公开(公告)号：EP3780234A1

公开(公告)日：2021-02-17

申请号：EP19785263.5

申请日：2019-04-09

申请人： NISSAN MOTOR CO., LTD.

发明人： DOI, Shotaro ,  YAMAUCHI, Noboru ,  KUSACHI, Yuki ,  SATOU, Hajime ,  HORIE, Hideaki ,  NAKASHIMA, Yusuke ,  SHOJI, Naofumi ,  TSUCHIDA, Kazuya ,  SUMIYA, Koji ,  HATAZOE, Takumi ,  ASANO, Shigehito ,  ANDO, Nobuo

IPC分类号： H01M10/0568 ,  H01M4/13 ,  H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M10/052

摘要： Provided is a means that can suppress, in a non-aqueous electrolyte secondary battery that uses a negative electrode active material including a Si material and uses an electrolyte solution including LiFSI, the occurrence of an exothermic reaction that can cause deterioration of the battery even in a case when the battery temperature has risen.
A non-aqueous electrolyte secondary battery according to the present invention has a power generating element that includes a positive electrode in which a positive electrode active material layer including a positive electrode active material is formed on a surface of a positive electrode current collector, a negative electrode in which a negative electrode active material layer including a negative electrode active material is formed on a surface of a negative electrode current collector, and a separator impregnated with an electrolyte solution. Here, the negative electrode active material includes a Si material that contains silicon and is capable of insertion and removal of lithium ions. The electrolyte solution contains lithium bis (fluorosulfonyl) imide (LiFSI) and an inorganic lithium salt other than the LiFSI, and has a feature that a ratio of a concentration (mol/L) of the LiFSI with respect to a concentration (mol/L) of the inorganic lithium salt (LiFSI/inorganic lithium salt) in the electrolyte solution is 1 or less.

公开(公告)号：EP3780215A1

公开(公告)日：2021-02-17

申请号：EP19785619.8

申请日：2019-03-20

申请人： NISSAN MOTOR CO., LTD.

发明人： KABURAGI, Tomohiro ,  YODA, Kazuyuki ,  MINEGISHI, Eiji ,  YAMAUCHI, Noboru ,  EMORI, Yusuke ,  ISHITANI, Hideki ,  SHIMADA, Masanori

IPC分类号： H01M10/04 ,  H01M4/04 ,  H01M4/139 ,  H01M4/66 ,  H01M10/0585

摘要： [Problem] To provide a method for manufacturing a battery in which it is possible to reduce the internal resistance of the battery by molding a unit cell before an initial charging step.
[Solution] This method for manufacturing a battery 10 has: a unit cell formation step (S20) for forming a unit cell in which a positive electrode is obtained by a positive electrode active material layer containing an electrolytic solution being disposed on a positive electrode current collector, a negative electrode is obtained by a negative electrode active material layer containing an electrolytic solution being disposed on a negative electrode current collector, and a separator interposed between the positive electrode and the negative electrode; a surface pressing step (S40) for applying pressure by bringing a pressing surface of a pressing part into surface contact with one unit cell or with two or more stacked unit cells from the stacking direction; and an initial charging step (S50) for charging the one unit cell or the two or more stacked unit cells after performing the surface pressing step.