1. Frequent charge.

　　2. Unauthorized modification shell.

　　3. The ambient temperature exceeds 60 ° C.

　　4. The tear presented by the barrier of the lithium -ion battery and the orthopedic pole can cause short circuit, and short circuit often causes heat dispersion.

　　Participating in the "heat out of control" is the oxide chemical in the lithium battery. The chemicals of heating reach a certain temperature, it starts to spontaneously heat, and then develops a fire and blasting. In some cases, the release pressure of this organic electrolyte can cause the battery to break. If it is exposed to a high -temperature environment or encounters a spark, it may burn.

　　The probability of thermal output is related to the base of the lithium battery. The output of lithium battery in China, Japan and South Korea has increased year by year. Especially in the field of mobile phones/notebook computers, the battery event seems to be more. From 2006 to 2011, many large -scale electronic companies have arisen related things. Since entering 2012, small electronic products have been produced less, but large -scale use, such as incidents on airplanes, are commonly reported, which illustrates the following phenomena.

　　The phenomenon of heat out of control and its strength are related to the fineness of lithium batteries, equipment and the number of battery units. The small lithium battery pack only needs a few lithium battery cells, so the timing of heat discharge from the problematic battery unit to other units is relatively low. The Boeing 787 huge battery pack is something else: they are packed in the sealed metal box, and the remaining heat cannot be discharged. When a battery unit is hot enough to point the electrolyte, the other battery unit will follow up quickly.

　　In addition, the metal lithium is very lively, and it can directly respond to the electrolytic solution and the heat is placed. The melting point is very low. Even if the appearance of the metal lithium branch crystal does not pierce the gap, as long as the temperature is slightly higher, the metal lithium will dissolve, which will cause short circuit. The higher the temperature of the data to oxidize and restore the heat response, the weaker the oxidation can be marked, the stronger the oxidation of the positive pole data.

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