DOUBLE BENT TYPE REFORM PIN

摘要

The present invention provides a reform pin with a new structure which minimizes damages and defects of a separator by sequentially progressing attaching-expansion for the separator with one reform pin by using a double bent reform pin, and also minimizes an untying or a spring back phenomenon of an electrode assembly by winding a shape of the separator formed by a reform process to be tightly attached along an inner part of a jelly roll.