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Battery Comparison Between Lithium, NiMh, NiCd, LiPo, Lead

This is a discussion on Batteries: Comparison Lithium, NiMh, NiCd, LiPo Batteries Lead on the board of the Analog Design category; Lately I’ve been studying a bit about batteries and found some information that may be interesting.

Lately I’ve been studying a bit about batteries and found some information that may be of interest when deciding on one technology or another:
- NiCd: They have a ‘moderate’ energy density. Used in applications where battery life, high discharge rate, and a wide range of temperature are important factors. They contain toxic metals.
- NiMH: They have a higher energy density than NiCd batteries. But this is not free because his life is therefore shorter. They contain toxic metals and have been widely used in mobile phones, laptops, etc.. to be almost replaced in its main applications for lithium ion batteries.

- Lead-acid (Lead): These are the most economical and are suitable for applications where a lot of energy and weight is not a problem. It is an extended option for wheelchairs, as a source for uninterruptible power supplies (UPS / UPS), emergency lights.
- Li-Ion: They offer high energy density and low weight. Require a protection circuit to limit current and voltage for safety reasons. Widespread in mobile phones and laptops having contributed significantly to reduce its weight. This technology has also enabled the development of high discharge batteries for applications requiring a lot of energy in a short period of time or medical applications.

The picture above provides a comparison of different technologies. Lithium batteries are divided into 3 subcategories cobalt being the most widespread in cameras, phones, laptops. The Li-Po batteries are not already exhibiting a behavior almost identical to those of Li-ion cobalt.

The internal resistance of a battery pack varies with consumption, and wiring the same number of cells. In the case of Li-Ion batteries also influences the circuit they protect. Based on size cells 18650. The size and design determines internal resistance. Larger cells have an impedance of less than 15 mOhms. Life cycle based on a normal battery maintenance. If not applied full discharge cycle periods can reduce the number of life cycles in a factor of 3.

Life cycle based on the level of discharge. The more you run the battery the worse the effect on its duration. The self-discharge is higher immediately after the load. The capacity loss in NiCd batteries is 10% during the first 24 hours and then drops to 10% every 30 days. At higher temperatures, increases the self-discharge. Internal protection circuits typically consume 3% per month of the stored energy.

The nominal voltage is 1.25V traditional, more commonly used 1.2V as 3 in series correspond to the nominal voltage of the Li-Ion battery (3.6V) The voltage of the Li-Ion batteries are usually placed above the nominal 3.6V. It is based on the average voltage when no load. Capable of delivering high current pulses shaped. Recovery time. Applies only to download. It offers less capacity the lower the temperature. Maintenance can be matching or limiting loads to prevent sulfate.

i-ion batteries in a life cycle in general can be 300 to 500 times charge-discharge. So many people think that, as long as using less battery, so that you can to a certain extent, played a role in extending battery life. But they did ignore the original Dell Inspiron E1705 Battery that the physical nature of the end when the battery off the assembly line, it’s internal life, the clock will then start walking.

So even if you do not set aside the battery, lithium Dell Latitude D510 Battery life was only two to three years you can come to an end of. Battery capacity caused by reasons for the decline was due to oxidation caused by the battery internal resistance increases. When the electrolytic cell resistance reaches a certain point, although this time the battery still be full of electricity, but the battery has been unable to release the stored electricity.

Caused by lithium LIFEBOOK T4010 battery is the speed of this aging temperature and set aside when the charge state of preservation decision. I will give a table to illustrate the different situations of these two factors, the impact on the battery capacity.

Can be seen from the table, high charge state and the high temperature accelerated the decline in Lifebook T4220 battery capacity. Therefore, if possible, as far as possible, after the battery charge to 40% placed in a cool place to save. This allows the preservation of a long period, the battery protection circuit is in its working state. And if the battery is fully charged, will be placed at high temperatures, which will cause great damage to the battery, the table has also been seen, charge 100% in the 60 掳 C environmental conservation, 3 months after the battery capacity fell by 40% .

Therefore, how to save the battery solved the issue, but also leads to another focus of everyone has been argued, that is when we use a fixed power supply when there is a need to remove the Apple A1148 battery? Before the resolution of this question let us first analyze the use of fixed power supply when the battery placed in a computer environment in which … … at this time due to charge notebook computers role in protection circuit, so that the battery remained at 100% of full power state, and this When the battery in which the ambient temperature between 25-30 掳 C, at least, if the hot weather, this temperature will be higher, then from the table, you should be very natural to come to a conclusion that it is so to do this would actually damage the battery, causing a decline in its capacity.

But despite the use of laptop computers, high-temperature will bring damage to the Apple A1175 battery. But Qudiao battery, use only a fixed supply, there will still some danger that dust and moisture will cause some damage to the battery, while the use of notebook computers in order to avoid a sudden power notebook computers may cause damage, so Manufacturers generally warn users not to remove the battery. Of course, this result will be naturally imagined, your battery as often in such a relatively poor environment, it will not be long over, and then you will need to go to repair center to replace the battery, this way, the benefit of course, is a manufacturer.

Finally we spotlight a lithium battery that is exactly how a reasonable charge and discharge this issue. For the lithium battery is best for partial discharge, rather than fully discharged, and to as much as possible to avoid frequent full discharges. Regular Apple A1185 battery too low discharge of the result can only be scrapped so that the battery in advance, because if the battery into every cell of 2.5 volts below the battery’s internal safety circuitry will be switched on, this time the battery will become some bad spent. Therefore, in order to avoid such situations from occurring, do not save the battery power before its release was erased, but rather a number of electric charge in the store before, and again before the first fully charged.

All in all, in order not to make your premature loss of the role of the battery, then the use of normal, you should try to comply with the following principles:

A. avoid full discharge, and often for lithium batteries. The repeated arbitrarily rechargeable lithium Toshiba PA3331U-1BRS battery damage is very small, almost negligible.
B. will need to keep hold of lithium batteries placed in the shade, remember not to put in the refrigerator. Avoid placing hot car, such as a long time to save the battery charge to 40% in place.
C. most of the time if you are using a fixed power supply, please remove the batteries placed in the shade.
D. no need to purchase spare lithium batteries for storage, so this piece is actually a waste of Toshiba PA3356U-3BRSbattery.

Battery is brought to use, as long as the attention to rational use and preservation methods, there is no need to care for their excessive, making it possible for its owners contribute more to performance is the most important.

The article Via Battery blog

Lithium battery market forecast

Li-ion sony vgp-bps2b battery production in mainland China accounted for 16.9% of the world’s

Ireland ResearchandMarkets released a lithium battery market forecast. The company said that at present, including mainland China, Hong Kong and Taiwan, including “Greater China” in lithium battery production is the world’s largest. In the global lithium dell inspiron 1420 battery production, the Chinese mainland accounted for 16.9%, Taiwan 6.9%.

Chinese Journal of Chemistry and Physics of the power industry association said that in 2006 China Li-ion rechargeable battery production of 900 million 50 million. In 2007 is expected to reach 1 billion, increased by 11% over the previous year. The association also predicted that almost all vendors will be in production within the next two years increased by up to 50% with dell inspiron 1501 battery.

In addition, ResearchandMarkets also believe that in the future more companies will start producing lithium-polymer rechargeable battery. Lithium-polymer rechargeable battery and lithium-ion rechargeable battery comparison, the shape can be easily customized, but also has large capacity, high security and so on. Therefore, as the price of lithium-polymer rechargeable batteries gradually reduced to a lithium-ion rechargeable batteries, the price level, lithium-ion dell inspiron 1520 battery are likely to be replaced by lithium polymer batteries.

From the use of point of view, automotive products concern. With high efficiency and low emissions of harmful substances to expand demand for cars, hybrid lithium battery market is expected to form. In addition, the Greater China manufacturers are planning to expand the portable products with a small lithium battery production, the production of such dell inspiron 1521 battery is expected to remain the main force in the coming years.

ResearchandMarkets believe that with the expansion of demand for lithium batteries, the battery will be priced in the coming months decreased by 20 ~ 50%. However, by the first half of 2006 occurred in the Sony battery recall events, a lithium dell inspiron 1525 battery supply will occur short-term tight supply. Thus, at least in the field of notebook computers, lithium batteries will be offset by price declines.