Cylinder type lithium ion battery with high power rate and high safety performance

A lithium-ion battery, safety performance technology, applied in the direction of battery electrodes, secondary batteries, active material electrodes, etc., can solve few problems such as battery design structure optimization and improvement, achieve significant practical value and economic benefits, simple structure, Effects of improving magnification performance and safety performance

Inactive Publication Date: 2008-07-23
TIANJIN LISHEN BATTERY
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, people are researching more on the improvement of the electronic conductivity of raw materials, especially for the olivine structure LiFePO with lower electronic conduct

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
  • Cylinder type lithium ion battery with high power rate and high safety performance
  • Cylinder type lithium ion battery with high power rate and high safety performance
  • Cylinder type lithium ion battery with high power rate and high safety performance

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1

[0026] Spinel (LiMn 2 O 4 ) As the positive electrode active material, acetylene black is the conductive agent, and polyvinylidene fluoride (PVDF) is the binder. According to the ratio of 94:3:3, mix the three evenly and add 100 parts of N-methylpyrrolidone (NMP) to make a paste, evenly spread it on a 20μm thick aluminum foil and dry it, finally roll it to 136μm, and cut it. A strip of 56×782 mm was formed to obtain a positive electrode sheet. Based on the current collector, weld a positive lug to the middle of the pole piece, and paste the protective tape.

[0027] Mix the graphite powder of the negative electrode active material, the conductive agent acetylene black and the adhesive polyvinylidene fluoride in a ratio of 90:4:6, and add 100 parts of N-methylpyrrolidone (NMP) to mix evenly into a paste, and evenly coat it on 15μm On a thick copper foil and dried, finally rolled into 81μm, cut into a 58×822mm long strip, to obtain a negative electrode sheet, base...

Example Embodiment

[0030] Example 2

[0031] LiFePO with olivine structure 4 As the positive electrode active material, acetylene black is a conductive agent, and polyvinylidene fluoride (PVDF) is a binder. Mix the three evenly according to the ratio of 92:4:4 and add 100 parts of N-methylpyrrolidone (NMP) to mix evenly into a paste, evenly spread on a 20μm thick aluminum foil and dry, and finally roll it to 138μm, and cut A strip of 56×750 mm is obtained to obtain a positive electrode sheet, and a positive electrode lug is welded to the middle position of the electrode sheet and a protective tape is pasted.

[0032] Mix the graphite powder of the negative electrode active material, the conductive agent acetylene black and the adhesive vinylidene fluoride in a ratio of 90:4:6, add 100 parts of N-methylpyrrolidone (NMP) and mix evenly into a paste, and evenly coat it in a thickness of 15μm On the copper foil and dried, and finally rolled into 91μm, cut into a 58×810mm long strip to obtain the negativ...

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
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a circular lithium ion battery with high multiplying power and high safety, which is characterized in adopting LiMn2O4 or LiFePO4 as active materials of positive plate, adopting aqueous polyethylene oxide and oily polyvinylidene fluoride as agglomerant of the positive plate, wherein current collector of the positive plate is aluminum foil whose the thickness is 10-30 mum, adopting aluminum ear whose the thickness is 0.07-0.2mm as a positive ear, adopting the positive ear as the positive plate which is located in center corresponding the current collector, adopting graphitic carbon material as active material of a cathode plate, adopting aqueousbutadiene styrene rubber and oily polyvinylidene fluoride as the agglomerant, current collector of the cathode is clutch gold whose the thickness is 10-30 mum, adopting copper or nickel cathode ear whose the thickness is 0.07-0.20mm as cathode ear, two electrode ears of the cathode are respectively positioned on quarter and three quarter position of the cathode plate. Compared with the traditional positive and cathode plate which adopts structure design of monopole ear, the invention is capable of dramatically reducing internal resistance, improving multiplying power property and safety property of the battery, and having simple structure, rational design and reliable performance.

Description

technical field [0001] The invention relates to a lithium ion battery, in particular to a cylindrical lithium ion battery with high rate and high safety performance. Background technique [0002] Because lithium-ion batteries have the advantages of high average output voltage, large specific energy, stable discharge voltage, and long working life, lithium-ion batteries have been widely used in the fields of mobile phones, notebook computers, and cameras. The further development of lithium-ion batteries is the development of power applications, which require good performance of high-current charging and discharging and higher power. As we all know, batteries suitable for high-current discharge require batteries to have low internal resistance. This is because on the one hand, the large internal resistance causes the internal temperature of the battery to rise sharply, which brings safety hazards and accelerates battery performance decline. In addition, due to the ohmic voltag...

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): H01M10/40H01M4/58H01M4/48H01M4/62H01M4/64H01M4/02H01M2/14H01M10/0525H01M50/534
CPCY02E60/10
Inventor 金慧芬高俊奎滕彦梅张绍丽
Owner TIANJIN LISHEN BATTERY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap