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  • 1
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    Performance of Li-Ion Cells Under Battery Voltage Charge Control (2002)
    In:  CASI
    Details
    Publication Date: 2017-09-27
    Description: Li-ion cells manufactured by YTP, SAFT, and MSA have completed 6714, 6226, and 3441 cycles, respectively. An increase in the charge voltage limit was required in all cases to maintain the discharge voltage. SAFT and MSA cells were capable of cycling at -10 C and 0 C with an increase in the charge voltage limit, whereas Yardney cells could not be cycled. Reconditioning improved the discharge voltage of SAFT and MSA cells; it is important to note that the effect has been temporary as in Ni-H and Ni-Cd batteries. It was demonstrated that the charge operation with VT clamp at battery rather than at cell level is feasible. Continuation of testing depends on the health of the cells and on the funding situation.
    Keywords: Electronics and Electrical Engineering
    Type: The 2001 NASA Aerospace Battery Workshop; NASA/CP-2002-211466
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    NASA/GSFC Testing of Li-Ion Cells: Update (2001)
    In:  CASI
    Details
    Publication Date: 2017-09-27
    Description: This viewgraph paper presents a report on the ongoing testing of Lithium Ion (Li-Ion) cells. Characterizes cells according to capacity, self-discharge, and mid-discharge voltage. Determines the cycling performance of Li-Ion cells as batteries according to number of cycles, charge voltage, and temperature.
    Keywords: Electronics and Electrical Engineering
    Type: The 2000 NASA Aerospace Battery Workshop; NASA/CP-2001-210883
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Crane Cell Testing Support of Nasa/goddard Space Flight Center: an Update (2001)
    In:  CASI
    Details
    Publication Date: 2014-10-07
    Description: The objective of this paper is to verify the quality and reliability of aerospace battery cells and batteries for NASA flight programs, disseminate the data - to develop a plan for in-orbit battery management - to design a cell/battery for future NASA spacecraft and establish a cell test data base for rechargeable cell/batteries.
    Keywords: Electronics and Electrical Engineering
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    AEA Cell-Bypass-Switch Activation: An Update (2002)
    In:  CASI
    Details
    Publication Date: 2017-09-27
    Description: The objectives of this project included the following: (1) verify the performance of AEA cell bypass protection device (CBPD) under simulated EOS-Aqua/Aura flight hardware configuration; (2) assess the safety of the hardware under an inadvertent firing of CBPD switch, as well as the closing of CBPD; and (3) confirm that the mode of operation of CBPD switch is the formation of a continuous low impedance path (a homogeneous low melting point alloy). The nominal performance of AEA CBPD under flight operating conditions (vacuum except zero-G, and high impedance cell) has been demonstrated. There is no evidence of cell rupture or excessive heat production during or after CBPD switch activation under simulated high cell impedance (open-circuit cell failure mode). The formation of a continuous low impedance path (a homogeneous low melting point alloy) has been confirmed.
    Keywords: Electronics and Electrical Engineering
    Type: The 2001 NASA Aerospace Battery Workshop; NASA/CP-2002-211466
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Study of Capacity and Voltage Degradation in Nickel-Hydrogen Cells (2004)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The objective of this study is to understand the causes of the nickel hydrogen (NiH2) cell degradetion: storage, cycling, and reversal.
    Keywords: Electronics and Electrical Engineering
    Type: Space Power Workshop; Apr 19, 2004 - Apr 22, 2004; Manhattan Beach, CA; United States
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    NASA TECHNICAL REPORTS
  • 6
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    Effect of Handling, Storage and Cycling on Ni-H2 Cells: Second Plateau Phenomenon (2000)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A viewgraph presentation outlines the effects of handling, storing, and cycling of NiH2 cells, particularly the second plateau phenomenon. Details are given on the criteria for cell selection, cell history, the second plateau capacity at C/2 discharge, and cell reversal test conditions. Tables display a gas analysis and nickel precharge.
    Keywords: Electronics and Electrical Engineering
    Type: 2000 NASA Aerospace Battery Workshop; Nov 14, 2000 - Nov 16, 2000; Huntsville, AL; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    AEA Technologies Battery Cell By-pass Device Activation: An Update (2001)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: The objectives are to: (1) Verify the Performance of AEA Cell Bypass Protection Device (CBPD) under simulated EOS-Aqua/Aura flight hardware configuration; (2) Assess the Safety of the hardware under an inadvertent firing of CBPD switch, as well as the closing of CBPD switch under simulated high cell impedance; and (3) Confirm that the mode of operation of CBPD switch is the formation of a continuous low impedance path (a homogeneous low melting point alloy).
    Keywords: Electronics and Electrical Engineering
    Type: 2001 NASA Aerospace Battery Workshop; Nov 27, 2001 - Nov 29, 2001; Huntsville, AL; United States
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    NASA TECHNICAL REPORTS
  • 8
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    NiH2 Cycle Life Study (2002)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: Cycle life studies have been performed at Eagle Picher Technologies (EPT), on HST Mantech design cells with various pedigrees of slurry and dry sinter processed electrodes, to evaluate peak load voltage performance during generic load profile testing. These tests provide information for determining voltage and capacity fade (degradation) mechanisms, and their impact on nickel hydrogen cell cycle life. Comparison of peak load voltage fade, as a function of State of Charge and cycle life, with capacity data from HST indicates that the cycle life limiting mechanism is due to impedance growth, and formation of a second discharge plateau. With a second plateau on discharge, capacity from the cell is still available, but at an unacceptable low voltage of 0.8 V per cell (17.6 V battery). Data shows that cell impedance increases with cycle number and depth of discharge, as expected.
    Keywords: Electronics and Electrical Engineering
    Type: 2002 NASA Aerospace Battery Workshop; Nov 19, 2002 - Nov 21, 2002; Huntsville, AL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Design, Build and Qualification of 28 Volt Lithium-Ion battery (2003)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: Contents include the following: 1. GSFC performance specifications requirements. 2. AEA philosophy: battery configuration. 3. AEA battery design: SONY cell, cell screening, 20Ah and 60Ah. 4. Testing: 20Ah battery qualification (environmental); 60Ah battery LEO life cycle. 5. Conclusion.: summary and lessons learned.
    Keywords: Electronics and Electrical Engineering
    Type: 2003 NASA Aerospace Battery Workshop; Nov 18, 2003 - Nov 20, 2003; Huntsville, AL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Super NiCd Open-Circuit Storage and Low Earth Orbit (LEO) Life Test Evaluation (2002)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This presentation discusses Air Force tests performed on super NiCd cells to measure their performance under conditions simulating Low Earth Orbit (LEO) conditions. Super NiCd cells offer potential advantages over existing NiCd cell designs including advanced cell design with improved separator material and electrode making processes, but handling and storage requires active charging. These tests conclude that the super NiCd cells support generic Air Force qualifications for conventional LEO missions (up to five years duration) and that handling and storage may not actually require active charging as previously assumed. Topics covered include: Test Plan, Initial Characterization Tests, Open-Circuit Storage Tests, and post storage capacities.
    Keywords: Electronics and Electrical Engineering
    Type: 2002 Space Power Workshop; Apr 22, 2002 - Apr 25, 2002; Redondo Beach, CA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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