Li Ion batteries: Difference between revisions
From wikiluntti
| Line 2: | Line 2: | ||
== 1865 / 18650 cells == | == 1865 / 18650 cells == | ||
Diameter is 18 mm and length 65.0 mm. | |||
=== Voltage === | |||
Note that the chemistry changes and thus these value might be a bit different. Be careful. | |||
* Discharge cutoff voltage (the low voltage limit) is around 2.0V to 2.5V | |||
* Nominal voltage is (usual) 3.6 V or 3.7 V. | |||
* Full charge voltage is 4.2 V, which is the maximum voltage | |||
Chenistry: | |||
* Lithium Cobalt Oxide (LiCoO2): nominal voltage of 3.6V and is known for its high energy density. | |||
* Lithium Manganese Oxide (LiMn2O4): a nominal voltage of 3.7V and offer thermal stability compared to LiCoO2 | |||
* Lithium Nickel Manganese Cobalt Oxide (NMC): a nominal voltage of 3.6V or 3.7V and provide a good balance of energy density and power capability. | |||
* Lithium Iron Phosphate (LiFePO4): a nominal voltage of about 3.2V with excellent safety characteristics and long cycle life. | |||
== 21700 cells == | == 21700 cells == | ||
== Spot welding == | == Spot welding == | ||
Revision as of 10:33, 10 August 2025
Introduction
1865 / 18650 cells
Diameter is 18 mm and length 65.0 mm.
Voltage
Note that the chemistry changes and thus these value might be a bit different. Be careful.
- Discharge cutoff voltage (the low voltage limit) is around 2.0V to 2.5V
- Nominal voltage is (usual) 3.6 V or 3.7 V.
- Full charge voltage is 4.2 V, which is the maximum voltage
Chenistry:
- Lithium Cobalt Oxide (LiCoO2): nominal voltage of 3.6V and is known for its high energy density.
- Lithium Manganese Oxide (LiMn2O4): a nominal voltage of 3.7V and offer thermal stability compared to LiCoO2
- Lithium Nickel Manganese Cobalt Oxide (NMC): a nominal voltage of 3.6V or 3.7V and provide a good balance of energy density and power capability.
- Lithium Iron Phosphate (LiFePO4): a nominal voltage of about 3.2V with excellent safety characteristics and long cycle life.
