The High Voltage Battery System of the New Mercedes-Benz EQC

Authors

Dr.-Ing. S. Dehn, Dipl.-Ing. G. Paul, Dipl.-Ing. (BA) F. Cornelius, Mercedes-Benz AG, Kirchheim unter Teck / Nabern

Year

2020

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 813

Summary

It was at the 2016 Paris Motor Show that Mercedes-Benz first presented its new product and technology brand for electric mobility. In mid-2019 the time has now come: The EQC (combined power consumption: 20.8 - 19.7 kWh/100 km; combined CO₂ emissions: 0 g/km)1 is the first Mercedes-Benz vehicle to be launched under the EQ brand. With respect to quality, safety and comfort the EQC is the Mercedes-Benz among electric vehicles, and highly convincing in the sum of its attributes.
As the first Mercedes-Benz model to be launched under the new product and technology brand EQ, the EQC features an all-new drive system development with compact electric drivetrains at each axle. These give the EQC the driving characteristics of an all-wheel drive.
However, centrepiece of the drive system is the lithium-ion battery from in-house production, which is housed in the floor of the vehicle. Providing 80 kWh of useable energy, the battery supplies the vehicle incorporating a sophisticated operating strategy and thus enables an electric range of 445 km – 471 km (NEDC)1.
After a short introduction on the overall powertrain level, this paper describes and explains the build-up of the high voltage battery system as well as of its main components. Furthermore, measures in order to fulfil safety requirements are presented and the basic criteria for the design of battery systems at Mercedes-Benz are explained. Concluding, an overview about battery validation on different testing levels and an insight into the global production network and battery production network of Mercedes-Benz AG is given.