Battery Technology - May 2021 - 11

40%

y = -4E-06x2 + 0.0021x + 0.0158
R2 = 0.9689

2s Pulse
35%
3s Pulse

Capacity Loss

30%
25%

20%
15%

10%

y = -3E-06x2 + 0.0016x - 0.0159
R2 = 0.9545

5%
0%
0

50

100

150

200

250

300

Cycles

Figure 5. LFP 2.3 Ah cell capacity loss with 120-A pulsing for 2 seconds and 3 seconds. The
degradation is significantly lower than the 1,000-cycle design target. (US Army CCDC Ground
Vehicle Systems Center)

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This is a condensed version of SAE
Technical Paper 2020-01-0452, " Accelerated
Degradation of Li-Ion Batteries for High Rate
Discharge Applications, " authored by Tony
Thampan, Yi Ding, and Laurence Toomey of
the Army Combat Capabilities Development
Command (CCDC) Ground Vehicle Systems
Center.
The paper can be ordered or downloaded
from SAE International at www.sae.org. 

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Battery Technology - May 2021

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