Do you know why lithium batteries catch fire?

When the lithium battery is charging, the voltage is rising. The positive and negative poles become extremely strong redox state, therefore, materials are easily not stabilization.

(1) charge.In excess of the prescribed time of charging is called "charge", because of battery fever and electrolyte combustible gases.Generally speaking, in the internal of charging the battery, first in the electrolyte and the cathode reduction reaction, and then the thermal decomposition of the electrolyte "between the electrolyte and the anode

"Negative thermal decomposition of the anode oxidation decomposition of pyrolysis" finally caused by isolation plate melt flow internal short circuit.

The positive: by electrolytic oxidation "the destruction of the crystal structure and fever.

Negative: the precipitation of metal lithium.

(2) after discharge.Too discharge is called "discharge", and "charging" fever.

The positive: liquation of cobalt.

Negative: liquation of collector body (copper).

In a word, in either case, make with fever electrode, electrolyte, fused isolation plate, lead to internal short circuit.At this point the joule heat spread everywhere, eventually encounter flammable electrolytes (or can be produced

Burning gas) on fire.

When externally heated by fire, inside the battery, the anode material, electrolyte and cathode materials and produce fever reaction alone.Electrode short circuit isolation plate melt, and the joule heat began to spread.

In addition, due to external shocks, the electrode of insulators and isolation plate breakage at the time, though not on fire, but the charge will happen in the internal short circuit and fire.

Due to their high energy density, short circuit temperature rise sharply, the electrolyte into organic solvent, easy to catch fire.

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