9th Annual Battery Safety/14th Annual Lithium Battery Materials & Chemistries
Date: October 30 - November 2, 2018
Venue: Sheraton Pentagon City Hotel, Arlington, VA USA


Higher energy and higher use lead to higher risk. While research continues to boost the energy storage capability of lithium-ion batteries (LIBs) and leads to expanding applications and consumer use, the task of implementing effective safety strategies falls on regulatory authorities, cell manufacturers, R&D engineers, and forensic scientists. Accurate tests and models are critical for predicting and controlling the complex electrochemical, thermal, and mechanical behavior of LIBs while forensic investigations and regulations are required. The Battery Safety 2018 conference continues this vital dialogue to integrate and implement LIBs safety to meet ever-increasing energy demands.

Final Agenda

Tuesday, October 30

7:30 am Registration and Morning Coffee

Designing a Safer Battery

8:30 Organizer’s Welcome

Mary Ann Brown, Executive Director, Conferences, Cambridge EnerTech

8:35 Chairperson’s Opening Remarks

Alexej Jerschow, PhD, Professor, Department of Chemistry, New York University

8:40 FEATURED PRESENTATION: Cross-Platform Analysis to Improve Cell Design for Safety

Boryann Liaw, PhD, Department Manager, Energy Storage and Advanced Vehicles, Idaho National Laboratory

Idaho National Lab has developed a unique cross-platform analysis approach to decipher cell design limitations to help improve performance and safety aspects. This analytical approach will allow principle-based comparison among performance data and design parameters to pinpoint deficiencies in design verification or manufacturing processes, so the performance and safety control can be improved. The same approach can also help battery management to analyze data with insight of performance degradation.

9:15 A New Architecture for Safe Lithium-Ion Batteries Using Stable Separators and Unstable Current Collectors

Brian Morin, PhD, CEO, Soteria Battery Innovation Group

Here we present new lithium battery architecture in which it is impossible to create a spark. In this architecture, the metal foil current collectors have been replaced with polymer films that are coated with just enough metal to enable the battery to work, but not enough to create a spark. If a short occurs, the high current density causes the metal to burn out in microseconds, before enough heat is generated to light the cell on fire. In addition, the plastic separator is replaced with a thermally stable separator that, even if a short occurs, will never melt or shrink, isolating the short. There are two additional advantages: cost and weight.

9:45 Mechanically Triggered Battery Safety Mechanisms

Yu Qiao, PhD, Professor, Program of Materials Science and Engineering, University of California, San Diego

Without changing battery chemistry, by modifying current collectors, fracture mode of electrodes in a lithium-ion battery can be favorably adjusted to mitigate thermal runaway. Impact tests on pouch cells showed encouraging results.

10:15 Networking Coffee Break

10:45 Instrumented Commercial Lithium Batteries

Rohit Bhagat, PhD, FIMMM, Associate Professor, Head, Electrochemical Engineering Group, International Automotive Research Centre, WMG, University of Warwick

This presentation focuses on utilisation of embedded reference electrodes, fibre optics and sensors within commercial 18650 lithium-ion cells. These instrumented cells are then used to conduct in operando investigations of lithium battery safety by giving real-time information on the internal state of the battery.

11:15 Interface and Interphase in Solid and Liquid Electrolyte Li-Ion Batteries

Chunsheng Wang, PhD, Professor, Department of Chemical & Biomolecular Engineering, Department of Chemistry & Biochemistry, University of Maryland

11:45 Session Break

12:00 pm Luncheon Presentation (Sponsorship Opportunity Available) or Enjoy Lunch on Your Own

12:30 Session Break

Analyzing SOH/SOC

2:00 Chairperson’s Remarks

Boryann Liaw, PhD, Department Manager, Energy Storage and Advanced Vehicles, Idaho National Laboratory

2:05 Battery Characterization and SOC/SOH Estimation

Saeid Habibi, PhD, Director, Centre for Mechatronics and Hybrid Technologies (CMHT); Professor, Department of Mechanical Engineering, McMaster University

To optimize battery operation, it is important to monitor and estimate its State-of-Health (SOH) and State-of-Charge (SOC). These however cannot be directly measured, and need to be estimated. Model-based state and parameter estimation techniques are commonly used in SOC estimation, and are essential tools for information extraction. This presentation considers advanced testing strategies that could be used for characterization and modeling of batteries for SOC estimation.

2:35 State of Charge and State of Health Estimation Using Electrochemical Acoustic Time of Flight Analysis

Daniel Steingart, PhD, Associate Professor, Department of Mechanical and Aerospace Engineering, Andlinger Center for Energy and the Environment, Princeton University

3:05 Non-Destructive Diagnostics of Battery Cells by MRI

Alexej Jerschow, PhD, Professor, Department of Chemistry, New York University

We are presenting battery assessment technology based on non-destructive Magnetic Resonance Imaging (MRI) techniques. The approach works on intact, commercial rechargeable batteries (for example, Li-ion batteries) – no need to take the batteries apart. Moreover, the technique is fast, can detect changes in the electrode chemistry that occur as the battery is charged and discharged, or if it is damaged. The vision is to use a benchtop-type instrument, which could be deployed in a variety of ways. The aim is to improve safety and performance, and help predict battery life.

3:35 Networking Refreshment Break

Degradation and Lifecycle Prediction

3:50 Fatigue Life Prediction of a 12V Dual Li-Ion Battery in Vehicles

Kem M. Obasih, PhD, PE, Technical Leader - Thermal, Engineering Modeling & Simulation, Johnson Controls Advanced Power Solutions

Product durability and fatigue life must be evaluated by simulation and tests. Battery cyclic charges and discharges create thermal strains and stresses. Vibrational stresses occur during motive discharge. These cyclic thermal and vibrational stresses reduce the battery mechanical life. In this study, a prediction methodology is developed to predict battery fatigue life and the structural health of the battery systems.

4:20 Increasing Safety and Lifetime of Lithium-Ion Batteries by Understanding the Impact of Vibrations and Resonances

Philipp Berg, MSc, Research Associate, Department of Electrical and Computer Engineering, Technical University of Munich (TUM)

Safety is a big concern in lithium-ion battery research, but despite the huge number of publications about crash safety, for example, little research is published about the impact of vibrations. Therefore a three-column approach is chosen, based on structural dynamics characterization by modal analysis, real-world load profile testing and simulation to understand the unknown impact of vibrations on lifetime and safety of lithium-ion batteries. The preceding characterization has proven to be valuable, as for example high dependencies of structural dynamics on temperature and load level could be detected. The talk introduces the chosen method, how the characterization method enables us to make better design of experiments for load profile testing and the subsequent findings and results.

4:50 Thermal Runaway Predictors for Lithium-Ion Battery Safety

Rengaswamy (Srini) Srinivasan, PhD, Principal Professional Staff Scientist, Research and Exploratory Development, Applied Physics Laboratory, Johns Hopkins University

Lithium batteries exist by chemical consent, subject to change without notice. Some changes manifest as venting and fire. Frequency of such events can only be minimized, not eliminated through cell screening, cell matching, error-free handling during battery construction, and by well-designed battery management systems. Far more extraordinary measures are necessary to prevent any and all venting and fire.

5:20 Close of Day and Dinner Workshop Registration

5:30 - 8:30 Dinner Workshop*

W1: How to Qualify Your Batteries to Prevent Failures & Thermal Events

Instructor: Vidyu Challa, PhD, Technical Director, DfR Solutions

In this battery workshop, you:

  • Gain an understanding of lithium-ion battery failure mechanisms and the pathway to thermal runaway events
  • Learn about the top causes of battery field failures, and the major areas where you need to have mitigation strategies
  • Learn how cell design plays a critical role in battery safety and reliability, and what you can do from a design perspective to prevent these failures
  • Learn the basic steps in a lithium-ion cell manufacturing process, and the process controls required to ensure cell safety and reliability
  • Learn about the battery management system and its role in system safety
  • Come away with a checklist of things you should do to qualify your cell manufacturer – pass down requirements, trust but verify (design, manufacturing, compliance-based testing, system-level tolerances, application-specific battery testing, battery management system, cell CT scans and teardowns and lastly user education)

*Separate registration required.

Wednesday, October 31

8:00 - 9:00 am Battery Breakfast Breakout Discussion Groups

Grab coffee and breakfast and join a discussion group. These are moderated discussions with brainstorming and interactive problem solving, allowing conference participants from diverse backgrounds to exchange ideas and experiences and develop future collaborations around a focused topic.

Non-Invasive Testing Reveals Safety Strategies

9:15 Chairperson’s Remarks

Judith Jeevarajan, PhD, Research Director, Electrochemical Safety, Underwriters Laboratories, Inc.

9:20 Study of Structural Degradation Mechanisms in Lithium-Ion Battery Materials Using Multi-Length Scale and Electron Microscopy-Based Techniques

Alpesh Khushalchand Shukla, PhD, Senior Scientific Engineering Associate, National Center of Electron Microscopy, Lawrence Berkeley National Laboratory

Macroscopic degradation of cathode materials in lithium-ion batteries often starts with microscopic changes and it is important to study cycled cathode materials at the atomic level. In this talk, I demonstrate how use of multiple electron probe-based techniques such as 4DSTEM nanodiffraction mapping, electron energy loss spectroscopy, X-ray energy dispersive spectroscopy and high-angle annular dark-field imaging using scanning transmission electron microscopy were indispensable in understanding phase transformations in nickel-rich NMC materials that are responsible for the loss of capacity and reduced cycle life of batteries. High spatial resolution electron microscopy study of primary particles was complemented with 3D-focused ion beam serial sectioning of secondary particles that revealed separation of primary particles due to cycling.

9:50 Understanding Battery Reactions via Real-Time Electron Microscopy

Reza Shahbazian-Yassar, PhD, Associate Professor, Department of Mechanical and Industrial Engineering, University of Illinois at Chicago

This talk gives an overview on how transmission electron microscopy technique can provide insight about the charge storage mechanisms in Li-ion battery materials. In particular, we study the lithium storage mechanisms in SnO2, phosphorene, MoS2, and MnO2 materials.

10:20 Sponsored Presentation (Opportunity Available)

10:35 Coffee Break in the Exhibit Hall with Poster Viewing

11:15 Non-Destructively Locating Internal Short Spots in Lithium-Ion Batteries by Subsurface Electric Current Imaging

Kazuhiro Suzuki, PhD, Engineer, Evaluation and Analysis Technology Center, Toshiba Nanoanalysis Corporation

A traditional method such as lock-in thermography is inappropriate for locating internal electric short spots in lithium-ion batteries because they are covered with metallic electrodes. We here demonstrate a novel method to non-destructively visualize subsurface electric currents and locate internal short spots in lithium-ion batteries. Current images are computed from magnetic field distributions obtained with a magnetic field microscope.

11:45 Sponsored Presentation (Opportunity Available)

12:15 pm Session Break

12:30 Luncheon Presentation (Sponsorship Opportunity Available) or Enjoy Lunch on Your Own

1:00 Session Break

Mitigating the Risk of Thermal Runaway

2:00 Chairperson’s Remarks

Nancy Dudney, PhD, Group Leader and Corporate Fellow, Material Science and Technology Division, Oak Ridge National Laboratory

2:05 Measuring Influences on the Results of Nail Penetration Tests - Method Optimization and Impacts

Stefan Doose, Research Associate, Battery Process Engineering, Technische Universität Braunschweig

In this study a new test method with a low standard deviation is implemented and influencing parameters – e.g., the nail material, isolation material, and tension – are investigated with regard to their impact on the thermal runaway of lithium-ion batteries. Trends and differences of voltage drops as well as resulting heat and gas formation are shown and discussed.

2:35 Battery Electrodes Designed to Improve Safety upon Collision or Impact

Nancy Dudney, PhD, Group Leader and Corporate Fellow, Material Science and Technology Division, Oak Ridge National Laboratory

3:05 Sponsored Presentation (Opportunity Available)

3:20 Refreshment Break in the Exhibit Hall with Poster Viewing

4:00 Thermal Response and Chemical Kinetic Feature of Li-Ion Battery Thermal Runaway

Peng Zhao, PhD, Assistant Professor, Mechanical Engineering, Oakland University

A 3D computational study has been conducted to identify the critical state for Li-ion battery thermal runaway and the roles of heat source intensity, duration time, heat source size and battery thermal chemical properties during process. Heat release rate during internal short circuit is modeled using detailed electrochemistry, aiming to establish a fundamental-based comprehensive model for thermal runaway.

4:30 Evaluating the Impact of Initiation Methods on Propagating Thermal Runaway in Lithium-Ion Batteries

Joshua Lamb, PhD, Principal Member, Technical Staff, Advanced Power Sources R&D, Sandia National Laboratories

Despite interest in failure propagation testing, there is currently uncertainty surrounding how the method of thermal runaway initiation might impact the result. This work examines different abusive battery tests used to initiate single cell runaway within small strings of cells to better understand what factors are critical to the final results of a failure propagation test.

5:00 Thermal Runaway Propagation Studies for Lithium-Ion Cells

Judith Jeevarajan, PhD, Research Director, Electrochemical Safety, Underwriters Laboratories, Inc.

The presentation covers tests that have been carried out based on the ICAO/SAE G27 packaging standard to determine safety of lithium cell and battery packages as packaged for shipment. The tests included triggering cells at two different states of charge and characterizing propagation. Trigger cell locations within a package were varied and included the center, corner and side wall locations to understand and characterize propagation based on location of trigger.

5:00 Registration for Post-Incident Forensics & Investigations Symposium and Lithium Battery Materials & Chemistries Conference

5:30 Welcome Reception in the Exhibit Hall with Poster Viewing

6:30 Close of Battery Safety Conference

* The program is subject to change without notice, due to unforeseen reason.

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