Daimler raises the curtain on the Mercedes EQS

April 07, 2021 // By Christoph Hammerschmidt
Daimler raises the curtain on the Mercedes EQS
Not yet has it been officially unveiled, the Mercedes EQS. But with the well-measured release of technical details, Daimler is keeping up the excitement for the electric version of the Mercedes flagship S-Class.

Many electric cars have been hyped in advance as "Tesla killers", but the role model has never really been achieved. Now, however, the electric car pioneer's supremacy could be in jeopardy, because the Daimler engineers have put in a lot of effort. The first thing that catches the eye is the range of 770 km (470 miles). To achieve this, Daimler has introduced a new 400-volt battery generation with a higher energy density. They offer a usable net energy content of 107.8 kWh, which is about 26 percent more than Daimler's previous top electric model EQC. The innovative battery management software developed in-house enables updates over the air (OTA). In this way, the energy management of the EQS remains up-to-date over the lifecycle; the range is likely to increase over the vehicle's lifetime as a result of these updates through improved BMS algorithms.

In terms of cell chemistry, a major step has been achieved in terms of sustainability: the cobalt content has been reduced to ten percent, and the optimised active material consists of nickel, cobalt and manganese in a ratio of 8:1:1.

The range is optimised by a sophisticated management of the high-voltage and low-voltage consumers and numerous recuperation options, which are automatically readjusted by the vehicle assistant. The recuperation power reaches 290 kW; all assistance systems in the car, including map navigation, collaborate to optimise the range. And once the battery is empty, sufficient energy for a further 300 kilometres can be recharged at a suitable charging station within 15 minutes. The EQS can absorb up to 200 kW during charging. According to experts, this is more than any other BEV with a 400V electrical system - with the exception of Tesla, however, which can do a little more.

To get the power of the batteries on the road, Daimer has developed a modular and scalable drive concept that can also be transferred to other models. Depending on


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