How to Make Cylindrical Cell
Step 1: Electrode Sheet Preparation
Use furnace to sinter raw
cathode active material and anode active material. Use
milling machine to mill materials into smaller-sized particles.
Mix active, conductive and
binder material into paste under vacuum using mixer.
coater to coat paste onto current collector to create electrode.
heater to dry the newly-created electrodes. Use the
rolling press (calendar) to roll the electrode to required thickness.
Step 2: Li-ion Cell Assembly
Slitting Machine to slice electrode sheet into strips. Weld current collector and tab together using
Ultrasonic Welding Machine. Use
Winding Machine to wind strips of Anode, Separator and Cathode into cell core.
Short-Circuit Detector to test the cell’s integrity.
Dry the cell using a
Step 3: Formation & Sealing of Battery Case
Deep Spot Welding Machine to weld one tab from the cell to the bottom of the closing end inside cylinder case.
After inserting the cell core, use
Grooving Machine to groove cell case and fix location of battery core for later sealing.
Welding Machine to weld the other tab from the cell to the cap.
Fill the case with electrolyte in vacuum/globe box using
Electrolyte Filling System.
Insert & align the cap to open end of case and seal the opening using
Sealing Machine inside glove box.
Battery Analyzer, charge and discharge the assembled battery to activate the cell.
Wrap the case with heat-shrinkable PVC for isolation of positive & negative terminals.
Step 4: Battery Testing
Test the newly-created battery’s performance using a
Battery Analyzer. Use an
Impedance Tester to measure the battery’s internal resistance.