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

Method for solving problem of air expansion of power lithium battery with cathode made of lithium titanate

A technology for lithium ion batteries and lithium titanate batteries, applied in the field of lithium ion batteries, can solve problems such as unfavorable industrial production, uneven dispersion, and reduced energy density.

Inactive Publication Date: 2011-05-11
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
View PDF7 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned methods all have certain merits, but the above-mentioned methods have higher requirements on the purity of additives or solvents, and the doping of pole pieces will bring about the problems of reduced energy density and uneven dispersion, which is not conducive to industrial production

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 solving problem of air expansion of power lithium battery with cathode made of lithium titanate
  • Method for solving problem of air expansion of power lithium battery with cathode made of lithium titanate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Using lithium manganate as the positive electrode and carbon-coated modified lithium titanate as the negative electrode, the pre-charged lithium titanate battery was kept at 80% SOC and 30°C for 7 days after the battery was made. The test results are listed in the table below:

[0029]

[0030] The results show that the lithium titanate battery treated by the method described in the present invention does not flatulence during the cycle. (wherein the thickness change rate h(%)=100×{(h 2 -h 1 ) / h 1}, h 1 represents the thickness of the battery before cycling, h 2 represents the thickness of the battery after cycling. The same below. )

Embodiment 2

[0032] With lithium manganate as the positive electrode and carbon-coated modified lithium titanate as the negative electrode, the pre-charged lithium titanate battery was kept for 2 days at a state of charge SOC of 20% and 60 °C for 2 days. The test results are listed in the table below:

[0033]

[0034] The results show that the post-lithium titanate battery treated by the method described in the present invention does not flatulence during the cycle.

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

A method for solving the problem of air expansion of a power lithium battery with an cathode made of lithium titanate comprises the following steps: 1, keeping 20 percent to 80 percent of SOC (state of charge) after precharging a finished lithium titanate battery; 2, putting the precharged lithium titanate battery in an environment with a temperature ranging form 20 DEG C below zero to 60 DEG C; and 3, keeping the precharged lithium titanate battery for 1 to 30 days. The method is applicable to lithium batteries which are made of modified lithium titanate materiak and provided with cathodes made of lithium titanate material and surfaces covered with carbon. The anode material of the lithium battery can be one or more materials in lithium manganate, lithium cobalt oxide, and lithium nickel cobalt manganese or lithium iron phosphate. The method provided by the invention solves the problem of air expansion of the power lithium battery with the cathode made of the lithium titanate, and comprises the following steps: keeping the precharged lithium titanate battery under a certain SOC and a certain temperature for a certain time, enhancing the stability of a passive film formed by a lithium titanate cathode in a precharge stage, and inhibiting the reaction between the lithium titanate cathode and electrolyte solution, so as to solve the problem of air expansion.

Description

technical field [0001] The present invention relates to a lithium ion battery, in particular to a method for solving the problem of flatulence in a power lithium ion battery using lithium titanate as a negative electrode. Background technique [0002] Due to the advantages of high specific energy, high working voltage, long cycle life, no memory effect and less pollution, lithium-ion batteries have been widely used in communication and digital products such as mobile phones, portable computers, digital cameras, and portable music players. . In recent years, the application development in the fields of power tools, electric vehicles, aerospace satellites, weapon equipment and various energy storage devices has gradually shown good prospects. [0003] At present, most of the commercialized negative electrode materials of lithium-ion batteries are lithium-intercalating carbon materials. Since the potential of the carbon electrode after lithium-intercalation is very close to th...

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): H01M10/058
CPCY02E60/10Y02P70/50
Inventor 吴可王印萍高雅雷向利吴宁宁王雅和
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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