Browsing by Author "Panchal, S."

Filter results by typing the first few letters
Now showing 1 - 4 of 4
  • 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
  • No Thumbnail Available
    Item
    Stability Assessment of Vertical Remnant Pillars In Cut and Fill Mining Method with Numerical Modelling
    (Avestia Publishing, 2025) Mohanto, S.; Upare, A.; Santosh, M.; Panchal, S.; Senapati, A.
    Cut and fill mining method involves extraction of orebody in horizontal slices in weak rock formations. The void created as a result of excavation is backfilled and vertical pillars are left at intervals if the overlying roof is weak. This method is advantageous in terms of ore recovery and safety, making it a preferred method for steeply dipping orebodies in challenging underground environments. These remnant pillars left intact plays a crucial role in supporting the overlying strata and protecting a safe environment for ore exploitation. The stability of these pillars is important since pillar failure results in catastrophic consequences including subsidence or even loss of lives. Hence, the pillar dimension is one of the important parameters which governs the stability of the overlying strata in cut and fill mining method. The present study focuses on the assessment of vertical pillar stability with 5 m × 5 m dimension left intact throughout the entire depth of orebody in cut and fill post pillar mining method considering three-dimensional finite element analyses. Based on the simulation results obtained from numerical modeling, it was found that the pillar dimension of 5 m × 5 m was stable enough for the considered geo-mining condition with factor of safety above unity. © 2025 Avestia Publishing. All rights reserved.
  • No Thumbnail Available
    Item
    Thermal management of large-sized LiFePO4 pouch cell using simplified mini-channel cold plates
    (Elsevier Ltd, 2023) Kausthubharam, n.; Koorata, P.K.; Panchal, S.
    An efficient, simplified mini-channel cooling plate-based thermal management system is presented for LiFePO4 pouch cell. The proposed design improves the uniformity in surface temperature difference by more than 100% compared to existing literature data on similar designs. The proposed coolant design is tested for temperature distribution and cooling efficiency parameters by varying the cooling fluid volume flow rate and inlet temperatures from 15 ml/min to 150 ml/min and 5 °C to 35 °C, respectively. The proposed design maintains the maximum temperature in the cell well below 40 °C even under a 4C discharge rate and a high coolant inlet temperature of 35 °C. Increasing the coolant temperature is observed to positively impact the temperature homogeneity in the pouch cell. Further, an increase in the cooling liquid flow rate is observed to have a reduced impact on the maximum temperature reduction at all discharge rates. In comparison with the existing minichannel-based study, the proposed cooling system improved the temperature uniformity of the pouch cell by more than 140%. The proposed simple design is easily scalable to modular packs of pouch cells. © 2023 Elsevier Ltd