GMB's Lithium Polymer Battery:
is a "solid-state" battery cell in comparison to traditional liquid li-ion batteries. It is a high capacity, featherweight, rechargeable battery superior to the existing rechargeable batteries now on the market. Comparing the voltage, capacity and weight of our Lithium Polymer Battery to NiCd or NiMH cells, and you can see that our LiPo Battery provide more energy per gram than any other battery - up to 4 times the specific energy (Watt hour/Kg) of NiCd or NiMH batteries! One 4 gram LP145 cell can replace a 3 cell 120mAh NiMH battery AT ONE THIRD THE WEIGHT! Lower weight means lower wing loading and slower, smaller, longer flying RC aircraft!
Technology about lithium polymer battery:
The lithium-polymer differentiates itself from conventional battery systems in the type of electrolyte used. The original design, dating back to the 1970s, uses a dry solid polymer electrolyte. This electrolyte resembles a plastic-like film that does not conduct electricity but allows ions exchange (electrically charged atoms or groups of atoms). The polymer electrolyte replaces the traditional porous separator, which is soaked with electrolyte.
The dry polymer design offers simplifications with respect to fabrication, ruggedness, safety and thin-profile geometry. With a cell thickness measuring as little as one millimeter (0.039 inches), equipment designers are left to their own imagination in terms of form, shape and size.
Unfortunately, the dry lithium-polymer suffers from poor conductivity. The internal resistance is too high and cannot deliver the current bursts needed to power modern communication devices and spin up the hard drives of mobile computing equipment. Heating the cell to 60¡ãC (140¡ãF) and higher increases the conductivity, a requirement that is unsuitable for portable applications.
To compromise, some gelled electrolyte has been added. The commercial cells use a separator/ electrolyte membrane prepared from the same traditional porous polyethylene or polypropylene separator filled with a polymer, which gels upon filling with the liquid electrolyte. Thus the commercial lithium-ion polymer cells are very similar in chemistry and materials to their liquid electrolyte counter parts.
Lithium-ion-polymer has not caught on as quickly as some analysts had expected. Its superiority to other systems and low manufacturing costs has not been realized. No improvements in capacity gains are achieved - in fact, the capacity is slightly less than that of the standard lithium-ion battery. Lithium-ion-polymer finds its market niche in wafer-thin geometries, such as batteries for credit cards and other such applications.
Advantages of lithium polymer battery:
Very low profile - batteries resembling the profile of a credit card are feasible.
Flexible form factor - manufacturers are not bound by standard cell formats. With high volume, any reasonable size can be produced economically.
Lightweight - gelled electrolytes enable simplified packaging by eliminating the metal shell.
Improved safety - more resistant to overcharge; less chance for electrolyte leakage.
Application of lithium polymer battery: |
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| BlueTooth |
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Digital camera |
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Mob. Phone |
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PDA |
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MP3 Player |
Mining Lamp |
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| Other applications: Smart Card, Wrist
watch, MD players, etc. |
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