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In 1991, the Sony Corporation commercialized the first lithium-ion battery. The energy density of lithium-ion is typically twice that of the standard nickel-cadmium. The load characteristics are reasonably good and behave similarly to nickel-cadmium in terms of discharge.The high cell voltage of 3.6 volts allows battery pack designs with only one cell.
There is no memory and no scheduled cycling is required to prolong the battery's life.These cells come at a higher cost in terms of stored energy.The lithium-polymer differentiates itself from conventional battery systems in the type of electrolyte used.lithium is the lightest of all metals, has the greatest electrochemical potential and provides the largest energy density for weight.Attempts to develop rechargeable lithium batteries failed due to safety problems.The maximum charge and discharge current on most packs are is limited to between 1C and 2C.
With these precautions in place, the possibility of metallic lithium plating occurring due to overcharge is virtually eliminated.
Built into each pack, the protection circuit limits the peak voltage of each cell during charge and prevents the cell voltage from dropping too low on discharge.
In addition, the cell temperature is monitored to prevent temperature extremes.
In addition, the battery should be partially charged during storage. This cell is used for mobile computing and other applications that do not demand ultra-thin geometry.
If a slim pack is required, the prismatic lithium-ion cell is the best choice.
The original design, dating back to the 1970s, uses a dry solid polymer electrolyte.