Method for assessing settleability and uniformity of lithium ion battery cathode slurry

A lithium-ion battery and negative electrode material technology, applied in the direction of weighing by removing certain components, can solve problems such as unevenness, poor consistency of coated pole pieces, and sedimentation

Active Publication Date: 2013-01-02
SHENZHEN DYNANONIC
View PDF9 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Especially in today's period when new energy vehicles are attracting much attention, lithium-ion batteries are more and more widely used; the preparation method of lithium-ion battery negative electrode material slurry is to use the main components, such as graphite, conductive agent, binder, Solvents are added to the mixer in turn. Due to the large differences in physical properties such as specific gravity and specific surface among various materials, it is difficult to prepare the lithium-ion battery negative electrode material slurry uniformly even if it is pre-mixed with a mixer, and sedimentation and unevenness are prone to occur. As a result, the consistency of the coated pole piece is very poor, resulting in inconsistent internal resistance inside the cell, which in turn affects the p...

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
  • Method for assessing settleability and uniformity of lithium ion battery cathode slurry
  • Method for assessing settleability and uniformity of lithium ion battery cathode slurry
  • Method for assessing settleability and uniformity of lithium ion battery cathode slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The components of a lithium titanate slurry, a negative electrode material for lithium ion batteries, are shown in Table 1, and its theoretical solid content is 42.00%.

[0035] Table 1 Lithium titanate slurry composition list of lithium ion battery anode material

[0036] Element

lithium titanate

conductive agent

binder

solvent

Proportion (%)

49.00

2.00

4.00

45.00

[0037]A method for evaluating the settling and uniformity of lithium-ion battery negative electrode material lithium titanate slurry, comprising the following steps:

[0038] (1) Take lithium titanate slurry, the negative electrode material of lithium ion battery, and stir it evenly. Take 3 samples randomly from different positions in the slurry tank, namely A, B, and C. Mark the samples and perform centrifugation at a speed of 500rmp , the centrifugation time is 8min;

[0039] (2) Divide the three centrifuged samples into upper and lower sam...

Embodiment 2

[0051] A lithium ion battery negative electrode material graphite slurry components are shown in Table 3, and its theoretical solid content is 45.00%.

[0052] Table 3 Components of graphite slurry for lithium-ion battery anode materials

[0053] Element

graphite

conductive agent

binder

solvent

Proportion (%)

44.00

2.00

4.00

50.00

[0054] A method for evaluating the settling and uniformity of lithium-ion battery negative electrode material graphite slurry, comprising the following steps:

[0055] (1) Take the graphite slurry of lithium-ion battery negative electrode material, stir it evenly, randomly take 3 samples from different positions of the slurry barrel, namely A, B, and C, mark the samples and perform centrifugation at a centrifugal speed of 1000rmp. The time is 10 minutes;

[0056] (2) Divide the three centrifuged samples into upper and lower samples according to the volume, which are A 1 、A 2 , B 1...

Embodiment 3

[0069] A lithium ion battery negative electrode material graphite slurry components are shown in Table 5, and its theoretical solid content is 40.00%.

[0070] Table 5 Components of graphite slurry for lithium-ion battery anode materials

[0071] Element

graphite

conductive agent

binder

solvent

Proportion (%)

46.00

2.00

4.00

48.00

[0072] A method for evaluating the settling and uniformity of lithium-ion battery negative electrode material graphite slurry, comprising the following steps:

[0073] (1) Take the graphite slurry of lithium-ion battery negative electrode material, stir it evenly, randomly take 3 samples from different positions of the slurry barrel, namely A, B, and C, mark the samples and perform centrifugation at a centrifugal speed of 2000rmp. The time is 5 minutes;

[0074] (2) Divide the three centrifuged samples into upper and lower samples according to the volume, which are A 1 、A 2 , B 1 ...

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

No PUM Login to view more

Abstract

The invention discloses a method for assessing settleability and uniformity of lithium ion battery cathode slurry. The method comprises the following steps of taking samples from different positions of lithium ion battery cathode slurry, detecting solid contents of upper and lower layers in a centrifuge tube by a centrifugation method and assessing settleability and uniformity of the lithium ion battery cathode slurry according to relative standard deviation of the solid contents. The method has the advantages of simple processes, convenient operation, good reappearance, accurate data and high analysis efficiency and can be widely used in industries.

Description

technical field [0001] The invention relates to the field of lithium ion battery manufacturing, in particular to a method for evaluating the sedimentation and uniformity of the negative electrode material slurry of the lithium ion battery. Background technique [0002] Especially in today's period when new energy vehicles are attracting much attention, lithium-ion batteries are more and more widely used; the preparation method of lithium-ion battery negative electrode material slurry is to use the main components, such as graphite, conductive agent, binder, Solvents are added to the mixer in turn. Due to the large differences in physical properties such as specific gravity and specific surface among various materials, it is difficult to prepare the lithium-ion battery negative electrode material slurry uniformly even if it is pre-mixed with a mixer, and sedimentation and unevenness are prone to occur. As a result, the consistency of the coated pole piece is very poor, result...

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): G01N5/04
Inventor 尚伟丽孔令涌黄永侃
Owner SHENZHEN DYNANONIC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap