Battery cell and battery

The utility model relates to the technical field of batteries, in particular to a battery cell, which is formed by stacking positive plates, diaphragms and negative plates, the positive plates comprise a first positive plate and a second positive plate, the negative plates comprise a first negative plate and a second negative plate, a first positive tab is convexly arranged on the first positive plate, a second positive tab is convexly arranged on the second positive plate, and a second positive tab is convexly arranged on the second negative plate. The first positive tab and the second positive tab are respectively arranged on two adjacent side surfaces of the battery cell, and/or a first negative tab is convexly arranged on the first negative plate, a second negative tab is convexly arranged on the second negative plate, and the first negative tab and the second negative tab are respectively arranged on two adjacent side surfaces of the battery cell. As the first positive tab and the second positive tab are