Automakers want to ensure that no driver gets stuck in traffic  

2013年06月17日(月) 12時55分
The Volkswagen Beetle in simpler days had minimal battery problems. The only management system was ensuring that the Aspire 3935 replacementwas being charged while driving. Onboard electronics for safety, convenience, comfort and pleasure have greatly added to the demands on the battery in modern cars since then.

For the accessories to function reliably, the state-of-charge of the battery must be known at all times. This is especially critical with start-stop technologies, a mandated requirement on new European cars to improve fuel economy.
When the engine stops at a red light, the battery draws 25–50 amperes of current to feed the lights, ventilators, windshield wipers and other accessories. When the light changes, the battery must have enough charge to crank the engine, which requires an additional 350A. With the engine started again and accelerating to the posted speed limit, the battery begins charging after a 10-second delay.

Realizing the importance of battery monitoring, car manufacturers have added battery sensors that measure voltage, current and temperature. Packaged in a small housing that forms part of the positive clamp, the electronic battery monitor(EBM)provides useful information about the battery and provides an accuracy of about +/–15 percent when the battery is new. As the battery ages, the EBM begins drifting and the accuracy drops to 20-30 percent. The model used for monitoring the battery is simply not able to adjust. To solve this problem, EBM would need to know the state-of-health of the battery, and that includes the all-important capacity. No method exists today that is fully satisfactory, and some mechanics disconnect the battery management system to stop the false warning messages.

A typical start-stop vehicle goes through about 2,000 micro cycles per year. Test data obtained from automakers and the Cadex laboratories indicate that with normal usage in a start-stop configuration, the battery capacity drops to approximately 60 percent in two years. Field use reveals that the standard flooded lead acid lacks robustness, and carmakers are reverting to a modified version lead acid battery. Read about Environmental Concerns.

Automakers want to ensure that no driver gets stuck in traffic with a dead battery. To conserve energy, modern cars automatically turn off unnecessary accessories when the battery is low and the motor stays running at a stoplight. Even with this measure, state-of-charge can remain low if commuting in gridlock conditions because motor idling does not provide much charge to the battery, and with essential accessories like lights and windshield wipers on, the net effect could be a small discharge.

Battery monitoring is also important on hybrid vehicles to optimize charge levels. Intelligent charge management prevents stressful overcharge and avoids deep discharges. When the charge level is low, the internal combustion (IC) engine engages earlier than normal and is left running longer for additional charge. On a fully charged battery, the IC engine turns off and the car moves on the electrical motor in slow traffic.

Improved battery management is of special interest to the manufacturers of the electric vehicle. In terms of state-of-charge, a discerning driver expects similar accuracies in energy reserve as are possible with a fuel-powered Aspire 4810T replacement vehicle, and current technologies do not yet allow this. Furthermore, the driver of an EV anticipates a fully charged battery will power the vehicle for the same distance as the car ages. This is not the case and the drivable distance will get shorter with each passing year. Distances will also be shorter when driving in cold temperatures because of reduced battery performance.

Over-expectation with monitoring methods is common 

2013年06月17日(月) 12時54分
One of the most urgent requirements for battery-powered devices is the development of a reliable and economical way to monitor battery state-of-function (SoF). This is a demanding task when considering that there is still no dependable method to read state-of-charge, the most basic characteristic of a battery. Even if SoC were displayed accurately, charge information alone has limited benefits without knowing the capacity. The objective is to identify battery readiness, which describes what the Aspire 3810T replacementcan deliver at a given moment. SoF includes capacity (the amount of energy the battery can hold), internal resistance (the delivery of power), and state-of-charge (the amount of energy the battery holds at that moment).

Stationary batteries were among the first to include monitoring systems, and the most common form of supervision is voltage measurement of individual cells. Some systems also include cell temperature and current measurement. Knowing the voltage drop of each cell at a given load reveals cell resistance. Cell failure caused by rising resistance through plate separation, corrosion and other malfunctions can thus be identified. Battery monitoring also serves in medical, defense and communication devices, as well as wheeled mobility and electric vehicle applications.

In many ways, present battery monitoring falls short of meeting the basic requirements. Besides assuring readiness, batterymonitoring should also keep track of aging and offer end-of-life predictions so that the user knows when to replace a fading battery. This is currently not being done in a satisfactory manner. Most monitoring systems are tailored for new batteries and adjust poorly to aging ones. As a result, battery management systems (BMS) tend to lose accuracy gradually until the information obtained gets so far off that it becomes a nuisance. This is not an oversight by the manufacturers; engineers know about this shortcoming. The problem lies in technology, or lack thereof.

Another limitation of current monitoring systems is the bandwidth in which battery conditions can be read. Most systems only reveal anomalies once the battery performance has dropped below 70 percent and the performance is being affected. Assessment in the all-important 80–100 percent operating range is currently impossible, and systems give the batteries a good bill of health. This complicates end-of-life predictions, and the user needs to wait until the battery has sufficiently deteriorated to make an assessment. Measuring a battery once the performance has dropped or the battery has died is ineffective, and this complicates battery exchange systems proposed for the electric vehicle market. One maker of a battery tester proudly states in a brochure that their instrument “Detects any faulty battery.” So, eventually, does the user.

Some medical devices use date stamp or cycle count to determine the end of service life of a battery. This does not work well either, because batteries that are used little are not exposed to the same stresses as those in daily operation. To reduce the risk of failure, authorities may mandate an earlier replacement of all batteries. This causes the replacement of many packs that are still in good working condition. Old habits are hard to break, and it is often easier to leave the procedure as written rather than to revolt. This satisfies the battery vendor but increases operating costs and Aspire 3820T replacementcreates environmental burdens.

Portable devices such as laptops use coulomb counting that keeps track of the in- and out flowing currents. Such a monitoring device should be flawless, but as mentioned earlier, the method is not ideal either. Internal losses and inaccuracies in capturing current flow add to an unwanted error that must be corrected with periodic calibrations.

Over-expectation with monitoring methods is common, and the user is stunned when suddenly stranded without battery power. Let’s look at how current systems work and examine up-and-coming technologies that may change the way batteries are monitored.

An addition problem with the SMBus battery is non-compliance 

2013年05月02日(木) 14時35分
The 'smart' battery has some notable downsides, one of which is price. An SMBus battery costs about 25% more than the 'dumb' equivalent. In addition, the 'smart' battery was intended to simplify the charger but a full-fledged Level 3 charger costs substantially more than a regular model. T112C brand new

A more serious drawback is the requirements for periodic calibration or capacity re-learning. The Engineering Manager of Moli Energy, a manufacturer of lithium-ion cell commented, "With lithium-ion we have eliminated the memory effect; but is the SMBus battery introducing digital memory?"

Why is calibration needed? The calibration corrects the tracking errors that occur between the battery and the digital sensing circuit while charging and discharging. The most ideal battery application, as far as fuel-gauge accuracy is concerned, would be a full charge followed by a full discharge at a constant current. In such a case, the tracking error would be less than 1% per cycle. In real life, however, a battery may be discharged for only a few minutes and the load pulses may be very short. Long storage also contributes to errors because the circuit cannot accurately compensate for self-discharge. Eventually, the true capacity of the battery no longer synchronizes with the fuel gauge and a full charge and discharge is needed to 're-learn' the battery.

How often is calibration needed? The answer lies in the battery application. For practical purposes, a calibration is recommended once every three months or after every 40 short cycles. Many batteries undergo periodic full discharges as part of regular use. If the portable device allows a deep enough discharge to reset the battery and this is done regularly, no additional calibration is needed. However, if no discharge reset has occurred for a few months, a deliberate full discharge is needed. This can be done on a charger with discharge function or a battery analyzer.

What happens if the battery is not calibrated regularly? Can such a battery be used in confidence? Most 'smart' battery chargers obey the dictates of the chemical cells rather than the electronic circuit. In this case, the envy T117C brand newwill fully charge regardless of the fuel gauge setting and function normally, but the digital readout will become inaccurate. If not corrected, the fuel gauge simply becomes a nuisance.

An addition problem with the SMBus battery is non-compliance. Unlike other tightly regulated standards, the SMBus protocol allows some variations. This may cause problems with existing chargers and the SMBus battery should be checked for compatibility before use. The need to test and approve the marriage between a specific battery and charger is unfortunate, given the assurance that the SMBus battery is intended to be universal. Ironically, the more features offered on the SMBus charger and the battery, the higher the likelihood of incompatibilities.

To the two-wire system to the System Management  

2013年05月02日(木) 14時34分
The battery has the inherit problem of not being able to communicate with the user. Neither weight, color, nor size provides an indication of the inspiron-1720 brand new state-of-charge (SoC) and state-of-health (SoH). The user is at the mercy of the battery.

Help is at hand in breaking the code of silence. An increasing number of today's rechargeable batteries are made 'smart'. Equipped with a microchip, these batteries are able to communicate with the charger and user alike. Typical applications for 'smart' batteries are notebook computers and video cameras. Increasingly, these batteries are also used in biomedical devices and defense applications.

There are several types of 'smart' batteries, each offering different complexities and costs. The most basic 'smart' battery may contain nothing more than a chip that sets the charger to the correct charge algorithm. In the eyes of the Smart Studio 1535 brand newSystem (SBS) forum, these batteries cannot be called 'smart'.

What then makes a battery 'smart'? Definitions still vary among organizations and manufacturers. The SBS forum states that a 'smart' battery must be able to provide SoC indications. In 1990, Benchmarq was the first company to commercialize the concept by offering fuel gauge technology. Today, several manufacturers produce such chips. They range from the single wire system, to the two-wire system to the System Management Bus (SMBus). Let's first look at the single wire system.

The unique structure of the battery 

2013年03月19日(火) 10時50分
The policy is a double-edged sword, properly managed real-time opportunity, but at the same time, will bring many of the restrictions and inconvenience, especially reflected in the battery industry. New energy up to the hottest in recent years, for example, limit the number of first-tier cities on the road to the newreplacement probook 4510s battery energy vehicles are big and bright "green light" north and wide car, but the growing importance of new energy vehicles, but also allowed the upstream industry to usher in a huge challenge.

In this regard, the AMD Power Group, said: continuous improvement of technological innovation, break through the technical bottleneck in order to have a share in the rapid development of new energy boom carve.

In recent years, with the market competition of domestic electric bikes, as the core components of the electric vehicle lead-acid battery power due to the same phenomenon is becoming increasingly serious, has not meet the market demand of high-end brand of electric car manufacturers and first-line dealer.

AMD Power Group, through market research, proposed the elimination of the homogenization, to find the differences in R & D strategy. In this strategy, driven by the AMD battery the introduction of a series of high-tech and large capital investment, which developed a series of new energy batteries, which have received the unanimous endorsement of the industry.

AMD battery 6-DZM-12

It is understood that, within Anhui Chao Wei, Jiang Su Chaowei, Zhejiang Jiangchao Wei, Shandong AMD R & D, low calcium alloy of growth of the power of life colloid "Jin Chaowei" battery, completely subverts the traditional lead-acid battery in the structural design The design concept uses a combination of our own patented technology and precision manufacturing.

The unique structure of the battery, the battery terminals to ensure zero leakage, are unlikely to cause rupture of the battery casing, complete elimination of the internal battery corrosion of the connecting devices and circuit problems, the consistency of the battery the unprecedented increase in the installation. The same time, in the case of the battery appearance of constant volume, electrode size and specific surface area re-optimized, so that the battery capacity increased by 10%. To further improve the battery life, the company R & D personnel using special additives, slowed by changing the density of the electrolyte, electrode corrosion rate, more than 20% longer life than ordinary batteries. In addition, the battery safety valve relief foolproof design, and more secure than ordinary batteries, to ensure that the case does not occur in the course of burst, eliminating the security risks.

It is in the technological breakthroughs, "Jinchao Wei" battery with conventional batteries can not match the structure of the new, large capacity, long life, security and many other advantages. AMD battery for high-end electric bikes market, in order to promote the integration of domestic high-end electric bikes market brand. Not only that, it also laid the technical foundation for AMD future more high-end powerreplacement Pavilion g50 batteryresearch and development.

A certain industry experts say, AMD Power Group has maintained a lead in the field of new energy battery, "Jin Chaowei battery research and development to further consolidate its position, while for the new energy power battery technology upgrades and bring new ideas to help the development of the industry as a whole.

The conductive part of the battery is composed of conductive  

2013年03月19日(火) 10時47分
Singapore's Nanyang Technological University, Institute of Energy scientists have recently developed a new type of solar cells, called dye-sensitized solar cells. Previous production of solar cells based on silicon as the main replacement 516355-001 raw material, and this invention of a new type of solar cell is to be inspired by plant photosynthesis, with reference to chlorophyll light atom conversion into energy principle, the use of relatively stable artificial dyes to capture the spectrum almost all visible light.

The conductive part of the battery is composed of conductive electrolyte and ruthenium derivatives of the dye by nano-scale titanium dioxide particles and help. Compared with traditional silicon solar cells, this new type of solar cell can absorb direct sunlight and diffuse light source (such as indoor lighting, etc.).

Titanium dioxide is usually used in paints, sunscreen and food coloring, low cost and suitable for mass production. The conductive layer can be coated with glass or plastic sheets, lightweight and toughness and can be double-sided light absorption.

According to reports, the new solar cell is still in the experimental stage of a small area, the main difficulty is to find a suitable polymer, because it not only to integration with the titanium dioxide and dyes, but also has better light transmission. The experts say this new battery eventually enter the market, not only conductive coating can be applied in the clothes, but also painted in the architectural glass replacement 607763-001wall and even on the window, and will break the current solar panels can only be "lying" to receive the sun light limitations.

It is reported that the dye-sensitized cells to convert light energy into electrical energy efficiency is less than traditional solar cells, but because the proper functioning of the poor sunshine, daylight time longer manufacture electricity more and more suitable located in the countries and regions of the tropical cloud cover.

The acid molecules break up into its components 

2013年01月15日(火) 10時35分
A very simple modern battery is the zinc-carbon battery for Inspiron 1750 battery, called the carbon battery for short.

This battery contains acidic material within and a rod of zinc down the center. Here's where knowing a little bit of chemistry helps.

When zinc is inserted into an acid, the acid begins to eat away at the zinc, releasing hydrogen gas and heat energy. The acid molecules break up into its components: usually hydrogen and other atoms. The process releases electrons from the Zinc atoms that combine with hydrogen ions in the acid to create the hydrogen gas.

If a rod of carbon is inserted into the acid, the acid does nothing to it.

But if you connect the carbon rod to the zinc rod with a wire, creating a circuit, electrons will begin to flow through the wire and combine with hydrogen on the carbon rod. This still releases a little bit of hydrogen gas but it makes less heat. Some of that heat energy is the energy that is flowing through the circuit.

The energy in that circuit can now light a light bulb in a flashlight or turn a small motor. Depending on the size of the battery for W953G, it can even start an automobile.

Eventually, the zinc rod is completely dissolved by the acid in the battery, and the battery can no longer be used.

For a "great" on-line page about batteries, visit the Energizer Learning Center.

Mr. Gehry agreed to design his first playground 

2013年01月15日(火) 10時23分
The Battery Conservancy, the non-profit group that maintains the City park (adjoining Battery Park City) on Manhattan’s southern tip, is entering the final stretch of its design and construction phase this year. By 2014, the Conservancy hopes to implement its 25-acre Master Plan. “We have a sense of completing battery for rn873 RM791 the culmination of the landscape in 2012-2013,” said Warrie Price, the Conservancy’s president since helping found the organization in 1994.

“We’re 97 percent complete or in construction now,” added Ms. Price. “The one-acre Frank Gehry play space is the next-to-last piece to be designed,” she added, in a reference to one of the park’s most anticipated features. Mr. Gehry is a renowned architect whose local work includes Eight Spruce Street, and whose fame is such that the developer of that building (one of the tallest residential structures in the Western Hemisphere) changed its name from “Beekman Tower” to “New York by Gehry” to capitalize on the designer’s cachet.

In 2007, Mr. Gehry agreed to design his first playground, free of charge, for the Battery Conservancy. At the time, the project was projected to cost $10 million. More recently, the Conservancy circulated a request for qualifications for another firm to implement Mr. Gehry’s design.

The deadline for submissions was January 4, and the Conservancy now plans to announce the winning selection on February 27. Ms. Price said, “we had a wonderful response from 17 firms, and we’re thrilled with the battery for Vostro 1310 battery teams that were brought together. People are excited about building Frank Gehry’s conceptual and schematic design.” She added that “we’re not going to go public with it until the selected team reviews the design and we have a buildable plan.”

Let us know how you can search your battery through Dell website 

2012年11月28日(水) 11時36分
In case you already have a Dell laptop prior hand then buying a Dell laptop battery becomes very easy. You are already aware of the model,battery for Latitude D830 batterytype and with all other necessary details. Besides, one of the major factors that one must keep an eye on is the safety and precaution details that one should abide by while purchasing or using Laptop Battery for that matter.

Since Dell has its products distributed to all the electronic stores and reputed companies thus, if you first check at the Dell website and inquire about the type and model of battery you are looking for then half of your work is actually done online. Not only this will provide you information but, will make you buy Dell laptop battery , online in a easy and convenient way.

Now, let us know how you can search your battery through Dell website. Start with filling the search box given on the portal. In case you are well aware of the battery name, type and model then fill in the details in the box. You will be then given various battery options through which you can choose the best one for you. Steer the products and add them to your shopping cart in case it suits your laptops requirements. Apart from this, you may even surf through different websites and select bright Latitude D820 batteryand buy Dell charger that suits you the most.

Today,Internet,electronic stores,etc.offer a good discount on laptop battery and due to the huge availability of products and services it has become easy for people to purchase and ordr laptop battery of and brand from any brand from any store.One essential thing that you must keep in mind is that do not go for compatible batteries.For instance,if your laptop is of Dell and you are buying a battery that though suits the requirements yet is not of Dell brand then avoid purchasing that one as it may harm your system or laptop.

The NiCd contains toxic metals and is environmentally unfriendly 

2012年11月28日(水) 11時35分
We often get puzzled by announcements of new batteries that are said to offer very high energy densities, deliver 1000 charge/discharge cycle and are paper-thin. Are they real? Perhaps — but not in one and the samehigh quality rn873 Vostro 1310 battery. While one battery type may be designed for small size and long runtime, this pack will not last and wear out prematurely. Another battery may be built for long life, but the size is big and bulky. A third battery may provide all the desirable attributes, but the price would be too high for commercial use.

Battery manufacturers are well aware of customer needs and have responded by offering packs that best suit the specific applications. The mobile phone industry is an example of clever adaptation. Emphasis is placed on small size, high energy density and low price. Longevity comes in second.

The inscription of NiMH on a battery pack does not automatically guarantee high energy density. A prismatic Nickel-Metal Hydride battery for a mobile phone, for example, is made for slim geometry. Such a pack provides an energy density of about 60Wh/kg and the cycle count is around 300. In comparison, a cylindrical NiMH offers energy densities of 80Wh/kg and higher. Still, the cycle count of this battery is moderate to low. High durability NiMH batteries, which endure 1000 discharges, are commonly packaged in bulky cylindrical cells. The energy density of these cells is a modest 70Wh/kg.

Compromises also exist on lithium-based batteries. Li?ion packs are being produced for defense applications that far exceed the energy density of the commercial equivalent. Unfortunately, these super-high capacity Li?ion batteries are deemed unsafe in the hands of the public and the high price puts them out of reach of the commercial market.

In this article we look at the advantages and limitations of the commercial battery. The so-called miracle battery that merely live in controlled environments is excluded. We scrutinize the batteries not only in terms of energy density but also longevity, load characteristics, maintenance requirements, self-discharge and operational costs. Since NiCd remains a standard against which other batteries are compared, we evaluate alternative chemistries against this classic battery type.

Nickel Cadmium (NiCd) — mature and well understood but relatively low in energy density. The NiCd is used where long life, high discharge rate and economical price are important. Main applications are two-way radios, biomedical equipment, professional video cameras and power tools. The NiCd contains toxic metals and is environmentally unfriendly.

Nickel-Metal Hydride (NiMH) — has a higher energy density compared to the NiCd at the expense of reduced cycle life. NiMH contains no toxic metals. Applications include mobile phones and laptop computers.

Lead Acid — most economical for larger power applications where weight is of little concern. The lead acid battery is the preferred choice for hospital equipment, wheelchairs, emergency lighting and UPS systems.

Lithium Ion (Li?ion) — fastest growing battery system. Li?ion is used where high-energy density and lightweight is of prime importance. The technology is fragile and a protection circuit is required to assure safety. Applications include notebook computers and cellular phones.

Lithium Ion Polymer (Li?ion polymer) — offers the9cells rn873 rn873 Inspiron 1750 battery attributes of the Li-ion in ultra-slim geometry and simplified packaging. Main applications are mobile phones.

Figure 1 compares the characteristics of the six most commonly used rechargeable battery systems in terms of energy density, cycle life, exercise requirements and cost. The figures are based on average ratings of commercially available batteries at the time of publication.