Modeling the Effect of Cell Variation on the Performance of a Lithium-Ion Battery Module

Modeling the Effect of Cell Variation on the Performance of a Lithium-Ion Battery Module

Owing to the variation between lithium-ion battery (LIB) cells, early discharge termination and overdischarge can occur when cells are coupled in series or parallel, thereby triggering a decrease in LIB module performance and safety. This study provides a modeling approach that considers the effect...

Full description

Saved in:
Bibliographic Details
Published in:Energies (Basel) Vol. 15; no. 21; p. 8054
Main Authors: Lee, Dongcheul, Kang, Seohee, Shin, Chee
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-11-2022
Subjects:
Algorithms
Analysis
Batteries
cell performance deviation
electrical behaviors
Electrodes
Energy storage
Lithium
Lithium-ion batteries
lithium-ion battery
Mathematical optimization
modeling
Modelling
Ohm's Law
Optimization
Optimization techniques
Variation
voltage deviation
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Owing to the variation between lithium-ion battery (LIB) cells, early discharge termination and overdischarge can occur when cells are coupled in series or parallel, thereby triggering a decrease in LIB module performance and safety. This study provides a modeling approach that considers the effect of cell variation on the performance of LIB modules in energy storage applications for improving the reliability of the power quality of energy storage devices and efficiency of the energy system. Ohm’s law and the law of conservation of charge were employed as the governing equations to estimate the discharge behavior of a single strand composing of two LIB cells connected in parallel based on the polarization properties of the electrode. Using the modeling parameters of a single strand, the particle swarm optimization algorithm was adopted to predict the discharge capacity and internal resistance distribution of 14 strands connected in series. Based on the model of the LIB strand to predict the discharge behavior, the effect of cell variation on the deviation of the discharge termination voltage and depth of discharge imbalance was modeled. The validity of the model was confirmed by comparing the experimental data with the modeling results.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15218054