What is the function of the separator in a lithium battery?

Of course, the separator separates the positive and negative electrode materials. On one side, the copper foil is covered with a negative electrode material and the aluminum foil is covered with a positive electrode material. The positive and negative electrodes are separated by a separator, and the materials of the positive and negative electrodes enter this separator to discharge. Currently, most of them are imported. They say that servants are not too mature. Belongs to polymer materials. It should have some technological content. . . This separator is very important. Once pierced by impurities or hard objects, the battery is equivalent to a short circuit and may bulge. This is called flatulence. . Big belly