What is Cause of Lithium Polymer Battery Swelling

• The cell is overcharged or over discharged , both will cause the electrolyte to decompose.
• High temperature will lead to electrolyte decomposition. You will find severe swelling, the internal resistance of the battery increases, little electrolyte can be seen, as well as the storage temperature or working temperature is much higher than standard working temperature
• The aluminum-plastic film of the cell is damaged and can be found electrolyte decomposition
• The internal short circuit of the battery
• The external short circuit of the battery, when it happened, nickel tab has burnt and the diaphragm is severely shrunk
• Poor edge sealing of the cell leads to leakage