US 12,256,524 B2
Heat sink for a power inverter of an electric motor of a vehicle, power inverter and vehicle
Etienne Doyard, Toulouse (FR)
Assigned to Hella GmbH & Co. KGaA, Lippstadt (DE)
Filed by Hella GmbH & Co. KGaA, Lippstadt (DE)
Filed on Oct. 10, 2022, as Appl. No. 18/045,319.
Application 18/045,319 is a continuation of application No. PCT/EP2020/059998, filed on Apr. 8, 2020.
Prior Publication US 2023/0059477 A1, Feb. 23, 2023
Int. Cl. H05K 7/20 (2006.01)
CPC H05K 7/209 (2013.01) 15 Claims
OG exemplary drawing
 
1. A heat sink for a power inverter of an electric motor of a vehicle, the heat sink comprising:
a coolant inlet;
a coolant outlet;
a first cooling segment;
a second cooling segment;
a coolant channel system having:
a first coolant channel directly connecting the coolant inlet with a second coolant channel in the first cooling segment,
a third coolant channel directly connecting the second coolant channel with a fourth coolant channel in the second cooling segment, and
a fifth coolant channel directly connecting the fourth coolant channel with the coolant outlet;
the first cooling segment being attached with at least one first power module of at least two power modules for cooling the at least one first power module via the second coolant channel;
the second cooling segment being attached with a second power module of the at least two power modules for cooling the at least one second power module via the fourth coolant channel;
a sixth coolant channel which is a bypass coolant channel directly connecting the first coolant channel with at least one of the third coolant channel and the fourth coolant channel for cooling the at least one second power module via cold coolant from the coolant inlet not having been heated by the at least one first power module via the second coolant channel.