1), high voltage, single battery voltage up to 3.6-3.9V, are Ni-Cd, Ni-H batteries 3 times

2), specific energy, and the current to achieve the actual specific energy for 100-125Wh/kg and 240-300Wh / L (2 times higher than Ni-Cd, 1.5 times higher than Ni-MH), the future as technology development, energy 150Wh/kg and can be as high as 400 Wh / L

3), long cycle life in general can achieve 500 times or even more than 1000 times. For small current discharge of electrical appliances, hp laptop battery  life, doubling the duration of electrical competitiveness.

4), safety performance is good, pollution-free, no memory effect. As the predecessor of Li-ion lithium batteries, due to the formation of lithium dendrite happen easily short-circuit, reducing its application areas: Li-ion does not contain cadmium, lead, mercury such as pollution on the environment has elements: some process (such as sintered type) of Ni-Cd batteries exist a major ills as “memory effect”, has severely constrained the use of batteries, but Li-ion does not exist in this respect.

5), self-discharge of small, full of electricity at room temperature of Li-ion storage a month after the self-discharge rate of about 10%, much lower than Ni-Cd of 25-30%, Ni, MH 30-35%.

6), can quickly charge and discharge, 1C charge are nominal capacity can reach more than 80% of capacity.

7), the work of the high temperature range, the working temperature of -25 ~ 45 ° C, with the electrolyte and cathode of the improvements, expected to be widened to -40 ~ 70 ° C.

Lithium-ion hp f4098a  also exist certain shortcomings, such as:

1), battery costs are relatively high. Mainly reflected in the price of LiCoO2 cathode materials for high-(Co less resources), electrolyte purification system difficulties.

2), should not large current discharge. Because of reasons such as the organic electrolyte system, the battery internal resistance compared with other types of large hp f4809a. And called for a smaller discharge current density, generally in the discharge current 0.5C below, can only be applied to the use of small and medium-sized electrical current.

3), the need to protect the control lines.

A, overcharge protection: hp 367759-001 overcharge cathode structure will undermine the impact of the performance and life expectancy; Overcharge simultaneously so that the electrolyte decomposition, the internal pressure is too high and lead to leakage and other problems; it must be the constant voltage 4.1V-4.2V under charge;

B, have put the protection of: over release of active substances will lead to the resumption of difficulties, they also need to have the protection of control lines.

Abstract: The lithium-ion hp VGP-BPS5 development trends, outlines the lithium-ion battery charge and discharge mechanism of theoretical research situation, summed up as the core technology of the lithium battery positive and negative electrode materials of the existing preparation and recent developments in theory, review the cathode material and anode material for a variety of preparation methods and prospects for development, focusing on the introduction of the current problem and improve the field of development. ]]> http://www.electronics-sources.net/2009/02/27/environmental-advantages-of-lithium-ion-battery/feed/ 14 http://www.electronics-sources.net/2009/01/31/history-of-battery/ http://www.electronics-sources.net/2009/01/31/history-of-battery/#comments Sat, 31 Jan 2009 08:05:00 +0000 admin http://www.electronics-sources.net/?p=32 The modern development of batteries started with the Voltaic pile, invented by the Italian physicist Alessandro Volta in 1800. (An early form of electrochemical battery called the Baghdad Battery may have been used in antiquity.

In 1791, Luigi Galvani published a report on “animal electricity.” He created an electric circuit consisting of two different metals, with one touching a frog’s leg and the other touching both the leg and the first metal, thus closing the circuit. In modern terms, the frog’s leg served as both the electrolyte and the sensor, and the metals served as electrodes. He noticed that even though the frog was dead, its legs would twitch when he touched them with the metals.

Within a year, Volta realized the frog’s moist tissues could be replaced by cardboard soaked in salt water, and the frog’s muscular response could be replaced by another form of electrical detection. He already had studied the electrostatic phenomenon of capacitance, which required measurements of electric charge and of electrical potential (“tension”). Building on this experience, Volta was able to detect electric current through his system, also called a Galvanic cell. The terminal voltage of a cell that is not discharging is called its electromotive force (emf), and has the same unit as electrical potential, named (voltage) and measured in volts, in honor of Volta. In 1800, Volta invented the battery by placing many voltaic cells in series, literally piling them one above the other. This Voltaic pile gave a greatly enhanced net emf for the combination,with a voltage of about 50 volts for a 32-cell pile.In many parts of Europe batteries continue to be called piles.

Volta did not appreciate that the voltage was due to chemical reactions. He thought that his cells were an inexhaustible source of energy,and that the associated chemical effects (e.g. corrosion) were a mere nuisance, rather than an unavoidable consequence of their operation, as Michael Faraday showed in classic studies that yielded the names anions and cations and anode and cathode (1834).According to Faraday, cations (positively charged ions) are attracted to the cathode, and anions (negatively charged ions) are attracted to the anode.

Although early batteries were of great value for experimental purposes, in practice their voltages fluctuated and they could not provide a large current for a sustained period. Later, starting with the Daniell cell in 1836, batteries provided more reliable currents and were adopted by industry for use in stationary devices, particularly in telegraph networks where they were the only practical source of electricity, since electrical distribution networks did not then exist.These wet cells used liquid electrolytes, which were prone to leakage and spillage if not handled correctly. Many used glass jars to hold their components, which made them fragile. These characteristics made wet cells unsuitable for portable appliances. Near the end of the 19th century, the invention of dry cell batteries, which replaced the liquid electrolyte with a paste, made portable electrical devices practical.

Since then, batteries have gained popularity as they became portable and useful for a variety of purposes.According to a 2005 estimate, the worldwide battery industry generates US$48 billion in sales each year,with 6% annual growth.hp f4098a , hp f4809a ,hp 367759-001,hp VGP-BPS5 , hp f4812a ,compaq 319411-001 , presario 2100 battery , presario 2500 battery.