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Evaluation program for secondary spacecraft cells: initial evaluation tests of general electric company 40.0 ampere-hour nickel-cadmium spacecraft cells for the tracking data relay satellite system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Harkness, J. D. |
| Copyright Year | 1978 |
| Description | Five cells provided by NASA's Goddard Space Flight Center were evaluated at room temperature and pressure (25 C plus or minus 2 C) with discharges at the 2 hour rate. Measurements of the cell containers following test, indicated an average increase of .006 inches at the plate thickness. Average end of charge voltages and pressures, and capacity output in ampere hours were determined. Three cells exceeded the voltage requirements of 1.52 volts during both c/10 charges at 20 C. All cells exceeded the voltage requirement of 1.52 volts during the 0 C overcharge test, although their end charges were below 1.50 volts. The pressure requirement of 65 psia was exceeded by both pressure transducer cells during c/10 charges at 25 C and 20 C and also during the 0 C overcharge test. The cells with pressure transducers reached a pressure of 20 psia before reaching the voltage limit of 1.550 volts during the pressure versus capacity test, and exhibited a pressure decay of 2 psia during the last 30 minutes of the 1 hour open circuit stand. Average capacity was 51.3 ampere hours. |
| File Size | 928155 |
| Page Count | 20 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800023381 |
| Archival Resource Key | ark:/13960/t3wt3gk3z |
| Language | English |
| Publisher Date | 1978-12-21 |
| Access Restriction | Open |
| Subject Keyword | Energy Production And Conversion Leakage Pressure Sensors Tables Data Electric Charge Electric Terminals Life Durability Tdr Satellites Capacitance Nickel Cadmium Batteries Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
