SEARCH · Search NASA
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Battery cell wear out mechanisms and signatures are examined and compared to orbital data from the six on-orbit Hubble Space Telescope (HST) batteries, and the Flight Spare Battery (FSB) Test Bed at Marshall Space Flight Center (MSFC), which is instrumented with individual cell voltage monitoring. Capacity trend data is presented which suggests HST battery replacement is required in 2005-2007 or sooner.
Portable battery charger operates at about 20 kHz to take advantage of relatively low weight and low acoustical noise of ferroresonant circuits operating in this frequency range. Charger split into stationary unit connected to powerline and mobile unit connected to battery or other load. Power transferred to mobile unit by magnetic coupling between mating transformer halves. Advantage where sparking at electrical connection might pose explosion hazard or where operator disabled and cannot manipulate plug into wall outlet. Likely applications for charger include wheelchairs and robots.
Conference on reduction and suppression of aircraft engine noise
Automatically charging battery of electric storage cells
Development of membrane separators for sterilizable silver-zinc battery
Automatic device for recharging of nickel-cadmium battery
Coating procedure for tape separator of heat sterilizable battery
Performance testing of alkaline battery separator films
Heat sterilizable remotely activated silver zinc battery for energy source of planetary lander capsule
Design considerations and performance features of yo-yo despinning mechanisms
Cycling tests of alkaline battery separator membranes
Regression analysis of cycle life data for long life 20 ampere hour sealed nickel cadmium battery
Conference on dynamics and aeroelasticity of structural materials for space shuttle design considerations
Conference of structural design principles and mechanical engineering methods for aerospace mechanisms used in orbital and space flights
Nonmagnetic hermetically sealed battery case made of epoxy resin and woven glass tape for use with electrochemical cells in spacecraft
Absorber evaluation of alkaline battery separator systems with electrolyte wetting and wicking measurement