Thanks all and also thanks to Ferret for summing it up first time i.e 'similar to a buck converter'.
having done some research that makes much more sense, otherwise it seemed like controllers have transformers inside them. seems like the average phase current is higher than the average battery current but peak battery current should be similar to peak phase current.
having done some research that makes much more sense, otherwise it seemed like controllers have transformers inside them. seems like the average phase current is higher than the average battery current but peak battery current should be similar to peak phase current.