What is the technological process of 18650 lithium batteries?

Process flow of 18650 lithium battery The 18650 lithium battery is a more commonly used lithium battery in electronic products, and it is often used as a battery in the battery of a notebook computer. The meaning of the model is as follows: For example, 18650 type, it refers to a cylindrical battery with a diameter of 18mm and a length of 65mm. The processing process of 18650 lithium battery core: Coating First of all, we know the coating process. In this process, you can see large coils of copper foil (yellow) and aluminum foil (silver). Aluminum foil is used to coat the nickel-cobalt-manganese NCM ternary material; on the contrary, copper foil is used to coat the negative electrode active material graphite; the white one is the diaphragm. Global lithium battery separators are mainly occupied by manufacturers such as Asahi, Celgard, SK, toray, and W-SCOP. These foreign companies hold nearly 70% of the market share. my country's diaphragm companies account for about 30% of the market share, and the independent localization of lithium battery diaphragms is making continuous breakthroughs. The capacity of the battery cell is based on the area of u200bu200bthese formulas. The second process of the 8650 lithium battery cell: Assemble the classified positive and negative electrodes, which will be fully automatically wrapped here, and the white material is the separator. The 18650 lithium battery cell still cannot work normally. Electrolyte must be added as a medium to allow the positive and negative electrodes to undergo a chemical reaction, so that lithium ions can migrate between the positive and negative electrodes, and the lithium battery can be charged and discharged when the charge ions output energy. After the automatic roll is wrapped, it rolls down directly on the assembly line and enters the next assembly step into the steel shell. The steel shell is integrally stamped and formed with a thickness of less than 1mm. Therefore, the strength and quality of the steel are required to be very high. This 18650 lithium battery cell factory uses imported Korean steel materials. 18650 lithium battery processing process three: first charge and test After the electrolyte is injected, the 18650 lithium battery has not actually been powered on, and the state of the positive and negative electrodes has not reached a stable state at this time, and it must be charged for the first time to be normal Use, this first charge is called formation. When charging for the first time, it needs to charge extra power to form a protective film on the surface of the electrode. This protective film is the secret of the low self-discharge of the lithium battery. At the same time, the nature of the protective film also affects the performance and life of the battery. Therefore, the formation process is very important. The formation is completed with a sub-container cabinet. 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 repair the Ni-MH battery?