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

Lithium-ion battery electrode pole piece, pole piece rolling device and lithium-ion battery

A technology for lithium-ion batteries and electrode pole pieces, applied in battery electrodes, non-aqueous electrolyte battery electrodes, electrode rolling/calendering, etc., to achieve the effects of facilitating penetration and diffusion, increasing migration rate, and improving safe use

Active Publication Date: 2019-07-23
SUNWODA HUIZHOU POWER NEW ENERGY CO LTD
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a lithium-ion battery electrode pole piece, which aims to solve the negative problems caused by the use of thick active material coating pole pieces in existing high-energy-density 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
  • Lithium-ion battery electrode pole piece, pole piece rolling device and lithium-ion battery
  • Lithium-ion battery electrode pole piece, pole piece rolling device and lithium-ion battery
  • Lithium-ion battery electrode pole piece, pole piece rolling device and lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] refer to figure 1 and figure 2 , the embodiment of the present invention proposes a lithium-ion battery electrode pole piece, including: a current collector 3 and an active material coating 1; the active material coating 1 is evenly coated on both sides of the current collector, and the active material on both sides Grooves 2 are uniformly distributed symmetrically on the surface of coating 1 .

[0027] In the prior art, some improvement schemes have been adopted to improve the negative impact on the battery caused by the coating of thick pole pieces, but there are still many deficiencies in the prior art, such as the pore-forming agent added to the slurry has high temperature and volatile characteristics, If the temperature is not properly controlled during the coating, baking and drying process, the pore-f...

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 an electrode pole plate of a lithium ion battery. The electrode pole plate comprises a current collector and active substance coating layers, wherein the active substance coating layers are uniformly coated at two sides of the current collector, and grooves are symmetrically and uniformly formed in surfaces of the active substance coating layers at two sides. A thick pole plate with specially-shaped grooves in a surface are prepared, the electrolyte retention quantity in the battery can be remarkably increased, and long-term recycle of the battery is promoted; moreover, the specially-shaped grooves are uniformly formed in the surface of the thick pole plate, electrolyte penetration and diffusion are facilitated, and the rate charge-discharge electrochemical performance of the battery is improved; and meanwhile, the specially-shaped grooves are uniformly formed in the surface of the thick pole plate, thus, the specific area of the pole plate is expanded, the polarization current density of the battery during the charge-discharge process is reduced, a lithium precipitation risk of a large-current charging positive electrode separator is improved, and the application safety of the battery is improved.

Description

technical field [0001] The invention relates to the field of new energy, in particular to a lithium ion battery electrode pole piece, a pole piece rolling device and a lithium ion battery. Background technique [0002] With the vigorous promotion of new energy vehicles, the demand for power batteries is increasing day by day. In particular, the desire for high-energy, high-safety, and long-cycle-life lithium-ion power batteries is particularly prominent. High energy density lithium-ion power batteries usually have: (1) high active material content per unit mass (volume space), (2) high gram capacity positive / negative electrode materials, (3) lower mass density packaging materials, etc. In recent years, many lithium battery manufacturers have increased the space occupancy ratio of the active material by increasing the coating thickness or compaction density of the active material of the pole piece, so as to achieve the purpose of increasing the overall energy density of the ...

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): H01M4/04H01M4/13H01M4/139H01M10/0525B21D1/02
CPCB21D1/02H01M4/043H01M4/0435H01M4/13H01M4/139H01M10/0525Y02E60/10
Inventor 冷利民张耀彭凌一
Owner SUNWODA HUIZHOU POWER NEW ENERGY 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