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Many so-called battery explosion cases are not actually battery explosions, but capacitor explosions caused by short circuits or faults in controllers or electrical systems. These explosions are very small in scale, and many only have some noise and sparks. In this case, fire is the biggest source of danger. In the most serious case, the battery really exploded. One situation is that low-quality batteries do not have their own safety valves designed or the safety valves are damaged, making them unable to perform pressure relief purposes. When the internal pressure of the battery is too high, an explosion occurs; Another scenario is when the battery charger malfunctions, resulting in overcharging, and hydrogen gas is released inside the battery. When hydrogen and oxygen are mixed in a certain proportion, detonation occurs.
Reasons for explosion of lithium-ion batteries
1. Piercing: Compared to short circuits and overcharging, piercing lithium-ion batteries is also a very unwise practice. If a lithium-ion battery is pierced by any hard object, the lithium ions inside it will directly react with oxygen in the air, and there will also be a phenomenon of intense combustion.
2. Preventing high temperature and fire: High temperature or fire can also cause the explosion and combustion of lithium-ion batteries. Especially in hot summers or long periods of exposure to sunlight in cars, lithium-ion batteries can be stored in environments with temperatures higher than their normal storage temperature.
3. Long term overcharging of battery cells: Under long-term charging conditions, overcharging and overcurrent can also lead to high temperature and high voltage, causing hidden dangers. Lithium ion batteries may discharge instantaneously under special conditions such as temperature, humidity, and poor contact, resulting in a large amount of current and spontaneous combustion or explosion.
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