CN105185986A - High-capacity cylindrical 18650 lithium-ion battery and preparation method thereof - Google Patents
High-capacity cylindrical 18650 lithium-ion battery and preparation method thereof Download PDFInfo
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- CN105185986A CN105185986A CN201510497193.0A CN201510497193A CN105185986A CN 105185986 A CN105185986 A CN 105185986A CN 201510497193 A CN201510497193 A CN 201510497193A CN 105185986 A CN105185986 A CN 105185986A
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
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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
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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
- H01M10/058—Construction or manufacture
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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
- 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
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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
- 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
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
- H01M4/623—Binders being polymers fluorinated polymers
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
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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
- 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
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- 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
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- 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
Abstract
The invention discloses a high-capacity cylindrical 18650 lithium-ion battery. Nickel-cobalt lithium aluminate is adopted as a positive active material; SuperP is adopted as a conductive agent; polyvinylidene fluoride (PVDF) is adopted as an adhesive; an aluminum foil is adopted as a positive current collector; graphite is adopted as a negative active material; the SuperP is adopted as the conductive agent; carboxyl methyl cellulose (CMC) is adopted as a thickening agent; butadiene styrene rubber (SBR) is adopted as the adhesive; and a copper foil is adopted as a negative current collector. The used positive material nickel-cobalt lithium aluminate has the advantages of high specific capacity, low cost, abundant raw material resource, good safety, environmental friendliness and the like; the used negative material graphite has the characteristics of high specific capacity, good cycle performance, low cost and the like; the high-capacity cylindrical 18650 lithium-ion battery prepared from the nickel-cobalt lithium aluminate and the graphite has the advantages that the capacity reaches 3100mAh; the cycle performance is good; and the capacity retention ratio is greater than 80% after 300 cycles at 0.5 C/0.5C.
Description
Technical field
The present invention relates to a kind of high power capacity column type 18650 lithium ion battery and preparation method thereof, particularly relate to preparation method and the chemical property of nickel cobalt lithium aluminate-graphite lithium ion battery.
Background technology
Lithium ion battery makes it be widely used in each electronic applications because it has the features such as high voltage, high power capacity, fail safe are good, environmental friendliness.Lithium ion battery is of a great variety, have rectangular cell, aluminum-shell battery, soft-package battery, cylindrical battery, have and lay particular stress on capacity type, has and lays particular stress on rate.Wherein 18650 cylindrical batteries of capacity type are fixed because it has size, capacity high is extensively mainly used in the fields such as portable power source, notebook computer, electric bicycle, electric automobile.Current capacity type cylindrical battery is on the market based on capacity such as 2000mAh, 2200mAh.But along with the development in each field, the performance requirement of battery is also constantly increased, especially require higher to the energy density of battery.Traditional more difficult requirement meeting high-energy-density of lithium ion battery being positive electrode with cobalt acid lithium, LiMn2O4, LiFePO4, nickel manganese cobalt acid lithium.Especially along with the development in electric automobile field, need the battery of high-energy-density to meet the long distance travelled number of electric automobile.Therefore be necessary to find a kind of suitable positive electrode, the battery that capacity of preparing is higher.
Summary of the invention
The object of the invention is to the above problem overcoming prior art existence, column type 18650 lithium ion battery providing a kind of high power capacity and preparation method thereof, it has the advantages that cost is low, capacity is high, cycle performance is excellent.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of high power capacity column type 18650 lithium ion battery, positive active material adopts nickel cobalt lithium aluminate, and conductive agent adopts SuperP, and bonding agent adopts
poly-inclined fluorine alkene(PVDF), plus plate current-collecting body adopts aluminium foil; Negative electrode active material adopts graphite, and conductive agent adopts SuperP, thickener to adopt sodium carboxymethylcellulose (CMC) and bonding agent to adopt butadiene-styrene rubber (SBR), and negative current collector adopts Copper Foil.
Preferably, described positive active material adopts the nickel cobalt lithium aluminate material of height ratio capacity.
Preferably, described negative electrode active material adopts the composite artificial graphite material of height ratio capacity.
Preferably, described plus plate current-collecting body employing thickness is the aluminum foil material of 13-15 μm.
Preferably, described negative current collector employing thickness is the copper foil material of 6-8 μm.
Preferably, barrier film adopts PP/PE/PP tri-layers of micropore ceramics barrier film.
Preferably, block adopts the explosion-proof cap containing PTC and CID.
Further, electrolyte is for being dissolved in the lithium hexafluoro phosphate (LiPF6) of ethylene carbonate (EC) and propene carbonate (PC) dimethyl carbonate (DMC) mixed solution.
A preparation method for high power capacity column type 18650 lithium ion battery, comprises the following steps:
(1) slurry is prepared: prepared by anode sizing agent, be nickel cobalt lithium aluminate 96-98.5%, conductive agent 0.5-1.5%, bonding agent 1-3% in mass ratio, be that material is prepared into solid content at 68%-75% with the 10-30Hz that revolves round the sun, rotation 15-45Hz by solvent in planet dispersion de-airing mixer with 1-METHYLPYRROLIDONE, viscosity is at the slurry of 2000-5000mPa.s; Prepared by cathode size, be graphite 95-97%, conductive agent 0-0.5%, thickener 1-3%, bonding agent 1-3% in mass ratio, be that material is prepared into solid content at 52%-58% with the 10-30Hz that revolves round the sun, rotation 15-45Hz by solvent in planet dispersion de-airing mixer with deionized water, viscosity is at the slurry of 1500-4500mPa.s;
(2) be coated with: use interval type coating machine anode sizing agent to be applied to thickness on 13-15 μm of aluminium foil, it is on the Copper Foil of 6-8 μm that cathode size is applied to thickness, makes surface density and is respectively 47-49mg/cm
2and 25-26mg/cm
2positive/negative plate, oven cooking cycle temperature is: 90-120 DEG C, and walking speed is 4-6m/min;
(3) film-making: will to be coated with and the roll-in on roll squeezer of dried pole piece obtains the positive/negative plate that ganoid thickness is 148-153 μm and 153-160 μm; Again pole piece good for roll-in is cut into sheet in interstitial site, and use slitting knife itemize to make the pole piece that both positive and negative polarity width is 57mm and 59mm, lug that pole piece is burn-on, stick high temperature gummed tape 90-100 DEG C of dry 4h in vacuum drying chamber;
(4) assemble: be that ceramic diaphragm, the positive/negative plate of 12-16 μm is wound into core by thickness on up-coiler pole piece is less than the environment of 30% in relative humidity under, through outward appearance and short-circuit test qualified after, the box hat of diameter 18 ± 0.2mm, height 68 ± 0.5 is put into lower insulating trip, upper insulating trip, by invert direct-current point-welding device, negative lug and box hat are weldingly connected, through slot rolling, survey short circuit, burn-on containing after the explosion-proof cap of PTC and CID, in vacuum oven, toast 48 ± 10h under 80 ± 10 DEG C of conditions;
(5) fluid injection: by baked battery core in the fluid injection room of humidity≤1%, inject 5.2 ± 0.5g electrolyte, after being rolled well by block, in sealing machine, diameter≤18.3 are made in sealing, the standard battery cell of highly≤65.3, cleans up and coats antirust oil and shelve 36-72h under normal temperature;
(6) forming and capacity dividing: the battery core after fluid injection being shelved carries out changing into activated batteries with low current charge on forming and capacity dividing detecting box, and use the electric current of 1550mA to carry out partial volume, filter out the qualified battery of capacity with 20mAh mono-grade;
(7) aging: the qualified battery of screening to be sticked adhesive sticker face pad, puts PVC sleeve pipe, under normal temperature, shelves 7 days, then test voltage internal resistance, filter out voltage >=3.85V, the battery of internal resistance≤60m Ω.
The invention has the beneficial effects as follows:
1, anode material nickel cobalt lithium aluminate used in the present invention has that specific capacity is high, cost is low, raw material resources are abundant, fail safe is good and advantages of environment protection.
2, negative material graphite used in the present invention has the features such as specific capacity is high, good cycle, cost are low.
3, high power capacity column type 18650 lithium ion battery be made up of nickel cobalt lithium aluminate-graphite, have capacity and reach 3100mAh, cycle performance is excellent, and 0.5C/0.5C circulation 300 weeks rear capability retentions are more than 80%.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the discharge curve of the present invention's made high power capacity column type 18650 lithium ion battery under 0.2C, 0.5C, 1C, 2C discharge-rate.
Fig. 2 is the cyclic curve figure of the present invention's made high power capacity column type 18650 lithium ion battery under 0.5C discharge-rate.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
A kind of high power capacity column type 18650 lithium ion battery, positive active material adopts the nickel cobalt lithium aluminate of high power capacity ratio, and conductive agent adopts SuperP, and bonding agent adopts
poly-inclined fluorine alkene(PVDF), plus plate current-collecting body adopts the aluminium foil of 13-15 μm; Negative electrode active material adopts the composite artificial graphite of height ratio capacity, and conductive agent adopts SuperP, thickener to adopt sodium carboxymethylcellulose (CMC) and bonding agent to adopt butadiene-styrene rubber (SBR), and negative current collector adopts 6-8 μm of Copper Foil.Barrier film adopts PP/PE/PP tri-layers of micropore ceramics barrier film, and block adopts the explosion-proof cap containing PTC and CID, and electrolyte is for being dissolved in the lithium hexafluoro phosphate (LiPF6) of ethylene carbonate (EC) and propene carbonate (PC) dimethyl carbonate (DMC) mixed solution.
With reference to shown in Fig. 1, Fig. 2, a kind of preparation of high power capacity column type 18650 lithium ion battery and test:
(1) slurry is prepared: prepared by anode sizing agent: be nickel cobalt lithium aluminate 96-98.5%, conductive agent 0.5-1.5%, bonding agent 1-3% in mass ratio, with 1-METHYLPYRROLIDONE (NMP) for material is prepared into solid content at 68%-75% with the 10-30Hz that revolves round the sun, rotation 15-45Hz by solvent in planet dispersion de-airing mixer, viscosity is at the slurry of 2000-5000mPa.s.Prepared by cathode size: be graphite 95-97%, conductive agent 0-0.5%, thickener 1-3%, bonding agent 1-3% in mass ratio, be that material is prepared into solid content at 52%-58% with the 10-30Hz that revolves round the sun, rotation 15-45Hz by solvent in planet dispersion de-airing mixer with deionized water, viscosity is at the slurry of 1500-4500mPa.s.
(2) be coated with: use interval type coating machine anode sizing agent to be applied to thickness on 13-15 μm of aluminium foil, it is on the Copper Foil of 6-8 μm that cathode size is applied to thickness, makes surface density and is respectively 47-49mg/cm
2and 25-26mg/cm
2positive/negative plate.Oven cooking cycle temperature is: 90-120 DEG C, and walking speed is 4-6m/min.
(3) film-making: will to be coated with and the roll-in on roll squeezer of dried pole piece obtains the positive/negative plate that ganoid thickness is 148-153 μm and 153-160 μm; Again pole piece good for roll-in is cut into sheet in interstitial site, and use slitting knife itemize to make the pole piece that both positive and negative polarity width is 57mm and 59mm, lug that pole piece is burn-on, stick high temperature gummed tape 90-100 DEG C of dry 4h in vacuum drying chamber.
(4) assemble: be that ceramic diaphragm, the positive/negative plate of 12-16 μm is wound into core by thickness on up-coiler pole piece is less than the environment of 30% in relative humidity under, through outward appearance and short-circuit test qualified after, the box hat of diameter 18 ± 0.2mm, height 68 ± 0.5 is put into lower insulating trip, upper insulating trip, by invert direct-current point-welding device, negative lug and box hat are weldingly connected, through slot rolling, survey short circuit, burn-on containing after the explosion-proof cap of PTC and CID, in vacuum oven, toast 48 ± 10h under 80 ± 10 DEG C of conditions.
(5) fluid injection: by baked battery core in the fluid injection room of humidity≤1%, inject 5.2 ± 0.5g electrolyte, after being rolled well by block, in sealing machine, diameter≤18.3 are made in sealing, the standard battery cell of highly≤65.3, cleans up and coats antirust oil and shelve 36-72h under normal temperature.
(6) forming and capacity dividing: the battery core after fluid injection being shelved carries out changing into activated batteries with low current charge on forming and capacity dividing detecting box, and use the electric current of 1550mA to carry out partial volume, filter out the qualified battery of capacity with 20mAh mono-grade.
Its technological parameter is as follows:
(7) aging: the qualified battery of screening to be sticked adhesive sticker face pad, puts PVC sleeve pipe, under normal temperature, shelves 7 days, then test voltage internal resistance, filter out voltage >=3.85V, the battery of internal resistance≤60m Ω.
(8) high rate performance test: battery core is carried out 0.2C and charged to 4.2V, adopts 0.2C, 0.5C, 1C, 2C to be discharged to 2.75V respectively, checks that it is relative to discharge capacitance during 0.2C.
(9) cycle performance test: use 0.5C to charge to 4.2V, be discharged to 2.75V with 0.5C respectively, with this charge and discharge system circulation 300 weeks, check its circulate 300 weeks after the conservation rate of capacity relative when discharge capacity first.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. high power capacity column type 18650 lithium ion battery, is characterized in that: positive active material adopts nickel cobalt lithium aluminate, and conductive agent adopts SuperP, and bonding agent adopts
poly-inclined fluorine alkene, plus plate current-collecting body adopts aluminium foil; Negative electrode active material adopts graphite, and conductive agent adopts SuperP, thickener to adopt sodium carboxymethylcellulose and bonding agent to adopt butadiene-styrene rubber, and negative current collector adopts Copper Foil.
2. high power capacity column type 18650 lithium ion battery according to claim 1, is characterized in that: described positive active material adopts the nickel cobalt lithium aluminate material of height ratio capacity.
3. high power capacity column type 18650 lithium ion battery according to claim 1, is characterized in that: described negative electrode active material adopts the composite artificial graphite material of height ratio capacity.
4. high power capacity column type 18650 lithium ion battery according to claim 1, is characterized in that: described plus plate current-collecting body employing thickness is the aluminum foil material of 13-15 μm.
5. high power capacity column type 18650 lithium ion battery according to claim 1, is characterized in that: described negative current collector employing thickness is the copper foil material of 6-8 μm.
6. high power capacity column type 18650 lithium ion battery according to claim 1, is characterized in that: barrier film adopts PP/PE/PP tri-layers of micropore ceramics barrier film.
7. high power capacity column type 18650 lithium ion battery according to claim 1, is characterized in that: block adopts the explosion-proof cap containing PTC and CID.
8. high power capacity column type 18650 lithium ion battery according to claim 1, is characterized in that: electrolyte is the lithium hexafluoro phosphate being dissolved in ethylene carbonate and propene carbonate, dimethyl carbonate mixed solution.
9. a preparation method for high power capacity column type 18650 lithium ion battery, is characterized in that, comprise the following steps:
(1) slurry is prepared: prepared by anode sizing agent, be nickel cobalt lithium aluminate 96-98.5%, conductive agent 0.5-1.5%, bonding agent 1-3% in mass ratio, be that material is prepared into solid content at 68%-75% with the 10-30Hz that revolves round the sun, rotation 15-45Hz by solvent in planet dispersion de-airing mixer with 1-METHYLPYRROLIDONE, viscosity is at the slurry of 2000-5000mPa.s; Prepared by cathode size, be graphite 95-97%, conductive agent 0-0.5%, thickener 1-3%, bonding agent 1-3% in mass ratio, be that material is prepared into solid content at 52%-58% with the 10-30Hz that revolves round the sun, rotation 15-45Hz by solvent in planet dispersion de-airing mixer with deionized water, viscosity is at the slurry of 1500-4500mPa.s;
(2) be coated with: use interval type coating machine anode sizing agent to be applied to thickness on 13-15 μm of aluminium foil, it is on the Copper Foil of 6-8 μm that cathode size is applied to thickness, makes surface density and is respectively 47-49mg/cm
2and 25-26mg/cm
2positive/negative plate, oven cooking cycle temperature is: 90-120 DEG C, and walking speed is 4-6m/min;
(3) film-making: will to be coated with and the roll-in on roll squeezer of dried pole piece obtains the positive/negative plate that ganoid thickness is 148-153 μm and 153-160 μm; Again pole piece good for roll-in is cut into sheet in interstitial site, and use slitting knife itemize to make the pole piece that both positive and negative polarity width is 57mm and 59mm, lug that pole piece is burn-on, stick high temperature gummed tape 90-100 DEG C of dry 4h in vacuum drying chamber;
(4) assemble: be that ceramic diaphragm, the positive/negative plate of 12-16 μm is wound into core by thickness on up-coiler pole piece is less than the environment of 30% in relative humidity under, through outward appearance and short-circuit test qualified after, the box hat of diameter 18 ± 0.2mm, height 68 ± 0.5 is put into lower insulating trip, upper insulating trip, by invert direct-current point-welding device, negative lug and box hat are weldingly connected, through slot rolling, survey short circuit, burn-on containing after the explosion-proof cap of PTC and CID, in vacuum oven, toast 48 ± 10h under 80 ± 10 DEG C of conditions;
(5) fluid injection: by baked battery core in the fluid injection room of humidity≤1%, inject 5.2 ± 0.5g electrolyte, after being rolled well by block, in sealing machine, diameter≤18.3 are made in sealing, the standard battery cell of highly≤65.3, cleans up and coats antirust oil and shelve 36-72h under normal temperature;
(6) forming and capacity dividing: the battery core after fluid injection being shelved carries out changing into activated batteries with low current charge on forming and capacity dividing detecting box, and use the electric current of 1550mA to carry out partial volume, filter out the qualified battery of capacity with 20mAh mono-grade;
(7) aging: the qualified battery of screening to be sticked adhesive sticker face pad, puts PVC sleeve pipe, under normal temperature, shelves 7 days, then test voltage internal resistance, filter out voltage >=3.85V, the battery of internal resistance≤60m Ω.
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| CN107492654A (en) * | 2017-07-03 | 2017-12-19 | 河南比得力高新能源科技有限公司 | A kind of column lithium ion battery and its preparation technology |
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| CN107768596A (en) * | 2017-10-25 | 2018-03-06 | 苏州英诺达自动化科技有限公司 | Lithium battery production technology high in machining efficiency |
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| CN108054425A (en) * | 2017-12-09 | 2018-05-18 | 珠海聚碳复合材料有限公司 | A kind of preparation method of new high magnification ternary nickel cobalt aluminum electrokinetic cell |
| CN108258236A (en) * | 2018-01-15 | 2018-07-06 | 江西省汇亿新能源有限公司 | A kind of 18650 cylindrical lithium battery of height ratio capacity high circulation service life and preparation method thereof |
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| CN109975381A (en) * | 2019-02-28 | 2019-07-05 | 江苏中兴派能电池有限公司 | A kind of method of quick evaluation and test lithium ion battery plus-negative plate material electrochemical performance |
| CN110459765A (en) * | 2019-08-21 | 2019-11-15 | 深圳睿蚁科技有限公司 | A kind of cylindrical high-rate battery |
| EP4148821A4 (en) * | 2020-06-23 | 2023-08-16 | Contemporary Amperex Technology Co., Limited | Secondary battery and device comprising said secondary battery |
| CN111900336A (en) * | 2020-08-05 | 2020-11-06 | 华中科技大学 | Method for optimizing production logistics system of lithium ion power battery |
| CN112133911A (en) * | 2020-10-09 | 2020-12-25 | 浙江锋锂新能源科技有限公司 | Lithium ion battery cathode slurry and preparation method thereof |
| CN112397791A (en) * | 2020-11-26 | 2021-02-23 | 天能帅福得能源股份有限公司 | Based on TiO2/MoS2Lithium ion battery with negative electrode material and preparation method thereof |
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