主题：【原创】比亚迪的电动汽车神话 -- 同人于野

We’d like to introduce you to a car that’s designed to bring a breath of fresh air to the streets: the refreshingly new smart electric vehicle – or smart ed, as we call it. It’s the natural product of smart’s unswerving commitment to the environment and innovation – not to mention fun. It isn’t available to buy just yet, but it isn’t a million miles off. Think of a smart. Then think of an electric socket concealed behind what used to be the fuel cap. Picture the complete absence of exhaust fumes, so no CO2 emissions from the rear. Close your eyes and hear… no sound at all coming from the engine. Imagine no engine oil, no road tax, and no London congestion charge and you’ll start to get a sense of what really makes the new smart ed tick. Powered solely by electricity, and chargeable from any three-pin socket the smart ed can achieve the equivalent of 300 mpg – that amounts to a saving of up to 80% in fuel costs over the already highly economical smart fortwo. The ev can travel up to 72 miles between charges, which typically take around 8 hours for a full charge – ideal for charging at work between your morning and evening commutes. If your journey takes you into the capital, you will find free electricity provided by some London boroughs, as well as free or discounted parking. With a top-up charge during the day, the smart ed’s daily range weighs in at 100 miles. With that in mind, we’re running a market trial with selected blue chip companies who are happy to meet our requirements to power the cars using only renewable energy sources. When we say zero emissions, we really mean it! Among the partners already enrolled in the trial are The Energy Saving Trust, Islington and Coventry Councils, Foster & Partners, CarbonNeutral Company, EDF Energy and Amey. What’s more, our ed hasn’t had to sacrifice any of the fortwo’s performance or class-leading equipment: expect the full complement of Mercedes-Benz safety features and a top speed of 70 mph courtesy of a powerful Zytek electric motor. Once it’s up to speed (0-30mph in an impressive 6.5 seconds) the ev uses its tiny weight gain to deliver an exciting and stable drive. So there you have it: a zero emission vehicle that is 100% smart; a car that will save money and the environment. Although the smart ed won’t be available to the public just yet, it’s definitely something we’re working on. What’s more, towards the end of 2007, customers will be able to try it out at Mercedes-Benz World, Brooklands. We’ll be interested to hear what you think.

Paper battery offers future power

The black piece of paper can power a small light

Flexible paper batteries could meet the energy demands of the next generation of gadgets, says a team of researchers.

They have produced a sample slightly larger than a postage stamp that can release about 2.3 volts, enough to illuminate a small light.

But the ambition is to produce reams of paper that could one day power a car.

Professor Robert Linhardt, of the Rensselaer Polytechnic Institute, said the paper battery was a glimpse into the future of power storage.

The team behind the versatile paper, which stores energy like a conventional battery, says it can also double as a capacitor capable of releasing sudden energy bursts for high-power applications.

While a conventional battery contains a number of separate components, the paper battery integrates all of the battery components in a single structure, making it more energy efficient.

Integrated devices

The research appears in the Proceedings of the National Academy of Sciences (PNAS).

"Think of all the disadvantages of an old TV set with tubes," said Professor Linhardt, from the New York-based institute, who co-authored a report into the technology.

"The warm up time, power loss, component malfunction; you don't get those problems with integrated devices. When you transfer power from one component to another you lose energy. But you lose less energy in an integrated device."

You can implant a piece of paper in the body and blood would serve as an electrolyte

Professor Robert Linhardt

The battery contains carbon nanotubes, each about one millionth of a centimetre thick, which act as an electrode. The nanotubes are embedded in a sheet of paper soaked in ionic liquid electrolytes, which conduct the electricity.

The flexible battery can function even if it is rolled up, folded or cut.

Although the power output is currently modest, Professor Linhardt said that increasing the output should be easy.

"If we stack 500 sheets together in a ream, that's 500 times the voltage. If we rip the paper in half we cut power by 50%. So we can control the power and voltage issue."

Because the battery consists mainly of paper and carbon, it could be used to power pacemakers within the body where conventional batteries pose a toxic threat.

"I wouldn't want the ionic liquid electrolytes in my body, but it works without them," said Professor Linhardt. "You can implant a piece of paper in the body and blood would serve as an electrolyte."

But Professor Daniel Sperling at University of California, Davis, an expert on alternative power sources for transport, is unconvinced.

'More difficult'

"Batteries and capacitors are being steadily improved, but electricity storage is much more difficult and expensive than liquid fuels and probably will be so forever," he said.

"The world is not going to change as a result of this new invention any time soon."

Professor Linhardt admitted that the new battery is still some way from the commercial market.

"The devices we're making are only a few inches across. We would have to scale up to sheets of newspaper size to make it commercially viable," he said. But at that scale, the voltage could be large enough to power a car, he said.

However, carbon nanotubes are very expensive, and batteries large enough to power a car are unlikely to be cost effective.

"I'm a strong enthusiast of electric vehicles, but it is going to take time to bring the costs down," said Professor Sperling.

But Professor Linhardt said integrated devices, like the paper battery, were the direction the world was moving.

"They are ultimately easier to manufacture, more environmentally friendly and usable in a wide range of devices," he said.

The ambition is to produce the paper battery using a newspaper-type roller printer.

GM Eyes Electric Car Initiative -FT

132 words

13 August 2007

5:57:00 AM GMT

Dow Jones International News

English

(c) 2007 Dow Jones & Company, Inc.

LONDON (Dow Jones)-- General Motors Corp (GM) may allow buyers of its Chevy Volt electric car to rent the vehicle's battery as a way of pricing the vehicle at a comparable level to a traditional, petrol-driven family sedan, reports the Financial Times Monday.

The Volt is emerging as one of the most crucial vehicles in GM's history - failure would be a deep embarrassment after the fanfare surrounding its development, the report says. But success could propel GM past Toyota Corp (TM) as a pioneer in alternative energy vehicles, and GM has assigned 150 engineers to the project, according to the report.

一度电 7 分， 15 度就是85 分，一块不到。现在汽油100公里10升，价格 10块多。

感觉真行的不会那么提前报料吧。

鄙人供职于此公司，对此铁电池的性能有所了解。铁电池有广泛的应用，可以在相当大部分领域取代铅酸等种类的蓄电池，电动汽车只是其中之一，在此回答朋友们的一些疑问：

常温充放电循环次数在千次以上。

几十个串联，与铅酸相比的话，不算太重。

电动汽车是个大系统，斗胆猜测万部长当时关注的可能不在电池，尤其是新型电池上。

铁电池作为一种新型二次电池，与prius所使用的镍氢电池相比具有很多的性能优点，更重要的是，目前铁电池具有相当大的成本下降空间，随着扩大产业化，两年之后的价格会比现在低廉得多，届时欢迎您购买。10分钟充电70%的容量，相当于6C充电，偶尔为之，对寿命影响不大，实际上，这种快充也是需要专用设备的支持的。10小时慢充的充电电流会大大低于您估计的40A。

作为企业家，在新技术的宣传上趋利避害是很正常的。语焉不详，自然难免尖锐的质疑。但铁电池的电动汽车应用目前技术层面已无大的障碍，之所以锁定两年后，也是因为有信心在两年内将现存但非致命性的问题解决，从而实现真正意义上的纯电动汽车大规模应用。BYD已经颠覆了二次可充电电池行业，也并非不可能在电动汽车甚至汽车行业内搅它个天翻地覆，朋友们不妨拭目以待。