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原文传递 Battery Technology Life Verification Testing and Analysis

题名：	Battery Technology Life Verification Testing and Analysis
作者：	Vince Battaglia;Ed Thomas;Ira Bloom;Gary L. Hunt;Jon P. Christophersen;
关键词：	batteries; life prediction; Monte Carlo; stress factors; uncertainty25 ENERGY STORAGE; AGING; COMMERCIALIZATION; FORECASTING; PERFORMANCE; TARGETS; TESTING; VALIDATION; VERIFICATION
摘要：	A critical component to the successful commercialization of batteries for automotive applications is accurate life prediction. The Technology Life Verification Test (TLVT) Manual was developed to project battery life with a high level of statistical confidence within only one or two years of accelerated aging. The validation effort that is presently underway has led to several improvements to the original methodology. For example, a newly developed reference performance test revealed a voltage path dependence effect on resistance for lithium-ion cells. The resistance growth seems to depend on how a target condition is reached (i.e., by a charge or a discharge). Second, the methodology for assessing the level of measurement uncertainty was improved using a propagation of errors in the fundamental measurements to the derived response (e.g., resistance). This new approach provides a more realistic assessment of measurement uncertainty. Third, the methodology for allocating batteries to the test matrix has been improved. The new methodology was developed to assign batteries to the matrix such that the average of each test group would be representative of the overall population. These changes to the TLVT methodology will help to more accurately predict a battery technology鈥檚 life capability with a high degree of confidence.
报告类型：	科技报告