Aging and Safety in Cylindrical Cells

Aging due to cycle life refers to all the degradation processes associated with the charge and discharge processes. Every time a Li-ion cell is cycled, its capacity reduces in an imperceptible way. In the long-term cycling, the cell loses a significant amount of its initial capacity. The rate of capacity loss depends upon multiple factors like operating temperature, cycling protocol, C-rate, and the charge/discharge cut-off voltages. Determining the actual state of health of the cells after cycling is essential for recycling or repurposing them in secondary-use applications.

Cycle life aging data for cylindrical cells and modules. 
The 18650 cell has graphite as anode and nickel-cobalt-aluminum oxide (NCA) as cathode active materials.
Module has a 3P9S (3 cells in parallel (bank), 9 banks in series) configuration. 

Data Repositories

1. Cycle Life Aging Test - Cylindrical Cell - Part 01 - Single Cells
   • Link: https://zenodo.org/record/7658813#.Y_aIQ3ZMGiM  
   • DOI: 10.5281/zenodo.7658812
   • Number of Samples: 21. 
      
2. Cycle Life Aging Test - Cylindrical Cell - Part 02 - Modules
   • Link: https://zenodo.org/record/7658825#.Y_aI6nZMGiM
   • DOI: 10.5281/zenodo.7658824
   • Number of Samples: 2

References

The aging data for cylindrical single cells and modules were published in the following journal publications:

• Degradation-Safety Analytics in Lithium-Ion Cells: Part I. Aging under Charge/Discharge Cycling  
• Degradation-Safety Analytics in Lithium-Ion Cells and Modules Part II. Overcharge and External Short Circuit Scenarios