1. Overcharging and overdischarging issues when using lithium batteries. When using lithium batteries, a violent reaction similar to a short circuit occurs inside the battery, generating a large amount of heat, which in turn causes the problem. the electrolyte breaks down and vaporizes, causing the battery to swell.
2. The violent reaction of the short circuit generates a large amount of heat, which causes the electrolyte to decompose and vaporize, and the battery to swell.
3. Additionally, the lithium battery will swell if not used for a long time, because air is conductive to a certain extent. Therefore, if left too long, it is equivalent. upon direct contact between the positive and negative electrodes of the battery, a chronic short circuit has occurred.