What is the Life Expectancy of the Aluminum
Factor 1: Depth of
Discharge…Percentage of Capacity Used Per Cycle.
DOD, short for the Depth of
Discharge, is used to describe how deeply the battery is discharged. If we say
a battery is 100% fully charged, it means the DOD of this battery is 0%, If we
say the battery have delivered 30% of its energy, here are 70% energy reserved,
we say the DOD of this battery is 30%.
Factor 2: Discharge Rate, The
AMPS Divided by the Capacity
To Read the Chart Above, Here
are Some Examples
All Numbers are at a 1C
Discharge Rate, Which is Aggressive…
At a 90% Depth of Discharge,
Our Batteries Will Provide 2400 Cycle to 80% State-of-Original-Capacity (SOIC)
At a 10% Depth of Discharge (Say,
Engine Starting) Our Batteries Will Provide 35,000 Cycles Until 80% SOIC.
Beyond 35,000 Cycles the Battery is Still Functioning But Gradually Losing
Capacity, but not Performance
Conclusion: By recharging a
lithium ion battery more frequently, thus reducing the DOD (depth of
discharge), the battery cycle life is Increased. Solar is very often a beneficial
method to reduce DOD and increase life!