On the ID3 top speed is limited to 160 km/h.
I have designed cooling systems to electric bus Linkker. The radiators have to be bigger due to lower delta T in temperature. Battery max temps can go up to 60 celsius and system needs to be able to keep under about 55c depending what kind of battery chemistry you are using it can be little higher or lower.
Then you know how much heat is generated during top speed driving or in fast charging. Usually the fast charging is the bottle neck as fans can only move certain amount of air.
To get any cooling you need to have large radiator surface area if because outside temp can be even over +40 celsius. So delta T is only low as 15 celcius.
If you know again how you will use your car you can close the front cooling holes little bit like I did in my ID3.
