COMPACT ALUMINIUM HEAT EXCHANGER WITH WELDED TUBES FOR POWER ELECTRONICS AND BATTERY COOLING

A compact aluminum heat exchanger manufactured from welded flat tubes with internal and/or external fins for cooling of power electronic devices and/or battery cells. The fin insert is prefabricated and inserted manually or automatically into the flat tubes for facilitating of flow turbulence and thus heat dissipation. The fins of the fin insert have undulating or wavelike shape and manufactured by sampling or corrugating. The flat tubes are bended from a sheet material and welded along their length on their smaller side facilitating the mechanical strength of the tubes. The tubes are manufactured from a core alloy containing 0.3 to 1.8 wt% Mn, 0.25-1.2 wt% Cu, >=0.02-wt, >=0,02 wt% Mg, >= 0.01 wt% Si, >=0.05 wt% Fe, = 0,02 % en poids, >=0,02 % en poids Mg, >= 0,01 % en poids de Si, >= 0,05 % en poids de Fe,