Estimation of Cycle Life
- This calculation estimates the cycle life for a cell cycling with a specific columbic efficiency (Option1) for a desired capacity retention and computes the required coulombic efficiency to achieve achieve a target cycle life (Option2).
- Note that the calculation assumes that the coulombic efficiency is maintained throughout the entire cycle. This estimation therefore provides an upper bound on cycle life (Option1) and a lower bound on coulombic efficiency (Option2).
Option 1: Estimate Cycle Number
Coulombic Efficiency (%)
Capacity Retention (%)
Estimation of Li-metal thickness
- This calculation estimates the amount of Li deposition or stripping during charge/discharge reactions depending on the applied areal current density.
- Note that this is theoretical estimation and calculated, assuming Li being perfectly flat and smooth.
Li Areal Capacity [mAh/cm2]
Estimation of Pouch Cell Capacity and Specific Energy
- This page helps estimate the total cell capacity and specific energy of the pouch cell based upon a different stacking type by inputting the cell parameters needed.
- For a certain pouch cell design, this calculation can help determine the number of stack layers and electrolyte amount to achieve target cell capacity and specific energy.
Electrode Parameters
Cathode Parameters
Electrode density (g/cm3)
Electrode thickness [μm]
Active material loading ratio
Practical capacity of active material [mAh/g]
Electrode area [cm2]
Anode Parameters
Electrode density [g/cm3]
Electrode thickness [μm]
Active material loading ratio
Practical capacity of active material [mAh/g]
Electrode area [cm2]
Other Parameters
Al foil thickness [μm]
Cu foil thickness [μm]
Tab area [mm²]
Total seperator weight [g]
Cell Parameters
Type of stacked layer and its unit:
Cell Summary Table
| Parameters | Results |
|---|
Sum of other package weight [g]*1
Nominal cell voltage [V]
Number of stacked layer
Nominal cell voltage [V]
Number of stacked layer
Target Specific Energy [Wh/Kg]*2
*2 If the total cell capacity is insufficient to include the electrolyte weight in the total cell weight to reach the target specific energy, this target specific energy is reset according to EC ratio = 1.3 (g/Ah)(referenced Panasonic 18650B EC ratio).
Estimation of Jelly-roll capacity and required electrode dimension
- This calculator can be used to compute the metrics for the cylindrical cell consisting of a jelly-roll of cathode, anode, and separator sheets.
- This module calculates the electrode length required based on the customized parameters of cell components that fit the cylindrical cell case dimensions.
- By knowing the outer and inner diameters of the cell, the cylindrical cell electrode length and number of windings can be calculated using the Archimedean spiral using polar coordinates using the following equation:
- For the electrode length:
- Number of windings:
where Φ = rotation angle and a = electrode thickness (double-sided cathode thickness + double-sided anode thickness + 2*separator thickness)
Note: cell outer diameter = \(\frac{a}{\pi}\phi_1\) & cell inner diameter = \(\frac{a}{\pi}\phi_0\)
Cathode Parameters
Coating thickness (single-side) (μm)
Al foil thickness (μm)
Discharge capacity of active material (mAh/g)
Density of electrode material (g/cm3)
Active material loading ratio
Estimated porosity
Electrode width (cm)
Other Cell Parameters
Anode coating thickness (Single-side) (μm)
Cu foil thickness (μm)
Separator thickness (μm)
Outer diameter of the cell (mm)
Cell Can thickness (mm)
Inner diameter of the cell (mm)