High Specific Energy 90Ah Li-ion Battery for the New Lunar Exploration Vehicle
- Paper number
IAC-13,C3,3,6,x18709
- Author
Mr. Wang Chen, Shanghai Academy of Spaceflight Technology, China
- Year
2013
- Abstract
Because of high specific energy and wide operation temperature,Li-ion batteries have been applied on many planet exploration vehicles,such as Opportunity,Mars Express,HAYABUSA and YH-1 Mars Probe.The New Lunar Exploration Vehicle requests higherhigher specific energy.The 90Ah battery pack is constituted from fourteen 45Ah Li-ion cells with 2 cells in parallel and 7 two-paralleled-cells in series.With LiCoO\small 2 cathode and carbon anode,the specificenergy of 45Ah Li-ion cell is 195Wh/kg.It can be charged or discharged at the temperature from -20 centigrade to +55 centigrade.The discharge capacity at -20 centigradesi 71.5\% of that at +20 centigrade and 97.5\% at +55 centigrade.The cell won't burn or explode even overcharged to 4.5V,over-discharged to 0V and short-circuited with 10m$\Omega$ resistance.The specific energy of 90 Ah battery is as much as 175Wh/kg.The 90Ah battery has passed the qualified tests,including sine vibration,random vibration,shock test and thermal vacuum.The capacity reduces 5.2\% after finishing 1230 circles on-orbit-simulation without balance circle;and the voltage difference between the cells is less than 20mV.
- Abstract document
- Manuscript document
(absent)