1. AAE450 Spring 2009 X 0 Secondary Power System Battery (Lithium-Ion) Jeff Knowlton-Power System

2. AAE450 Spring 2009 Lithium-Ion Battery (Lith-ion) Lander  Two 28v 8 Ah batteries  448Watt-hours  1.54 kg Each 7.72kg for battery assembly (housing, heater,…)  Size dictated by Mars Rover (set as max for X 0 ) Rover  One 28v 8Ah Battery  224 Watt-hours  1.54 kg battery 3.86kg for battery assembly (battery, housing, heater,…)  One half mars rover specs  Cannot complete lunar mission without recharging Jeff Knowlton-Power System

3. AAE450 Spring 2009 Previous Mission Jeff Knowlton-Power System CandidateLi-ionLi-PolySuper NiCdNiMHSodium- Sulfur H2/O2 RFC Wh/Kg130 (145)* 150506512075 Wh/l200 (358)* 30011520025050 Cycle Life>10k>100>45k>10k>3k>2k Used in Space Since Since 2000 Not yet used Since 1990Experime ntal flights Not yet used Dev. Stage Active Used in 30+ spacecraft Used in 2 spacecraft InactivePurposed for ISS Patel, Mukund R., Spacecraft Power Systems, CRC Press, New York, 2005 p.252 *Current battery capabilities courtesy of Yardney

4. AAE450 Spring 2009 -Mars Rover gets at best 900W-h per 24h 37 min -Maximum of 40 m per day -Gives roughly.044m/W-h -Need 11250 W-h for 500m -Need 77 kg battery or solar panels to recharge the battery [Name] [Group]