Mercedes-Benz has started producing high-performance batteries for its all-electric luxury EQS at its Stuttgart-Hedelfingen plant, part of the Untertuerkheim location in Germany, ahead of the sedan's world premiere on 15 April.

The EQS is first of a new generation of high performance electric vehicles and will offer a range of more than 700km (WLTP), based on a high efficiency powertrain and advances in battery energy density.

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Having integrated battery production seamlessly alongside existing transmission production, the Hedelfingen plant has been transformed into an important part of the company's global battery production network.

Hedelfingen has a production and logistics area of about 16,500 sq m. The lithium-ion battery system is produced on a 300m production line with 70 stations and with a high number of automated as well as manual steps. A variety of components including up to 12 cell modules and the EE-compartment for the intelligent integration of power electronics make up the EQS battery system. The EE-compartment is assembled in Berlin. 

The EQS will be equipped with battery layouts enabling different range and performance variants.

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In-house-developed software enables updates over the air (OTA) ensuring energy management will remain up-to-date over the entire lifetime of the vehicle. EQS battery cell chemistry includes nickel, cobalt and manganese in a ratio of 8: 1: 1, cutting the cobalt content to around 10%. 

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A new factory for small-series production of future lithium-ion battery cells is being planned, starting operations in 2023.