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    Calorimetric determination of the thermoneutral potential for Li/BrCl in SOCl2 (BCX) cells (1991)
    In:  CASI
    Details
    Publication Date: 2013-08-29
    Description: Proliferation of lithium cells into large modular battery packs are projected for future space applications. Assuring battery design safety while maintaining high energy density requires accurate and precise knowledge of the thermal parameters of the battery cell. Specifically, the thermoneutral potential was determined using heat conduction calorimetry on Li/BrCl in SOCl2 (BCX) DD-cells and compared to measurements obtained on Li/SOCl2 D-cells. Over 20 to 60 C, the Li/BCX cells were found to have a thermoneutral potential significantly higher (near 4.0 volts) than that for the Li/SOCl2 cells tested. The higher heat generation measured during discharge reflects the higher electrochemical polarization observed with the BCX cells.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA. Marshall Space Flight Center, The 1990 NASA Aerospace Battery Workshop; p 369-394
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Calorimetric determination of thermal parameters for the Li/BrCl in SOCl2 (BCX) chemistry (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The heat capacity of a Li-BCX DD-cell was found to be dependent on its state of charge by drop calorimetry measurements. The method of drop calorimetry involves measuring the energy (joules) gained or lost from a sample that is transferred from a bath at temperature A to one at temperature B. The thermoneutral potential is defined as the cell potential where the cell electrochemical reactions are neither exothermic nor endothermic. A Hart scientific calorimeter system, Model No. S77XX, designed for heat conduction calorimetry and drop calorimetry was used. Calorimetric analysis yielded a thermoneutral potential of 4.14 volts and a cell heat capacity dependent on the state of charge.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: International Power Sources Symposium; Jun 25, 1990 - Jun 28, 1990; Cherry Hill, NJ; United States
    Format: text
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    NASA TECHNICAL REPORTS
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