September 2009

The secrets of battery runtime

By laptopsbattery - September 29th, 2009, 21:28, Category: General

The secrets of battery runtime

Is the runtime of a portable device directly related to the size of the laptop battery? The answer should be 'yes' but in reality, the runtime is governed by other attributes than the specified capacity alone.

This paper examines the cause of unexpected downtime and short battery service life. We look at four renegades - declining capacity, increasing internal resistance, elevated self-discharge and premature voltage cut-off on discharge. We evaluate how these regenerative deficiencies affect nickel, lead and lithium-based batteries. Declining capacity The amount of charge a laptop battery can hold gradually decreases due to usage and aging. Specified to deliver 100% capacity when new, the battery should be replaced when the capacity drops to below 80% of the nominal rating. Some organizations may use different end-capacities as a minimal acceptable performance threshold.

The energy storage of a battery can be divided into three imaginary sections consisting of: available energy, the empty zone that can be refilled, and the unusable part (rock content) that increases with aging. Figure 1 illustrates these three sections.

Figure 1: Dell laptop Battery charge capacity.Three imaginary sections of a battery consisting of available energy, empty zone and rock content.

In nickel-based batteries, the so-called rock content is present in form of crystalline formation, also known as memory. Restoration is possible with a full discharge to one volt per cell. However, if no service is done for four months and longer, a full repair becomes increasingly more difficult the longer service is withheld. To prevent memory, nickel-based batteries should be deep-cycled once every one or two months. Nickel-cadmium and nickel-metal-hydride batteries are used for two-way radios, medical instruments and power tools.

Performance degradation of the lead-acid battery is caused by sulfation and grid corrosion. Sulfation is a thin layer that forms on the negative cell plate if the battery is being denied a fully saturated charge. Sulfation can, in part, be corrected with cycling and/or topping charge. The Battery grid corrosion, which occurs on the positive plate, is caused by over-charge. Lead-acid batteries are used for larger portable devices and wheeled applications.

Lithium-ion Toshiba laptop batteries lose capacity through cell oxidation, a process that occurs naturally during use and aging. The typical life span of lithium-ion is 2-3 years under normal use. Cool storage a 40% charge minimizes aging. An aged lithium-ion cannot be restored with cycling. Lithium-ion is found in cell phones and mobile computing.

Increasing internal Resistance The capacity of a battery defines the stored energy - the internal resistance governs how much energy can be delivered at any given time. While a good battery is able to provide high current on demand, the voltage of a battery with elevated resistance collapses under a heavy load. Although the battery may hold sufficient capacity, the resulting voltage drop triggers the 'low battery' indicator and the equipment stops functioning. Heating the battery will momentarily increase the output by lowering the resistance.

A battery with high internal resistance may still perform adequately on a low current appliance such as a flashlight, portable CD player or wall clock. Digital Camera battery equipment, on the other hand, draw heavy current bursts. Figure 2 simulates low and high internal resistance with a free-flowing and restricted tap.

Figure 2: Effects of internal battery resistance.A battery with low internal resistance is able to provide high current on demand. With elevated resistance, the battery voltage collapses and the equipment cuts off.

Nickel-cadmium offers very low internal resistance and delivers high current on demand. In comparison, nickel-metal-hydride starts with a slightly higher resistance and the readings increase rapidly after 300 to 400 cycles.

Lithium-ion has a slightly higher internal resistance than nickel-based batteries. The cobalt system tends to increase the internal resistance as part of aging whereas the manganese (spinel) maintains the resistance throughout Apple laptop battery life but loses capacity through chemical reaction. Cobalt and manganese are used for the positive electrodes.

High internal resistance will eventually render the battery useless. The energy may still be present but can no longer be delivered. This condition is permanent and cannot be reversed with cycling. Cool storage at a partial state-of-charged (40%) retards the aging process.

The internal resistance of Lead-acid batteries is very low. The A1175 A1185 battery responds well to short current bursts but has difficulty providing a high, sustained load. Over time, the internal resistance increases through sulfation and grid corrosion.

Elevated self-discharge

All HP laptop batteries suffer from self-discharge, of which nickel-based batteries are among the highest. The loss is asymptotical, meaning that the self-discharge is highest right after charge and then levels off. nickel-based batteries lose 10% to 15% of their capacity in the first 24 hours after charge, then 10% to 15% per month afterwards. One of the best batteries in terms of self-discharge is Lead-acid; it only self-discharges 5% per month. Unfortunately, this chemistry has the lowest energy density and is ill suited for portable applications. lithium-ion self-discharges about 5% in the first 24 hours and 1-2% afterwards. Adding the protection circuit increases the discharge by another 3% per month. The protection circuit assures that the voltage and current on each cell does not exceed a safe limit. Figure 3 illustrates a battery with high self-discharge.

Figure 3: Effects of high load impedance.Self-discharge increases with age, high cycle count and elevated temperature. Discard a battery if the self-discharge reaches 30% in 24 hours.

The self-discharge on all battery chemistries increase at higher temperatures. Typically, the rate doubles with every 10C (18F). A noticeable energy loss occurs if a battery is left in a hot vehicle.

Aging and usage also affect self-discharge. nickel-metal-hydride is good for 300-400 cycles, whereas nickel-cadmium may last over 1000 cycles before high self-discharge affects the performance. An older nickel-based Sony laptop battery may lose its energy during the day through self-discharge rather than actual use. Discard a battery if the self-discharge reaches 30% in 24 hours.

Nothing can be done to reverse this deficiency. Factors that accelerate self-discharge are damaged separators induced by crystalline formation, allowing the packs to cook while charging, and high cycle count, which promotes swelling in the cell. Lead and lithium-based batteries do not increase the self-discharge with use in the same manner as their nickel-based cousins do. Premature voltage cut-off Not all stored battery power can be fully utilized. Some equipment cuts off before the designated end-of-discharge voltage is reached and precious battery energy remains unused. Applications demanding high current bursts push the battery voltage to an early cut-off. This is especially visible on iBook G4 battery with elevated internal resistance. The voltage recovers when the load is removed and the battery appears normal. Discharging such a battery on a moderate load with a battery analyzer to the respective end-of-discharge threshold will sometimes produce residual capacity readings of 30% and higher, jet the battery is inoperable in the equipment. Figure 4 illustrates high cut-off voltage.

Figure 4: Illustration of equipment with high cut-off voltage.Some portable devices do not utilize all available battery power and leave precious energy behind.

High internal battery resistance and the equipment itself are not the only cause of premature voltage cut-off - warm temperature also plays a role by lowering the battery voltage. Other reasons are shorted cells in a multi-cell battery pack and memory on nickel-based batteries.

The article is from http://www.batteryuniversity.com/

What causes laptop batteries to overheat?

By laptopsbattery - September 25th, 2009, 15:48, Category: General

What causes laptop batteries to overheat?

In conjunction with the United States Consumer Product Safety Commission (CPSC), Dell and Apple Computer announced large recalls of laptop batteries in the summer of 2006, followed by Toshiba and Lenovo. Sony manufactured all of the recalled batteries, and in October 2006, the company announced its own large-scale recall. Under the right circumstances, these batteries could overheat, potentially causing burns, an explosion or a fire.

To understand why that happened, it's helpful to know a little bit about how batteries work. Laptop Batteries have a negatively charged terminal and a positively charged terminal. In a battery, energy from electrochemical reactions causes electrons (negatively charged particles) to collect at the battery's negatively charged pole. Charged particles are attracted to opposite charge, so if you connect a battery to a circuit, the electrons will flow from the negative pole, through the circuit and to the Inspiron 1501 battery's positively charged pole. In other words, the battery generates a moving charge, or electricity. (See How Electricity Works and How Batteries Work for more details).

The exact reaction that generates the electrons varies, depending on the type of 40Y6797 battery. In a lithium-ion battery, you'll find pressurized containers that house a coil of metal and a flammable, lithium-containing liquid. The manufacturing process creates tiny pieces of metal that float in the liquid. Manufacturers can't completely prevent these metal fragments, but good manufacturing techniques limit their size and number. The cells of a lithium-ion Pavilion DV2000 battery also contain separators that keep the anodes and cathodes, or positive and negative poles, from touching each other.

If the Acer Aspire One battery gets hot through use or recharging, the pieces of metal can move around, much like grains of rice in a pot of water. If a piece of metal gets too close to the separator, it can puncture the separator and cause a short circuit. There are a few possible scenarios for what can go wrong in the case of a short circuit:

If it creates a spark, the flammable liquid can ignite, causing a fire.
If it causes the temperature inside the battery to rise rapidly, the A1175 A1185 battery can explode due to the increased pressure.
If it causes the temperature to rise slowly, the battery can melt, and the liquid inside can leak out.
- There are several reasons why- multiple laptop battery models have been recalled in the past few years. People want small, lightweight laptops that they can use for long periods. They also want their laptops to have bright screens and lots of processing power. For these reasons, laptop batteries have to be relatively small, but they also have to hold a lot of energy and last a long time.

Making lithium-ion Inspiron 640m battery that can hold more power for a longer period requires vital components, including the separators, to be small and thin. The reduction in size makes it more likely that the batteries can fail, break, leak or short circuit.

Check out the next page for more information-, including how to determine if the recall affects your laptop.

The New hair battery technology

By laptopsbattery - September 22nd, 2009, 15:08, Category: General

The New hair battery technology

Researchers at the Universties of Miami, Tokyo and Tohoku have discovered a new form of laptop battery. Charged by the application of a very strong magnetic field, the Magnetic Tunnel Junction (MTJ) contains a set of nano-magnets - zones some 5 nanometers across in a zinc-gallium-arsenic-mangnesium matrix - which absorb energy and then release it over time. Although the effect had been predicted, the size and duration of the result was not "We had anticipated the effect, but the device produced a voltage over a hundred times too big and for tens of minutes Apple A1148 , rather than for milliseconds as we had expected," said one of the researchers. "That this was counterintuitive is what lead to our theoretical understanding of what was really going on."

The Magnetic Tunnel Junction device stores power

The MJT is the top part of the illustration, and is roughly the same diameter as a human hair compare to Toshiba laptop battery. Beneath that is a magnified image of the central part of the device: the white spots are atoms, and the circles contain the nano-magnets that store the power. Picture: Phan Nam Hai/University of Miami

I've yet to dig out the paper in Nature to find out how far this is from being useful as a power source - as the current device is a few hundred micrometers across with IBM laptop battery, it's not going to be storing megawatts. But it's the sort of thing that could be created in vast arrays, like any semiconductor device, and if they're getting to the bottom of the underlying physics then the same effect could be used in many different configurations of Thinkpad Z60T battery. What may be much more interesting than just power storage is the fact, mentioned almost in passing in the press release, that the current delivered by the MTJ is spin-polarised; the electrons are predominately spinning in one direction.

That's hot news for spintronics, which we've covered previously and which, together with graphene, has the most exciting potential for fundamentally new computational devices. Spin logic could work much faster at much lower power than even today's finest electronics Dell laptop battery, because it doesn't rely on currents flowing and the consequent unavoidable loss.

And, as the researchers say, if this discovery leads to new insights into basic magnetic theory, there are almost no limits to how profoundly it could affect modern life with these Thinkpad R40 battery . Which is a bit over the top - just not that much.

How to choose a charger

By laptopsbattery - September 20th, 2009, 19:11, Category: General

How to choose a charger

Many people when buying rechargeable batteries, a look at the capacity, or look the brand. However, to know that buying a good performance of the rechargeable laptop battery is also a great school of learning.

Batteries can be divided into two categories, one category is "one cell", and the other is "secondary battery." "One cell" As the name suggests is the use of no value once the battery, "secondary dell laptop battery" simply means that rechargeable batteries, can charge for further use.

Lithium batteries can be understood as digital products, special batteries, its shape according to the design of digital products can be arbitrarily changed, lithium batteries almost no memory effect, and use a long time. However, lithium batteries (Sony PCGA-BP71 Sony PCGA-BP1N) are expensive, and between the different specifications of the lithium batteries can not be generic.

In the rechargeable Toshiba PA3451U-1BRS batteries are printed on the surface of a similar mark, indicating this product is what type of battery. NI-MH says that nickel-metal hydride batteries, is actually very simple, NI is the chemical letters Nickel, NH, said hydrogen. By the same token NI-Cd is expressed as a nickel-cadmium batteries.

Battery rated capacity refers to a certain discharge conditions, the Sony VGP-BPS9 battery discharge to the release of electricity cut-off voltage. No. 7 currently on the market capacity of the battery 400mAh-900 mAh mostly between the 5 batteries from 1000 mAh-2500 mAh range. Of course, in a sense, the capacity is of course the bigger the better, because of large capacity means longer battery life.

It is also noteworthy that, among the different capacities of batteries do not mix. For example, three 2300 mAh of the Dell inspiron 1526 battery batteries 1300 mAh battery, which emit an effective current of only 1300 mAh, from the physics can be very simple to understand this point.

The rechargeable Inspiron 640m battery are generally marked on the standard charge time and quick charge time, charging the speed with charger related.

Slow charge generally use constant current charging mode, and the battery is full and automatically converted to trickle charge state. Has the advantage of slow charge circuit design is simple and easy to implement, prices are also lower; As a result of low current constant current charging, effectively reducing the pavilion ZV6000 battery charging process in the heat, to extend the battery life is very good. Drawback is the charging time is too long, especially in the case of large quantity of batteries a bit powerless.

Fast charge is generally using a large pulse current charging Pavilion DV2000 battery , but because of high current battery charging process will generate polarized responses, leading to the rapid increase in battery temperature, full power on after resume a likely explosion and combustion, so fast charge also uses a special chip to control the charging process of Dell Inspiron e1505 Battery, automatically stop charging once filled so that the whole process of charging has become safe and efficient.

In the end is a standard charger or optional fast charger that can be purchased according to the needs of users. Here to remind consumers to purchase brand-name products charger must be, and if I get quick charger fot yoyr Dell Inspiron 6000 Battery,, be sure to understand whether the automatic power-off function.

The article Via batteryblog

How to choose a charger

By laptopsbattery - September 20th, 2009, 17:22, Category: General

How to choose a charger

Many people when buying rechargeable batteries, a look at the capacity, or look the brand. However, to know that buying a good performance of the rechargeable laptop battery is also a great school of learning.

Batteries can be divided into two categories, one category is "one cell", and the other is "secondary battery." "One cell" As the name suggests is the use of no value once the battery, "secondary dell laptop battery" simply means that rechargeable batteries, can charge for further use.

Lithium batteries can be understood as digital products, special batteries, its shape according to the design of digital products can be arbitrarily changed, lithium batteries almost no memory effect, and use a long time. However, lithium batteries (Sony PCGA-BP71 Sony PCGA-BP1N) are expensive, and between the different specifications of the lithium batteries can not be generic.

In the rechargeable Toshiba PA3451U-1BRS batteries are printed on the surface of a similar mark, indicating this product is what type of battery. NI-MH says that nickel-metal hydride batteries, is actually very simple, NI is the chemical letters Nickel, NH, said hydrogen. By the same token NI-Cd is expressed as a nickel-cadmium batteries.

Battery rated capacity refers to a certain discharge conditions, the Sony VGP-BPS9 battery discharge to the release of electricity cut-off voltage. No. 7 currently on the market capacity of the battery 400mAh-900 mAh mostly between the 5 batteries from 1000 mAh-2500 mAh range. Of course, in a sense, the capacity is of course the bigger the better, because of large capacity means longer battery life.

It is also noteworthy that, among the different capacities of batteries do not mix. For example, three 2300 mAh of the Dell inspiron 1526 battery batteries 1300 mAh battery, which emit an effective current of only 1300 mAh, from the physics can be very simple to understand this point.

The rechargeable Inspiron 640m battery are generally marked on the standard charge time and quick charge time, charging the speed with charger related.

Slow charge generally use constant current charging mode, and the battery is full and automatically converted to trickle charge state. Has the advantage of slow charge circuit design is simple and easy to implement, prices are also lower; As a result of low current constant current charging, effectively reducing the pavilion ZV6000 battery charging process in the heat, to extend the battery life is very good. Drawback is the charging time is too long, especially in the case of large quantity of batteries a bit powerless.

Fast charge is generally using a large pulse current charging Pavilion DV2000 battery , but because of high current battery charging process will generate polarized responses, leading to the rapid increase in battery temperature, full power on after resume a likely explosion and combustion, so fast charge also uses a special chip to control the charging process of Dell Inspiron e1505 Battery, automatically stop charging once filled so that the whole process of charging has become safe and efficient.

In the end is a standard charger or optional fast charger that can be purchased according to the needs of users. Here to remind consumers to purchase brand-name products charger must be, and if I get quick charger fot yoyr Dell Inspiron 6000 Battery,, be sure to understand whether the automatic power-off function.

The article Via batteryblog

How to choose a charger

By laptopsbattery - September 20th, 2009, 17:19, Category: General

How to choose a charger

Many people when buying rechargeable batteries, a look at the capacity, or look the brand. However, to know that buying a good performance of the rechargeable laptop battery is also a great school of learning.

Batteries can be divided into two categories, one category is "one cell", and the other is "secondary battery." "One cell" As the name suggests is the use of no value once the battery, "secondary dell laptop battery" simply means that rechargeable batteries, can charge for further use.

Lithium batteries can be understood as digital products, special batteries, its shape according to the design of digital products can be arbitrarily changed, lithium batteries almost no memory effect, and use a long time. However, lithium batteries (Sony PCGA-BP71 Sony PCGA-BP1N) are expensive, and between the different specifications of the lithium batteries can not be generic.

In the rechargeable Toshiba PA3451U-1BRS batteries are printed on the surface of a similar mark, indicating this product is what type of battery. NI-MH says that nickel-metal hydride batteries, is actually very simple, NI is the chemical letters Nickel, NH, said hydrogen. By the same token NI-Cd is expressed as a nickel-cadmium batteries.

Battery rated capacity refers to a certain discharge conditions, the Sony VGP-BPS9 battery discharge to the release of electricity cut-off voltage. No. 7 currently on the market capacity of the battery 400mAh-900 mAh mostly between the 5 batteries from 1000 mAh-2500 mAh range. Of course, in a sense, the capacity is of course the bigger the better, because of large capacity means longer battery life.

It is also noteworthy that, among the different capacities of batteries do not mix. For example, three 2300 mAh of the Dell inspiron 1526 battery batteries 1300 mAh battery, which emit an effective current of only 1300 mAh, from the physics can be very simple to understand this point.

The rechargeable Inspiron 640m battery are generally marked on the standard charge time and quick charge time, charging the speed with charger related.

Slow charge generally use constant current charging mode, and the battery is full and automatically converted to trickle charge state. Has the advantage of slow charge circuit design is simple and easy to implement, prices are also lower; As a result of low current constant current charging, effectively reducing the pavilion ZV6000 battery charging process in the heat, to extend the battery life is very good. Drawback is the charging time is too long, especially in the case of large quantity of batteries a bit powerless.

Fast charge is generally using a large pulse current charging Pavilion DV2000 battery , but because of high current battery charging process will generate polarized responses, leading to the rapid increase in battery temperature, full power on after resume a likely explosion and combustion, so fast charge also uses a special chip to control the charging process of Dell Inspiron e1505 Battery, automatically stop charging once filled so that the whole process of charging has become safe and efficient.

In the end is a standard charger or optional fast charger that can be purchased according to the needs of users. Here to remind consumers to purchase brand-name products charger must be, and if I get quick charger fot yoyr Dell Inspiron 6000 Battery,, be sure to understand whether the automatic power-off function.

The article Via batteryblog

How to use and conservation of GPS built-in lithium battery

By laptopsbattery - September 15th, 2009, 17:15, Category: General

How to use and conservation of GPS built-in lithium battery

1. Do not deliberately GPS built-in lithium Laptop battery that will put clean in the charge, when the system prompted a time of low power can be charged, should be put before the injury for the lithium battery is not small.

2. To use the random charging accessories for charging, do not use third-party charger.

3. Most of the built-in lithium-car GPS, so do not be demolished or converted the laptop battery without permission.

4, as far as possible to avoid the body exposed to extremely high or extremely low temperature environment, but also to avoid the erosion of the liquid.

In fact, Car GPS built-in lithium Pavilion DV2000 battery is not your imagination so fragile, so long as a little heart, the conservation and reasonable, built-in lithium battery life can be maintained at three years and change bad habits, we can give built-in lithium battery with the greatest protection, let give full play to their power as a car navigation system to provide a stable life to protect.

At present, the market most of the mainstream car GPS with built-in lithium battery power supply. Lithium-ion Toshiba PA3107U-1BRS PA3451U-1BRShas a discharge stability, small size and other features relative to conventional nickel-metal hydride and nickel cadmium batteries for the obvious advantages. Many portable electronics market, digital products are used in lithium-ion battery power supply.

But lithium-ion Toshiba PA3399U-2BRS battery is not perfect, the use of lithium more stringent environmental requirements, and the high cost of batteries and the discharge current is its relatively small defects can not be ignored. Then, as the use of large lithium-ion batteries: automotive GPS products, the use of lithium batteries that power supply should be careful when there. In daily for VGP-BPS2C battery conservation, and many casual habits could have built-in lithium-vehicle navigation systems cause fatal injuries. So we specialize in power from a vehicle built-in lithium use and conservation aspects of the daily summary of some experiences to share.

Many users use the GPS when the car, regardless of the body are used to power the adequacy of the charging of plug in vehicles to use, such use would cause harm lithium batteries in serious even built-in lithium PA3465U-1BRS PA3465U-1BRS battery can not be used. Plug in Car Charger for GPS because the car after the power supply will be carried out on the built-in lithium rechargeable, if the user habitually used GPS navigation, you are doing each time you use the equivalent of charging and discharging, thereby affecting the battery life. Which affect the capacity of lithium Toshiba PA3384U-1BRS life and a major factor is the need for a battery charge and discharge times, which is why many users feel less and less power-car GPS durable reason.

The right to use is: should wait to run out of electricity, or GPS navigation instrument in itself to give low power to remind the car after the connection charge for charging to use. If your car GPS Car Charger to use the long-term connection, it is best to conduct a full-month charge and discharge, which is run out of Toshiba PA3399U-1BRS power to conduct a full volume of charge, so that the greatest degree of protection can extend the life of lithium batteries.

The user has just purchased for GPS products, its appearance in general only 50% of capacity or less. When you first use the Apple laptop battery in I need to put power to make, and then charging an external battery charger, and charge for the first time the best more than 15 hours, the second and the third meeting such as the battery runs out after use, the charging time is best but also more than 12 hours, but it should be noted that charge no more than 24 hours, otherwise the battery will produce a surplus of energy resulting in the internal decomposition of the electrolyte inside the battery voltage increase caused by natural or explosions.

In addition, for long-term non-use of the GPS, the Li-ion Sony PCGA-BP2NX PCGA-BP71 will automatically discharge the next best to the battery is full before use after use, so as to avoid over-discharge the battery caused damage. The use of GPS in the process, try to avoid exposure to the body or in a humid environment, the use of harsh external environment would cause instability in Li-ion battery discharge.

The article Via battery blog

Lithium battery explosion reason and prevention

By laptopsbattery - September 11th, 2009, 17:05, Category: General

Lithium battery explosion reason and prevention

According to the U.S. well-known science writer Marshall Brain series of articles in the lithium batteries introduction, the vast majority of lithium battery explosion caused by a short circuit, and the specific reasons, including charging overvoltage / over-current use of aging.

Lithium laptop battery manufacturing process, because the manufacturing process itself flawed, it is easy to be insulated in this between the two poles, leaving metal dust, copper foil, aluminum foil pieces. The angle is expected in the battery than the fever (more common in long-term use or charging), the like boiling water in a grain of rice, as in the electrolyte to make random thermal motion. If you happen to have the Canon BP-511 battery positive and negative particles or debris near the middle of the diaphragm level, it could create a divide perforation, triggering micro-short circuit. As the batteries are flammable organic electrolytes, micro-short-circuit may cause an explosion, burning and other accidents, generally have the following three cases:

1. Sparks ignited the electrolyte, and thus bring disaster to come into contact with plastic body and flammable, resulting in fire;

2. Was experiencing an increase of temperature caused by the battery, the discount laptop battery inside the space is small, perhaps because of increased pressure to explode;

3. Batteries slower rise in temperature, the battery case to melt gradually, so that corrosive electrolyte leakage.

Lithium Dell Inspiron e1505 Battery safety problems can not stop now, because then the advanced manufacturing technology, will inevitably lead to planting the seeds in the electrolyte "missile." Should be noted that the formal sector of lithium battery production and sales have strict norms of acceptable quality lithium batteries, the number and size of debris have been controlled within a small, very low risk of perforation of diaphragm; batteries outside the Shell also used flame-retardant material, is not prone to fire.

The explosion-proof lithium battery of measures

Lithium Dell Inspiron 6000 Battery safety problems, the battery manufacturer, of course well aware, then what they used explosion-proof measures? Li-ion batteries for notebook computers, for example, its working principle is: Lithium batteries near full charge and discharge almost drained when the voltage drop, the control circuit detects this situation, notify the protection circuit cut off power supply to prevent overcharge or excessive discharge, so as not to shorten battery life.

The current notebook lithium batteries possess a more complete multi-level protection mechanism, even in the power charger, notebook computers unusual circumstances, the Dell Inspiron 1300 battery laptop can also be converted to automatic protection status, is generally not an explosion. But once the control circuit and protection circuit of the ability to work reduced hours, the battery on the verge of "dangerous" the. Mobile phones and other electronic products, lithium battery charge and discharge protection mechanisms, similar to this.

Do not need it "at arm's length"

In recent years, lithium-ion electronic products explosions often found newspapers, aroused a lot of consumer panic, some people for their own mobile phones, MP3 charging often "at arm's length"; also because of fear, simply a long-term will be cast aside Dell laptop battery, cause scrap. However, survey results, the majority of lithium battery explosions are the result of the user pay attention to safety tips, such as unauthorized modification, use of non-matching charger, the A1175 A1079 battery placed in extreme environments such as making.

Should be pointed out that the lithium Dell inspiron 9400 battery technology as a kind of after 30 years of study, has successfully commercialized the mature technology, its safety is guaranteed. Regular brands of lithium batteries at the factory will have been numerous Road test procedure after they are sold as well as information feedback mechanism in order to recall the product in question in time.

United States Transportation Security Administration (TSA) is given following the recommendations of the safe use of lithium batteries:

1. Using the original charger: Li-ion battery charging time is the high period of bombing. Than the original VGP-BPS5 VGP-BPS2C battery charger is compatible with the battery charger to ensure better security.

2. Use of a reliable battery: try to buy original Sony laptop battery, not to save money to buy "second-hand goods", such batteries may be through maintenance, and reliable than original batteries.

3. Do not place the Latitude D620 battery extreme environments: high temperature, collisions, etc. are all important causes of battery explosion, as far as possible so that the battery is in a stable environment, away from the high-temperature areas.

4. Do not attempt to modify: the phone is a sophisticated communications equipment, in the design, manufacturers will have on its security, strictly textual research. After modification, the battery may be at not taking into account the environment before, an increase of security risks.

Via Batterytalk.info

Accumulator is no longer pollute the environment

By laptopsbattery - September 8th, 2009, 19:23, Category: General

Accumulator is no longer pollute the environment

Kinds of new acid-free batteries - lead-oxide laptop batteries through the national authority before testing, all targets were met or exceeded the national standard. This means that 150-year-old battery technology was a revolutionary breakthrough, making the traditional lead-acid batteries polluting industries into a zero-pollution environment-friendly industries possible.

Lead-oxygen battery is the invention of two brothers - West Cong Zhang, Zhang Sai-wen, who under the leadership of Shaanxi and the Green Energy Technology Co., Ltd. After more than six years of research, finally reaction mechanism of electrolyte in the Dell laptop battery research breakthrough and the preparation of a compound salts out of aqueous solution of diluted sulfuric acid aqueous solution instead of the traditional.

Was responsible for this testing is the Ministry of Industry and Information Technology Institute of Chemical Physics Power Product Quality Supervision and Inspection Center, was recognized as authoritative testing organizations within the industry.

According to reports, the submission of the three kinds of laptop batteries are the product under the conditions of industrial production (non-laboratory products). They are the cars to start batteries, electric bicycles and electric vehicles power battery special battery, application fields and market prospect is very broad.

According to experts, currently used batteries generally can be divided into a dry (normal batteries), secondary HP laptop battery (rechargeable batteries, mainly used in mobile phones, computers), lead-acid batteries (mainly used in automobile, electric vehicles) the three class. With regard to the battery pollution, the masses are most concerned about reports the most ordinary Apple laptop battery. In fact, the production process is now common dry batteries without adding cadmium, lead, arsenic and other substances are no longer become a serious source of pollution. On the contrary, a large number of car battery, lead-acid batteries used in electric vehicles because they contain lead and sulfuric acid, but rather rubbish dump, one of the most dangerous items.

It is understood that corrosion of lead-acid battery lead after the spill of heavy metals and acids will not only seriously polluted soil and water, air and the environment, ecological balance can also cause damage, but also trigger the body metabolism, reproductive and neurological aspects of the disease the Dell Inspiron e1505 Batterybattery , the body of lead Once the excessive levels, it will lead to mental decline, but also easy to induce malignant tumors of children, and even lead to death.

Compared with the traditional lead-acid Toshiba PA3399U-2BRS batteries, lead batteries of oxygen greatly reduced pollution of the environment. Of Environmental Science and Engineering, Nankai University, Dean Zhou Xing, said lead-acid batteries of the solid, gaseous pollution can be eliminated, but can not avoid the water-soluble heavy metal ions of lead pollution. Lead-oxygen IBM laptop battery although the production process and lead-acid battery production process the same, but thanks to a salt water solution instead of sulfuric acid and lead ion concentration is very low, almost no emissions, greatly reducing the risk of lead contamination.

In addition, the lead-oxygen Latitude D620 battery for the replacement of sulfuric acid complex salts and additives can make use of iron and steel enterprises discharge waste from a coal-based chemical synthesis to obtain a simple to solve a number of steel companies can not handle the cost of treatment may need to spend a lot of pollution emissions.

Chang brothers have been lead-oxygen Dell Inspiron 1300 battery in three Chinese national patent. The Ministry of Industry and Information Technology Electronic Science and Technology Information Institute points (Science and Technology Novelty Search) shows that the world there is no similar technology.

Zhou Xing believes that the world faces an energy and environmental crisis, the advent of lead-oxygen battery of great significance and far-reaching.

The article Via batteryblog

Accumulator is no longer pollute the environment

By laptopsbattery - September 8th, 2009, 19:23, Category: General

Accumulator is no longer pollute the environment

Kinds of new acid-free batteries - lead-oxide laptop batteries through the national authority before testing, all targets were met or exceeded the national standard. This means that 150-year-old battery technology was a revolutionary breakthrough, making the traditional lead-acid batteries polluting industries into a zero-pollution environment-friendly industries possible.

Lead-oxygen battery is the invention of two brothers - West Cong Zhang, Zhang Sai-wen, who under the leadership of Shaanxi and the Green Energy Technology Co., Ltd. After more than six years of research, finally reaction mechanism of electrolyte in the Dell laptop battery research breakthrough and the preparation of a compound salts out of aqueous solution of diluted sulfuric acid aqueous solution instead of the traditional.

Was responsible for this testing is the Ministry of Industry and Information Technology Institute of Chemical Physics Power Product Quality Supervision and Inspection Center, was recognized as authoritative testing organizations within the industry.

According to reports, the submission of the three kinds of laptop batteries are the product under the conditions of industrial production (non-laboratory products). They are the cars to start batteries, electric bicycles and electric vehicles power battery special battery, application fields and market prospect is very broad.

According to experts, currently used batteries generally can be divided into a dry (normal batteries), secondary HP laptop battery (rechargeable batteries, mainly used in mobile phones, computers), lead-acid batteries (mainly used in automobile, electric vehicles) the three class. With regard to the battery pollution, the masses are most concerned about reports the most ordinary Apple laptop battery. In fact, the production process is now common dry batteries without adding cadmium, lead, arsenic and other substances are no longer become a serious source of pollution. On the contrary, a large number of car battery, lead-acid batteries used in electric vehicles because they contain lead and sulfuric acid, but rather rubbish dump, one of the most dangerous items.

It is understood that corrosion of lead-acid battery lead after the spill of heavy metals and acids will not only seriously polluted soil and water, air and the environment, ecological balance can also cause damage, but also trigger the body metabolism, reproductive and neurological aspects of the disease the Dell Inspiron e1505 Batterybattery , the body of lead Once the excessive levels, it will lead to mental decline, but also easy to induce malignant tumors of children, and even lead to death.

Compared with the traditional lead-acid Toshiba PA3399U-2BRS batteries, lead batteries of oxygen greatly reduced pollution of the environment. Of Environmental Science and Engineering, Nankai University, Dean Zhou Xing, said lead-acid batteries of the solid, gaseous pollution can be eliminated, but can not avoid the water-soluble heavy metal ions of lead pollution. Lead-oxygen IBM laptop battery although the production process and lead-acid battery production process the same, but thanks to a salt water solution instead of sulfuric acid and lead ion concentration is very low, almost no emissions, greatly reducing the risk of lead contamination.

In addition, the lead-oxygen Latitude D620 battery for the replacement of sulfuric acid complex salts and additives can make use of iron and steel enterprises discharge waste from a coal-based chemical synthesis to obtain a simple to solve a number of steel companies can not handle the cost of treatment may need to spend a lot of pollution emissions.

Chang brothers have been lead-oxygen Dell Inspiron 1300 battery in three Chinese national patent. The Ministry of Industry and Information Technology Electronic Science and Technology Information Institute points (Science and Technology Novelty Search) shows that the world there is no similar technology.

Zhou Xing believes that the world faces an energy and environmental crisis, the advent of lead-oxygen battery of great significance and far-reaching.

The article Via batteryblog

Previous posts in September 2009

Blog

Calendar

<<   September 2009  >>
SMTWTFS
    1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30    

Join

Categories

Feeds

Powered by
ZoomBlog