1. External short circuit of polymer lithium battery, such as a pile of batteries falling to the ground, pole ears overlapped with each other, positive and negative ears clamped on the same side when the battery is on the cabinet, etc.
2. Internal short circuit or micro short circuit in polymer lithium battery, such as: positive and negative electrodes with burrs penetrate the short circuit in contact with the diaphragm paper, the diaphragm paper does not cover the pole piece or just flush with the pole piece, causing short circuit, etc
3. Polar ear breakage of polymer lithium battery
4. The polar ear glue does not expose the packaging film, and the polar ear is connected with the aluminum foil of the intermediate layer of packaging to short-circuit the large-capacity lithium battery.
5. Polymer lithium battery does not turn into charging
The above five points are the possible reasons for the occurrence of zero voltage or low voltage polymer lithium batteries, when this situation, we can carry out one by one screening, to see what is wrong!
