公开(公告)号：US20240297386A1

公开(公告)日：2024-09-05

申请号：US17909935

申请日：2021-01-19

Applicant: SANYO Electric Co., Ltd.

Inventor： Yuji Ogishima ,  Takeshi Yoshida ,  Toyoki Fujihara ,  Keisuke Minami

IPC: H01M50/242 ,  H01M10/04 ,  H01M50/209 ,  H01M50/291

CPC classification number: H01M50/242 ,  H01M10/0431 ,  H01M50/209 ,  H01M50/291

Abstract: A battery pack includes rectangular secondary batteries arranged in a state in which the secondary batteries is pressed against each other in an arrangement direction through spacers. Each secondary battery is configured such that a flat wound electrode body is housed in a battery case with a winding axis extending parallel with a long side surface of the battery case. The electrode body has a flat portion in which positive and negative electrode material mixture layers face each other with a separator interposed therebetween. The spacers include a pair of first pressing portions pressing both end portions of the long side surface, which faces the flat portion, of the battery case in a winding axis direction along a direction perpendicular to the winding axis, and a second pressing portion pressing a portion of the long side surface along the winding axis between the pair of first pressing portions.