CN104393230B - A kind of compound method of pulp of lithium ion battery - Google Patents
A kind of compound method of pulp of lithium ion battery Download PDFInfo
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- CN104393230B CN104393230B CN201410590845.0A CN201410590845A CN104393230B CN 104393230 B CN104393230 B CN 104393230B CN 201410590845 A CN201410590845 A CN 201410590845A CN 104393230 B CN104393230 B CN 104393230B
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- slurry
- lithium ion
- ion battery
- conductive agent
- compound method
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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
-
- 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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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
A kind of compound method of pulp of lithium ion battery, is related to lithium ion battery manufacture, it is characterised in that the compound method includes dry-mixed, glue, high-viscosity stirring and solvent dilution.The present invention uses dry blend process, and the mixing of active material and conductive agent can be made more uniform, and saves the slurry-stirring process time；High-viscosity stirring high speed shears dispersed ultrafine machine and carries out high speed shear dispersed ultrafine to the slurry after addition nano-micrometre combined conductive agent, and it is scattered that the various components in nano-micrometre combined conductive agent are carried out with moment microcosmic mixing, the slurry dead angle in conventional mixer is avoided, the uniform effect of dispersed ultrafine is reached；Complete to close slurry under higher viscosity, the viscosity that water is diluted to needs is added before the coating, that is, ensure that the dispersing uniformity for closing slurry in slurry can reduce the conjunction slurry time again.The present invention, which has the advantages that to save, closes slurry time, dispersed ultrafine uniformity.
Description
Technical field
It is more specifically a kind of compound method of pulp of lithium ion battery the present invention relates to lithium ion battery manufacture.
Background technology
Lithium ion battery because of its high power capacity, high voltage, small, light, is had extended cycle life, worked as new green power
Scope is wide, security is good, memory-less effect the advantages of have a wide range of applications future, such as emerging 3C/3G mobile phones, notebook
The portable type electronic products such as computer, tablet personal computer, video camera, and electric automobile, national defense and military equipment power-supply system, photovoltaic
The fields such as energy-storage system, energy alternate peak power station, uninterrupted power source, middle-size and small-size energy-storage system.
During lithium ion battery is manufactured, it is important step that slurry, which makes, and existing technical method can only be from grand
Battery pole piece uniformity is controlled in terms of sight, and it is microcosmic on can not take effective measures control, such as electrode material
With the dispersiveness of conductive agent, binding agent, and battery pole piece it is microcosmic on uniformity etc.；And electrode it is microcosmic on uniformity it is proper
Just it is influence battery consistency key factor the most direct, therefore, the preparation of slurry is also particularly important.
At present, there is no the homogeneity for focusing on slurries in the preparation slurry-stirring process of pulp of lithium ion battery, have the following disadvantages：
1. slurries use static storage, slurries are caused to separate and surface cure；2. slurries not with feed intake it is uniform mix, easily cause tight
The agglomeration of weight；3. soak time is not enough, the appearance of the uneven one of particle in slurries is easily caused；4. during coating, slurries meeting
It is trapped in reservoir container, causes waste, production cost to improve.
The content of the invention
It is an object of the invention to provide a kind of compound method of pulp of lithium ion battery, prior art can be overcome not
Foot, the characteristics of closing slurry time, dispersed ultrafine uniformity with saving.
Technical scheme is as follows：
A kind of compound method of pulp of lithium ion battery, it is characterised in that the compound method includes dry-mixed, glue, height
Viscosity is stirred and solvent dilution.Slurry preparation method comprises the following steps：
（1）By active material and the conductive agent 10-15m/s dry-mixed 20-30min of linear velocity high speed, batch mixing A is made.
（2）Binding agent is added in mixer into 40-60Wt% solvents, turned in mixer with rotation 1200-1800/
Min, 15-30 turns/min of revolution speed be stirred under vacuum obtaining first order slurry.
（3）Above-mentioned batch mixing A is added in first order slurry ,/min, revolution are turned with rotation 2000-2500 in mixer
35-50 turns/min speed carries out high-speed vacuum stirring and highly viscous second level slurry is made.
（4）Remaining 40-60Wt% solvents are added in the slurry of the obtained second level, with rotation 1500- in mixer
2000 turns/min, 20-30 turns/min of revolution speed is stirred under vacuum, and dispersed ultrafine pulp of lithium ion battery is made.
The beneficial effects of the invention are as follows：A kind of compound method of pulp of lithium ion battery of the present invention, can using dry blend process
So that the mixing of active material and conductive agent is more uniform, and save the slurry-stirring process time；The shearing of high-viscosity stirring high speed is super
Finely divided machine carries out high speed shear dispersed ultrafine to the slurry after addition nano-micrometre combined conductive agent, and compound to nano-micrometre
It is scattered that various components in conductive agent carry out moment microcosmic mixing, it is to avoid the slurry dead angle in conventional mixer, reaches ultra-fine
Finely dispersed effect；Complete to close slurry under higher viscosity, the viscosity that water is diluted to needs is added before the coating, that is, ensure to close
The dispersing uniformity of slurry can reduce the conjunction slurry time again in slurry.With save close the slurry time, dispersed ultrafine uniformity it is excellent
Point.
Embodiment
For can further appreciate that the present invention technology contents, feature and effect, with reference to embodiment the present invention is done into
One step explanation.
Embodiment 1
The lithium ion battery anode glue size of the present embodiment is by 1-METHYLPYRROLIDONE (NMP), binding agent Kynoar
（PVDF）, combined conductive agent, LiFePO4 positive electrodes mix, Kynoar, combined conductive agent, LiFePO4 positive pole materials
The weight proportion of material is Kynoar:Combined conductive agent:Positive electrode=4.5%:3.5%:92.0%, wherein 3.5%
Combined conductive agent is made up of 2.5% conductive black Super-P and 1.0% electrically conductive graphite KS-6.The present embodiment anode sizing agent
Preparation specifically comprise the following steps：
（1）By LiFePO4 positive electrodes and the conductive agent 10-15m/s dry-mixed 20-30min of linear velocity high speed, batch mixing is made
A。
（2）Added in mixer in PVDF to 45Wt%NMP ,/min is turned with rotation 1200-1800 in mixer, it is public
The speed for turning 15-30 turns/min be stirred under vacuum obtaining first order slurry.
（3）Above-mentioned batch mixing A is added in first order slurry ,/min, revolution are turned with rotation 2000-2500 in mixer
35-50 turns/min speed carries out high-speed vacuum stirring and highly viscous second level slurry is made.
（4）Remaining 55Wt%NMP is added in the slurry of the obtained second level, with rotation 1500-2000 in mixer
Turn/min, 20-30 turns/min of revolution speed is stirred under vacuum, and anode sizing agent is made.Cross 150 eye mesh screens and viscosity is made
The pulp of lithium ion battery of 8000-10000Mpas ultra-dispersed stabilization.
Embodiment 2
The lithium ion battery cathode slurry of the present embodiment is by deionized water, binding agent（SBR+CMC）, conductive agent（Super-
P）, graphite cathode material mix, binding agent, conductive agent, graphite cathode material weight proportion for binding agent, conductive agent,
Graphite cathode material=4.0%:1.0%:95.0%, wherein 4.0% binding agent is made up of 2.5% SBR and 1.5% CMC.
The preparation of the present embodiment cathode size specifically comprises the following steps：
（1）By graphite cathode material and the conductive agent 10-15m/s dry-mixed 20-30min of linear velocity high speed, batch mixing A is made.
（2）Binding agent is added in mixer into 40Wt% deionized waters, turned in mixer with rotation 1200-1800/
Min, 15-30 turns/min of revolution speed be stirred under vacuum obtaining first order slurry.
（3）Above-mentioned batch mixing A is added in first order slurry ,/min, revolution are turned with rotation 2000-2500 in mixer
35-50 turns/min speed carries out high-speed vacuum stirring and highly viscous second level slurry is made.
（4）Remaining 60Wt% deionized waters are added in the slurry of the obtained second level, with rotation in mixer
1500-2000 turns/min, and 20-30 turns/min of revolution speed is stirred under vacuum, and cathode size is made.Cross 150 eye mesh screen systems
Obtain the pulp of lithium ion battery of viscosity 2000-3000Mpas ultra-dispersed stabilization.
Embodiment described above is only that the preferred embodiment for the present invention is described, not to the scope of the present invention
It is bound, the various modifications and changes that those skilled in the art in the invention make to technical scheme all should
Belong to protection scope of the present invention.
Claims (1)
1. a kind of compound method of pulp of lithium ion battery, it is characterised in that compound method comprises the following steps：By active material
With the conductive agent 10-15m/s dry-mixed 20-30min of linear velocity high speed, batch mixing A is made；Binding agent is added in mixer to 40-
In 60Wt% solvents ,/min is turned with rotation 1200-1800 in mixer, 15-30 turns/min of revolution speed carries out vacuum and stirred
Mix and obtain first order slurry；Above-mentioned batch mixing A is added in first order slurry, turned in mixer with rotation 2000-2500/
Min, 35-50 turns/min of revolution speed carry out high-speed vacuum stirring and highly viscous second level slurry are made；By remaining 40-
60Wt% solvents are added in the slurry of the obtained second level, and/min is turned with rotation 1500-2000 in mixer, and revolve round the sun 20-30
Turn/min speed is stirred under vacuum, obtained dispersed ultrafine pulp of lithium ion battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410590845.0A CN104393230B (en) | 2014-10-29 | 2014-10-29 | A kind of compound method of pulp of lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410590845.0A CN104393230B (en) | 2014-10-29 | 2014-10-29 | A kind of compound method of pulp of lithium ion battery |
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| Publication Number | Publication Date |
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| CN104393230A CN104393230A (en) | 2015-03-04 |
| CN104393230B true CN104393230B (en) | 2017-08-11 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514388A (en) * | 2016-01-08 | 2016-04-20 | 欧赛新能源科技股份有限公司 | Lithium ion positive pole material and mixing method |
| CN108242542B (en) * | 2016-12-24 | 2020-08-11 | 深圳格林德能源集团有限公司 | Polymer lithium ion battery for high-energy-density mobile power supply |
| CN107403914B (en) * | 2017-07-03 | 2020-08-18 | 江西安驰新能源科技有限公司 | Dry mixing process of artificial graphite cathode slurry |
| CN109428056A (en) * | 2017-08-21 | 2019-03-05 | 江苏津谊新能源科技有限公司 | A kind of manufacturing method of high specific energy positive plate |
| CN108923029B (en) * | 2018-06-29 | 2021-09-17 | 桑顿新能源科技(长沙)有限公司 | Preparation method of lithium ion battery anode slurry |
| CN110600674A (en) * | 2019-08-31 | 2019-12-20 | 风帆有限责任公司 | Slurry mixing process of lithium ion battery slurry |
| CN112786866A (en) * | 2021-02-02 | 2021-05-11 | 衡阳市瑞启新能源有限公司 | Solid-state lithium ion storage battery cathode and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148363A (en) * | 2011-03-10 | 2011-08-10 | 湖南丰源业翔晶科新能源股份有限公司 | Preparation method of stable slurry of lithium ion battery |
| CN102354756A (en) * | 2011-11-03 | 2012-02-15 | 湖南丰源业翔晶科新能源股份有限公司 | Burdening technology for slurry used by nanometer ferrous phosphate lithium ion battery |
| CN103022433A (en) * | 2012-11-23 | 2013-04-03 | 彩虹集团公司 | Method for preparing lithium battery slurry |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3579598B2 (en) * | 1998-04-21 | 2004-10-20 | 日本特殊陶業株式会社 | Method for producing slurry for lithium secondary battery electrode |
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- 2014-10-29 CN CN201410590845.0A patent/CN104393230B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148363A (en) * | 2011-03-10 | 2011-08-10 | 湖南丰源业翔晶科新能源股份有限公司 | Preparation method of stable slurry of lithium ion battery |
| CN102354756A (en) * | 2011-11-03 | 2012-02-15 | 湖南丰源业翔晶科新能源股份有限公司 | Burdening technology for slurry used by nanometer ferrous phosphate lithium ion battery |
| CN103022433A (en) * | 2012-11-23 | 2013-04-03 | 彩虹集团公司 | Method for preparing lithium battery slurry |
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