Compact type aluminum heat exchanger with welding pipe for power electronic equipment and battery cooling

The invention discloses a compact type aluminum heat exchanger which is manufactured from a welding flat pipe with an inner fin and/or an outer fin and is used for cooling power electronic equipment and/or a battery unit. A fin insert is prefabricated and is manually or automatically inserted into the flat pipe for enhancing the turbulence of fluid, so that the heat diffusion is improved. Fins of the fin insert are provided with waves or are in wave shapes, and are manufactured by punching or corrugation forming. The flat pipe is formed by bending a sheet material, and one smaller side of the flat pipe is welded along the length direction of the pipe, so that the mechanical strength of the pipe is enhanced. The pipe is made of a core alloy, and the core alloy comprises 0.3-1.8 wt% of Mn, 0.25-1.2 wt% of Cu, not less than 0.02 wt% of Mg, not less than 0.01 wt% of Si, not less than 0.05 wt% of Fe, not more than 0.25 wt% of Cr and the balance of Al and at most 0.05 wt% inevitable impurities. The fin insert is ma