This video explains the basic principles of electrical safety testing. For more information regarding this topic, please feel free to visit https://chroma1.wpengine.com/safety-compliance-test/
Contribution of Capacitance Measurement to the Quality Control of Winding and Stacking in Lithium-ion Battery Cells
Applying a sufficiently high test voltage and detecting electrical flashovers during the test can help to identify defective cells that pose a risk of future internal short circuits (due to partial punctures or perforations in the separator).