Tag Archives: electric supercar

Tango vs. Tesla Roadster Drag Race

I’m not an expert on drag racing jargon (“beat the dial handicap so he lost the competition”??) so here is the commentary from video submitter, jorgbrown:

On Nov 30th, the fastest production electric vehicles in the U.S. went head-to-head. While their first meeting had a number of issues, most notably the underfilled Tango battery pack, and the Tesla’s non-upgraded drivetrain, the 1/4 mile time is quite close and indicative of races to come.

In this race, the Tango got 92.15mph in 14.480 seconds, beating its 14.7 “dial” handicap and thus losing the competition; the Tesla got 101.23mph in 14.666 seconds, slower than its 14.5 “dial” handicap and allowing it to proceed to the next round. (Two rounds later, the Tango’s driver got behind the wheel of the Tesla and also beat its “dial” handicap… and thus lost!)

Tesla’s Refrigerator Sized Cooling Problem

Electric cars require cooling systems. Not nearly to the extent that a combustion engine vehicle does, but lithium ion batteries get hot. Put your laptop on your lap for an hour and you might start cooking your own thighs. So you can imagine, thousands of lithium ion batteries will require a significant amount of cooling. There are 6,831 lithium-ion batteries in the Tesla Roadster, each about a third bigger than a typical AA battery. They’re linked together in a unique package that incorporates liquid cooling, safety fuses, and sensors that prevent the cells from experiencing what battery engineers like to call “thermal events.” The batteries feed 410 volts to the Roadster’s air-cooled AC induction motor. Here is the AC cooling system, for the cabin and battery pack:

Telsa Roadster AC Cooling System

Martin Eberhard, former CEO of Tesla Motors, is making the claim that the current cooling pump is working overtime, a lot of overtime. In, fact Eberhard stated that the pump for his Tesla Roadster seemed to be on all of the time, which is completely unnecessary after the car has been parked for an hour or so. Now the ESS cooling system is crucial to the life of the battery, but this is ridiculous. So, Martin Eberhard, being the electrical engineer that he is, installed one of those electric meters you see on the sides of houses ahead of his car’s charging station. Then he charged the car up fully, unplugged it for four days, then measured how much power it took to recharge the battery after the car sat, fully charged and cool, for four days. Doing some math, he found the car consumed 1,278 kWh per year, from just sitting there. That is enough to power two big refrigerators. Not only is this significant on your electrical bill, but this drastically reduces the lifespan of the pump.  Eberhard explains in his blog post:

The second question is the life expectancy of the pump. I expect that Tesla used an automotive-grade pump from a good supplier. I am also sure that no other car leaves a pump running 24/7. Consider a typical car designed to run for 200,000 miles at an average speed of 30 mph. Such a car is designed to run for 200,000 / 30 = 6,666 hours. Let’s say the designers want some room for error, and design the water pump for that car to operate for 10,000 hours without failure. 10,000 hours life expectancy would be a good-quality automotive pump.

Now, let’s run that same pump 24/7 instead of the couple of hours per day it would run in our typical car. Running 24/7, that pump will pass 10,000 hours in only 13 months. That’s all – end of life. Just to make it through Tesla’s 3-year warranty, that pump would need to last 26,280 hours without failure. To last just 5 years, the pump would need to run 43,800 hours. Hopefully, Tesla installed a pump rated for at least 50,000 hours of operation without failure, implying an MTBF of at least 70,000 hours, assuming an exponential failure distribution. Does any automotive parts manufacturer even make such a pump?

Tesla also told Eberhard that the new Drivetrain 1.5, that they guarantee to retrofit all the purchased Tesla Roadsters with, will not make any changes to the pump. However, in a recent article from TIME, Elon Musk responded to Eberhard’s cooling pump complaints and also shed some light on the nature of their tumultuous business relationship:

Eberhard, the ousted cofounder, says Musk interfered with the design of the roadster, demanding changes that were costly and led to delays. These included installing electronic door latches, building a lightweight carbon-fiber body and lowering the doorsill by two inches. “It cost us $1.5 million to lower that doorsill,” Eberhard says. “We would have been better off to have a simpler car shipping a year earlier.” Musk says his design changes were not the cause of delays. Eberhard says that despite Tesla’s green-tech credentials, the roadster has a coolant pump that operates even when the car is parked, wasting as much electricity as two refrigerators. Musk says that will be fixed next month. Eberhard also gripes that Musk controls the board of directors, whose members include his brother Kimbal Musk. “I’m very unhappy about what’s happened to my company” under Elon, says Eberhard, who still owns about 3 percent of Tesla. “I think he’s a terrible CEO.” Elon Musk responds that “Martin is the worst individual I’ve ever had the displeasure of working with.” –TIME, An Electric Car Loses Its Juice

While Eberhard does have a legitimate complaint, keep in mind he probably takes some pleasure in publicly criticizing Elon Musk’s Roadster. But in the end, both sides just want to see the Roadster improved, and hopefully the issue can be fixed fairly easily and cheaply.

Venturi Volage revealed at Paris Motor Show

Venturi Volage

Venturi Volage

Venturi has finally revealed the successor to the Venturi Fetish and they do not disappoint. Working closely with Michelin, they designed a car that redefines the traditional concept of a vehicle. Instead of connecting wheels to a motor and chassis, Venturi and Michelin miniaturized the electric motors and suspension and put them inside every wheel:

MIchelin Active Wheel

The Volage body is basically carbon fiber wrapped around the battery for optimum aerodynamics. The driver will be sitting inside a tub that is the battery and its components, as you can see here:
Venturi Volage

The Volage will have a top speed of 93 mph and a 0-60 in under 5 seconds. It’s not quite as fast as it looks, but it will feature cutting edge technology. The driver will be able to customize the drive settings for speed, economy, or comfort. Each vehicle will be created by hand and the price will most likely be around half a million dollars. You can find out more at the Venturi Volage website.

PRESS RELEASE:

VENTURI VOLAGE

WORLD PREMIERES
The result of close technological collaboration between Venturi Automobiles and Michelin, the Venturi Volage, presented for the first time at the “Mondial 2008” (Paris Motor Show), marks a major step forward in the evolution of the Automobile. This new Venturi incorporates innovations which have enabled radical changes in terms of the vehicle’s architecture, style, dynamic behaviour and, more generally, the design of a modern vehicle.
All these changes constitute several world premières which, with the presentation of the Venturi Volage, reinforce Venturi’s capability for constant innovation, as well as its position as the most advanced company in the field of electric vehicles.

POWER TRANSMISSION & ACTIVE SUSPENSION
With 4 drive wheels with active suspension, the Venturi Volage has no equivalent. “Michelin Active Wheel” technology in fact incorporates 2 electric motors per wheel (1 for suspension and 1 for drive), ie. a total of 8 electric motors piloted in real time by spearhead electronics.
Like the mechanism of a watch, all the components, motors, gear reduction units and suspensions, are miniaturized and built into the wheels.
The active electric shock absorber system allows for total adaptation to the type of road surface and driving. Combining Michelin’s experience in the area of surface liaison with that of Venturi for the chassis, the Venturi Volage represents in its road holding, drivability and silent functioning, the summum of today’s automotive technology.

THE CAR OF THE DIGITAL ERA
Playing down the mechanical aspect in favor of electronics, close to the concept of a robot, this car belongs to a new era, the digital era. Thanks to a dashboard touch screen, the driver can configure the vehicle entirely as he wishes. This total control marks significant progress in terms of management, particularly of the energy stored in the car’s batteries: the driver can, for example, decide to give preference in certain cases to range rather than power, comfort rather than speed, an important factor for an electric car.

A CHASSIS UNIQUE WORLDWIDE
The only part that the Venturi Volage shares with the Venturi Fétish is its carbon fiber bodywork. Developed by the Venturi Design Office, this body is still a unique concept worldwide, as it is the only one to have been specifically designed to be that of an electric car and thus carry batteries within its very structure.
Thanks to this innovative design, both the Fétish and the Volage benefit from an unequalled level of safety, for both the cars’ passengers and also the batteries they carry.
The ideal distribution of the Venturi Volage’s masses – 45% at the front, 55% at the rear – and its perfectly mastered weight of 1,075 kilos enable it to attain 100 km/hr (62 mph) in less than 5 seconds.

PRODUCTION MODELS
A real demonstration of spearhead technology, the car presented in its world première is entirely operational and prefigures the production of a limited series of this model, scheduled as from 2012.
Like the Venturi Fétish assembled in our workshops in Monaco, the Venturi Volage will be assembled by hand, in the form of very limited production.
The technological repercussions of these two cars positioned at the very top end of the market are to be found on other vehicles bearing the Venturi brand, enabling as many people as possible to benefit from the firm’s advances in the field of sustainable mobility.

DESIGN OF VOLAGE, BY SACHA LAKIC
“Like a light and sensual veil, the Volage’s bodywork clings close to its exceptional technical features.
Active suspensions and motors incorporated into the wheels, a flat bottom, aerodynamic tunnels: these choices and technological advances have enabled me to “design the void” usually occupied by the engine and suspensions, and thus explore audacious new paths in terms of styling.
The void is part of the Volage style; it has been designed by subtraction.
Volage has been fashioned by the wind.
The science of aerodynamics is the main tool that has been used to elaborate its shape.
It is easy and enjoyable to imagine the movement of flows of air, on and across its bodywork.
Volage finds itself in a totally original and decidedly contemporary formal category. The relationship with Venturi’s other models is obvious, though it is also possible to see, in a few details, a subtle tribute to certain icons among French cars of the pre-war era, the most elegant, the ones that were way before their time. Volage inspires passion: its powers of seduction are immense.”

PRESS RELATIONS
Marianne HOLLANDE / Clément DORANCE
Email : press@venturi.fr
M : +33.6.78.63.23.52
Venturi Automobiles
Ph : +377 99 99 52 00
Fax : +377 99 99 52 01
THE WORLD OF VENTURI
The Venturi stand is certified « BILAN CARBONE »:
Venturi presents its new range at the “Mondial de L’Automobile 2008” on its stand of 500 m2 in Hall 5/1. The creation of the stand, just like our participation in this event, is certified “Bilan Carbone” which means that all emissions of CO2 connected with our activity have been compensated for.
Our industrial partners :
– MICHELIN Group for the Venturi Volage
– PSA Group for the Berlingo “Powered by Venturi”
– ZEBRA batteries for the Berlingo “Powered by Venturi”
Our partners for the Mondial are:
– The company VESTAS, N°1 in modern energy
– AUTODESK, world leader in 2D and 3D application software
– Our models wear STELLA MC CARTNEY’s dresses
Website:
With the arrival of its new vehicles Volage and Eclectic, Venturi is launching its new dedicated sites www.venturivolage.fr and www.venturieclectic.fr
Venturi spin-off products (including the “Black Feather” longboard www.venturiboards.com) are available from the on-line boutique on the website.

On the Venturi Fetish

Venturi Fetish

The Venturi Fetish became the world’s first production electric sports car when it was unveiled at the 2002 Geneva Motor Show. To this day, it remains the worlds most expensive and rare electric sports car, as only 25 were delivered worldwide. The price range has been around $400,000 to $500,000 over the years. Performance is relatively pedestrian when compared to the electric supercars in development and on the streets now. The Fetish accelerates from 0-60 in just under 5 seconds, with a top speed of only 100 mph and a 150 mile electric range. More information can be found at the Venturi Fetish website.

This is a cool video of the car in action:

The Monoco based Venturi company has since teamed up with French tire maker Michelin, and is going to introduce its next generation electric supercar extremely soon at this year’s Paris Auto show on October 2, 2008. Venturi has two other project cars that heavily utilize solar power, the Venturi Eclectic and the Venturi Astrolab. More can be read about them at the Venturi website here. More info on those vehicles will come soon.

On the Velozzi

Velozzi

With all the buzz surrounding the big name automakers entering EV market, I thought I’d take some time to write about a relatively unheralded upstart looking to take home the Progressive Automotive X Prize. Unheralded, until you find out how many rocket scientists are behind the program, with help from Bayer MaterialScience, Weisman R&D, some aeronautical patent holders, and Saminco Inc., which created the worlds fastest EV (321 mph). The supercar will be a series hybrid, meaning the wheels will be powered completely by four electric motors (at each wheel) with no combustion engine help. However, a small internal combustion engine will be used to recharge the batteries. They have not decided on which fuel the vehicle will use: E85, gasoline, or biodiesel. The team projects the Velozzi will accelerate from 0-60 in an unprecedented sub 3 seconds and have a top speed of 200 mph, all while maintaining a fuel efficiency of 100 to 200 mpg. Roberto Jerez, the company CEO, gave a pretty good update on the Velozzi’s development as of late June for AlternativeEnergy.com. You can find out more about the car and the dream team behind it at Velozzi.org.

Evolution of an Electric Supercar (LiV Rush)

This is a cool old video on the Hybrid Technologies, L1X-75:

This car is now known as the LiV Rush and the Hybrid Technologies website says the beast accelerates from 0-60 in 5 to 6 seconds. Really pedestrian when you compare that to the 3.1 second claim in the video from over a year ago. What’s with the fluctuation? This car was really ahead of its time as a purchasable electric supercar. I’d blame its failure to really take off on its plasticky, kit car aura; as recent electric sport cars have more refined, individual looks. Compare and contrast:
Hybrid TechnologiesTesla Roadster

So that’s where Hybrid Technologies’ most recent evolution comes in. Popular Mechanics gives a pretty good overview of their latest concept electric car. Complete with unique exterior and hopefully a 150-180 mile range. With this still unnamed prototype, Hybrid hopes to compete with Tesla and Fisker for supremacy in the American electric supercar market by late 2009.