The Nominal Capacity, Energy and Voltage in battery engineering are important terms to define.
Nominal Capacity
The nominal capacity of a cell is the capacity (Ah) measured at a standard temperature and charge / discharge rate. The discharge capacity test is preceded by a standard charge cycle and ends at a given terminal voltage. The charge capacity is preceded by a standard discharge cycle and ends in Constant Voltage (CV) mode when the current drops to that defined by the standard charge cycle.
Nominal Energy
The nominal energy of a cell is the measured charge / discharge electrical energy at a given c-rate and temperature. The cycles are specified as the standard charge discharge cycles and hence end at a given terminal voltage during discharge and at a end charge current during the constant voltage charge cycle.
Nominal Voltage
The nominal voltage of a cell is specified at a given charge / discharge rate and temperature. It is calculated from the measured Nominal Capacity and Nominal Energy. Nominal Voltage equals Nominal Energy divided by Nominal Capacity.