SECONDARY CELL AND CELL SYSTEM

摘要

A secondary cell (101) includes: an angular cell can (1) having a positive electrode terminal (8) and a negative electrode terminal (9); an electrode group (G) arranged in the angular cell can (1) and having a sheet-shaped positive electrode (2) electrically connected to the positive electrode terminal (8) and a sheet-shaped negative electrode (3) electrically connected to the negative electrode terminal (9) which are overlain via a separator; a first and a second insulating auxiliary sheet (4) arranged at opposing positions so as to sandwich the electrode group (G) from the side of the longer side of the plane of the angular cell can (1) where the positive electrode terminal (8) and the negative electrode terminal (9) are formed; and a third and a fourth insulating auxiliary sheet (5) having substantially the same size as the inner size of the angular cell can in the shorter side direction of the aforementioned plane and arranged at opposing positions so as to sandwich the electrode group (G) from the side of the shorter side. The secondary cell (101) further includes a holding unit (6) having a plane (6a) in contact with the third or the fourth insulating auxiliary sheet (5) sandwiched by the plane (6a) and the electrode group (G). The holding unit (6) is arranged in the vicinity of four end portions (1c) of the angular cell can (1) and is integrally formed with the angular cell can.