충전용 cell > Li-Polymer

A lithium-iron polymer battery is a rechargeable battery of lithium-ion technology using a polymer electrolyte instead of a liquid one. High conductivity semisolid polymers from this electrolyte. These batteries provide a higher specific energy than other lithium-battery types and are being used in applications, where weight is a critical feature – like table computers, cellular telephone handsets or radio-controlled aircraft.

The voltage of a LiPo cell depends on its chemistry and varies from about 2.7 – 3.0V(discharged) to about 4.20V(fully charged), for cells based on lithium-metal-oxides(such as LiCoO2), and around .8 – 2.0V(discharged) to 3.6 – 3.8V(charged) for those based on lithium-ion-phosphate(LiFePO4).

The exact voltage ratings should be specified in product data sheets, with the understanding that the cells should be protected by an electronic circuit that won’t allow them to overcharge nor over-discharge under use.

For LiPo battery packs with cells connected in series, a specialized charger may monitor the charge on a per-cell basis so that all cells are brought to the same state of charge.