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▲ Needling, short circuit, squeezing
When a lithium-ion battery experiences a short circuit, puncture, or compression, it can cause the internal diaphragm to rupture, causing a sudden explosive increase in temperature, ultimately leading to an explosion. Especially for lithium-ion batteries with poor safety performance, this time will be even shorter, usually around 5 seconds before explosion.
▲ Thermal shock
The so-called Thermal shock is the phenomenon that the ambient temperature rises suddenly. If the temperature is high, the SEI film on the negative electrode surface of the lithium ion battery will decompose, which will lead to exothermic reaction. If the heat dissipation of the battery is poor, the internal temperature will rise rapidly, resulting in deflagration.
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