Abstract: A cylindrical secondary cell (10) comprises a conductive sheet (20, 30) with a longitudinal direction, one or more coatings (24, 26) formed on the conductive sheet (20, 30), wherein the conductive sheet (20, 30) comprises a portion free of coating along an end side of the conductive sheet (20, 30), a plurality of notches (50) formed on the end side of the conductive sheet (20, 30) which is free of coating, wherein the notches (50) start on the edge of the conductive sheet (20, 30) and extend in the direction towards the coating (24, 26), and wherein the notches (50) are formed with a linear portion (52) and an end portion (54), wherein the end portion comprises a rounded cut out or is formed with a turn so that the end of the end portion is not directed towards the coating (24, 26), and that the part of the notches (50) closest to the coating (24, 26) is arranged within 2.5 mm or less from the coating (24, 26).

Abstract: The present disclosure relates to an electrode assembly comprising a positive electrode plate comprising a positive electrode coating portion on which a positive electrode active material is coated and a positive electrode non-coating portion on which the positive electrode active material is not coated; a negative electrode plate comprising a negative electrode coating portion on which a negative electrode active material is coated and a negative electrode non-coating portion on which the negative electrode active material is not coated; and a separator interposed between the positive and the negative electrode plate; wherein the separator comprises a substrate and a coating layer disposed on at least one surface of the substrate, wherein the coating layer comprises organic particles and inorganic particles, wherein an amount of the organic particles is in the range from 1.5 to 5 wt.