Use color gradients to visually highlight every 100th cycle
Here are three exciting ways to analyze your cycling data that leverages all the advantages of time-series data, without drowning you in a sea of data.
1. Voltage vs. capacity curve, displayed every 100 cycles
This plot is a great way to visualize how the voltage profile is affected by cycling. Use a color gradient for the trace colors so that it's visually clear which direction the increased cycling is. The large change in the voltage profile between the 401th cycle and the 501th cycle indicates an excellent starting point for further investigation.
To reproduce this plot of voltage vs capacity every 100 cycles:
1. Under Select Data Type, choose Time Series
2. Choose Discharge Capacity for the x-axis, and Potential for the y-axis
3. Under Step Types, choose Constant Current Discharge
4. Under Cycle Selector, choose Interval. Enter in 1 out of every 100, from 1 to 1000.
2. Voltage vs net capacity curve, displayed every 100 cycles
One popular adjustment to the ubiquitous voltage vs. capacity plot is to use current cycle net capacity instead of discharge capacity. The benefit is that it shows the charge and discharge curve of each cycle. In the above plot, it's visually clear that 600th and 800th cycles have dramatically reduced capacity, and that the majority of the charging occurs during the constant voltage step.
To reproduce this plot of voltage vs net capacity every 100 cycles:
1. Under Select Data Type, choose Time Series
2. Choose Current Cycle Net Capacity for the x-axis, and Potential for the y-axis
3. Under Cycle Selector, choose Interval. Enter in 1 out of every 100, from 1 to 1000.
3. dQ/dV, displayed every 100 cycles
dQ/dV is a popular way to visualize how the material changes as the cell is cycled. Use a color gradient to make it visually clear the direction of increased cycling. In this example, the peaks have a rightward shift as the battery cycles. This can be the basis for a nondestructive analysis of material changes inside the cell.
To reproduce this plot of dQ/dV every 100 cycles:
1. Under Select Widget Type, choose Differential Capacity Analysis
2. Input 1 for the dV Threshold Factor
3. Under Cycle Selector, choose Interval. Enter in 1 out of every 100, from 1 to 1000.