US 12,337,670 B2
Electric vehicle drive module cooling
Attila Nagy, Fishers, IN (US); and Andrew Dragon, Fishers, IN (US)
Assigned to BorgWarner Inc., Auburn Hills, MI (US)
Filed by BorgWarner Inc., Auburn Hills, MI (US)
Filed on Sep. 12, 2022, as Appl. No. 17/942,628.
Prior Publication US 2024/0083231 A1, Mar. 14, 2024
Int. Cl. B60K 1/00 (2006.01); B60K 11/02 (2006.01); H02K 9/19 (2006.01)
CPC B60K 1/00 (2013.01) [B60K 11/02 (2013.01); H02K 9/19 (2013.01); B60K 2001/006 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electric vehicle drive module, comprising:
a housing;
an electric motor residing within the housing, the electric motor having a stator and a rotor, the rotor having a shaft;
a gear assembly rotationally driven by the shaft;
a coolant sump established in the housing;
a coolant passage residing in a wall of the housing, the coolant passage in fluid communication with the shaft and with the coolant sump, wherein coolant is drawn from the coolant sump and through the coolant passage upon rotation of the shaft; and
a check valve situated in the coolant passage, the check valve permitting coolant flow from the coolant sump and downstream thereof via the coolant passage, and preventing coolant flow to the coolant sump via the coolant passage.