How Much Do You Know Rechargeable Lithium Batteries?
Batteries,have the advantages of having a very low self-discharge rate,virtually no memory effect,and can be recharged hundreds of times during the life of the battery.Rechargeable batteries,unlike the standard ones,can be used and reused multiple times before being disposed of.They have the capability to be charged and discharged repeatedly using a charger device which passes an electric current through the batteries.Electrolytic chemicals with a high degree of active life are present in rechargeable batteries.These chemicals allow the rechargeable battery to be activated and used even after it has been “exhausted” several times.A rechargeable battery’s use is not unlimited;when the active life of the electrolytic chemicals has been completely exhausted,the battery cannot be recharged again.
Self-discharge refers to gradual declining power available from rechargeable batteries while they sit on the shelf.Memory Effect refers to the tendency of rechargeable batteries to have a lower total level of power available as they get older.Neither of these are serious problems with Li-Ion batteries.Due to lithium ion’s generally high energy density and lithium’s inherent volatility,each battery,and even cell,needs a battery management circuit to monitor and control the battery or cell’s upper and lower voltage thresholds during charge and discharge.House of batteries take great care in designing and testing the battery management systems for each rechargeable lithium ion battery pack we assemble to ensure optimal safety and performance.Lithium ion can have up to twice the energy density of NiCd,is capable fairly high discharge currents,and has relatively low self-discharge.
Lithium batteries are perfect for long-term use not only because of their high energy density but also because they have a low rate of self-discharge.So even if the battery is left unused for a long period of time,it does not run the risk of going dead.From the year it is manufactured,a lithium-ion battery loses only 5%-10% of its storage capacity per year.This is why Lithium ion batteries are very ideal to use in laptop computers,cell phones,digital SLR cameras,and particularly in emergency devices like smoke alarms and emergency flashlights.As the technology has advanced many variations of rechargeable lithium ion batteries have been introduced that optimize higher energy,high rate discharge,increased safety,lower cost,or some combination of these attributes.
Depending on the company that produced them,commercial Lithium ion batteries differ from each other based on the different Lithium compound cathodes used.Li-ion batteries of Sony use Lithium Cobalt oxide cathode and a graphite anode.Li-Manganese spinel is the cathode used by other companies like LG,NEC,and Samsung.However,due to the highly volatile electrolytic combination used in Lithium ion batteries,they have a high risk of explosion when they short circuit or overheat.In the case of rechargeable lithium ion batteries,prolonged exposure to direct sunlight can be very dangerous.It is very important that these batteries are purchased only from very reliable manufacturers with very high standards of quality control to ensure that they are safe and reliable.
Lithium Ion (Li-ion) is a increasingly popular technology for rechargeable battery packs that offers better energy density over nickel and lead based chemistries at a price premium.The types of rechargeable batteries vary depending on the electrolytic chemicals that are used.These include Nickel Metal Hydride (nimh batteries),Nickel Cadmium (Ni Cd),Lead acid,and Lithium ion rechargeable batteries.Among all the types,the Lithium ion batteries have the highest energy density rates.This refers to the energy stored in the battery expressed as a function of weight or volume.To compare,a Lithium ion battery has a cell voltage of 3.6 volts,while NiMh and Lead acid batteries typically have cell voltages of 1.2 volts and 2.2 volts,respectively.Consequently,Lithium batteries cost the most among all the other types of rechargeable batteries.
Article From: http://www.batteryfaq.net/battery-news/how-much-do-you-know-rechargeable-lithium-batteries-2-2192.html
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