Unlock instant, AI-driven research and patent intelligence for your innovation.

Storage method for electrode slurry of lithium ion battery

A lithium-ion battery, electrode slurry technology, applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve the problems of increasing manufacturing costs, increasing temperature, affecting the surface density of coatings, etc., to improve production efficiency and give full play to production. Efficiency, effect of saving manufacturing cost

Active Publication Date: 2017-12-08
WANXIANG 123 CO LTD
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The method of storing lithium-ion battery slurry in the prior art is to pump the dispersed electrode slurry into the slurry storage tank, and continue to stir at a low speed under normal temperature and pressure, but this prior art has the disadvantage of short slurry storage time. Problem, the limit storage time is 72 hours
The storage method of this lithium ion battery slurry, the storage time of the electrode slurry is short, in the current large-scale production process of lithium ion batteries, it is not conducive to the connection between the pulping process and the coating process, and can not give full play to the pulping process The utilization rate of the equipment cannot guarantee the continuous production of the production line, which affects the production efficiency; during the storage of the electrode slurry, the continuous stirring directly leads to the decrease of the viscosity of the slurry; the polymer material in the slurry will last for a long time Under the action of shear force, the polymer structure will be broken, and the temperature of the slurry will increase, so that the viscosity of the slurry will continue to decrease, which will seriously affect the coating surface density in the coating process, making the coating surface density low, and even exceeding the design specifications. Scrap, increasing manufacturing costs
[0003] Chinese Patent Publication No. CN101114706A, the patent publication date is January 30, 2008, discloses a lithium ion battery electrode slurry storage tank, which uses methods such as continuous stirring and slurry pressurization to prolong the storage time of the electrode slurry , improve the utilization rate of the lithium-ion battery slurry; but as mentioned above, continuous long-term stirring will destroy the structure of the molecular material in the electrode slurry, increase the temperature of the slurry, and cause the viscosity of the slurry to drop sharply. Seriously affect the subsequent treatment process, affect the performance of the lithium battery, and even cause the produced lithium ion battery plate to be scrapped, increasing the manufacturing cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Storage method for electrode slurry of lithium ion battery
  • Storage method for electrode slurry of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A lithium ion battery electrode slurry storage method, comprising the following steps:

[0029] a) Vacuuming: pump the prepared electrode slurry into the slurry storage tank, and vacuumize to -0.1MPa;

[0030] b) Constant temperature: control the temperature of the slurry tank at 10°C;

[0031] c) Stand still: let the electrode slurry stand for 4 hours;

[0032] d) Stirring 1: stirring at a stirring speed of 20Hz for 0.5 hours;

[0033] e) stirring 2: stirring at a stirring speed of 10 Hz for 6 hours;

[0034] f) loop step c to step e;

[0035] Wherein, in steps b-e, the vacuum degree in the slurry storage tank is maintained at -0.1 MPa, in steps c-e, the temperature in the slurry storage tank is controlled at 10° C., and the stirring method in steps d and e is mechanical stirring.

Embodiment 2

[0037] A lithium ion battery electrode slurry storage method, comprising the following steps:

[0038] a) Vacuuming: pump the prepared electrode slurry into the slurry storage tank, and vacuumize to 0.1MPa;

[0039] b) Constant temperature: control the temperature of the slurry tank at 25°C;

[0040] c) Stand still: let the electrode slurry stand for 8 hours;

[0041] d) Stirring 1: stirring at a stirring speed of 25Hz for 1 hour;

[0042] e) stirring 2: stirring at a stirring speed of 15 Hz for 12 hours;

[0043] f) loop step c to step e;

[0044] Wherein, in steps b-e, the vacuum degree in the slurry storage tank is maintained at 0.1 MPa, in steps c-e, the temperature in the slurry storage tank is controlled to be 25°C, and the stirring method in steps d and e is magnetic stirring.

Embodiment 3

[0046] A lithium ion battery electrode slurry storage method, comprising the following steps:

[0047] a) Vacuuming: pump the prepared electrode slurry into the slurry storage tank, and vacuumize to -0.06MPa;

[0048] b) Constant temperature: control the temperature of the slurry tank at 15°C;

[0049] c) Stand still: let the electrode slurry stand for 4 hours;

[0050] d) Stirring 1: stirring at a stirring speed of 20Hz for 0.5 hours;

[0051] e) stirring 2: stirring at a stirring speed of 10 Hz for 6 hours;

[0052] f) loop step c to step e;

[0053] Wherein, in steps b-e, the vacuum in the slurry tank is maintained at -0.06MPa, in steps c-e, the temperature in the slurry tank is controlled to be 15°C, and the stirring method in steps d and e is mechanical stirring.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a storage method for the electrode slurry of a lithium ion battery. The storage method comprises the following steps: vacuum-pumping, constant-temperature treatment, standing, primary stirring, secondary stirring, etc. The electrode slurry is stored under vacuum constant-temperature intermittent stirring process conditions. The method provided by the invention improves the storage stability of the slurry and is beneficial for controlling the density of a coating surface in a coating procedure; the stability of manufacturing and production efficiency are improved, the scrap rate in the coating procedure is lowered, and manufacturing cost is saved; and a slurrying procedure and the coating procedure are effectively linked up so as to ensure the continuity of production and give full play to production efficiency.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery slurry, in particular to a storage method for lithium ion battery electrode slurry. Background technique [0002] The method of storing lithium-ion battery slurry in the prior art is to pump the dispersed electrode slurry into the slurry storage tank, and continue to stir at a low speed under normal temperature and pressure, but this prior art has the disadvantage of short slurry storage time. Problem, the limit storage time is 72 hours. The storage method of this lithium ion battery slurry, the storage time of the electrode slurry is short, in the current large-scale production process of lithium ion batteries, it is not conducive to the connection between the pulping process and the coating process, and can not give full play to the pulping process The utilization rate of the equipment cannot guarantee the continuous production of the production line, which affects the production ef...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01F13/08B01F13/06B01F15/00H01M4/139
CPCH01M4/139B01F33/70B01F33/45B01F35/22142Y02E60/10
Inventor 谭歌李凡群韩笑张伟
Owner WANXIANG 123 CO LTD