Why do lithium-ion batteries explode?

[MacMiguel]

Reasons for lithium-ion battery explosions: 1. Thermal runaway: If a lithium battery overheats, it can catch fire and explode; 2. Separator damage: Lithium batteries have internal separators. If the separator is damaged, the positive and negative electrodes will come into direct contact, causing a short circuit, which can lead to an instant battery explosion. Precautions for using lithium-ion batteries: 1. Do not bend the battery or puncture it; 2. When charging, avoid overcharging, and ensure the voltage and current do not exceed specified values; 3. Use the original charger when charging. Types of car batteries include nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries, lithium-polymer batteries, and lead-acid batteries.

[DiCora]

I've done quite a bit of research on lithium-ion battery explosions, which are primarily caused by thermal runaway. Simply put, when the battery overheats internally, the chemical reactions become uncontrollable, generating a large amount of heat and gas that ruptures the casing. Common causes include overcharging, such as when the charger malfunctions or the voltage is too high, or over-discharging, which destabilizes the battery. Physical damage is also a major issue, like punctures or compression causing internal short circuits. Manufacturing defects, such as impurities or poorly sealed separators, can also trigger explosions. I once watched an experiment video where a battery instantly caught fire after being punctured by a hard object. So, to avoid these problems, use good charging equipment and avoid storing batteries in high-temperature environments.

[StZachary]

I've used many electronic devices and encountered battery issues. The risk of explosion is indeed terrifying. It's mainly caused by daily misuse, such as charging in a hot car where the battery overheats and becomes uncontrollable. Or overcharging leads to excessively high voltage, and internal short circuits caused by structural issues trigger combustion. Personally, I once had an old phone battery swell up and nearly explode because it was charged for too long. Physical impacts like dropping can also cause leaks of flammable materials. These explosions aren't instantaneous but result from accumulated gas pressure bursting. I recommend replacing old batteries promptly and avoiding cheap, off-brand options to save money.

[VictoriaLee]

From a safety perspective, lithium-ion battery explosions pose significant hazards, as they can easily catch fire and injure people. The primary causes include thermal runaway, short circuits, overcharging, and physical damage. For instance, if the separator is damaged, the positive and negative electrodes may directly contact each other, leading to intense heat generation, violent reactions, and potential explosions. Children should be educated not to disassemble batteries or charge devices by their beds. If a battery appears swollen or leaks, it should be replaced immediately. Always ensure proper ventilation and prioritize safety.

[DiColton]

In terms of manufacturing, the explosion risks of lithium-ion batteries commonly encountered in production inspections are primarily due to quality defects. For instance, separator materials failing to meet standards with micropores can cause short circuits between the positive and negative electrodes. Production impurities leading to localized overheating or uneven electrode coatings result in voltage instability. Fault analysis indicates a high proportion of thermal runaway incidents, hence strict batch sampling tests must not cut corners by using inferior components. This explains the root cause of safety issues in recall cases.