Lithium Polymer Battery Discharge Curve

Sony s original lithium ion battery used coke as the anode coal product.

Lithium polymer battery discharge curve. A lithium polymer battery or more correctly lithium ion polymer battery abbreviated as lipo lip li poly lithium poly and others is a rechargeable battery of lithium ion technology using a polymer electrolyte instead of a liquid electrolyte. Gsm loads the battery with up to 2a at a pulse rate of 577 micro seconds μs. Lithium iron phosphate or lifepo 4 batteries are an altered lithium ion chemistry which offers the benefits of withstanding more charge discharge cycles while losing some energy density in the. The same applies for hot temperatures a battery s performance will be affected on temperatures exceeding 30ºc 86f.

Since 1997 most li ion manufacturers including sony shifted to graphite to attain a flatter discharge curve. Depending on the design and chemistry of your lithium cell you may see them sold under different nominal voltages. However due to the chemistry of lithium cells there is a possibility of fire if charging is not properly done. Some of our products like heavy duty beacon and card tag use different models of lithium batteries.

High discharge lithium polymer battery is also given a c rate in terms of burst which is the rate at which the battery discharges in a short period of time. For example almost all lithium polymer batteries are 3 7v or 4 2v batteries. When the lithium ion battery with nickel cathode material and graphite anode is used such materials have a sloping discharge curve so that the remaining capacity can be easily indicated like as hard carbon anode battery. High discharge current c rating describes how quickly a battery can be discharged.

You can see the expected discharge curve on the following image. What this means is that the maximum voltage of the cell is 4 2v and that the nominal average voltage is 3 7v as the battery is used the voltage will drop lower and lower until the minimum which. High conductivity semisolid polymers form this electrolyte these batteries provide higher specific energy than other lithium battery types and are. Lithium polymer safety tips.

Graphite is a form of carbon that has long term cycle stability and is used in lead pencils. Lithium polymer cells are a tremendous advance in battery technology for rc use. Gsm global system for mobile communications for a mobile phone is such an example figure 3. A battery may discharge at a steady load of say 0 2c as in a flashlight but many applications demand momentary loads at double and triple the battery s c rating.

A 5000mah lithium polymer battery the burst rate is 5c which means the battery can provide 5 x 5000ma 250000ma 25a current for several seconds.