Open Circuit Voltage (OCV) refers to the voltage across the terminals of a battery when no external load is connected and no current is flowing. It reflects the electrochemical potential difference between the positive and negative poles of the battery and is one of the most intrinsic and stable voltage characteristics of the battery.
Characteristics
OCV is an indication of the potential difference between the internal materials of the battery
It usually varies monotonically with SOC (State of Charge, State of Charge)
The OCV measured after the battery is fully rested is closer to the true value (avoiding polarization effects)
