People attending the Volvo Group Innovation Summit in London (UK) got a glimpse of the latest Volvo concept machine, known as the EX2, a 100% electric mini excavator. Volvo Construction Equipment (Volvo CE) demonstrated the EX2 electric mini excavator prototype on May 16th. The electric compact excavator prototype produces zero emissions, 10 times higher efficiency, 10 times lower noise levels and reduced total cost of ownership compared to its conventional counterparts. It is believed to be the world’s first fully electric compact excavator prototype.
There were no estimations as to how much the excavator may cost and according to Volvo, the EX2 is purely a research project and there are currently no plans for industrialization. Thus, we do not know how far off we are from seeing a real electric excavator in the wild.
The EX2 was presented alongside other innovations from across the Volvo Group, including an impressive autonomous refuse truck from Volvo Trucks and an electric bus from Volvo Buses. The innovation summit centered on infrastructure and transport in cities of the future, and focused on how the industry can have a positive impact on society through increased transport efficiency, reduced environmental impact and improved traffic safety.
Volvo defines electromobility as 'commercial vehicles and machines that can utilize an electrical motor to propel or to perform the main purpose of the machine'. To make the EX2 prototype fully electric, the combustion engine has been replaced with two lithium ion batteries, totaling 38KWh, which store enough electric energy to operate the machine for eight hours in an intense application, such as digging compact ground. There were no estimates as to how long it would take to recharge the batteries. The hydraulic architecture has also been replaced with electric architecture which incorporates electromechanical linear actuators that help to optimize the transmission chain. Removing the hydraulic system and the combustion engine, as well as reducing the cooling needs, has led to significantly lower noise levels.
“Volvo CE is committed to contributing to sustainable development. At Volvo CE we are developing technologies connected to electromobility, intelligent machines and total site solutions that will benefit our customers and the environment by contributing to increased machine performance, productivity, efficiency, safety and sustainability. Our future products and services will play an important part in building a sustainable society.”
- Thomas Bitter, SVP of Marketing and Product Portfolio
The EX2 stemmed from the company’s earlier ELEXC research project, which was partly financed by the French government as well as various funding bodies in France. Volvo CE worked with a team of six partner companies which all contributed towards the €7m project. The ELEXC work started in 2012 and concluded in 2015, Volvo CE has since been working on other research projects connected to the EX2, such as durability tests.
“The electrification of construction equipment will produce cleaner, quieter and more efficient machines – this represents the future of our industry. The EX2 is a revolutionary machine. With its zero emissions and ten times lower noise levels, it could easily be used in densely populated areas without disturbing people – even at night. Ten times higher machine efficiency and maintenance-free systems mean that operating costs and total cost of ownership would be significantly reduced. The prototype machine delivers the same power and force as its conventional counterpart, as well as faster speeds in combined movements. And all of this has been achieved without compromising on machine performance, ensuring customer needs would be fulfilled.”
- Ahcène Nedjimi, EX2 Project Leader
Unfortunately, the EX2 is still a concept machine and may never see the light of day, but the innovation is impressive and it's a step in the right direction for a sustainable future.