Use the Charge-Discharge Cycling node to specify a load cycling boundary condition in time-dependent simulations, where the switch between charge and discharge depends on the resulting cell voltage (or current). The node may for instance be used for constant-current/constant-voltage (CCCV) cycling in battery simulations.

Depending on the Start Mode setting, the node will either start in Charge or Discharge mode.

Each cycle always start with a constant Discharging/Charging current period, which ends when the corresponding Minimum/Maximum voltage is reached (the voltage is defined with respect to ground).

After the constant Discharging/Charging current period, you may also Include constant voltage discharging/charging periods, which will end when the specified Lower cutoff current or Upper cutoff current is reached. At the end of each cycle, you can also Include rest periods, specifying the Resting time.

The node also defines a cycle counter variable (xxx.cdc1.cycle_counter, where xxx is the physics interface tag), which may be used in postprocessing or when defining Stop Condition in the time-dependent solver to end the simulation when a specified number of cycles has been reached.

Note: For more complex load cycles you may use The Events Interface to set up the cycling behavior.