Updates of the Next Generation Lithium-ion Space Chemistry ...

EaglePicher Technologies, LLC This document does not contain ITAR controlled technical data.

Updates of the Next Generation Lithium-ion Space Chemistry, for improved Energy density and Improved Cycle Life

NASA Space Battery Workshop Huntsville, AL

November 18th, 2015 E. Alex Buonanno


Next Generation Lithium-ion Prismatic Cells


NCP12-4 Cell

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NCP12-4 Design • NCA/Synthetic Graphite

• 14.5 Ah BOL

• 12 Ah Nameplate

Physical Properties:

• 456 grams

• 4.45” Tall x 2.8” Wide x 1.0” Thick

NCP12-2 Flight Heritage:

X-37B Space Plane

EaglePicher Technologies, LLC This document does not contain ITAR controlled technical data. 4

NCP43-4 Cell


• 47 Ah BOL

• 43 Ah Nameplate


• 1283 grams


NCP43-2 Flight Heritage: ASTRO (Orbital Express),

X-37B Space Plane


NCP25-5 Cell

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• 35 Ah BOL

• 30 Ah Nameplate


• 950 grams


NCP25-1 Flight Heritage:

Phoenix, GRAIL, WISE, STPSat2,

NEXTSat, XSS-11


Life Test Data and Results


Life Cycle profiles

• NCP12-4 Cells ≈8% DoD at 30°C – 55 Minute charge @ 1.3 amps tapering to 4.1 volts

– 5 Minute discharge @ 13 amps

– 30 Minute Open circuit Rest

• NCP43-4 Cells 20% DoD at 30°C – 60 Minute charge @ 11 amps tapering to 4.1 volts


• NCP25-5 Cells 40% DoD at 20°C – 60 Minute charge @ 15 amps tapering to 4.0 volts


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NCP12-4 & NCP43-4 Life Cycle Summary of New Chemistry

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NCP12-4 Life cycles


End-of-Discharge Voltage

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Full Discharge Capacity @ 30°C

CAT & Post 4320 Performed on Different Cycler

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50% SoC 30°C DC Resistance

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Comparison NCP12-4 vs. NCP12-2


NCP12-2 vs. NCP12-4 Capacity @ 30°C

Post 4320

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NCP12-2 vs NCP12-4 Life Cycle Capacity Loss

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30°C Capacity NCP12-2 vs. NCP12-4

Life Cycle Checks

CAT vs. Post 4320 (CAT) Cycles

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50% SoC 30°C DC Resistance vs. NCP12-2

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NCP43-4 Life cycles


End-of-Discharge Voltage

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Full Discharge Capacity @ 30°C

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50% SoC 30°C DC Resistance

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Comparison NCP43-4 vs. NCP43-2


NCP43-2 vs. NCP43-4

Round 2 Initial Capacity

Post 4320

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Life Cycle Capacity Loss

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30°C Capacity NCP43-2 vs. NCP43-4

Life Cycle Checks

CAT vs. Post 4320 (CAT) Cycles

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50% SoC 30°C DC Resistance vs. NCP43-2

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NCP25-X Life Cycles


20% DoD Life Cycling Testing

Lot 1 Cells chemistry the same as NCP25-5 cells

• 4 Lot 1 NCP25-X Cells 20% DoD @ 30° & 10°C – 60 Minute charge @ 17 amps tapering to 4.1 volts


• After Cycle 1767 of 30°,10°C, 20°, 40° & 50°C cells had capacity and DC resistance checked.

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20% DoD 30°C, 10°C & 20°C Life Cycles

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Lot 1 NCP25-X, 20% DoD @ 30°, 10°, 20°, 40° & 50°C End of Discharge Voltage

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Lot 1 Capacity Check

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Lot 1 DC Resistance Check

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40% DoD 20°C Cycles

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40% Life Cycling Testing

• 4 Lot 1 NCP25-X Cells 40% DoD @ 20°C – 60 Minute charge @ 15 amps tapering to 4.0 volts


• Capacity and DC Resistance Measured ~1000 cycles

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Lot 1 NCP25-X, 40% DoD @ 20°C End of Discharge Voltage

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Lot 1 Capacity Check

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Lot 1 DC Resistance Check

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Comparison NCP25-5 vs NCP25-1


Life Cycle Capacity Loss

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0%

5%

10%

15%

20%

25%

30%

35%

40%

45%

0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000

% C

ap

ac

ity L

os

s

# LEO Cycles

NCO "Lander" Chemistry Compared to NCA Chemistry

(NCP43-2) 4.1V Avg (NCP43-2) 3.9V Avg

(NCP20Ah) 3.9V AVG (NCP25-1) 4.1V Avg.

(NCP25-1) 3.9V **MSP01 Batteries**

(NCP55-2) 4.0V 30% DoD (NCP55-2) 4.0V 40% DoD

(NCP25-5) 4.0V, 40% DoD Avg. (NCP25-5) 4.1V 20% DoD (30, 10, 20, 40 & 50°C)

(2) 20 Ah Cells, 20°C- NCO Material, 0.5C charge to 3.9 volts for 60 min. with 0.8C discharge for 30 min.

(5) 30Ah Cells, 20°C- NCA Material, 0.5C charge to 4.0 volts for 60 min. with 0.8C discharge for 30 min.

(4) 30 Ah Cells- NCA Material, 0.6C charge to 4.1 volts for 60 min. with 0.4C discharge for 30 min. Cap check after 30°, 10°, 20°, 40° & 50°C

NCO Material


Lot 1 Mission Power Profile

Avg. Cell Voltage @ hour 25 is 3.56 volts

Per PS_CMB.0001 the minimum cell voltage is 3.25 volts

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Status as of 9/28/15

• 20% NCP25-X cells completed various temperature cycling and capacity checks.

• 40% NCP25-X completed >10400 cycles @ 20°C, post capacity and DC Resistance after 1100 & 2400, 3400, 4400 … 10400 cycles.

• 40% NCP25-X cells ongoing 20°C Life Cycles

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Conclusions


• Next Generation of Lithium-ion Space Chemistry for these prismatic cell designs yields improvements

– Increased BOL capacity – Decreased capacity loss over life

– Reduction of 3-times in impedance growth, following

LEO cycling

– Physical dimensions allow for Off-the-shelf designs,

utilizing this chemistry, gaining improvements for the next generation of space vehicle.

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Acknowledgments

Chad Deroy

Dr. Rob Gitzendanner

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