Hybridizing aircraft propulsion systems through the addition of electrically driven fans and on-board battery storage has been shown in several studies to have the potential to significantly reduce aircraft fuel burn and emissions. This paper investigates how different hybrid electric aircraft (HEA) operation regimes may affect the lifetime of the battery electric storage system (ESS). Battery cycling tests emulating three widely proposed electric operation regimes -a constant power regime, a stepped power regime, and a ramped power regime- are conducted. The capacity degradation and internal dc resistance change of the cells under test are investigated. The tests show that the stepped power operation regime is better for retaining the capacity of ESS batteries; whereas the ramped power operation regime designed for maximum fuel saving tends to accelerate battery degradation most severely.
Investigation of Hybrid Electric Aircraft Operation on Battery Degradation
2018-11-01
1861432 byte
Conference paper
Electronic Resource
English
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