公开(公告)号：US11670815B2

公开(公告)日：2023-06-06

申请号：US17659586

申请日：2022-04-18

Applicant: Northvolt AB

Inventor： Tetsuya Makino ,  Daniel Lowe

IPC: H01M50/107 ,  H01M50/533 ,  H01M10/04

CPC classification number: H01M50/107 ,  H01M10/0422 ,  H01M10/0431 ,  H01M50/533

Abstract: The disclosure provides a cylindrical secondary cell (1) and a method of its assembly. The cylindrical secondary cell (1) comprises a cylindrical can (2) comprising a beading groove (3), a first conductive sheet (4), with first electrode coating (4a), wound to form a jelly roll (5), the first conductive sheet (4) comprises a portion free of first electrode coating (4a) protruding on a first end side (5a), and an electrode lead plate (6) arranged at the first end side (5a) and in direct contact with the portion free of first electrode coating (4a). The electrode lead plate (6) comprises a flange (6a) extending away from the jelly roll (5) and arranged along the edge of the electrode lead plate (6). The beading groove (3) is arranged on the cylindrical can (2) such that the flange of the electrode lead plate (6) is bent and pressed inwards, towards a centre of the cylindrical can (2), by the beading groove (3).