An equivalent circuit model (ECM) for a battery cell, module, and pack

This is the first open source version of PEEC of our group. Its a quasi-static model for free-space electromagnetic problem. It gives equivalent circuit model conductors in a free-space. Gmsh is required as input (old version). .sp file and S-parameter simulation can be the output. The GUI are developping and will come soon.

A tool for automated extraction of equivalent circuit models (ECM) from electrochemical impedance spectroscopy (EIS) data

Machine learning appoaches for the classification of Equivalent Circuit Models based on Electrochemical Impedance Spectroscopy data

A software tool to online identification of lithium-ion battery equivalent circuit model parameters

A python package for simulating Lithium-ion battery performance. Equivalent circuit, Single-Particle, and full Pseudo-2D models are available.

Self-developed ECM model, for learning purpose.

An equivalent circuit network framework for modelling lithium-ion batteries

Equivalent circuit models in Python

Toolbox for fitting EIS curves to equivalent circuit models

A NLEIS toolbox for impedance.py that provides RC level nonlinear equivalent circuit modeling (nECM) and analysis

An Equivalent Circuit model Impedance Fitting program

Equivalent Circuit Model for Lithium-Ion Batteries

Multi-temperature state-dependent equivalent circuit discharge model for lithium-sulfur batteries

Battery model with simple resistance and thevenin first order equivalent circuit approach

Explicit Conversion between different Equivalent Circuit Models for Electrochemical Impedance Analysis of Lithium-ion Batteries

Author: Nathan Totorica Date: 5/14/2021 # Singularity Matrix Pertubation (SMP) This code was written for a class project in the course entitled ECE 504: "ST: Passive Electromagnetic Systems" taught in Spring 2021 by Dr. Ata Zadehgol at the University of Idaho in Moscow. This code was developed, in part, based on the code developed by Jennifer Houle in ECE 504 "ST: Modern Circuit Synthesis Algorithms" taught in Spring 2020 by Dr. Ata Zadehgol. Jennifer's code is available online at https://github.com/JenniferEHoule/Circuit_Synthesis. ## Overview Singular Matrix Perturbation (SMP) as introduced in [11], is a passivity enforcement algorithm for use on fitted models. This robust method is fast, computationally inexpensive, and accurate in enforcing passivity. This implementation using Python can easily be used with Vector Fitting algorithm implemented in [12]. Example cases to demonstrate passivity enforcmment were taken from [7][15], as well as custom examples designed in simulation software based off of multiport circuit synthesis as described in [6]. ## I/O and Flow Description - Instructions for input and output and flow description can be found in flow_diagram.pdf. ## Files - SMP.py: Singularity matrix perturbation implementation of [11] - s_compare.py: Compare ADS simulated S matrices. Calculate RMS error and plot - eig_plot.py: Plotting functions. Eigenvalue plots based off of plot.py in [12] - smp_ex.py: Example of how to pull .sp file in, parse parameters, send to vector fitting, enforce passivity, and generate new passive circuit. Imported from [12] - Ex2_y.py - vectfit3.py - intercheig.py - rot.py - pass_check.py - fitcalc.py - FRPY.py - intercheig.py - violextrema.py - plots.py - quadprog.py - pr2ss.py - utils.py ## Licensing GPL-3.0 License In addition to licensing: Embedding any of (or parts from) the routines of the Matrix Fitting Toolbox in a commercial software, or a software requiring licensing, is strictly prohibited. This applies to all routines, see Section 2.1. If the code is used in a scientific work, then reference should me made as follows: VFdriver.m and/or vectfit3.m: References [1],[2],[3] RPdriver.m and/or FRPY.m applied to Y-parameters: [8],[9] ## References [1] B. Gustavsen and A. Semlyen, "Rational approximation of frequency domain responses by Vector Fitting", IEEE Trans. Power Delivery, vol. 14, no. 3, pp. 1052-1061, July 1999. [2] B. Gustavsen, "Improving the pole relocating properties of vector fitting", IEEE Trans. Power Delivery, vol. 21, no. 3, pp. 1587-1592, July 2006. [3] D. Deschrijver, M. Mrozowski, T. Dhaene, and D. De Zutter, "Macromodeling of Multiport Systems Using a Fast Implementation of the Vector Fitting Method", IEEE Microwave and Wireless Components Letters, vol. 18, no. 6, pp. 383-385, June 2008. [4] B. Gustavsen, VFIT3, The Vector Fitting Website. March 20, 2013. Accessed on: Jan. 21, 2020. [Online]. Available: https://www.sintef.no/projectweb/vectfit/downloads/vfit3/. [5] A. Zadehgol, "A semi-analytic and cellular approach to rational system characterization through equivalent circuits", Wiley IJNM, 2015. [Online]. https://doi.org/10.1002/jnm.2119 [6] V. Avula and A. Zadehgol, "A Novel Method for Equivalent Circuit Synthesis from Frequency Response of Multi-port Networks", EMC EUR, pp. 79-84, 2016. [Online]. Available: ://WOS:000392194100012. [7] B. Gustavsen, Matrix Fitting Toolbox, The Vector Fitting Website. March 20, 2013. Accessed on: Feb. 25, 2020. [Online]. Available: https://www.sintef.no/projectweb/vectorfitting/downloads/matrix-fitting-toolbox/. [8] B. Gustavsen, "Fast passivity enforcement for S-parameter models by perturbation of residue matrix eigenvalues", IEEE Trans. Advanced Packaging, vol. 33, no. 1, pp. 257-265, Feb. 2010. [9] B. Gustavsen, "Fast Passivity Enforcement for Pole-Residue Models by Perturbation of Residue Matrix Eigenvalues", IEEE Trans. Power Delivery, vol. 23, no. 4, pp. 2278-2285, Oct. 2008. [10] A. Semlyen, B. Gustavsen, "A Half-Size Singularity Test Matrix for Fast and Reliable Passivity Assessment of Rational Models," IEEE Trans. Power Delivery, vol. 24, no. 1, pp. 345-351, Jan. 2009. [11] E. Medina, A. Ramirez, J. Morales and K. Sheshyekani, "Passivity Enforcement of FDNEs via Perturbation of Singularity Test Matrix," in IEEE Transactions on Power Delivery, vol. 35, no. 4, pp. 1648-1655, Aug. 2020, doi: 10.1109/TPWRD.2019.2949216. [12] Houle, Jennifer, GitHub. May 10, 2020. Accessed on: February 3, 2021. [Online]. Available: https://github.com/jenniferEhoule/circuit_synthesis

code of the paper "TERIME: An improved RIME algorithm with enhanced exploration and exploitation for robust parameter extraction of photovoltaic models". PV, optimization problems, Metaheuristic, Rao, estimation, stability, uncertainty, RTC France, Equivalent circuit model, renewable energy, solar, stable, multi dimensional, Meta-heuristic, system

This project models a Li-ion battery using a first-order Thevenin equivalent circuit and applies EKF for real-time SOC estimation. Designed for Battery Management System (BMS) applications in Electric Vehicles (EVs), with validation against Coulomb Counting and real-world dataset inputs (voltage, current, temperature).

A lightweight python framework for equivalent circuit impedance models

Julia implementation of an Equivalent Circuit Model (ECM) with diffusion (surface SOC) and thermal dynamics.

# Passivity Enforcement ### Author: Brian Guiana ### Date: 5/14/2021 This code was written for a class project in the course entitled ECE 504: "ST: Passive Electromagnetic Systems" taught in Spring 2021 by Dr. Ata Zadehgol at the University of Idaho in Moscow. This code was developed, in part, based on the code developed by Jennifer Houle in ECE 504 "ST: Modern Circuit Synthesis Algorithms" taught in Spring 2020 by Dr. Ata Zadehgol. Jennifer's code is available online at https://github.com/JenniferEHoule/Circuit_Synthesis. # Overview - This code implements the passivity enforcement algorithm detailed in [11] - This code uses programs written in [12] in order to get a vector fit state-space model to enforce passivity onto - This code was intended to be able to replace the file RPdriver.py in [12] for passivity enforcement # Licensing From [7], restrictions on use, in addition to licensing: >- Embedding any of (or parts from) the routines of the Matrix Fitting Toolbox in a commercial software, or a software requiring licensing, is strictly prohibited. This applies to all routines, see Section 2.1. >- If the code is used in a scientific work, then reference should me made as follows: > - VFdriver.m and/or vectfit3.m: References [1],[2],[3] > - RPdriver.m and/or FRPY.m applied to Y-parameters: [8],[9] # Files ## Primary Files, [12] was the original creator of each associated file. - create_netlist.py [12] - passivity_driver.py [11] - plots.py [12] - utils.py [12] - vectfit3.py [12] - VFdriver.py [12] ## Secondary Files - ex4_Y.py: 4-port example file - input_4_port_ads.s4p: Input for ex4_y.py - netlist.sp: Output for ex4_y.py # Inputs - Singular .sNp file. Vector fitting is applied to this file followed by passivity enforcement # Outputs - Singular .sp file. PSPICE simulation file for use with SPICE simulation software. # References ``` [1] B. Gustavsen and A. Semlyen, "Rational approximation of frequency domain responses by Vector Fitting", IEEE Trans. Power Delivery, vol. 14, no. 3, pp. 1052-1061, July 1999. [2] B. Gustavsen, "Improving the pole relocating properties of vector fitting", IEEE Trans. Power Delivery, vol. 21, no. 3, pp. 1587-1592, July 2006. [3] D. Deschrijver, M. Mrozowski, T. Dhaene, and D. De Zutter, "Macromodeling of Multiport Systems Using a Fast Implementation of the Vector Fitting Method", IEEE Microwave and Wireless Components Letters, vol. 18, no. 6, pp. 383-385, June 2008. [4] B. Gustavsen, VFIT3, The Vector Fitting Website. March 20, 2013. Accessed on: Jan. 21, 2020. [Online]. Available: https://www.sintef.no/projectweb/vectfit/downloads/vfit3/. [5] A. Zadehgol, "A semi-analytic and cellular approach to rational system characterization through equivalent circuits", Wiley IJNM, 2015. [Online]. https://doi.org/10.1002/jnm.2119 [6] V. Avula and A. Zadehgol, "A Novel Method for Equivalent Circuit Synthesis from Frequency Response of Multi-port Networks", EMC EUR, pp. 79-84, 2016. [Online]. Available: ://WOS:000392194100012. [7] B. Gustavsen, Matrix Fitting Toolbox, The Vector Fitting Website. March 20, 2013. Accessed on: Feb. 25, 2020. [Online]. Available: https://www.sintef.no/projectweb/vectorfitting/downloads/matrix-fitting-toolbox/. [8] B. Gustavsen, "Fast passivity enforcement for S-parameter models by perturbation of residue matrix eigenvalues", IEEE Trans. Advanced Packaging, vol. 33, no. 1, pp. 257-265, Feb. 2010. [9] B. Gustavsen, "Fast Passivity Enforcement for Pole-Residue Models by Perturbation of Residue Matrix Eigenvalues", IEEE Trans. Power Delivery, vol. 23, no. 4, pp. 2278-2285, Oct. 2008. [10] A. Semlyen, B. Gustavsen, "A Half-Size Singularity Test Matrix for Fast and Reliable Passivity Assessment of Rational Models," IEEE Trans. Power Delivery, vol. 24, no. 1, pp. 345-351, Jan. 2009. [11] E. Medina, A Ramirez, J. Morales, and K. Sheshyekani, “Passivity Enforcement of FDNEs via Perturbation of Singularity Test Matrix,” IEEE Trans. on Power Del., vol. 35, no. 4, pp. 1648-1655, Aug. 2020. [12] JenniferEHoule, “Circuit_Synthesis,” GitHub, May 12, 2020, Accessed: Mar. 10, 2021, Online, Available: https://github.com/JenniferEHoule/Circuit_Synthesis ```

Battery Equivalent Circuit Model

Julia package that models EIS data using equivalent circuit parameters

This repository contains the lithium-ion battery simulator using the equivalent circuit model.

A Matlab class to generate pulse-multisine signals and estimate non-linear equivalent circuit models of li-ion batteries

C# program that fits a single-diode equivalent-circuit model to experimentally measured IV data

Lithium-ion battery modelling using equivalent circuit, single particle, and enhanced single particle model

Data analysis program for Electrochemical Impedance Spectrocopy (EIS); determination of equivalent circuit models.

No description available