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Cylindrical lithium-ion rechargeable batteries Views [10] Published: 2017-08-04 11:24:09

Lithium-ion rechargeable batteries are generally not interchangeable with primary types using different chemistry, although certain sizes of lithium primary cells do have lithium-ion rechargeable equivalents. Most rechargeable cylindrical cells use a chemistry with a nominal voltage around 3.7 volts, but LiFePO
 cells produce only 3.2 volts.

Lithium-ion cells are made in various sizes, often assembled into packs for portable equipment.Many types are also available with an internal protection circuit to prevent over-discharge and short-circuit damage. This can increase their physical length; for example, an 18650 is around 65 mm (2.6 in) long, but may be around 68 mm (2.7 in) long with an internal protection circuit. Safe and economic recharging requires use of chargers specified for these cells. Popular applications include laptop battery packs, electronic cigarettesflashlightselectric vehicles, and cordless power tools.

Commonly-used designation numbers indicate the physical dimensions of the cylindrical cell, in a way similar to the system used for lithium button primary cells. The larger rechargeable cells are typically assigned five-digit numbers, where the first two digits are the (approximate) diameter in millimeters, followed by the last three digits indicating the (approximate) height in tenths of millimeters.

Rechargeable battery packs applications