Why do lithium batteries generate heat and burn?

Originally, after many materials in the lithium battery come into contact with water, a violent chemical reaction can occur and a large amount of heat energy can be released to cause heat generation and incineration. The manganese dioxide in the positive electrode of a lithium battery generates heat with only a small drop of water. After the sulfurous chloride in the lithium battery contacts with water, it generates hydrochloric acid and sulfur dioxide together to release heat. Several factors make the lithium battery a kind of fire in the day. Therefore, people must pay attention to waterproof and moisture-proof when using lithium batteries. After the various hosts are out of service, the lithium batteries should be removed and stored in a dry, low-temperature place for safekeeping to prevent and guard against the onset of household fire accidents caused by improper use of lithium batteries. The battery will not swell under normal conditions after a long time. The reason for the battery swelling is that the charging time is too long. It will not affect the application, but the standby time will be shorter and shorter. The reason why the battery heats up and swells: a. The power consumption of the mobile phone in standby is very small, that is, the equivalent load resistance of its battery is large, so the discharge current is very small, so the battery does not heat up, and the internal consumption of battery power is very high small. b. The power consumption of the mobile phone when it is in a call or game is very large, that is to say, the equivalent load resistance of its battery is small, and it is discharged by a large current during operation. After a part of the battery is discharged, the internal resistance will increase. However, the current required by the mobile phone cannot be reduced. Then, a moderately large part of the energy will be consumed in the internal resistance of the battery, causing the battery to heat up and discharge faster. The use time is quickly shortened. The above is the reason why mobile phone batteries will heat up during long-term use. 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 post: What is the level of domestic power lithium-ion battery cell technology?