Depth of discharge
Depth of Discharge (DoD) is an alternate method to indicate a battery's state of charge (SoC). The DoD is the complement of SoC: as one increases, the other decreases. While the SoC units are percent points (0% = empty; 100% = full), DoD can use Ah units (e.g.: 0 = full, 50 Ah = empty) or percent points (100% = empty; 0% = full). As a battery may actually have higher capacity than its nominal rating, it is possible for the DoD value to exceed the full value (e.g.: 55 Ah or 110%), something that is not possible when using state of charge.
At least in some battery technologies such as lead-acid AGM batteries there is a correlation between the Depth of discharge and the Cycle life of the battery.[1]
See also
- Battery balancer
- Battery monitoring
- Battery charger
- Deep cycle battery
- State of health
- Battery management system
References
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