An update…
E-One Moli, NPE, and I have been discussing the criteria used to set these pulsed charge and discharge power limits.
They are the max discharge/charge power levels and pulse lengths you can run at, based on state-of-charge, before the cell reaches its recommended limit of 4.2V (during charge) or 2.5V (during discharge).
According to E-One Moli, if the cell is kept within these voltage limits there is no expected impact on cycle life, capacity, or internal resistance when running at these power levels for their matching pulse length limits.
This makes the data even better than I thought for calculating max regen current levels for a pack.