>From the ET list. Lawrence Rhodes.....
Posted by: "Remy Chevalier" [email protected]
Date: Sun Sep 2, 2007 9:50 am ((PDT))
Startup Says See You Later, Batteries!
Breakthrough Power Technology Claims to Deliver 500 Miles on 5-Minute Charge
By GRANT SLATER
AUSTIN, Texas -- Aug. 31, 2007-
Millions of inventions pass quietly through the U.S. patent office each
year. Patent No. 7,033,406 did, too, until energy insiders spotted six words
in the filing that sounded like a death knell for the internal combustion
An Austin-based startup called EEStor promised "technologies for replacement
of electrochemical batteries," meaning a motorist could plug in a car for
five minutes and drive 500 miles roundtrip between Dallas and Houston
By contrast, some plug-in hybrids on the horizon would require motorists to
charge their cars in a wall outlet overnight and promise only 50 miles of
gasoline-free commute. And the popular hybrids on the road today still
depend heavily on fossil fuels.
"It's a paradigm shift," said Ian Clifford, chief executive of Toronto-based
ZENN Motor Co., which has licensed EEStor's invention. "The Achilles' heel
to the electric car industry has been energy storage. By all rights, this
would make internal combustion engines unnecessary."
Clifford's company bought rights to EEStor's technology in August 2005 and
expects EEStor to start shipping the battery replacement later this year for
use in ZENN Motor's short-range, low-speed vehicles.
The technology also could help invigorate the renewable-energy sector by
providing efficient, lightning-fast storage for solar power, or, on a small
scale, a flash-charge for cell phones and laptops.
Skeptics, though, fear the claims stretch the bounds of existing technology
to the point of alchemy.
"We've been trying to make this type of thing for 20 years and no one has
been able to do it," said Robert Hebner, director of the University of Texas
Center for Electromechanics. "Depending on who you believe, they're at or
beyond the limit of what is possible."
EEStor's secret ingredient is a material sandwiched between thousands of
wafer-thin metal sheets, like a series of foil-and-paper gum wrappers
stacked on top of each other. Charged particles stick to the metal sheets
and move quickly across EEStor's proprietary material.
The result is an ultracapacitor, a battery-like device that stores and
releases energy quickly.
Batteries rely on chemical reactions to store energy but can take hours to
charge and release energy. The simplest capacitors found in computers and
radios hold less energy but can charge or discharge instantly.
Ultracapacitors take the best of both, stacking capacitors to increase
capacity while maintaining the speed of simple capacitors.
Hebner said vehicles require bursts of energy to accelerate, a task better
suited for capacitors than batteries.
"The idea of getting rid of the batteries and putting in capacitors is to
get more power back and get it back faster," Hebner said.
But he said nothing close to EEStor's claim exists today.
For years, EEStor has tried to fly beneath the radar in the competitive
industry for alternative energy, content with a yellow-page listing for an
indiscriminate office building and a handful of cryptic press releases.
Yet the speculation and skepticism have continued, fueled by the company's
original assertion of making batteries obsolete - a claim that still
resonates loudly for a company that rarely speaks, including declining an
interview with The Associated Press.
The deal with ZENN Motor and a $3 million investment by the venture capital
group Kleiner Perkins Caufield & Byers, which made big-payoff early bets on
companies like Google Inc. and Amazon.com Inc., hint that EEStor may be on
the edge of a breakthrough technology, a "game changer" as Clifford put it.
ZENN Motor's public reports show that it so far has invested $3.8 million in
and has promised another $1.2 million if the ultracapacitor company meets a
third-party testing standard and then delivers a product.
Clifford said his company consulted experts and did a "tremendous amount of
due diligence" on EEStor's innovation. EEStor's founders have a track
record. Richard D. Weir and Carl Nelson worked on disk-storage technology at
IBM Corp. in the 1990s before forming EEStor in 2001. The two have acquired
dozens of patents over two decades.
Neil Dikeman of Jane Capital Partners, an investor in clean technologies,
said the nearly $7 million investment in EEStor pales compared with other
energy storage endeavors, where investment has averaged $50 million to $100
Yet curiosity is unusually high, Dikeman said, thanks to the investment by a
prominent venture capital group and EEStor's secretive nature.
"The EEStor claims are around a process that would be quite revolutionary if
they can make it work," Dikeman said. Previous attempts to improve
ultracapacitors have focused on improving the metal sheets by increasing the
surface area where charges can attach.
EEStor is instead creating better nonconductive material for use between the
metal sheets, using a chemical compound called barium titanate. The question
is whether the company can mass-produce it.
ZENN Motor pays EEStor for passing milestones in the production process, and
chemical researchers say the strength and functionality of this material is
the only thing standing between EEStor and the holy grail of energy-storage
Joseph Perry and the other researchers he oversees at Georgia Tech have used
the same material to double the amount of energy a capacitor can hold. Perry
says EEstor seems to be claiming an improvement of more than 400-fold, yet
increasing a capacitor's retention ability often results in decreased
strength of the materials.
"They're not saying a lot about how they're making these things," Perry
said. "With these materials (described in the patent), that is a challenging
process to carry out in a defect-free fashion."
Perry is not alone in his doubts. An ultracapacitor industry leader, Maxwell
Technologies Inc., has kept a wary eye on EEStor's claims and offers a
laundry list of things that could go wrong.
Among other things, the ultracapacitors described in EEStor's patent operate
at extremely high voltage, 10 times greater than those Maxwell manufactures,
and won't work with regular wall outlets, said Maxwell spokesman Mike Sund.
He said capacitors could crack while bouncing down the road, or slowly
discharge after a dayslong stint in the airport parking lot, leaving the
Until EEStor produces a final product, Perry said he joins energy
professionals and enthusiasts alike in waiting to see if the company can own
up to its six-word promise and banish the battery to recycling bins around
"I am skeptical but I'd be very happy to be proved wrong," Perry said.
Copyright =A9 2007 ABC News Internet Ventures
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