Tesla Model Sec Vs Sunswift Eve.. 500 Km Make On 1/5 The Battery Capacity
Recently EV News had the chance to test drive ii electrical vehicles amongst 500 km make inside a fortnight of each other. One, a Tesla Model south P85+ together with the other a basis tape breaking electrical car, the University of New South Wales Sunswift eVe solar race car.
I wrote last year how inwards many ways the ii portion a mutual heritage amongst applied scientific discipline inwards the Tesla having a straight evolutionary path from the initiatory World Solar Challenge inwards 1987. While I was massively impressed yesteryear my short drive inwards the top-of-the-line Model S, it's interesting to analyse the strengths together with weaknesses of ii EVs that both accomplish the holy grail of plug-in vehicles, 500 km make on a unmarried charge.
Following Sunswift eVe's World Record run inwards July, any production vehicle. The Sunswift squad went through 50 blueprint iterations over three months using Computational Fluid Dynamics (CFD) simulation to achieved a Cd of 0.16. During my exam crusade of eVe, fifty-fifty though the vehicle had both doors removed for slowly access, the lack of aero drag seemed noticeable patch coasting. One squad fellow member told me it takes eVe several kilometers to coast to a terminate from 100 km/h.
While the Model south monocoque is only aluminium, every panel on the Tesla Roadster was carbon fibre together with UNSW has taken that a stride farther together with fabricated the entire chassis from the material. Manufactured through a sponsorship bargain amongst New Zealand theatre Core Builders Composites, the companionship that built much of the America's Cup fleet, the vehicle has a kerb weigh of only 320 kg. Influenza A virus subtype H5N1 Tesla Model south weighs 2100 kg.
The principal make goodness of lite weight when at constant speed is reduced rolling resistance. Approximately 5–15% of the fuel consumed yesteryear a typical automobile may live used to overcome rolling resistance. Sunswift eVe uses Michelin especial gild depression rolling resistance tyres which are run at lxxx psi. While non precisely the same sort of route automobile tires every bit the 285/30 R21 at the parent of a P85+, they are maybe non also far removed from the cycle similar 155/70 R19 tires fitted to the BMW i3.
The combination of nil mechanical transmission losses, high electrical unloose energy efficiency, depression aero drag together with rolling resistance way a sixteen kWh battery made from 1200x Panasonic NCR18650 cylindrical Lithium Ion cells, amongst a pack weight of only 63 Kg, is plenty to give eVe a unmarried accuse highway speed cruising make of over 500 km. That's the same battery capacity every bit a Mitsubishi iMiEV which has a maximum make of 155 km or a Volt which achieves lxx - lxxx Km inwards EV mode. The combined make for Sunswift eVe amongst it's 800 watt solar array connected is 800 km (500 miles).
Although carbon fiber is around twenty times to a greater extent than expensive than steel, BMW believe it is the hereafter of electrical vehicle production together with direct maintain invested €400 1000000 to launch the commencement carbon fibre reinforced plastic (CFRP) production car, the all electrical i3. BMW’s destination is to larn the expense of a carbon-fiber frame downwardly to the degree of aluminium yesteryear 2020. While only the rider cabin of the i3 is made from carbon fiber amongst the crusade train, battery together with suspension attached to an aluminium chassis, it seems only a affair of fourth dimension earlier 100% CF chassis similar eVe larn economically feasible for volume produced route cars.
The side yesteryear side challenge for the Sunswift squad is to brand eVe the commencement road-legal solar-powered automobile inwards Australia. They facial expression it to run into Australian route registration requirements inside every bit fiddling every bit i year.
