What is the difference between 18650 battery and soft pack lithium ion battery?

The most intuitive difference between the 18650 lithium ion battery and the soft pack lithium ion battery from the outside is that the 18650 lithium ion battery is a cylindrical steel shell battery with basically the same size, while the soft pack lithium ion battery can be of any shape and The size of the shape, the shell is a battery packaged in aluminum-plastic film. The difference between 18650 lithium-ion battery and soft-packed lithium-ion battery is that the materials used, such as electrolyte, conductive agent, electrode formulation ratio, etc., are different from the internal point of view, and the production process is also different. The 18650 lithium ion battery is generally packaged in a steel case (18 means a diameter of 18mm, 65 means a length of 65mm, 0 means a cylindrical battery), and the structure of the internal electrode sheet and diaphragm is a winding type. The outer packaging of the lithium polymer soft-pack battery is made of aluminum plastic film, and the internal electrode sheet and the separator are laminated (stacked one by one). Another difference between the 18650 lithium ion battery and the soft pack lithium ion battery is that the internal material and electrolyte of the battery are different: the electrolyte inside the lithium polymer soft pack battery is polymer, which is generally gel or solid, while the inside of the 18650 lithium ion battery The electrolyte is generally liquid. The third difference is in the high-current discharge performance of lithium-ion batteries. The soft-pack lithium-ion battery can achieve a higher rate than the 18650 lithium-ion battery, and the performance of the soft-pack lithium-ion battery is better in terms of high-current discharge stability. In terms of the same discharge requirements and capacity, the soft-pack lithium-ion battery can be customized according to the shape of the product battery compartment to achieve a more portable form. 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: What is the explosion-proof technology of lithium-ion batteries?