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

An electrolyte for improving thermal runaway resistance of lithium-ion batteries

A lithium-ion battery and electrolyte technology, applied in the field of lithium-ion batteries, can solve the problems of aggravating the hazards of safety accidents, easy to decompose, easy to burn, etc.

Active Publication Date: 2020-09-04
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrolyte solvent system is an organic carbonate with a low flash point, which is easy to decompose and burn. When the battery explodes, it will often cause violent combustion, which aggravates the hazard of safety accidents.

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
  • An electrolyte for improving thermal runaway resistance of lithium-ion batteries
  • An electrolyte for improving thermal runaway resistance of lithium-ion batteries
  • An electrolyte for improving thermal runaway resistance of lithium-ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0025] Prepare the lithium-ion battery electrolyte solution containing additives according to Examples 1-6 in Table 1, and inject the electrolyte solution into the 15Ah lithium iron phosphate lithium-ion battery with an aluminum shell. Keep the cell at 150°C, 200°C, and 300°C for 30 minutes to observe whether it is thermal runaway. The test results are shown in Table 1.

[0026] Electrolyte composition and capacity retention data of table 1 comparative example and embodiment 1-6

[0027]

[0028] It can be seen from the above table 1 that the safety performance is still not affected when the electrolyte prepared by the present invention is injected into an aluminum shell 15Ah lithium iron phosphate lithium ion battery and heated at 300°C for 30 minutes. Continue to heat up to 400 degrees and 500 degrees, the battery cells remain intact, and no thermal runaway occurs.

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 an electrolyte capable of improving the thermal runaway resistance performance of a lithium ion battery, and relates to the technical field of lithium ion batteries. The electrolyte capable of improving the thermal runaway resistance performance of the lithium ion battery is prepared by combining trimethyl phosphate, a cyclophosphazene derivative fire retardant, lithium salt and a protective agent according to a certain ratio. By means of the formula of the electrolyte, the ion transport rate can be improved, and the basic electrical performance of the lithium ion battery is improved; the electrolyte is fire-retardant or non-combustible, so that lightning and the safety of the electrolyte can be improved, and self-protection of the interior of the battery during thermal runaways can be achieved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to an electrolyte for improving the thermal runaway resistance of lithium-ion batteries. Background technique [0002] In recent years, due to the increasing requirements for environmental protection and the government's accelerated policy guidance on the development of new energy vehicles, many countries in the world have successively announced bans on the sale of fuel vehicles. Under the continuous stimulation of new energy vehicle incentive policies, the market demand has doubled. However, due to various complex application conditions, the lithium-ion battery system has potential safety hazards of explosion and combustion, which largely restricts the development of power lithium-ion batteries. While developing high energy density to meet market demand for passenger vehicles, safety is a determining factor for its large-scale use. [0003] During the working proces...

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): H01M10/0566H01M10/0569H01M10/0568H01M10/0525
CPCH01M10/0525H01M10/0566H01M10/0568H01M10/0569H01M2300/0025H01M2300/0037Y02E60/10
Inventor 叶加久厉运杰
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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