CN115138231A - Mixing method for improving consistency of lithium ion battery slurry - Google Patents
Mixing method for improving consistency of lithium ion battery slurry Download PDFInfo
- Publication number
- CN115138231A CN115138231A CN202210971367.2A CN202210971367A CN115138231A CN 115138231 A CN115138231 A CN 115138231A CN 202210971367 A CN202210971367 A CN 202210971367A CN 115138231 A CN115138231 A CN 115138231A
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- China
- Prior art keywords
- slurry
- revolving
- stirring
- glue solution
- 60min
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- 239000002002 slurry Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000002156 mixing Methods 0.000 title claims abstract description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 9
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 9
- 239000003292 glue Substances 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 239000006258 conductive agent Substances 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000654 additive Substances 0.000 claims abstract description 4
- 230000000996 additive effect Effects 0.000 claims abstract description 4
- 239000011230 binding agent Substances 0.000 claims abstract description 4
- 239000002904 solvent Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 description 3
- 239000011267 electrode slurry Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 description 1
- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical compound [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/43—Mixing liquids with liquids; Emulsifying using driven stirrers
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a mixing method for improving consistency of lithium ion battery slurry, which comprises the following steps of weighing a binder, a solvent and an additive, putting the binder, the solvent and the additive into a glue making machine, and preparing a glue solution; putting the main material and the conductive agent into a double-planet 1300L stirrer for mixing; adding 10-15% glue solution, allowing the motor current of the high-speed dispersing pulp to reach 55% of the rated current of the motor, revolving at 20rpm, allowing the high-speed dispersing pulp to rotate at 400rpm, and stirring for 60min; adding glue solution 40-50% of the total amount, allowing the motor current of the high-speed dispersing pulp to reach 95% of the rated current of the motor, revolving at 30rpm, rotating at 900rpm of the high-speed dispersing pulp, and stirring for 60min; adding the rest glue solution, revolving at 30rpm, dispersing at 1100rpm for 60min; defoaming the slurry, revolving at 10rpm, vacuumizing to-0.08 MPa, and stirring for 30min. The slurry mixing method eliminates the slurry difference among the boiler times, ensures good slurry consistency and improves the stability of the slurry viscosity.
Description
Technical Field
The invention relates to the technical field of lithium ion battery processing, in particular to a mixing method for improving consistency of lithium ion battery slurry.
Background
The preparation of the lithium ion battery slurry is an important front-stage process in battery manufacturing, and the consistency of the slurry directly influences the consistency of the coating and rolling rear-stage processes and the consistency of the electrical performance of the battery. Due to the difference between the battery raw material batches, the traditional stirring process is adopted, and the problems of poor consistency of slurry and large viscosity fluctuation of the slurry in different pot times are shown.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a mixing method for improving the consistency of lithium ion battery slurry.
The invention aims to realize the purpose by the following technical scheme that the mixing method for improving the consistency of the lithium ion battery slurry comprises the following steps,
1) Weighing the binder, the solvent and the additive according to the proportion, and putting the mixture into a glue making machine to prepare glue solution;
2) Weighing the main materials and the conductive agent according to the proportion, and putting the main materials and the conductive agent into a double-planet 1300L stirrer for mixing;
3) Adding 10-15% glue solution into double planetary stirrer, with the motor current of high-speed dispersing pulp reaching 55% of motor rated current, revolving at 20rpm, rotating at 400rpm, and stirring for 60min;
4) Adding 40-50% glue solution into double planetary mixer, allowing the motor current of high-speed dispersing pulp to reach 95% of the rated current of the motor, revolving at 30rpm, rotating at 900rpm, and stirring for 60min;
5) Adding the rest glue solution into a double-planet stirrer, and performing revolution at 30rpm, high-speed dispersion at 1100rpm, and stirring for 60min;
6) Defoaming the slurry, revolving at 10rpm, vacuumizing to-0.08 MPa, and stirring for 30min.
The invention has the following advantages: the slurry difference among the boiler steps is eliminated, the slurry consistency is good, the slurry viscosity is stable and is not more than +/-50 mPa.s, the consistency of the back-section coating and rolling processes is further improved, and the consistency of the electrical property of the battery cell is further improved.
Drawings
FIG. 1 is a graph comparing the viscosities of conventional and inventive slurries of positive electrode slurry;
fig. 2 is a graph comparing the viscosity of slurry in the conventional process and the process of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following description will be clearly and completely made in conjunction with the technical solutions of the embodiments.
Example 1, a positive electrode slurry was prepared as follows,
1) According to the adhesive: weighing NMP =1.3, and placing the weighed NMP = 34 into a glue making machine to prepare a positive glue solution;
2) Preparing lithium nickel cobalt manganese oxide: conductive agent: adhesive: NMP =100, 1.8: double twist low-speed paddle and two high-speed dispersion discs.
3) Adding 10-15% glue solution into double planetary stirrer, with the motor current of high-speed dispersing pulp reaching 55% of motor rated current, revolving at 20rpm, rotating at 400rpm, and stirring for 60min;
4) Adding 40-50% glue solution into double planetary mixer, allowing the motor current of high-speed dispersing pulp to reach 95% of the rated current of the motor, revolving at 30rpm, rotating at 900rpm, and stirring for 60min;
5) Adding the rest glue solution into a double-planet stirrer, and performing revolution at 30rpm, high-speed dispersion at 1100rpm, and stirring for 60min;
6) Defoaming the slurry, revolving at 10rpm, vacuumizing to-0.08 MPa, and stirring for 30min.
Example 2, a negative electrode slurry was prepared as follows,
1) According to CMC: weighing deionized water = 1.3;
2) According to main materials: conductive agent: CMC: SBR: NMP =100, 0.8;
3) Adding 10-15% glue solution into double planetary stirrer, with the motor current of high-speed dispersing pulp reaching 55% of motor rated current, revolving at 20rpm, rotating at 400rpm, and stirring for 60min;
4) Adding 40-50% glue solution into double planetary stirrer, with the motor current of high-speed dispersing pulp reaching 95% of motor rated current, revolving at 30rpm, rotating at 900rpm, and stirring for 60min;
5) Adding the rest glue solution into a double-planet stirrer, revolving at 30rpm, rotating at 1100rpm for high-speed dispersing slurry, and stirring for 60min;
6) Defoaming the slurry, revolving at 10rpm, vacuumizing to-0.08 MPa, and stirring for 30min.
The viscosity detection of the slurries prepared in the example 1 and the example 2 is performed and compared with the conventional process, and the results are shown in fig. 1 and fig. 2, which illustrate that the viscosity fluctuation range of the slurry prepared by the mixing method of the present invention is not more than ± 50mpa · s, the viscosity of the slurry is stable, and the consistency of the slurry between different boiler times can be improved by using the method.
Claims (1)
1. A mixing method for improving consistency of lithium ion battery slurry is characterized by comprising the following steps,
1) Weighing the binder, the solvent and the additive according to the proportion, and putting the mixture into a glue making machine to prepare glue solution;
2) Weighing the main materials and the conductive agent according to the proportion, and putting the main materials and the conductive agent into a double-planet 1300L stirrer for mixing;
3) Adding 10-15% glue solution into double planetary mixer, allowing the motor current of high-speed dispersing pulp to reach 55% of the rated current of the motor, revolving at 20rpm, rotating at 400rpm, and stirring for 60min;
4) Adding 40-50% glue solution into double planetary mixer, allowing the motor current of high-speed dispersing pulp to reach 95% of the rated current of the motor, revolving at 30rpm, rotating at 900rpm, and stirring for 60min;
5) Adding the rest glue solution into a double-planet stirrer, revolving at 30rpm, rotating at 1100rpm for high-speed dispersing slurry, and stirring for 60min;
6) Defoaming the slurry, revolving at 10rpm, vacuumizing to-0.08 MPa, and stirring for 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210971367.2A CN115138231A (en) | 2022-08-12 | 2022-08-12 | Mixing method for improving consistency of lithium ion battery slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210971367.2A CN115138231A (en) | 2022-08-12 | 2022-08-12 | Mixing method for improving consistency of lithium ion battery slurry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115138231A true CN115138231A (en) | 2022-10-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210971367.2A Pending CN115138231A (en) | 2022-08-12 | 2022-08-12 | Mixing method for improving consistency of lithium ion battery slurry |
Country Status (1)
| Country | Link |
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| CN (1) | CN115138231A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024098419A1 (en) * | 2022-11-11 | 2024-05-16 | 宁德时代新能源科技股份有限公司 | Preparation method for positive electrode slurry, secondary battery, battery pack and electrical apparatus |
Citations (11)
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|---|---|---|---|---|
| JP2000012001A (en) * | 1998-04-21 | 2000-01-14 | Japan Energy Corp | Manufacture of slurry for lithium secondary battery electrode |
| WO2016169289A1 (en) * | 2015-04-20 | 2016-10-27 | 田东 | Method for preparing lithium ion battery negative electrode slurry |
| CN106159266A (en) * | 2016-08-31 | 2016-11-23 | 合肥国轩高科动力能源有限公司 | A kind of cathode size preparation method reducing lithium ion battery expansion |
| CN106784609A (en) * | 2017-03-10 | 2017-05-31 | 江西佳沃新能源有限公司 | A kind of cathode of lithium battery blank preparation technicses |
| CN107744767A (en) * | 2017-10-10 | 2018-03-02 | 中航锂电（江苏）有限公司 | A kind of lithium ion battery anode glue size process for dispersing |
| CN108067106A (en) * | 2016-11-16 | 2018-05-25 | 深圳格林德能源有限公司 | Pulp of lithium ion battery is pre-mixed dispersing technology for glue |
| CN109950485A (en) * | 2019-03-08 | 2019-06-28 | 安徽泰能新能源科技有限公司 | A kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, battery cathode and lithium ion battery |
| CN111672392A (en) * | 2020-05-29 | 2020-09-18 | 惠州亿纬创能电池有限公司 | Lithium ion battery cathode homogenizing process |
| CN111816878A (en) * | 2020-07-22 | 2020-10-23 | 骆驼集团新能源电池有限公司 | Stirring method for lithium ion battery cathode slurry |
| CN112687835A (en) * | 2020-12-25 | 2021-04-20 | 惠州亿纬创能电池有限公司 | Preparation method of negative electrode slurry |
| CN112885983A (en) * | 2021-01-14 | 2021-06-01 | 天能帅福得能源股份有限公司 | Lithium ion battery positive electrode slurry homogenizing method |
-
2022
- 2022-08-12 CN CN202210971367.2A patent/CN115138231A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000012001A (en) * | 1998-04-21 | 2000-01-14 | Japan Energy Corp | Manufacture of slurry for lithium secondary battery electrode |
| WO2016169289A1 (en) * | 2015-04-20 | 2016-10-27 | 田东 | Method for preparing lithium ion battery negative electrode slurry |
| CN106159266A (en) * | 2016-08-31 | 2016-11-23 | 合肥国轩高科动力能源有限公司 | A kind of cathode size preparation method reducing lithium ion battery expansion |
| CN108067106A (en) * | 2016-11-16 | 2018-05-25 | 深圳格林德能源有限公司 | Pulp of lithium ion battery is pre-mixed dispersing technology for glue |
| CN106784609A (en) * | 2017-03-10 | 2017-05-31 | 江西佳沃新能源有限公司 | A kind of cathode of lithium battery blank preparation technicses |
| CN107744767A (en) * | 2017-10-10 | 2018-03-02 | 中航锂电（江苏）有限公司 | A kind of lithium ion battery anode glue size process for dispersing |
| CN109950485A (en) * | 2019-03-08 | 2019-06-28 | 安徽泰能新能源科技有限公司 | A kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, battery cathode and lithium ion battery |
| CN111672392A (en) * | 2020-05-29 | 2020-09-18 | 惠州亿纬创能电池有限公司 | Lithium ion battery cathode homogenizing process |
| CN111816878A (en) * | 2020-07-22 | 2020-10-23 | 骆驼集团新能源电池有限公司 | Stirring method for lithium ion battery cathode slurry |
| CN112687835A (en) * | 2020-12-25 | 2021-04-20 | 惠州亿纬创能电池有限公司 | Preparation method of negative electrode slurry |
| CN112885983A (en) * | 2021-01-14 | 2021-06-01 | 天能帅福得能源股份有限公司 | Lithium ion battery positive electrode slurry homogenizing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024098419A1 (en) * | 2022-11-11 | 2024-05-16 | 宁德时代新能源科技股份有限公司 | Preparation method for positive electrode slurry, secondary battery, battery pack and electrical apparatus |
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Application publication date: 20221004 |