Is there a high probability of lithium battery explosion?

　　As long as it is a lithium battery, there is a chance of explosion, but the probability of explosion is not as high as imagined. According to research reports released by relevant institutions, the probability of developing malignant tumors in a person's lifetime is 22%, and the probability of lithium battery explosion is 3 in a million (estimated value). For every 1 million lithium batteries, there may be 1-3 lithium batteries that explode.

　　However, it should be noted that lithium batteries are not safe. Although they do not explode, the probability of spontaneous combustion is much higher than that of explosion. Many manufacturers consider the risk of explosion or spontaneous combustion when producing batteries and install additional safety protection devices. In most cases, they will not explode.

　　The main cause of lithium battery explosion is excessive "internal pressure", which is mainly due to "overcharging and discharging". During the charging and discharging process, the internal temperature of the battery is too high, the protective device fails, the pressure continues to rise, and ultimately an explosion occurs.

　　In fact, most lithium batteries come with built-in protective devices at the factory, such as temperature sensing and temperature control for charging and discharging status; For example, special partition materials can automatically change according to the temperature of the battery, preventing internal reactions in the battery; For example, an external "pressure relief valve" will open when the internal pressure of the battery reaches the set value, helping the battery release internal pressure (bulging).

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