RECHARGEABLE BATTERY AND BATTERY SYSTEM

摘要

A rechargeable battery including: an angular battery can (1) having a positive electrode terminal and a negative electrode terminal; a group of electrodes which is disposed inside the angular battery can and in which a sheet-shaped positive electrode (2) electrically connected to the positive electrode terminal and a sheet-shaped negative electrode (2) electrically connected to the negative electrode terminal are stacked interposing a separator (7); and first and second insulating auxiliary sheets (8) which are disposed inside the angular battery can to have a width greater than a width of the group of electrodes along the long-side direction of a plane of the angular battery can where the positive electrode terminal and the negative electrode terminal are formed and to have a thickness capable of substantially covering a round part of a corner of the angular battery can, wherein the first and the second insulating auxiliary sheets (8) are disposed at mutually opposing positions in the long-side direction, with the group of electrodes held between them.