This is how Mercedes drove its electric prototype 1,000 kilometers on a single charge

While the range of electric cars is often listed as their main weak point, Mercedes has just completed a real-world journey of more than 1,000 kilometers on a single charge, between Stuttgart and Cassis.

Presented at the beginning of the year, the mercedes vision eqxx shows on paper a range of more than 1000 kilometers. A theoretical autonomy that the German brand has just demonstrated in real conditions.

1008 kilometers on the road, 140 kilometers of autonomy on arrival

On April 5 in the early morning, the vehicle left the German town of Sindelfingen, near Stuttgart, with a symbolically sealed cargo port. Indeed, the goal: to get to Cassis on the Côte d’Azur without going through the charging station box.

The sealed port of the prototype.
The sealed port of the prototype. ©Mercedes

A destination reached at the end of the day, after 11 hours and 32 minutes of driving and a remaining range of 140 kilometers, after 1,008 kilometers travelled.

The interest of this experiment is that it was carried out under real conditions, with an average speed of 87.4 km/h, a peak of 140 km/h on the (German) motorway and driving within the authorized limits on the rest of the route. . outside temperature also plays a lot in autonomy: in the course of the EQXX that passed through the Swiss Alps and northern Italy, it was between 3 and 18 degrees, specifies Mercedes.

In 2017, Italian Tesla fans had already traveled 1078 kilometers on a single charge in a Model S, but driving at an average speed of 40 km/h… for 29 hours.

The prototype completed a journey of 1,008 km on a single charge, with 140 km of range remaining on arrival.
The prototype completed a journey of 1,008 km on a single charge, with 140 km of range remaining on arrival. ©Mercedes

Great battery and state-of-the-art aerodynamics.

This prototype has several tricks to achieve this small feat. Logically it starts with an impressive 100 kWh battery. A capacity close to the one with the big EQS sedan, current flagship of the Mercedes range, but with a redesigned architecture. The battery occupies 50% less volume and is 30% lighter, at 495 kg, in the EQXX prototype. An element that reduces the total curb weight of the vehicle to 1755 kg, not bad for a large sedan of almost 5 meters. By comparison, the EQS, at 5.28 meters long, shows almost 2.5 tons on the scale.

Second strong point: a particularly worked aerodynamics, with a coefficient of drag, or Cx, of only 0.17. Bridgestone has also designed specific tyres, with very low rolling resistance.

More anecdotally, the EQXX is equipped with a sunroof. They offer a small recharge without stopping at a terminal. “The 117 solar cells feed the 12-volt battery, which supplies auxiliary consumers such as the navigation system,” explains Mercedes, adding that the savings in the main, high-voltage battery represents the equivalent of 25 kilometers of autonomy.

consumption record

The key is extremely limited consumption: 8.7 kWh per 100 kilometers. A fairly impressive figure for such a journey, in the 100% electric models currently on the market, it is quite necessary to have 17 kWh per 100 kilometers, and more on a journey only on the highway.

Admittedly, it’s still a prototype, but Mercedes plans to introduce the new technologies proven in its EQXX in its next production cars. With its reduced volume, the battery “can be installed in a compact car”, notes the Mercedes press release… Will it perhaps be found in the future A-Class?

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