1, when the temperature of the lithium battery increases, the active material of the positive material will decompose and react, and at the same time, the electrolyte oxidation, which will produce a lot of heat, and then raise the battery temperature again, which will affect the stability of the battery. When the temperature of the lithium battery is too high, the negative electrode of the battery will have exothermic reaction with the electrolyte, which will lead to overheating of the battery and combustion and explosion, which is dangerous.
2, lithium batteries in the manufacturing process needs to be standardized, rigorous, the production process, the quality of the battery material, paste uniformity, coating, cutting control is very important, the battery assembly and other procedures of each process will affect the safety performance and quality of the battery. For example, the quality control of the processes such as positive and negative electrode mixing, coating, rolling, cutting or punching, assembling, filling the amount of electrolyte, sealing, and chemicalization are all affecting the performance and safety of the battery.
3, lithium batteries in the use of the process should be avoided as far as possible to avoid overcharge or overdischarge, a long time charging will make the battery bulge and expansion, the internal temperature once more than the set value, the extreme case may trigger the battery short-circuit, and lead to battery combustion or explosion. If the charging method is not appropriate, it is also very likely that the battery will be a security risk.