Most electric vehicle fires occur during charging. This is mainly because the negative electrode material used in most lithium-ion batteries will continue to expand after repeated charging and discharging cycles, reducing the distance between the positive and negative electrodes. This can lead to internal short circuits when the effective insulation distance between the electrodes is shorter than the designed value due to electrode burrs or metallic particles.

Two common problems in battery cell production inspection are low dry cell (jelly roll) insulation test voltage (<350V) and failure to detect electrical flashover that temporarily damages the separator during insulation testing. Addressing these issues, the Chroma 11210 Battery Cell Insulation Tester features an innovative electrical flashover detection technology and a +Flash Test function, which can ensure an effective insulation distance in the lithium-ion battery (dry cell) before electrolyte injection and detect any abnormal leakage.

This can prevent poorly insulated products from entering the end market and is a great tool for improving battery safety and reducing the risk of EV battery fires. Find out more at Chroma's booth.

Booth: 1424