ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Joint estimation of multidimensional battery health indicators for electric vertical take-off and landing aircraft applications
Received date: 2024-10-23
Revised date: 2024-11-11
Accepted date: 2024-12-14
Online published: 2025-01-10
Supported by
National Natural Science Foundation of China(52307244);Shanghai Center for Systems Engineering of Commercial Aircraft Joint Research Foundation(CASEF-2023-XM3);China Postdoctoral Science Foundation(2023M742255)
Electric Vertical Take-off and Landing （eVTOL） aircraft is one of the significant trends in the development of renewable low-altitude aircraft. To meet the requirements for safe and reliable operation of eVTOL， it is necessary for the battery management system to accurately and efficiently estimate the State-of-Health （SoH） of the on-board lithium-ion battery system based on the characteristics of the flight profile. At present， most SoH estimation algorithms for eVTOL applications only consider the battery capacity loss， and lack the ability to comprehensively and precisely estimate battery degradation in both energy and power based on the data recorded during the specific flight phase. To address the aforementioned issue， the battery current and voltage measured during the take-off phase of the eVTOL aircraft are selected as the inputs for the estimation algorithm， and the battery capacity， the ohmic resistance， and the polarization resistance are utilized as the health indicators to comprehensively characterize the battery degradation. To improve the training efficiency and estimation accuracy of the model for multi-indicator estimation， a multi-output least squares support vector regression-based method for joint estimation of multiple battery health indicators is proposed， which can achieve rapid and accurate estimation of the battery capacity and resistance by considering the coupling relationship among output parameters. Finally， experimental verification is conducted based on the eVTOL Battery Dataset. The results of the comparative study demonstrate that based on the proposed method， the mean absolute percentage error of the estimated battery capacity and internal resistance are overall below 2.5% and the model training time is within 0.05 s， successfully realizing a comprehensive， efficient， and accurate estimation of lithium-ion battery health indicators for eVTOL applications.
Jufeng YANG , Wenxin HUANG , Jiukang SUN , Zhongchen MA , Guodong FAN , Xi ZHANG . Joint estimation of multidimensional battery health indicators for electric vertical take-off and landing aircraft applications[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(14) : 331440 -331440 . DOI: 10.7527/S1000-6893.2024.31440
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