CELL AND ELECTROCHEMICAL DEVICE

The present application discloses a cell and an electrochemical device. The cell includes: a first electrode sheet, a first electrode tab, a second electrode sheet, and a second electrode tab. The first electrode sheet includes a first current collector and a first active material layer. The first current collector includes a first end portion, and two sides of the first end portion are provided with the first active material layer. The second electrode sheet includes a second current collector and a second active material layer. The first end portion has a width being one third of a width of the first electrode tab. In a first direction, the cell has a thickness t at the first end portion, the cell has a thickness T at the first electrode tab or the second electrode tab, and t is greater than or equal to 95% of T.