Publication detail

Modeling Heat Transfer in Cylindrical Batteries: Spiral-Based Thermal Conductivity Tensor

HVOŽĎA, J. BOHÁČEK, J. VAKHRUSHEV, A. KARIMI-SIBAKI, E.

Original Title

Modeling Heat Transfer in Cylindrical Batteries: Spiral-Based Thermal Conductivity Tensor

Type

journal article in Scopus

Language

English

Original Abstract

This study investigates the importance of considering the well-known spiral structure of cylindrical batteries in numerical models of heat transfer. Such models typically simplify the internal geometry by a concentric layout of electrodes and separators, resulting in an effective orthotropic thermal conductivity with radial, tangential, and axial components defined in a cylindrical coordinate system. However, the actual spiral structure suggests radius-dependent thermal conductivity. In this study, several thermal simulations were performed, comparing thermal fields obtained with the commonly used cylindrical orthotropy and a more realistic spiral structure. The results show that the spiral structure has a negligible effect on the overall temperature distribution for configurations with dense spirals and higher radial thermal conductivity (2 W·m−1·K−1). However, for lower radial thermal conductivity (0.2 W·m−1·K−1), considerable errors were observed even for dense spirals. These findings emphasize the need for studies to justify simplifications made in the thermal conductivity tensor.

Keywords

Battery thermal management systems, Li-Ion cylindrical batteries, orthotropic thermal conductivity, spiral structure.

Authors

HVOŽĎA, J.; BOHÁČEK, J.; VAKHRUSHEV, A.; KARIMI-SIBAKI, E.

Released

30. 1. 2025

Publisher

Avestia Publishing

ISBN

2368-6111

Periodical

Journal of Fluid Flow, Heat and Mass Transfer

Year of study

12

Number

1

State

Canada

Pages from

23

Pages to

28

Pages count

6

URL

https://jffhmt.avestia.com/2025/PDF/003.pdf

Full text in the Digital Library

http://hdl.handle.net/11012/250774

BibTex

@article{BUT196473,
  author="Jiří {Hvožďa} and Jan {Boháček} and Alexander {Vakhrushev} and Ebrahim {Karimi-Sibaki}",
  title="Modeling Heat Transfer in Cylindrical Batteries: Spiral-Based Thermal Conductivity Tensor",
  journal="Journal of Fluid Flow, Heat and Mass Transfer",
  year="2025",
  volume="12",
  number="1",
  pages="23--28",
  doi="10.11159/jffhmt.2025.003",
  issn="2368-6111",
  url="https://jffhmt.avestia.com/2025/PDF/003.pdf"
}