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Battery explosion decomposition - burying missiles in electrolyte

According to renowned American science writer Marshall&midt; According to Brian's analysis in the series of articles on lithium-ion batteries, the vast majority of lithium-ion battery explosions are caused by short circuits, with detailed reasons including charging overvoltage/overcurrent, usage aging, etc.

During the manufacturing process of lithium-ion batteries, due to inherent flaws in the manufacturing process, it is easy to leave metal dust, copper foil, and aluminum foil fragments between the two poles that should have been insulated. When the battery is hot (usually used or charged for a long time), these horn materials, like rice grains in boiling water, make random Thermal motion in the electrolyte. If particles or fragments happen to approach the separator between the positive and negative stages of the battery, it may cause perforation of the separator, leading to a micro short circuit. Due to the flammable nature of the organic electrolyte in the battery, micro short circuits may cause accidents such as explosion and combustion, and there are generally three situations

1. Sparks ignite the electrolyte, causing damage to the plastic body and flammable substances in contact, resulting in a fire; 2. Causes a sudden increase in temperature inside the battery, resulting in a narrow space inside the battery that may explode due to increased pressure; 3. The temperature inside the battery rises slowly, and the battery casing gradually dissolves, causing corrosive electrolyte to leak.

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