公开(公告)号：US20250105368A1

公开(公告)日：2025-03-27

申请号：US18731000

申请日：2023-02-03

Applicant: FDK CORPORATION

Inventor： Satoshi MURASE ,  Soma SUZUKI ,  Tomomichi YAMAGUCHI ,  Takeshi ITO ,  Takahiro ENDO

IPC: H01M10/28 ,  H01M4/02 ,  H01M4/24 ,  H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M4/66 ,  H01M50/107 ,  H01M50/119 ,  H01M50/128 ,  H01M50/179 ,  H01M50/188 ,  H01M50/528 ,  H01M50/533

Abstract: A battery includes an exterior can, an electrode group housed together with an alkaline electrolyte in the exterior can, and a sealing member that seals the exterior can. The electrode group is formed by winding a positive electrode and a negative electrode stacked together with a separator interposed therebetween into a spiral shape and has a columnar overall shape. A protruding negative electrode edge portion that is a partially protruding portion of the negative electrode is located at a lower end surface portion of the electrode group, and the protruding negative electrode edge portion is in direct contact with the inner surface of a bottom wall of the exterior can.