What are the differences between 18650 battery and soft pack lithium battery?

The most intuitive difference between the 18650 lithium battery and the soft pack lithium battery from the outside is that the 18650 lithium battery is a cylindrical steel shell battery with basically the same size, while the soft pack lithium battery can be of any shape and size. The outer shell is a battery packaged in aluminum plastic film. The difference between the 18650 lithium battery and the soft pack lithium battery is that the materials used are different in terms of electrolyte, conductive agent, electrode formulation ratio, etc., and the processing technology is also different. The 18650 lithium 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 battery and the soft pack lithium 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 electrolyte inside the 18650 lithium battery is generally It is liquid. The third difference is in the high-current discharge performance of lithium batteries. The soft-pack lithium battery can achieve a higher rate than the 18650 lithium battery, and the performance of the soft-pack lithium battery is better in terms of high-current discharge stability. In terms of the same discharge requirements and capacity, the soft-pack lithium 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 the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: The difference between power lithium battery and consumer lithium battery