Several reasons for explosion and burning of lithium ion batteries

1. Internal short circuit of lithium-ion battery (mostly soft-packed large monomers): structure or process defects lead to the insertion of tabs, insufficient diaphragm wrapping, burrs, diaphragm discounts, etc. Interpolation of tabs often occurs in thick batteries and internally parallel structures. Insulation of tabs is not in place. Adding protective plates to subsequent products or simple application process leads to internal acute short circuit and then burning or explosion (internal short circuit: this is personally I have a deep understanding. At that time, more than 2K batteries of this kind were scrapped. The practice attributed to the design defect is essentially: internal acute short circuit), but this situation is almost rare now, unless external force elements. 2. External short circuit of lithium-ion battery: It is rare to see the explosion after burning caused by the external short circuit of the battery below 1AH. It is usually caused by bulging or simply burning the tabs. Personal analysis is outside the power lithium battery or large-capacity mobile phone battery. Burning caused by short circuit. This involves customers using improper installation of the metal outer box without considering the insulation of the tabs, and the battery smoking and burning abnormalities occur at the installation site; the power lithium battery is also often lack of structural fixing measures (not thoughtful), and the battery pack is used in the user’s application process. Shaking may cause damage to the battery's external insulation and protection film or damage to the connecting wire, which will eventually lead to short-circuit burning. 3. Lithium-ion battery overcharge explosion: This is the most risky, and the company is most afraid of it, but it still happens occasionally. From what we know, there are two points: a. The user does not use the matching charger as required, and then the protection circuit is damaged and the user often charges for an unlimited time. In this case, it is difficult to not explode; b. It is unreasonable and the protection board fails. In this case, it will also explode... the same is true for single-cell batteries. 4. The material of the lithium-ion battery is not good enough. If the material is not good enough, it may overheat under the calibrated voltage and current, and then an accident will occur. 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: Lithium-ion battery materials and application analysis