BATTERY CELL HAVING ASYMMETRIC AND INDENTED STRUCTURE

摘要

Disclosed herein is a battery cell configured to have a structure in which an electrode assembly, including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, is mounted in a battery case, wherein the electrode assembly includes two or more unit cells having different planar sizes, the unit cells being stacked in the height direction on the basis of a plane, at least one unit cell (a) selected from among the unit cells has an asymmetric structure formed on at least one side of the outer edge thereof on the basis of a middle axis crossing a main body of the unit cell (a) when viewed from above, and at least one unit cell (b) selected from among the unit cells has an indented portion indented from at least one side of the unit cell (b) toward the middle of the unit cell (b).

主权项

1. A battery cell configured to have a structure in which an electrode assembly, comprising a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, is mounted in a battery case, wherein
the electrode assembly comprises two or more unit cells having different planar sizes, the unit cells being stacked in a height direction on a basis of a plane, at least one unit cell (a) selected from among the unit cells has an asymmetric structure formed on at least one side of an outer edge thereof on a basis of a middle axis crossing a main body of the unit cell (a) when viewed from above, and at least one unit cell (b) selected from among the unit cells has an indented portion, indented from at least one side of the unit cell (b) toward a middle of the unit cell (b).