Thursday, April 22, 2021
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    The Mercedes-Benz among Electric Vehicles

    It was at the 2016 Paris Motor Show that Mercedes-Benz first presented its new product and technology brand for electromobility, the Mercedes-Benz EQC Concept. The EQC (combined power consumption: 22.2 kWh/100 km; combined CO2 emissions: 0 g/km, provisional figures) is the first Mercedes-Benz vehicle to be launched under the EQ brand.

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    With its seamless clear design and colour highlights typical of the brand, it is a pioneer for an avant-garde electric look while representing the design idiom of Progressive Luxury. 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. These are accompanied by dynamic performance, thanks to two electric motors at the front and rear axles with a combined output of 300 kW. A sophisticated operating strategy enables an electric range of more than 450 km according to NEDC (provisional figure).

    The EQC was launched at the second edition of the me Convention in Stockholm, Sweden. The event, which is a collaboration between Mercedes-Benz and South by Southwest, has a festival-like atmosphere full of keynote presentations, solo talks, panel discussion and workshops, with over 100 innovative speakers from over 20 countries worldwide.

    As the first Mercedes-Benz model under the new product and technology brand EQ, the EQC embodies the design idiom of Progressive Luxury. This arises from the combination of a previously unknown beauty, the conscious clash of digital and analogue elements as well as the seamless merging of intuitive and physical design.

    A striking feature at the front is the large black-panel surface enclosing the headlamps and grille. For the first time, the black panel is bordered at the top by an optical fibre as a visual link between the torch-like daytime running lamps as a typical Mercedes-Benz feature. At night this creates an almost uninterrupted, horizontal light band. The inner housings and tubes of the standard MULTIBEAM LED headlamps are in high-gloss black. Contrasting colour highlights discreetly confirm the model’s membership of the new EQ family: blue stripes on a black background, and MULTIBEAM lettering also in blue.

    The high-quality interior of the EQC also pioneers an avant-garde electro-look. One example is the ribbed edge of the instrument panel, which resembles the cooling ribs of a hi-fi amplifier. The instrument panel is designed as a driver- oriented cockpit. The typical Mercedes-Benz wing profile is asymmetrical, with a “cut-out” in the driver area. This is where one of the visual highlights of the cockpit is located – a high-tech, high gloss cassette housing flat air vents with key-shaped, rosé-gold coloured louvres.

    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.

    To reduce power consumption and increase dynamism, the electric drivetrains are configured differently: the front electric motor is optimised for best possible efficiency in the low to medium load range, while the rear one determines dynamism. Together, they generate an output of 300 kW and a maximum torque of 765 Nm.

    Mercedes-Benz engineers have enhanced noise comfort with a number of measures. In the EQC the powerpacks are isolated by rubber mounts at two points: where the powerpack connects to its subframe and where the subframe connects to the body. This effective isolation is supplemented with insulation measures. As a result, the interior of the EQC is extremely quiet.

    The lithium-ion battery, which has an energy content of 80 kWh (NEDC) supplies the vehicle with power. The power consumption and range of electric vehicles depend very much on the driving style. The EQC supports its driver with five driving programs, each with different characteristics: COMFORT, ECO, MAX RANGE, SPORT and an individually adaptable program. In the more economical driving modes, the haptic accelerator pedal that prompts the driver to conserve power plays an important role. The driver is also able to influence the recuperation level using so-called paddles behind the steering wheel.

    The ECO Assist system gives the driver comprehensive support when driving predictively: by prompting the driver when it is appropriate to come off the accelerator, e.g. because the vehicle is approaching a speed limit, and by functions such as coasting and specific control of recuperation. For this purpose, navigation data, traffic sign recognition and information from the intelligent safety assistants (radar and stereo camera) are linked and processed.

    As standard the EQC is equipped with a water-cooled onboard charger (OBC) with a capacity of 7.4 kW, making it suitable for AC charging at home or at public charging stations.

    Charging at a Mercedes-Benz Wallbox is up to three times faster than at a domestic power socket. It is faster still with DC charging – which is standard for the EQC – for example via CCS (Combined Charging Systems) in Europe and the USA, CHAdeMO in Japan or GB/T in China. Depending on the SoC (status of charge), the EQC can be charged with a maximum output of up to 110 kW at an appropriate charging station. In around 40 minutes, the battery can be charged from 10 – 80 percent SoC (provisional data).

    By market launch, 200 prototypes and pre-production vehicles of the EQC will have absolved tests covering several million kilometres across four continents (Europe, North America, Asia and Africa). The test program comprises more than 500 individual tests. Like all Mercedes-Benz vehicles, the EQC must absolve the demanding standard test programme. There are also special tests for the electric powertrain, the fuel cell, and the interplay of all powertrain components.

    In the process the test experts are able to build upon the extensive findings from their digital testing work, used to ensure both the buildability of the vehicle and for the simulation of e.g. crash behaviour, aerodynamics and NVH: noise, vibration, harshness. In addition there are intensive tests on numerous test rigs at the Mercedes-Benz Technology Centre in Sindelfingen. The ratio between digital and real testing is roughly 35 to 65 percent.

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