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2024
2024
October 28-30, 2024
The group attended the 2024 Modeling, Estimation, and Control Conference (MECC) in Chicago.
Anna Stefanopoulou gave the prestigious Nyquist Lecture, titled Battery State Estimation from Manufacturing to End of Life.
We also presented the following lightning talks and posters:
Zhiwen (presented by Xin Hui): Degradation and Expansion of Lithium-Ion Batteries with Silicon/Graphite Anodes: Impact of Temperature, Pretension and State-Of-Charge Window
Jingchen: Opportunities for Improving Winter Performance of Electric School Buses with Thermal Preconditioning
Vivian: Sensitivity of Li-Ion Battery Aging on Cell Venting Behavior
Sravan: Tuning Physics-Based Models for Battery Lifetime Prediction
Andrew: On Using "OCV-R" to Describe Parallel-Connected Battery System Dynamics: Deeper Insights from Simpler Models, and Towards Battery Formation Protocol Optimization Via Pressure, Temperature, and Current Control: New Experimental and Modeling Insights
Hamid: Throughput Gained versus Days Lost (TvD) in V2G Services Considering Multiple Battery Degradation Mechanisms, and The Case for DeepSOH: Addressing Path Dependency for Remaining Useful Life in Li-Ion Batteries
October 6-11, 2024
The group attended ECS PRiME (Pacific Rim Meeting), 2024 in Hawaii, where the following talks were presented:
Jason Siegel: (Keynote) on the Challenges and Opportunities for Parameterizing Multi-Physics Battery Models with Expansion Measurements
Vivian Tran: (Invited) Impact of Preload Compression and Aging on High-Temperature Li-Ion Battery Pouch Cell Venting
Zhiwen Wan, Sravan Pannala: Modeling Degradation to Predict Capacity and Cell Level Reversible and Irreversible Expansion throughout Life across Various Cycling Conditions
Apoorva Roy: Forecasting Electrode State of Health (eSOH) for Managing Battery Lifetime Using Domain-Knowledge-Informed Machine Learning
September 16, 2024
Our paper "Higher labor intensity in US automotive assembly plants after transitioning to electric vehicles" is now published open access in Nature Communications!
May 20, 2024
The group attended Cell Symposia: Technology barriers to electric vehicle implementation at University of Michigan.
Anna Stefanopoulou gave an invited talk titled "Battery Mechatronics: Decoding Battery Expansion from Manufacturing to End of Life". This invited talk will be a part of Session 2: Battery Management and Safety chaired by Jason Siegel on May 21.
Vivian, Omar, Jingchen, Zhiwen presented posters on Tuesday May 21:
Vivian: "Enhancing Safety by Predicting the Venting Timing of Abused Li-ion Batteries"
Omar: "30% fewer jobs in EV assembly plants: harbinger or myth?"
Jingchen: "Thermal Preconditioning of Electric School Buses During Cold Weather Operation"
Zhiwen: "Identification framework for degradation mechanisms in lithium-ion batteries with composite material electrodes"
Andrew, Clement, Hamid, Sravan presented posters on Wednesday May 22:
Andrew: "Battery formation modeling and end-of-line diagnostics: toward closed-loop battery manufacturing process control"
Clement: "Detection of high-risk imbalances in parallel-connected cell groups"
Hamid: "Benefit to harm (B2H) of bulk V2G operations "
Sravan: "Impact of applied pressure on cell irreversible dimensional changes as the cell ages"
May 20, 2024
Sravan, Hamid, Andrew, Vivian, and Zhiwen will be attending the 244rd ECS meeting in San Francisco! They will be giving multiple oral and poster presentations throughout the conference:
Session A02: Lithium-Ion Batteries:
Sravan: "Lifetime Predictive Model of Capacity Loss, Resistance Increase, and Irreversible Thickness Growth"
Session A04 - Battery Material Scale-up and Manufacturing
Session A05 - Cathode & Anode Materials
Zhiwen: "Impact of Pretension and Cycling Window on Degradation of Graphite/Silicon Composite Anodes"
April 16-17, 2024
We attended the SAE World Congress conference in Detroit!
Apoorva presented her talk "V2X Communication Protocols to Enable EV Battery Capacity Measurement: A Review".
Omar presented his talk "30% Fewer Jobs in EV Assembly Plants: Harbinger or Myth?".
Anna Stefanopoulou participated on the panel "How to apply technical skills and knowledge from traditional (i.e., fossil fuels) engine development to the development of components and management systems for alternative fueled engines, batteries and fuel cells?".
January 31, 2024
Clement's paper "Differential Voltage Analysis and Patterns in Parallel-Connected Pairs of Imbalanced Cells" was accepted to the 2024 American Control Conference in Toronto, Canada (July 8-12).
2023
2023
May 30, 2023
A new pre-print for our work titled "Phenomenological model of lithium-ion battery formation cycling and aging" is now available for download here.
May 28, 2023
Sravan, Jason, Andrew, Clement, and Everardo are attending the 243rd ECS meeting in Boston, MA! They will be giving multiple oral and poster presentations throughout the conference:
Session F02: Multi-Scale Modeling, Simulation, and Design
Andrew: "Phenomenological Model of SEI Formation and Growth Leveraging Real-Time Expansion Measurements" | Slides | Paper
Jason: "Using Reference Electrodes to Validate Parameterization of Individual Electrode Soh in the Single Particle Model with Electrolyte"
Session A02: Lithium-Ion Batteries:
Clement: "Voltage Differential Analysis during Power Discharge Operation in Energy Storage Systems"
February 12, 2023
Videos and slides from the ACC 2022 Battery Workshop are now available!
2022
2022
November 12, 2022
Anna gave the Saturday Morning Physics lecture Battery Management System: Engineering a Guardian Angel for Lithium-Ion Batteries. (according to the organizers, it was viewed 4.8k times within the first week).
Saturday Morning Physics, (the venue: Since 1995 The U-M Physics Department organizes Lectures designed for general audiences and open to the public. The Lectures are also recorded and are 1 hour long with 30 min of Q&A.
October 9, 2022
Sravan Pannala is going to present his work on "Impact of Data Window on Prediction of Battery Aging and Swelling" at ECS 242nd Meeting in Atlanta, GA
October 3-5, 2022
Our group has two papers for the 2022 Modeling, Estimation and Controls Conference in New Jersey
"Low-Cost Inductive Sensor and Fixture Kit for Measuring Battery Cell Thickness Under Constant Pressure" by Pannala et al. [video]
This paper was selected as a finalist for ASME Energy Systems Technical Committee (ESTC) Best Paper Award for MECC 2022
"Parallel-Connected Battery Current Imbalance Dynamics" by Weng et al.
September 29, 2022
Congratulations to Joe Drallmeier on his successful Dissertation Defense!
August 29-31, 2022
We have a paper for the 2022 IFAC Advances in Automotive Control (AAC) Conference in Columbus, OH (August 29-31) titled "A Fast Diagnostic to Inform Screening of Discarded or Retired Batteries" (Drallmeier et al.)
March 25, 2022
Anna was invited to serve at the Li-Bridge initiative, an effort coordinated by the US DoE to accelerate the development of a robust domestic supply chain for lithium-based batteries.
March 22, 2022
Congratulations to Dr. Eunjeong Hyeon on her successful Dissertation Defense!
March 10, 2022
Sravan Pannala passed his Dissertation Proposal Exam!
February 18, 2022
Joe Drallmeier passed his Dissertation Proposal Exam!
February 7, 2022
Jason Siegel was awarded the Kenneth M. Reese Outstanding Research Scientist Award for 2021-22 from the College of Engineering!
January 31, 2022
We have 5 papers accepted to the 2022 American Control Conference in Atlanta, GA (June 8-10), 2 for battery-related topics:
Methodology for Accelerated Inter-Cycle Simulations of Li-ion Battery Degradation with Intra-Cycle Resolved Degradation Mechanisms (Pannala et al.)
Equivalent Circuit Model for High C-Rate Discharge with an External Short Circuit (Tran et al.)
2021
2021
26 October 2021 We have 3 papers presented at the Modeling, Estimation and Controls Conference (MECC)!
Safe charging algorithms: In this paper, we present a PI controller-based charging algorithm that imposes varying levels of constraints on variables pertinent to degradation, such as plating potential and mechanical stress. Furthermore, we discuss how uncertainties can be accounted for by considering safety margins for the plating and stress constraints.
Modeling first venting: This study presents a model for CO2 gas generation and internal cell pressure at elevated temperature, which can be used to predict the amount of CO2 generated for setting detection thresholds and predict venting timing based on the buildup of cell internal pressure.
23 October 2021 Our research article on "Predicting the impact of formation protocols on battery lifetime immediately after manufacturing" has been published. In this work, we have identified a low-cost and scalable diagnostic signal for screening batteries for lifetime.
23 October 2021 Our research article on "Predicting the impact of formation protocols on battery lifetime immediately after manufacturing" is out in Joule! In this work, we have identified a low-cost and scalable diagnostic signal for screening batteries for lifetime.
9 July 2021 Our perspective on "The challenge and opportunity of battery lifetime prediction from field data" is out in Joule. We explore the benefit of using field data for better battery lifetime estimation and hence improved reliability, safety, extended usage, and reduced cost, and address some of the challenges [Twitter thread]
9 July 2021 Our perspective on "The challenge and opportunity of battery lifetime prediction from field data" is out in Joule. We explore the benefit of using field data for better battery lifetime estimation and hence improved reliability, safety, extended usage, and reduced cost, and address some of the challenges [Twitter thread]
5 May 2021 Peyman Mohtat will be defending his thesis, "Advanced Diagnostics for Lithium-ion Batteries: Decoding the Information in Electrode Swelling", on May 18th
7 April 2021 Ting Cai will be defending his thesis, "Detection of Lithium-Ion Battery Failure and Thermal Runaway", on Wednesday 7th
6 April 2021 Vivian Tran will be presenting at the BMWS Three-Minute Thesis competition on "Harnessing Battery Abuse for Deactivation and Reignition Prevention"
16 March 2021 Three of our students will be presenting at the 239th ECS conference (May 30 - June 3).
Abstract 1 | Abstract 2 | Abstract 3
24 January 2021 Two of our papers have been accepted in the 2021 ACC!
2020
2020
15 October 2020 A new article is up on ArXiv about "Promise and Challenges of a Data-Driven Approach for Battery Lifetime Prognostics", submitted for ACC 2021
8 October 2020 Valentin Sulzer presented at ECS PRiME 2020 on "Electrochemical Modeling of PEM Fuel Cells"
8 September 2020 Valentin Sulzer presented at the Battery Modeling Webinar Series on "Open-source battery modeling with PyBaMM"
29 July 2020 A new article is out in ECS on "Differential Expansion and Voltage Model for Li-ion Batteries at Practical Charging Rates"
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