A cooling system for an integrated drivetrain assembly and an electrified vehicle

A cooling system for an integrated drivetrain assembly of an electrified vehicle, the integrated drivetrain assembly comprising an electric motor, a reducer mechanically coupled to the electric motor, and a power inverter at least electrically connected to the electric motor, the cooling system comprising

• one cooling circuit configured for being flowed through with a coolant and for distributing the coolant at least throughout the integrated drivetrain assembly, the cooling circuit comprising a fluid turbulent passage at least formed by a plurality of cooling spikes and arranged onto an inner surface of a heatsink which is configured for cooling at least one power switching device provided with the power inverter,
• wherein the heatsink comprises at least one cooling plate with one corresponding cover, the plurality of cooling spikes are provided on the at least one cooling plate and the corresponding cover, the plurality of cooling spikes comprising the cooling spikes with an increased or decreased size, the location of the cooling spikes with an increased or decreased size depends on the location of the electrical components provided by the at least one power of switch device so as to modulate the rate and flow of the coolant within the fluid turbulent passage.