HEAT SINK FOR COOLING AN ELECTRICAL AND/OR ELECTRONIC ASSEMBLY

For a heat sink (1) for cooling an electrical and/or electronic assembly (4), in particular for electric vehicles or hybrid vehicles, wherein the heat sink (1) comprises at least one base plate (2) and at least one top plate (3), wherein the base plate (2) is formed as a deep-drawn metal sheet with an indentation (20), wherein the top plate (3) covers the indentation (20) in the base plate (2) so that a cooling duct (5) is formed in the indentation (20) of the base plate (2) between the base plate (2) and the cover plate (3), wherein the cooling duct (5) runs from an inlet opening (8) to an outlet opening (9) of the heat sink (1), wherein the inlet opening (8) and the outlet opening (9) is formed in the base plate (2), it is proposed that an intermediate plate (10) having a first side (11) and a second side (12) facing away from the first side (11) is arranged between the top plate (3) and the base plate (2), wherein the first side (11) of the intermediate plate (10) faces the top plate (3) and the intermediate plate (10) is distanced from the top plate (3) by a gap (7), wherein the inlet opening (8) is formed in a first base region (22) of the base plate (2) and the outlet opening (9) is formed in a second base region (23) of the base plate (2), wherein the first base region (22) is spaced apart from the second side (12) of the intermediate plate (10) by an inlet space (82) and the second base region (23) is spaced apart from the second side (12) of the intermediate plate (10) by an outlet space (92).