How to design the internal structure of the lithium battery pack?

The positive and negative electrodes of the lithium battery pack should be clean, and the electrolyte and diaphragm between the shuttles should be free of impurities. However, during the manufacturing process, the electrolyte and the diaphragm are difficult to completely prevent metal dust, copper or aluminum foil and other debris. When people use improperly (overcharge, overdischarge, overcurrent) or explode the lithium battery in extreme environments (excessive temperature), the lithium battery will overheat, and the quiet state of the fragments at room temperature will be broken, which will Thermal movement takes place in the hot electrolyte space. In the next step, if the fragments are close to the diaphragm, the hot fragments will affect the isolation purpose of the diaphragm and cause a short circuit. Therefore, there is now a polymer lithium battery with a gel electrolyte instead of a liquid electrolyte, which can reduce the probability of short circuits. The working principle of lithium battery pack: Lithium battery pack is a kind of secondary battery (rechargeable battery), which mainly relies on the intercalation and deintercalation of lithium ions between the positive and negative electrodes to achieve energy storage and release. When the battery is charged, lithium ions are generated on the positive electrode of the battery, and the generated lithium ions move to the negative electrode through the electrolyte. The carbon as the negative electrode has a layered structure. It has many micropores. The lithium ions reaching the negative electrode are embedded in the micropores of the carbon layer. The more lithium ions are inserted, the higher the charging capacity. Similarly, when the battery is discharged, the lithium ions embedded in the carbon layer of the negative electrode are released and move back to the positive electrode. The more lithium ions returned to the positive electrode, the higher the discharge capacity. Lithium battery composition principle ①Positive structure LiMn2O4 (lithium manganate) + conductive agent (acetylene black) + binder (PVDF) + current collector (aluminum foil) positive electrode ② negative structure graphite + conductive agent (acetylene black) + binder (PVDF) + current collector (copper foil) negative statement: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous article: What are the general characteristics of parallel charging of lithium battery packs?