This YouTube video from Bjorn Nyland (Tesla fanboy who referred so many he got a free Model X)
He shows that when connected to a 100kW CCS combo charger, the IONIQ electric accepts up to 70 kW of power.
Hyundai Ioniq supports up to 70 kW via the CCS plug. I tested this on a 100 kW Delta charger at Vestby, Norway last night. Peak power was 69.3 which was pretty close. The Ioniq has a 28 kWh battery pack. That number is for available energy. I believe the car has the same battery as Kia Soul EV which is a 30.5 kWh.
I can't find the data, but I thought the Bolt was clos to 50 kW on DC Fast Charger