Liebherr and Designwerk develop electric truck mixers

Equipment manufacturer Liebherr and electric mobility company Designwerk have combined to develop fully electric truck concrete mixers with 10m³ and 12m³ drums on a 5-axle chassis.
July 8, 2020
Liebherr’s new fully electric ETM 1205 truck mixer
Liebherr’s new fully electric ETM 1205 truck mixer

The companies say the move is designed to reduce the carbon footprint of the global concrete supply sector.

Liebherr adds that the ETM 1005 and 1205 truck mixers transport large quantities of concrete to the construction site quietly and reliably without exhaust emissions. Charging is normally only necessary at night due to the large accumulator capacities.

According to Liebherr, the Futuricum chassis can cope with the weight of the concrete quite easily, and there is an energy recovery system in place so that braking further increases the range of the truck and reduces operating and maintenance costs.

Liebherr and ZF developed a drum drive consisting of a low-maintenance unit and efficient unit of electric motor and gearbox. The truck and the truck mixer body are powered jointly by the traction battery, which helps to remove the need for power electronics components.

The compact electric drive for the mixing drum is flanged directly to the drum and is designed to ensure that power consumption for relieving the traction battery of the Futuricum truck remains low.

Liebherr claims it also eliminates the need for hydraulic components such as hose connections and pumps.

The first units to go into operation will work for Liebherr customers Holcim and KIBAG in Switzerland.

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