n92-22756 - nasa€¦ · solar array =_ nickel cadmium (nicd) battery battery charge regulator -...
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1991 NASA Aerospace Battery Workshop
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Nickel-Cadmittm Technologies Session
https://ntrs.nasa.gov/search.jsp?R=19920013513 2020-04-24T00:03:45+00:00Z
1991NASAAerospaceBatteryWorkshop -326- Nickel-Cadmium Technologies Session
RESULTS OF DEEP DOD LIFECYCLE TESTS AT HIGH RATES
o_ ON 12Ah NiCd CELLS
JHU/APL spacecraft program -JANUS MISSION II=_ 2 year Low Earth Orbit (LEO) mission=_ Size and weight critical
Electrical Power System (EPS)Solar array
=_ Nickel cadmium (NiCd) batteryBattery charge regulator
- Voltage-temperature (V-T)limiting- Shunt excess array current
NiCd Battery
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High discharge rates (1.8C)Deep Depth-of-discharge (DOD)- 1500 cycles @ 70% DOD- 10000 cycles @ 20% DODLittle applicable performance data
:=_ Lifecycle test
1991 NASA Aerospace Battery Workshop -327- Nickel-Cadmium Technologies Session
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1991 NASA Aerospace Battery Workshop -328- Nickel-Cadmium Technologies Session
ORIGINAL PA(_E ISOF POOR QUALITY
1991 NASA Aerospace Battery Workshop
-329- Nickel-Cadmium Technoh_gies Sessioll
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OF POOR QUALITY
1991 NASA Aerospace Battery Workshop -330- Nickel-Cadmium Technologies Session
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1991 NASA Aerospace Battery Workshop -331- Nickel-Cadmittm Techm)h_gies Session
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1991 NASA Aerospace Battery Workshop -333- Nickel-Cadmium Technologies Session
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Nickel-Cadmium Technologies Session
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1.4JANUS LIFE TEST - FLIGHT2
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End of Discharge Voltages - After Recovery (_5)
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1991 NASA Aerospace Battery Workshop -335- Nickel-Cadmium Technologies Session
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# OF LOW LOAD CYCLES (BREAKS)
1991 NASA Aerospace Battery Workshop -336- Nickel-Cadmium Technologies Session
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1991 NASA Aerospace Battery Workshop -338- Nickel-Cadmium Technologies Session
COMPARISON OF V-T LIMITS
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1.46
1.44
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Temperature (Degrees C)
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COMPARISON OF V-T LIMITS
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Temperature (Degrees C)
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1991 NASA Aerospace Battery Workshop -339- Nickel-Cadmium Technologies Session
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1991 NASA Aerospace Battery Workshop -341- Nickel-Cadmium Technologies Session
1991 NASA Aerospace Battery Workshop -342- Nickel-Cadmium Technologies Session