Efficient Transmission Kit for Battery Electric Vehicles – Trends and Solutions

Authors

Dr.-Ing. I. Steinberg, Dr.-Ing. G. Hellenbroich, Dr.-Ing. J. Nowack, FEV Europe GmbH, Aachen

Year

2018

Print Info

Fortschritt-Berichte VDI, Series 12, No 807

Summary

This article presents a transmission family for vehicles powered exclusively by an electric motor (BEV - Battery Electric Vehicle). The transmission family is also suitable for the electric motor part of P4 hybrid vehicles (HEV - Hybrid Electric Vehicle), in which the rear wheels are usually driven by electric motor and the front wheels by internal combustion engine.
The article identifies development trends. Based on the authors' experience, the complexity of transmissions for electric drivetrains is currently increasing. Apart from the dominant single-speed variant, the article also describes a 2-speed variant that offers both power-shift capability and coasting in addition to recuperation. The goal of the article is to propose a transmission construction kit with low component complexity up to a maximum electric motor torque of 600 Nm. The drivetrain is installed transversely to the direction of travel. The construction kit meets the requirements of different vehicle classes, such as middle-class limousines, SUVs (Sports Utility Vehicles), vans in the 3.5-ton class and narrow-track applications, such as road sweepers for inner-city areas.