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Li-ion cells for terrestrial robotsSAFT prismatic wound 5 Ahr MP series cells were evaluated for potential application in a lithium ion battery designed for Tactical Mobile Robots (TMR). In order to satisfy battery design requirements, a 10 Ahr battery containing two parallel 8-cell strings was proposed. The proposed battery has a weight and volume of approximately 3.2kg and 1.6 liters, respectively. Cell qualification procedures include initial characterization, followed by charge/discharge cycling at 100% DOD with intermittent EIS measurements at various state of charge. Certain cells were also subjected to extreme operational temperatures for worst-case analysis. Excellent specific energy (>130 Whr/kg) was obtained with initial characterization cycles. Even at abusive thermal conditions, the cell capacity fade was less than Ahr after 300 cycles. Rate characterization showed good cell discharge behavior with minimal decrease in capacity. At various state of charge, impedance measurements suggest that the cathode play a more significant role in capacity. At various state of charge impedance measurements suggest that the cathode play a more significant role in capacity fade than the anode.
Document ID
20060043910
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Chin, Keith B.
Smart, M. C.
Narayanan, S. R.
Ratnakumar, B. V.
Whitcanack, L. D.
Davies, E. D.
Surampudi, S.
Raman, N. S.
Date Acquired
August 23, 2013
Publication Date
October 11, 2003
Subject Category
Cybernetics, Artificial Intelligence And Robotics
Meeting Information
Meeting: 204th Conference of Electrochemical Society
Location: Orlando, FL
Country: United States
Start Date: October 11, 2003
End Date: October 18, 2003
Distribution Limits
Public
Copyright
Other
Keywords
robots
lithium batteries

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