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

Multi-layer mesh current collector of lithium ion battery and manufacturing method of multi-layer mesh current collector

A lithium ion battery and manufacturing method technology, applied in battery electrodes, secondary batteries, electrode carriers/current collectors, etc., can solve the problem of low tensile strength of two-dimensional flat foils, easy to break the production efficiency of enterprises, limit lithium Electronic battery energy density and other issues, to achieve the effect of improving electrochemical performance, reducing internal resistance, and increasing the amount of dressing

Pending Publication Date: 2022-03-01
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The tensile strength of the two-dimensional planar foil is low, which requires high equipment precision, and is prone to problems such as broken belts during the production process that affect the production efficiency of the enterprise;
[0004] 2. The amount of active material coated on the two-dimensional foil plane is restricted, which limits the energy density of lithium-ion batteries

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
  • Multi-layer mesh current collector of lithium ion battery and manufacturing method of multi-layer mesh current collector
  • Multi-layer mesh current collector of lithium ion battery and manufacturing method of multi-layer mesh current collector
  • Multi-layer mesh current collector of lithium ion battery and manufacturing method of multi-layer mesh current collector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A multilayer mesh current collector for a lithium ion battery, comprising a substrate, an adhesive layer arranged on both sides of the substrate, and a mesh current collector layer connected to the surface of the adhesive layer, wherein the substrate is a PET film, the adhesive The adhesive layer is cured by PVDF adhesive. The mesh current collector layer is composed of mesh aluminum current collector with a mesh number of 50. The thickness of the substrate is 8 μm, the thickness of the adhesive layer is 1 μm, and the mesh current collector layer. The thickness is 20 μm.

[0026] The manufacturing method of the above-mentioned lithium-ion battery multilayer mesh current collector comprises:

[0027] S1. Apply the adhesive on both sides of the substrate by printing and coating with an anilox roller, dry and solidify in a suspension oven to form an adhesive layer, wherein the adhesive is composed of PVDF and solvent NMP in a mass ratio of 1:11.5;

[0028] S2. Hot-pressin...

Embodiment 2

[0031] A multilayer mesh current collector for a lithium ion battery, comprising a substrate, an adhesive layer arranged on both sides of the substrate, and a mesh current collector layer connected to the surface of the adhesive layer, wherein the substrate is a PET film, the adhesive The adhesive layer is cured by PVDF adhesive. The mesh current collector layer is composed of mesh copper current collector with a grid mesh number of 50. The thickness of the substrate is 8 μm, the thickness of the adhesive layer is 1 μm, and the mesh current collector layer The thickness is 20 μm.

[0032] The manufacturing method of the above-mentioned lithium-ion battery multilayer mesh current collector comprises:

[0033] S1. Apply the adhesive on both sides of the substrate by printing and coating with an anilox roller, dry and solidify in a suspension oven to form an adhesive layer, wherein the adhesive is composed of PVDF and solvent NMP in a mass ratio of 1:11.5;

[0034] S2. Hot-press...

Embodiment 3

[0037] A lithium-ion battery comprising a positive electrode sheet, a negative electrode sheet, a diaphragm, an electrolyte and a casing, wherein the positive electrode sheet includes the multilayer mesh current collector in Example 1 and the active positive electrode coated on the above-mentioned multilayer mesh collector Materials; the negative electrode sheet includes the multilayer mesh current collector in Example 2 and the negative electrode active material coated on the multilayer mesh current collector.

[0038] Among them, the positive electrode active material is composed of lithium iron phosphate, binder and conductive agent, wherein the binder is PVDF, and the conductive agent is composed of superconducting carbon black (SP) and graphene. According to the mass ratio, lithium iron phosphate: SP : Graphene: PVDF=96.8:0.7:0.5:2.0; Negative electrode active material is made up of artificial graphite, thickener, binding agent and conductive agent, and wherein thickener i...

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 discloses a multi-layer mesh current collector of a lithium ion battery. The multi-layer mesh current collector comprises a base material, adhesive layers arranged on two surfaces of the base material, and mesh current collector layers connected with the surfaces of the adhesive layers. The invention also discloses a manufacturing method of the multi-layer mesh current collector of the lithium ion battery. The multi-layer net-shaped current collector can effectively improve the tensile strength of the current collector of the lithium battery, reduce the manufacturing cost, effectively improve the energy density of the lithium battery, reduce the internal resistance of the battery and improve the electrochemical performance of the lithium battery.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery current collector manufacturing, in particular to a lithium-ion battery multilayer mesh current collector and a manufacturing method thereof. Background technique [0002] With energy problems and higher carbon emission standards, the market demand for lithium-ion batteries is increasing year by year, and the electrical performance requirements for lithium-ion batteries are getting higher and higher; currently, most lithium battery manufacturers use battery current collectors of Two-dimensional planar foils mainly have the following problems: [0003] 1. The tensile strength of the two-dimensional planar foil is low, which requires high equipment precision, and is prone to problems such as broken belts during the production process that affect the production efficiency of the enterprise; [0004] 2. The amount of active material coated on the two-dimensional foil plane is restricted, ...

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): H01M4/66H01M4/74H01M10/0525
CPCH01M4/667H01M4/661H01M4/74H01M10/0525Y02E60/10
Inventor 吴道军叶志林陈默
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