Thermal analysis of hermetically sealed nickel- cadmium cells for space applications

Preusse, K.; Shair, R.C.

doi:10.2514/6.1964-751

Cited by 3 publications

(4 citation statements)

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“…The average conductivity of a complete, discharged 20 A-hr celt in the x-direction (kx, perpendicular to plane of electrodes) is 0.0030 (cal/cm2/sec)/(C/cm) which may be compared with previously reported values of 0.0042, 0.0067, and 0.0020 (cal/cm2/sec)/ (C/cm) for 6, 6, and 12 A-hr cells, respectively (5)(6). On this basis, thermal conductivity is approximately independent of A-hr capacity of the cells, as indeed, it should be.…”

Section: Discussionsupporting

confidence: 73%

“…The y-direction conductivities for the Types I, II, and III cells are similar to each other, with an average value of 0.0065 cgs units. Conductivities in the y-direction.--The reported values for ky for nickel-cadmium cells range from 0.0035 to 0.052 cgs units (5)(6)(7)(8)(9)17), there seemingly being no correlation between the A-hr capacity of the cell and the conductivity value measured. Values obtained in this investigation range from 0.0056 to 0.0070 cgs units, and are higher by a factor of two than the range of values reported with one exception--the value for the Type III cell.…”

Section: Resultsmentioning

confidence: 98%

“…Conductivities in the x-direction.--The reported values for kx for nickel-cadmium cells range from 0.0016 to 0.0067 cgs units (5)(6)(7)(8)(9)17), with an average value of about 0.0042 cgs units. The measured values for the four types of 20 A-hr cells range from 0.0026 to 0.0086, with an average value of 0.0044 cgs units.…”

Section: Resultsmentioning

confidence: 99%

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Thermal Conductivity Measurements of Nickel-Cadmium Aerospace Cells

Brooman

McCallum

1971

J. Electrochem. Soc.

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Thermal conductivities of four types of sealed, 20 A‐hr nickel‐cadmium cells have been measured perpendicular to (x‐direction) and parallel with (y‐direction) the plane of the electrodes. The average conductivities for the discharged cells described are about 0.0030 and 0.0065 (cal/cm2/sec)/(C/cm) for these x‐ and y‐directions, respectively. Thermal resistance network models give reasonable quantitative agreement with the knormalx measurements using conductivity values of 0.0019, 0.0016, and 0.0011 (cal/cm2/sec)/(C/cm), determined in some preliminary experiments, for the wetted negative and positive electrodes and the separator, respectively. The thermal conductivity of the cells is found to change very little with state of charge.

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Section: Discussionsupporting

confidence: 73%

Section: Resultsmentioning

confidence: 98%

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Thermal Conductivity Measurements of Nickel-Cadmium Aerospace Cells

Brooman

McCallum

1971

J. Electrochem. Soc.

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“…The 100 ampere-hour cell, designated the VO-100 HSAD, is the largest hermetically sealed nickelcadmium cell that has ever been built, and the massive ceramic-to-metal seals are unique in size and construction. The dimensions of the VO-100 HSAD were calculated from a mathematical model previously described (4), to minimize the thermal resistance of the cell in three dimensions. Cell dimensions were designed to be: Figures 12 and 13 indicate a typical response to a C/4 (25 ampere) charge and four different discharge rates.…”

Section: Landrge Size Cellsmentioning

confidence: 99%