Meaning
Protective containment structures isolate the electrochemical environment from the external atmosphere and mechanical impact. Various formats of cell packaging provide the necessary hermetic seal to prevent moisture ingress and electrolyte evaporation. Rigid steel and aluminum cans offer structural support for high pressure internal events.
Sealing Mechanism
Reliable closure techniques ensure the long term integrity of the internal chemistry. Polymeric gaskets or laser welding create the barrier in cell packaging to withstand years of thermal cycling. Leakage leads to immediate performance loss and potential safety risks through hydrofluoric acid formation.
Mechanical crimping remains a standard for cylindrical formats. The durability of these seals determines the shelf life of the product in diverse climates.
Volume Efficiency
Space utilization determines the energy density of the finished battery pack. Prismatic and pouch variations of cell packaging minimize wasted volume compared to cylindrical designs. Efficient layout reduces the overhead mass of inactive materials.
Chemical Compatibility
Alloys used in the inner surface resist the corrosive effects of the electrolyte and salt concentrations. Materials used in cell packaging must remain electrochemically inactive at the operating voltages of the anode and cathode. Stainless steel alloys provide the chemical stability required for high voltage applications.
