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

Low-temperature improved ternary battery and preparation method thereof

A ternary battery, low temperature technology, applied in the direction of battery electrodes, secondary batteries, battery components, etc., can solve the problems that affect the popularization and application of lithium batteries, serious internal polarization, low battery discharge rate, etc., to improve low temperature discharge ability, reduce polarization, and the effect of reasonable coating thickness

Inactive Publication Date: 2016-04-06
SHANDONG GOLDENCELL ELECTRONICS TECH
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a low-temperature environment, ternary batteries and lithium iron phosphate batteries also have the problems of severe internal polarization and low conductivity, resulting in low discharge rates and even failure to discharge electricity, which greatly affects lithium batteries. Promoted application of

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
  • Low-temperature improved ternary battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Production of positive electrode sheet: Weigh 88g nickel-cobalt lithium manganese oxide, 2gSuperC65, 2gKS-6, 2gVGCF, 2gCNTs and 4gPVDF in sequence, add NMP and stir for 2h to obtain a uniform and stable positive electrode slurry; The final positive electrode sheet is prepared by the steps of rolling, cutting and sheeting; wherein, the coating thickness of the positive electrode slurry is controlled to be 180um, and the positive electrode tab is located in the middle of the electrode sheet;

[0023] (2) Production of negative electrode sheet: Weigh 90g graphite, 2gSuperC65, 2gCNTs, 2gVGCF and 4gCMC in sequence, add water and stir for 2h to obtain a uniform and stable negative electrode slurry; The final negative electrode sheet is prepared by steps such as the following steps; wherein, the coating thickness of the negative electrode slurry is controlled to be 160um, and the two tab positions of the negative electrode are distributed at both ends of the electrode sheet...

Embodiment 2

[0028] (1) Production of positive electrode sheet: Weigh 94g nickel-cobalt lithium manganese oxide, 2.285g SuperC65, 1.142gKS-6, 2.285gVGCF, 2.285gCNTs and 2gPVDF in sequence, add NMP and stir for 2 hours to obtain a uniform and stable positive electrode slurry; Cloth, drying, roll-to-roll, slitting, and sheet-making steps to prepare the final positive electrode sheet; wherein, the coating thickness of the positive electrode slurry is controlled to be 120um, and the positive electrode lug is located in the middle of the electrode sheet;

[0029] (2) Production of negative electrode sheet: Weigh 97g graphite, 0.67gSuperC65, 0.67gCNTs, 0.67gVGCF and 1gCMC in sequence, add water and stir for 2 hours to obtain a uniform and stable negative electrode slurry; Steps such as cutting and sheeting are used to prepare the final negative electrode sheet; wherein, the coating thickness of the negative electrode slurry is controlled to be 100um, and the two tab positions of the negative elec...

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 present invention discloses a low-temperature improved ternary battery and a preparation method thereof. The present invention adopts the main technical scheme that: by controlling a preferred positive and negative formula and a coating thickness, a pole piece with an excellent processing property is obtained, and meanwhile, appropriate amounts of superconducting substances, such as Super C65, carbon nanotubes and the like, are added to improve conductivity of electrons; a PP / PE / PP three-layer compound film is used as a diaphragm, so that liquid absorbing and maintaining abilities of the battery can be improved, and a stable channel is provided for the migration of lithium ions; and electrolyte adopts a solvent with a low melting point, and meanwhile, EA is added so as to further improve the viscosity and the conductivity of the electrolyte at a low temperature, reduce a polarization phenomenon in the low temperature discharging proces of the battery to the greatest extent, and improve a low temperature discharge rate of the battery. By testing, the discharge rate of the ternary battery reaches 60-65% at a temperature of minus 40 DEG C.

Description

technical field [0001] This patent relates to the technical field of lithium-ion batteries, in particular to a low-temperature improved ternary battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high specific capacity, long cycle life, safety and reliability, and have been widely used in various digital products and portable devices. In recent years, the state has put forward the policy of developing new energy, vigorously developing green new energy, and electric vehicles powered by lithium batteries have developed rapidly. [0003] At present, the mainstream power batteries on the market mainly use lithium iron phosphate and lithium nickel cobalt manganese oxide materials as the positive electrode materials of lithium batteries. In contrast, lithium nickel cobalt manganese oxide batteries have a higher gram capacity and discharge platform than lithium iron phosphate batteries, which can provide higher batte...

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): H01M4/505H01M4/525H01M4/62H01M4/583H01M2/16H01M10/0567H01M50/417H01M50/457
CPCH01M4/505H01M4/525H01M4/583H01M4/62H01M4/621H01M4/623H01M4/625H01M10/0567H01M50/409H01M50/411Y02E60/10
Inventor 关成善宗继月李涛周会梅庆虎
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com