The growth of market share of battery electric vehicles, as possible solution to the GHG environmental issues, has led to an increase in technological development in this technical area, that has to face powertrain thermal management as one of the biggest challenges to handle. To maintain in a narrow range of temperature the powertrain components, an efficient thermal management system is necessary. This is even more true for high performance applications. In this scenario, this thesis aims to develop a parametrized model of a high??performance BEV cooling system, by means of 1D modelling approach by Gamma Technologies software (GT-Suite), aiming to reach a good trade-off between a computationally fast and detailed model at the same time.