IEEE International Symposium on Product Compliance Engineering
The Institute of Electrical and Electronics Engineers (IEEE) will host the IEEE International Symposium on Product Compliance Engineering (ISPCE) 2021 virtually on September 20-24. Attendees will explore areas such as designing products for safe use; modern WIFI networks; compliance challenges; changes in European product law; artificial intelligence; human factors: warnings and instructions in automation; cybersecurity; global market access for radio equipment; electric shock hazard considerations; and lithium battery thermal runaway testing.
Francesco Colella, Ph.D., P.E., CFEI, Exponent senior managing engineer; Michael Barry, Ph.D., P.E., CFEI, Exponent managing engineer; and James Vickery, Exponent senior associate, will discuss their paper “Contact Burn Injuries: Experimental Assessments of Short Duration Contact Exposures” on Thursday, September 23, at 12:00-12:50 PM PT/3:00-3:50 PM ET. Their talk will focus on the quantification of contact burn injury risk as an important part of many product development cycles and hazard assessments for industrial processes. In their study, they conducted a series of experiments by taking thermesthesiometer measurements of different materials, with varying thicknesses, at different temperatures. They found that the risk of a burn injury occurring shows little dependence on the thickness of the material. They conclude that for short-term exposures, a surface temperature measurement of the object is likely sufficient to assess the risk of a burn injury occurring. However, for longer exposures with thinner materials, measurements confirm that the severity of the heat exposure decreases, likely due to the energy dissipating from the limited thermal mass of the object.
On Friday, September 24, at 8:00-8:50 AM PT/11:00 AM-11:50 AM ET, Keith M. Beers, Ph.D., P.E., Exponent principal engineer, will present his study “Lithium-ion Cell Failure Mechanisms and Mitigation Strategies.” In his presentation, Dr. Beers will provide a brief review of the fundamentals of lithium-ion battery technology, discussing the various mechanisms through which cells experience performance and/or safety issues and concluding with a discussion of strategies for mitigating the risk of such failures. Drawing heavily from the collective experience of a leading failure analysis firm that has been involved with numerous investigations into lithium-ion battery failures and recalls, Dr. Beers will cover many different product types from wearables to consumer electronics, automotive applications, and stationary storage.
In addition, Francesco Colella, Ph.D., P.E., CFEI, Exponent senior managing engineer, and May Yen, Ph.D., Exponent senior associate, will present "Contact Burn Injuries: Analytical Assessments of Thermal Damage in a Perfused Tissue" on Friday, September 24, at 9:00-9:50 AM/12:00 PM-12:50 PM ET. Their presentation will focus on the growing concern regarding burn hazard from consumer electronics and wearables, as consumers maintain increasingly constant contact with these technologies that dissipate heat. This long duration, low temperature contact with objects of relatively low thermal mass has the potential, under more severe exposure conditions, to cause thermal damage to the skin tissue. In the context of wearables or consumer electronics devices with low thermal mass, low initial temperatures, and long duration exposures, the amount of energy transferred to the skin during the initial time-dependent phases can be neglected, and a preliminary hazard assessment can be conducted relying on simplified heat transfer calculations for a perfused tissue. The speakers will present several novel, closed-form, heat-transfer solutions to simulate the behavior of a perfused tissue in contact with an object that dissipates heat.
Exponent’s Erwin K. Lau, Ph.D., P.E., CLSO, principal engineer, and Daren T. Slee, P.E. CFEI, senior managing engineer, will also be attending the symposium.
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