Traditional software-controlled battery management systems

June 24 [Mon], 2013, 11:48
When it comes to rapid advances in technology, we don't have a whole lot to gripe about as a society. We've got computers in ou Pavilion g7 high quality r pockets, broadband-class speeds without wires, and more pixels on our displays than we can even count. But on the battery side, there's a lot of room for improvement.

Texas Instruments realizes it, and this week introduced two power management chipsets with TI's patented new MaxLife fast-charge technology, which allows consumers to charge single-cell Li-Ion batteries faster and experience longer battery life. The bq27530 and bq27531 fuel gauge circuits, coupled with TI's bq2416x and bq2419x chargers, optimize battery performance using the highest possible charge rates with minimal battery degradation.

TI's MaxLife technology leverages a degradation modeling system to minimize charge time while extending battery service life – as much as 30 percent according to lab tests. Based on TI's popular Impedance Track battery capacity measurement technology, the MaxLife algorithm accurately predicts and avoids charge conditions that could degrade the battery.

Traditional software-controlled battery management systems – whether implemented with a microcontroller, PMIC (power management integrated circuit) or digital signal processor – are limited in their ability to predict accurate battery capacity and translate that information into run time. The new bq27530 and bq24160 chipset for 2.5-A charge rates and the bq27531 and bq24192 chipset for 4.5-A charge rates give designers greater flexibility by having the gauge control the charger directly.

This autonomous battery management system reduces software overhead, improves battery safety and security, provides better thermal management and allows a designer to adapt the charging algorithm to support 516916-001 high quality different platforms and newer higher capacity batteries.

Before we get too excited, it's important to remember that these types of battery advancements have been trotted out before, but a lot of it seems to fade away after hitting the drawing board. Hopefully we'll soon see some meaningful boosts, though.

This project represents a synergy between basic science

June 24 [Mon], 2013, 11:46
Scientists have been excited about the potential of lithium-sulfur batteries for decades, but long-lasting, large-scale versions for commercial applications have proven elusive. Researchers were stuck with a catch-22 created by the 497695-001 high quality use of liquid electrolytes: On one hand, the liquid helped conduct ions through the battery by allowing lithium polysulfide compounds to dissolve. The downside, however, was that the same dissolution process caused the battery to prematurely break down.

The ORNL team overcame these barriers by first synthesizing a never-before-seen class of sulfur-rich materials that conduct ions as well as the lithium metal oxides conventionally used in the battery’s cathode. Liang’s team then combined the new sulfur-rich cathode and a lithium anode with a solid electrolyte material, also developed at ORNL, to create an energy-dense, all-solid battery.

“This game-changing shift from liquid to solid electrolytes eliminates the problem of sulfur dissolution and enables us to deliver on the promise of lithium-sulfur batteries,” Liang said. “Our battery design has real potential to reduce cost, increase energy density and improve safety compared with existing lithium-ion technologies.”

The new ionically-conductive cathode enabled the ORNL battery to maintain a capacity of 1200 milliamp-hours (mAh) per gram after 300 charge-discharge cycles at 60 degrees Celsius. For comparison, a traditional lithium-ion battery cathode has an average capacity between 140-170 mAh/g. Because lithium-sulfur batteries deliver about half the voltage of lithium-ion versions, this eight-fold increase in capacity demonstrated in the ORNL battery cathode translates into four times the gravimetric energy density of lithium-ion technologies, explained Liang.

The team’s all-solid design also increases battery safety by eliminating flammable liquid electrolytes that can react with lithium metal. Chief among the ORNL battery’s other advantages is its use of elemental sulfur, a plentiful industrial byproduct of petroleum processing.

“Sulfur is practically free,” Liang said. “Not only does sulfur store much more energy than the transition metal compounds used in lithium-ion battery cathodes, but a lithium-sulfur device could help recycle a waste product into a useful technology.”

Although the team’s new Pavilion g4 high quality is still in the demonstration stage, Liang and his colleagues hope to see their research move quickly from the laboratory into commercial applications. A patent on the team’s design is pending.

“This project represents a synergy between basic science and applied research,” Liang said. “We used fundamental research to understand a scientific phenomenon, identified the problem and then created the right material to solve that problem, which led to the success of a device with real-world applications.”

Information displayed remains on the screen without the need for a battery

May 04 [Sat], 2013, 11:00
Toppan Printing Co., Ltd. (hereafter Toppan Printing; head office: Chiyoda Ward, Tokyo; President & Representative Director: Shingo Kaneko) has developed an RFID (*1) device that is compliant with the ISO/IEC15693 (*2) communication standard and can display information on an IC chip in text and images without 511884-001 cheap the need for a battery.

Sample shipments are scheduled to begin in spring 2013 with use envisaged for applications where text and images such as QR codes on an IC chip need to be displayed for confirmation, such as management of processes or status in factories and hospitals.

This is an RFID device that has a 2.7 inch dot-matrix (*3) electronic paper display and enables the display to be changed without the use of a battery. A battery is not required because information can be read, written and displayed using only the power supply from the reader/writer. Since electronic paper is used for the display section, information displayed remains on the screen without the need for a battery.

The method of communication is compliant with ISO/IEC 15693, which is widely used in the field of RFID. Due to the use of a low-power consumption circuit developed by Toppan, it has become possible to operate this 504610-001 cheapdevice with general reader/writers even though the display is a dot-matrix type, which consumes a lot of power.

This product will be displayed in the Toppan booths at CARTES 2012, which will be held from November 6 to 8, 2012 in Paris, France, and at Messe Nagoya 2012, which will be held from November 7 to 10, 2012 at the Port Messe Nagoya exhibition center in Nagoya, Japan.

The research is also good news for battery developers

May 04 [Sat], 2013, 10:56
Researchers from North Carolina State University have developed a new technique that allows users to better determine the amount of charge remaining in a battery in real time. That’s good news for electric vehicle drivers, since it G42 cheapgives them a better idea of when their car may run out of juice.

The research is also good news for battery developers. “This improved accuracy will also give us additional insight into the dynamics of the battery, which we can use to develop techniques that will lead to more efficient battery management,” says Dr. Mo-Yuen Chow, a professor of electrical and computer engineering at NC State and co-author of the paper. “This will not only extend the life of the charge in the battery, but extend the functional life of the battery itself.”

At present, it is difficult to determine how much charge a battery has left. Existing computer models for estimating the remaining charge are not very accurate. The inaccuracy stems, in part, from the number of variables that must be plugged in to the models. For example, the capacity of a battery to hold a charge declines with use, so a battery’s history is a factor. Other factors include temperature and the rate at which a battery is charged, among many others.

Existing models only allow data on these variables to be plugged in to the model once. Because these variables – such as temperature – are constantly changing, the models can become increasingly inaccurate.

But now researchers have developed software that identifies and processes data that can be used to update the computer model in real time, allowing the model to estimate the remaining charge in a battery much more accurately. While the technique was developed specifically for batteries in plug-in electric vehicles, the approach is also applicable to battery use in any other application.

Using the new technique, models are able to estimate remaining charge within 5 percent. In other words, if a model using the new technique estimates a battery’s state of charge at 48 percent, the real state of charge 511872-001 cheapwould be between 43 and 53 percent (5 percent above or below the estimate).

The paper, “Adaptive Parameter Identification and State-of-Charge Estimation of Lithium-Ion Batteries,” will be presented at the 38th Annual Conference of the IEEE Industrial Electronics Society in Montreal, Oct. 25-28. Lead author of the paper is Habiballah Rahimi-Eichi, a Ph.D. student at NC State. The research was supported by the National Science Foundation, in collaboration with the foundation’s Engineering Research Center for Future Renewable Electric Energy Delivery and Management, which is based at NC State.

Re-calibrate your battery every month or so by fully charging

March 14 [Thu], 2013, 11:16
It is difficult to predict how long a laptop battery charge will last because each computer user has different habits and needs. The rate at which you use laptop battery power will determine how long you can use the buy Studio 1537 of your laptop. You can re-calibrate your laptop battery if the battery's life has gotten shorter over time. Your laptop battery might need a good calibration if it doesn't seem to be getting the mileage that it should. How to re-calibrate laptop battery? The following paragraphs will give you the answer.

First put the laptop computer to sleep by turning off the screensaver and other power management settings of the computer. Then fully charge the computer and allow it to run all the way down until the computer shuts off automatically. Once the laptop battery has fully drained, charge it back up again and restore the screensaver and power management settings.

Re-calibrate your battery every month or so by fully charging, fully discharging, and then fully charging again. Basically to have a chance to re-calibrate your laptop battery is to turn off all power-saving features completely and then fully recharge them. If it doesn't work for the first time then try two more full discharges and recharges.

The above way of re-calibrating the laptop batteries works well with laptops using Ni-MH cells. But not with laptops using Li-Ion batteries because deep discharges will actually decrease the charge capacity and lifespan of Li-Ion cells. Moreover Li-ion batteries irreversibly lose approximately 20% capacity per year from the time of manufacture at a typical 100% charge level at 25deg.C, even when unused. Li-ion batteries irreversibly lose approximately 2%, 4%, 15% at 0deg.C, 25deg.C and 40deg.C respectively, when stored at 40% charge level. That is every deep discharge cycle decreases the capacity of the Li-ion batteries.

As the Li-Ion batteries are chemical in nature, charging and recharging is not going to fix the problem once the chemical reactions stop happening. Therefore the best advice for re-calibrating the Li-Ion batteries is to store the battery at 40% charge if it kept unused for any unlimited period of time. Also don't leave the battery in the laptop if you don’t use the battery or if you plug the laptop into outlet power.

You can also re-calibrate your laptop battery using IBM Thinkpad Battery Maximizer in order to maximize your laptop battery’s life. If your laptop has IBM ThinkPad Battery MaxiMiser and Power Management features installed, you can verify the condition of the laptop battery. You can check the status of your battery using the Battery MaxiMiser Gauge in the taskbar tray. The ThinkPad's Lithium Ion battery pack that seems to be an intelligent battery uses a microprocessor to monitor its capacity. Then the microprocessor of the battery pack passes the information about the remaining battery capacity to the laptop. The laptop indicates the capacity with high accuracy.

Using the HP Laptop Battery Learning Utility, a modified version of a Win98 boot floppy, can also help you. Just place it in the floppy drive, and then turn on the computer. The re-calibration process is automated and takes aboutbuy dell Studio 1737 six hours to finish. This utility is available in different versions for different models. You can run the utility every two months.

If the laptop battery is still bad then it must have developed a memory that cannot be erased easily. If calibration doesn't help, then it is the right time to purchase another battery.

Adding additional RAM will assist by saving battery power

March 14 [Thu], 2013, 11:11
Many laptop computer users don't realise that is quiet easy to increase battery running time via a couple of minor tweeks. Try to implement buy Inspiron N5010as many of the following ideas as possible to extend the battery lifetime of your laptop.

The biggest power saving could be quickly made by going to Windows Power Options usually found in the Control Panel. Set it to maximum energy saving. This is simple to do and may save plenty of power.

Just decreasing the brightness of the laptop screen will save a lot of battery power. So using the laptop in a darkened room at minimal brightness is certain to save extra power.

Often users have many unnecessary, maybe ineffective applications running in the background. These will waste power and slow down the laptop. It is generally tough to identify and remove them so a cleaner program may be required for this.

Use hibernate when turning off the laptop computer as it uses nearly no power in this mode and can quickly power up when required. Standby and shutdown ought to be avoided as both will use extra energy from the battery when off or entering Windows.

Adding additional RAM will assist by saving battery power. This can allow packages to run mostly from the RAM rather than from the hard drive. Additionally, almost all packages will run quicker and smoother.

If you have a WI-FI card enabled then power will likely be drained from the battery even if the laptop computer is not connected to the Web. Often it can easily be turned off via a switch or software program to save this power being wasted during battery operation.

The hard drive uses more power than RAM however makes use of significantly less than the CD or DVD drive. So attempt to install packages and data in order that they run from the hard drive rather than the CD or DVD drive. When installing a program it's often possible to instruct it to install all of the code on the hard drive so access to the CD or DVD drive is not required.

If sound is not actually necessary then muting the sound or significantly reducing the volume of the laptop audio system can reduce energy consumption. Typically users have music playing whilst operating their laptop, this is okay on mains, but on battery will in a short time discharge it.

If you hear the fan operating frequently or the entire time then battery energy is being wasted trying to cool an overheating laptop. The vent may be blocked or if you are using it on your knees you may be stopping air flow. In either case additional battery energy will be wasted and the laptop may finally be broken by the surplus heat.

Unfortunately, every battery will provide less and less charge the more times it's used and charged and discharged. Care should be taken to try and extend the battery life so long as is possible. Do not let the buy Latitude E6500 become hot as this can shorten its life. Do not leave on charge for long periods as soon as fully charged. Attempt to almost fully discharge the battery before recharging.

There are many other components that affects the power drain from your laptop's battery, however the major causes of depletion have been considered. A battery will never be as good as the mains supply in operating your laptop computer however there's no other alternative if you are on the move.

AGM batteries are less prone to this

December 13 [Thu], 2012, 15:27
AGM technology was developed in 1985 for military aircraft to reduce weight, increase power handling and improve reliability. The acid is absorbed by a very fine fiberglass mat, making the battery spill-proof. This enables shipment without hazardous material restrictions. The plates can be made flat to resemble a standard9 cell U160 flooded lead acid pack in a rectangular case; they can also be wound into a cylindrical cell.

AGM has very low internal resistance, is capable to deliver high currents on demand and offers a relatively long service life, even when deep-cycled. AGM is maintenance free, provides good electrical reliability and is lighter than the flooded lead acid type. It stands up well to low temperatures and has a low self-discharge. The leading advantages are a charge that is up to five times faster than the flooded version, and the ability to deep cycle. AGM offers a depth-of-discharge of 80 percent; the flooded, on the other hand, is specified at 50 percent DoD to attain the same cycle life. The negatives are slightly lower specific energy and higher manufacturing costs that the flooded. AGM has a sweet spot in midsize packs from 30 to 100Ah and is less suitable for large UPS system.

AGM batteries are commonly built to size and are found in high-end vehicles to run power-hungry accessories such as heated seats, steering wheels, mirrors and windshields. NASCAR and other auto racing leagues choose AGM products because they are vibration resistant. AGM is the preferred battery for upscale motorcycles. Being sealed, AGM reduces acid spilling in an accident, lowers the weight for the same performance and allows installation at odd angles. Because of good performance at cold temperatures, AGM batteries are also used for marine, motor home and robotic applications.

Ever since Cadillac introduced the electric starter motor in 1912, lead acid became the natural choice to crank the engine. The classic flooded type is, however, not robust enough for the start-stop function and most batteries in a micro-hybrid car are AGM. Repeated cycling of a regular flooded type causes a sharp capacity fade after two years of use. See Heat, Loading and Battery Life.

As with all gelled and sealed units, AGM batteries are sensitive to overcharging. These batteries can be charged to 2.40V/cell (and higher) without problem; however, the float charge should be reduced to between 2.25 and 2.30V/cell (summer temperatures may require lower voltages). Automotive charging systems for flooded lead acid often have a fixed float voltage setting of 14.40V (2.40V/cell), and a direct replacement with a sealed unit could spell trouble by exposing the battery to undue Notebook U330 batteriesovercharge on a long drive. See Charging Lead Acid.

AGM and other sealed batteries do not like heat and should be installed away from the engine compartment. Manufacturers recommend halting charge if the battery core reaches 49°C (120°F). While regular lead acid batteries need a topping charge every six months to prevent the buildup of sulfation, AGM batteries are less prone to this and can sit in storage for longer before a charge becomes necessary. Table 1 spells out the advantages and limitations of AGM.

Battery World is Australia’s largest and most comprehensive retail battery

December 13 [Thu], 2012, 15:15
In a bid to preserve the environment, Battery World has launched a recycling program to encourage the community to stop throwingOEM 43R9257 laptop battery out this hazardous waste in the normal garbage.

A recent Australian Bureau of Statistics report stated that batteries were the most common form of hazardous waste disposed of in Australian households and that 97 per cent disposed of batteries via their usual rubbish collection.

Battery World National Marketing Manager, Nick Vincent said as society became more dependent on portable power, batteries were an increasing environmental problem and a long-term plan was needed to limit the amount of battery waste entering landfill.

"The chemicals in batteries are toxic and can contaminate soil and harm wildlife so we don't want them going into landfill," Mr Vincent said.

"Most batteries can be recycled so we urge the community to be responsible and bring their used batteries to one of our 85 stores so they can be disposed of safely.”

“As we begin to expand, Battery World is playing a great part in educating Australia about the hazardous affects batteries have on our environment.”

Battery World provides this service to consumers free of charge and sorts all batteries collected in the bins, to ensure they go to the correct recycling plants.

As part of educating the community 6 cell U150World are already rolling out a school’s recycling program in some states which will give children the opportunity to recycle batteries at school and learn about the importance of recycling.

Battery World is Australia’s largest and most comprehensive retail battery chain which has access to more than 8’000 batteries and accessories. Along with many other items, Battery World can power a range of household, industrial, recreational, marine, technical and cosmetic items and is the most convenient place for customers to obtain all their portable needs.

What we need to check when choosing a suitable laptop battery replacement

October 23 [Tue], 2012, 16:09
The reasons for users to look for the new replacement or backup Acer laptop batteries
Actually, the reasons for a new replacement are relevant to many factors, such as damage, poor work conditions, shorter life time or need an upgraded version. If you haven’t heard of the knowledge of lithium-ion 12 cells Pavilion g7 battery the only way is checking if you can play on your Acer laptop smoothly all the time. All in all, you’ll figure out if there’s something needed to update or solve.

What we need to check when choosing a suitable laptop battery replacement
Whether determined or not, the terminal users will look of if there’s suitable brand new Acer laptop battery for our certain laptop model and check if certain problem can be dealt with perfectly. Other than requirements, we need to learn clearly about the properties of the new battery in compatibility, interface, control circuits, cells quantity, size, running rate and so on.

What we can do to check the real work situations and the influence on these lithium-ion batteries

After checking, the testing and activating on real compatible Acer laptop models are the important last step to see if the replacement batteries can be adapted to the new work situations well. After all, the lithium-ion batteries have also got great influence on other parts like internal memory rate. Of course, the other influence factors outside like desk and inside temperature will also be related to thern873 516916-001actual performance.

As for a backup battery, what we should do towards it if not in use
If this Acer laptop battery replacement is just a backup, it should be stored well after putting into a cool and dry box. Even if it is not necessary, please plug it into the laptop computer at least once a month by fully charging.

The battery requires periodic calibration

October 23 [Tue], 2012, 16:07
Misunderstanding one: notebook computer to buy back the need to repeatedly charge and discharge three times in order to activate the battery.

Unless you buy a notebook computer products in stock for more than one year, otherwise it need not do so, because now the battery cell when the factory had already been activated, and the batteries in the package Acer notebook battery after another equivalent to activate the test, so you get the 497695-001 laptop batteryof the hand, has long been activated, do the three charge-discharge process is unnecessary to increase the cell loss.

Myth: The first charge must be sufficient enough for 12 hours
Is applicable for early battery control circuit Ni-MH battery models, but for Acer laptop battery with the intelligent charge and discharge control circuit is a joke, when the notebook computer battery is fully charging current is automatically cut off, even if you continue to charge 120 hours, the state would not be any changes, in general, even if the charge of the slowest machine, six hours completely filled, the remaining "charge" is just a waste of their time. Instead, get a new machine should first power shine recharge.

Myth: The battery requires periodic calibration, complete charge and discharge once a month.
A strong memory effect of Ni-MH battery, which is an essential task, but for the lithium battery, this cycle is too frequent, lithium although not completely eliminate the memory effect, but has greatly reduced the memory effect, if you use the battery frequently, then you should discharge the battery to the relatively low (approximately 10 ~ 15%) recharge, but if the discharge to the connected machines are open (0-1%), belongs to the depth of discharge lithium batteries have a greater damage Generally every two months to do once the operation on it. If you rarely use the battery, then every three months once this operation.
Myth: correction can improve the battery capacity

Correction, when the record capacity is not the same as the actual capacity of the battery and control circuit, the battery is a deep charge-discharge operation, the control circuit record, closer to the actual situation of the battery, which is a performance of the battery real capacity the operation rather than the capacity to enhance the driving factor here is the actual capacity of the battery if the battery's actual capacity is higher than the capacity of the control circuit in the record, correction can make the battery looks like the increased capacity, if the actual capacity of the battery control circuit record capacity, then the correction will make the battery seems to reduce capacity, which is the reason many people debating the correction effect, pleasebattery for Pavilion g4 remember that the correction is that the real capacity of the battery presented to eliminate the battery and control circuit bias, as to show the capacity will increase or decrease, which is the state of the battery itself, rather than your correction.

Likely to battery capacity but significantly decreased because of a correction when the depth of discharge damage.