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Conceptual design of hybrid battery modules for optimising electric aircraft performance

Damian, Gabriel-André Dominic (2020) Conceptual design of hybrid battery modules for optimising electric aircraft performance.

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Abstract:The presented research investigates the usage of a hybrid battery solution for full-electric aircraft as mean of battery weight optimisation. The concept is to utilise a high-energy dense battery module for the cruise phase and a high-power dense battery module for the take-off and climb phase, rather than to use a singular battery for the whole flight. It was previously expected that such approach would overall increase the specific energy of the battery without reducing the power performance for take-off, hence reducing the weight of the battery. The result, however, pointed out that a hybrid solution will in most cases lead to a minor weight increase of the battery, but will also significantly increase the energy density. It was found that a hybrid solution inherently cost additional weight for an-extra power-dense battery module for the take-off and climb phase. Overall, a hybrid solution is not recommended for long range fixed-wing configuration. But for multicopter and VTOL, a hybrid solution is recommended as it may increase the operational range by 63% and 84% with only 7% and 16% battery weight increase respectively. Finally, the research has found that the optimal circuit topology for switching between two battery sources is best achieved using N-Chanel power MOSFETs in parallel and in dual configuration. With this approach, a scalable circuit can be developed to handle high-power requirements with minimal energy losses.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:01 general works, 53 electrotechnology
Programme:Electrical Engineering BSc (56953)
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