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

Method and system for detecting state of health (SOH) of lithium battery

A technology of health state and detection method, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of poor judgment accuracy of health state, and achieve the effect of solving inaccurate detection results

Pending Publication Date: 2019-07-26
ZHENGZHOU UNIV
View PDF0 Cites 36 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for detecting the health status of lithium batteries, which is used to solve the problem of poor accuracy in judging the health status of lithium batteries in the prior art; at the same time, in order to solve the above technical problems, the invention also provides a health detection method for lithium batteries system

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
  • Method and system for detecting state of health (SOH) of lithium battery
  • Method and system for detecting state of health (SOH) of lithium battery
  • Method and system for detecting state of health (SOH) of lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Method example:

[0033] This embodiment provides a method for detecting the state of health of a lithium battery, the data flow of which is as follows figure 1 shown, including the following steps:

[0034] (1) Obtain the health characteristic index of lithium battery according to the historical data of lithium battery operation, and adopt the health characteristic index of this lithium battery to train the health state prediction model of lithium battery, obtain the lithium battery health state prediction model after training;

[0035] (2) Detect the data in the current operation process of the lithium battery, obtain the current health characteristic index of the lithium battery according to the data in the actual operation process of the lithium battery, and combine the current health index of the lithium battery with the lithium battery health status prediction model after training to obtain The current state of health of the lithium battery.

[0036] The health ...

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 provides a method and system for detecting the state of health (SOH) of a lithium battery. The method comprises the following steps that health characteristic indexes of the lithium battery are obtained according to historical operation data of the lithium battery; according to the obtained health characteristic indexes of the lithium battery, a lithium battery SOH model is trained,and a trained lithium battery SOH model is obtained; real-time operation data of the lithium battery are detected in the operation process of the lithium battery, health characteristics parameters ofthe lithium battery are obtained from the real-time data, and by combining the trained lithium battery SOH model, the SOH of the lithium battery is obtained; and the health characteristic indexes of the lithium battery comprise the ohmic resistance, the capacity increment peak value, the differential voltage inflection point, the equitime charging and discharging differential pressure, the constant-voltage charging and discharging time difference and the number of charging and discharging times, and the lithium battery SOH model is a model based on an Xgboost algorithm. According to the technical scheme, the problem that in the prior art, the detecting result of the SOH of the lithium battery is inaccurate is solved.

Description

technical field [0001] The invention belongs to the technical field of lithium battery health status detection, and in particular relates to a lithium battery health status detection method and system. Background technique [0002] Due to the advantages of high energy density, long cycle life, and good safety performance, lithium batteries have been rapidly developed in the fields of electric vehicles and grid energy storage. The health status of lithium batteries plays an important role in the safety warning of intelligent battery management systems and the improvement of battery pack life. However, it is also a weak link in current research on lithium battery management. Accurate health status estimation is crucial for the safe and reliable operation of battery systems. important. [0003] The standard definition of battery state of health (SOH, State of Health) refers to the ratio of the amount of electricity that a lithium battery can charge or discharge (the current ca...

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): G01R31/392G01R31/367G01R31/382
CPCG01R31/392G01R31/367G01R31/382
Inventor 高金峰李旭吕娜伟金阳李叶
Owner ZHENGZHOU UNIV
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