Physics: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 configuration | Anode and Cathode |
| Electronic symbol | |
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An 18650 battery[1] or 1865 cell[2] 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.[3]
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".[4] They are now commonly used in power tools, electric bicycles, laptops, and electric vehicles.[5]
Chemistry
18650 batteries are most commonly lithium-based, although sodium-ion variants are available for purchase.[6] 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
- ↑ August Neverman (12 November 2022). "Everything You Need to Know About the 18650 Battery" (in en). Common Sense Home. https://commonsensehome.com/18650-battery/.
- ↑ Jake Christensen (2022-05-20). "Tesla Tab Talk" (in en). Bosch. https://www.bosch.com/stories/tesla-tab-talk/.
- ↑ Zollo, Bob (19 September 2018). "The Standard 18650 Li-Ion Cell Isn’t Always Standard" (in en). Electronic Design. https://www.electronicdesign.com/technologies/power/article/21807019/the-standard-18650-liion-cell-isnt-always-standard.
- ↑ "Corporate History: 1994" (in en). Panasonic Holdings. https://holdings.panasonic/global/corporate/about/history/chronicle/1994.html.
- ↑ 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" (in en). Journal of the Electrochemical Society 162 (8): A1592. doi:10.1149/2.0721508jes. ISSN 1945-7111. https://iopscience.iop.org/article/10.1149/2.0721508jes/meta.
- ↑ "Sodium Ion 1250 mAh 50A 18650 Rechargeable Battery" (in en-US). https://srikobatteries.com/product/sodium-ion-18650-1250mah-50a-rechargeable-battery/.
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