( 電池の安全性 )
2023年3月21 - 22日
よりエネルギー密度の高い電池が市場に供給されるにつれて、最新技術の開発に対応して安全検査・規制を進歩させて、電池の安全機能を確保し消費者の便宜を図ることがますます重要となっています。今回の電池の安全性の部会では、国際電池セミナー・展示会の一部として、研究開発 (R&D) の大きな流れに対応するのに必要な、重要な電池規制・安全検査について検討します。監督官庁や関係機関、電池R&Dエンジニア、信頼性エンジニアが参集し、複雑化し続けるセル・パック設計に対する堅牢で信頼できる検査手法をどうやって開発しているのかを議論します。また、電池パックの安定性の維持や、熱暴走の緩和による安全性の改善といった議題も取り上げます。
Registration and Morning Coffee7:00 am
UNDERSTANDING INTERNAL SHORT CIRCUITS
Victoria Mosolgo, Conference Producer, Cambridge EnerTech
Investigating How Plastic Current Collectors Isolate Internal Shorts
Tests were performed inside our fractional thermal runaway calorimeter to quantify the heat transferred and its distributions and those runs done at a synchrotron yielded fascinating very high-speed X-ray videography. These show tolerance to nail penetration and activation of defect internal shorts and when thermally forced into thermal runaway, the heat output is significantly reduced.
Mitigating Internal Shorting to Enhance Battery Safety with Gradient-Conductivity Cathodes
Internal short circuits and the resulting catastrophic battery failure is difficult to detect and can occur under normal working conditions. To enable future high-energy density batteries, particularly lithium metal, an inexpensive internal short protection scheme is required. Here, we selectively remove conductive carbon from the cathode surface, creating a gradient-conductivity electrode.
Comprehensive Failure Analysis of Solid Electrolyte Cells
This presentation will focus on Solid Electrolyte (SE) cells and the Safety and Failure analysis considerations. The energy density of SE’s is the biggest draw since SEs are expected to satisfy energy and power requirements of electric vehicles and enabling electric aircraft. With increasing advancements in SE cells, it is important to have specialized abuse testing and failure analysis techniques that can determine performance and safety concerns.
Grand Opening Refreshment Break in the Exhibit Hall with Poster Viewing9:45 am
Influence of Different Thermal Runaway Triggers on the Failing Behavior of Automotive Lithium-ion Batteries
This presentation shows the setup and results of three different thermal runaway triggers on modern battery cells in a custom-made TR reactor. It focuses on the trigger overtemperature, overcharge, and nail penetration. The investigated cell types are state-of-the-art automotive cells. The results are discussed in three main categories: thermal behavior, vent gas production, and vent gas composition. The findings are supposed to be valuable for battery pack designers, testing institutions, and regulations.
Novel Aspects of Li-ion Battery Thermal Runaway: Cell Variability and Health Retention
In this talk, we will disseminate our recent results on cell variability during thermal runaway test., with statistical analysis. Thermal runaway suspension with health retention will also be discussed.
Thermal Runaway of Nonflammable Localized High‐Concentration Electrolyte
With continuous improvement of batteries in energy density, enhancing their safety is becoming increasingly urgent. Herein, practical high energy density LiNi0.8Mn0.1Co0.1O2|graphite-SiO pouch cell with nonflammable localized high-concentration electrolyte (LHCE) is proposed that presents unique self-discharge characteristic before thermal runaway (TR), thus effectively reducing safety hazards.
Concepts in Lean Methodologies lend naturally to safer, more efficient, battery testing. By creating a scenario for managing high-density testing in small batches, it increases safety and reduces cost per channel. Safety is increased by limiting propagation in the case of an event. Cost is reduced by utilizing standardized products.
Networking Luncheon12:30 pm
Dessert Break in the Exhibit Hall with Poster Viewing1:15 pm
PLENARY KEYNOTE PROGRAM
Delivering on Global Demand: Overcoming the Obstacles to Success
This international panel of the key OEMs, Battery Manufacturers, Raw Materials Providers, and Investment and Institutional Experts will take a deep dive into how the international battery community will deliver on the surging global demand for EVs. Addressing how the industry will achieve the volumes predicted is a key component to the success or failure of adoption of EVs around the world. The many issues that need to be addressed will include improvements needed to the supply chain, manufacturing capacity, mining, recycling methods, and regulatory compliance. The global battery industry is at a very important crossroads now that market demand has arrived. Will the industry be able to deliver? This unprecedented assembly of global experts will answer those questions and provide insight into the pathway forward.
SAFETY OF SECOND USE & CHEMISTRIES
Are Aged Cells More Dangerous than Fresh Cells?
By combining mechanical abusive testing and physics-based models on commercialized cells with various state-of-health and state-of-charge, we discovered that the ISC triggering delays with the decay of SOH and soft ISC mode will be triggered more frequently, mainly due to the mechanical behaviors of the current collectors. The peak temperature during the subsequent TR also becomes milder for aged cells due to the reduced capacity and deterministic soft ISC process.
Battery Safety Analytics
Battery safety fundamentally relies on the underlying electrochemical-chemical-thermal interactions, involving complex interfaces and degradation mechanisms. Dependent on the battery chemistry and reaction pathways, intrinsic factors including the stability of the electrode/electrolyte interfaces, interphase growth, morphological behavior, and oxygen release has a distinct effect on the thermal stability response. In this presentation, a mechanistic framework, synergistically integrating electrochemical analytics, calorimetry, and physics-based modeling to probe the critical role of degradation-safety interactions will be discussed.
Thermal Study of Lithium Titanate Oxide-Based Lithium-ion Batteries
A precise interpretation of Lithium-ion Battery (LIB) heat generation is indispensable for different applications including electric vehicles. The internal resistance of a lithium titanate oxide-based LIB was determined at different state of charge (SOC) levels and current rates to understand the relationship between internal resistance and heat generation. Random and different pulse discharge current step durations were applied to consider the effect of different SOC interval levels on the heat generation. The total generated heat was measured for different discharge rates and operating temp.
Reception in the Exhibit Hall with Poster Viewing5:15 pm
INTERACTIVE ROUNDTABLE DISCUSSIONS
Roundtable discussions are informal, moderated discussions with brainstorming and interactive problem-solving, allowing participants from diverse backgrounds to exchange ideas and experiences and develop future collaborations around a focused topic.
TABLE 1: Battery Raw Materials Supply Chain
Moderator: Robert M. Privette, Manager, Business Development, Rechargeable Battery Materials North America, Umicore USA, Inc.
TABLE 2: Li-ion NMC Fast Charging New Cells for E-Mobility
Moderator: Shmuel De-Leon, CEO, Shmuel De-Leon Energy Ltd.
TABLE 3: Li-ion Battery Safety: Prediction, Prevention, Levels and Legalities
Moderator: John Zhang, PhD, Senior Technology Executive Officer, Asahi Kasei SSBU Polypore, Celgard LLC
TABLE 4: Electrolyte Developments: New Components and Approaches
Moderator: Sam Jaffe, Vice President, Battery Solutions, E Source
TABLE 5: Battery Pack System Cost and Safety - Will Future xEV Battery Packs Increase in Complexity or Simplify and How Will Cost and Safety Be Impacted?
Moderator: Kevin Konecky, Battery and Energy Storage Systems Consultant, Total Battery Consulting
TABLE 6: Innovations in Recycling Battery Materials & Second Life
Moderator: Steven E. Sloop, President, OnTo Technology LLC
TABLE 7: Battery Management Systems
Moderator: Sheldon Williamson, PhD, Professor & Canada Research Chair, Electrical & Computer & Software Engineering, University of Ontario Institute of Technology
TABLE 8: Regulatory Initiatives & Transportation Safety
Moderator: Mike Pagel, Senior Consultant, Hazmat Safety Consulting
TABLE 9: Fire Safety Response
Moderator: Michael O'Brian, CEO, Code Savvy Consultants and Fire Chief, Brighton Area Fire Department
TABLE 10: Multi-Scale and Multi-Physics Modeling
Moderator: Lin Liu, PhD, Associate Professor, Mechanical Engineering, University of Kansas
TABLE 11: Using Synchrotron Tools to Build the Batteries of the Future at Canadian Light Source
Moderator: Jigang Zhou, PhD, Senior Industrial Scientist, Industry Services, Canadian Light Source, Inc.
TABLE 12: Safety in Transporting End of Life or DDR Batteries
Moderators: Joshua Davis, Scientist, U.S. Department of Transportation and Andrew Leyder, Program Analyst, Research, Development & Technology, U.S. Department of Transportation
TABLE 13: Requirements for Comprehensive Physical Characterization of Electrodes and Separators
Moderator: Martin Thomas, PhD, Lead Scientist, Product Competence, Anton Paar QuantaTec
TABLE 14: Energy Storage for the Grid
Moderator: Susan Babinec, Program Lead, Stationary Storage, Argonne Collaborative Center for Energy Storage Science (ACCESS), Argonne National Laboratory
Close of Day7:15 pm
Registration and Morning Coffee7:25 am
Breakfast Opener - Sponsorship Opportunity Available8:00 am
Regulatory Initiatives that Can Impact Your Ability to Manufacture and Transport Lithium Batteries
This presentation will cover the regulatory safety initiatives that are ongoing to develop a packaging standard for lithium batteries transported by aircraft and to regulate lithium batteries based on their inherent hazards including their ability to propagate from cell to cell and how violent they react when forced into thermal runaway.
Experimental and Numerical Study on the Burning Behaviors of Lithium-ion Batteries during Thermal Runaway
The presentation will start with a series of fire experiments using cylindrical and pouch Lithium-Ion Battery (LIB) cells. Venting gas compositions, venting rates, and fire behaviors will be compared in detail between different cell States of Charge (SOC). We will then present the concept and methodology to develop a physics-based numerical model for LIB fires using the data obtained in the experiments. Preliminary modeling results will also be shared.
To facilitate integration of batteries into different applications, battery developers should ensure the conformance of their products to safety standards. Will review these safety considerations and outline the testing equipment that are traditionally used to test and certify safety conformance. We will then discuss the innovations that Bitrode is incorporating in its next generation of battery cyclers to facilitate and to streamline safety-related testing procedures in every stage of battery development.
Coffee Break in the Exhibit Hall with Poster Viewing10:00 am
NFPA 855: Explosion Control for Li-ion BESS
With code requirements in NFPA 855 for explosion control, the mitigations for achieving this vary greatly in both complexity and reliability. We will discuss best practices emerging for deflagration prevention designs for BESS cabinets.
Lithium-ion Battery Fire Suppression - Module-Level Study
When abused, lithium-ion batteries can go into thermal runaway, leading to smoke, fire, and high temperatures. Once ignited, lithium-ion battery fires can be difficult to extinguish, and re-ignitions are frequently observed. In this talk, we will summarize the experiments conducted with three different fire suppressants (water, nitrogen gas, and potassium-based aerosol) and lithium-ion modules of two different chemistries.
Networking Luncheon (Sponsorship Opportunity Available)12:45 pm
Dessert Break in the Exhibit Hall with Poster Viewing2:15 pm
PLENARY KEYNOTE PROGRAM
If a Lithium-ion Cell Can Operate for More Than 6 Months at 85°C How Long Can It Last at Ambient Temperature?
In a few of our recent papers, we have presented Li-ion cell designs with liquid electrolytes that give astounding lifetime at temperatures as high as 85°C. In fact, we have been testing these cells now at 100°C and they are operating well for more than one month so far. I will discuss what is required to make such awesome cells and then consider what their lifetime at ambient temperature might be. I will show that the energy density of these cells is very reasonable and that Co-free moderate-nickel designs also work equally well.
Next-Generation Batteries - An Update on Li Metal Battery and All Solid-State Battery
With the recent success in deploying lithium-ion batteries for light-duty passenger cars, it is time for researchers and scientists to work on a road map of next-generation batteries beyond lithium-ion. In this talk, I will give an update on the current status of research efforts in enabling lithium metal batteries and all solid-state batteries. A few cutting-edge scientific tools will be introduced, including X-ray CT, Cryo-EM, Titration GC, and more, all aimed at quantitative understanding of the failure mechanisms of next-gen batteries.
Refreshment Break in the Exhibit Hall with Poster Viewing4:00 pm
Close of Battery Safety Conference4:30 pm