In-Person Posters 

Wednesday-Friday in the Exhibit Hall     Poster Session for our In-Person Poster Presenters
Marriott Tysons Corner, Salon IV

P1: Enthalpic Reaction Limits of Lithium Ion Battery Chemistries
Presented by Jacob F., Auburn University
Theoretical heats of reaction can be been calculated for Li-ion battery thermal degradation based on a main reaction pathway. These values are compared with experimental reaction enthalpies. A worst-case scenario failure can be predicted by these heats of reaction if the battery is failed in an ambient atmosphere and with external propane fire as the failure mode.

P2: Needle Penetration Studies on Automotive Lithium-Ion Battery Cells
Presented by Hyojeong K., BMW Group
Thermal runaway can be enabled when the heat dissipated from internal short circuit (ISC) leads to a failure of separator. In prismatic cells, a crucial type of ISC is located between the cell can on cathode potential and the outermost anode layer. In this study, we investigate this critical short circuit introduced by needle penetration and assess the influence of safety device on thermal runaway.

P3: Analysis of Contamination of Infrastructure and Water Caused by EV Battery Fire
Presented by Marcel H., Empa - Swiss Federal Labs for Materials Science and Technology
Three different test scenarios of EV lithium-ion battery fires in enclosed spaces enable quantitative chemical analysis of contamination of the cold fire site. The results show the composition of toxicologically relevant contaminants on surfaces, textile protective equipment and sprinkling water, the effects of residues on electronic equipment and the corrosiveness to typical metals. The substances searched for include heavy metals, anions, cations, halogens, various acids and organic substances (PAHs, PCBs, PCDDs/PCDFs).

P4: Triggering of Thermal Runaway by Thermal and Mechanical Abuse of Cylindrical Lithium-Ion Batteries
Presented by Ijaz M., Karlsruhe Institute of Technology
Thermal runaway was triggered by two abuse methods, both using Accelerating Rate Calorimetry (ARC). The Heat-Wait-Seek (HWS) test represented thermal abuse and allowed to study exothermal reaction temperature rates. They were evaluated and compared for different cathode materials and states of charge. In addition, nail penetration tests were performed, which represented mechanical abuse by puncturing and short-circuiting the cell with a steel nail, accompanied by temperature and video recording.

P5: Measuring Heat Generation in Post Lithium (Na, Mg) Batteries by 3D-Calvet MS80 Calorimeter: An Experimental Approach
Presented by Ijaz M., Karlsruhe Institute of Technology
In a thermal management system where total heat generation during cycling is one of the most salient features and controls the temperature of each cell/battery pack is of interest. Therefore, in this respect, total heat generations were investigated by a 3D-Calvet MS80 calorimeter (Setaram, France) under isothermal conditions at 25 °C in sodium and magnesium batteries. The analysis had shown that the dominant heat sources during charging-discharging were caused by mainly joule heat. Thermal data and various resistances by electrochemical impedance spectroscopy give a relationship to calculate the individual heat.

P6: Detection of Metallic Foreign Matter by Ultra-Sensitive Magnetic Sensor
Presented by Saburo T., Toyohashi University of Technology
Magnetic metallic contaminant detector using multiple high-Tc SQUID gradiometers for battery products has been developed. Finding ultra-small metallic contaminants is a big issue for manufacturers producing commercial products. We present the multi-channel high-Tc SQUID gradiometer system for inspection of a lithium ion battery cathode with width of at 60 mm to 70 mm wound on a roll. As a result, small iron particles of about 27 micron in a cathode sheet were successfully measured.

P8: Next Advanced Batteries - Replacement of Graphite, Silicon, and Lithium Metal Anodes in Lithium-Ion Batteries with Safer Binder Free Iron Oxide Anode
Presented by Eugenia A-N., NanoResearch, Inc.
Silicon and lithium metal anodes have higher specific capacities than graphite. However, silicon and lithium anodes have safety anxieties arising from continuous volume expansions creating pressure on battery cells, hence modules and packs. These occur throughout the life of the battery posing unpredictable safety challenges to electric vehicle manufacturers causing expensive vehicle crash safety designs. The objective is to present a substitute high-capacity iron oxide anode with predictable safer profile.

P9: Early Prediction of Battery Lifetime Under Group-Varying Cycling Conditions
Presented by Tingkai L., Iowa State University
Accurately predicting battery lifetimes using early-life data enables new and rapid optimization of their manufacturing, design, and control. However, early prediction is challenging because cells typically show minimal capacity fade in the early cycles, and their future degradation trajectories are often nonlinear. This work investigates data-driven methods for predicting battery lifetime under different cycling conditions. By combining general usage features and features derived from early-life data, the accuracy of predicting a cell’s lifetime increased by an average of 15.5% absolute error.



Virtual Posters

ONLINE Friday, 12:30 pm             Poster Session for our Virtual Poster Presenters in Toucan
Poster sessions are an opportunity for our virtual attendees to network and for our virtual poster presenters to present their work to our virtual attendees with the Toucan platform. The link to join this session will be posted in the virtual meeting rooms when we come to this point in the agenda.


V1: Wide Tab Design to Improve Cell's Thermal Stability
Presented by Jingyuan L., General Motors
We designed and verified various tab designs, to explore affection of tab width and position to cell's electrochemical performance and thermal stability. Simulation tools were applied to investigate various designs and verified by experiment. Cell's hot spot positions were explored by simulation tools under various working conditions.

V2: Examination and Modeling of Thermal Runaway on Li-Ion Battery Impact of Chemistry, SOC and Aging
Presented by Sara A., IFP Energies Nouvelles
Thermal Runaway (TR) of LiBs is the key of the safety. It involves multi-scale phenomena ranging from internal physic-chemical mechanisms to battery components including safety features (CID, Pressure disk, vent) and further to the thermal propagation. At IFPEN a Multiphysics Multiscale model is developed able to simulate the cell behavior under different initiation event (overheat, overcharge, short circuit). The impact of chemistry, SOC and aging are studied.

V3: Beyond Aging Test: Next-Generation Pre-Shipping Quality Control System Using Electric Current Distribution Visualizing Technology
Presented by Kenjiro K., Kobe University
Beyond aging test, we have firstly succeeded in finding an analytical solution against inverse problem from magnetic field leaking outside the battery to electric current inside one, which is directly connected to the safety and electrical characteristics of the battery. We show the method of non-destructive imaging technology and the result of electric current density distribution inside lithium-ion battery for next-generation pre-shipping inspection.

V4: Influence of Lithium Metal Deposition on the Thermal Stability: DSC Analysis of Cyclic Aged Lithium Metal Batteries
Presented by Lukas H., University of Muenster, MEET Battery Research Center
In this study, lithium metal batteries based on liquid electrolyte were investigated in order to understand the influence of the lithium metal deposition (formation of high surface area lithium) behavior on the thermal stability of the cell. Therein, cells were cycled to different SOCs and/or SOHs before analysis via DSC and cryo-FIB-SEM to determine onset temperature and evolving heat on component and cell level in correlation with lithium metal deposition morphology and amount.

V5: In-Situ Test Rig for Battery Abuse Testing with High-Speed X-Ray Imaging
Presented by Jonas P., Fraunhofer EMI
Due to the high energy density of lithium-ion batteries, the investigation of failures is challenging because of the associated hazards. To safely perform such experiments, a test chamber suitable for high-speed X-ray imaging was developed. It provides the ability to perform robust in-situ abuse testing on batteries in various configurations through a heat-resistant and gas-tight design, while gaining a complete overview of the failure event with additional complementary measurement methods.

V6: New Passive Thermal Management for xEV Li Ion Battery
Presented by Sam K., DuPont Water and Protections
High EV growth is expected in emerging markets (e.g. China, Japan, Europe), where double digit growth has been evident in the last 5 years in large drives. Increasing market demands for EV, has made lithium ion battery system a requirement and needs high power density within limited space. The safety problem of lithium ion battery is mainly contributed by thermal runaway caused fire and explosion. To efficient protection of thermal runaway, novel DuPont thermal management system has been suggested with multi-functional economic solutions including flame barrier, thermal insulation and mechanical protection.

In-Person Poster Presentations will be held IN-PERSON ONLY at the event venue.   Virtual Poster Presentations will be held VIRTUALLY ONLY during the event.