Lithium Ion Polymer Cell Voltage

Types of lithium ion batteries.

Lithium ion polymer cell voltage.

100 original lg chem n2 1 3 7v 60ah polymer lipo lithium ion battery cell. Citation needed design origin and terminology. Lithium ion polymer has its market niche in wafer thin geometries like batteries used in credit cards coupled with other similar applications. Lithium ion cells are susceptible to stress by voltage ranges outside of safe ones between 2 5 and 3 65 4 1 4 2 or 4 35v depending on the components of the cell.

Lipo cells follow the history of lithium ion and lithium metal cells which underwent extensive research during the 1980s reaching a significant milestone with sony s first commercial cylindrical li ion cell in 1991. The nominal cell voltage of 3 60v can directly power mobile phones tablets and digital cameras offering simplifications and cost reductions over multi cell designs. Lithium polymer cells have evolved from lithium ion and. Li polymer battery are made of soft aluminum plastics compound packaging internal is half solid polymers discharge stability high efficiency the internal resistance small safety performance is better and has.

For example almost all lithium polymer batteries are 3 7v or 4 2v batteries. Exceeding this voltage range results in premature aging and in safety risks due to the reactive components in the cells. What this means is that the maximum voltage of the cell is 4 2v and that the nominal average voltage is 3 7v. Some cell manufacturers mark their li ion as 3 70v cell or higher.

As the battery is used the voltage will drop lower and lower until the minimum which is around 3 0v. 3 the lithium polymer battery should be charged in a safe manner and never overcharged or overdischarged. The lithium ion cells offer a nominal voltage that is pegged at 3 7 volts. 1 do not short circuit and do not overcharge lithium ion polymer cells.

After that other packaging forms evolved including the flat pouch format. The drawbacks are the need for protection circuits to prevent abuse as well as high price. If you take a look at your laptop battery you will see that it offers 11 1v which is equivalent to 3 7v. The nominal voltage of lithium ion is 3 60v cell.

2 do not over discharge dent crush or burn the lithium polymer cells. 4 do not try to solder directly to lithium polymer batteries. This offers a marketing advantage because the higher voltage boosts the watt hours on paper voltage multiplied by current equals watts. The cells use for electric bike bicycle tools solar project don t use for ev system.

The lithium ion polymer cells used in th is study were eig eplb c020 lithium nickel manganese cobalt oxide based catho de and graphite based anode with 3 6 v nominal voltage and 20 ah.