公开(公告)号：US12100547B2

公开(公告)日：2024-09-24

申请号：US16975001

申请日：2019-02-21

Applicant: Musashi Energy Solutions Co., Ltd.

Inventor： Kazunari Aita ,  Hiroki Yakushiji ,  Hirobumi Suzuki ,  Tomohiro Utaka ,  Masaya Naoi ,  Kenji Kojima

IPC: H01G11/06 ,  H01G11/50 ,  H01G11/52 ,  H01G11/66 ,  H01G11/86 ,  H01M4/02 ,  H01M4/134 ,  H01M4/36 ,  H01M4/80 ,  H01M10/0525

CPC classification number: H01G11/06 ,  H01G11/50 ,  H01G11/52 ,  H01G11/66 ,  H01G11/86 ,  H01M4/134 ,  H01M4/366 ,  H01M4/80 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: A power storage device includes: an electrode assembly, including a positive electrode, a separator, and a negative electrode; and an electrolyte solution. The negative electrode includes a negative electrode current collector, and a negative electrode active material layer formed on a surface of the negative electrode current collector. The negative electrode is doped with lithium. The power storage device includes first through-holes penetrating the negative electrode current collector in a thickness direction thereof. On at least one side of the negative electrode current collector, the power storage device includes second through-holes penetrating the negative electrode active material layer in a thickness direction thereof. An aperture ratio of the first through-holes on the negative electrode current collector, or an aperture ratio of the second through-holes on the negative electrode active material layer is 0.001% or higher and 1% or lower.