Case - EV battery | Cell polarity vision

Customer background

A battery-module plant with a fixed cell polarity SOP. Reverse polarity can short and ignite. Human eyes misread poles, and there is no record when an incident happens.

It is a core lithium safety step. Manual cell-by-cell checks cannot match high-speed takt or stay consistent. AI polarity check with a full trail was required.

Pain points

Polarity mix-ups are a major safety risk

Poles look similar. Reverse polarity can short and ignite.

No inspection record, hard to assign safety liability

No video or data. Incidents cannot pin operator or lot.

Manual checks cannot match takt

Cell-by-cell eyes cannot keep up. Consistency suffers and takt is blocked.

Solution

Cell-specific AI reads polarity layout. Reverse polarity triggers sound/light and blocks the module. Daily miss-build counts, NG rate and hot stations are stored with all images.

Follow battery assembly SOP

AI detects polarity mix-ups

Speed matches high-speed lithium lines. Frame-by-frame polarity checks beat human eyes. Every module keeps image, result and timestamp for safety compliance and full-chain quality. Avoid batch accidents, scrap and rework—raise inherent safety of battery assembly.