Process of Manufacturing Pouch 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.
  • Use a coater to coat paste onto current collector to create electrode.
  • Use a 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

Using Stacking Method

  • Use Electrode Mould Cutting Machine to cut electrode out with lead.
  • Use Stacking Machine to stack layers in the following order: Anode > Separator > Cathode > Separator
  • Weld current collector and tab together using Ultrasonic Welding Machine.
  • Use a Short-Circuit Detector to test the cell’s integrity.
  • Dry the cell using a vacuum oven.

Using Winding Method

  • Use Slitting Machine to slice electrode sheet into strips.
  • Use Winding Machine to wind strips in the following order: Anode > Separator > Cathode > Separator
  • Weld current collector and tab together using Ultrasonic Welding Machine.
  • Use a Short-Circuit Detector to test the cell’s integrity.
  • Dry the cell using a vacuum oven.
Step 3: Formation & Sealing of Battery Case
  • Use Cup Forming Machine to punch cup and gas receiver on Aluminum lamination sheet and place cell into cup.
  • After doubling up, seal the appropriate sides using a Top & Side Heat Sealing machine.
  • Use Electrolyte Filling System to fill electrolyte into vacuum/globe box.
  • Seal longer side (where gas receiver is located) using a Vacuum Sealing Machine.
  • Use Battery Analyzer to charge & discharge the cell. This enables battery formation and sends excess gas to gas receiver.
  • Cut off gas receiver and use Vacuum Sealing Machine to finalize sealing on cutting edge under vacuum/glove box.
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.

Working alongside organizations including Electrochemical Society and NAATBatt, we’re focused on helping battery manufacturers commercialize ambitious new energy storage technologies.

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