This paper investigates the use of a passive in-flight battery thermal management system for an electric trainer aircraft. The proposed architecture employs a high-conductivity heat pipe coupled with a heat sink to provide cooling. Two different thermal management approaches are used for ground and flight operations. During charge, a ground-based air conditioning unit is used for thermal management. In flight, the system relies on preconditioning of the battery pack’s thermal mass to limit the temperature rise to acceptable levels, reducing the onboard weight and complexity associated with the battery thermal management system. To assess the performance of the proposed system over the entire lifetime of the battery pack, for both flight and ground operations, a coupled electrothermal-aging model based on semi-empirical data was created and validated experimentally for a notional touch-and-go training mission of a conceptual electric Cessna 172N. Resulting time-dependent performance diagrams presenting the evolution of maximum battery temperature, the ground turnaround time, and the capacity fade are used to determine operational constraints throughout the 2-year-and-a-half lifetime of the pack.

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Copyright © 2024 by Émile Veilleux, Hadi Pasdarshahri, David Rancourt, and Doriane Daoudji. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. All requests for copying and permission to reprint should be submitted to CCC at www.copyright.com; employ the eISSN 1533-3868 to initiate your request. See also AIAA Rights and Permissions www.aiaa.org/randp.

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This research was funded by NSERC Grant Number ALLRP 560762-20 and CRIAQ (iNORTH). The authors would like to thank Calogy Solutions for enabling the use of cycling and characterization equipment, as well as a prototype module for model validation.

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Received30 August 2024
Accepted27 September 2024
Published online17 December 2024

Passive Thermal Management of an Electric Trainer Aircraft Battery Pack Considering Aging

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