CN104766949A - Processing method of lithium ion battery negative electrode slurry - Google Patents
Processing method of lithium ion battery negative electrode slurry Download PDFInfo
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- CN104766949A CN104766949A CN201410008022.2A CN201410008022A CN104766949A CN 104766949 A CN104766949 A CN 104766949A CN 201410008022 A CN201410008022 A CN 201410008022A CN 104766949 A CN104766949 A CN 104766949A
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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
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
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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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Abstract
The invention relates to a processing method of a lithium ion battery negative electrode slurry, wherein the processing method comprises the following steps: negative electrode powder dry mixing, muddy stirring, high viscosity stirring, viscosity adjusting stirring, and vacuumizing and degassing, wherein the negative electrode powder dry mixing comprises putting graphite, a dispersion agent sodium carboxymethylcellulose and a conductive agent into a double planetary stirrer, carrying out dry mixing stirring, setting the dry mixing stirring time to be 30 min-120 min, starting the double planetary stirrer with the revolution speed of 20 RPM-60 RPM and the autoroatation speed of 0 RPM-500 RPM, and thus obtaining a powder mixture. According to the processing method, the energy can be effectively saved, the slurry preparation time can be effectively shortened, the utilization rate of equipment can be effectively improved, and thus benefits are created for enterprises; and the overall dispersion step is simple and convenient to operate, the production process is safe, and the product quality is easily ensured.
Description
Technical field
The present invention relates to a kind of processing method of lithium ion battery, particularly relate to a kind of processing method of lithium ion battery cathode slurry.
Background technology
Lithium ion battery is the advantages such as energy density is high, output voltage is high, have extended cycle life, environmental pollution is little owing to having, and be applied widely, also have broad application prospects in the field such as electric automobile, Aero-Space in small size digital electronic product.But, with lithium ion battery Industry Quick Development, industry lithium ion battery price, performance, the product phase of handing over controls dog-eat-dog, low cost, high performance-price ratio battery become the wind vane of current lithium ion battery industry competition, for improving the competitiveness of battery in market, the battery core product of high performance-price ratio, short sawn timber friendship phase is the trump to success on market.The method adopting traditional solvent and siccative directly to mix produces the effect that battery cathode slurry will reach same, and mixing time is relatively long, and pulping efficiency is low, and energy consumption is large.
Summary of the invention
Object of the present invention is just to provide a kind of processing method of lithium ion battery cathode slurry.
For achieving the above object, the present invention adopts following technical scheme:
A processing method for lithium ion battery cathode slurry, is characterized in that comprising the following steps:
(1), negative pole powder is dry mixed, by graphite (containing native graphite, Delanium) 85%-98%, dispersing agent C MC(sodium carboxymethylcellulose) 1%-5%, conductive agent (carbon black or electrically conductive graphite) 1%-10% put into double planetary mixer and carry out being dry mixed stirring, be dry mixed mixing time and be set as 30min-120min, open double planetary mixer, revolution: 20 RPM-60RPM, rotation: 0 RPM-500RPM, obtains powders mixture;
(2), pureed stir, in powders mixture, add the 30-60% solvent of relative powder weight, pureed mixing time setting 30min-240min, open double planetary mixer stir, revolution: 20RPM-60RPM, rotation: 0-500RPM, obtains pureed mixture;
(3) high-viscosity stirring, for adding the 10-30% solvent of relative powder weight in pureed mixture, high-viscosity stirring time setting 30min-240min, open double planetary mixer, revolution: 20RPM-60RPM, rotation: 0RPM-1000RPM, carries out the high-viscosity stirring of more than 50000mpa.s, obtains highly viscous slurry;
(4) viscosity regulates and stirs, highly viscous slurry adds the 10-50% solvent of relative powder weight, and add liquid adhesive butadiene-styrene rubber in the 1%-5% ratio of highly viscous slurry, mixing time setting 30min-120min, open double planetary mixer, revolution: 20RPM-60RPM, rotation: 0RPM-1500RPM, obtains the slurry that satisfactory viscosity is adjusted;
(5), vacuumize degasification, seal in double planetary mixer, unlatching vacuum extractor is pumped to vacuum in mixer and reaches below-90Kpa, opens double planetary mixer simultaneously, revolution: 10 RPM-30RPM, rotation: 0 RPM-200RPM; Puddler reverses, and time setting 20-60min, obtains cathode size.
Described solvent is 1-METHYLPYRROLIDONE, deionized water, distilled water one wherein.
Beneficial effect of the present invention: effectively can save the energy, shorten processing time, improve utilization rate of equipment and installations, thus be enterprise's creation benefit; The simple convenient operation of overall dispersion steps, production process safety easily ensures the quality of product; First negative pole powder dry powder stirs, and more easily stirs, and because powder does not have toughness, stirs resistance less, expends power also little; Pureed stirs carries out pureed stirring more easily to the powder stirred, because material evenly, as long as solvent fully can mix with powder just reach object, solvent can adopt the method for sprinkling to inject powder; Viscosity regulates to stir and more easily operates, under stirring, evenly add solvent, and mixing more easily evenly, and shortens incorporation time, raises the efficiency; Vacuumize degasification and the rotating wherein in step and more effectively remove bubble in slurry.
Embodiment
Embodiment one:
A processing method for lithium ion battery cathode slurry, is characterized in that comprising the following steps:
(1), negative pole powder is dry mixed, by graphite FSN-1(containing native graphite, Delanium) ratio 95%, dispersing agent C MC(sodium carboxymethylcellulose) ratio: 1.5%, conductive agent S-P(carbon black) ratio: 2% puts into 300L double planetary mixer carries out being dry mixed stirring, be dry mixed mixing time and be set as 60min, open double planetary mixer, revolution: 35 RPM, rotation: 200RPM, obtains powders mixture;
(2), pureed stirs, 35% solvent of relative powder weight is added in powders mixture, solvent selects 1-METHYLPYRROLIDONE, deionized water, distilled water one wherein, pureed mixing time setting 60min, unlatching double planetary mixer stirs, revolution: 38RPM, rotation: 200RPM, obtains pureed mixture;
(3) high-viscosity stirring, for adding 15% solvent of relative powder weight in pureed mixture, solvent selects 1-METHYLPYRROLIDONE, deionized water, distilled water one wherein, high-viscosity stirring time setting 100min, open double planetary mixer, revolution: 30RPM, rotation: 80RPM, carry out the high-viscosity stirring of more than 50000mpa.s, obtain highly viscous slurry;
(4) viscosity regulates and stirs, highly viscous slurry adds 37% solvent of relative powder weight, solvent selects 1-METHYLPYRROLIDONE, deionized water, distilled water one wherein, and add liquid adhesive PVDF(polyvinylidene fluoride in 3% ratio of highly viscous slurry) or SBR(butadiene-styrene rubber), mixing time setting 58min, opens double planetary mixer, revolution: 42RPM, rotation: 60RPM, obtains the slurry that satisfactory viscosity is adjusted;
(5), vacuumize degasification, seal in double planetary mixer, unlatching vacuum extractor is pumped to vacuum in mixer and reaches below-90Kpa, opens double planetary mixer simultaneously, revolution: 20RPM, rotation: 80RPM; Puddler reverses, and time setting 40min, obtains cathode size.
Embodiment two:
A processing method for lithium ion battery cathode slurry, is characterized in that comprising the following steps:
(1), negative pole powder is dry mixed, by graphite BTR-918(containing native graphite, Delanium) ratio 97%, dispersing agent C MC(sodium carboxymethylcellulose) ratio 1.5%, conductive agent SFG-6(electrically conductive graphite) ratio 1% puts into 300L double planetary mixer and carries out being dry mixed stirring, be dry mixed mixing time and be set as 50min, open double planetary mixer, revolution: 40M, rotation: 250RPM, obtains powders mixture;
(2), pureed stirs, 35% solvent of relative powder weight is added in powders mixture, solvent is 1-METHYLPYRROLIDONE, deionized water, distilled water one wherein, pureed mixing time setting 50min, unlatching double planetary mixer stirs, revolution: 45RPM, rotation: 250RPM, obtains pureed mixture;
(3) high-viscosity stirring, for adding 18% solvent of relative powder weight in pureed mixture, solvent is 1-METHYLPYRROLIDONE, deionized water, distilled water one wherein, high-viscosity stirring time setting 80min, open double planetary mixer, revolution: 35RPM, rotation: 100RPM, carry out the high-viscosity stirring of more than 50000mpa.s, obtain highly viscous slurry;
(4) viscosity regulates and stirs, highly viscous slurry adds 32% solvent of relative powder weight, solvent is 1-METHYLPYRROLIDONE, deionized water, distilled water one wherein, and add liquid adhesive PVDF(polyvinylidene fluoride in 4% ratio of highly viscous slurry) or SBR(butadiene-styrene rubber), mixing time setting 62min, opens double planetary mixer, revolution: 35RPM, rotation: 65RPM, obtains the slurry that satisfactory viscosity is adjusted;
(5), vacuumize degasification, seal in double planetary mixer, unlatching vacuum extractor is pumped to vacuum in mixer and reaches below-90Kpa, opens double planetary mixer simultaneously, revolution: 30RPM, rotation: 70RPM; Puddler reverses, and time setting 35min, obtains cathode size.
Solvent described above comprises: 1-METHYLPYRROLIDONE, deionized water, distilled water, can use two kinds wherein.
Main feature of the present invention adopts negative pole powder to be dry mixed, and negative pole powder dry powder stirs, and more easily stirs, more saves time, and because powder does not have toughness, stirs resistance less, expend power also little; Pureed stirs carries out pureed stirring more easily, because material evenly, as long as solvent fully can mix with powder just reach object to the powder stirred.
Claims (2)
1. a processing method for lithium ion battery cathode slurry, is characterized in that comprising the following steps:
(1), negative pole powder is dry mixed: graphite, dispersant, conductive agent are put into double planetary mixer and carried out being dry mixed stirring, be dry mixed mixing time and be set as 30min-120min, open double planetary mixer, revolution: 20 RPM-60RPM, rotation: 0RPM-500RPM, obtains powders mixture;
(2), pureed stirs: the 30-60% solvent adding relative powder weight in powders mixture, pureed mixing time setting 30min-240min, opens double planetary mixer and stirs, revolution: 20RPM-60RPM, rotation: 0RPM-500RPM, obtains pureed mixture;
(3) high-viscosity stirring: for adding the 10-30% solvent of relative powder weight in pureed mixture, high-viscosity stirring time setting 30min-240min, open double planetary mixer, revolution: 20RPM-60RPM, rotation: 0RPM-1000RPM, carry out the high-viscosity stirring of more than 50000mpa.s, obtain highly viscous slurry;
(4) viscosity regulates and stirs: highly viscous slurry adds the 10-50% solvent of relative powder weight, and add liquid adhesive in the 1%-5% ratio of highly viscous slurry, mixing time setting 30min-120min, open double planetary mixer, revolution: 20RPM-60RPM, rotation: 0RPM-1500RPM, obtains the slurry that satisfactory viscosity is adjusted;
(5), vacuumize degasification: seal in double planetary mixer, unlatching vacuum extractor is pumped to vacuum in mixer and reaches below-90Kpa, opens double planetary mixer simultaneously, revolution: 10RPM-30RPM, rotation: 0RPM-200RPM; Puddler reverses, and time setting 20-60min, obtains cathode size.
2. the processing method of a kind of lithium ion battery cathode slurry according to claim 1, is characterized in that: described solvent is 1-METHYLPYRROLIDONE, deionized water or distilled water one wherein.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058292A (en) * | 2016-02-03 | 2016-10-26 | 万向A二三系统有限公司 | Preparation method for lithium-ion button cell |
| WO2017032154A1 (en) * | 2015-08-25 | 2017-03-02 | 田东 | Method for preparing graphite cathode slurry for lithium battery |
| CN106784633A (en) * | 2015-11-25 | 2017-05-31 | 深圳市沃特玛电池有限公司 | The preparation method of lithium ion battery cathode slurry |
| CN106848204A (en) * | 2015-12-05 | 2017-06-13 | 中山天贸电池有限公司 | A kind of method for mixing of graphite material at negative |
| CN107403914A (en) * | 2017-07-03 | 2017-11-28 | 江西安驰新能源科技有限公司 | A kind of dry mixing process of artificial plumbago negative pole slurry |
| CN107732142A (en) * | 2017-10-10 | 2018-02-23 | 中航锂电（江苏）有限公司 | A kind of lithium ion battery cathode slurry process for dispersing |
| CN108091839A (en) * | 2017-11-27 | 2018-05-29 | 浙江衡远新能源科技有限公司 | A kind of preparation method of lithium-sulphur cell positive electrode slurry |
| CN108172750A (en) * | 2017-12-07 | 2018-06-15 | 银隆新能源股份有限公司 | The preparation method of graphite negative electrode of lithium ion battery highly viscous slurry |
| CN108281640A (en) * | 2018-01-31 | 2018-07-13 | 北京国能电池科技股份有限公司 | Proportioning process, based lithium-ion battery positive plate and the lithium ion battery of lithium ion battery anode glue size |
| CN108305989A (en) * | 2017-12-25 | 2018-07-20 | 风帆有限责任公司 | A kind of the cathode painting cream and production method of fast charging and discharging type high power lithium ion cell |
| CN108636145A (en) * | 2018-04-27 | 2018-10-12 | 广州市云通磁电股份有限公司 | A kind of dry method slurry preparation technique |
| CN109378446A (en) * | 2018-11-12 | 2019-02-22 | 天津银隆新能源有限公司 | The 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 |
| CN111725503A (en) * | 2020-04-30 | 2020-09-29 | 江西安驰新能源科技有限公司 | Lithium ion battery cathode slurry mixing process |
| CN112838185A (en) * | 2021-01-05 | 2021-05-25 | 苏州宇量电池有限公司 | Multi-solvent system lithium ion battery cathode batching method |
| CN114927679A (en) * | 2022-03-07 | 2022-08-19 | 上海兰钧新能源科技有限公司 | Lithium battery negative electrode slurry and preparation method thereof |
| CN115041071A (en) * | 2022-06-24 | 2022-09-13 | 郑州比克电池有限公司 | Homogenate process for improving negative electrode screen blockage |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017032154A1 (en) * | 2015-08-25 | 2017-03-02 | 田东 | Method for preparing graphite cathode slurry for lithium battery |
| CN106784633A (en) * | 2015-11-25 | 2017-05-31 | 深圳市沃特玛电池有限公司 | The preparation method of lithium ion battery cathode slurry |
| CN106848204B (en) * | 2015-12-05 | 2019-10-18 | 中山天贸电池有限公司 | A kind of method for mixing of graphite material at negative |
| CN106848204A (en) * | 2015-12-05 | 2017-06-13 | 中山天贸电池有限公司 | A kind of method for mixing of graphite material at negative |
| CN106058292A (en) * | 2016-02-03 | 2016-10-26 | 万向A二三系统有限公司 | Preparation method for lithium-ion button cell |
| CN107403914A (en) * | 2017-07-03 | 2017-11-28 | 江西安驰新能源科技有限公司 | A kind of dry mixing process of artificial plumbago negative pole slurry |
| CN107732142A (en) * | 2017-10-10 | 2018-02-23 | 中航锂电（江苏）有限公司 | A kind of lithium ion battery cathode slurry process for dispersing |
| CN108091839A (en) * | 2017-11-27 | 2018-05-29 | 浙江衡远新能源科技有限公司 | A kind of preparation method of lithium-sulphur cell positive electrode slurry |
| CN108091839B (en) * | 2017-11-27 | 2021-03-30 | 浙江衡远新能源科技有限公司 | Preparation method of lithium-sulfur battery positive electrode slurry |
| CN108172750A (en) * | 2017-12-07 | 2018-06-15 | 银隆新能源股份有限公司 | The preparation method of graphite negative electrode of lithium ion battery highly viscous slurry |
| CN108305989A (en) * | 2017-12-25 | 2018-07-20 | 风帆有限责任公司 | A kind of the cathode painting cream and production method of fast charging and discharging type high power lithium ion cell |
| CN108281640B (en) * | 2018-01-31 | 2021-02-09 | 北京国能电池科技股份有限公司 | Batching process of lithium ion battery anode slurry, lithium ion battery anode plate and lithium ion battery |
| CN108281640A (en) * | 2018-01-31 | 2018-07-13 | 北京国能电池科技股份有限公司 | Proportioning process, based lithium-ion battery positive plate and the lithium ion battery of lithium ion battery anode glue size |
| CN108636145A (en) * | 2018-04-27 | 2018-10-12 | 广州市云通磁电股份有限公司 | A kind of dry method slurry preparation technique |
| CN109378446A (en) * | 2018-11-12 | 2019-02-22 | 天津银隆新能源有限公司 | The 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 |
| CN111725503A (en) * | 2020-04-30 | 2020-09-29 | 江西安驰新能源科技有限公司 | Lithium ion battery cathode slurry mixing process |
| CN112838185A (en) * | 2021-01-05 | 2021-05-25 | 苏州宇量电池有限公司 | Multi-solvent system lithium ion battery cathode batching method |
| CN114927679A (en) * | 2022-03-07 | 2022-08-19 | 上海兰钧新能源科技有限公司 | Lithium battery negative electrode slurry and preparation method thereof |
| CN114927679B (en) * | 2022-03-07 | 2024-05-24 | 上海兰钧新能源科技有限公司 | Lithium battery negative electrode slurry and manufacturing method thereof |
| CN115041071A (en) * | 2022-06-24 | 2022-09-13 | 郑州比克电池有限公司 | Homogenate process for improving negative electrode screen blockage |
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