Posts Tagged ‘lithium-ion’

Hitachi shows a lithium-Ion battery with 10 years battery life

December 8th, 2010

Hitachi has created a rechargeable lithium-ion battery cell that battery life of more than 10 years.

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Lithium-ion (Li-ion) are found in consumer electronics such as mobile phones and laptops, Hitachi said the new technology lead for the first time in batteries for electric vehicles and industrial wind parks.

Although Li-ion Laptop battery is about four times the power density than lead acid batteries, the relatively high cost and less than five years, life is not favorable for the great tasks and schedules in batteries, lead acid batteries up to 10 years before the can spare.

The company said on Monday had developed a new oxide composite material – a lithium-manganese spinel (LiMn204) – to the cathode of the Dell inspiron 1440 battery , improving their resistance to acid in the electrolyte, an important determinant of life. It also reduces the formation of crystals in the electrolyte, which also shortens the life of a battery.

Although the company is not all the details about these changes unless said that the cathode consists mainly of manganese in place of the commonly used cobalt, manganese is to get a lot easier, but so far there has been enough of this battery chemistry.

The Dell GD761 battery was a prototype with Shin-Kobe Electric Machinery Co Ltd and in cooperation with the New Energy of the Japanese Government and the Industrial Technology Development Organization established to promote research of energy produced. Hitachi has not indicated when the battery would go into production.

Hitachi, which has its fourth annual loss for the year ended 31 Reported in March, has said it will return to focus on green businesses, including batteries for electric vehicles as part of its plan to profitability.

Last year, researchers said at the Technical University of Graz in Austria, it was a silicone gel that make Li-ion batteries 10 times more efficient could be developed.

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Dell tip for lithum laptop battery

September 3rd, 2010

Q Is it easy to install a battery?

a Yes, very easy. First, make sure all open files are saved. Next, either attach the aC adapter directly to the lap or set the system to “hibernate” mode or shut off. Release the latch on the current battery, and simply install the replacement Dell Latitude D830 Battery.

Q Will Dell laps accept non-Dell batteries?

a Dell has a rigorous qualification process by which all Dell batteries are validated to ensure proper function, performance and safety. Some non-Dell batteries are available in the market with claims of compatibility with Dell systems. Dell cannot verify these claims, nor the safety of using them in a Dell system. Dell strongly encourages our customers to use only Dell lap batteries advertised as appropriate for their lap model. Only Dell lap batteries come with a 1-year warranty, are engineered for optimal safety and performance for Dell systems, and are supported by Dell technical support for the length of the warranty period.

Q What is a modular bay battery?

a In some lap systems Dell offers a Latitude D620 Battery that can be used in the optical drive media bay (DVD/CD drive bay). This enables the use of two batteries, potentially extending the available run time.

Q If I install a modular bay battery, are my primary and modular bay batteries working at the same time to power my lap computer?

a No, the modular bay battery is used first, then the system automatically switches to the primary battery. This is a deliberate design to allow the most amount of run time to remain in the primary XPS M1330 battery in case the modular bay battery is removed and replaced with an optical drive.

Q For what use is the strip of LED lights on my battery?

a Most Dell batteries have an LED indicator that allows users to see how much run time and how much overall battery life are available at the touch of a button.

To check Sony VGP-BPS8 charge, press the button and the number of lights that appear will tell you charge status. If all lights appear, you have a fully charged battery. Each light that appears accounts for approximately 20% charge.

To check the battery health, press and hold the status button on the battery charge gauge for at least 3 seconds. If no lights appear, the battery is in good condition and approximately more than 80 percent of its original charge capacity remains. Each light represents incremental degradation. If five lights appear, approximately less than 60 percent of the charge capacity remains, and you should consider replacing the Inspiron 1545 Battery .

Q What does Dell recommend for battery storage for a long period of time?

a When storing for more than 4 days these guidelines can better preserve the life of your battery:

Do not store batteries for long periods plugged into or attached to any power source. This includes aC adapters and lap security carts plugged into an outlet.

Lap batteries, including those stored in lap systems, should maintain an Operational Storage Temperature of 0° to 35°C (32° to 95°F).

Batteries may be stored in the lap or outside of the lap.

Charge batteries before storing. The recommended charging time should not exceed 1 hour. Typically, this should charge the laptop battery to between 80% and 100%. (Some discharge will take place over time. Stored batteries are expected to discharge 10-15% over a four month period, for your information.)

Q are there restriction with taking lithium-ion batteries on planes?

a Effective January 1, 2008, the Department of Transportation (DOT) through the Pipeline and Hazardous Materials Safety administration (PHMSa) will no longer allow loose lithium batteries in checked baggage. These batteries may continue to be packed in carry-on baggage.

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Know Your Laptop Battery

April 23rd, 2010

dell-inspiron-6000-battery

When given this question to any user of the laptop or notebook, they will get confused. This happens to me once when someone asks me about the battery of my laptop. As you can see, before replacing the laptop battery is very important to know a little about the field again in the first place. There are several types of laptop batteries that I will share in this post.

The types of laptop batteries:

1. Alkaline – This is a common battery around, but only a few use laptops and the ruling on alkaline Dell Inspiron 6400 Battery is not rechargeable. You have to shoot once to deflate.

2. Lead Acid – One of the most common uses of this kind is for laptops. It is durable, resistant and rechargeable, but unfortunately the Dell Inspiron 640m Battery is heavy and full of lead: P.

3. Lithium-Ion – The type of Vostro 1510 battery that you want to have for your laptop. The quick-charge effect is good for users moving (no need to wait a while for the battery is fully charged.) It is also environmentally friendly as well.

4. Nickel Cadmium – Ni-Cd is one of the oldest types and improved performance of rechargeable Vostro 1310 battery , but has a serious problem. After prolonged use (several years), the battery will be affected by the dreaded memory effect. This means that the use of battery life deteriorates over time.

5. Nickel Metal Hydride – Ni-MH is considered the successor to the Ni-Cd batteries, but unfortunately, the dreaded memory effect is as bad as well. However, comparison of the Ni-Cd and NiMH batteries, it lasts longer compared to its predecessor.

The chances of using lithium-ion Vostro 1520 battery is 99% (that is if you are using the new breed of laptops:)). Just check the abbreviation says Lion or Li-Ion batteries in laptop battery label. There are still some laptops that use Ni-MH batteries these days and you may want to check with the manufacturer if you can make an update of Ni-MH Li-Ion. The unauthorized use of batteries could lead to dire consequences …. so do be very careful about this. If you have a larger budget you might want to check the SMART batteries. It has a power management circuit and also tells the user which is the current condition of the battery.

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Do we need to fully discharge the batteries before recharging

April 15th, 2010

charge

To exhaust the battery completely before recharging laptop is not necessary today with lithium-ion laptop battery. The myth that notebook PC batteries should be fully discharged before recharging comes from the “memory effect” phenomenon that swept the old nickel-cadmium (NiCad) batteries of a laptop.

To circumvent the effect of memory and premature death of NiCd batteries, owners of old handsets had to fully discharge their Dell Inspiron 6400 Battery before recharging.

Laptops contain components that we now have advanced computer and no longer work with NiCad batteries. In contrast, today’s laptops run on the latest development in portable Dell Inspiron 6000 Battery technology – lithium ion. Lithium batteries do not suffer the memory effect like NiCad batteries do because they have no memory. You can recharge them, but still has some juice, without fear of reducing the energy capacity of the battery, run times and duration of life.

In fact, it is advisable to recharge lithium-ion Inspiron 630m Battery , while still have some power. However, you must comply fully with them from time to time to re-calibrate the indicator of battery life on the screen of your laptop. This indicator tells you how much longer the hardware of the laptop can last without being connected to an electrical outlet.

Unless you are still using an old laptop using NiCd batteries, you do not miss or shorten your Dell Inspiron 640m Battery life if you do not fully comply with its laptop batteries before recharging. Feel free to connect the laptop to an outlet with the battery in place while using it. Laptop batteries can recharge while ensuring that the hardware of the laptop will not die with you when an outage occurs.

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Methods of discharge : C-Rate

March 29th, 2010

The task of a battery is to store energy and deliver it in a desired time and a controlled way again. In this section, we will discharge the laptop battery at different C-examine the DOD to assess attitudes, in which a battery can be discharged without danger. We will also observe how deep discharges can affect the life expectancy of a battery.

What is the C-rate?

The charging and discharging of a battery is known as the C-coefficient. Most portable batteries are set to 1C. This means that a Dell laptop battery with 1000mAh can submit a current of 1000mA for one hour, when the coefficient is 1C. If the same battery is discharged at 0.5 C, they are at 500mA from 2 hours. At 2C, the 1000mAh battery delivers 2000mA for 30 minutes. 1C is often referred to as 1-hour discharge, a 0.5 C would mean a 2-hour, and a 0.1 C, a 10-hour discharge.

The capacity of a Toshiba PA3535U-1BRS battery is usually measured with a battery analyzer. If the declaration is made for the capacity of the analyzer in percent of rated capacity, 100% would be shown if a 1000mAh battery can deliver this current for 1 hour. If the battery lasts only 30 minutes until shutdown is displayed 50%. A new battery sometimes provides more than 100%.

If a battery is discharged with an analyzer that is capable of using various Entladekoeffizienten C, higher capacitance values are observed when the Toshiba PA3400U-1BRS battery is discharged with a lower C-coefficients and vice versa. When unloading a 1000mAh battery at 2C, i.e. 2000mA, the analyzer is programmed so that he takes the full capacity within 30 minutes. Theoretically, the capacitance measurement should be the same as at a slower discharge, since the same energy is collected only in a shorter time. Due to internal energy losses and a voltage reduction, the battery will quickly reach the lower Spannungsabschalteschwelle and capacity measurement may therefore fall to around 95%. A discharge the same battery of 0.5 C, i.e. 500mA, while 2 hours can increase the capacity resulting measurement of approximately 105%. The differences in the capacity measurements with different C-coefficients have a relationship with the internal resistance of the battery.

A Toshiba PA3421U-1BRS battery that at 1C discharge is not working well, is the portable sealed lead-acid battery. To get a reasonably good capacity measurement, the manufacturers usually recommend one of these batteries Entladekoeffizienten of 0.05 C ie 20 hours. Even at such a slow discharge, it is difficult to reach a capacity of 100%. As compensation for the various measurements at several discharge currents, manufacturers offer a so-called capacity balancing. The capacity compensation is used to correct the reading of the capacity value. He in no way increases the battery life, it corrects only the capacity calculation when using smaller or larger C-coefficients than those that are specified by the manufacturer.

Lithium-Ion/Polymer Toshiba PA3591U-1BRS batteries are electronically protected against high discharge. Depending on the battery model, the discharge current is limited between 1C and 2C. This protective measure will cause lithium-ion batteries for biomedical applications and tools that have a high inrush current that can not be used.

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The charging of lithium-ion batteries A

March 24th, 2010

There is only one kind of charge, lithium-based laptop battery. Can extend the so-called ‘miracle-loading devices’, which, as is said to produce batteries and their life expectancy, does not exist for the lithium chemistry. No one can administer one Superschnellladung. The manufacturers of lithium-ion cells have very strict guidelines for the loading procedure and the batteries need to be treated with the appropriate regulations.

Lithium-ion are easy to maintain and use any preparations, as in the nickel-based Dell latitude D600 battery, the case is. The first charge is the same as the fifth and the fiftieth. The instructions require a new battery for 8 more hours to take off and land, may lead to nickel-based batteries back.

Most cells are charged to 4.20 volts, with a tolerance of + / -0.05 V / cell. A charge of only 4.10 Volt reduced the capacity by 10%, but results in a greater life expectancy. Newer Dell Latitude D510 Battery cells are now in a position to achieve, even with a charge to 4.20 volts per cell for a good number of charge cycles. In Figure 1 are voltage and current waveform shown a lithium-ion cell during a charging process.

Figure 1: Charging a lithium-ion battery .. Increasing the charge current in a charger for lithium-ion Dell Latitude D520 Battery, can not significantly shorten the charging time. Although the peak voltage is fast enough with a higher current, the full charge takes more time.

The charging time of most chargers is about 3 hours. Smaller Dell Latitude D610 Battery, as used for mobile phones, can be charged with 1C, the larger cells 18650 I need for laptop computers, should be consistent with 0.8c or less loaded. The efficiency of the charge is 99.9% and the battery remains cool during charging. The full charge is reached when the voltage threshold is reached and the current has fallen to 3% of set value, or approximate.

A maximize the charge current reduces the loading time but barely. Although the peak voltage is reached faster with a higher charge current, reaching the full charge lasts longer.

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What is the best battery

March 22nd, 2010

Battery newcomers boast of miracles batteries which were running very high energy density, process 1000 charge / discharge cycles and are paper thin. Such properties are certainly achievable, but not in one and the same laptop battery.

A certain battery may be built for small size and big performance, but this Dell Inspiron 1501 Battery is a highly limited life expectancy. Another battery may be constructed for long life expectancy, but it is thick and bulky. A third battery can have a high energy density and long life expectancy, but it is prohibitively expensive for the consumer.

Battery manufacturers know customers’ needs and offer batteries that meet these requirements best. The mobile phone industry is an example of this clever adaptation to the market. Here, have small dimensions and high energy density compared to the advantage of long life expectancy. Short life expectancy here is not a problem because the devices are replaced before the Dell Inspiron 6400 Battery is worn out.

Let’s look at different battery types, beginning with nickel-metal hydride. The cylindrical nickel-metal hydride batteries have an average energy density of 80Wh/kg and allow an estimated 400 cycles. The prismatic nickel-metal hydride Dell Inspiron 640m Battery is designed for slim geometry and agreed energy density and number of cycles. The battery is estimated to be moderate 60Wh/kg and offers approximately 300 cycles. Especially long-lasting nickel-metal hydride batteries for industrial purposes are constructed as cylindrical cells and revealed modest 70Wh/kg, but are designed for approximately 1000 cycles.

Lithium-ion batteries can be built for different energy densities in a similar manner. To pack more energy in a cell at the expense of safety. While commercial lithium-ion Dell Inspiron 1420 Battery have good security, which are super-high-capacity lithium-ion batteries for safety reasons not made available to the general public.

The following is a summary of the strengths and limitations of today’s popular batteries. Although the energy density has the priority, there are also some other important issues such as life expectancy, charge characteristics, maintenance expenses, self-discharge and operational costs. Since nickel-cadmium Dell Latitude D830 Battery are still considered to be standard for comparisons, we will evaluate different chemistries against this classic battery type.

Nickel-cadmium — mature, but has only moderate energy density. Nickel-cadmium is used where emphasis is placed on a long life expectancy, large Entladekoeffizienten and wide temperature range. Important applications include radios, medical equipment and tools. Nickel-cadmium containing toxic metals.

Nickel-metal hydride — offers a greater energy density than nickel-cadmium, but has a shorter life expectancy. Does not contain any toxic metallic Sunstanzen. Applications include wireless telephones and laptop computers.

Lead Acid — cheapest solution for larger installations, where the weight does not matter. Lead-acid Inspiron E1505 Battery is mainly used in hospitals, for wheelchairs, emergency power and lighting unterbruchsichere meals.

— Lithium-Ion batteries with the greatest growth potential. Offer high energy density with low weight. Protection circuits are needed to limit voltage and current for safety reasons. Applications include notebook computers and cellular phones.

Lithium-polymer — Similar to lithium-ion, Dell Latitude D520 Battery , slim build, this system allows in a simple construction, but at higher cost for watt-hours. Main applications are cellular phones.

-Reusable alkaline batteries — your limited number of charge cycles and the low charging current to be compensated by a long shelf life, which makes the battery for portable entertainment devices and flashlights ideal.

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The temperature affection for different battery

March 3rd, 2010

The temperature affection for different battery

Nickel-metal hydrides are less tolerant than nickel-cadmium in terms of the charge at low or high temperatures.

Nickel-metal-hydride can not load quickly at temperatures below 10 ° C, nor can they load slowly below 0 ° C. Some chargers are designed so that they Ladekoeffizienten and the ambient temperature change. Price considerations are not allowed to provide Apple PowerBook G4 12 inch Battery battery chargers for consumer electronics with temperature sensors.

At higher temperatures, the charge acceptance of nickel-based Apple PowerBook G4 Battery is drastically reduced. A battery that can hold at room temperature, a medium capacity of 100%, starts at 45 ° C ambient temperature, only 70%, and even only 45% at a temperature of 60 ° C. This highlights the poor performance of some car chargers in the summer!

Lithium-ion Apple PowerBook G4 15 inch (aluminum) Battery provide a good charging in to deep as well at high temperatures. Some cells allow charging with 1.0 C from 0 ° C to 45 ° C. Most lithium-ion cells, however, prefer a lower charge current when the temperature at 5 ° C or falls below. Must be dispensed on the loading below the freezing point, as a coating can be effected by lithium metal.

The lead-acid Apple PowerBook G4 17 inch Battery is not very sensitive to extreme temperatures, as we all know, on the basis of experience with our car batteries. Part of this tolerance is the inertia of lead-acid systems are attributed. Some battery models allow a shop below the freezing point with a small charging current, while others are damaged, and provide only reduced capacitance values, and life expectancy is shortened.

To improve the loading performance of lead-acid Apple PowerBook G4 17 inch Battery at low temperatures and prevent thermal effects during the warm-up, it is important to monitor the charging voltage limits to be set. An installation of this measure can extend the life expectancy of a battery up to 15%. General guidelines recommend making a correction of about 3mV per cell per degree Celsius. The voltage correction has a negative coefficient, ie The threshold voltage decreases when the temperature rises.

Heat kills the Apple MacBook Pro 17 inch Battery! The warmer the cells shorten, the life expectancy. Higher temperatures may not always be foreseen, especially during a fast charge. It must, however, attempt to keep these periods as short as possible. While 45 ° C is temporarily tolerable, begin a battery from 50 ° C damage is increasing. Moreover, cells are warmer in the interior of a battery, always a few degrees when the temperature of the battery case.

Ultra Fast Chargers

Some manufacturers of chargers promise amazingly short loading time of 30 minutes or less. With well-balanced cells and moderate temperature can nickel-cadmium VGP-BPS10 s batteries, which are designed for fast charging, are being charged in a very short time. This is achieved with a simple increase of the charging current during the first 70% of the charge cycle.

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