TY - GEN
T1 - Parameter determination and evaluation of a Thévenin dynamic model for a li-ion cylindrical cell used in CubeSat applications
AU - Fernández-Arias, Diego
AU - Rojas, Juan J.
N1 - Publisher Copyright:
© 2024 Latin American and Caribbean Consortium of Engineering Institutions. All rights reserved.
PY - 2024
Y1 - 2024
N2 - The limited processing capacity of the lean satellites means that the indicators describing the general state of the cells that make up their power subsystem are rarely estimated. Such is the case of the SOC, whose estimation will be relevant for the control of this subsystem during the mission. Following the idea that these satellites seek a low cost, in this work, a cost-effective cycler was integrated to obtain the parameters of the cells. These were used as the input data of a Thévenin equivalent circuit model with one RC pair to obtain the estimated SOC. The Coulomb Counting method was chosen to calculate the real SOC from simulated data of the BIRDS mission. The results were evaluated and compared with simpler methods to demonstrate their accuracy. A mean absolute percentage error (MAPE) of 1.00337% was obtained, showing that the selected Thévenin model produced precise results without compromising processing power for other functions during the satellite mission.
AB - The limited processing capacity of the lean satellites means that the indicators describing the general state of the cells that make up their power subsystem are rarely estimated. Such is the case of the SOC, whose estimation will be relevant for the control of this subsystem during the mission. Following the idea that these satellites seek a low cost, in this work, a cost-effective cycler was integrated to obtain the parameters of the cells. These were used as the input data of a Thévenin equivalent circuit model with one RC pair to obtain the estimated SOC. The Coulomb Counting method was chosen to calculate the real SOC from simulated data of the BIRDS mission. The results were evaluated and compared with simpler methods to demonstrate their accuracy. A mean absolute percentage error (MAPE) of 1.00337% was obtained, showing that the selected Thévenin model produced precise results without compromising processing power for other functions during the satellite mission.
KW - electrical power system
KW - equivalent circuit model
KW - lean satellite
KW - state of charge
UR - https://www.scopus.com/pages/publications/85203810231
U2 - 10.18687/LACCEI2024.1.1.1937
DO - 10.18687/LACCEI2024.1.1.1937
M3 - Contribución a la conferencia
AN - SCOPUS:85203810231
T3 - Proceedings of the LACCEI international Multi-conference for Engineering, Education and Technology
BT - Proceedings of the 22nd LACCEI International Multi-Conference for Engineering, Education and Technology
PB - Latin American and Caribbean Consortium of Engineering Institutions
T2 - 22nd LACCEI International Multi-Conference for Engineering, Education and Technology, LACCEI 2024
Y2 - 17 July 2024 through 19 July 2024
ER -