Conditionals and triggered subsystems in Simulink

I am running a simulation where my model parameters are defined in an m-file and the differential equations are in Simulink. Specifically, I have a battery model and would like to charge the battery at a constant current (input) until a high threshold voltage (output) is reached, then reverse the direction of current until a low threshold voltage is reached. I would then like to repeat this for a specified number of cycles. Due to non-linearities in the model, I can't feasibly predict the charge/discharge times and they also change as I cycle longer.

How would I implement this in the most flexible way and allow for multiple conditions? For example, after the threshold voltage is reached, I may want to hold the battery at zero current before discharging and vice versa for the opposite direction. Using a Simulink switch block doesn't seem practical because the conditions could get complicated. Would a triggered or enabled subsystem suit my purpose or would something else work better?