US 12,249,898 B2
Coolant supply system for an electrically operated vehicle axle
Andreas Weber, Ingolstadt (DE); Ivo Greiter, Eitensheim (DE); Harald Gloede, Pförring (DE); Herbert Tschentscher, Riedenburg (DE); and Frank Roethlingshoefer, Ingolstadt (DE)
Assigned to AUDI AG, Ingolstadt (DE)
Appl. No. 18/699,966
Filed by AUDI AG, Ingolstadt (DE)
PCT Filed Jul. 27, 2022, PCT No. PCT/EP2022/071064
§ 371(c)(1), (2) Date Apr. 10, 2024,
PCT Pub. No. WO2023/072445, PCT Pub. Date May 4, 2023.
Claims priority of application No. 10 2021 128 067.2 (DE), filed on Oct. 28, 2021.
Prior Publication US 2024/0333102 A1, Oct. 3, 2024
Int. Cl. H02K 9/19 (2006.01); B60K 11/02 (2006.01); H02K 7/116 (2006.01); H02K 9/193 (2006.01)
CPC H02K 9/19 (2013.01) [B60K 11/02 (2013.01); H02K 7/116 (2013.01); H02K 9/193 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A coolant supply system for a drive device of an electrically operated vehicle axle of a vehicle with an electric machine which has a cylindrical stator housing, in which there is a winding head space axially on both sides of a rotor/stator arrangement, at the bottom of which coolant collects, wherein the two winding head spaces are fluidly connected to one another via a coolant sump, and
wherein the stator housing height and the coolant sump height in the electric machine vertical direction add up to a total height, wherein the stator housing height is measured from a suction point defined on a lower internal surface of the stator housing, and
wherein, in order to reduce the total height, the coolant sump is offset by a transverse offset from a rotor axis vertical plane, so that the stator housing height and the coolant sump height at least partially overlap in the electric machine vertical direction by an overlap amount, and
wherein the electric machine is mounted transversely on the vehicle such that the electric machine extends parallel to the vehicle axle,
wherein the coolant sump is divided into two slosh channels, which are arranged with a transverse offset on both sides of the rotor axis vertical plane, and
when the vehicle is driving uphill, the rear slosh channel in the direction of travel ensures a fluid connection between winding head spaces due to transverse force, or when the vehicle is driving downhill, the front slosh channel in the direction of travel ensures the fluid connection between the winding head spaces due to transverse force.