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

Power lithium battery deterioration degree diagnosis method based on AC impedance

A technology of AC impedance and diagnostic method, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of lack of AC impedance, evaluating the state of charge of the battery, etc., to achieve the effect of improving the utilization rate and prolonging the service life

Inactive Publication Date: 2015-04-08
STATE GRID CORP OF CHINA +3
View PDF6 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the industry still lacks methods for evaluating battery state of charge and deterioration by using AC impedance.

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
  • Power lithium battery deterioration degree diagnosis method based on AC impedance
  • Power lithium battery deterioration degree diagnosis method based on AC impedance
  • Power lithium battery deterioration degree diagnosis method based on AC impedance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] refer to figure 1 , a method for diagnosing the degradation degree of power lithium-ion batteries based on AC impedance, including establishing the basic curve library of AC impedance of power lithium-ion batteries, collecting the AC impedance curves of power lithium-ion batteries to be tested, and analyzing the charge transfer of power lithium-ion batteries to be tested Impedance; the establishment of the power lithium-ion battery AC impedance basic curve library is to put the AC impedance curves of power lithium-ion batteries with different degrees of deterioration into the curve library as a basic curve; The AC impedance curve is obtained. The method provided by the invention includes a curve intelligent matching model, a charge transfer impedance model and a comprehensive evaluation model. The method is to intelligently match the A...

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 relates to a power lithium battery deterioration degree diagnosis method based on AC impedance. The method comprises steps that, a power lithium ion battery AC impedance base curve database is established, and an AC impedance curve of a to-be-detected power lithium ion battery is acquired and is analyzed to acquire charge transmission impedance of the to-be-detected power lithium ion battery. According to the method, the AC impedance curve of the to-be-detected power lithium ion battery is acquired, combining an intelligent curve matching model, intelligent matching of the power lithium ion battery AC impedance base curve database is carried out to acquire a corresponding battery deterioration degree, further combining a charge transmission impedance model, the battery deterioration degree is acquired, and the battery deterioration degree is finally outputted through an integrated evaluation model. Through the power lithium battery deterioration degree diagnosis method, the battery deterioration degree can be acquired, optimization use of the power lithium battery can be guided, the utilization rate of the power lithium battery can be improved, and service life of the power lithium battery is prolonged.

Description

technical field [0001] The invention relates to a method for diagnosing the deterioration degree of a power lithium battery, in particular to a method for diagnosing the deterioration degree of a power lithium battery based on AC impedance, which belongs to the technical field of lithium battery testing. Background technique [0002] Lithium-ion batteries are widely used in large-scale energy storage systems such as electric vehicles and energy storage power stations due to their significant advantages such as high specific energy, high specific power, long cycle life, and high charge-discharge efficiency. The state of charge of the battery and the degree of deterioration of the battery are important performance parameters during the use of the battery, which respectively represent the remaining capacity and remaining life of the battery. Reasonably and accurately estimating the degree of battery deterioration is conducive to grasping the degree of battery aging, providing r...

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): G01R31/36
Inventor 张文华刘平王浩吴三毛刘爱华伍发元曹余良
Owner STATE GRID CORP OF CHINA
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