A cell includes a positive electrode plate, a negative electrode plate, and a separator. An insulating adhesive tape is attached to the positive electrode plate. A first adhesive-tape surface of the insulating adhesive tape is disposed on a same side as a first positive-electrode-plate surface of the positive electrode plate. The first positive-electrode-plate surface is arranged between the first adhesive-tape surface and the second adhesive-tape surface in the first direction. The second adhesive-tape surface is arranged between the first positive-electrode-plate surface and the second positive-electrode-plate surface in the first direction. The insulating adhesive tape extends from the first positive-electrode-plate end to the second positive-electrode-plate end in the second direction. A battery module, a battery pack, and a vehicle including same are also provided.