公开(公告)号：US11245148B2

公开(公告)日：2022-02-08

申请号：US16495943

申请日：2018-02-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuya Oka ,  Hiromasa Yagi ,  Yuma Kamiyama

IPC: H01M50/124 ,  H01M50/10 ,  H01M50/20 ,  H01M50/103 ,  H01M50/209

Abstract: A nonaqueous electrolyte secondary battery according to an embodiment includes an electrode assembly, a nonaqueous electrolyte, and a prismatic battery case accommodating the electrode assembly and the nonaqueous electrolyte. The mass energy density of the secondary battery is not less than 200 Wh/kg. The nonaqueous electrolyte secondary battery further includes a non-cellular elastic sheet disposed between the electrode assembly and the battery case. The ratio (A/B) of the thickness (A) of the elastic sheet at 100% SOC to the thickness (B) of the elastic sheet at 0% SOC is 0.05 to 0.3.

公开(公告)号：US20210135317A1

公开(公告)日：2021-05-06

申请号：US16639845

申请日：2018-12-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuya Oka ,  Hiroshi Yoshizawa ,  Shigeki Matsuta ,  Yoshiaki Araki

IPC: H01M50/48 ,  H01M50/474

Abstract: The power storage device is provided with a cell stack body formed by alternately arranging a plurality of secondary cells and a plurality of buffer plates. Each of the buffer plates has a non-deformable section and a deformable section that is elastically deformed according to a volume change in the secondary cell. The non-deformable section has a through hole in which the deformable section is fitted. The deformable section is formed thicker than the non-deformable section.

公开(公告)号：US11450917B2

公开(公告)日：2022-09-20

申请号：US16639845

申请日：2018-12-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuya Oka ,  Hiroshi Yoshizawa ,  Shigeki Matsuta ,  Yoshiaki Araki

IPC: H01M50/293 ,  H01M50/289 ,  H01M50/291

Abstract: The power storage device is provided with a cell stack body formed by alternately arranging a plurality of secondary cells and a plurality of buffer plates. Each of the buffer plates has a non-deformable section and a deformable section that is elastically deformed according to a volume change in the secondary cell. The non-deformable section has a through hole in which the deformable section is fitted. The deformable section is formed thicker than the non-deformable section.