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Lithium battery electrode slurry stirring processing method and lithium battery electrode slurry obtained by processing

A technology of electrode slurry and processing method, applied in battery electrodes, electrode manufacturing, secondary batteries, etc., can solve problems such as difficulty in stirring evenly, prolong battery cycle, and adversely affect battery performance, and achieve uniform slurry and good stability. Effect

Active Publication Date: 2018-06-15
BEIJING NAT BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process takes a long time, which will prolong the cycle of the entire battery manufacturing, and because the slurry is always stirred in a state of good fluidity, it is difficult to stir evenly, the dispersion effect is poor, and precipitation is easy to occur, which will adversely affect the performance of the battery influences

Method used

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  • Lithium battery electrode slurry stirring processing method and lithium battery electrode slurry obtained by processing
  • Lithium battery electrode slurry stirring processing method and lithium battery electrode slurry obtained by processing
  • Lithium battery electrode slurry stirring processing method and lithium battery electrode slurry obtained by processing

Examples

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Embodiment 1

[0074] A stirring processing method for lithium battery electrode slurry, comprising the following steps: (a) premixing: mixing the solvent NMP and the binder PVDF uniformly to obtain the first mixture, and mixing the active material lithium iron phosphate and the conductive agent KS-6 conductive graphite Mix well to get the second mixture;

[0075] (b) primary stirring: 25% of the first mixture and all the second mixture are mixed and stirred to obtain the third mixture, the stirring rate is 5r / min, and the stirring time is 3min;

[0076] (c) secondary stirring: mixing and stirring the remaining first mixture and all the third mixture, the stirring rate is 20r / min, and the stirring time is 15min;

[0077] (d) stirring three times: the stirring speed is 40r / min, and the stirring time is 35min;

[0078] (e) stirring four times: the stirring speed is 90r / min, and the stirring time is 15min;

[0079] (f) Stir five times: the stirring rate is 40r / min, and the stirring time is 35...

Embodiment 2

[0083] A stirring processing method for lithium battery electrode slurry, comprising the following steps: (a) pre-mixing: mixing the solvent NMP and the binder PVDF uniformly to obtain the first mixture, and mixing the active material lithium iron phosphate and the conductive agent KS-6 conductive graphite Mix well to get the second mixture;

[0084] (b) primary stirring: 35% of the first mixture and all the second mixture are mixed and stirred to obtain the third mixture, the stirring speed is 8r / min, and the stirring time is 5min;

[0085] (c) secondary stirring: mixing and stirring the remaining first mixture and all the third mixture, the stirring rate is 20r / min, and the stirring time is 3min;

[0086] (d) stirring three times: the stirring speed is 60r / min, and the stirring time is 10min;

[0087] (e) stirring four times: the stirring speed is 100r / min, and the stirring time is 20min;

[0088](f) Stir five times: the stirring rate is 60r / min, and the stirring time is 1...

Embodiment 3

[0092] A stirring processing method for lithium battery electrode slurry, comprising the following steps: (a) premixing: mixing the solvent NMP and the binder PVDF uniformly to obtain the first mixture, and mixing the active material lithium iron phosphate and the conductive agent KS-6 conductive graphite Mix well to get the second mixture;

[0093] (b) primary stirring: 50% of the first mixture and all the second mixture are mixed and stirred to obtain the third mixture, the stirring speed is 15r / min, and the stirring time is 20min;

[0094] (c) secondary stirring: mixing and stirring the remaining first mixture and all the third mixture, the stirring rate is 30r / min, and the stirring time is 10min;

[0095] (d) stirring three times: the stirring rate is 80r / min, and the stirring time is 30min;

[0096] (e) stirring four times: the stirring speed is 120r / min, and the stirring time is 50min;

[0097] (f) Stir five times: the stirring rate is 80r / min, and the stirring time is...

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Abstract

The invention relates to the field of lithium battery manufacturing, and particularly provides a lithium battery electrode slurry stirring processing method and lithium battery electrode slurry obtained by processing. The lithium battery electrode slurry stirring processing method comprises the following steps of (a) performing premixing: mixing a solvent and a bonder uniformly to obtain a first mixture, and mixing active substances and a conductive agent uniformly to obtain a second mixture; (b) performing primary stirring: mixing and stirring part of the first mixture and all of the second mixture to obtain a third mixture; (c) performing secondary stirring: mixing and stirring the rest of the first mixture and all of the third mixture; (d) performing third mixing; (e) performing fourthstirring; (f) performing fifth stirring; and circulating the steps (d)-(f). According to the processing method, the uniformity and stability of the electrode slurry in lithium battery production can be remarkably improved, and the uniformity of the next coating process can be improved, so that the controllability of the lithium ion battery production process and the consistency of product performance are improved.

Description

technical field [0001] The invention relates to the field of lithium battery manufacturing, in particular to a method for stirring and processing lithium battery electrode slurry and the processed lithium battery electrode slurry. Background technique [0002] Lithium-ion secondary batteries have become widely used power products due to their advantages such as high cell voltage, high energy and power density, long life, light weight, no memory effect, and no pollution. Its application fields mainly include various portable electronic consumer goods (such as smart phones, tablet computers, digital cameras, etc.); supporting energy storage for solar / wind power plants; electric vehicles (EV) and hybrid electric vehicles (HEV); military weapons and equipment; aerospace field Wait. Especially in recent years, with the application of electric vehicles, people have put forward higher performance requirements for lithium-ion batteries. The improvement of the performance of lithiu...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/139H01M10/0525B01F13/10
CPCH01M4/04H01M4/139H01M10/0525B01F33/82Y02E60/10
Inventor 乔乔苏凯
Owner BEIJING NAT BATTERY TECH
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