A method for determining target temperature limit values for one or more traction units of an electric powertrain of a vehicle

The method optimizes thermal management in electric powertrains by determining target temperature limits for traction units based on vehicle state and mission requirements, balancing cooling power, thermal capacity, and efficiency to prevent derating.

WO2026115411A1PCT designated stage Publication Date: 2026-06-04MASERATI
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
MASERATI
Filing Date
2025-11-21
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing thermal management systems for electric powertrains in vehicles fail to achieve a balance between cooling electric power consumption, thermal capacity utilization, and transmission efficiency, leading to inefficiencies and potential performance derating due to overtemperature.

Method used

A method for determining target temperature limit values for traction units, including inverters, electric traction motors, and transmission lubricants, based on the vehicle's state of charge, drive mode, and mission requirements, to optimize thermal management and prevent derating.

Benefits of technology

This method enables efficient thermal management by optimizing cooling power consumption and maintaining component efficiency, thereby enhancing vehicle performance and range while preventing derating.

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Abstract

Disclosed herein is a method for determining target temperature limit values for one or more traction units of an electric powertrain of a vehicle, wherein each traction unit comprises an electric traction motor (M1, M2, M3, M4 ), an inverter operatively connected to the electric traction motor (M1, M2, M3, M4 ), and a transmission connecting the electric traction motor (M1, M2, M3, M4 ) to one or more drive wheels (RL, RR, FL, FR) and including a transmission lubricant, the electric powertrain also including a battery operating in an electric power transfer relationship with each electric traction motor (M1, M2, M3, M4 ). Thanks to the method according to the invention it is therefore possible to determine target temperature limit values for one or more traction units of an electric powertrain of a vehicle, which values are corrected as a function of the vehicle mission, of the specific characteristics of the component of the traction unit, and of the actual operating condition of the vehicle.
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