Lithium Button Batteries Production

The production process for primary lithium manganese dioxide (Li/MnO₂) coin cells :

Simple Production Process of Primary Li/MnO₂ Coin Cells

Cathode Preparation – Mix MnO₂ powder with conductive additives and binder, coat the mixture onto aluminum mesh, dry, and press into cathode pellets.

Anode Preparation – Cut lithium foil into discs of the required size.

Separator & Electrolyte – Place a porous separator (e.g., polypropylene) between the cathode and anode, then inject a lithium salt‑based organic electrolyte.

Cell Assembly – Stack the cathode, separator, and lithium anode inside a stainless steel coin case. Add a wave spring and gasket for proper contact and sealing.

Crimping (Sealing) – Mechanically crimp the coin cell to form a hermetic seal in a dry, low‑humidity environment (e.g., glove box).

Aging & Testing – Store cells at room temperature for several days to stabilize, then test for open‑circuit voltage, internal resistance, and capacity.

Inspection & Packaging – Visually inspect and sort cells before vacuum packaging for shipment.