AAE450 Spring 2009

X0 Secondary Power System

Battery

(Lithium-Ion)

Jeff Knowlton-Power System

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 X0)

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

AAE450 Spring 2009

Previous Mission

Jeff Knowlton-Power System

Candidate Li-ion Li-Poly Super NiCd NiMH Sodium-Sulfur

H2/O2 RFC

Wh/Kg 130 (145)*

150 50 65 120 75

Wh/l 200 (358)*

300 115 200 250 50

Cycle Life >10k >100 >45k >10k >3k >2k

Used in Space Since

Since 2000

Not yet used

Since 1990 Experimental flights

Not yet used

Dev. Stage

Active Active Used in 30+ spacecraft

Used in 2 spacecraft

Inactive Purposed for ISS

Patel, Mukund R., Spacecraft Power Systems, CRC Press, New York, 2005 p.252

*Current battery capabilities courtesy of Yardney

AAE450 Spring 2009 [Name] [Group]

-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