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

Lithium ion battery core and preparation method thereof

A lithium-ion battery and cell technology, which is applied in the field of new energy materials, can solve the problem that parameters such as battery internal resistance, life, energy density and capacity cannot be substantially improved, and limit the structure and shape of curly batteries, small curvature changes, etc. problems, to achieve the effect of slowing the peeling phenomenon, improving cycle stability and good protection

Active Publication Date: 2013-02-06
江苏海基新能源股份有限公司
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even with thinner electrode composite materials, small curvature changes cannot be achieved, limiting the structure and shape of battery products such as rolled batteries
The mutual constraints of these existing technologies have caused parameters such as internal resistance, life, energy density and capacity of batteries in the prior art to be substantially improved.

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
  • Lithium ion battery core and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Dissolve 7g of polyvinylidene fluoride in 180g of N-methylpyrrolidone, fully stir and dissolve to form polyvinylidene fluoride glue with a certain concentration;

[0027] (2) Dissolve 7g of polyvinylidene fluoride binder in 180g of N-methylpyrrolidone, stir and dissolve to form a colloidal solution, then add 140g of LiFePO 4and 2.8g superfine carbon powder into the colloidal solution, and stir evenly with a mixer to make a paste-like positive electrode slurry. Fill the obtained positive electrode slurry into the multi-permeable pores of the current collector with a porosity of 90% by using the scraping method. The metal foam is made of aluminum material, and the current collector filled with the positive electrode material is placed in an oven at a temperature of 110°C. Dry for 4h. Take out and die-cast with a calender, with a thickness of 300 μm, wherein the thickness is determined according to the size of the battery. The die-cast material was calcined at 700° C...

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
porosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a lithium ion battery core and a preparation method thereof. The lithium ion battery core comprises a current collector, anode or cathode material, carbonizing medium, diaphragm composite material and porous polymer glue. The preparation method comprises the following steps: mixing and filling bonding agent, electrode material and conducting agent in the multi-penetration hole of the current collector; drying, die-casting and calcining; coating the porous polymer glue on the surface of the current collector after cooling; drying to obtain anode or cathode composite material; coating the porous polymer glue on the surface of the diaphragm composite material; drying; overlapping and casting the porous polymer glue, the anode or cathode composite material and the porous polymer glue to obtain the lithium ion battery core. Through adopting the above manner, according to the lithium ion battery core and the preparation method thereof provided by the invention, the cyclical stability is improved, the lithium ion battery core has better mechanical property and bending-resistant performance, the stripping phenomenon of electrode material is efficiently retarded, the communication and the electric conduction between electrode materials and isolated layers are promoted, each surface of the electrode layer is well protected, and the service life of the battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of new energy materials, in particular to a lithium-ion battery cell and a preparation method thereof. Background technique [0002] The lithium-ion battery cell includes at least one layer of positive electrode material and negative electrode material. The positive electrode material and the negative electrode material are connected by a separator, which is generally obtained by coating the electrode material on the metal foil of the current collector through an adhesive. The disadvantage of this preparation method is that the bonding surface between the electrode material and the traditional current collector is relatively weak, the mechanical reliability is reduced, and the two are prone to separation, which limits the bending rate of the electrode material. Electrode materials cannot be fully utilized, and high-density composite materials cannot be obtained, resulting in reduced capacity, increased inter...

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): H01M10/0525H01M4/13H01M2/16H01M10/058
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 成信刚
Owner 江苏海基新能源股份有限公司
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