1.State of Charge (SOC)(%)– An expression of the present battery capacity as apercentage of maximum capacity. SOC is generally calculated using current integration to determine the change in battery capacity over time.
2. The SOC is defined as the available capacity expressed as a percentage of some reference, sometimes its rated capacity but more likely its current (i.e. at the latest charge-discharge cycle) capacity but this ambiguity can lead to confusion and errors. It is not usually an absolute measure in Coulombs, kWh or Ah of the energy left in the battery which would be less confusing.
SOC in %
depth of discharge (DoD), Battery pack, Battery status
Coulomb-counting, Battery performance
http://web.mit.edu/evt/summary_battery_specifications.pdf. (1.); http://www.mpoweruk.com/soc.htm. (2.)
Author: Anas Naddour