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Evaluation of Cycle Life and Characterization of YTP 45 Ah Li-Ion Battery for EMULi-ion batteries, with longer cycle life and higher energy density features, are now more and more attractive and applied in multiple fields. The YTP 45 Ah Li-ion battery has been evaluated here and may be employed in EMU in the future. Evaluations were on: (1) Cycle life tests - 500 cycles total (completed 40 cycles in simulated shuttle use mode and 460 cycles in an accelerated use mode, and recorded differential voltage of individual cell in battery); (2) Characterization test - discharge capacity measurement in environment temperature of -10, 25, 50 C before and after 500 cycles; and (3) Thermal testing - charge and discharge at 50 C and -10 C before and after 500 cycles. The battery showed less than a 9% drop of initial discharge capacity and energy within 500 cycles with 475 cycles 59% DOD plus 25 cycles 100% DOD. The EOD voltage ranged from 16.0 to 18.0 V, which fits the requirement for operating the EMU.
Document ID
20020060527
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Deng, Yi
(Lockheed Martin Space Operations Houston, TX United States)
Jeevarajan, Judith
(Lockheed Martin Space Operations Houston, TX United States)
Rehm, Raymond
(Lockheed Martin Space Operations Houston, TX United States)
Bragg, Bobby
(NASA Johnson Space Center Houston, TX United States)
Strangways, Brad
(Symmetry Resources, Inc. Arab, AL United States)
Date Acquired
August 20, 2013
Publication Date
February 1, 2002
Publication Information
Publication: The 2001 NASA Aerospace Battery Workshop
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
JSC-CN-7127
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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