-
Casing: The top layer with the groove is the outer casing that encloses the battery components. This is typically made of metal and provides structural integrity.
Electrode Layers: Beneath the casing, there are winding layers of electrodes. These are typically:
Cathode: The positive electrode, usually a lithium metal oxide.
Anode: The negative electrode, typically made from graphite.
These layers are often referred to as the “jelly roll.”
Separator: Between the anode and cathode layers is a separator, which is a non-conductive layer that prevents short circuits between the anode and cathode while allowing lithium ions to pass through.Electrolyte: The space within the jelly roll is filled with a liquid electrolyte, which facilitates the movement of lithium ions between the cathode and anode when the battery charges and discharges.
The clear central part appears to be the mandrel around which the electrode materials are wound, giving the battery its cylindrical shape. The precise internal design can vary between manufacturers, but the fundamental components and structure are consistent across most 18650 lithium-ion batteries.
2 years, 2 months ago
