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

Formation method for lithium ion battery

A lithium ion battery and a chemical formation method technology, applied in the field of lithium ion battery chemical formation, can solve the problems of complex process, high energy consumption, poor stability, etc., and achieve the effects of high capacity, low energy consumption, and low expansion rate

Inactive Publication Date: 2016-08-17
CHINA AVIATION LITHIUM BATTERY LUOYANG
View PDF5 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of formation method of lithium-ion battery, thus solve the existing formation method, complicated process, high energy consumption, the SEI film uniformity of negative pole, the problem of poor stability

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
  • Formation method for lithium ion battery
  • Formation method for lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The formation method of the lithium-ion battery of this embodiment includes: charging and forming the lithium-ion battery after the liquid injection and standing at a temperature of 35°C and a vacuum of 70KPa; the charging process is divided into three stages: the first The charging current in the first stage is 0.05C, and the charging time is 2h; the charging current in the second stage is 0.1C, and the charging time is 2h; the charging current in the third stage is 0.25C, and the charging time is 2h.

Embodiment 2

[0021] The formation method of the lithium-ion battery of the present embodiment includes: charging and forming the lithium-ion battery after the liquid injection and standing at a temperature of 45°C and a vacuum of 75KPa; the charging process is divided into two stages: the first The charging current in the first stage is 0.1C, and the charging time is 2h; the charging current in the second stage is 0.2C, and the charging time is 2h.

Embodiment 3

[0023] The formation method of the lithium-ion battery of the present embodiment includes: charging and forming the lithium-ion battery after the liquid injection and standing at a temperature of 55°C and a vacuum of 80KPa; the charging process is divided into three stages: the first The charging current in the first stage is 0.05C, and the charging time is 2h; the charging current in the second stage is 0.1C, and the charging time is 2h; the charging current in the third stage is 0.25C, and the charging cut-off voltage is 3.65V.

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
Capacityaaaaaaaaaa
Capacityaaaaaaaaaa
Capacityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a formation method for a lithium ion battery. The method comprises the steps of carrying out formation on the lithium ion battery, after the lithium ion battery is filled with an electrolyte and is subjected to standing, at a temperature of 35-55 DEG C by 0.01-0.5C charging current under a vacuum-pumping condition. The method adopts high-temperature negative pressure for realizing formation; the exhaust gas generated from the internal of the battery in the formation process is exhausted in time; a uniform and stable SEI film is formed on the negative electrode of the lithium ion battery at a high-temperature environment; the battery processed by the formation method has the advantages of high capacity volatilization of active materials, low internal resistance, low expansion rate, long cycle life and long storage life, so that the product quality is improved, and the service life of the battery is prolonged; and meanwhile, the method has the advantages of short formation time, high equipment utilization ratio and low energy consumption, so that the method is an efficient formation method suitable for batch production of the lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a formation method of lithium ion batteries. Background technique [0002] Lithium-ion battery, as a new type of power supply, has the characteristics of long cycle life, high energy density, high working voltage, no memory effect and environmental protection. It has been widely used in many fields, such as electronic products, electric vehicles, communication Power supply and other fields have broad application prospects, and the market demand for lithium-ion batteries is also increasing. [0003] At present, in the production process of lithium-ion batteries, formation is an important process in the production process of lithium-ion batteries. During formation, a passivation film is formed on the surface of the negative electrode, that is, solid electrolyte film (SEI). The quality of the SEI film directly affects the battery. Electrochemical propertie...

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): H01M10/058
CPCH01M10/058Y02E60/10Y02P70/50
Inventor 徐文娟潘芳芳徐林孙敬
Owner CHINA AVIATION LITHIUM BATTERY LUOYANG
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