Why does the lithium battery catch fire?

The moving speed of lithium ions is limited. Once exceeded, it will become unstable, such as a short circuit. Although companies including Qualcomm are currently actively promoting fast charging technology, the charging speed must meet the limit of lithium-ion, and a stable environment must be created through some technologies to guard against short-circuit phenomena. If this link is not resolved, the short circuit will heat the electrolyte solution and the battery will catch fire. ●The evolution process of thermal runaway When the temperature of the lithium battery pack is too high to be uncontrollable, it is the so-called thermal runaway state. When the battery reaches thermal runaway, extreme accidents such as nature and explosion will occur. ●If the temperature is too high, if the lithium battery is exposed to a high-temperature environment or the internal components of the battery are damaged, the risk of fire and explosion of the battery will increase. ●Overcharged and over-discharged lithium batteries will cause the electrolyte to heat up and analyze the gas. The gas builds pressure inside the sealed battery, causing the lithium battery to expand. If the diaphragm is broken during the expansion process, the positive and negative electrodes contact will cause a short circuit and fire . Similarly, external high-power over-discharge will also cause the internal heating and expansion of the battery, and a damage process similar to that of over-charge will cause fire. Summary: Lithium battery fire is a very extreme thing, but the exposure is very high, giving people a frightening feeling. Therefore, in order to guard against this kind of things that bring us property damage and personal injury, we should carefully take preventive measures. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Why does the 18650 lithium battery have a history of blasting?