rechargeable battery

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A battery is an electric storage device, which can come in a variety of shape, size, voltage and capacity, and translate chemical energy into electricity and is an efficient way to make electricity portable. When two materials (often dissimilar metals) are immersed in a solution (electrolyte) they conduct electricity, between the "plates" causing an electrical potential. Examples are: lead acid, nickel cadmium, lithium, silver alkaline, etc.

Lithium Battery is "general name" that battery uses lithium metal or lithium aluminum alloy etc in its negative electrode (Anode). lithium battery have high energy density, high voltage and other benefits

A rechargeable battery use solid polymer as electrolyte. Most Lithium polymer batteries require heat to promote conductivity. the Lithium ions inside the battery transfer between the positive electrode and the negative electrode during charge or discharge, namely Rocking Chair Batteries (RCB).

The Li-Ion cell should never be allowed to drop below about 2.4V, or an internal chemical reaction will occur where one of the battery electrodes can oxidize (corrode) through a processwhich can not be reversed by recharging. A similar process will occur if an Li-Ion cell is charged to too high of a voltage. If current is continually forced into a fully charged cell, internal corrosion can take place which willreduce cell capacity

LI-ION: HOW CELLS ARE DAMAGEDThe biggest problem with the Li-Ion battery is the ease with which it can be damagedduring use:The Li-Ion battery carries a very large amount of energy in a small package. Combinedwith the fact that the internal resistance is fairly high, you have the potential for a verydangerous product: If the cell is accidentally shorted, it could get hot enough to burn auser (and possibly explode).

REFERENCES• Ormond, Tom. Rechargeable Batteries. EDN Magazine, Dec. 8, 1988.• 2. Harrison, Michael. Rechargeable Batteries Are Included. Powertechnics Magazine, May 1988.• 3. Baay, David. Nickel-Cadmium Batteries. Electronic Products, December 1988.• 4. Costello, John. Choosing the Right Battery to Power the Portable Product. Electronic Products,• December 1992.• 5. Small, Charles. Nickel-Hydride Cells Avert Environmental Headaches. EDN Magazine, December• 1992.• 6. Panasonic Corp. Nickel Cadmium Batteries Technical Handbook. • 7. Sanyo Corp. Rechargeable Nickel Cadmium Batteries, Engineering Databook.• 8. Matusita Battery Industrial Co.,Ltd. Development of Lithium Ion Rechargeable Battery .• 9. Sanyo Energy (USA) Corp., Sanyo: Lithium Ion Battery.• http://images.google.com/imgres?imgurl=http://www.gaston-narada.com/images/tech-liion.gif&imgrefurl=http://www.gaston-

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