Why does the lithium battery increase? What are the reasons

1. When the lithium battery is charged, the temperature of the lithium battery will undoubtedly continue to rise, but under normal circumstances it will not exceed a certain rated temperature, but overcharging will cause the lithium battery electrolyte to dissolve and the air pressure will expand. The battery continues to rise. The key lies in the customer. If the customer is negligent when using lithium battery products, such as overcharge and overdischarge, or continuous use in an extremely harsh natural environment, it may also force the lithium battery to swell. 2. Newly added processing and production; under normal circumstances, abnormalities in the processing process (such as short-circuit failure, over-temperature, etc.) cause the internal electrolyte of the lithium battery to overheat and lithium ions continue to rise. Manufacturers’ processing and manufacturing problems, processing and manufacturing environmental problems, and processing and manufacturing machinery and equipment are dilapidated and outdated, which results in irregular metal coatings of the battery and infiltration of dust particles in the electrolyte of the lithium battery. All of these are likely to force the lithium battery pack to form a swelling phenomenon when the customer is in use, and even pose a greater safety risk. 3. Expansion during cycling. When the rechargeable battery is in the circulatory system, the film thickness increases as the frequency of the circulatory system increases, but after more than 50 weeks, the substrate does not increase. Normally, the normal rate of increase is 0.30.6mm , The aluminum shell is more serious, this situation belongs to the reflection of all normal rechargeable batteries. However, if the thickness of the shell is increased or the internal raw materials are reduced, the continued increase can be reduced. The overall level of battery processing and manufacturing, the metal electrode metal coating is not irregular, and the manufacturing process is relatively rough; 4. The battery has a short-circuit fault problem. Under normal circumstances, the welding position has an error, and the appropriate welding position should be It is welded on the bottom or side. The side with no sign and a large number cannot be welded. In addition, some of these have poor welding performance, so high-current welding is used, which makes the internal high-temperature resistant welding tape effective and causes the lithium-ion internal short-circuit failure. The chemical reaction of the open circuit and short circuit fault will generate a large amount of heat. At the same time, the thin and long length will form a resonance phenomenon to analyze the vaporization, and the battery will swell. 5. It is also possible that the battery has not been used for a long time and is worn out. Obsolete means that the battery has not been used for a long time, and no better storage and disposal have been carried out afterwards. When it is exposed to the air for a long period of time, it is not in use, and the electricity is flooded. The important thing is that since the air is conductive to a corresponding degree, too long a period of time is equivalent to direct contact between the positive and negative electrodes of the battery, causing a chronic short-circuit failure. The key to the formation and expansion of lithium batteries is that the key to the principle is that the structure of the battery forms a strong chemical reaction that is infinitely close to the short-circuit failure, forming a large amount of heat, and then causing the electrolyte to analyze and vaporize, and the lithium battery will bulge. 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: Comparison of the advantages and disadvantages of lithium batteries and lead-acid batteries