CN106058303A - 18650 lithium ion battery and preparation method thereof - Google Patents
18650 lithium ion battery and preparation method thereof Download PDFInfo
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- CN106058303A CN106058303A CN201610607120.7A CN201610607120A CN106058303A CN 106058303 A CN106058303 A CN 106058303A CN 201610607120 A CN201610607120 A CN 201610607120A CN 106058303 A CN106058303 A CN 106058303A
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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
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of 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
- H01M4/139—Processes of manufacture
- H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- 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
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- 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
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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
- H01M4/625—Carbon or graphite
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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 18650 lithium ion battery. The 18650 lithium ion battery comprises a positive plate, a negative plate, a diaphragm, an electrolyte, a steel shell and a cover cap, wherein the positive plate is prepared from the following components in percentages by weight: 38.2 percent to 57.3 percent of nickel cobalt lithium aluminate, 38.2 percent to 57.3 percent of lithium manganate, 0.5 percent to 1 percent of graphene, 1 percent to 1.5 percent of Ketjen Black and 1 percent to 2 percent of polyvinylidene fluoride. The invention also provides a composition and a preparation method of the negative plate and a preparation method of the lithium ion battery. The lithium ion battery provided by the invention has the advantages of high safety performance, large volume energy, large power and good cycle performance.
Description
Technical field
The present invention relates to field of batteries, be specifically related to 18650 lithium ion batteries and preparation method thereof.
Background technology
Along with the development of mobile electronic device, the demand of battery is increasing, capacity, voltage and the use longevity to battery
Life is proposed higher requirement.Lithium ion battery is a kind of secondary cell (rechargeable battery), and it relies primarily on lithium ion just
Move work between pole and negative pole.But lithium ion battery on the market to there is the poor safety performance of battery core, capacity low, single
Volume capacity is low, power is low and the multiple shortcoming of cycle performance difference in position.
Next to that the processing characteristics of existing 18650 lithium ion batteries is unstable；The humidity of production environment is wanted by ternary material
Ask high, water suction disposed slurry retrogradation easily occurs, cause coated face density unstable, consequently leads to various problems, such as the product produced
Product qualification rate is less than 90%, and the poor safety performance of product, acupuncture is not essentially by, after the poor heat stability internal short-circuit of battery
Easily thermal diffusion, on fire from explosion, cycle performance 1C8C charge and discharge is less than 300 weeks, and power-performance low battery discharge platform is low for 3.6V,
The shortcomings such as volumetric power density is low.
Summary of the invention
In order to overcome the deficiencies in the prior art, first purpose of the present invention is to provide a kind of 18650 lithium ion batteries,
18650 lithium ion batteries provided by the present invention have that security performance is high, volume energy is big, power is big, good cycle and
Acupuncture percent of pass feature very.
Second object of the present invention is to provide for positive plate, negative plate and lithium ion battery in a kind of above-mentioned battery
Preparation method.
Realize the purpose of the present invention to reach by adopting the following technical scheme that:
A kind of 18650 lithium ion batteries, including positive plate, negative plate, barrier film, electrolyte, box hat, block, described positive pole
Sheet includes following component the most in parts by weight:
Preferably, described negative plate includes following component the most in parts by weight:
Preferably, the gram volume of described graphite is 350-355mAh/g.
Preferably, described positive plate is prepared from by the following method:
(1) each component is added in double-planet beater, autobiography speed be 48 turns/min, public pass speed be 1700 turns/
Stir 2h under conditions of min and make slurry；
(2) employing high speed dispersor is under conditions of rotating speed is 3500～4500 turns/min, the slurry that dispersion steps (1) obtains
Material, reaches 7000～9000mPa.s to viscosity；
(3) step (2) obtained slurry is coated on the aluminium foil of 14～16 μ m-thick according to the surface density of 170～200g/,
Positive plate is made in drying；
(4) according to active matter 3.3～3.5g/mm3Compacted density carry out rolling and make closely knit positive plate；
(5) being cut by positive plate is 57～58mm wide positive plates.
Preferably, step (3) is dried the positive plate made to positive plate water content less than or equal to 0.15%.
Preferably, described negative plate is prepared from by the following method:
(1) each component is joined in double-planet beater, autobiography speed be 48 turns/min, the public speed that passes be 1500
Turn/min under conditions of stir 2h make slurry；
(2) employing high speed dispersor is under conditions of rotating speed is 3000～4000 turns/min, dispersion steps (1) obtained slurry
Material, reaches 5000～7000mPa.s to slurry viscosity；
(3) it is coated according to the surface density of 81～95g/ on the Copper Foil of 9～10 μ m-thick, dries and make negative plate；
(4) according to active matter 1.4～1.6g/mm3Compacted density carry out rolling and make closely knit negative plate；
(5) being cut by negative plate is 58.5～59.5mm wide negative plates.
Preferably, step (3) is dried the negative plate made to negative plate water content less than or equal to 0.15%.
Present invention also offers the preparation method of a kind of 18650 lithium ion batteries, comprise the steps:
(1) positive plate, negative plate are arranged on automatic winding-machine the most as requested, use barrier film isolation positive plate
And negative plate, the aluminium strip anode ear of positive plate welding simultaneously, negative plate welding nickel strap negative electrode lug is wound, and makes core；Described
Barrier film is ceramic diaphragm；
(2) core is inserted in tool, put into vacuum oven, by being evacuated to-85～-95MPa, at 75～95 DEG C
Constant temperature and pressure toasts, and nitrogen charging to air pressure is-35～-45MPa afterwards；Evacuation, baking, inflated with nitrogen circulation are implemented 14～18 little
Time, water content≤200PPM to core；
(3) core is installed in box hat, welding negative electrode lug and box hat, inserts PIN steel pipe, install pad, slot rolling, survey
Examination is short-circuit, injection 5.5～5.9g electrolyte, welding anode ear and block, then block and box hat fasten sealing formation battery core；Clearly
Clear battery core outer surface；
(4) battery core is placed on after activating 30～40 hours in the environment of temperature is 35～45 DEG C, is installed on formation cabinet
It is melted into；By battery core first in the environment of temperature 35～45 DEG C aging five days, then battery core is carried out voltage internal resistance screening, sieve
Select battery core partial volume list charging voltage in the battery core of 3.6～3.9V, then be placed in the environment of temperature 35～45 DEG C aging five days, make lithium
Ion battery.
Preferably, step (1) described ceramic diaphragm is prepared from by the two-sided each coating alpha-crystal form aluminium sesquioxide of PE base material.
Preferably, the operations in step (3) ambient temperature be 20-25 DEG C, in the environment of dew point-38 DEG C complete
Become.
Compared to existing technology, the beneficial effects of the present invention is:
1, the present invention uses nickel cobalt lithium aluminate, LiMn2O4, Graphene, Ketjen black, Kynoar to make positive plate, uses
Graphite, conductive black, sodium carboxymethyl cellulose, butadiene-styrene rubber make negative plate, make battery core provided by the present invention have acupuncture
Percent of pass is high, security performance is high, the advantage of good cycle.
2, by the positive plate provided in the present invention, the preparation method of negative plate and the system of 18650 lithium ion batteries
Preparation Method, the water content making positive plate provided by the present invention, negative plate and core is low, does not easily cause battery short circuit, makes this
It is long that 18650 lithium ion batteries that invention is provided have service life, uses safe advantage.
Detailed description of the invention
Below, in conjunction with detailed description of the invention, the present invention is described further:
Embodiment 1:
A kind of 18650 based lithium-ion battery positive plates, described positive plate includes following component the most in parts by weight:
Described positive plate is prepared from by the following method:
(1) each component is added in double-planet beater, autobiography speed be 48 turns/min, public pass speed be 1700 turns/
Stir 2h under conditions of min and make slurry；
(2) the high speed dispersor slurry that dispersion steps (1) obtains under the conditions of rotating speed is 3500 turns/min is used, to viscosity
Reach 7000mPa.s；
(3) step (2) obtained slurry is coated on the aluminium foil of 14 μ m-thick according to the surface density of 170g/, dries to just
Pole piece water content makes positive plate less than or equal to 0.15%；
(4) according to active matter 3.3g/mm3Compacted density carry out rolling and make closely knit positive plate；
(5) positive plate is cut as positive plate wide for 57mm.
Embodiment 2:
A kind of 18650 based lithium-ion battery positive plates, described positive plate includes following component the most in parts by weight:
Described positive plate is prepared from by the following method:
(1) each component is added in double-planet beater, autobiography speed be 48 turns/min, public pass speed be 1700 turns/
Stir 2h under conditions of min and make slurry；
(2) the high speed dispersor slurry that dispersion steps (1) obtains under the conditions of rotating speed is 4500 turns/min is used, to viscosity
Reach 9000mPa.s；
(3) step (2) obtained slurry is coated on the aluminium foil of 16 μ m-thick according to the surface density of 200g/, dries to just
Pole piece water content makes positive plate less than or equal to 0.15%；
(4) according to active matter 3.5g/mm3Compacted density carry out rolling and make closely knit positive plate；
(5) positive plate is cut as positive plate wide for 58mm.
Embodiment 3:
A kind of 18650 based lithium-ion battery positive plates, described positive plate includes following component the most in parts by weight:
Described positive plate is prepared from by the following method:
(1) each component is added in double-planet beater, autobiography speed be 48 turns/min, public pass speed be 1700 turns/
Stir 2h under conditions of min and make slurry；
(2) the high speed dispersor slurry that dispersion steps (1) obtains under the conditions of rotating speed is 4000 turns/min is used, to viscosity
Reach 8000mPa.s；
(3) step (2) obtained slurry is coated on the aluminium foil of 15 μ m-thick according to the surface density of 190g/, dries to just
Pole piece water content makes positive plate less than or equal to 0.15%；
(4) according to active matter 3.4g/mm3Compacted density carry out rolling and make closely knit positive plate；
(5) positive plate is cut as positive plate wide for 57.5mm.
Embodiment 4:
A kind of 18650 based lithium-ion battery positive plates, described positive plate includes following component the most in parts by weight:
Described positive plate is prepared from by the following method:
(1) each component is added in double-planet beater, autobiography speed be 48 turns/min, public pass speed be 1700 turns/
Stir 2h under conditions of min and make slurry；
(2) the high speed dispersor slurry that dispersion steps (1) obtains under the conditions of rotating speed is 4500 turns/min is used, to viscosity
Reach 7000mPa.s；
(3) step (2) obtained slurry is coated on the aluminium foil of 14 μ m-thick according to the surface density of 200g/, dries to just
Pole piece water content makes positive plate less than or equal to 0.15%；
(4) according to active matter 3.5g/mm3Compacted density carry out rolling and make closely knit positive plate；
(5) positive plate is cut as positive plate wide for 58mm.
Embodiment 5
A kind of 18650 based lithium-ion battery positive plates include following component the most in parts by weight:
Described positive plate is prepared from by the following method:
(1) each component is added in double-planet beater, rotational velocity be 40 turns/min revolution speed be 1400 turns/
Stir 1h under conditions of min and make slurry；
(2) under the conditions of rotating speed is 4000 turns/min, the slurry that dispersion steps (1) obtains is carried out, extremely with high speed dispersor again
Viscosity reaches 5000mPa.s；
(3) step (2) obtained slurry is coated on the aluminium foil of 10 μ m-thick according to the surface density of 200g/, dries to containing
The water yield≤0.2% makes positive plate；
(4) according to active matter 2.5g/mm3Compacted density carry out rolling and make closely knit positive plate；
(5) positive plate is cut as positive plate wide for 60.5mm.
Embodiment 6:
A kind of 18650 anode plate for lithium ionic cell, described negative plate includes following component the most in parts by weight:
The gram volume of described graphite is 350mAh/g.
Described negative plate is prepared from by the following method:
(1) each component is joined in double-planet beater, autobiography speed be 48 turns/min, the public speed that passes be 1500
Turn/min under conditions of stir 2h make slurry；
(2) using high speed dispersor under conditions of rotating speed is 3000 turns/min, dispersion steps (1) obtained slurry, to slurry
Material viscosity reaches 5000mPa.s；
(3) being coated according to the surface density of 81g/ on the Copper Foil of 9 μ m-thick, drying to negative plate water content is less than or equal to
0.15%, make negative plate；
(4) according to active matter 1.4g/mm3Compacted density carry out rolling and make closely knit negative plate；
(5) negative plate is cut as negative plate wide for 58.5mm.
Embodiment 7:
A kind of 18650 anode plate for lithium ionic cell, described negative plate includes following component the most in parts by weight:
The gram volume of described graphite is 355mAh/g.
Described negative plate is prepared from by the following method:
(1) each component is joined in double-planet beater, autobiography speed be 48 turns/min, the public speed that passes be 1500
Turn/min under conditions of stir 2h make slurry；
(2) using high speed dispersor under conditions of rotating speed is 4000 turns/min, dispersion steps (1) obtained slurry, to slurry
Material viscosity reaches 7000mPa.s；
(3) being coated according to the surface density of 95g/ on the Copper Foil of 10 μ m-thick, drying to negative plate water content is less than or equal to
0.15%, make negative plate；
(4) according to active matter 1.6g/mm3Compacted density carry out rolling and make closely knit negative plate；
(5) negative plate is cut as negative plate wide for 59.5mm.
Embodiment 8:
A kind of 18650 anode plate for lithium ionic cell, described negative plate includes following component the most in parts by weight:
The gram volume of described graphite is 353mAh/g.
Described negative plate is prepared from by the following method:
(1) each component is joined in double-planet beater, autobiography speed be 48 turns/min, the public speed that passes be 1500
Turn/min under conditions of stir 2h make slurry；
(2) using high speed dispersor under conditions of rotating speed is 3500 turns/min, dispersion steps (1) obtained slurry, to slurry
Material viscosity reaches 6000mPa.s；
(3) being coated according to the surface density of 88g/ on the Copper Foil of 9.5 μ m-thick, drying to negative plate water content is less than or equal to
0.15%, make negative plate；
(4) according to active matter 1.5g/mm3Compacted density carry out rolling and make closely knit negative plate；
(5) negative plate is cut as negative plate wide for 59mm.
Embodiment 9
A kind of 18650 anode plate for lithium ionic cell, described negative plate includes following component the most in parts by weight:
Described negative plate is prepared from by the following method:
(1) each component is joined in double-planet beater, rotational velocity be 40 turns/min revolution speed be 1200 turns/
Stir 1h under conditions of min and make slurry；
(2) again with high speed dispersor under conditions of rotating speed is 2000 turns/min, carry out being dispersed to slurry viscosity and reach
4500mPa.s；
(3) being coated according to the surface density of 70g/ on the Copper Foil of 13 μ m-thick, negative pole is made in drying to moisture≤0.25%
Sheet；
(4) according to active matter 1.35g/mm3Compacted density carry out rolling and make closely knit negative plate；
(5) negative plate is cut as negative plate wide for 63mm.
Embodiment 10
The preparation method of a kind of 18650 lithium ion batteries, comprises the steps:
(1) positive plate, negative plate are arranged on automatic winding-machine the most as requested, use barrier film isolation positive plate
And negative plate, the aluminium strip anode ear of positive plate welding simultaneously, negative plate welding nickel strap negative electrode lug is wound, and makes core；Described
Barrier film is ceramic diaphragm；Ceramic diaphragm is prepared from by the two-sided each coating alpha-crystal form aluminium sesquioxide of PE base material；
(2) core is inserted in tool, put into vacuum oven, by being evacuated to-90MPa, at the constant temperature and pressure of 85 DEG C
Baking, nitrogen charging to air pressure is-40MPa afterwards；Evacuation, baking, inflated with nitrogen circulation are implemented 16 hours, water content to core
≤200PPM；
(3) core is installed in box hat, welding negative electrode lug and box hat, inserts PIN steel pipe, install pad, slot rolling, survey
Examination is short-circuit, injection 5.7g electrolyte, welding anode ear and block, then block and box hat fasten sealing formation battery core；Clear electricity
Core outer surface；In this step, operations is 23 DEG C in ambient temperature, completes in the environment of dew point-38 DEG C.
(4) battery core is placed on after activating 35 hours in the environment of temperature is 40 DEG C, is installed on formation cabinet be melted into；
By battery core first in the environment of temperature 40 DEG C aging five days, then battery core is carried out voltage internal resistance screening, screens battery core partial volume list
Charging voltage, in the battery core of 3.6～3.9V, then in the environment of being placed on temperature 40 DEG C aging five days, makes lithium ion battery.
Embodiment 11
The preparation method of a kind of 18650 lithium ion batteries, comprises the steps:
(1) positive plate, negative plate are arranged on automatic winding-machine the most as requested, use barrier film isolation positive plate
And negative plate, the aluminium strip anode ear of positive plate welding simultaneously, negative plate welding nickel strap negative electrode lug is wound, and makes core；Described
Barrier film is ceramic diaphragm；Ceramic diaphragm is prepared from by the two-sided each coating alpha-crystal form aluminium sesquioxide of PE base material；
(2) core is inserted in tool, put into vacuum oven, by being evacuated to-85MPa, at the constant temperature and pressure of 75 DEG C
Baking, nitrogen charging to air pressure is-35MPa afterwards；Evacuation, baking, inflated with nitrogen circulation are implemented 14 hours, water content to core
≤200PPM；
(3) core is installed in box hat, welding negative electrode lug and box hat, inserts PIN steel pipe, install pad, slot rolling, survey
Examination is short-circuit, injection 5.5g electrolyte, welding anode ear and block, then block and box hat fasten sealing formation battery core；Clear electricity
Core outer surface；In this step, operations is 20 DEG C in ambient temperature, completes in the environment of dew point-38 DEG C.
(4) battery core is placed on after activating 30 hours in the environment of temperature is 35 DEG C, is installed on formation cabinet be melted into；
By battery core first in the environment of temperature 35 DEG C aging five days, then battery core is carried out voltage internal resistance screening, screens battery core partial volume list
Charging voltage, in the battery core of 3.6～3.9V, then in the environment of being placed on temperature 35 DEG C aging five days, makes lithium ion battery.
Embodiment 12
The preparation method of a kind of 18650 lithium ion batteries, comprises the steps:
(1) positive plate, negative plate are arranged on automatic winding-machine the most as requested, use barrier film isolation positive plate
And negative plate, the aluminium strip anode ear of positive plate welding simultaneously, negative plate welding nickel strap negative electrode lug is wound, and makes core；Described
Barrier film is ceramic diaphragm；Ceramic diaphragm is prepared from by the two-sided each coating alpha-crystal form aluminium sesquioxide of PE base material；
(2) core is inserted in tool, put into vacuum oven, by being evacuated to-95MPa, at the constant temperature and pressure of 95 DEG C
Baking, nitrogen charging to air pressure is-45MPa afterwards；Evacuation, baking, inflated with nitrogen circulation are implemented 18 hours, water content to core
≤200PPM；
(3) core is installed in box hat, welding negative electrode lug and box hat, inserts PIN steel pipe, install pad, slot rolling, survey
Examination is short-circuit, injection 5.9g electrolyte, welding anode ear and block, then block and box hat fasten sealing formation battery core；Clear electricity
Core outer surface；In this step, operations is 25 DEG C in ambient temperature, completes in the environment of dew point-38 DEG C.
(4) battery core is placed on after activating 40 hours in the environment of temperature is 45 DEG C, is installed on formation cabinet be melted into；
By battery core first in the environment of temperature 45 C aging five days, then battery core is carried out voltage internal resistance screening, screens battery core partial volume list
Charging voltage, in the battery core of 3.6～3.9V, then in the environment of being placed on temperature 45 C aging five days, makes lithium ion battery.
Embodiment 13～17
The positive plate that thered is provided of embodiment 1～5 is provided, the negative plate that embodiment 6～9 is provided, according to embodiment 10～
The lithium ion battery manufacture method that 12 are provided, manufactures lithium ion battery, concrete combined situation such as table 1 below.After preparing
Lithium ion battery carries out the detection of acupuncture percent of pass, cycle performance, summation watt rating, has as shown in table 1.Battery in each embodiment
Compared with prior art, it is superior to prior art；One of acupuncture percent of pass percentage hundred, cycle performance outstanding (575 in embodiment 15
Week), summation watt rating big (4972WH/L), battery in an embodiment shows fitst water.
Table 1
For a person skilled in the art, can technical scheme as described above and design, make other each
Plant corresponding change and deformation, and all these changes and deforms the protection model that all should belong to the claims in the present invention
Within enclosing.
Claims (10)
1. a lithium ion battery, it is characterised in that include positive plate, negative plate, barrier film, electrolyte, box hat, block,
Described positive plate includes following component the most in parts by weight:
18650 lithium ion batteries the most according to claim 1, it is characterised in that described negative plate includes dividing by quality as follows
The component of number meter:
18650 lithium ion batteries the most according to claim 2, it is characterised in that: the gram volume of described graphite is 350-
355mAh/g。
18650 lithium ion batteries the most according to claim 1, it is characterised in that: described positive plate is prepared by the following method
Form:
(1) each component is added in double-planet beater, autobiography speed be 48 turns/min, the public speed that passes be 1700 turns/min's
Under the conditions of stir 2h make slurry；
(2) employing high speed dispersor is under conditions of rotating speed is 3500～4500 turns/min, the slurry that dispersion steps (1) obtains,
7000～9000mPa.s are reached to viscosity；
(3) step (2) obtained slurry is coated on the aluminium foil of 14～16 μ m-thick according to the surface density of 170～200g/, dries
Make positive plate；
(4) according to active matter 3.3～3.5g/mm3Compacted density carry out rolling and make closely knit positive plate；
(5) being cut by positive plate is 57～58mm wide positive plates.
18650 lithium ion batteries the most according to claim 4, it is characterised in that: positive plate is dried to containing by step (3)
The water yield is less than or equal to 0.15%.
18650 lithium ion batteries the most according to claim 3 is characterized in that: described negative plate prepare by the following method and
Become:
(1) each component is joined in double-planet beater, autobiography speed be 48 turns/min, the public speed that passes be 1500 turns/min
Under conditions of stir 2h make slurry；
(2) employing high speed dispersor is under conditions of rotating speed is 3000～4000 turns/min, dispersion steps (1) obtained slurry, extremely
Slurry viscosity reaches 5000～7000mPa.s；
(3) it is coated according to the surface density of 81～95g/ on the Copper Foil of 9～10 μ m-thick, dries and make negative plate；
(4) according to active matter 1.4～1.6g/mm3Compacted density carry out rolling and make closely knit negative plate；
(5) being cut by negative plate is 58.5～59.5mm wide negative plates.
18650 lithium ion batteries the most according to claim 6, it is characterised in that: negative plate is dried to containing by step (3)
The water yield is less than or equal to 0.15%.
8. the preparation method of 18650 lithium ion batteries as claimed in claim 1, it is characterised in that comprise the steps:
(1) positive plate, negative plate are arranged on automatic winding-machine the most as requested, use barrier film isolation positive plate and bear
Pole piece, the aluminium strip anode ear of positive plate welding simultaneously, negative plate welding nickel strap negative electrode lug is wound, and makes core；Described barrier film
For ceramic diaphragm；
(2) core is inserted in tool, put into vacuum oven, by being evacuated to-85～-95MPa, at the constant temperature of 75～95 DEG C
Constant voltage is toasted, and nitrogen charging to air pressure is-35～-45MPa afterwards；Evacuation, baking, inflated with nitrogen circulate enforcement 14～18 hours, extremely
Water content≤200PPM in core；
(3) core is installed in box hat, welding negative electrode lug and box hat, inserts PIN steel pipe, install pad, slot rolling, test short
Road, injects 5.5～5.9g electrolyte, welding anode ear and block, then with box hat fastening sealing, block is formed battery core；Clear electricity
Core outer surface；
(4) battery core is placed on after activating 30～40 hours in the environment of temperature is 35～45 DEG C, is installed on formation cabinet carry out
Chemical conversion；By battery core first in the environment of temperature 35～45 DEG C aging five days, then battery core is carried out voltage internal resistance screening, screening electricity
Core partial volume list charging voltage, in the battery core of 3.6～3.9V, then is placed in the environment of temperature 35～45 DEG C aging five days, makes lithium ion
Battery.
The preparation method of 18650 lithium ion batteries the most according to claim 8, it is characterised in that: step (1) described pottery
Barrier film is prepared from by the two-sided each coating alpha-crystal form aluminium sesquioxide of PE base material.
The preparation method of 18650 lithium ion batteries the most according to claim 8, it is characterised in that: each in step (3)
Operation is 20-25 DEG C in ambient temperature, completes in the environment of dew point-38 DEG C.
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| CN106450291A (en) * | 2016-11-04 | 2017-02-22 | 深圳市卓能新能源股份有限公司 | NCA anode slurry of lithium ion battery and preparation method thereof |
| 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 |
| CN108400333A (en) * | 2018-01-19 | 2018-08-14 | 广西卓能新能源科技有限公司 | A kind of high energy lithium ion cell and preparation method thereof |
| CN109088070A (en) * | 2018-07-18 | 2018-12-25 | 惠州亿纬锂能股份有限公司 | Lithium ion battery and preparation method thereof |
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| CN112151755A (en) * | 2020-09-08 | 2020-12-29 | 江苏塔菲尔新能源科技股份有限公司 | Positive plate and battery |
| CN112599840A (en) * | 2020-12-14 | 2021-04-02 | 广西卓能新能源科技有限公司 | High-rate and high-specific-energy lithium ion battery and preparation method thereof |
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