It was transformed from diesel to electrical energy by trade companions (see under) along with Bern College of Utilized Sciences BFH, the NTB Interstaatliche Hochschule für Technik Buchs and Swiss lab Empa.
It has been constructed particularly to move lime and marl rocks, 20 instances a day, 65 tonne sat a time, from a mountain ridge quarry within the Bernese Jurato right down to a processing plant within the valley.
Because it comes down heavy and drives again up mild, preliminary calculations counsel that electrical energy generated from regenerative braking on the best way down will likely be enough to switch all power used to get the empty truck again up hill – it should by no means want charging from an exterior supply. “The precise power stability of the eDumper will likely be proven by investigations in on a regular basis operation over the following few months,” based on Empa in April.
It took 18 months to design and, if all goes to plan, will haul at the very least 300,000 tonnes of rock per 12 months over the following 10 years, saving, once more in accordance topreliminary calculations, 1,300 tonnes of CO2 manufacturing and the consumption of 500,000 litres of diesel in whole.
Tyres are virtually 2m in diameter
In an earlier life it was a Komatsu HD 605-7 working in the identical quarry. This was initially instrumented by Bern College of Utilized Sciences to see if the conversion was doable. Then the BFH Power Storage Analysis Centre evaluated appropriate Li-ion cells and cooling strategies in opposition to the information, then constructed and examined a prototype battery module.
Additional unique truck knowledge – together with vibration and warmth data – went to Interstate College of Utilized Sciences Buchs which dealt with the design of the holders and cooling that might carry the modules collectively into the ultimate battery. “It is usually answerable for monitoring the eDumper battery in actual use,” mentioned Empa – which itself was answerable for fireplace security inside the battery ought to mechanical or electrical abuse trigger an issue. “By no means earlier than has a land car been geared up with such an enormous battery pack,” it mentioned. “eDumper is now designed in such a manner failing cell can’t have an effect on neighbouring cells.”
Utilizing largely customized main parts, the bodily conversion befell at Kuhn Schweiz, and included an Oswald Motoren synchronous drive motor, Puls Getriebe gearbox, Aradex inverters and batteries from Lithium Storage. The battery administration system comes from Esoro.
Hydraulic pumps for the disc brake system, tilting mechanism, servo help and pre-loading the secondary brake system are pushed by separate 200kW Brienzer Motoren electrical motor.
Quarry-owner Ciments Vigier paid for the work, and Komatsu importer Kuhn Group was additionally concerned.
The 600kWh battery is in 4 blocks, situated within the engine compartment quite than as an alternative of changing the previous diesel tank. It consists of 1,440 nickel manganese cobalt cells, most likely equipped by Chinese language producer Shenzen Westart.
“Nickel manganese cobalt cells are additionally the selection of the German car trade relating to the following technology of electrical vehicles,” mentioned Empa battery professional Marcel Held. Within the case of battery malfunction “some batteries begin smoking, others burst into flames,” he added. “The essential factor on this occasion is to ensure the neighboring cells are usually not broken by the fireplace and warmth, in any other case there may be the chance of a series response.”
Slopes of as much as 13% are concerned in returning to the quarry, the place the motor consumed as much as three,000A. 40kWh of cost is on the market on the return journey.
“If using the brand new car proves profitable, Ciments Vigier might energy as much as eight autos purely electrically in the long term,” based on Empa. “For Kuhn Schweiz AG this opens up new fields for large-scale building machines, resembling in tunnel building or in residential areas which might be delicate to exhaust fuel and noise.”
Images: Andreas Sutter, Lithium Storage GmbH
As soon as Northumberland-based (and now scrapped) Huge Geordie, the three,000 tonne strolling earth mover, was an electrical car – though didn’t carry its personal batteries however was quite plugged into the grid.