The Advantages And Disadvantages of Cylindrical Cell, Prismatic Cell and Pouch Cell
According to the battery shape, currently market mainly has three type lithium-ion battery: Cylindrical, Prismatic and Pouch lithium battery.
Let Bonnen engineer introduce the main features of these three typical lithium batteries.
Cylindrical lithium battery (18650,26650,32650etc):
It has mature automatic production process, high output, good consistency.
Such small battery has large heat dissipation area than prismatic, but a bit complex to form system and comparatively low reliability after system composition.
The main characteristics of prismatic lithium battery: the shell is made of aluminium alloy, stainless steel and other materials, with high structural strength, good mechanical load-bearing capacity. But the heavy shell, which leads to certain restrictions on the energy density of the battery pack.
The processing is complex, the product yield is low, and the consistency is relatively poor.
Some factory also calls this soft battery cell or aluminium-plastic membrane battery.
The main characteristics of it: relatively good safety performance, not the easy explosion, high energy density, good ductility. But high cost, relatively poor mechanical load-bearing capacity, easy to damage and leakage.