High pressure gas tank heat management by circulation of the refueling gas

A heat management system for a high pressure gas tank comprising a loop circulation path for the gas including a path through an internal heat exchanger in the tank and a path through a heat exchanger external to the tank, wherein, in the instance of refueling, the refueling gas circulates multiple times in the loop through the internal heat exchanger and the external heat exchanger and in the course of circulation, a portion of the gas from the refuel line is introduced into the tank. In a reverse circulation during driving, the tank is warmed by heat exchange from the external heat exchanger to the internal heat exchanger.