Battery knowledge · State estimation
Depth of discharge
How much of a cell’s capacity is used in a cycle. Deep cycles cause more mechanical stress in the active materials than shallow ones.
- Abbreviation
- DOD
- Unit
- %
Example
Charge balance and state of charge
From 20% SOC, ideal full charge takes 48 min. Integration stops at 100%.
Current is positive into the cell. Constant capacity and 100% charge efficiency; no CC-CV taper.
Explore the graph
SOC rises with accumulated charge; depth of discharge falls by the same amount.
From 20% SOC, ideal full charge takes 48 min. Integration stops at 100%.
SOC = SOC₀ + ∫ I_charge dt / Q; DOD = 1 − SOC
Illustrative model. Current is positive into the cell. Constant capacity and 100% charge efficiency; no CC-CV taper.
Use in Lemonergy
Distinguish internal states from noisy measurement estimates.
This is a reference concept. No executable Lemonergy block has been verified for this term.
References & further reading
Further reading on this topic
These sources provide broader context; they are not presented as citations for every statement in this entry.
- Extended Kalman filtering for battery management systems of LiPB-based HEV battery packs: Part 3. State and parameter estimation
Gregory L. Plett · Journal of Power Sources · 2004
Topic background · Model-based battery state-of-charge and parameter estimation with extended Kalman filtering, including uncertainty and model dependence.
- Extended Kalman filtering for battery management systems of LiPB-based HEV battery packs: Part 2. Modeling and identification
Gregory L. Plett · Journal of Power Sources · 2004
Topic background · Battery charge balance, open-circuit voltage, ohmic loss, polarization dynamics and model identification; parameters require cell-specific data.