Maximum temperature analysis in a Li-ion battery pack cooled by different fluids
- PDF / 1,051,023 Bytes
- 17 Pages / 595.276 x 790.866 pts Page_size
- 1 Downloads / 167 Views
Maximum temperature analysis in a Li‑ion battery pack cooled by different fluids Imran Mokashi1,2 · Sher Afghan Khan1 · Nur Azam Abdullah1 · Muhammad Hanafi Bin Azami1 · Asif Afzal3 Received: 2 November 2019 / Accepted: 10 July 2020 © Akadémiai Kiadó, Budapest, Hungary 2020
Abstract The use of Li-ion battery in electric vehicles is becoming extensive in the modern-day world owing to their high energy density and longer life. But there is a concern of proper thermal management to have consistent performance. Therefore, proper cooling mechanism to have a good life and reliability on the battery system is necessary. The main objective of this analysis is to assess the maximum temperature that causes thermal runaway when the battery pack is cooled by several fluids. Five categories of coolants are passed over the heat-generating battery pack to extract the heat and keep the temperature in the limit. Different kinds of gases, conventional oils, thermal oils, nanofluids, and liquid metals are adopted as coolants in each category. This analysis is a novel study which considers different categories of coolant and conjugate heat transfer condition at the battery pack and coolant interface. In each group of coolant, five types of fluids are selected and analyzed to obtain the least maximum temperature of battery. The flow Reynolds number (Re), heat generation (Qgen), and conductivity ratio (Cr) are other parameters considered for the analysis. The Nusselt number for air and water as coolant with increase in Re is studied separately at the end. The maximum temperature is found to increase with Qgen and decrease for Re and Cr. Thermal oils, nanofluids, and liquid metals are found to provide maximum temperature in the same range of 0.62 to 0.54. At the same time, gases have nearly the same effect at different values of Re and Cr. Keywords Li-ion battery · Conjugate · Maximum temperature · Coolants · Conductivity ratio · Heat generation List of symbols Cr Conductivity ratio L Length of the battery cell (m) k Thermal conductivity (W m−1 k−1) q‴ Volumetric heat generation (W m−3) Qgen Dimensionless volumetric heat generation Pr Prandtl number Re Reynolds number T* Temperature (°C) T Non-dimensional temperature * Imran Mokashi [email protected] * Asif Afzal [email protected] 1
Department of Mechanical Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia
2
Department of Mechanical Engineering, Bearys Institute of Technology, (Affiliated to Visvesvaraya Technological University), Mangaluru, India
3
Department of Mechanical Engineering, P. A. College of Engineering (Affiliated to Visvesvaraya Technological University), Mangaluru, India
u Velocity along the axial direction (m s−1) U Non-dimensional velocity along the axial direction u∞ Free stream velocity (m s−1) v Velocity along the transverse direction (m s−1) V Non-dimensional velocity along the transverse direction w Half-width (m) Ws Non-dimensional width Nuavg Average Nusselt number Greek symbols α Thermal diff
Data Loading...
