Pre-Recorded Webinars

Showing 41–44 of 141 results

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  The Role of All-Solid-State Batteries for Grid Energy Storage

  All solid-state batteries (ASSBs) are widely believed to be a promising technology for next-generation energy storage. While Li-ASSBs are slated to serve the electric vehicles market, Na-ASSBs are a promising technology for electrical grid storage due to their lowered costs and longevity. Prevailing obstacles to commercialization include poor cathode interfacial stability, and the lack of a robust sodium anode, in addition to low areal capacities. In this webinar, we will discuss design strategies to enable stable interfaces, as well as utilize sodium alloy-based anodes to enable ASSBs with higher energy densities, longer cycle life, and longer calendar life.

  This webinar will focus on the following key topics:

  • State-of-the-art Na solid-state batteries and their role for grid energy storage applications
  • Low cost, novel solid electrolytes enabling long cycle life via interface stabilization
  • Na alloy-based anodes eliminating dendrite formation and enabling wide temperature operation
  • Processing considerations to achieve high areal capacities for high energy densities

  Presenters
  Darren H. S. Tan – Co-Founder at UNIGRID LLC
  Dr. Erik A. Wu – CTO at UNIGRID LLC

  Darren H. S. Tan is a Co-Founder of UNIGRID LLC, an energy storage company based on cutting edge ASSB technologies. He is a PhD candidate leading the ASSB research work at UC San Diego at the Sustainable Power and Energy Center (SPEC).

  Dr. Erik A. Wu is the Chief Technology Officer of UNIGRID LLC, where he leads the development of Na-ASSBs for large scale grid energy storage applications, and is a recent alumnus of the Laboratory of Energy Storage and Conversion at UC San Diego.

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  Effects of Partial Nail Penetration on Li-ion Pouch Cell Operation

  While many technological advancements have recently been made to ensure Li-ion batteries operate safely during normal cycling, many hazards exist when it comes to operation in abusive environments. Physical damage to batteries can lead to decreased performance and increased operating temperatures. This often causes thermal runaway, which in severe cases can lead to combustion and possibly explosion. In order to design cells in a way that mitigates these dangerous outcomes, it is important to understand what happens when a battery experiences physical abuse and continues to operate. This work focuses on the operational effects and indications for cells that operate in abusive environments where physical damage can be a concern.

  This webinar will focus on the following key topics:

  • Dynamic impact testing on Li-ion pouch cells
  • Operational indications of cell damage
  • Quantifying accelerated capacity fade due to physical damage
  • Effect of increased operating temperature on coulombic efficiency
  • Incremental capacity analysis for investigation into aging mechanisms

  Presenter
  Casey Jones – Ph.D. Candidate at Purdue University

  Casey Jones is a PhD student in the School of Aeronautics and Astronautics at Purdue University, where he works in the Interfacial Multiphysics Laboratory for Dr. Vikas Tomar. His research focuses on destructive testing of Li-ion batteries and the characterization of the effects on cell operation and is funded by the Office of Naval Research. Prior to studying at Purdue he served in the US Navy as a nuclear electronics technician aboard a fast-attack submarine based in Pearl Harbor, and received his BS in Mechanical Engineering from the University of Hawai’i at Manoa.

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  Battery Safety Analytics

  Despite their unrivaled performance and longevity, Lithium Ion batteries (LIBs) are also increasingly recognized as a safety hazard, especially in large scale energy storage installations. Although high-voltage battery packs and modules can be subject to numerous failure modes which are not present at the single cell scale, safety testing on full-scale battery packs can be prohibitively expensive and highly destructive to perform. In this talk, we demonstrate the importance of combining safety testing at the material, cell, and module scales to enhance the design of cells and packs which may mitigate the potential for catastrophe. Strategies to minimize full-scale testing requirements through a combination of carefully designed single cell tests and physics-based modeling are explored.

  This webinar will focus on the following key topics:

  • Bridging the gaps between safety concerns at single cell and module levels
  • Experimental characterization of li-ion cells under abusive conditions
  • Use of reference electrode instrumentation for degradation mode characterization
  • Selection of safe battery materials to enhance cell and module level safety
  • Role of modeling in ensuring safe battery design

  Presenter
  Conner Fear – Senior Ph.D. Candidate at Purdue University

  Conner Fear is a senior Ph.D. candidate in the School of Mechanical Engineering at Purdue University. He is the laboratory manager of the Energy and Transport Sciences Laboratory (ETSL, https://engineering.purdue.edu/ETSL/), where he works under the guidance of Dr. Partha Mukherjee. Conner’s research interests include thermal safety and degradation of lithium-ion batteries, especially under extreme conditions such as fast charging and overdischarge. Throughout his studies, Conner has worked in the U.S. Naval Research Laboratory Chemistry Division with the team of Dr. Corey Love. His work is funded by the Office of Naval Research (ONR) Naval Undersea Research Program (NURP).

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  Thermal Runaway Testing and Cause Analysis of an Automotive Li-Ion Cell

  Part 1 focuses on the safety tests with large lithium-ion cells. We explain our test method and equipment to trigger and characterize a thermal runaway (TR). Then we present a case study with a large pouch cell which is brought into TR by over-temperature. We discuss the temperature curves, the voltage/resistance curves, gas releases and gas compositions.

  Part 2 covers composition analysis of large lithium-ion cells to interpret what happened during high temperature test. We also conduct thermal stability analysis of charged electrode to know the temperature when exothermic decomposition and oxygen release from cathode start. From that information, we can obtain key parameters to control thermal runaway from material design point of view.

  This webinar will focus on the following key topics:

  • Methods for safety tests of large lithium-ion cells
  • Thermal runaway of a large pouch cell caused by over-temperature
  • Detailed analysis of the gas, which is released during thermal runaway
  • Composition analysis of large scale lithium-ion cells
  • Thermal stability of charged electrode

  Presenters
  Yasuhito Aoki – Researcher at Toray Research Center
  Christiane Essl – Researcher at Virtual Vehicle Research GmbH
  Andrey Golubkov – Researcher at Virtual Vehicle Research GmbH

  Yasuhito Aoki is a researcher at Toray Research Center. He has been working on material analysis of Lithium ion battery using various instrumental analysis (mainly, Raman, FT-IR spectroscopy).

  Christiane Essl is a researcher at the Virtual Vehicle Research GmbH and an external PhD student at AUDI AG. She works on Battery Safety with the focus on vent gas analysis and early battery failure detection.

  Andrey Golubkov is a researcher at Virtual Vehicle Research GmbH. He has been working on thermal runaway testing of automotive Li-ion cells for 10 years.

  Toray Research Center and Virtual Vehicle Research GmbH are proud sponsors of this event.

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