BATTERY POWER Ӏ SECTOR REPORT
version we make a 125A hour one, which gives a 24V output; and the next one up from the 250 is the 500A hour, which has all the same characteristics but is just a little bit bigger.”
on the job site. A construction
site, for example, may well not have 415V available. A full charge gives an average running time of two hours continuous usage on the spider crane.” Although two hours might not seem long, this is continuous use. “In real life nobody operates a spider crane for two hours continually,” Ainsworth explains. “The crane does a bit of lifting, then a pause, then a bit more lifting: it is on and off. We expect that time to increase. As operators become more familiar with using the machine we’re sure our battery consumption time will extend, too. “We can mount the battery onto the machine; or another option for the customer would be to take an ECube pack and electric motor controller pack. They could then add that to their fleet as a simple bolt-on to any machine they want.” Motives for doing this include
flexibility, economy, and even obtaining the tender for the job in the first place: “We are seeing more and more experiences of construction sites limiting the noise and the exhaust emissions – contractors are paying higher taxes on emissions in London. If you are working a machine running off an ECube those issues disappear.”
26 CRANES TODAY United Rentals’
500KW battery from Termaco
The ECube does not have to be used only on a crane. “There are various other things that we can do with it. It can also act as an emergency power supply: if your office supply goes down, you can plug this in and you have got all your electronics and IT back. It is really portable, so if one of your staff EV cars has run out of power you can simply take this to them, sit the vehicle on charge for an hour or two, and then they can carry on driving themselves. “As well as the 250A hour
TOWER POWER Battery power for cranes is a fast-moving area with both new technologies and new users. Battery start-ups are seeking distributors and crane-rental companies who will hire out their battery-power units along with their cranes. They are also seeking crane manufacturers with whom to form close and continuing relationships. In the USA, for example, United
Rentals (which claims to be the world's largest equipment rental company) has added battery energy systems for tower cranes to its North American rental fleet. Developed by Termaco, and configurable up to 500kW, the system operates alongside a generator to deliver reliable power to support tower crane operations. It minimises generator run time by storing energy in batteries and running on battery power
The Flybrid
Peak Power 200 from Dumarey on Wolffkran’s stand at Bauma
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