主题：【原创】比亚迪的电动汽车神话 -- 同人于野

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.

现在广泛应用的锂电,两个大问题两个小问题:大问题1.充放循环寿命太低.手机一周一充,算上后来频繁了,3年也还不到300个循环,我的4个手机,短的一年电池已经不行,长的3年上也只有50%待机时间.2.爆炸危险.如果保护电路不工作,那么一定会炸.小问题1.充电速度慢,没见过可以用6-10C来充的.2.和Ni-H比价格贵.

这个新锂电,如此看这大小两类4个问题全能解决,光是取代手机/笔记本/DC的电池,市场已经非常可观了,汽车,还是慢慢来吧,我不认为BYD运作车的水平可以比美TOYOTA,prius已经运作了7年才有今天的成就,BYD也应该要有这样长期坚持的思想准备.

我是外行，不过还有其他因素，比如能量密度可能比锂电池差很多，还有就是体积。

前面有了解的人只是说铁电池基本可以取代铅酸蓄电池。

“两年之后的价格会比现在低廉得多”

现在铁电池的单位AH容量的价格是多少？两年后预计是多少？依据是什么？

电动汽车的致命问题就是电池问题，但电池问题包括价格、容量、重量、可靠性等都解决了，这样的电池的市场远不仅仅是电动汽车，其它领域的收益恐怕会远远大于做电动汽车了，所以这才是更值得关注的地方。

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.

光棍。

这个功率不能这么算的，毕竟小区里的每家每户不会在同一时间给汽车充电，所以负载不可能简单的叠加在一块的。

比如说共用的车库容积是64辆车，那么有12条充电线路应该就足够大家使用了。

还有快速充电如果不考虑电池的寿命影响的话（因为电流大小对铁电电池影响我暂时不知道），不一定要走电网直接供电的线路，充电站很可能使用一个超大电容，类似前一段时间国内哪个城市公交车使用的那种，在等待用户的时候给电容充电，车辆进站的时候电容可以很快的给汽车充电，其实就是使用缓存的思路。

缓存思路在小区充电系统里面肯定也是可行的。

不知道BYD做这个车的定位是什么，目前看市场上已有的hybrid车都是经济型车，不怎么追求性能的。对应的纯汽油机车型，如果是4缸发动机一般动力在110马力上下，也就是70-80千瓦。他这一下子弄出来200千瓦，就是250马力以上，赶上6缸的发动机了。真要这么牛，倒是可以考虑搞个轻车身，说不定在赛场上一战扬名，也是很好的宣传。今年北美的印地赛车中有个用生物燃油的车得了冠军，就狠狠吸引了眼球。

http://news.hexun.com/2008-09-29/109407841.html

[世华财讯]比亚迪股份公布，获巴菲特投资旗舰巴郡旗下MidAmerican入股，比亚迪向MidAmerican配售2.25亿股H股，每股作价8港元，此次集资总额约18亿港元。

　　比亚迪股份(01211)9月29日发布公告称，向股神巴菲特投资旗舰巴郡旗下MidAmerican，配售2.25亿股新H股，占现行H股 39.61%、经扩大后已发行H股总额约28.37%及经扩大后注册资本总额约9.89%，每股作价8港元，较停牌前收市价折让4.76%，集资总额约 18亿港元。

　　比亚迪表示，上述配股集资净额约17.93亿港元，将用于为日后业务发展提供资金，特别是二次充电电池、电动汽车及其它环保措施，及用作该公司的一般营运资金。完成交易后，比亚迪主席王传福于内资股的持股量，将由27.83%摊薄至25.08%，而王传福在H股的持股量将由0.55%摊薄至0.49%。

当年的水变油也风光过，到后来只不过是一个魔术！

希望比亚迪玩的是真的~~~ 那可就是第四次产业革命了！

感觉还是够呛！

这个电动车的疑虑大家都非常多，等正式产品出来后就好了，是骡子是马拉出来溜溜