Analyze the dangers of lithium batteries from several aspects

Lithium battery is a potentially dangerous chemical power source due to its chemical characteristics and system composition. 1 High chemical activity Lithium is the i-th important element in the second period of the periodic table and has extremely active chemical properties. 2High energy density lithium battery has extremely high specific energy (≥140Wh/kg), which is several times higher than nickel-cadmium, nickel-hydrogen and other secondary batteries. Once a thermal runaway reaction occurs, a large amount of heat will be released, which can easily lead to unsafe behavior. 3. Using organic electrolyte system The organic solvent of the organic electrolyte system is hydrocarbons, which has low decomposition voltage, is easy to oxidize, and the solvent is flammable. If a leak occurs, it will cause the battery to catch fire, or even burn and explode. 4. The probability of side reactions is very high. In the normal use of lithium batteries, the internal electric energy conversion and chemical energy chemical reactions. However, in some cases, such as overcharge, overdischarge or overcurrent operation, it is easy to cause chemical side reactions inside the battery; when the adverse reaction intensifies, it will seriously affect the performance and service life of the battery, and a large amount of gas may appear. The pressure inside the battery is rapidly increased, causing explosions and fires, causing safety problems. Unstable electrode material structure The charging reaction of a lithium battery will change the structure of the cathode material, causing the material to appear strongly for oxidation, and the solvent in the electrolyte will appear for intense oxidation. This use is irreversible. If the heat generated by the reaction accumulates, there will be a risk of heat loss of control. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Measures to improve the safety of lithium batteries