WINDING CELL AND POUCH BATTERY

The present application provides a jelly roll and a punch cell, and relates to the field of lithium battery technologies. The jelly roll includes a negative electrode plate, along a winding direction, an inner surface of a second bending region of the negative electrode plate is covered by a first tape layer, and in a thickness direction of the jelly roll, a projection of two ends of the first tape layer is connected to or partially overlapped with a projection of a winding head of the negative electrode plate. As a result, surface unevenness of the jelly roll is improved, thereby improving a flatness of a battery cell.