Plotting delta V or cell mass can be a useful way to quickly analyze and extract useful information.
Suppose you produced 1000 cells split across multiple batches in the last week, and you want to inspect if you have a self-discharge issue. One common way to accomplish this is to have each cell that goes through the production process have its delta V value measured, recorded, and stored as a metadata value. Then, you can visualize how this metadata value is distributed across each batch.
In the above box plot, it's clear that the fifth batch, 231115-5, has much higher delta V values and is a good candidate for investigating self-discharge.
Another way to visualize this data is to plot each batch as a distribution in a histogram. This makes it visually apparent where the tail is.
This example uses delta V, but this analysis can be done with any metadata. Some other common examples are cell mass, initial OCV, impedance, electrode thickness, and more.
Try it yourself:
- Select some data that has associated metadata. (Don't have metadata? Send an email to support@voltaiq.com and we can help you get your metadata into the platform!)
- Select 'Box Plot' under 'Widget Type'
- Under 'Metrics', select a data type of 'Device Attribute'
- Choose your favorite Device Attribute, and hit 'Add'.
- Click the generate button!