Lithium Ion Polymer Cell Voltage

Types of lithium ion batteries.

Lithium ion polymer cell voltage. For example almost all lithium polymer batteries are 3 7v or 4 2v batteries. What this means is that the maximum voltage of the cell is 4 2v and that the nominal average voltage is 3 7v. 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. 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.

3 the lithium polymer battery should be charged in a safe manner and never overcharged or overdischarged. The cells use for electric bike bicycle tools solar project don t use for ev system. 2 do not over discharge dent crush or burn the lithium polymer cells. Lithium ion polymer has its market niche in wafer thin geometries like batteries used in credit cards coupled with other similar applications.

1 do not short circuit and do not overcharge lithium ion polymer cells. High voltage batteries have only just begun to be used in large scale. 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 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.

This offers a marketing advantage because the higher voltage boosts the watt hours on paper voltage multiplied by current equals watts. The lithium ion cells offer a nominal voltage that is pegged at 3 7 volts. The nominal voltage of normal voltage cells is at 3 6 3 7v while the nominal voltage of high voltage cells is at 3 8v or 3 85v. Lithium polymer cells have evolved from lithium ion and.

4 do not try to solder directly to lithium polymer batteries. Citation needed design origin and terminology. The nominal voltage of lithium ion is 3 60v cell. If you take a look at your laptop battery you will see that it offers 11 1v which is equivalent to 3 7v.

Exceeding this voltage range results in premature aging and in safety risks due to the reactive components in the cells. The drawbacks are the need for protection circuits to prevent abuse as well as high price. As the battery is used the voltage will drop lower and lower until the minimum which is around 3 0v. After that other packaging forms evolved including the flat pouch format.

Lithium ion polymer lipo battery cells with normal voltages are fully charged at 4 2v while high voltage cells are at 4 35v.