Why is a battery cell is boiling?

A battery cell may appear to be boiling due to excessive heat generation, often caused by overcharging, internal short circuits, or a malfunction in the battery management system. This can lead to electrolyte breakdown and gas release, creating bubbles that resemble boiling. If not addressed, this condition can result in battery swelling, leakage, or even explosion, posing safety hazards. Always handle batteries carefully and seek professional help if you notice abnormal behavior.