Experimental lithium-ion battery developed for demonstration at the 2007 NASA Desert Research and Technology Studies (D-RATS) program

Original publisher: Cleveland, Ohio : National Aeronautics and Space Administration, Glenn Research Center, [2010] OCLC Number: (OCoLC)747837269 Excerpt: ... 17 6 17 5 Day 1 Volts Cinder Lake 9 / 10 / 2007 16 Day 2 s16 Battery JPL2-1 on Mark III ltSuit 5 4 Day 3 Vo 15 15 4 14 3 14 13 3 2 12 13 Amps Amps 2 11 1 12 10 1 0 11 9 10 0 8-1 0.0 0.5 1.0 1.5 2.0 0.0 0.5 1.0 1.5 2.0 2.5 Run time ( h ) 32 C ) battery 30 Figure 20. - Battery data with the Mark III Suit. ( ° Temperature 28 20 26 14 re-start 19 Volts ambient 24 trip 18 12 22 17 20 10 0.0 0.5 1.0 1.5 2.0 16 8 Run time ( h ) 15 start trip Figure 19. - Day 1 logger data. 14 6 Amps 13 4 Day 3: Mark III Suit With JPL2-1 Battery 12 2 On day 3, a third successful trial was completed using 11 battery JPL5-2 on the Mark III suit. 10 0 Voltage and current history for the Mark III suit trials are 9: 30 9: 40 9: 50 10: 00 10: 10 10: 20 10: 30 superimposed in Figure 20. Time of day The day 3 EVA was limited to 1.6 hr. All three trials displayed a slight reduction in battery current after Figure 21. - Battery JPL2-1 voltage history on I-Suit. approximately 1.3 hr. This event did not correlate with the A check of the battery showed normal terminal voltage liquid air recharging process. Suit operators did not make any after resetting the circuit. The LAB was operated with a adjustments to the pump speed setting. The reason for current commercial battery while the liquid air charging procedure change remains unexplained. Noise in the current signal was completed. A washer was taped around the exposed continued to be considerable. battery fuse button to guard it from accidental contact, the safety circuit was reset and the battery was replaced on the Day 3: I-Suit With JPL2-1 Battery LAB. Within 1 min of operation on the stand, the battery shut Based on the success of the two previous days, it was off again. The I-Suit EVA was conducted with a commercial agreed that a parallel trial should be attempted with the I-Suit. batte...