公开(公告)号：EP3683881A1

公开(公告)日：2020-07-22

申请号：EP20150883.5

申请日：2020-01-09

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： YAMADA, Takanobu ,  KATO, Masaki

IPC分类号： H01M10/0525 ,  H01M10/42 ,  H01M4/66 ,  H01M4/62 ,  H01M4/02

摘要： A lithium ion secondary battery suppressed in heat generation entailed by charging and discharging is provided. A lithium ion secondary battery includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode collector, a positive electrode active material layer provided at some part of the surface of the positive electrode collector, and including a positive electrode active material, and an insulation layer provided so as to be at the other part of the surface of the positive electrode collector and to be adjacent to the positive electrode active material layer. The insulation layer includes an inorganic filler, LPO, and a binder.