The hybrid car is not new – Ferdinand Porsche designed the series-hybrid vehicle in 1898. Called the Lohner-Porsche carriage, the hybrid function served as an electrical transmission rather than power boost. With Mr. Porsche in the driver’s seat, the car broke several Austrian speed records, including the Exelberg Rally in 1901 sony vgp-bps8 battery, sony vgp-bpl8 battery. Another example of an early hybrid was the 1915 Woods Motor Vehicle built in Chicago. The car used a four-cylinder internal combustion engine and an electric motor. Below 15 mph (25 km/h), the electric motor propelled the vehicle; at higher speeds, the gasoline engine kicked in to take the vehicle up to a top speed of 35 mph (55 km/h). As part of the Federal Clean Car Incentive Program, Victor Wouk installed a hybrid drive train in a 1972 GM Buick Skylark but the EPA canceled the program in 1976. Meanwhile, Honda and Toyota have made strong headways by commercializing attractive and fuel-efficient hybrid cars.
The hybrid electric vehicle (HEV) conserves fuel by using an electric motor that assists the internal-combustion engine (IC) on acceleration and harnesses kinetic energy during breaking. Furthermore, the IC motor turns off at stops and during slow travel. When full power is required, both the IC engine and the electric motors engage simultaneously to get maximum boost. This power-sharing scheme offers two advantages; it calls for a smaller IC engine and improves acceleration because the electric motor has excellent torque characteristics SONY Vaio VGN-FZ battery .
Most HEVs use a mechanical drive train from the IC engine to the wheels. In this respect, the HEV is similar to an ordinary vehicle with crankshaft, clutch and transmission, with the difference of having an electric motor and a battery. This design is known as a parallel configuration. Most up-and-coming plug-in HEVs use the serial configuration in which the wheels are powered by one or several electric motors. Instead of a mechanical link, the IC engine energizes a generator to produce electricity for the motor(s). Similar to a laptop or a cell phone, the driver plugs the car into the AC outlet for an overnight charge. The typical driving range with a full charge is 20 miles or 32 km. On long trips, the IC engine engages to provide continuous power for the electric motors.
What’s the best battery for the hybrid car?
The early HEV models used lead acid batteries because there was no alternative. Today, Honda and Toyota employ nickel-metal-hydride (NiMH). This chemistry is lighter and environmentally friendlier than lead-based systems. The battery consists of cylindrical cells that are connected in series to attain several hundred volts. The cell strings are suspended in mid air to allow air-cooling. Figure 1 shows a demonstration pack of an early Toyota hybrid car hp pavilion dv9000 battery
One of the critical battery requirements for hybrid applications is longevity. Rechargeable batteries for consumer products typically last for two to three years. This short service life is no major drawback with cell phones, laptops and digital cameras because the devices get obsolete quickly. At $2,000 to $3,000 per battery pack, the replacement cost of an HEV battery would constitute a major expense.
Most batteries for HEV are guaranteed for eight years. To meet this long service life, the cells are optimized for longevity and not size and weight, as is the case with portable applications. Since the battery runs on wheels, the increased weight and size is not too critical .
A NiMH for an HEV can be charged and discharged 1,000 times if done at an 80% depth-of-discharge. In a hybrid vehicle, a full discharge occurs seldom except if the owner lives on a mountain and requires all available battery power to commute home. Such a routine would add stress to the battery and the life would be shortened. In most other application, the hybrid car only uses 10% of the rated battery capacity. This allows thousands of charge/discharge cycles. Batteries in satellites use a similar system in which the battery discharges less than 10% during a satellite night. NASA achieves this by over-sizing the dell latitude d820 battery.
One of the limitations of NiMH is moderate energy conversion efficiency. This translates to the battery getting hot on charge and discharge. The charge efficiency is best at 50-70% state-of-charge. Above 70% the battery cannot absorb the charge well and much of the charging energy is lost in heat. Operating a battery with a partial charge requires a larger mass that lowers the energy-to-weight ratio and efficiency.
The Japanese car manufacturers have tried several battery chemistries, including going back to lead acid. Today, the focus is on lithium-ion. The cobalt-based lithium-ion is one of the first chemistries in the lithium family and offers a very high energy density. Unfortunately, this battery system cannot deliver high currents and is restricted to portable applications .
HEV manufacturers are experimenting with manganese (spinel) and phosphate versions. These lithium-ion systems offer an extremely low internal resistance, deliver high load currents and accept rapid charge. Unlike the cobalt version, the resistance stays low throughout the life of the battery. To verify the characteristic of manganese-based lithium-ion dell latitude d830 battery, a research lab applied 30,000 discharge/charge cycles over a period of seven years. Although the capacity dropped from 100% to 20%, the cell retained its low internal resistance. The drawback of manganese and phosphate is lower energy density but these systems provide 20% more capacity per weight than NiMH and three times more than lead acid. Figure 2 illustrates the energy densities of the lead, nickel and lithium-ion systems. It should be noted that lithium-ion systems have the potential of higher energy densities but at the cost of lower safety and reduced cycle life.
The Lithium-ion systems are promising candidates for both the HEV and plug-in HEV but require more research. Here are some of the roadblocks that need to be removed:
Durability: The buyer requests a warranty of ten years and more. Currently, the battery manufacturer for hybrid electric vehicles can only give eight years on NiMH. The longevity of lithium-ion has not yet been proven and honoring eight years will be a challenge.
Cost: If the $2,000 to $3,000 replacement cost of a nickel-metal-hydride pack is prohibitive, lithium-ion will be higher. These systems are more expensive to produce than most other chemistries but have the potential for price reductions through improved manufacturing methods. NiMH has reached dell vostro 1710 battery the low cost plateau and cannot be reduced further because of high nickel prices.
Safety: Manganese and phosphate-based lithium-ion batteries are inherently safer than cobalt. Cobalt gets thermally unstable at a moderate temperature of 150°C (300°F). Manganese and phosphate cells can reach 250°C (480°F) before becoming unsafe. In spite of the increased thermal stability, the battery requires expensive protection circuits to supervise the cell voltages and limit the current in fail conditions. The safety circuit will also need to compensate for cell mismatch that occurs naturally with age. The recent reliability problems with lithium-ion batteries in portable devices may delay entry into the HEV market.
Availability: Manufacturers of manganese and phosphate cells can hardly keep up with the demand. A rapid increase of lithium for HEV batteries would put a squeeze on battery production. With 7 kg (15 lb) of lithium per battery, there is talk of raw material shortages. Most of the known supplies of lithium are in South America, Argentina, Chile and Bolivia.
The plug-in hybrid electric vehicle (PHEV)
Imagine a plug-in electric vehicle that can go 20 miles (32 km) with a single charge from the electrical outlet at home. There is no pollution and the neighbors won’t hear you coming and going because the vehicle is totally silent dell inspiron mini 12 battery. With the absence of gas tax, the road system is yours to use for free. Or is it ?
As good as this may sound, the savings will be small or non-existent because of the battery. Dr. Menahem Anderman, a leading expert on advanced automobile batteries, says that we still have no suitable battery for the plug-in HEV and that the reliability of lithium-ion technology for automotive applications has not yet been proven. Unlike the ordinary HEV that operates on shallow charges and discharges, the plug-in HEV is in charge depletion mode that requires deep discharges. To obtain an acceptable driving range, the PHEV battery will need to be five times larger than the HEV battery. With an estimated life span of 1000 full charge and discharge cycles, the battery would need to be replaced every three years. At an estimated $10,000 per battery replacement, the anticipated cost savings would be quickly exhausted.
Modern cars do more than provide transportation; they also include auxiliary devices for safety, comfort and pleasure. The most basic of these auxiliaries are the headlights and windshield wipers. Most buyers would also want heating and air-conditioning systems. These amenities are taken for granted in gasoline-powered vehicles and will need to be used sparingly in a PHEV.
Analysts give another 10 years before a viable plug-in HEV will be available. The promise of a clean-burning fuel cell car is still vivid in our memory (sony vgp-bps9 battery ).
Analysts now estimate 20 years before the fuel cell is ready for mass-produced cars. There are rumors that the fuel cell may never make it into an ordinary car. If this is true, a dream will go down in history with the steam-powered airplane of the mid 1800s that was simply too cumbersome to fly .
The paradox of the hybrid vehicle
At the Advanced Automotive Battery Conference in Hawaii, a delegate member challenged a maker of HEVs with the claim that a German diesel car can get better fuel economy than the hybrid. The presiding speaker, being a trained salesman, flatly denied this notion. There is some truth to his claim, however. On the highway, the diesel car is indeed more fuel-efficient but the HEV has the advantage in city driving. Power boost for fast acceleration and regenerative breaking are advantages that the German diesel does not offer .
Someone then asked, “What would happen if the HEV depletes its batteries while driving up a long mountain pass? Will the car have enough power?” The answer was that the car would make it with the IC engine alone but the maneuverability would be restraint. To compensate for this eventuality, some HEV manufacturers offer SUVs featuring a full-sized IC motor of 250 hp and an electrical motor at 150 hp; 400 hp in total. Such a vehicle would surly find buyers, especially if the government provides grant money for being ‘green.’ It’s unfortunate that the buyers of a small car or the commuters taking public transport won’t qualify for such a handout.
Conclusion
We anticipate that lithium-ion hp pavilion dv7 battery will eventually replace nickel-metal-hydride in hybrid electric vehicles but short service life, high manufacturing costs and safety issues will stand in its way today. We need to remind ourselves that the automotive market can only tolerate a marginal cost increase for a new battery technology. In terms of added capacity, lithium-ion offers only a 20% increase in energy density per weight over nickel-based systems. The nickel-metal-hydride has proven to work well in current HEVs and a new chemistry would need to offer definite advantages over present systems to find buyers. Toyota, Honda and Ford are leading in HEV technology. Other major automakers are expected to offer competitive models by 2010.
Currently, Panasonic EV Energy and Sanyo supply over 90% of the HEV batteries. Both companies are also developing lithium-ion batteries.
While Japan and Korea are focusing on manganese systems, the USA is experimenting with phosphate, the chemistry that made the A123 Systems famous. Europe is relying on clean-burning diesel. These engines are so clean that they won’t even stain a tissue that is placed on the exhaust pipe. BMW is working on a zero emission hydrogen car dell inspiron e1505 battery.
Time will tell who will be the winner in the race for cleaner, more fuel-savvy vehicles and longer-living cars. In terms of longevity, the diesel would be the winner today. We hope that future batteries will one-day have the endurance to match or exceed the robust diesel engine
In the last article, We introduce the way "How to hack dead laptop battery". But as far as we know the hack battery is a dangerous and perplexing work for the professional guy. Most of us only know how to take apart the sony vaio vgn-fz battery pack and solder the cells to the circuit board, this may cause some damage to electrocircuit.
After using for a long time, the laptop battery (A1175) capacity would reduce, resulting in shortened life of the notebook. This is mainly caused by an internal battery batteries aging failure. In serious condition, we cant solve the problem by battery calibration procedures or repeatedly charging and discharging. For this issue, many fans will open the battery case, to find the failure and replace batteries cells, they think that will be able to solve the problem. The actual situation is really so?
Carefully Replace the battery cells
Most laptop battery are made up of lithium-ion batteries cells, and lithium-ion dell studio 1735 battery life is basically a constant, only 500 ~ 800 times charge life. Therefore, if the regular use of batteries for notebook power supply, 1 ~ 2 years later, due to the internal battery aging, it is easy to achieve the life of the batteries expire. Although we have detected in the open cell batteries, the show is a one or two damaged batteries. even if you replace the failure batteries, the battery return back to normal in a short period of time, it can not be used again soon as the entire failure of other batteries.
In that case, replace all the internal laptop battery can solve the problem? In fact, it is difficult to do this. Because in the original battery, its internal batteries is a precise match, and the capacity of batteries, terminal voltage and internal resistance are in a good consistency. And the battery we buy in the market has not been tested and matched, we can not matching for the batteries under the amateur condition, so the capacity, internal resistance and other parameters will inevitably vary. In the internal battery, the batteries are charged together after the series (in the majority of notebook batteries, the batteries will be divided into eight groups, four in series and then parallel to form a battery pack), as a result of the rechargeable battery the same current, in which the smallest capacity batteries will of course be full of electricity, while the other is not enough battery power, the battery terminal voltage can not set the voltage, charging circuit will continue to charge dell vostro 1310 battery pack. In this way, the original fully charged rechargeable batteries will be over-charged.
To reduce the charge time, the current of laptop charging circuit is very big, it will produce great heat when charging, so the liquid batteries temperature and pressure rise, internal electrolyte easily dry or overflow , so the batteries capacity decline and even explose. The total storage capacity of the battery determined by one of the smallest capacity batteries, and this will turn into a vicious cycle, after repeated charge-discharge, the entire battery capacity will significantly decline.
At the same time, a number of laptop batteries in order to prevent unauthorized users to open the replacement of, have the smart chip protection and anti-line openings. As long as the shell to open the battery or batteries from the battery in the circuit board removed, intelligent protection circuit will stop the output of the battery. Even if we put the batteries back to the battery circuit board or close the battery case, the protection of its smart chip still can not be restored. In this way, the battery will not be able to normal output. We need to reset the smart chip in order to solve this problem, but the amateur conditions, we are unable to reset the smart chip. Therefore, from time to time change sony vgp-bps13 batteries cell may cause permanent damage to the battery.
So, how do we solve the battery problem? The best way is to buy a new original battery, but now a new original Thinkpad R50 battery or even a few thousand dollars, to spend so much money is too high, exceeding the carrying capacity of many consumers. However, there are a number of professional notebook repair station, its equipment and technology are good, but there are some repair stations and manufacturers of batteries there is a long-term cooperative relations, the battery can be manufactured to precise matching. This will ensure the maintenance of quality.
In these places the price of batteries for about 300 million, although replacement of batteries on their own to higher prices, but will keep the Thinkpad T41 battery's long-term use. In addition, some maintenance stations for maintenance had also carried out a six-month battery warranty. And we use these six months, as long as there are a hundred times to ensure that the battery charge and discharge around, and battery capacity and stability during this period, then after the battery will enter a stable period, the damage is not easy.
Have know-how to maintain the battery
In any case, replace the batteries do not need our small price to pay, so we have to use in day-to-day attention to the maintenance of the battery to extend battery life.
To protect the battery, first of all to reduce the number of dell xps m2010 battery, that is to say when in the city, do not use the battery as much as possible. This can reduce the number of battery charge and discharge, longer battery life. While this caused some inconvenience to use, but every time you think about the use of batteries, need money to pay two dollars, or you take it easy.
The internal structure of the battery
Battery calibration procedures can extend the attery life, has been a subject of heated discussion. Support the view that correction can eliminate the battery memory effect of batteries to extend battery life. The opponents believe that the use of lithium-ion batteries have no memory effect, so the correction process will only increase the number of battery charge and discharge and shorten battery life. In fact, understanding these two are not comprehensive. Although lithium-ion batteries to reduce the memory effect, but the memory effect still exists.
Indeed the dell vostro 1710 battery calibration can reduce the memory effect, but this is not the most important, the battery calibration procedure is to establish the main functions of the battery and control circuit so that the control circuit can correctly identify the capacity of the battery, so to avoid battery overcharge or over-discharge phenomenon. At the same time, the system can also be exhausted before the battery shutdown to protect data security. However, the frequent use of battery calibration procedures will increase the number of battery charge and discharge. Therefore, we run once every three months about the battery calibration procedures it.
We in the use of batteries for notebook power supply or power adapter for charging the Sony laptop battery, do not unplug the notebook's battery. Because the battery is charging or discharging state, the currents are very large, if we try to plug the battery, then, it is easy to have a spark, not only will cause contact of ablation, may also be caused by the impact of current circuit board or sony vgp-bps9 battery laptop charging circuit damage.
In addition, many people there are still some misunderstanding on the use of batteries. For example, the "new purchase to go through the Apple laptop battery charging and discharging several times to activate," "notebook batteries do need to put a" matter of fact, with the memory effect of lithium batteries and battery to reduce the improvement of internal protection circuits. These factors impact on the battery capacity has been very small, we run on a regular basis as long as the battery calibration procedure of these operations will be able to eliminate the impact of the battery, so we need not care too much for this purpose to wait on your notebook, after all, the dell latitude e6400 battery is used used.
Dictionaries typically define hostels as inexpensive lodging, usually for young travelers. But Hostelworld, a Web site where travelers can book a hostel stay, is trying to change that definition of sony vgp-bps8 battery .As a spokeswoman for Hostelworld.com,IBM Laptop Battery Aisling White has written to dictionaries in the
These days, said White, hostels are moving away from their Spartan roots. They still have communal kitchens and bathrooms. But while dormitory-style sleeping arrangements are typical of vgp bps2a ,vgp bps2c , many hostels offer private rooms as well, sony vgp-bps9 battery, sony vgp-bps13 battery, and some even have private bathrooms with fluffy towels and hair dryers.
“They’re almost akin to a boutique hotel,” said White, speaking from Hostelworld’s headquarters in Dublin.But, he adds, “You are not paying for a five-star hotel and it won’t be one of .”Gradually, though, perceptions are changing. White said inquiries on Hostelworld from
One of the main reasons travelers choose hostels is the price. They typically charge a fraction of what other types of lodging cost. As Jim Williams writes in his “Hostelling Handbook,” “The reality is this: suppose you have $5,000 and a lot of time ¡ª you have taken a year off school and worked for a while and are taking some time to travel for sony vaio vgn-fz battery . You could spend this amount in a few weeks at expensive hotels and restaurants OR you could stretch this money and travel for perhaps two years, This is where modern hostelling fits in.”
Hostelling is a venerable tradition in Europe, Asia, and
The more than 450
Hostels also tend to be sociable places. The young Australians, New Zealanders and others who travel for several months or even years at a time use hostels as a place to find jobs, make friends and learn about the area of . “I don’t think you’ll ever be lonely in a hostel,” said White.White is trying to spread the word that hostels are fine places for families and older travelers. In a survey completed in January, Hostelworld.com found that 36 percent of hostel customers were 18-24 years old; 42 percent were ages 25-34,dell latitude e6400 battery , and 9 percent were 35-44. Thirteen percent were over 45.
Online hostel booking sites abound. Hostelworld.com is one of the largest, with 1.6 million visitors a month, according to the research firm comScore. Other top hostel-booking sites of, according to comScore, include HostelBookers.com, which advertises no booking fees; HostelsClub.com, which requires a $2.50 fee for each booking and a nonrefundable 10 percent deposit in advance; and Hostels.com, which has a $2 booking fee and 10 percent nonrefundable deposit. Hostelworld charges a $2 fee, but after you make three bookings, you don’t have to pay fees again.
The Hostelworld.com site includes suggested itineraries, mini-tour guides to 60 places around the world, and an iPhone application to make it easier to find and book a hostel room of sony vgp-bpl8 battery while you’re on the go.Hostelworld.com’s top U.S. hostel was USA Hostels San Diego, which charges $57 for a private room with twin beds.
“Apart from this place being slightly out of the way the only issue was there was a rat living in the roof right above my bunk gnawing through the wall all night long for sony vgp bps2c battery ,” wrote a reviewer named Sean on Jan, 18 of the St. Christopher’s Inn in
Hostelworld.com carries thousands of user ratings, and uses guest ratings to honor the best hostels worldwide each year., This year, five of the top 10 were located in
Williams recommends using hostel booking sites to find a place, and then doing the booking itself directly with the hostel management of hp Compaq nc6120 battery . That way, a family looking for a four-person hostel room can ask the staff if theirs is a party place with a nightly pub crawl, or something more peaceful.