PUBLICATIONS

Battery Safety & Deactivation | Battery State Estimation & Diagnostics | Battery Aging Modeling & Prediction | Battery Workforce

2024

A. Weng, O. Ahmed, G. Ehrlich, and A. Stefanopoulou. "Higher labor intensity in US automotive assembly plants after transitioning to electric vehicles." Nature Communications 15, 8088, 2024. [DOI].
C. Wong, A. Weng, S. Pannala, J. Choi, J. B. Siegel, and A. G. Stefanopoulou, "Differential Voltage Analysis and Patterns in Parallel-Connected Pairs of Imbalanced Cells," in American Control Conference (ACC), Toronto, Canada, July 2024.
V. Tran, J.B. Siegel, and A. Stefanopoulou. "Extending a Multi-physics Li-ion Battery Model from Normal Operation to Short Circuit and Venting". (Conditionally accepted) [pre-print]

2023

A. Weng, H. Movahedi, C. Wong, J.B. Siegel, A. Stefanopoulou, "Current imbalance in dissimilar parallel-connected batteries and the fate of degradation convergence." Journal of Dynamics Systems, Measurement and Control (accepted) [pre-print]
H. Movahedi, S. Pannala, J.B. Siegel, and A. Stefanopoulou, “Physics-Informed Optimal Experiment Design of Calendar Aging Tests and Sensitivity Analysis for SEI Parameters Estimation in Lithium-ion Batteries." Modeling, Estimation, and Control Conference (MECC), 2023 [pre-print]
V. Tran, J.B. Siegel, and A. Stefanopoulou. "Single Particle Model with electrolyte for simulating diffusion-limited dynamics during an external short in Li-ion batteries." Modeling, Estimation, and Control Conference (MECC), 2023. [DOI]
A. Weng, E. Olide, I. Kovalchuk, J.B. Siegel, A. Stefanopoulou, "Modeling Battery Formation: Boosted SEI Growth, Multi-Species Reactions, and Irreversible Expansion." Journal of the Electrochemical Society 170 (9), 090523 [DOI]
V. Tran, J.B. Siegel, A. Stefanopoulou, "Emergency Li-ion Battery Discharge Using Nonlinear Model Predictive Control with Temperature and Venting Pressure Constraints." 2023 American Control Conference (ACC), 2500-2505 [DOI]
A. Weng, E. Dufek, A. Stefanopoulou, "Battery passports for promoting electric vehicle resale and repurposing." Joule 7 (5), 837-842 [DOI, PDF]
A. Weng, J.B. Siegel, A. Stefanopoulou, "Differential voltage analysis for battery manufacturing process control." Frontiers in Energy Research 11, 1087269 [DOI]
S. Pannala,H. Movahedi, T.R. Garrick, J.B. Siegel, and A. Stefanopoulou, "Consistently Tuned Battery Lifetime Predictive Model of Capacity Loss, Resistance Increase, and Irreversible Thickness Growth", Journal of Electrochemical Society (Accepted) [pre-print]

2022

E. Hyeon, T. Ersal, Y. Kim, and A. Stefanopoulou, “Loss Function Design for Data-Driven Predictors to Enhance the Energy Efficiency of Connected and Automated Vehicles.” IEEE Transactions on Intelligent Transportation Systems, 1–11, 2022 [DOI]
A. Ramyar, W. Xu, X. Cui, J.B. Siegel, A. Stefanopoulou, and A. Avestruz, “Lite-Sparse Hierarchical Partial Power Processing for Heterogeneous Degradation of Batteries in Energy Storage Systems.” In 2022 IEEE Energy Conversion Congress and Exposition (ECCE), 1–7, 2022 [DOI]
Attia, P. M., A. Bills, F. B. Planella, and P. Dechent, “‘Knees’ in Lithium-Ion Battery Aging Trajectories.” Journal of The Electrochemical Society, 2022 [DOI].
V. Tran, T. Cai, A. Stefanopoulou, and J.B. Siegel, “Equivalent Circuit Model for High C-Rate Discharge with an External Short Circuit.” In 2022 American Control Conference (ACC), 1782–87, 2022 [DOI]
S. Pannala., V. Sulzer, and J. B. Siegel, “Methodology for Accelerated Inter-Cycle Simulations of Li-Ion Battery Degradation with Intra-Cycle Resolved Degradation Mechanisms.” In American Control Conference, 2022 [DOI].
E. Hyeon, T. Ersal, Y. Kim, and A. Stefanopoulou, “Designing the Loss Function of Vehicle Speed Predictors to Enhance Ecological Adaptive Cruise Control Performance.” In 2022 American Control Conference (ACC), 2424–29., 2022 [DOI]
D. Chen, M. Huang, A. Stefanopoulou, “Discrete Mixed-Integer Shooting (DMIS): Algorithm and Application to Plug-In Hybrid Electric Vehicle Energy Management Accounting for Fuel Cranking and Actual Powertrain Efficiency Maps.” IEEE Transactions on Control Systems Technology, 1–14., 2022 [DOI]
X. Cui, A. Ramyar, J. B. Siegel, and P. Mohtat, “Comparing Power Processing System Approaches in Second-Use Battery Energy Buffering for Electric Vehicle Charging.” Journal of Energy Storage, 2022 [DOI]
J. Drallmeier, C. Wong, C. E. Solbrig, J.B. Siegel, A. Stefanopoulou, “Challenges of a Fast Diagnostic to Inform Screening of Retired Batteries.” IFAC-PapersOnLine 55 (24): 185–90, 2022 [DOI]
P. Mohtat, S. Lee, J.B. Siegel, and A. G. Stefanopoulou, “Comparison of Expansion and Voltage Differential Indicators for Battery Capacity Fade.” Journal of Power Sources, 2022 [DOI]
Drallmeier, J. A., and J. B. Siegel. “Iterative Learning-Based Trajectory Optimization Using Fourier Series Basis Functions.” IEEE Control Systems Letters, 2022 [DOI]
S. Pannala, A. Weng, I. Fischer, J.B. Siegel, A. Stefanopoulou, “Low-Cost Inductive Sensor and Fixture Kit for Measuring Battery Cell Thickness Under Constant Pressure.” Modeling, Estimation, and Control Conference (MECC), 2022 [DOI]
A. Weng, S. Pannala, J.B. Siegel, and A. Stefanopoulou, “Parallel-Connected Battery Current Imbalance Dynamics.” Modeling, Estimation, and Control Conference (MECC), 2022 [DOI]
D. Chen, M. Huang, A. Stefanopoulou, and Y. Kim, “Co-Optimization of Velocity and Charge-Depletion for Plug-In Hybrid Electric Vehicles: Accounting for Acceleration and Jerk Constraints.” Journal of Dynamic Systems, Measurement, and Control, 2022 [DOI]
E. Hyeon, Y. Kim, and T. Ersal. 2022. “Data-Driven Forgetting and Discount Factors for Vehicle Speed Forecasting in Ecological Adaptive Cruise Control.” Journal of Dynamic Systems, Measurement, and Control, 2022 [DOI]

2021

1. V. Sulzer, P. Mohtat, S. Pannala, and J. B. Siegel, “Accelerated Battery Lifetime Simulations Using Adaptive Inter-Cycle Extrapolation Algorithm.” Journal of the Electrochemical Society, 2021 [DOI]
2. P. Mohtat, S. Lee, J. Siegel, and A. Stefanopoulou, “Reversible and Irreversible Expansion of Lithium-Ion Batteries Under a Wide Range of Stress Factors,” J. Electrochem. Soc., 2021. [DOI]
3. P. Mohtat, S. Pannala, V. Sulzer, J. B. Siegel, and A. G. Stefanopoulou, “An Algorithmic Safety VEST For Li-ion Batteries During Fast Charging”, Modeling, Estimation, and Control Conference (MECC), 2021. [DOI]
4. T. Cai, V. Tran, A. Stefanopoulou, J. Siegel, "Modeling Li-ion Battery First Venting Events Before Thermal Runaway", Modeling, Estimation, and Control Conference (MECC), 2021 [pre-print]
5. A. Weng, P. Mohtat, P. M. Attia, V. Sulzer, S. Lee, A. Stefanopoulou, "Predicting the impact of formation protocols on battery lifetime immediately after manufacturing" Joule 5, 1-22, November 17, 2021, doi: 10.1016/j.joule.2021.09.015.
6. V. Sulzer, P. Mohtat, A. Aitio, S. Lee, Y. T. Yeh, F. Steinbacher, M. U. Khan, J. W. Lee, J. B. Siegel, A. G. Stefanopoulou, D. A. Howey "The challenge and opportunity of battery lifetime prediction from field data" Joule 5, 1934-1955, August 18, 2021, doi: 10.1016/j.joule.2021.06.005
7. D. Chen, M. Huang, A. G. Stefanopoulou, and Y. Kim, “A Receding-Horizon Framework for Co-optimizing the Velocity and Power-Split of Automated Plug-in Hybrid Electric Vehicles" ASME Lett. Dyn. Syst. Control, 2021, doi: 10.1115/1.4050191.
8. T. Cai, P. Valecha, V. Tran, B. Engle, A. Stefanopoulou, and J. Siegel, “Detection of Li-ion battery failure and venting with Carbon Dioxide sensors,” eTransportation, 2021, doi: 10.1016/j.etran.2020.100100.
9. S. Duraiarasan, R. Salehi, A. Stefanopoulou, S. Mahesh, and M. Allain, “Control-Oriented Physics-Based NOX Emission Model for a Diesel Engine With Exhaust Gas Recirculation,” ASME Lett. Dyn. Syst. Control, 2021, doi: 10.1115/1.4046450.

2020

1. P. Mohtat, S. Lee, V. Sulzer, J. B. Siegel, and A. G. Stefanopoulou, “Differential Expansion and Voltage Model for Li-ion Batteries at Practical Charging Rates,” J. Electrochem. Soc., vol. 167, no. 11, p. 110561, 2020, doi: 10.1149/1945-7111/aba5d1.
2. C. Huang, X. Zhang, R. Salehi, T. Ersal, and A. G. Stefanopoulou, “A Robust Energy and Emissions Conscious Cruise Controller for Connected Vehicles with Privacy Considerations,” 2020, doi: 10.23919/ACC45564.2020.9147406.
3. M. Bieniek, B. Maldonado, A. G. Stefanopoulou, and J. Hoard, “Online Control of Process Variance Using Feedback,” 2020, doi: 10.23919/ACC45564.2020.9147900.
4. S. Duraiarasan, R. Salehi, A. Stefanopoulou, S. Mahesh, and M. Allain, “Control-Oriented Physics-Based NOX Emission Model for a Diesel Engine With Exhaust Gas Recirculation,” ASME Lett. Dyn. Syst. Control, 2021, doi: 10.1115/1.4046450.
5. E. Hyeon, Y. Kim, and A. G. Stefanopoulou, “Fast Risk-Sensitive Model Predictive Control for Systems with Time-Series Forecasting Uncertainties,” 2020, doi: 10.1109/CDC42340.2020.9304447.
6. S. Nazari, F. Borrelli, and A. Stefanopoulou, “Electric Vehicles for Smart Buildings: A Survey on Applications, Energy Management Methods, and Battery Degradation,” Proc. IEEE, 2020, doi: 10.1109/JPROC.2020.3038585.
7. B. P. Maldonado, N. Li, I. Kolmanovsky, and A. G. Stefanopoulou, “Learning reference governor for cycle-to-cycle combustion control with misfire avoidance in spark-ignition engines at high exhaust gas recirculation–diluted conditions,” Int. J. Engine Res., 2020, doi: 10.1177/1468087420929109.
8. T. Cai, B. Engle, A. G. Stefanopoulou, and J. B. Siegel, “Sensing Elevated Carbon Dioxide Levels for Detecting Battery Cell Venting in Packs,” ECS Meet. Abstr., 2020, doi: 10.1149/ma2020-0261057mtgabs.
9. V. Sulzer, P. Mohtat, S. Lee, J. B. Siegel, and A. G. Stefanopoulou, “Promise and challenges of a data-driven approach for battery lifetime prognostics,” arXiv. 2020.
10. S. Pannala, P. Valecha, P. Mohtat, J. B. Siegel, and A. G. Stefanopoulou, “Improved Battery State Estimation Under Parameter Uncertainty Caused by Aging Using Expansion Measurements,” 2020, [Online]. Available: http://arxiv.org/abs/2009.14270.
11. H. Movahedi, M. A. Figueroa-Santos, J. B. Siegel, A. G. Stefanopoulou, and R. Rajamani, “Hybrid nonlinear observer for battery state-of-charge estimation using nonmonotonic force measurements,” Adv. Control Appl. Eng. Ind. Syst., 2020, doi: 10.1002/adc2.38.
12. D. Chen, Y. Kim, M. Huang, and A. Stefanopoulou, “An Iterative and Hierarchical Approach to Co-optimizing the Velocity Profile and Power-split of Plug-in Hybrid Electric Vehicles,” 2020, doi: 10.23919/ACC45564.2020.9147804.
13. T. Cai, S. Pannala, A. G. Stefanopoulou, and J. B. Siegel, “Battery Internal Short Detection Methodology Using Cell Swelling Measurements,” 2020, doi: 10.23919/ACC45564.2020.9147956.
14. S. Nazari, J. Siegel, and A. Stefanopoulou, “Control of hybrid boosting in highly diluted internal combustion engines,” Int. J. Engine Res., 2020, doi: 10.1177/1468087420929769.
15. S. Lee, J. B. Siegel, A. G. Stefanopoulou, J.-W. Lee, and T.-K. Lee, “Electrode State of Health Estimation for Lithium Ion Batteries Considering Half-cell Potential Change Due to Aging,” J. Electrochem. Soc., vol. 167, no. 9, p. 090531, 2020, doi: 10.1149/1945-7111/ab8c83.
16. R. Salehi and A. Stefanopoulou, “Parameter Set Reduction and Ensemble Kalman Filtering for Engine Model Calibration,” J. Dyn. Syst. Meas. Control, 2020, doi: 10.1115/1.4045090.
17. C. Huang, R. Salehi, T. Ersal, and A. G. Stefanopoulou, “An energy and emission conscious adaptive cruise controller for a connected automated diesel truck,” Veh. Syst. Dyn., 2020, doi: 10.1080/00423114.2020.1740283.
18. Y. Luo, B. Maldonado, S. Liu, C. Solbrig, D. Adair, and A. Stefanopoulou, “Portable In-Cylinder Pressure Measurement and Signal Processing System for Real-Time Combustion Analysis and Engine Control,” 2020, doi: 10.4271/2020-01-1144.
19. S. Duraiarasan, R. Salehi, F. Wang, A. Stefanopoulou, M. Allain, and S. Mahesh, “Real-Time Embedded Models for Simulation and Control of Clean and Fuel-Efficient Heavy-Duty Diesel Engines,” 2020, doi: 10.4271/2020-01-0257.
20. E. R. Amezcua, B. Maldonado, D. Rothamer, K. Kim, C. B. Kweon, and A. Stefanopoulou, “Accelerometer-Based Estimation of Combustion Features for Engine Feedback Control of Compression-Ignition Direct-Injection Engines,” 2020, doi: 10.4271/2020-01-1147.
21. M. Woody, M. Arbabzadeh, G. M. Lewis, G. A. Keoleian, and A. Stefanopoulou, “Strategies to limit degradation and maximize Li-ion battery service lifetime - Critical review and guidance for stakeholders,” J. Energy Storage, 2020, doi: 10.1016/j.est.2020.101231.
22. S. Nazari, J. Siegel, R. Middleton, and A. Stefanopoulou, “Power Split Supercharging: A Mild Hybrid Approach to Boost Fuel Economy,” Energies, 2020, doi: 10.3390/en13246580.
23. B. P. Maldonado, A. G. Stefanopoulou, M. Van Nieuwstadt, B. Fulton, J. Hoard, and M. Bieniek, “Modelling and estimation of combustion variability for fast light-off of diesel aftertreatment,” Int. J. Powertrains, 2020, doi: 10.1504/ijpt.2020.10030336.
24. M. A. Figueroa-Santos, J. B. Siegel, and A. G. Stefanopoulou, “Leveraging cell expansion sensing in state of charge estimation: Practical considerations,” Energies, 2020, doi: 10.3390/en13102653.
25. S. Lee, P. Mohtat, J. B. Siegel, A. G. Stefanopoulou, J. W. Lee, and T. K. Lee, “Estimation Error Bound of Battery Electrode Parameters with Limited Data Window,” IEEE Trans. Ind. Informatics, vol. 16, no. 5, pp. 3376–3386, 2020, doi: 10.1109/TII.2019.2952066.

2019

1. S. Lee, Y. Kim, J. B. Siegel, and A. G. Stefanopoulou, “Minimum-time measurement of open circuit voltage of battery systems,” 2019, doi: 10.23919/acc.2019.8814911.
2. X. Zhang, C. Huang, M. Liu, A. Stefanopoulou, and T. Ersal, “Predictive Cruise Control with Private Vehicle-to-Vehicle Communication for Improving Fuel Consumption and Emissions,” IEEE Commun. Mag., 2019, doi: 10.1109/MCOM.001.1900146.
3. S. Xu, K.-H. Chen, N. P. Dasgupta, J. B. Siegel, and A. G. Stefanopoulou, “Evolution of Dead Lithium Growth in Lithium Metal Batteries: Experimentally Validated Model of the Apparent Capacity Loss,” J. Electrochem. Soc., 2019, doi: 10.1149/2.0991914jes.
4. J. A. Drallmeier, J. B. Siegel, and A. G. Stefanopoulou, “Comparison of estimation techniques for the crankshaft dynamics of an opposed piston engine,” 2019, doi: 10.1115/DSCC2019-9206.
5. R. Salehi, A. Stefanopoulou, and B. Vernham, “Diesel air path control using pressure difference: Pumping loss and aging considerations,” Proc. Inst. Mech. Eng. Part D J. Automob. Eng., 2019, doi: 10.1177/0954407018784696.
6. B. P. Maldonado, C. E. Solbrig, and A. G. Stefanopoulou, “Feasibility and Calibration Considerations for Selection of Combustion Control Features,” 2019, doi: 10.1109/CCTA.2019.8920631.
7. R. Salehi, A. Stefanopoulou, S. Mahesh, and M. Allain, “Reduced-order long-horizon predictive thermal management for diesel engine aftertreatment systems,” 2019, doi: 10.23919/acc.2019.8814313.
8. S. Nazari, N. Prakash, J. Siegel, and A. Stefanopoulou, “On the effectiveness of hybridization paired with eco-driving,” 2019, doi: 10.23919/acc.2019.8814975.
9. E. Hyeon, Y. Kim, N. Prakash, and A. G. Stefanopoulou, “Short-term speed forecasting using vehicle wireless communications,” 2019, doi: 10.23919/acc.2019.8814400.
10. T. Cai, A. G. Stefanopoulou, and J. B. Siegel, “Modeling Li-Ion Battery Temperature and Expansion Force during the Early Stages of Thermal Runaway Triggered by Internal Shorts,” J. Electrochem. Soc., vol. 166, no. 12, pp. A2431–A2443, 2019, doi: 10.1149/2.1561910jes.
11. P. Mohtat, S. Lee, J. B. Siegel, and A. G. Stefanopoulou, “Towards better estimability of electrode-specific state of health: Decoding the cell expansion,” J. Power Sources, 2019, doi: 10.1016/j.jpowsour.2019.03.104.
12. X. Lin, Y. Kim, S. Mohan, J. B. Siegel, and A. G. Stefanopoulou, “Modeling and Estimation for Advanced Battery Management,” Annu. Rev. Control. Robot. Auton. Syst., 2019, doi: 10.1146/annurev-control-053018-023643.
13. T. Cai, A. G. Stefanopoulou, and J. B. Siegel, “Early Detection for Li-Ion Batteries Thermal Runaway Based on Gas Sensing,” ECS Trans., 2019, doi: 10.1149/08901.0085ecst.
14. S. Nazari, R. Middleton, J. Siegel, and A. Stefanopoulou, “Equivalent consumption minimization strategy for a power split supercharger,” 2019, doi: 10.4271/2019-01-1207.
15. B. P. Maldonado, K. Zaseck, E. Kitagawa, and A. G. Stefanopoulou, “Closed-Loop Control of Combustion Initiation and Combustion Duration,” IEEE Trans. Control Syst. Technol., 2020, doi: 10.1109/TCST.2019.2898849.
16. S. Nazari, J. Siegel, and A. Stefanopoulou, “Optimal energy management for a hybrid electric vehicle with a power split supercharger,” 2019, doi: 10.1109/VPPC.2018.8604999.
17. X. Lin, H. E. Perez, J. B. Siegel, and A. G. Stefanopoulou, “Robust estimation of battery system temperature distribution under sparse sensing and uncertainty,” IEEE Trans. Control Syst. Technol., 2020, doi: 10.1109/TCST.2019.2892019.
18. B. Maldonado, A. Stefanopoulou, R. Scarcelli, and S. Som, “Characteristics of cycle-to-cycle combustion variability at partial-burn limited and misfire limited spark timing under highly diluted conditions,” 2020, doi: 10.1115/ICEF2019-7256.
19. E. Hyeon, Y. Kim, N. Prakash, and A. G. Stefanopoulou, “Influence of speed forecasting on the performance of ecological adaptive cruise control,” 2019, doi: 10.1115/DSCC2019-9046.
20. M. Bieniek, A. Stefanopoulou, J. Hoard, B. Maldonado, B. Fulton, and M. Van Nieuwstadt, “Retard to the Limit: Closed-Loop COVIMEP Control for Aggressive Exhaust Heating,” 2019, doi: 10.1016/j.ifacol.2019.09.099.
21. C. Guardiola, B. Pla, P. Bares, and A. Stefanopoulou, “Cylinder charge composition observation based on in-cylinder pressure measurement,” Meas. J. Int. Meas. Confed., 2019, doi: 10.1016/j.measurement.2018.08.024.