Super capacitor non-linear three-branch equivalent circuit model and parameter identification method

A technology of equivalent circuit model and supercapacitor, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as difficult to solve the maximum likelihood function, complex operation of the maximum likelihood method, etc., to achieve convenient engineering Application, strong practicability, and high-precision effects

Active Publication Date: 2017-02-15
WUHAN UNIV OF TECH
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second type of method is called the maximum likelihood method. The biggest disadvantage of the maximum likelihood method is that the distribution fo

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
  • Super capacitor non-linear three-branch equivalent circuit model and parameter identification method
  • Super capacitor non-linear three-branch equivalent circuit model and parameter identification method
  • Super capacitor non-linear three-branch equivalent circuit model and parameter identification method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example one

[0032] A nonlinear three-branch equivalent circuit model of a super capacitor, such as figure 1 As shown, the nonlinear three-branch equivalent circuit model of the supercapacitor includes the equivalent series resistance R1 and three parallel branches connected in series from the positive terminal to the negative terminal. The three parallel branches include the self-discharge resistance R3 branch and the instantaneous branch. Circuit and long-term branch; instantaneous branch includes parallel capacitor C1 and variable capacitor Cf, the capacitance value of variable capacitor Cf changes with the change of super capacitor terminal voltage; long-term branch includes series resistor R2 and capacitor C2 .

Example Embodiment

[0033] Example two

[0034] A parameter identification method of a super capacitor nonlinear three-branch equivalent circuit model, including: establishing a super capacitor nonlinear three-branch equivalent circuit model to perform charging and discharging experiments on the super capacitor, and obtaining the equivalent circuit model from the experimental data obtained from the experiment The experimental data includes the terminal voltage, charging current and charging time of the supercapacitor during each charge and discharge experiment. Such as figure 2 As shown, it specifically includes the following steps:

[0035] Step 1. Establish a non-linear three-branch equivalent circuit model of the super capacitor. The non-linear three-branch equivalent circuit model of the super capacitor is the same as the first embodiment. Such as figure 1 As shown, the nonlinear three-branch equivalent circuit model of the supercapacitor includes the equivalent series resistance R1 and three p...

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
Capacitanceaaaaaaaaaa
Login to view more

Abstract

The invention discloses a super capacitor non-linear three-branch equivalent circuit model and a parameter identification method. The super capacitor non-linear three-branch equivalent circuit model is established, charging and discharging tests on a super capacitor are carried out, model parameters of the equivalent circuit model are acquired according to the test data acquired through the tests, and the test data includes an end voltage, a charging current and the charging time of the super capacitor during each charging and discharging test. Through the model, an actual work state and performance of the super capacitor can be reliably reflected, external electrical characteristics of the super capacitor can be excellently represented in a longer time scope, moreover, parameter selection is more simplified, parameter identification can be realized, high accuracy is realized, practicality is strong, and the model is practically convenient for engineering application.

Description

Technical field [0001] The invention belongs to the field of super capacitor modeling and parameter identification, and specifically relates to a super capacitor nonlinear three-branch equivalent circuit model and parameter identification method. Background technique [0002] Supercapacitors have shown a rising industry trend in the field of new energy. Many developed countries have made supercapacitor projects as a national key research and development project. The domestic and foreign markets of supercapacitors are showing unprecedented prosperity. At present, the potential of supercapacitors has received more and more attention. In the design of energy equalization devices with good performance for supercapacitors and other important applications of supercapacitors, it is necessary to obtain the best design scheme through repeated circuit simulation and parameter optimization. Among them, the most basic but also the most critical link Just need an accurate super capacitor mod...

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): G01R31/00
CPCG01R31/00
Inventor 谢长君孙绍博麦立强蔡振华全书海曾春年石英黄亮陈启宏张立炎
Owner WUHAN UNIV OF TECH
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