Alexander Bills
Carnegie Mellon University
8 Papers
6 Citations
Alexander Bills is an academic researcher from Carnegie Mellon University. The author has contributed to research in topics: Battery (electricity) & Computer science. The author has an hindex of 2, co-authored 4 publications.
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Papers
Review—"Knees" in Lithium-Ion Battery Aging Trajectories
Peter M. Attia,Alexander Bills,Ferran Brosa Planella,Philipp Dechent,Gonccalo dos Reis,Matthieu Dubarry,Paul Gasper,Richard Gilchrist,Samuel Greenbank,David A. Howey,Ouyang Liu,Edwin Khoo,Yuliya Preger,Abhishek S. Soni,Shashank Sripad,Anna G. Stefanopoulou,Valentin Sulzer +16 more
TL;DR: In this article , the authors review prior work on knee degradation in lithium-ion battery aging trajectories and identify key design and usage sensitivities for knees, and discuss challenges and opportunities for knee modeling and prediction.
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A review of safety considerations for batteries in aircraft with electric propulsion
TL;DR: The most pertinent safety concerns related to batteries can be categorized into two broad areas: exothermic heat related events (thermal issues) and partial or complete loss of safety-critical power supply (functional issues) as mentioned in this paper.
•Posted Content
Universal Battery Performance and Degradation Model for Electric Aircraft
Alexander Bills,Shashank Sripad,William Leif Fredericks,Matthew Guttenberg,Devin Charles,Evan Frank,Venkatasubramanian Viswanathan +6 more
TL;DR: This work generates a battery performance and thermal dataset specific to eVTOL use-cases and develops a fast and accurate performance and degradation model around that dataset using a machine-learning based physics-informed battery performance model to break the typically observed accuracy-computing cost trade-off.
A battery dataset for electric vertical takeoff and landing aircraft
Alexander Bills,Shashank Sripad,Matthew Guttenberg,Devin Charles,Evan Frank,Venkatasubramanian Viswanathan +5 more
TL;DR: In this article , the authors generated a dataset of battery duty profiles for an electric vertical takeoff and landing aircraft using a cell typical for that application, comprising a total of 21,392 charge and discharge cycles.