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

摘要

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 into the flat tubes for facilitating of flow turbulence and thus heat dissipation and have fins with undulating or wavelike shape manufactured by sampling or corrugating. Flat tubes are bent and welded along their length on their smaller side facilitating mechanical strength of the tubes. Tubes are manufactured from a core alloy containing 0.3 to 1.8 wt % Mn, 0.25-1.2 wt % Cu, ≧0.02 wt % Mg, ≧0.01 wt % Si, ≧0.05 wt % Fe, ≦0.2 wt % Cr, balance aluminum and unavoidable impurities up to 0.05 wt %. Fin inserts are manufactured from aluminum alloy comprising Mn 0-3 wt %, Fe 0-1.5 wt %, Cu 0-1.5 wt %, Mg 0-1.5 wt %, Si 0-1.0 wt %, Zn 0-4 wt %, Ni 0-1 wt % and Zr, Ti, Cr V 0-0.3 wt % each.

主权项

1. A heat exchanger (20) for thermal management of heat radiating components (5,6) comprising:
two manifolds (1,2) for directing fluid in and out of the heat exchanger (20); a plurality of flat tubes (3) having two ends (3a, 3b) to be mounted to the manifolds (1,2), two sides (14,14′) in a longitude direction and two component carrying surfaces (13. 13′) between two sides (14, 14′); tubes (3) are aligned substantially in parallel to each other between the manifolds (1, 2) so that their carrying surfaces (13, 13′) are substantially parallel facing each other, the tubes (3) being attached at each end (3A, 3B) to the adjacent manifold (1, 2) to allow coolant to flow through the tubes (3), characterized in that the flat tubes (3) are formed of a sheet material (11) by welding to form a weld joint (12).