Electrode group and battery

Abstract

An electrode group includes a positive electrode, a negative electrode, and a current collecting tab. The current collecting tab is provided in one of the positive electrode and the negative electrode, and protrudes relative to the other of the positive electrode and the negative electrode. The current collecting tab is formed with one or more slit parts penetrating the current collecting tab in a thickness direction intersecting a protruding direction of the current collecting tab. Each of the one or more slit parts extends along a width direction intersecting both the protruding direction and the thickness direction. At each of the one or more slit parts, a circular portion is formed at at least one of the two ends in the width direction.

Dependencies are inferred from the claim text.