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  • Determination of Battery Safety and Performance Parameters Using Adiabatic and Isothermal Calorimetry

    Wednesday, November 8, 2017 | 10:00 a.m. EST USA

    FREE Webinar – Thermal Hazard Technology is a proud sponsor of this event.

    This presentation describes two main types of calorimetry which can be used to carry out safety and performance testing on batteries. Isothermal calorimeters allow for direct heat measurement on cells during use, while adiabatic calorimeters can measure heat released from batteries during thermal runaway.

    Calorimetry can serve as a quantitative scientific method for evaluation of battery safety but it requires appropriate instrumentation. The principles of operation of both types of calorimeters are described along with specific applications within the field of battery testing.

    A combination of both technics allows for detailed thermal characterization of lithium-ion and other rechargeable cells, and differences due to chemistry, cell design, cell age, state of charge and cell size can be evaluated.

    This webinar will focus on the following key topics:

    • The principles of adiabatic and isothermal calorimetry
    • How calorimetry can be used in battery testing
    • Parameters established by adiabatic safety testing
    • Parameters established by isothermal performance testing
    • Pressure measurement and gas collection

    Danny Montgomery – Technical Performance Manager at Thermal Hazard Technology

    Danny Montgomery has worked at Thermal Hazard Technology for 9 years. His current role is Technical Performance Manager; overseeing the lab and technical aspects of instrumentation manufactured by THT. He joined the company in 2009 after graduating from Southampton University with a master’s degree in physics.

    Danny’s focus is primarily on lithium battery calorimetry; both adiabatic and isothermal. He oversees the use of calorimeters for customer sample testing as well as installing calorimeter systems and provided training for battery and automotive companies worldwide, such as Panasonic, BMW and Samsung. Danny works in Thermal Hazard Technology’s UK office in Milton Keynes.

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  • Why Lithium Ion Batteries Fail and What You Can Do About It – A Manufacturing and Design Perspective

    Wednesday, December 6, 2017 | 10:00 a.m. EST USA

    How can you be proactive and make sure your cell supplier is the right one and you don’t end up with thermal events and field failures? Is it enough to qualify a cell manufacturer according to industry standards? The answer is that the majority of compliance based testing is related to abuse tolerance. However, the vast majority of field failures do not occur under abuse scenarios, but happen under normal operating conditions due to manufacturing flaws or design and system tolerance issues that cause internal shorts. In this webinar, you will learn about common lithium ion battery failure modes and how to be proactive in preventing these.

    This webinar will focus on the following key topics:

    • Gain an understanding of lithium ion battery failure mechanisms and the pathway to thermal events
    • Learn how cell design impacts battery safety and reliability
    • Learn the basic steps in a lithium ion cell manufacturing process, and how the process controls affect safety and reliability
    • Come away with a checklist to qualify your cell manufacturer

    Vidyu Challa – Technical Director at DfR Solutions

    Vidyu Challa is Technical Director at DfR Solutions where she works on battery reliability and safety issues. Dr. Challa helps customers with their battery challenges including design reviews, manufacturing audits and supplier qualification. She obtained a PhD from CALCE Electronic Products and Systems Center at the
    University of Maryland. She has broad based expertise that includes engineering technology start-up experience, product development, R&D, and business development. Dr. Challa has published her work in journals, presented at conferences and written blog articles.

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