Cylindrical lithium battery is a kind of lithium ion battery, its shape is cylindrical, so it is called cylindrical lithium battery.
casing, cap, positive electrode, negative electrode, separator, electrolyte, PTC element, gasket, safety valve, etc.
Cylindrical lithium-ion cells are usually represented by five digits. Counting from the left, the first and second digits refer to the diameter of the battery, the third and fourth digits refer to the height of the battery, and the fifth digit refers to the circle.
A typical prismatic lithium-ion battery, the important components include: top cover, casing, positive plate, negative plate, laminated sheets or windings composed of separators, insulators, safety components, etc.
Among them, the two in the red circle are safety structures, NSD acupuncture safety device; OSD overcharge protection device.