Potential danger of damaged battery:
Chemical Hazard: Despite of its careful and professional protection
design against any hazard results, rupture of battery may still occur due to
mechanical damage, internal pressure etc., and may result in a leakage of
battery electrolyte. The electrolyte is corrosive and flammable. When there
is fire, the toxic gases produced will cause skin and eyes irritation, and
discomfort after inhalation. Therefore:
1) Do not open damaged batteries;
2) Do not damage the battery again (shock, fall, trample, etc.);
3) Keep damaged batteries away from water (except to prevent an
energy storage system from catching fire);
4) Do not expose the damaged battery to the sun to prevent internal
heating of the battery.
Electrical hazard: The reason of fire and explosion accidents in lithium
batteries is battery explosion. Here are the main factors of battery
explosion:
1) Short circuit of battery. Short circuit will generate high heat inside
battery, resulting in partial electrolyte gasification, which will stretches the
battery shell. The temperature reaching ignition point of internal material will
lead to explosive combustion.
2) Overcharge of battery. Overcharge of battery may precipitate
lithium metal. If the shell is broken, it will come into direct contact with the air,
resulting in combustion. The electrolyte will be ignited at the same time,
resulting in strong flame, rapid expansion of gas and explosion.
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