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

Battery pole piece and cell

A battery pole piece, pole piece technology, applied in battery electrodes, electrode carriers/current collectors, secondary batteries, etc., to achieve the effect of improving battery safety performance and reducing battery weight

Active Publication Date: 2019-07-26
NINGDE AMPEREX TECH
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the metal layers on the two surfaces of the composite current collector are not electrically conductive, the traditional multi-tab transfer welding structure cannot be used to realize the electrical connection between the internal multi-layer tab and the external tab.

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
  • Battery pole piece and cell
  • Battery pole piece and cell
  • Battery pole piece and cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A positive current collector is composed of PET with a thickness of 12um as the polymer layer and Al with a thickness of 0.5um as the metal layer. The positive electrode active material lithium cobaltate (LiCoO2), conductive carbon black (Super P), and polyvinylidene fluoride (PVDF) were mixed according to a weight ratio of 97.5:1.0:1.5, and N-methylpyrrolidone (NMP) was added as a solvent. Prepare a slurry with a solid content of 0.75 and stir evenly. The slurry was evenly coated on the positive electrode current collector, leaving a 15 cm blank area on both sides of the positive electrode current collector. After the coating is completed, it is dried and cold pressed. By adjusting the parameters of laser die-cutting and cutting off the redundant empty foil area, five pole pieces with a width of 10mm and lengths of 14mm, 12mm, 10mm, 8mm and 6mm were obtained.

[0048] Using copper foil as the negative electrode current collector, mix the negative electrode active mat...

Embodiment 2

[0051] A positive current collector is composed of PET with a thickness of 12um as a polymer layer and Al with a thickness of 1.0um as a metal layer. The positive electrode active material lithium cobaltate (LiCoO2), conductive carbon black (Super P), and polyvinylidene fluoride (PVDF) were mixed according to a weight ratio of 97.5:1.0:1.5, and N-methylpyrrolidone (NMP) was added as a solvent. Prepare a slurry with a solid content of 0.75 and stir evenly. The slurry was evenly coated on the positive electrode current collector, leaving a 15 cm blank area on both sides of the positive electrode current collector. After the coating is completed, it is dried and cold pressed. By adjusting the parameters of laser die-cutting and cutting off the redundant empty foil area, five pole pieces with a width of 10mm and lengths of 14mm, 12mm, 10mm, 8mm and 6mm were obtained.

[0052] Using copper foil as the negative electrode current collector, mix the negative electrode active materia...

Embodiment 3

[0055] A positive current collector is composed of PET with a thickness of 12um as the polymer layer and Al with a thickness of 0.5um as the metal layer. The positive electrode active material lithium cobaltate (LiCoO2), conductive carbon black (Super P), and polyvinylidene fluoride (PVDF) were mixed according to a weight ratio of 97.5:1.0:1.5, and N-methylpyrrolidone (NMP) was added as a solvent. Prepare a slurry with a solid content of 0.75 and stir evenly. The slurry was evenly coated on the positive electrode current collector, leaving a 15 cm blank area on both sides of the positive electrode current collector. After the coating is completed, it is dried and cold pressed. By adjusting the parameters of laser die-cutting and cutting off the redundant empty foil area, five pole pieces with a width of 10mm and lengths of 14mm, 13mm, 12mm, 11mm and 10mm were obtained.

[0056] Using copper foil as the negative electrode current collector, mix the negative electrode active m...

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
Widthaaaaaaaaaa
Login to View More

Abstract

Embodiments of the invention relate to a battery pole piece and a cell. The battery pole piece according to an embodiment comprises a pole piece body having a length direction and a width direction perpendicular to the length direction, and a plurality of tabs connected to the pole piece body, wherein each of the plurality of tabs has a width in the width direction, and a length in the length direction, wherein the widths or lengths of the tabs are different. According to the battery pole piece and the cell provided by the embodiments of the invention, the battery safety performance is improved, the battery weight can be reduced, and it is guaranteed that each tab in the battery pole piece can be electrically communicated with the outside well.

Description

technical field [0001] The embodiments of the present application relate to the field of batteries, in particular to battery pole pieces and battery cells. Background technique [0002] Lithium-ion batteries have been widely used in various electronic products and electric vehicles due to their advantages such as large specific energy, high working voltage, low self-discharge rate, small size and light weight. As the market's requirements for battery safety performance continue to increase, it is not only necessary to ensure that the battery has no potential safety hazards during normal use, but also to ensure that the battery does not ignite, burn or explode after being subjected to various damages such as violent impacts and punctures. . [0003] Traditional lithium-ion batteries usually use metal foils such as copper foil, aluminum foil, and nickel foil to make current collectors for electronic conduction. However, the safety performance of this lithium-ion battery is n...

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): H01M2/26H01M4/66H01M4/80H01M4/131H01M10/0525H01M10/0587H01M50/531H01M50/534H01M50/536H01M50/538
CPCH01M4/667H01M4/661H01M4/80H01M4/131H01M10/0525H01M10/0587H01M50/538H01M50/536H01M50/534Y02E60/10Y02P70/50H01M10/0431
Inventor 李翔王慧鑫胡乔舒张益博
Owner NINGDE AMPEREX TECH
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