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24
Factor
Impacts
How it impacts life
%SOC
Calendar life
The higher the %SOC the lower the expected life and vice versa.
Note that the expected life at 100 % SOC and 20 ºC is more than 20 years.
Module temperature
Calendar life
The higher the temperature the lower the expected life and vice versa.
Level of re-charge current
Cycling life
The higher the re-charge current the lower the expected life and vice versa.
%DOD
Cycling life
The higher the %DOD the lower the expected life and vice versa.
Factors included
Impacts
Level of re-charge current
Cycling life
%DOD
Cycling life
Factors included
Impacts
%SOC
Calendar life
Module temperature
Calendar life
Since these factors vary greatly between applications, the Evolion’s life expectancy is expressed in calendar life and in cycling life,
separately. In that case, the cycling life is given and is independent of the temperature and %SOC. In the same way, the calendar life is
given and is independent of level of re-charge current and %DOD in cycling. See Figures 12 and 13.
Figure 12. The calendar life of the Evolion
The factors that impact the cyclic aging are:
•
Level of re-charge current (% of IMR)
•
Depth of discharge
The following table summarizes these factors and how they impact the life of the Evolion.
Figure 13. The cycling life of the Evolion
Temperature (ºC)
Calendar life (years)
0
20 25 30 35 40
20
18
16
14
12
10
8
6
4
2
0
Evolion (100 % SOC)
Re-charge = 0.75 x IMR
End of life = -20 % capacity
Depth of discharge (%)
Number of cycles
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
10000000
1000000
100000
10000
1000