What is the cause of the explosion of the secondary battery?

Reasons for the explosion of secondary batteries Regarding the secondary battery system, there are certain safety protection measures from the battery itself to the charger, including charging current protection, charging voltage protection, and temperature control protection, and even several protections are applied at the same time. The main causes of secondary battery safety accidents include the battery material itself, battery manufacturing technology and improper use. Some secondary battery materials have certain safety hazards. For example, the organic electrolyte solution has a higher battery voltage than the aqueous electrolyte, but the organic solvent is volatile and easy to burn or explode; the metal lithium electrode material is easy to explode with water and air. In the secondary battery manufacturing process, due to some flaws in the process itself (especially prominent in informal processing manufacturers), the battery has potential safety hazards that may occur at any time. For example, metal dust or metal burrs such as copper foil or aluminum foil pierced through the diaphragm between the two poles that should be insulated, causing a micro short circuit. The short circuit causes the battery to generate a lot of heat, and the heat causes part of the electrolyte solution to vaporize, expand the battery shell, and even cause the battery to explode. Charging is one of the important steps of secondary batteries, but battery overcharging may cause safety accidents, and overcharging is an important reason for secondary batteries to explode. This is because: first, battery overcharging may cause electroplating effects and excessive heat generation It causes a safety accident; the second is that the charge termination voltage is too high or cannot be terminated and cause an accident. Frequent high-current charging and discharging of the secondary battery may also cause the battery to fail to work normally, and even have certain safety hazards, and even explode in extreme cases. 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: How to charge the lithium iron phosphate battery correctly?