BATTERY POWER Ӏ TECHNOLOGY
j Back in 2020 Liebherr brought out their LR 1200.1 all-electric 220-tonne lattice crawler, which they called ‘unplugged.’ It could work by battery or while cable- connected to the mains. In March this year it annonced the LR R 1160.1 ‘unplugged’. Now they are no longer alone. Netherlands- based PV-E Crane B.V. have a range of lattice crawlers, which comes in versions of up to 160 tonnes capacity; and - which would seem to be a first - telecrawlers,
PV-E Crane's crawlers use two removable Lithium- ion batteries that deliver 650 volts
power ranger: up to eight hours use
Italian manufacturer Marchetti has launched an electric version of its 25 tonne CW25.35 Sherpina telecrawler: the CW25.35. According to Marchetti the battery pack is the heart of the crane’s system. It comprises a 450 Vdc lithium battery pack. Depending on the load cycle of the crane the battery pack can provide up to eight hours of autonomous power. Marchetti says the
crane’s electric motor provides a peak power of around 100 kW and the electric pack is managed by a dedicated electronic control unit with specifically designed software for continuous monitoring. The crane also has a small Stage V diesel engine, from Perkins, to recharge
the batteries if an AC mains power outlet is not available. In addition, the company has also launched a regular diesel version of the crane with an AC mains electric motor.
which range up to 120 tonnes. They are all-electric, not hybrid; and their power is from batteries, not cable-from-grid.
Orlando de Jonge is their
sales manager. “We started the company about three years ago; we worked with a transmissions supplier who already had 20 years’ experience in electric vehicles in the automotive and excavator industry, so they already had a proven track record but they had never done anything as big as this. It is the first crane of this capacity that is entirely battery-powered. “We delivered our first model to a Dutch contractor who uses it for pre-cast building. Power is from two Lithium-ion batteries; the first ones were each of 130 KWh, but the suppliers have improved them so they now give 195KWh from the same size pack. We thought they would give eight hours of working on a charge, but we have found that they deliver more than that.” The batteries deliver 650 volts,
are guaranteed for three years or 1000 charge-cycles; charging at 44kWh for six hours from a typical 63amp supply will fully recharge them from empty to full. But recharging might not in future be the responsibility of the crane user. “What is different about our crane is that it has a two-battery set-up” says de Jonge, “and that, unlike on the Liebherr, the batteries are removable. You can run the crane on both batteries for maximum power; or on one battery while you charge the other from the on-board charger; or if you run out of charge you can take the batteries out and replace them with fully-charged ones. “That is the unique selling point of our cranes, and that I think is the step-changing transformation and the way that the future of electric lifting will go. All the equipment on a site will have rechargeable batteries, and they will be modular and interchangeable between f
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