Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for detecting magnetic substances of lithium ion battery material

A technology of lithium-ion batteries and magnetic substances, which is applied in measuring devices, particle size analysis, scientific instruments, etc., can solve the problems that the polymer wear-resistant layer cannot be removed, and the magnetic substances are difficult to collect.

Inactive Publication Date: 2019-11-05
XIAMEN KNANO GRAPHENE TECH CORP
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Invention patents with application numbers 201410145221.8 and 201510694670.2 directly digest the coated polymer magnet to test the content of magnetic substances. The polymer wear-resistant layer cannot be removed, and the adsorbed magnetic substances are difficult to collect from the magnet. At the same time, there is no right size of the magnetic substance , quantity inspection and analysis

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 detecting magnetic substances of lithium ion battery material
  • Method for detecting magnetic substances of lithium ion battery material
  • Method for detecting magnetic substances of lithium ion battery material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Take 300g of graphene slurry in a 1L container, add 300g of primary water to adjust the viscosity of the solution to be tested to 3000 Pascal seconds;

[0035] 2. Put the polytetrafluoroethylene insulating layer on the magnetic rod, and the magnetic flux of the magnetic rod is 12000 gauss; stir the magnetic rod covered with the polytetrafluoroethylene insulating layer at 30 rpm / min for 30 minutes to make the magnetic rod Thoroughly extract the magnetic substances in the solution to be tested;

[0036] 3. Put the extracted magnetic rod covered with polytetrafluoroethylene isolation layer into a container filled with first-grade water, stir to clean the magnetic rod; wash 5 times until the first-grade water is clear; finally put the polytetrafluoroethylene The isolation layer is removed from the magnetic rod, and the magnetic substance is transferred to clean first-class water to obtain the dispersion to be tested;

[0037] 4. Pass the dispersion to be tested through ...

Embodiment 2

[0042] 1. Take 300g of carbon nanotube slurry in a 1L container, add 300g of nitrogen methylpyrrolidone to adjust the viscosity to 3500 Pascal s for the solution to be tested;

[0043] 2. Put the polytetrafluoroethylene insulating layer on the magnetic rod, and the magnetic flux of the magnetic rod is 12000 gauss; stir the magnetic rod covered with the polytetrafluoroethylene insulating layer at 30 rpm / min for 30 minutes to make the magnetic rod Thoroughly extract the magnetic substances in the solution to be tested;

[0044] 3. Put the extracted magnetic rod covered with polytetrafluoroethylene isolation layer into the container containing nitrogen methyl pyrrolidone, stir and clean the magnetic rod with ultrasound (30kHz); wash 6 times until the nitrogen methyl pyrrolidone Pyrrolidone is clarified; finally, the polytetrafluoroethylene insulating layer is removed from the magnetic rod, and the magnetic substance is transferred to clean nitrogen methyl pyrrolidone to obtain th...

Embodiment 3

[0049] 1. Take 300g of graphene composite slurry in a 1L container,

[0050] Add 300g nitrogen methyl pyrrolidone to adjust the viscosity to be the solution to be tested at 3200 Pascal seconds;

[0051] 2. Put the polytetrafluoroethylene isolation layer on the magnetic rod, and the magnetic flux of the magnetic rod is 12000 gauss;

[0052] Stir the solution to be tested with a magnetic rod covered with a polytetrafluoroethylene isolation layer at 45 rpm / min for 45 minutes, so that the magnetic rod can completely extract the magnetic substance in the solution to be tested;

[0053] 3. Put the extracted magnetic rod covered with polytetrafluoroethylene isolation layer into the container containing nitrogen methyl pyrrolidone, stir and clean the magnetic rod with ultrasound (30kHz); wash 6 times until the nitrogen methyl pyrrolidone Pyrrolidone is clarified; finally, the polytetrafluoroethylene insulating layer is removed from the magnetic rod, and the magnetic substance is tran...

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
magnetic fluxaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for detecting magnetic substances of a lithium ion battery material. The method comprises the following steps of extracting, washing and collecting the magnetic substances in the lithium ion battery material, and conducting analytical detection on the size and number of the collected magnetic substances by an automatic cleanliness analysis system. By adopting an existing detection method in the same field for detecting the content of the magnetic substances, the size and number of the magnetic substances are not detected or analyzed. According to the method, the automatic cleanliness analysis system is creatively applied to the analysis of the magnetic substances, and the method is an effective detection method for research hotspots in the field of lithiumelectronic batteries and is an innovation of detection methods in the field of new energy batteries.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery material detection, and in particular relates to a method for detecting magnetic substances of lithium-ion battery materials. Background technique [0002] Some magnetic substances will inevitably be introduced in the production process of lithium-ion batteries, and the control of magnetic substances is an important indicator of the safety performance of batteries, especially lithium-ion batteries. A small amount of magnetic substances will not only reduce the specific capacity and energy density of the material, but also some magnetic substances are easily dissolved in the electrolyte, causing a series of side reactions, resulting in reduced battery life, consistency and safety performance. Even metal contaminants that cannot be detected by the naked eye may cause high self-discharge, and when the magnetic particles are >5um, it is very easy to generate an internal short circuit in...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
CPCG01N15/02
Inventor 钱文枝方崇卿邱淑璇方盛强
Owner XIAMEN KNANO GRAPHENE TECH CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com