl cellulose.
7. high capacity lithium ion battery production method according to claim 5, it is characterized in that: described barrier film is polypropylene, polyethylene, the micro-pore septum of polypropylene three layers of compound, monolayer polyethylene micro-pore septum, polyimide micro-pore diaphragm or polytetrafluoroethylene micro-pore septum, and membrane surface scribbles alumina ceramic coating.
8. high capacity lithium ion battery production method according to claim 5, it is characterized in that, described electrolyte comprises solvent, soluble lithium salt and additive, described solvent is ethylene carbonate, methyl ethyl carbonate, propene carbonate, dimethyl carbonate, diethyl carbonate, methyl propyl carbonate or ethyl acetate, described soluble lithium salt is lithium hexafluoro phosphate, di-oxalate lithium borate or imines lithium salts, and described additive is propane sultone, vinylene carbonate, fluorocarbons acid esters, ethylene sulfite, HMDS or triphenyl phosphite.
9. the high capacity lithium ion battery that the production method according to claim 5 to 8 any one is produced, it is characterized in that: comprise battery container, the end cap at the electrical core coiling body be arranged in battery container, the collector plate at gland electrical core coiling body two ends, the pole be connected with collector plate by lug and battery the two poles of the earth, described pole comprises Positive Poles and negative pole pole, described end cap comprises anode end cap and negative pole end cap, and described collector plate comprises anode collection plate and negative pole currect collecting plate;
The material of described Positive Poles is aluminium alloy, and the material of negative pole pole is copper nickel plating, and the material of described anode collection plate is aluminium alloy, and the material of negative pole currect collecting plate is copper nickel plating, and anode collection plate and negative pole currect collecting plate are provided with the inlet opening that electrolysis liquid flows into;
The described positive pole ear of anode collection plate and the Positive Poles of anode end cap are fixed by laser or ultra-sonic welded, and the material of described positive pole ear is aluminium alloy; The negative lug of described negative pole currect collecting plate and the negative pole pole of negative pole end cap are fixed by laser or ultra-sonic welded, and the material of described negative lug is copper nickel plating or pure nickel;
The paper tinsel body of the lug position end face of described electrical core coiling body both positive and negative polarity is reduced 0.1-10 millimeter by compression after difference shaping, and the paper tinsel body of lug position end face tangles mutually.
10. high capacity lithium ion battery according to claim 9, is characterized in that: the position that described battery container is positioned at described positive pole ear and negative lug is provided with two roller groove structure, and described slot rolling was around described cylinder one week.
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| CN108461822A (en) * | 2018-03-27 | 2018-08-28 | 高帅 | Cylindrical battery core enters shell auxiliary device and package machine automatically |
| CN109860751A (en) * | 2017-11-30 | 2019-06-07 | 银隆新能源股份有限公司 | Winding device for battery reparation |
| CN110854425A (en) * | 2019-11-01 | 2020-02-28 | 广州鹏辉能源科技股份有限公司 | Battery, winding body and current collecting disc |
| CN111009693A (en) * | 2019-11-19 | 2020-04-14 | 江伟 | Internal fine adjustment cylindrical battery cell assembly process |
| CN113036205A (en) * | 2020-12-28 | 2021-06-25 | 上海骄成机电设备有限公司 | Cylindrical battery end face shaping method and system |
| CN113659184A (en) * | 2020-04-29 | 2021-11-16 | 北京小米移动软件有限公司 | Winding type battery cell, battery and electronic equipment |
| CN114094162A (en) * | 2021-07-06 | 2022-02-25 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method and device for manufacturing battery cell |
| CN114421020A (en) * | 2022-01-14 | 2022-04-29 | 无锡易泽赛尔智能装备有限公司 | Flexible tool applicable to cylindrical battery |
| CN114597506A (en) * | 2022-03-16 | 2022-06-07 | 厦门海辰新能源科技有限公司 | Rolling core flattening device and rolling core flattening forming method |
| CN114628772A (en) * | 2020-12-10 | 2022-06-14 | 北京好风光储能技术有限公司 | Winding type battery |
| CN114669631A (en) * | 2022-04-22 | 2022-06-28 | 武汉逸飞激光股份有限公司 | Method for flattening cylindrical battery cell lug |
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| CN108461822A (en) * | 2018-03-27 | 2018-08-28 | 高帅 | Cylindrical battery core enters shell auxiliary device and package machine automatically |
| CN110854425A (en) * | 2019-11-01 | 2020-02-28 | 广州鹏辉能源科技股份有限公司 | Battery, winding body and current collecting disc |
| CN111009693A (en) * | 2019-11-19 | 2020-04-14 | 江伟 | Internal fine adjustment cylindrical battery cell assembly process |
| CN111009693B (en) * | 2019-11-19 | 2021-09-17 | 南京中比新能源科技有限公司 | Internal fine adjustment cylindrical battery cell assembly process |
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| CN113036205A (en) * | 2020-12-28 | 2021-06-25 | 上海骄成机电设备有限公司 | Cylindrical battery end face shaping method and system |
| CN114094162A (en) * | 2021-07-06 | 2022-02-25 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method and device for manufacturing battery cell |
| CN114122486A (en) * | 2021-07-06 | 2022-03-01 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method and device for manufacturing battery cell |
| CN114122635A (en) * | 2021-07-06 | 2022-03-01 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric device, and method and device for manufacturing battery cell |
| CN114122486B (en) * | 2021-07-06 | 2024-06-07 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric equipment and manufacturing method and equipment of battery cell |
| CN114094162B (en) * | 2021-07-06 | 2024-06-07 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric equipment and manufacturing method and equipment of battery cell |
| CN114122635B (en) * | 2021-07-06 | 2024-06-07 | 江苏时代新能源科技有限公司 | Battery cell, battery, electric equipment and manufacturing method and equipment of battery cell |
| CN114421020A (en) * | 2022-01-14 | 2022-04-29 | 无锡易泽赛尔智能装备有限公司 | Flexible tool applicable to cylindrical battery |
| CN114421020B (en) * | 2022-01-14 | 2023-12-29 | 无锡易泽智装工业技术有限公司 | Flexible tool applicable to cylindrical battery |
| CN114597506B (en) * | 2022-03-16 | 2023-04-07 | 厦门海辰储能科技股份有限公司 | Rolling core flattening device and rolling core flattening forming method |
| CN114597506A (en) * | 2022-03-16 | 2022-06-07 | 厦门海辰新能源科技有限公司 | Rolling core flattening device and rolling core flattening forming method |
| CN114669631A (en) * | 2022-04-22 | 2022-06-28 | 武汉逸飞激光股份有限公司 | Method for flattening cylindrical battery cell lug |
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