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

Low temperature oxidation curing process of secondary particles

A technology of secondary granulation and curing process, which is applied in the granulation of special adhesives, granulation in static tanks/troughs, and the method of granulating raw materials. It can solve problems such as difficult to meet application requirements and achieve excellent curing effects. , high mechanical strength and strong toughness

Active Publication Date: 2022-02-22
HUNAN SHINZOOM TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for the secondary particles that still need to be mechanically processed or high-temperature heat treated in the later stage of composite granulation, the traditional heating and curing technology is difficult to meet the application requirements

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
  • Low temperature oxidation curing process of secondary particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Feed the secondary particles ① into the cooling kettle. The cooling kettle maintains a nitrogen atmosphere, the stirring speed is 50rpm, the cooling method is cooling by circulating heat transfer oil, and the cooling speed is 120°C / min.

[0033] When the indicated temperature of the material drops to 320°C, close the feed valve and discharge valve of the circulating oil in turn; keep the cooling rate at 30°C / min, and when the temperature drops to 250°C, close the nitrogen inlet valve and open the oxygen inlet valve ; After the material is cooled to room temperature, the 1# sample can be obtained.

Embodiment 2

[0035] Feed the secondary particles ① into the cooling kettle. The cooling kettle maintains an argon atmosphere, the stirring speed is 60rpm, the cooling method is cooling by circulating heat transfer oil, and the cooling speed is 250°C / min.

[0036] When the indicated temperature of the material drops to 320°C, close the feed valve and discharge valve of the circulating oil in turn; keep the cooling rate at 30°C / min, and when the temperature drops to 250°C, close the nitrogen inlet valve and open the oxygen inlet valve ; When the material is cooled to room temperature, the 2# sample can be obtained.

Embodiment 3

[0038] Feed the secondary particles ② into the cooling kettle. The cooling kettle maintains a nitrogen atmosphere, the stirring speed is 70rpm, the cooling method is cooling by circulating heat transfer oil, and the cooling speed is 140°C / min.

[0039] When the indicated temperature of the material drops to 320°C, close the feed valve and discharge valve of the circulating oil in turn; keep the cooling rate at 30°C / min, and when the temperature drops to 250°C, close the nitrogen inlet valve and open the oxygen inlet valve ; When the material is cooled to room temperature, the 3# sample can be obtained.

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
particle sizeaaaaaaaaaa
softening pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a low-temperature oxidative solidification process of secondary particles, which transfers the hot material of the secondary particles which has just completed the granulation process from a high-temperature kettle into a cooling kettle under the protection of an inert atmosphere, and uses circulating heat conduction oil to heat the secondary particles. Cool the material, and when the temperature drops to 320~270°C, turn off the circulating heat conduction oil to let the secondary particle heat material cool down naturally; when the temperature of the secondary particle heat material cools down to 250°C, change the inert atmosphere to an oxygen atmosphere. The secondary particle hot material is oxidized and cured, and the material can be unloaded when the temperature drops to room temperature. The invention has the advantages of simple process, low energy consumption, environmental protection, strong toughness and high mechanical strength after the secondary particles are cured.

Description

technical field [0001] The invention relates to a granulation technology for negative electrode materials of lithium ion batteries, in particular to a low-temperature solidification technology for secondary particles used for negative electrode materials of lithium ion batteries. Background technique [0002] Granulation technology is a type of powder processing technology that has developed rapidly in recent years. It refers to a process of compounding single particles into secondary particles under the action of binders. It has been widely used in many fields. [0003] The granulation process can be roughly divided into three steps: mixing, granulation, and solidification. Among them, mixing is to mix the single particle with the adhesive evenly; granulation is to melt the adhesive into a liquid state at high temperature and bond the single particle into secondary particles; curing refers to curing the adhesive to ensure It no longer plastically deforms or liquefies at hi...

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 Patents(China)
IPC IPC(8): B01J2/00B01J2/10B01J2/28
CPCB01J2/00B01J2/10B01J2/28
Inventor 石磊皮涛徐燕宁舒平邵浩明
Owner HUNAN SHINZOOM TECH
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