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

Safety lithium-ion electric core

A technology of lithium-ion and battery cells, which is applied in the field of lithium-ion secondary batteries and can solve problems such as low thermal shrinkage

Inactive Publication Date: 2006-04-12
XIAN DINASI SCI & TECH
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the fact that it is difficult for existing separators to meet all the above-mentioned stringent performance requirements, it is hoped to develop a separator that takes into account the above-mentioned performances and has a low thermal shrinkage rate (less than 5% in MD and TD directions) in the high-temperature range to prevent positive and negative electrodes from Physically short-circuited microporous separator layer

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] Material formula: Kynar 2801: 15 parts; dibutyl phthalate (DBP) 30 parts; N,N-dimethylacetamide: 55 parts.

[0018] processing methods:

[0019] First, disperse and mix Kynar 2801 and N,N-dimethylacetamide in a vacuum stirred tank for 1-2 hours to prepare a uniform glue; then add dibutyl phthalate to disperse and mix for 1-2 hours , prepared into a uniform glue solution; apply the degassed glue solution on the side of the unwelded tab of the positive electrode piece and the negative electrode piece after rolling, and immerse the solvent in a methanol bath after the solvent is evaporated and dried. After the solvent is volatilized and dried, the positive and negative electrodes of the cell with a microporous layer are obtained; the positive electrode, polyolefin diaphragm, and negative electrode are wound into rolls, stuffed into a stainless steel shell, and the explosion-proof cover is welded in sequence , after vacuum drying, liquid injection, chemical formation and s...

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

This invention relates to a safety Li ionic battery chip, the positive or negative pole plate of said chip is coated with a PVDF microporous layer with low thermal shrinkage rate having good solution absorption ability and an anti-thermal shrinkage function, which can increase the electrochemical and safety property of the chip.

Description

technical field [0001] The present invention relates to lithium ion secondary batteries. technical background [0002] Lithium-ion secondary batteries have the advantages of high working voltage and high energy density, and are widely used in electronic products such as mobile phones and notebook computers. [0003] Due to the use of an organic electrolyte with a high decomposition voltage, there may be a danger of fire or explosion when the battery is overcharged, internal or external short-circuited, etc. In order to ensure the electrochemical performance and safety of the battery, the battery is usually designed as an external battery. The mode of protecting the electronic circuit, despite this, the protection of the electronic circuit still sometimes fails, and the battery itself has a certain safety design, such as the use of high-strength polyolefin microporous membrane with thermal shutdown function, which will accidentally generate heat inside When the current is me...

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): H01M10/38H01M10/40H01M2/00H01M2/14C08J5/00C08J9/00H01M10/0525H01M50/403H01M50/426H01M50/491
CPCY02E60/122Y02E60/10
Inventor 李鑫肖久梅曹东亮李雪坎
Owner XIAN DINASI SCI & TECH