Heterogeneity in MacMullin Number of Li-ion Battery Electrodes Studied by Means of an Aperture Probe

Abstract Heterogeneity of MacMullin number within battery electrodes is a key metric affecting cell performance. To characterize this heterogeneity, an aperture probe was developed. This probe, coupled with a newly developed transmission-line model, allows for measurements of tortuosity, represented by the MacMullin number, on millimeter length scales. Local MacMullin number values of seven electrodes were measured, and the ionic resistance profiles of these electrodes are given through contour maps of the MacMullin number. The method is validated by comparing the average MacMullin number to the value obtained through other measurement methods. The results show significant local MacMullin number variation in such electrodes on a millimeter length scale. This method will allow battery manufacturers and researchers to better quantify sources of heterogeneity and improve electrode quality.

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(Invited) Impedance Analysis Using Equivalent Circuits with Transmission Line Model for Reaction Distribution in Polymer Electrolyte Fuel Cell and Li-Ion Battery

ECS Meeting Abstracts ◽

10.1149/ma2016-02/23/1716 ◽

2016 ◽

Keyword(s):

Fuel Cell ◽

Transmission Line ◽

Polymer Electrolyte ◽

Impedance Analysis ◽

Polymer Electrolyte Fuel Cell ◽

Equivalent Circuits ◽

Li Ion Battery ◽

Transmission Line Model ◽

Line Model ◽

Li Ion

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Exploring Impedance Growth in High Voltage NMC/Graphite Li-Ion Cells Using a Transmission Line Model

Journal of The Electrochemical Society ◽

10.1149/2.0901603jes ◽

2015 ◽

Vol 163 (3) ◽

pp. A522-A529 ◽

Cited By ~ 27

Author(s):

D. W. Abarbanel ◽

K. J. Nelson ◽

J. R. Dahn

Keyword(s):

Transmission Line ◽

High Voltage ◽

Transmission Line Model ◽

Line Model ◽

Li Ion

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Model Order Reduction of Transmission Line Model

WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS ◽

10.37394/23201.2020.19.7 ◽

2020 ◽

Vol 19 ◽

Keyword(s):

Transmission Line ◽

Large Scale ◽

Original System ◽

Reduced Order Model ◽

Benchmark Problems ◽

Transmission Line Model ◽

Order Model ◽

Line Model ◽

Reduced Order ◽

Numerical Effort

Transmission Line model are an important role in the electrical power supply. Modeling of such system remains a challenge for simulations are necessary for designing and controlling modern power systems.In order to analyze the numerical approach for a benchmark collection Comprehensive of some needful real-world examples, which can be utilized to evaluate and compare mathematical approaches for model reduction. The approach is based on retaining the dominant modes of the system and truncation comparatively the less significant once.as the reduced order model has been derived from retaining the dominate modes of the large-scale stable system, the reduction preserves the stability. The strong demerit of the many MOR methods is that, the steady state values of the reduced order model does not match with the higher order systems. This drawback has been try to eliminated through the Different MOR method using sssMOR tools. This makes it possible for a new assessment of the error system Offered that the Observability Gramian of the original system has as soon as been thought about, an H∞ and H2 error bound can be calculated with minimal numerical effort for any minimized model attributable to The reduced order model (ROM) of a large-scale dynamical system is essential to effortlessness the study of the system utilizing approximation Algorithms. The response evaluation is considered in terms of response constraints and graphical assessments. the application of Approximation methods is offered for arising ROM of the large-scale LTI systems which consist of benchmark problems. The time response of approximated system, assessed by the proposed method, is also shown which is excellent matching of the response of original system when compared to the response of other existing approaches .

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