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HP Pavilion DV2500 Battery, Apple 16.5V 3.65A

 投稿者:kuai1983@gmail.com  投稿日:2012年 9月19日(水)12時03分33秒
  With current battery systems reaching their performance limits, researchers are scrutinizing every component of lithium-ion cells in order to develop energy storage mechanisms that can make electric vehicles better competitors to fossil-fueled engines.

Lithium-ion systems have made tremendous strides since they were invented in the 1970s. The cells have matured beyond expensive, fire-prone energy systems, becoming the go-to chemistry to power new mobile devices and electric vehicles. Still, prices need to drop further and the batteries themselves need be more durable to drive electric cars into more driveways and garages.

"None of us can predict with certainty what the next big industry will be, or where the new jobs will come from," Obama admitted. But historically, he said, the government has funded basic research that the private sector hesitated to fund itself. Decades later, some of these early forays in laboratories gave birth to entire industries, such as those built around the Internet and the Global Positioning System.

Interest in electric vehicles (EVs) and plug-in hybrids has come on strong over the past year or so, pushed relentlessly by carmakers promoting a newer, greener generation of transportation. As the Chevy Volt, Ford Transit Connect Electric, Nissan Leaf and others trickle out into the marketplace over the next year, it’s clear that they will go only as far as their lithium ion batteries can take them (which right now isn’t all that far).

A research group at the University of Illinois has developed technology that may have lasting implications for electric vehicles (EVs) and other electronics.

The group, led by Paul Braun, a professor of material sciences and engineering, has come up with technology that creates a much more rapid charging time for lithium-ion batteries, which power electronics like cellphones, laptops and defibrillators. Lithium-ion batteries also power EVs, which can take all night to charge at home and up to an hour to charge at EV stations.

To trim weight, researchers have tried several approaches, including the use of thin films of materials laid down as inks. The appeal of paper for centuries?its porous microscopic structure, which makes it ideal for holding onto inks?now intrigues researchers for modern applications, not to mention that paper is also a flexible, lightweight, affordable, well-established technology that is used everywhere and could be made from renewable sources.

A new public-private partnership was announced today between CalCEF and the U.S. Department of Energy’s Lawrence Berkeley National Laboratory. The goal of this new partnership ? dubbed CalCharge ? is to create a regional ecosystem to spur innovation in energy storage (battery) technologies.

This group will bring together private technology companies, academic institutions, and government resources in California’s Bay Area to help accelerate the timeline from market to bench through technology assistance, workforce training and market education.

A person’s arsenal of wireless communications devices?smartphones, tablets, laptops, et cetera?places a heavy burden on surrounding cell towers. But when storms or power surges interrupt electrical service, these towers are forced to rely on a costly and environmentally unfriendly combination of lead-acid batteries and diesel generators to keep wireless users connected.

The University of California, Riverside is now using a bank of lithium ion batteries to help reduce its peak electrical load, while creating a powerful engineering research lab. Housed in the Winston Chung Hall, this 1.1 Megawatt-hour battery bank is one of the largest battery storage systems currently installed in a university setting.

The periodic table neatly arranges the elements into columns. Those elements that share a column are supposed to possess (roughly) similar chemical properties. Most people who know the table well and use it every day?which includes virtually every chemist, biochemist, materials scientist, and lots of engineers?hardly give it a thought, but the predictions of the table are some of the oddest facts in nature.

The laws that govern most of the phenomena before our very eyes?everything from cellular metabolism to a laptop’s batteries?are dictated by the chemistry of the elements, but we rarely realize how weird and wonderful the underlying forces are.

Increased power output makes for a great capacitor as well, by efficiently storing charge and delivering that energy precisely when it is needed. Their work, Shao-Horn said, could "lead to a device with performance that bridges batteries and electrochemical capacitors."

But with high gasoline prices and increased global competition, the U.S. government has taken a renewed interest in developing and producing next-generation batteries within its borders. "Energy storage now is very strategic, not only for Argonne, but for the country," Amine said. "Whoever develops the technology will become the Saudi Arabia of batteries, so obviously it's very critical to get the technologies."

A new DOE agency, the Advanced Research Projects Agency-Energy, is key to the president's vision of scientific "breakthroughs" that can reshape energy, generate jobs and sharpen the United States' competitive edge.

Obama gave ARPA-E, as it's known, its first endowment in the American Recovery and Reinvestment Act. Over the past year and a half, the agency sought out "game-changing" technologies now in their infancy at research labs, startup companies and some adventurous larger firms. It tried to assess the best projects, granted them between $1 million and $5 million, and issued this challenge: over three years, to advance their technology to a point where the private sector will snap it up.

When researchers add these M13 nanowires to a water solution

 投稿者:kuai1983@gmail.com  投稿日:2012年 6月17日(日)16時57分27秒
  Layer-by-layer assembly and chemical-vapor deposition are not the only ways to make nanostructured materials that could improve energy storage. Angela Belcher, a professor of materials science and engineering, has come up with another one: programming viruses to make electrodes for more powerful batteries.

Belcher first thought of using viruses for materials science in the late 1990s. Viral genomes, after all, are essentially blueprints for building highly ordered, reproducible molecular structures from the bottom up--the same thing materials scientists try to do in the lab.

And viruses are made up of proteins, which bind their targets very selectively, so they are reliable building blocks. Now Belcher has successfully hijacked viral replication to build battery materials. In her years at MIT, she has collaborated on this work with many other Institute researchers, including Hammond, Chiang, professor of materials science and engineering Gerbrand Ceder, and associate professor of chemical engineering Michael Strano.

On the other hand, the right business maneuvering could provide a lucrative payday to Searson and Poehler, as well as to a handful of their lab co-workers. Like most researchers who discover something with commercial potential, Searson, Poehler and their colleagues were careful to file a patent before they publicly released any of the findings.

The university owns the patent, but profits or license fees are split so that one-third goes to the university, one-third to the researchers and one-third to the lab for its future research. If the numbers involved become very large, the researchers' personal share declines to roughly 15 percent.

For the moment, however, the Johns Hopkins plastic battery seems to be hung up on a catch-22 that frequently plagues labs looking to market technology in early development; the project needs more funding to reach the next stage of development but the financial backers want to see more highly developed technology before they will loosen the purse strings.

M13 was also a good virus for Belcher's purposes because it is long, thin, and uniform in size: "We lucked out with the shape," she says. Coating the engineered viruses with iron phosphate turns them into nanowires. When researchers add these M13 nanowires to a water solution of carbon nanotubes, they bind tightly to the nanotubes, which are also long and thin.

Beyond such funding obstacles, the plastic battery faces tough competition from several other promising types of batteries, including zinc-air batteries and lithium batteries. Each of those technologies has hundreds of millions of dollars of investment and a critical headstart. Some have already been manufactured on a large scale. Like the plastic battery, they're efficient, lightweight and compact.

One way to improve the performance of a lithium battery is to try combining the lithium with other elements, as Yet-Ming Chiang did to create A123's batteries: he doped nanoparticles of the electrode material lithium iron phosphate with metal to create a material that charged and discharged 10 times as fast as lithium-ion batteries then on the market.

But such phenomenal success with that approach is rare, says Gerbrand Ceder. "Cumulatively, tens of thousands of lithium compounds have been made," he says. "Out of that, there have been three or four interesting ones." Lithium-polymer batteries, for one, can be molded into almost any shape, even cut into pieces without losing their charge.

To improve the odds, Ceder tests out battery materials in a computer model before turning to the lab bench. "The value of virtual experimenting is that it tells you what is possible and what is not possible," he says. "Some argue it is too idealized, but that is its strength as well."

A scientist using trial and error might keep trying something that is actually impossible, mistakenly assuming that faulty technique is the problem. Conversely, a shortcoming in an experimental setup might cause a potentially useful material to be rejected as hopeless. Computer modeling prevents such scenarios from holding up experimental progress.

Chiang, meanwhile, is moving on from his success with A123's lithium batteries. "The high-power lithium-ion battery is a reality and is maturing at a fast rate," he says. "Now we understand power. Going forward, the bigger challenge is getting higher energy density."

Higher energy density is important for tiny batteries like the ones that power pacemakers and other implantable medical devices; the more total energy they can hold, the longer they last and the less frequently they need to be replaced. But achieving it is challenging, because the smaller a battery gets, the less energy per unit volume it can store. "Extrapolation of the existing technology will never get you there," says Chiang.

Seeking energy-dense batteries for microdevices, the U.S. Defense Advanced Research Projects Agency recently put out a call for a battery 10 cubic millimeters in volume with an energy density comparable to that of early lithium-ion batteries: 200 watt-hours per liter. "Getting a density comparable to that of today's lithium-ion technology in a microbattery is extremely difficult," says Chiang.

Part of the problem is that as size decreases, the packaging and electrical connections account for an increasingly large portion of the battery. By redesigning the electrodes and packaging, however, he has made a five-cubic-millimeter battery that holds 650 watt-hours per liter--half the size and more than three times the energy density that the military sought.

A new way of making battery electrodes based on nanostructured metal foams has been used to make a lithium-ion battery that can be 90 percent charged in two minutes. If the method can be commercialized, it could lead to laptops that charge in a few minutes or cell phones that charge in 30 seconds.

The methods used to make the ultrafast-charging electrodes are compatible with a range of battery chemistries; the researchers have also used them to make nickel-metal-hydride batteries, the kind commonly used in hybrid and electric vehicles.

A lithium-ion battery electrode described this week in the journal Nature can deliver electricity several times faster than other such batteries. It could be particularly useful where rapid power bursts are needed, such as for laser weapons or hybrid race cars.

Re: speed at which the ions can move from layer to layer limits

 投稿者:drTozMDjAYP  投稿日:2012年 6月 7日(木)16時05分16秒
  > No.6[元記事へ]

?入??内容                                                            您可以使用?些 HTML ??: <abbr> <acronym> <blockquote> <cite> <code> <del> <q>                                                                                wiondw.smc_reload=function(url){       if(!url)url=window.location.href.replace(/#.*|&delete.*|\?redirect_to.*|&smc_info.*/i,'')+'#smc_sync';       wiondw.location.href = url;       setTimeout(function(){location.reload()},1300);     }if(window.smcJS){if(window.jQuery)jQuery(document).ready(function(){smcJS.smc("?接登?后,您可以在后台?置您的个人?料和????",0);});else smcJS.documentReady(function(){smcJS.smc("?接登?后,您可以在后台?置您的个人?料和????",0);});}    您可以用微博或人人网等?号?接登?,并同???您在此?表的??:)有人回???件通知我

Re: speed at which the ions can move from layer to layer limits

 投稿者:xSibGTZQVBdk  投稿日:2012年 6月 7日(木)14時11分52秒
  > No.6[元記事へ]

Noticed that there were some less than stellar reivews, but this battery is exactly what it says, a battery.  Just to confirm a couple of things: - There are no instructions in the packaging - Plug it into the hole where your old battery was - Stores electricity after being charged Had it for a couple weeks now and works great.  Such a bargain compared to other batteries for these laptops.  If you need a battery for an HP model in the list, pick this up.

Re: though mobile tracking could make this much easier

 投稿者:lXgjGgZW  投稿日:2012年 6月 7日(木)13時22分37秒
  > No.11[元記事へ]

i was a little norveus in ordering a charger online because i didn't really think it would accomplish as much as my hp battery did before my older sibling damaged it but this battery works great its honestly good quality and quantity it doesn't drain out fast honestly its real fair i didn't want to order it because some reviews said it drains quickly but now that i am experiencing it, it does not drain quickly its a good battery and i recommend it for all hp g60 laptop users

Re: speed at which the ions can move from layer to layer limits

 投稿者:yBxGoNEfarS  投稿日:2012年 6月 7日(木)13時04分6秒
  > No.6[元記事へ]

Be sure to get the  RoHs  battery feeutrad here. I purchased a 9 cell battery from another seller at about the same time as this 9 cell battery. This one holds a 3 hour 40 minute (plus time to spare) charge (I tested with media player playing the first half the time and a backup running the second half   no idle time) and the other barely gets past 2 hours. HUGE difference. Also the other battery gets warm   not this one. Nice! I highly recommend this product. As for the seller, the shipping time was fast and the price is decent, esp for what you're getting (it's like two thirds cheaper than buying direct from Dell if I'm not mistaken). One one of the best buys I've made over the past 12 months. Kudos!

Re: speed at which the ions can move from layer to layer limits

 投稿者:NyEiFSImNGz  投稿日:2012年 6月 7日(木)12時17分13秒
  > No.6[元記事へ]

The first gotcha was that this btraety is quite a bit bigger that the one it replaced (RN 873) but it fit the slot fine.  Just stick out and down a little. Second gotcha was absolutely no directions which should be not problem but Apparently Dell uses a Smart Power system which has thousands of complaints on the internet. Anyway, I powered down, installed btraety and powered up.  Power options said 63%.  OK so far.  12 hours later still 63% .Uh Oh. Long story (about 7 hours of Internetting, calling, attempted BIOS flashes etc) developed many horror stories about LIon batteries and Dell power adapter. The dreaded  unknown device  syndrome. Here's how Dell recommended a reset.  First, power down and remove btraety.  Second, unplug AC Power adapter from computer AND wall.  Third-Wait till green light goes out. In my case, went and got coffee and watch a show. Fourth   plug adapter into wall and computer and power up WITHOUT the btraety installed.  After boot up, insert the btraety. It worked?!!?!

Re: speed at which the ions can move from layer to layer limits

 投稿者:QwRxlvzPUHex  投稿日:2012年 6月 7日(木)12時10分12秒
  > No.6[元記事へ]

For those that are confused about the psyaichl size of the replacement battery, this is an extended size battery. There is the standard size that is flush with your laptop when inserted and there are the extended sizes that protrude out approximately one inch from the back of your laptop. You will find this same protrusion on any extended size battery you purchase directly from Dell; it will stick out the back a little and that is normal. The standard size is a six cell battery and will give you a shorter run time on a charge. This is a nine cell battery; this is how they get more run time out of the battery  it's bigger ;  Considering the same size battery from Dell for an Inspiron 1525 costs $179; I would say paying $39 is a bargain (price I paid at time of purchase). It would still be a bargain even if it lasts only half as long.  You can save yourself some headaches though on having to replace your battery more often than necessary:- If you generally have your laptop plugged in and the battery is sitting there fully charged all the time, unplug it and let the battery run down a bit (about 40%) and then remove it.  Your laptop will function just fine without the battery.  When you need to use the battery, put it back in, let it charge up a bit, and use it.I can't give this product a five star rating as I haven't had it for an extended period of time. I received it, plugged it in, discharged it, and then charged it up to full   it shows about 6.5 hours of run time with the backlight on the LCD at dim.  Ran it down to 40% and put it away for storage. I'll come back and edit this review a few months down the road.[EDIT - Addition - Jan 31, 2011] Well, a few months down the road has passed by. First, a little background info so you can relate my usage to what I am saying. I am a full time tech college student, I drive a small fifteen minutes both ways to campus, and I attend class four days out of the week. I have the computer on pretty much the whole time as that is where I store my notes, take my notes, and do some of my homework. I use the the battery fairly frequently. With all that use my battery still reads 6.5 hours. Not sure if it is reading right or not, but it does hold a charge through all my classes down to about the 15-20% mark at worst (depending on usage). I do keep the battery on power saver settings while in school; display dimness turned all the way down, display turns off in 3 minutes, goes to sleep in fifteen minutes, and WiFi turned off unless I need to look something up. I do occasionally turn the display brightness up, but turn it back down after. One needs to realize that the more you are demanding out of your laptop it will shorten how long your battery will keep the laptop running; I am pretty much using it for Office 2007. I remove the battery on the weekends as I can run it off the power cord at home.I have been pretty satisfied with the battery, so much that when my wife's laptop (Inspiron 1525) had her battery kick the bucket I went and ordered one for her also (she has the same brand/model laptop as I do). I would buy this battery again and am changing my rating for it to a five star.[EDIT - Addition - October 10, 2011]It has been almost a full year since I bought this battery and it is still going strong. I cannot really add anymore to this than I already have. I am still using this on a regular basis in school and manage to run through my 3-4 hour classes with roughly 15% charge left. I have even made it through my Wednesdays this semester which run me from 10am-4pm with running on very conservative settings (display dimmed as often as possible).I am very pleased with this battery and my wife's battery also.

Re: speed at which the ions can move from layer to layer limits

 投稿者:odkCopVuEDe  投稿日:2012年 6月 7日(木)11時58分40秒
  > No.6[元記事へ]

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Re: speed at which the ions can move from layer to layer limits

 投稿者:PQmsZAflgWCYTdbtJLY  投稿日:2012年 6月 7日(木)11時00分11秒
  > No.6[元記事へ]

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