公开(公告)号：US11245148B2

公开(公告)日：2022-02-08

申请号：US16495943

申请日：2018-02-09

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Takuya Oka ,  Hiromasa Yagi ,  Yuma Kamiyama

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

摘要： 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.