18650 battery
 Panasonic 18650 batteries inside a laptop. Each cell has a capacity of 2450 mAh. | |
| Type | Power source |
|---|---|
| Working principle | Electrochemical reactions, Electromotive force |
| First production | 1994 |
| Pin names | Anode and Cathode |
| Electronic symbol | |
 | |
A 18650 battery is a cylindrical lithium-ion battery common in electronic devices. The batteries measure 18 mm (0.71 in) in diameter by 65 mm (2.56 in) in length, giving them the name 18650.[1]
Panasonic first developed the 18650 battery in 1994 "when there was a growing need for ever smaller and lighter storage batteries that could be used for ever longer periods of time".[2] They are now commonly used in power tools, electric bicycles, laptops, and electric vehicles.[3]
Chemistry
18650 batteries are most commonly lithium-based, although sodium-ion variants are available for purchase.[4] Lithium-ion batteries consist of an anode, typically made of graphite and a cathode, often of lithium-metal oxide.
Packs
18650 batteries are more commonly used in packs, where a BMS (Battery Management System) is required, especially once cells age and perform differently. BMS boards balance the voltage of cells in series and protect against over- and under-discharge.
See also
References
- ^ Zollo, Bob (2018-09-19). "StackPath". Electronic Design. Retrieved 2023-07-04.
- ^ "Corporate History: 1994". Panasonic Holdings. Retrieved 2023-07-04.
- ^ Muenzel, Valentin; Hollenkamp, Anthony F.; Bhatt, Anand I.; Hoog, Julian de; Brazil, Marcus; Thomas, Doreen A.; Mareels, Iven (2015-05-28). "A Comparative Testing Study of Commercial 18650-Format Lithium-Ion Battery Cells". Journal of the Electrochemical Society. 162 (8): A1592. doi:10.1149/2.0721508jes. ISSN 1945-7111. S2CID 93255496.
- ^ "Sodium Ion 1250 mAh 50A 18650 Rechargeable Battery". SRIKO Batteries | Online store for electronics | Online battery store. Retrieved 2023-10-16.