US 12,273,007 B2
Cooling of an electric drive in an electrically driven vehicle
Anton Schuelin, Leipzig (DE); Julius Georgemannan, Trichy Tamil Nadu (IN); Marie-Luies Schoeneck, Grossbottwar (DE); Martin Kuehnemund, Stuttgart (DE); and Peter Zweigle, Ditzingen (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 17/796,244
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Dec. 23, 2020, PCT No. PCT/EP2020/087741
§ 371(c)(1), (2) Date Jul. 28, 2022,
PCT Pub. No. WO2021/151599, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 10 2020 201 127.3 (DE), filed on Jan. 30, 2020.
Prior Publication US 2023/0106304 A1, Apr. 6, 2023
Int. Cl. H02K 5/20 (2006.01); H02K 9/19 (2006.01)
CPC H02K 5/203 (2021.01) [H02K 9/19 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An electric drive (10) of an electrically driven vehicle, the electric drive comprising a rotor (22) and a stator (24) that surrounds the rotor (22), the stator (24) is enclosed by a housing (25), wherein the housing (25) is formed by an outer part (48) and an inner part (50), the inner part (50) is inserted into the outer part (48),
wherein the stator (24) is coupled to an inner peripheral surface of the inner part (50),
wherein the outer part (48) includes axial ribbing (64) having individual axial ribs that are spaced apart from one another in a circumferential direction and extend in an axial direction (78) of the housing (25) and are arranged on an inner circumferential surface of the outer part (48),
wherein the inner part (50) includes axial ribbing (62) having individual axial ribs that are spaced apart from one another in the circumferential direction and extend in the axial direction (78) of the housing (25) and are arranged on an outer circumferential surface of the inner part (50),
wherein an intermediate space (60) is formed where individual ribs of the axial ribbing (64) of the outer part (48) are arranged in the circumferential direction between individual ribs of the axial ribbing (62) of the inner part (50), the intermediate space (60) is configured to accommodate a cooling medium flow and is annular in shape,
wherein the intermediate space (60) is in fluid communication with an inflow (42) of the outer part (48) and an outflow (44) of the outer part (48), the inflow (42) and the outflow (44) being offset by 180 degrees in the circumferential direction relative to one another.