Dry Pouch Cells with NCM523 + Graphite for Lithium-Ion Battery, 1 pcs/pack, CLIBDPCNCM523G

A Dry Pouch Cell is a lithium-ion battery that has been fully assembled—including the anode, cathode, and separator—but has not yet been injected with liquid electrolyte.

The internal structure is identical to a standard pouch cell but remains "dry" to prevent chemical reactions until the moment of testing. (1) Electrode Stack: A repeating sequence of Cathode (e.g., SPAN on Al foil), Separator, and Anode (e.g., Graphite or Li-metal on Cu foil). (2) Tab Welding: The current collector foils are bundled and ultrasonically welded to aluminum (positive) and nickel/copper (negative) tabs. (3) Pouch Material: A multilayer Aluminum Laminated Film (ALF). The stack is placed inside a pre-formed pouch pocket. (4) Sealing: Three sides are thermally sealed, leaving one side (usually with an "electrolyte pocket" or "gas bag") open for future injection.

Testing Processes:

(1) Electrolyte Filling with recommended amount in glovebox.
(2) First Time Aging: 45°C, aging time ≥ 15h in an oven.
(3) Formation conditions: 45°C, 5 min rest; 0.02C constant current charging (10% theoretical capacity or 5 h); 0.1C constant current charging (30% theoretical capacity, 3 h); 5 min rest; total capacity is 40% or 8 h;
(4) Second Time Aging: 45°C, aging time ≥ 24h in a oven
(5) Battery Analyzer for charging and discharging.

References:

1. Z. Deng, et al., Ultrasonic Scanning to Observe Wetting and “Unwetting” in Li-Ion Pouch Cells, Joule, 2022, 4, 2017-2029. 
2. C. P. Aiken, et al., An Apparatus for the Study of In Situ Gas Evolution in Li-Ion Pouch Cells, J. Electrochem. Soc., 2014, 161, A1548.