68
AMP20
M1
HD-A Open Circuit Voltage vs. State of Charge
AMP20
M1
HD-A Temperature Effects on OCV vs. SOC
3.10
3.15
3.20
3.25
3.30
3.35
3.40
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
vo
lta
ge
(V)
DOD
Average DOD-OCV hysteresis
Average voltage (V)
-0.0004
-0.0003
-0.0002
-0.0001
0
0.0001
0.0002
0
0.2
0.4
0.6
0.8
1
d(
O
CV
)/
dT
(V
/'
C)
SOC
d(OCV)/dT fit for 20 Ah cells
20 Ah data
fit
20 Ah cell ID SGHGMB001
d(OCV)/dT fit