CN105932282A - Lithium ion battery and preparation method thereof - Google Patents
Lithium ion battery and preparation method thereof Download PDFInfo
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- CN105932282A CN105932282A CN201610402257.9A CN201610402257A CN105932282A CN 105932282 A CN105932282 A CN 105932282A CN 201610402257 A CN201610402257 A CN 201610402257A CN 105932282 A CN105932282 A CN 105932282A
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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
- H01M4/5805—Phosphides
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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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- 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 lithium ion battery and a preparation method thereof. The lithium ion battery comprises cathode slurry and anode slurry, wherein the solid content of the cathode slurry is 50.0%-60.0% and the viscosity number is 6000-8000 cp; the solid content of the anode slurry is 40.0%-50.0% and the viscosity number is 3000-5000 cp. The invention further comprises the preparation method. After circulation for 1500 times, the capacity retention ratio of a lithium iron phosphate system lithium ion battery with high magnification, high energy density and long service life is higher than 80.0% and the energy density is greater than 175 Wh/Kg under the high-rate charge-discharge system of 10-20 C; the preparation method has the advantages of simple selected material system, strong controllability of the preparation process, good product consistency and high section first pass yield; the processing first pass yield of a lithium ion battery with the rated capacity of 10 AH reaches up to 87.5%, and the product percent of pass is high and reaches up to 95.3%.
Description
Technical field
The invention belongs to technical field of lithium ion, be specifically related to a kind of lithium ion battery and preparation method thereof.
Background technology
From the point of view of All Around The World scope, after Copenhagen epoch terminate, low-carbon (LC), reduction of discharging, energy-conservation have become as automobile skill
The core competitiveness of art, the research and development energy that countries in the world have been burst out huge in terms of new forms of energy especially new-energy automobile, new energy
The fast-developing period of source automobile (including that public transport bus, logistic car, enterprises and institutions do utility car and private car) industry, face
Face lithium ion battery and can not be provided simultaneously with the problems such as high magnification high-energy-density long-life, to such an extent as to the development of new-energy automobile
Limited by bottleneck with promoting.
At present, it is adaptable to the lithium ion battery as new-energy automobile mainly has the LiMn2O4 system of spinel structure, layer
The ternary material system of shape structure, the LiFePO4 system of olivine structural.But, every kind of lithium-ion battery system itself is all deposited
In some major defects, cycle performance and high-temperature behavior such as LiMn2O4 system are poor；The poor stability of ternary material system；Phosphoric acid
The energy density of ferrum lithium system is relatively small, and the lithium ion battery of LiFePO4 system is more than 3C high power charging-discharging system
Under, after circulating 1000 times, capability retention less than 80.0%, energy density less than 130Wh/Kg, contrast various system lithium ion
The performance of battery, the lithium ion battery of the LiFePO4 system of olivine structural is most potential in new-energy automobile field
's.
Summary of the invention
The technical problem to be solved is, overcomes the drawbacks described above that prior art exists, it is provided that a kind of high magnification
High-energy-density long-life LiFePO4 system lithium ion battery and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is:
The lithium ion battery of the present invention, including anode sizing agent and cathode size, the solid content of described anode sizing agent is 50.0-
60.0%, viscosity number is 6000-8000cp；The solid content of described cathode size is 40.0-50.0%, and viscosity number is 3000-
5000cp。
Further, described anode sizing agent is made up of the raw material of following mass percent:
Graphene modified phosphate ferrum lithium material 95.5-97.5%
Kynoar 2.5-4.5%
By in the stock dispersion of above-mentioned mass percent to N-Methyl pyrrolidone；
Described cathode size is made up of the raw material of following mass percent:
Graphene modification carbonaceous mesophase spherules material 92.5-95.5%
Sodium carboxymethyl cellulose 1.2-2.3%
Binding agent 4.5-5.3%
By in the stock dispersion of above-mentioned mass percent to deionized water.
Further, the one during described binding agent is SBR emulsion, LA132, LA133.
Further, the raw material of described anode sizing agent is distributed in N-Methyl pyrrolidone by planetary mixer；Described negative
The raw material of pole slurry is distributed in deionized water by planetary mixer.
The preparation method of lithium ion battery of the present invention, comprises the following steps:
(1) homogenate: prepared by anode sizing agent preparation and cathode size, the preparation of described anode sizing agent and cathode size preparation are without first
Rear order；
(2) coating: anode sizing agent and cathode size are respectively coated in carbon-coated aluminum foils and copper foil current collector, obtains positive pole volume
Roll up with negative pole；
(3) baking: positive pole volume and negative pole are involved in row baking, removes moisture, makes positive pole volume and the moisture of negative pole volume
Control at below 500ppm；
(4) roll-in: the positive pole of qualified by baking is rolled up and negative pole volume carries out roll-in, the reference of positive pole winding up roller pressure by roll squeezer
Pressure is 10～16Mpa, and the reference pressure of negative pole winding up roller pressure is 8～12Mpa；
(5) cross cutting: with die-cutting machine, positive pole volume qualified after roll-in is become to meet technical matters standard with negative pole cut roll and specify
Positive plate and negative plate；
(6) brush dust: remain in the foreign body on positive plate and negative plate with powder-brushing machine cleaning；
(7) lamination: positive plate, negative plate, barrier film zigzag are built up required battery core with laminating machine；
(8) assemble: battery core is carried out lug shaping, ultra-sonic welded, laser welding and code at quarter；
(9) fluid injection: assemble injection technique technological standards regulation in qualified lithium ion battery to each with filling machine
Electrolyte；
(10) chemical conversion: to each lithium ion battery low current charge first；
(11) aging: to make each lithium ion battery form good SEI film；
(12) partial volume: capacity sorting, performance sieving and grading；
I.e. obtain lithium ion battery.
Further, anode sizing agent preparation comprises the following steps:
Being initially charged N-Methyl pyrrolidone in blender, add Kynoar, N-Methyl pyrrolidone is for poly-inclined
The 3.0-8.0% of fluorothene concentration, start stirring, during stirring first opening revolution stirring open again rotation stirring, mixing speed by low to
Height progressively strengthens, and revolution mixing speed is 25-35rpm, and rotation mixing speed is 300-400rpm, after stirring 10-20min scraper
Normally stirring, revolution mixing speed is 20-30rpm, and rotation mixing speed is 2000-2800rpm, vacuum less than-
0.085Mpa, stirs 180-240min, makes Kynoar complete swelling in N-Methyl pyrrolidone, does not lump；
In blender, add Graphene modified phosphate ferrum lithium material again, first opening revolution stirring during stirring and opening rotation again and stir
Mixing, mixing speed the most progressively strengthens, and revolution mixing speed is 25-35rpm, and rotation mixing speed is 2000-
2800rpm, vacuum is less than-0.085Mpa, stirs 130-180min, opens cooling water control slurry temperature and exist in whipping process
30-40 DEG C, finally add N-Methyl pyrrolidone regulation slurry to the viscosity number needed；
After stirring terminates, first use slurry homogenizer circular treatment slurry 60-90min, then by the mesh screen mistake of 120-200 mesh
Filter, i.e. obtains anode sizing agent.
Further, in described step (1), cathode size preparation comprises the following steps:
Being initially charged deionized water in blender, add sodium carboxymethyl cellulose, deionized water is carboxymethyl cellulose
The 3.0-6.0% of na concn, start stirring, during stirring first opening revolution stirring open again rotation stirring, mixing speed from low to high by
Step strengthens, and revolution mixing speed is 25-35rpm, and rotation mixing speed is 300-400rpm, carries out after stirring 5-10min scraper
Normal stirring, revolution mixing speed is 20-30rpm, and rotation mixing speed is 2000-2500rpm, vacuum is less than-
0.085Mpa, stirs 120-150min, makes sodium carboxymethyl cellulose complete swelling in deionized water, does not lump；
Again in blender add binding agent, during stirring first opening revolution stirring open again rotation stirring, mixing speed by low to
Height progressively strengthens, and revolution mixing speed is 30-40rpm, and rotation mixing speed is 300-500rpm, vacuum less than-
0.085Mpa, stirs 60-90min；
In blender, add Graphene modification carbonaceous mesophase spherules material again, first open revolution stirring during stirring and open rotation again
Stirring, mixing speed the most progressively strengthens, and revolution mixing speed is 25-35rpm, and rotation mixing speed is 300-
400rpm, normally stirs after stirring 10-15min scraper, and revolution mixing speed is 20-30rpm, and rotation mixing speed is
2000-2500rpm, vacuum is less than-0.085Mpa, stirs 180-240min, opens cooling water control slurry temperature in whipping process
Degree, at 30-40 DEG C, finally adds deionized water regulation slurry to the viscosity number needed；
After stirring terminates, first use slurry homogenizer circular treatment slurry 60-90min, then by the mesh screen mistake of 150-200 mesh
Filter, i.e. obtains cathode size.
Further, in described step (2), the coated side density of anode pole piece is 26-28mg/cm2, the coating of cathode pole piece
Coated side density is 12-14mg/cm2。
Further, in described step (3), positive pole volume and negative pole are involved in row vacuum bakeout.
Compared with prior art, the method have the advantages that
(1) high magnification high-energy-density long-life LiFePO4 system lithium ion battery of the present invention is high at 10-20C
Under rate charge-discharge system, after circulating 1500 times, capability retention higher than 80.0%, energy density is more than 175Wh/Kg；
(2) preparation method of the present invention, the material system chosen is simple, and preparation technology controllability is strong, good product consistency,
Workshop section's first-pass yield is high, and rated capacity is that 10AH lithium ion battery process processing first-pass yield is up to 87.5%, and conforming product rate is high, produces
Product qualification rate is up to 95.3%.
Accompanying drawing explanation
Fig. 1 is cyclic curve figure under one embodiment of the invention 20C discharge and recharge system；
Fig. 2 is one embodiment of the invention 20C discharge cycles curve capability analysis figure.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be further described.
Embodiment
The present embodiment provides a kind of rated capacity to be 10AH lithium ion battery,
Comprise the following steps that:
(1) homogenate
Prepared by anode sizing agent:
Precise Kynoar 3.0Kg, weighs N-Methyl pyrrolidone 57Kg by Kynoar concentration 5.0%,
In planetary mixer, it is initially charged N-Methyl pyrrolidone, adds Kynoar, start stirring, first open revolution during stirring and stir
Mixing and open rotation stirring again, mixing speed the most progressively strengthens, and revolution mixing speed is 30rpm, and rotation mixing speed is
320rpm, normally stirs after stirring 10min scraper, and revolution mixing speed is 30rpm, and rotation mixing speed is 2400rpm,
Vacuum is-0.095Mpa, stirs 180min, makes Kynoar complete swelling in N-Methyl pyrrolidone, does not lump；
Precise Graphene modified phosphate ferrum lithium material 97.0Kg adds in blender, first opens revolution stirring again during stirring
Opening rotation stirring, mixing speed the most progressively strengthens, and revolution mixing speed is 35rpm, and rotation mixing speed is
2600rpm, vacuum is-0.095Mpa, stirs 150min, opens cooling water control slurry temperature at 35 ± 2 DEG C in whipping process,
Finally add 20.0Kg N-Methyl pyrrolidone regulation slurry to the viscosity number needed；
After stirring terminates, first use slurry homogenizer circular treatment slurry 90min, then the screen filtration with 120 mesh, obtain
Anode sizing agent, the solid content of described anode sizing agent is 53.0-56.0%, and viscosity number is 6500-6800cp；
Prepared by cathode size:
Precise 2.0Kg sodium carboxymethyl cellulose, weighs deionized water by sodium carboxymethyl cellulose concentration 4.0%
48.0Kg, first adds deionized water in planetary mixer and adds sodium carboxymethyl cellulose again, starts stirring, first opens revolution and stir during stirring
Mixing and open rotation stirring again, mixing speed the most progressively strengthens, and revolution mixing speed is 25rpm, and rotation mixing speed is
300rpm, normally stirs after stirring 5min scraper, and revolution mixing speed is 20rpm, and rotation mixing speed is 2300rpm,
Vacuum is-0.095Mpa, stirs 120-150min, makes sodium carboxymethyl cellulose complete swelling in deionized water, does not tie
Block；
Precise 5.0Kg binding agent SBR emulsion adds in blender, first opens revolution stirring and open certainly again during stirring
Turning stirring, mixing speed the most progressively strengthens, and revolution mixing speed is 30rpm, rotation mixing speed is 32rpm, vacuum
Degree is-0.095Mpa, stirs 60min；
Precise 93.0Kg Graphene modification carbonaceous mesophase spherules material adds in blender, first opens revolution and stir during stirring
Mixing and open rotation stirring again, mixing speed the most progressively strengthens, and revolution mixing speed is 35rpm, and rotation mixing speed is
370rpm, normally stirs after stirring 10min scraper, and revolution mixing speed is 28rpm, and rotation mixing speed is 2300rpm,
Vacuum is-0.095Mpa, stirs 180min, opens cooling water control slurry temperature at 35 ± 2 DEG C, add in whipping process
Enter 60.0Kg deionized water regulation slurry to the viscosity number needed；
After stirring terminates, first use slurry homogenizer circular treatment slurry 60min, then the screen filtration with 180 mesh, obtain
Cathode size, the solid content of described cathode size is 44.0-46.0%, and viscosity number is 3500-3800cp；
Described binding agent is SBR emulsion；
The preparation of described anode sizing agent and cathode size are prepared without sequencing；
(2) coating: anode sizing agent and cathode size are respectively coated in 12 μm carbon-coated aluminum foils and 8 μm copper foil current collector,
The coated side density of anode pole piece is 26 ± 0.26mg/cm2, the coated side density of cathode pole piece is 12 ± 0.12mg/cm2, just obtain
Pole volume and negative pole are rolled up；
(3) baking: positive pole volume and negative pole are involved in row baking, removes moisture, makes positive pole volume and the moisture of negative pole volume
Control at below 500ppm；
(4) roll-in: the positive pole of qualified by baking is rolled up and negative pole volume carries out roll-in, the reference of positive pole winding up roller pressure by roll squeezer
Pressure is 10～12Mpa, and the reference pressure of negative pole winding up roller pressure is 8～9Mpa；
(5) cross cutting: with die-cutting machine, positive pole volume qualified after roll-in is become to meet technical matters standard with negative pole cut roll and specify
Positive plate and negative plate；
(6) brush dust: remain in the foreign body on positive plate and negative plate with powder-brushing machine cleaning；
(7) lamination: positive plate, negative plate, barrier film zigzag are built up required battery core with laminating machine；
(8) assemble: battery core is carried out lug shaping, ultra-sonic welded, laser welding and code at quarter；
(9) fluid injection: assemble injection technique technological standards regulation in qualified lithium ion battery to each with filling machine
Electrolyte；
(10) chemical conversion: to each lithium ion battery low current charge first；
(11) aging: to make each lithium ion battery form good SEI film；
(12) partial volume: capacity sorting, performance sieving and grading；
I.e. obtain lithium ion battery.
As shown in Figures 1 and 2, by process data analysis, rated capacity is that the processing of 10AH lithium ion battery process is straight
Passband is 87.5%, and conforming product rate is 95.3%, and cell energy density is 183Wh/Kg, 20C rate charge-discharge system
After lower circulation 1500 times, capability retention is higher than 80.0%.
Claims (9)
1. a lithium ion battery, it is characterised in that include that anode sizing agent and cathode size, the solid content of described anode sizing agent are
50.0-60.0%, viscosity number is 6000-8000cp；The solid content of described cathode size is 40.0-50.0%, and viscosity number is
3000-5000cp。
Lithium ion battery the most according to claim 1, it is characterised in that described anode sizing agent is by following mass percent
Raw material forms:
Graphene modified phosphate ferrum lithium material 95.5-97.5%；
Kynoar 2.5-4.5%；
By in the stock dispersion of above-mentioned mass percent to N-Methyl pyrrolidone；
Described cathode size is made up of the raw material of following mass percent:
Graphene modification carbonaceous mesophase spherules material 92.5-95.5%；
Sodium carboxymethyl cellulose 1.2-2.3%；
Binding agent 4.5-5.3%；
By in the stock dispersion of above-mentioned mass percent to deionized water.
Lithium ion battery the most according to claim 2, it is characterised in that described binding agent be SBR emulsion,
One in LA132, LA133.
4. want the lithium ion battery described in 2 or 3 according to right, it is characterised in that the raw material of described anode sizing agent is stirred by planet
The machine of mixing is distributed in N-Methyl pyrrolidone；The raw material of described cathode size is distributed in deionized water by planetary mixer.
5. the preparation method of the lithium ion battery as described in any one of claim 1-4, it is characterised in that include following step
Rapid:
(1) homogenate: prepared by anode sizing agent preparation and cathode size, the preparation of described anode sizing agent and cathode size preparation are without the most suitable
Sequence；
(2) coating: anode sizing agent and cathode size are respectively coated in carbon-coated aluminum foils and copper foil current collector, obtains positive pole volume and bears
Pole is rolled up；
(3) baking: positive pole volume and negative pole are involved in row baking, removes moisture, makes the moisture of positive pole volume and negative pole volume control
At below 500ppm；
(4) roll-in: the positive pole of qualified by baking is rolled up and negative pole volume carries out roll-in, the reference pressure of positive pole winding up roller pressure by roll squeezer
Being 10～16Mpa, the reference pressure of negative pole winding up roller pressure is 8～12Mpa；
(5) cross cutting: with die-cutting machine, positive pole volume qualified after roll-in is become to meet technical matters standard with negative pole cut roll and just specifying
Pole piece and negative plate；
(6) brush dust: remain in the foreign body on positive plate and negative plate with powder-brushing machine cleaning；
(7) lamination: positive plate, negative plate, barrier film zigzag are built up required battery core with laminating machine；
(8) assemble: battery core is carried out lug shaping, ultra-sonic welded, laser welding and code at quarter；
(9) fluid injection: assemble, to each, the electrolysis that in qualified lithium ion battery, injection technique technological standards specifies with filling machine
Liquid；
(10) chemical conversion: to each lithium ion battery low current charge first；
(11) aging: to make each lithium ion battery form good SEI film；
(12) partial volume: capacity sorting, performance sieving and grading；
I.e. obtain lithium ion battery.
The preparation method of lithium ion battery the most according to claim 5, it is characterised in that in described step (1), positive pole is starched
Material preparation comprises the following steps:
Being initially charged N-Methyl pyrrolidone in blender, add Kynoar, N-Methyl pyrrolidone is polyvinylidene fluoride
The 3.0-8.0% of alkene concentration, start stirring, during stirring first opening revolution stirring open again rotation stirring, mixing speed from low to high by
Step strengthens, and revolution mixing speed is 25-35rpm, and rotation mixing speed is 300-400rpm, carries out after stirring 10-20min scraper
Normal stirring, revolution mixing speed is 20-30rpm, and rotation mixing speed is 2000-2800rpm, vacuum is less than-
0.085Mpa, stirs 180-240min, makes Kynoar complete swelling in N-Methyl pyrrolidone, does not lump；
In blender, add Graphene modified phosphate ferrum lithium material again, first open revolution stirring during stirring and open rotation stirring again, stir
Mixing speed the most progressively to strengthen, revolution mixing speed is 25-35rpm, and rotation mixing speed is 2000-2800rpm, vacuum
Degree less than-0.085Mpa, stirs 130-180min, opens cooling water control slurry temperature at 30-40 DEG C, the most again in whipping process
Add N-Methyl pyrrolidone regulation slurry to the viscosity number needed；
After stirring terminates, first use slurry homogenizer circular treatment slurry 60-90min, then the screen filtration with 120-200 mesh,
I.e. obtain anode sizing agent.
7. according to the preparation method of the lithium ion battery described in claim 5 or 6, it is characterised in that in described step (1), negative
Pole slurry preparation comprises the following steps:
Being initially charged deionized water in blender, add sodium carboxymethyl cellulose, deionized water is that sodium carboxymethyl cellulose is dense
The 3.0-6.0% of degree, starts stirring, first opens revolution stirring and open rotation stirring again during stirring, and mixing speed the most progressively adds
Greatly, revolution mixing speed is 25-35rpm, and rotation mixing speed is 300-400rpm, carries out normal after stirring 5-10min scraper
Stirring, revolution mixing speed is 20-30rpm, and rotation mixing speed is 2000-2500rpm, and vacuum is less than-0.085Mpa, stirs
Mix 120-150min, make sodium carboxymethyl cellulose complete swelling in deionized water, do not lump；
Again in blender add binding agent, during stirring first opening revolution stirring open again rotation stirring, mixing speed from low to high by
Step strengthens, and revolution mixing speed is 30-40rpm, and rotation mixing speed is 300-500rpm, and vacuum is less than-0.085Mpa, stirs
Mix 60-90min；
In blender, add Graphene modification carbonaceous mesophase spherules material again, first opening revolution stirring during stirring and opening rotation again and stir
Mixing, mixing speed the most progressively strengthens, and revolution mixing speed is 25-35rpm, and rotation mixing speed is 300-400rpm,
Normally stirring after stirring 10-15min scraper, revolution mixing speed is 20-30rpm, and rotation mixing speed is 2000-
2500rpm, vacuum is less than-0.085Mpa, stirs 180-240min, opens cooling water control slurry temperature and exist in whipping process
30-40 DEG C, finally add deionized water regulation slurry to the viscosity number needed；
After stirring terminates, first use slurry homogenizer circular treatment slurry 60-90min, then the screen filtration with 150-200 mesh,
I.e. obtain cathode size.
The preparation method of lithium ion battery the most according to claim 5, it is characterised in that in described step (2), positive pole pole
The coated side density of sheet is 26-28mg/cm2, the coated side density of cathode pole piece is 12-14mg/cm2。
The preparation method of lithium ion battery the most according to claim 5, it is characterised in that in described step (3), to positive pole
Volume and negative pole involve in row vacuum bakeout.
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| CN106159341A (en) * | 2016-08-29 | 2016-11-23 | 江苏天鹏电源有限公司 | A kind of novel lithium battery production technology |
| CN106731927A (en) * | 2016-12-16 | 2017-05-31 | 武汉理工力强能源有限公司 | A kind of preparation method of lithium metal even particulate dispersion slurry |
| KR20180107758A (en) * | 2017-03-22 | 2018-10-02 | 주식회사 엘지화학 | Method for preparing positive electrode slurry composition for secondary battery, positive electrode for secondary battery by using the same, and lithium secondary battery comprising the same |
| CN109860552A (en) * | 2019-01-26 | 2019-06-07 | 江苏润寅石墨烯科技有限公司 | A kind of 18650 cylindrical battery of solar street light and preparation method thereof |
| CN110088941A (en) * | 2016-12-16 | 2019-08-02 | 美敦力公司 | Lithium ion battery and sterilizing methods |
| CN110120555A (en) * | 2019-05-16 | 2019-08-13 | 江苏润寅石墨烯科技有限公司 | A kind of preparation method of high circulation service life lithium battery |
| CN112635812A (en) * | 2019-09-24 | 2021-04-09 | 深圳市莫提尔科技有限公司 | High-power lithium iron phosphate start-stop lithium ion battery and preparation method thereof |
| CN114069075A (en) * | 2021-10-27 | 2022-02-18 | 风帆有限责任公司 | Lithium ion battery self-discharge screening method |
| US11283058B2 (en) * | 2017-03-22 | 2022-03-22 | Lg Energy Solution, Ltd. | Method of preparing slurry composition for secondary battery positive electrode, positive electrode for secondary battery prepared by using the same, and lithium secondary battery including the positive electrode |
| CN114597344A (en) * | 2022-03-07 | 2022-06-07 | 惠州市赛能电池有限公司 | Preparation method of silicon negative plate |
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| CN110120555A (en) * | 2019-05-16 | 2019-08-13 | 江苏润寅石墨烯科技有限公司 | A kind of preparation method of high circulation service life lithium battery |
| CN112635812A (en) * | 2019-09-24 | 2021-04-09 | 深圳市莫提尔科技有限公司 | High-power lithium iron phosphate start-stop lithium ion battery and preparation method thereof |
| CN114069075A (en) * | 2021-10-27 | 2022-02-18 | 风帆有限责任公司 | Lithium ion battery self-discharge screening method |
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| CN114597344A (en) * | 2022-03-07 | 2022-06-07 | 惠州市赛能电池有限公司 | Preparation method of silicon negative plate |
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