High-rate high-energy density lithium ion battery

A high-energy-density, lithium-ion battery technology, applied in battery electrodes, secondary batteries, battery pack components, etc., can solve the problem that the volume cannot be changed, so as to improve liquid retention performance, structural stability and cycle stability , Improve the effect of high temperature stability

Inactive Publication Date: 2019-10-18
无锡市明杨新能源股份有限公司
View PDF14 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Some industries require more capacity batteries to extend battery life, and the original volume cannot be changed for easy installation

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] A lithium-ion battery with high rate and high energy density, including positive electrode, negative electrode, microporous diaphragm and electrolyte, the positive electrode is formed by coating nickel-cobalt-manganese lithium oxide on aluminum foil, wherein nickel-cobalt-manganese lithium oxide in nickel-cobalt-manganese lithium oxide The ratio is 8:1:1. Increasing the nickel content can effectively improve the storage capacity of the lithium-ion battery. Compared with the high-rate discharge type 18650 lithium-ion battery on the market, the discharge capacity of the 18650 lithium-ion battery of the present invention reaches more than 2500mAh, which is 25% higher than before.

[0009] Considering the increase of the storage capacity of the battery, higher requirements must be placed on the discharge speed. The discharge rate is directly related to the conductivity of the material, so increasing the conductivity of the material will definitely increase the discharge rat...

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

No PUM Login to view more

Abstract

The invention discloses a high-rate high-energy density lithium ion battery. Through formulation optimization of a lithium nickel cobalt manganate anode material, structural stability and cycle stability of the anode material at high energy density are improved, and a nano-conductive material is filled in the middle of voids of spherical-like positive electrode particles; under the premise of notaffecting the volumetric energy density of the material, the conductivity of the material and high rate discharge characteristics of the material are both improved. Aluminum oxide coating is coated ona microporous film to improve high temperature resistance and electrolyte absorption retention performance of the microporous film, 1,3-propane sultone is utilized to improve high temperature stability of a high nickel positive electrode, the lithium dioxalate borate is added to improve oxidation resistance of the electrolyte, a stable SEI film is formed on a surface of the positive electrode, the internal hydrofluoric acid content of the battery is reduced, damage of the hydrofluoric acid to the positive electrode material is reduced, and battery performance is improved.

Description

technical field [0001] The invention relates to a lithium ion battery with high rate and high energy density. Background technique [0002] At present, the high-rate lithium-ion battery 18650 type produced in China has a maximum capacity of 2000mAh that can be continuously discharged at a current of 20A. [0003] Some industries require batteries with more capacity to extend battery life, and the original volume cannot be changed for easy installation. The design of batteries that lead to high-rate discharge requires lower material compaction density, more conductive materials, and thicker current collectors to ensure high-rate discharge performance and avoid cycle performance degradation caused by excessive temperature rise and lithium precipitation . However, high energy density batteries require higher material compaction density and less auxiliary materials to provide space for active materials. Therefore, high rate discharge characteristics and high energy density ch...

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): H01M10/0525H01M4/131H01M4/36H01M4/505H01M4/525H01M4/62H01M4/587H01M2/16H01M10/0567
CPCH01M10/0525H01M4/131H01M4/362H01M4/505H01M4/525H01M4/624H01M4/587H01M10/0567H01M50/431H01M50/411H01M50/449Y02E60/10
Inventor 钱胜利杨茜华春忠孙华申
Owner 无锡市明杨新能源股份有限公司
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