《UL_Lithium Batteries》.pdfVIP

NEW SCIENCE SUSTAINABLE ENERGY LITHIUM-ION BATTERIES • APPLYING FAULT TREE ANALYSIS METHODOLOGY • INDENTATION INDUCED ISC TEST • ADVANCING LITHIUM-ION BATTERY STANDARDS • AGING EFFECTS ON LITHIUM-ION BATTERIES JOURNAL ISSUE ll UL.COM/NEWSCIENCE NEW CHALLENGES CALL FOR NEW SCIENCE Progress is an unstoppable, transformative force. New technologies, product advances and globalization are arriving one on top of another at a dizzying pace. Innovation makes us more efficient, more productive and more connected. But there is a cost, and that cost is risk. To help mitigate the emerging risks, UL is developing New Science. Through fundamental discovery, testing methodologies and equipment, procedures, software and standards, UL is creating new and important ways to make the world a safer place. NEW SCIENCE: SUSTAINABLE ENERGY 2 SUSTAINABLE ENERGY LITHIUM-ION BATTERIES OVERVIEW Our Lithium-ion Batteries journal covers four key subjects that demonstrate how UL is working to enhance the safety of lithium-ion batteries. Fault Tree Analysis is the foundation of how we approach lithium-ion battery safety — by identifying and understanding the root causes of failures. We found that one of the leading causes of failure is an internal short circuit (ISC), so we developed a simple and repeatable way to induce ISCs. The Indentation Induced ISC test enables us to study battery behaviors when an ISC occurs. This and related research has given us insights that we’ve used to update existing standards and create new ones to address the most recent applications of lithium- ion batteries. Finally, a new area of potential concern, Aging Effects, is a significant area we are focusing on, given the trend toward longer battery life and second-use applications for lithium-ion batteries. APPLYING FAULT TREE ANALYSIS METH