Browsing by Author "Fowler, M."

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Combined influence of concentration-dependent properties, local deformation and boundary confinement on the migration of Li-ions in low-expansion electrode particle during lithiation
    (Elsevier Ltd, 2022) Kausthubharam, n.; Koorata, P.K.; Panchal, S.; Fraser, R.; Fowler, M.
    In this article, a low expansion electrode particle is investigated for mechanical stresses during lithiation with intrinsic and extrinsic factors included. The stress states are estimated with local deformation, concentration dependent properties, and external constraints. It is observed that lithiation of an unconstrained electrode particle lead to reduced concentration gradient of Li-ions with increase in stress magnitude for a case where the particle show concentration dependent stiffening response. Whereas, the constrained expansion of the same electrode particle result in reduced and elevated concentration gradient at near-field and far-field locations, respectively. Influence of charging rate is also reported wherein limiting stress (threshold limit) is observed with increasing charging rate. Further, at elevated charging rates, a drastic reduction in concentration gradient is observed at the surface of the electrode particle. © 2022 Elsevier Ltd
  • No Thumbnail Available
    Item
    Investigation of the thermal performance of biomimetic minichannel-based liquid-cooled large format pouch battery pack
    (Elsevier Ltd, 2024) Kausthubharam, n.; Koorata, P.K.; Panchal, S.; Fraser, R.; Fowler, M.
    This article presents a diagonal-type minichannel-based thermal management system for a 20 Ah pouch cell battery. An optimal thermal strategy is suggested by numerically investigating the cooling performance of the proposed design for various structural and operational parameters. Besides the design, mini-channel optimization is observed to have played a significant role in pressure drop and temperature. An operational parametric study recommends an inlet temperature of 25 °C and a flow rate of 12.5 cm3/s for the liquid coolant for optimal pouch cell performance. The enhancement of temperature distribution uniformity is noted to diminish at higher cooling fluid flow rates. Further, a comparison with existing literature revealed a 75 % increase in temperature homogeneity across the pouch cell. The feasibility of the proposed design with an optimized cooling framework at the module level is demonstrated for the 43 V battery pack. The thermal system maintained the maximum temperature in the pack 20 % below the upper limit of the recommended range for Li-ion cells. © 2024 Elsevier Ltd