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2011年5月16日星期一

Top tips to take care your batteries to the best

With average U.S. gasoline prices approaching $4 a gallon, drivers and automakers are thinking electric. Previously steered in this direction by concerns about pollution and dependence on foreign oil, consumer interest in electric-drive cars continues to surge. But before Americans are able to flip the switch from gasoline to electricity, automakers need batteries(Dell vostro 1520 battery) for the next generation of electric vehicles that can deliver the range, performance, reliability and safety drivers expect.Cheap Dell inspiron 1720 battery
The Large-Volume Battery Calorimeter (LVBC) a crucial tool to help put these new automobiles on the road. Unveiled last year by the U.S. Department of Energy's National Renewable Energy Laboratory (NREL), the LVBC is designed to precisely measure the heat generated by batteries for electric-drive vehicles, analyze temperature's effects on systems, and help pinpoint the ways to manage battery temperatures for the best performance and maximum life. The Vehicle Technologies Program at the Department of Energy supported the development and fabrication of the LVBC for advancing battery technologies for advanced vehicles.
To make electric-drive vehicles that are attractive to consumers, the batteries that power those cars need to be affordable, high-performing, long-lasting, and operate at maximum efficiency in a wide range of driving conditions and climates. The next generation of electric-drive cars and light trucks will be required to travel farther on electric power alone, placing greater energy demands on the vehicles' battery packs. As the packs get larger, regulating battery temperatures become even more important in helping improve performance, lifespan, safety and affordability. The best tool automakers have for assessing thermal control and optimizing battery performance is NREL's LVBC.
"NREL's large-volume battery calorimeter is the first system large enough and accurate enough to test the whole battery systems for electric vehicles," says Dr. Said Al-Hallaj, chairman and CEO of AllCell, a major battery integrator. "We strongly believe that this leading-edge instrument is critical in developing the battery management system of the next generation of electric vehicles."
"Larger and more advanced versions of the lithium ion battery technology that powers laptops are the next wave in energy storage for plug-in hybrid and all-electric vehicles. High temperatures shorten the life of lithium ion batteries, while cold temperatures diminish lithium ion batteries' power capabilities and hurt overall vehicle performance. NREL's LVBC is the only calorimeter capable of accurately quantifying the heat generation and efficiency of these lithium ion batteries(Dell inspiron 1720 battery, Dell inspiron 1520 battery)," said NREL Principal Engineer Ahmad Pesaran, who leads the vehicle Energy Storage projects.
Greatest Volume and Accuracy
The largest and most-accurate device of its kind, the LVBC can determine the exact amount of heat generated by battery cells, modules, sub-packs, and even some full-size packs as they are charged and discharged. It combines a high volume test chamber and wide temperature range options with state-of-the-art thermal isolation and control, current load capabilities and precision measurement.
In addition, the LVBC is the only calorimeter designed to test the liquid-cooled batteries found in the Ford Electric Focus, the Chevy Volt, and the Tesla Roadster. GM used an earlier NREL calorimeter to help create the Volt battery.
"We knew there was a need for this technology. Testing cells and smaller modules in lower-capacity calorimeters was only giving us — and car and battery manufacturers — part of the picture," said NREL Senior Engineer Matthew Keyser, who developed the LVBC.
Despite the LVBC's large size, its heat-flux measurements are extremely precise, recording heat rates as low as 15 milliwatts and heat inputs as low as 15 Joules — about the amount of energy released while rubbing your hands together. Achieving this degree of sensitivity in such a large volume required a number ofdesign innovations, including superior thermal isolation and the ability to test batteries under realistic driving conditions. The instrument is able to determine heat levels and energy efficiency within plus or minus 2 percent of actual values.
Troubleshooting Before Cars Hit the Road
Members of the U.S. Advanced Battery Consortium, which includes Chrysler, Ford and GM, realize that in-depth analysis of battery heat management issues can help automakers troubleshoot thermal issues and engineer systems capable of maintaining batteries within the ideal temperature range. The comprehensive and accurate information that the LVBC provides will be critical to the automotive and battery industry as new advanced batteries and thermal managementsystems are optimized for the next generation of electric-drive vehicles. NREL is testing batteries from a number of battery developers including A123Systems, LGChem-CPI, and Johnson Control Saft in the LVBC.

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2011年4月24日星期日

Quick Tips to make your Twitter stream more valuable and dynamic for followers

With a billion tweets per week, Twitter has become a place for people and organizations of all types to share their thoughts, reading lists and whereabouts. Real estate pros, politicians, non-profits,journalists and small businesses are all using the social platform to connect with their communities and meet organizational goals.
Whether you’re a Twitter novice or tweeting pro, there are always ways to improve your presence on the microblogging service. Here are five ways to make your Twitter stream more valuable and dynamic for followers.

1. Get Visual



A sampling of photos recently tweeted by Gregory’s Coffee
If you’re at a loss for words, try sharing pictures or videos instead. Multimedia adds a new layer to your tweets and lets followers into your business’s otherwise-unknown world.
Gregory’s Coffee, an espresso bar with three locations in New York City, operates a lively Twitter stream, loaded with behind-the-scenes photos of latte art, pastries and employees. The photos give the coffee shop a warm and cozy persona, inviting tweeps to venture over to the shop for a nice cup o’ Joe.
Brands are using photo sharing apps in creative ways to bring fans closer to the action. Using apps, like Instagram and PicPlz, smartphone photographers can take advantage Dell studio 1536 batteryof photo-editing tools, including filters, that can make any picture look more interesting.

2. Get Physical


Social technologies such as Twitter aim to connect people. But the digital world has, in some cases, made it more challenging to genuinely connect with those around us. At tech events, for example, it’s not uncommon to see a group of people standing in a circle, tapping away on their smartphones. Business people should be cognizant of how they are using social media and understand if their behaviors are hurting or benefiting their relationships.
One way to use Twitter for physically connecting with colleagues and customers is to tweet out when employees or reps are attending industry events or making appearances at related venues. Such tweets invite real-life interaction.
The GEM Hotel, a boutique hotel with three locations in New York City, maintains an activepresence on Foursquare, checking in to nearby venues that embody the lifestyle of a GEM patron. The hotel occasionally shares its checkins via Twitter and automatically tweets when it “becomes mayor” or unlocks a badge on Foursquare, adding a bit of playfulness and humanity to its Twitter stream Dell studio 1555 battery.

3. Get Personal



With humble beginnings, many small businesses live on their stories. Talk to a small business owner, and you’ll likely discover a passionate individual who is happy to share every small detail about his or her company’s founding. You’ll learn where it all began, what the founding idea was, how the company grew throughout the years and what unexpected lessons were learned along the way.
In the spirit of that small-time, homey feeling, small businesses on Twitter can tweet about family events, employee softball tournaments and personal anecdotes. There’s a fine line between adding a personal touch and going overboard, though. Boloco, a Boston-based burrito chain that has grown substantially since its first opening in 1997, understands that balance.
Boloco’s Twitter stream is mainly composed of tweets to individuals. Tweet after tweet, marketing maven Sara Steele-Rogers and CEO John Pepper answer questions for and converse with Boloco fans. The two add a more personal touch, though, when special occasions arise. For example, a couple recently got engaged at a Boloco location — and the team was quick to congratulate the love birds on Twitter. Tweets such as this add a personal and intimate flair that showcases a business’s appreciation for its fans.

4. Get Inspired


It’s difficult to be creative all the time — when you’re in a linguistic rut, turn to other tweeters for inspiration. For small businesses, the first stop should always be those who are tweeting about you. When a jewel of an @mention appears, retweet it. Besides sharing a customer’s positive story with your followers, you’ll also be empowering that tweeter. It’s a great feeling when a brand you admire acknowledges your tweet with a simple retweet.
Trapp Family Lodge, a 2,500-acre resort in Stowe, Vermont, spends most of its Twitter stream on retweeting satisfied guests and upcoming visitors. When a user posts a image from the estate or calls out a great experience, you’re sure to find it on the Trapp Family Lodge Twitter account. Such tweets also double as customer reviews for the company, which can drive Dell vostro 1500 battery your business even more.

5. Get Smart


Twitter is all about value — users want value out of the accounts they’re following. Value can come in the form of exclusive deals, contests and even expertise. While deals and contests may take a bit more legwork to get off the ground, expertise is something that any small business owner or rep should be able to share at the drop of a hat.
Face Place, a spa with locations in Los Angeles and New York, dedicates its Twitter stream Dell vostro 1510 battery,Dell xps m1330 battery to providing daily skin care tips. Most recently, the spa has tweeted about makeup-removal tips, how blood sugar levels affect complexion and which foods are rich in omega-3 fatty acids, which are great for your skin.
Try spicing up your Twitter stream with tips and trivia related to your business. Your followers will appreciate the random facts you’re providing and tune in for the next tidbit.

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2011年2月16日星期三

Battery Care:Keep Volt Battery at Ideal Temperature

Engineers of the four-seat Chevrolet Volt electric car often refer to its 435-pound battery pack as the fifth passenger. Given the care taken to keep the pack at just the right temperature in all temperature conditions, there is a lot of truth to that.
The Volt's ability to operate gasoline-free on a day-to-day basis and carry an eight-year/100,000-mile battery warranty is due to active thermal management of the advanced Hp dv9000 battery pack.
"Every battery has a temperature sweet spot where it provides the optimal blend of power output, energy capacity and long life and we keep the Volt right on that target," said Bill Wallace, General Motors director of Global Battery Systems.  Batteries that are too cold are reluctant to release electrons while batteries that run too hot can see a significantly shorter life.
The Volt's T-shaped battery pack consists of 288 individual cells arranged into nine modules. Plastic frames hold pairs of lithium-ion cells that sandwich an aluminum cooling fin. The design and construction of that aluminum plate is critical to ensuring an even temperature distribution with no hot or cool spots across the flat, rectangular cell. The battery pack has its own cooling circuit that is similar to, but independent from, the engine cooling system.
The Dana Corp-manufactured cooling fin consists of two lightweight aluminum plates joined by a proprietary clean nickel-brazing process. The carefully designed grooves stamped into the plates form channels that allow battery coolant that is pumped through the pack to flow over the entire cell surface.
"Three different systems are used to regulate the temperature of the coolant," said Wallace. "When the Volt is plugged in and charging in cold weather, an electric heater at the front of the battery pack is used to warm the coolant and pre-heat the battery. During normal operations, the coolant is passed through a heat exchanger at the front of the car, while a chiller in the air conditioning circuit can be used to dissipate heat from the battery when temperatures really climb."
The management system monitors feedback from 16 thermal sensors arranged throughout the battery pack to maintain a spread of no more than 2 degrees centigrade from the optimal temperature across the pack.
Getting the battery temperature just right was a product of lessons learned from the EV1 and 15 years of testing fuel cell stacks. GM engineers and researchers learned a lot about how to circulate coolant to maintain an even temperature distribution. Those learnings went straight into the cooling system of the Volt battery.
About Chevrolet
Founded in Detroit in 1911, Chevrolet celebrates its centennial as a global automotive brand with annual sales of about 4.25 million vehicles in more than 120 countries. Chevrolet provides consumers with fuel-efficient, safe and reliable vehicles that deliver high quality, expressive design, spirited performance and value. The Chevrolet portfolio includes iconic performance cars such as Corvette and Camaro; dependable, long-lasting pickups and SUVs such as Silverado and Suburban; and award-winning passenger cars and crossovers such as Spark, Cruze, Malibu, Equinox and Traverse. Chevrolet also offers "gas-friendly to gas-free" solutions including Cruze Eco and Volt. Cruze Eco offers 42 mpg highway while Volt offers 35 miles of electric, gasoline-free driving and an additional 344 miles of extended range. Most new Chevrolet models offer OnStar safety, security and convenience technologies including OnStar Hands-Free Calling, Automatic Crash Response and Stolen Vehicle Slowdown. More information regarding Chevrolet models can be found at www.wholesaleeshop.com.au
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2011年1月25日星期二

Near Field Communications is coming in Next-gen iPhone, iPad

iPhone users may soon be able to pay for purchases by merely getting within range of a reader. A new prediction from Envisioneering Group director Richard Doherty indicates such technology is coming in the next-generation version of the iPhone and the next-generation iPad, both of which are expected to debut this year.http://www.wholesaleeshop.com.au/laptop-battery/dell-inspiron-1525.htm
The wireless technology is NFC, or Near Field Communication, and it may already be built into things you carry on a daily basis. Some credit cards come with an RFID chip that can be read at places like convenience stores and gas stations, which often have an NFC reader located just above the normal credit card reader. You can tap or wave your card near the reader and have your purchase amount deducted without having to swipe.
That's largely the extent of the NFC exposure we get here in the US, though other countries (particularly Japan) have been much more progressive in rolling out devices and phones with NFC built-in. If Apple were to implement NFC in the iPhone, it would likely work in the same way—your credit card information would be stored somewhere the phone can access it, and when you wave your phone near a reader (say a vending machine, or the checkout line), your purchase would be deducted instantly.
In addition to offering a handy way to pay for things, NFC in the iPhone could also give Apple an opportunity to offer even more targeted ads. As another analyst—Crone Consulting head Richard Crone—told Bloomberg, Apple could personalize its iAds to specific stores or products that Apple knows the customer already buys. Why does this matter? Ad rates (that is, those paid by the marketing companies) could skyrocket once they're more aware of the products that each customer is into.
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Doherty added that he believes Apple has already created a payment terminal prototype for small businesses that would be able to scan iPhones and iPads with NFC built-in. He says Apple is either heavily subsidizing the terminals or giving them away for free in order to get the tech off the ground.
Although this latest prediction comes courtesy of the not-always-reliable analyst community, the rumor that Apple has been working on incorporating NFC into the iPhone has been around for more than a year. For one, Apple has applied for a number of patents that involve NFC technology, though patents aren't always the best indicator of what will actually make it to market. However, Apple also hired an NFC expert as product manager for mobile commerce in August of last year, giving the speculation a bit more substance.iphone near field thumb from http://www.wholesaleeshop.com.au
As a result, we would hardly be surprised to see NFC surface in an iOS device sometime in the future, though whether it'll come to both the iPhone and the iPad remains to be seen.
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2011年1月19日星期三

New Toshiba netbooks offer all-day battery life and thin design

As business travellers upgrade from their three year old laptop they're increasingly downsizing to smaller, thinner and lighter notebooks.New Toshiba Notebook from http:http://www.wholesaleeshop.com.au/Laptop
And whenever Australian Business Traveller takes to the skies we take note of what computers are being used in airport lounges and on the plane. There's no doubt that the older mid-sized laptops are making way for slimmer models, especially the 'thin and light' machines which forego a CD/DVD drive.
And we're still seeing a good portion of the littlest laptops known as 'netbooks', which were conceived as a low-cost model for school and uni students but have become a 'second PC' for many users – including an appealing go-anywhere laptop for the small business set.
After all, most of the simplest business tasks you need to do on the road can be done on a netbook – without the physical heft or high price tag of a regular notebook, and with added appeal such as a battery that'll run all day without recharging.
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So while touch-screen tablets and ultra-thin notebooks will continue to be the high-tech travel hits of 2011, netbooks are not about to disappear.
If anything, they're adding features and slicing the price tag. Toshiba's new NB500 series is a case in point.
The base model NB500 sells for an insane $399 but tops out at eight hours of  laptop battery life, with a 10.1 inch screen (making it a bit larger than an iPad's display) and weighing around 1.3kg.
At just $100 more, the $499 NB550 ups the ante with inbuilt Harman/Kardon speakers, a HDMI connector for hooking up to a desktop monitor or a flat-screen TV and the ability to recharge your smartphone via a powered USB socket even when the netbook is in sleep mode with the lid is closed.toshiba laptop computer from http://www.wholesaleeshop.com.au
How to use all that in real life? You've got enough juice to work all the way from Sydney to Singapore, but with a notebook – sorry, 'netbook' – that'll barely make a dent in your carry-on bag. Check into your hotel, plug the NB550 into the powerpoint to charge it up overnight, and at the same time you can give your BlackBerry or iPhone a top-up through the USB port.
If you've downloaded some video, the next night you can hook the NB550 up to your room's LCD TV to watch a movie on the big screen – or just play your favourite music through the peppy little top-firing speakers while you catch up on some reading.
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