Cell total capacity is the maximum amount of charge that could be extracted from the cell until it reaches the minimum specified voltage: at a very slow discharge rate to minimise the effect of ohmic voltage drop due to Cell internal resistance, also Dithering input voltage to get rid of hysteresis to achieve true 0% or 100% SoC, maybe Precise cell capacity measurement. Cell total capacity is (almost) independent of the temperature at which the battery is discharged.
Typical cylindrical cell capacity is 1–5 Ah.
Cell discharge capacity, often appearing in battery specifications, is the amount of charge that could be extracted at a certain temperature and rate until the cell voltage reaches the specified minimum. It strongly depends on the discharge temperature, because Cell internal resistance increases at low temperatures:
Estimating total capacity is difficult when the charge of the cell always stays around the same value (e. g., in hybrid electric vehicles), rather than is charged or discharged over long time when we can project the removed charge on the substantial value in Cell open-circuit voltage function change.
Cell capacity is one of the Cell parameters.
See also:
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