Supercharge Your Innovation With Domain-Expert AI Agents!

Method for accelerating curing of lithium battery diaphragm

A lithium battery separator and accelerated aging technology, used in secondary batteries, electrochemical generators, battery pack components, etc. Effects of variables, reduction of wavy edge depth, optimization of aging environment

Pending Publication Date: 2022-01-14
SINOMA LITHIUM BATTERY SEPARATOR CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the current lithium battery diaphragm product has a long aging time and a large deformation amount, and it is necessary to reduce the aging time and the deformation amount through a rapid aging method.
Provide a method for accelerating the aging of lithium battery separators to solve the problems of long aging time and large deformation of existing products

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 accelerating curing of lithium battery diaphragm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] S1. Wrap the surface of the tube core with an outer diameter of 600mm with foam cotton cushioning material (EVA material), and roll the diaphragm with a width of 4000mm for the first time;

[0020] S2. Place the diaphragm wound in step S1 in an environment with a temperature of 43-45° C. and a humidity of 40%-45% for 2 hours for curing;

[0021] S3, the film processed in step S2 is slitting and rewinding, the outer diameter of the rewinding tube core is 203mm, and wrapping foam cotton cushioning material (EVA material);

[0022] S4. Put the separator wound up in step S3 into an environment with a temperature of 46-48° C. and a humidity of 30%-35% for 3 hours for curing.

Embodiment 2

[0024] S1. Wrap the surface of the tube core with an outer diameter of 600mm with foam cotton cushioning material (EVA material), and roll the diaphragm with a width of 4000mm for the first time;

[0025] S2. Place the diaphragm wound in step S1 in an environment with a temperature of 48-50° C. and a humidity of 30%-35% for 3 hours for curing;

[0026] S3, the film processed in step S2 is slitting and rewinding, the outer diameter of the rewinding tube core is 203mm, and wrapping foam cotton cushioning material (EVA material);

[0027] S4. Put the separator wound up in step S3 into an environment with a temperature of 50-52° C. and a humidity of 20%-25% for 4 hours for curing.

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 accelerating curing of a lithium battery diaphragm. The method comprises the following steps of S1, rolling the diaphragm for the first time by using a large tube core wrapped with a buffer material before slitting, S2, performing high-temperature rapid curing treatment on the rolled diaphragm in the step S1 for the first time, S3, enabling the diaphragm obtained after curing treatment to be subjected to slitting and rolling, and S4, carrying out second high-temperature rapid curing treatment on the diaphragm rolled in the step S3. According to the process method for quickly curing the diaphragm, internal stress release can be accelerated, the curing time is shortened, and the deformation after curing is reduced, namely the depth of a wavy edge is reduced. According to the rapid curing method for the diaphragm, the curing environment is optimized on the basis of following the process route of traditional diaphragm preparation, and existing equipment and production lines do not need to be adjusted.

Description

technical field [0001] The invention belongs to the technical field of production and preparation of lithium batteries, and in particular relates to a method for accelerated aging of a lithium battery diaphragm. Background technique [0002] The lithium battery separator is a key component of the lithium battery. The main function of the separator is to separate the positive and negative electrodes inside the battery to prevent the short circuit caused by the contact between the positive and negative electrodes. At the same time, it has good ion passing ability; the performance of the separator determines the battery. Internal resistance, cycle, capacity, safety and other properties. At present, the mainstream diaphragm material in the market is polyolefin (polyethylene, polypropylene) material (also known as base film). In order to further improve the safety characteristics of high-power lithium-ion batteries, a layer of inorganic Coatings such as boehmite, alumina, etc. (...

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): H01M10/0525H01M50/403H01M50/417
CPCH01M50/403H01M50/417H01M10/0525Y02E60/10
Inventor 吴奇阳白耀宗刘杲珺张绪杰董秋春何健朱滕辉
Owner SINOMA LITHIUM BATTERY SEPARATOR CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com