Electric drive system with temperature preconditioning and temperature control method

DE102024116113B4Active Publication Date: 2026-05-21MAGNA POWERTRAIN AG & CO KG
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
MAGNA POWERTRAIN AG & CO KG
Filing Date
2024-06-10
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

The increased viscosity of fluids at low temperatures leads to higher fluid-mechanical losses in rotating components of electric vehicles, particularly in purely electric vehicles, which is not effectively addressed by existing heating methods.

Method used

The electric drive system employs winding heads surrounded by annular housings that act as tanks, filled with operating fluid by a pump, which selectively introduces heat to increase fluid temperature and reduce viscosity, using existing components like the power inverter and electric pump to generate waste heat efficiently.

Benefits of technology

This approach reduces fluid viscosity, enhancing efficiency by preconditioning the operating fluid, eliminating the need for additional heating components and ensuring operational efficiency across varying temperatures.

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Abstract

An electric drive system (30) with temperature preconditioning of the operating fluid, comprising an electric machine with rotor (2) and stator (1) and winding heads (21) axially terminal on the stator (1), as well as a gearbox (24) and a hydraulic arrangement for supplying the components of the drive system with the operating fluid with at least one electric pump (4), wherein the winding heads (21) are each surrounded in an annular manner by a housing (22) which is designed as a winding head tank (23) for receiving the operating fluid, characterized in that the pump (4) fills the winding head tanks (23) with a first pressure level and supplies the components of the electric drive system (30) with operating fluid with a second pressure level.
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