CYLINDRICAL SECONDARY CELL LID COMPRISING MULTIPLE RECESSED CONTACT PORTIONS

This disclosure presents a cylindrical secondary cell lid () for a cylindrical secondary cell (), the cylindrical secondary cell lid () comprising a number of recessed contact portions () to be arranged in direct electrical contact with an electrode roll () arranged inside the cylindrical secondary cell (), the area of the recessed contact portions () being 50 to 80 percent of the total area of the cylindrical secondary cell lid ().